| File: | src/usr.bin/ssh/sftp-server/../misc.c |
| Warning: | line 1197, column 7 Value stored to 'i' is never read |
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| 1 | /* $OpenBSD: misc.c,v 1.172 2022/01/08 07:32:45 djm Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 4 | * Copyright (c) 2005-2020 Damien Miller. All rights reserved. |
| 5 | * Copyright (c) 2004 Henning Brauer <henning@openbsd.org> |
| 6 | * |
| 7 | * Permission to use, copy, modify, and distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/ioctl.h> |
| 23 | #include <sys/socket.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <sys/time.h> |
| 26 | #include <sys/wait.h> |
| 27 | #include <sys/un.h> |
| 28 | |
| 29 | #include <net/if.h> |
| 30 | #include <netinet/in.h> |
| 31 | #include <netinet/ip.h> |
| 32 | #include <netinet/tcp.h> |
| 33 | #include <arpa/inet.h> |
| 34 | |
| 35 | #include <ctype.h> |
| 36 | #include <errno(*__errno()).h> |
| 37 | #include <fcntl.h> |
| 38 | #include <netdb.h> |
| 39 | #include <paths.h> |
| 40 | #include <pwd.h> |
| 41 | #include <libgen.h> |
| 42 | #include <limits.h> |
| 43 | #include <poll.h> |
| 44 | #include <signal.h> |
| 45 | #include <stdarg.h> |
| 46 | #include <stdio.h> |
| 47 | #include <stdlib.h> |
| 48 | #include <string.h> |
| 49 | #include <unistd.h> |
| 50 | |
| 51 | #include "xmalloc.h" |
| 52 | #include "misc.h" |
| 53 | #include "log.h" |
| 54 | #include "ssh.h" |
| 55 | #include "sshbuf.h" |
| 56 | #include "ssherr.h" |
| 57 | |
| 58 | /* remove newline at end of string */ |
| 59 | char * |
| 60 | chop(char *s) |
| 61 | { |
| 62 | char *t = s; |
| 63 | while (*t) { |
| 64 | if (*t == '\n' || *t == '\r') { |
| 65 | *t = '\0'; |
| 66 | return s; |
| 67 | } |
| 68 | t++; |
| 69 | } |
| 70 | return s; |
| 71 | |
| 72 | } |
| 73 | |
| 74 | /* remove whitespace from end of string */ |
| 75 | void |
| 76 | rtrim(char *s) |
| 77 | { |
| 78 | size_t i; |
| 79 | |
| 80 | if ((i = strlen(s)) == 0) |
| 81 | return; |
| 82 | for (i--; i > 0; i--) { |
| 83 | if (isspace((int)s[i])) |
| 84 | s[i] = '\0'; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | /* set/unset filedescriptor to non-blocking */ |
| 89 | int |
| 90 | set_nonblock(int fd) |
| 91 | { |
| 92 | int val; |
| 93 | |
| 94 | val = fcntl(fd, F_GETFL3); |
| 95 | if (val == -1) { |
| 96 | error("fcntl(%d, F_GETFL): %s", fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 96, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "fcntl(%d, F_GETFL): %s" , fd, strerror((*__errno()))); |
| 97 | return (-1); |
| 98 | } |
| 99 | if (val & O_NONBLOCK0x0004) { |
| 100 | debug3("fd %d is O_NONBLOCK", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 100, 0, SYSLOG_LEVEL_DEBUG3, ((void *)0), "fd %d is O_NONBLOCK" , fd); |
| 101 | return (0); |
| 102 | } |
| 103 | debug2("fd %d setting O_NONBLOCK", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 103, 0, SYSLOG_LEVEL_DEBUG2, ((void *)0), "fd %d setting O_NONBLOCK" , fd); |
| 104 | val |= O_NONBLOCK0x0004; |
| 105 | if (fcntl(fd, F_SETFL4, val) == -1) { |
| 106 | debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 107, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "fcntl(%d, F_SETFL, O_NONBLOCK): %s" , fd, strerror((*__errno()))) |
| 107 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 107, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "fcntl(%d, F_SETFL, O_NONBLOCK): %s" , fd, strerror((*__errno()))); |
| 108 | return (-1); |
| 109 | } |
| 110 | return (0); |
| 111 | } |
| 112 | |
| 113 | int |
| 114 | unset_nonblock(int fd) |
| 115 | { |
| 116 | int val; |
| 117 | |
| 118 | val = fcntl(fd, F_GETFL3); |
| 119 | if (val == -1) { |
| 120 | error("fcntl(%d, F_GETFL): %s", fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 120, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "fcntl(%d, F_GETFL): %s" , fd, strerror((*__errno()))); |
| 121 | return (-1); |
| 122 | } |
| 123 | if (!(val & O_NONBLOCK0x0004)) { |
| 124 | debug3("fd %d is not O_NONBLOCK", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 124, 0, SYSLOG_LEVEL_DEBUG3, ((void *)0), "fd %d is not O_NONBLOCK" , fd); |
| 125 | return (0); |
| 126 | } |
| 127 | debug("fd %d clearing O_NONBLOCK", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 127, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "fd %d clearing O_NONBLOCK" , fd); |
| 128 | val &= ~O_NONBLOCK0x0004; |
| 129 | if (fcntl(fd, F_SETFL4, val) == -1) { |
| 130 | debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 131, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "fcntl(%d, F_SETFL, ~O_NONBLOCK): %s" , fd, strerror((*__errno()))) |
| 131 | fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 131, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "fcntl(%d, F_SETFL, ~O_NONBLOCK): %s" , fd, strerror((*__errno()))); |
| 132 | return (-1); |
| 133 | } |
| 134 | return (0); |
| 135 | } |
| 136 | |
| 137 | const char * |
| 138 | ssh_gai_strerror(int gaierr) |
| 139 | { |
| 140 | if (gaierr == EAI_SYSTEM-11 && errno(*__errno()) != 0) |
| 141 | return strerror(errno(*__errno())); |
| 142 | return gai_strerror(gaierr); |
| 143 | } |
| 144 | |
| 145 | /* disable nagle on socket */ |
| 146 | void |
| 147 | set_nodelay(int fd) |
| 148 | { |
| 149 | int opt; |
| 150 | socklen_t optlen; |
| 151 | |
| 152 | optlen = sizeof opt; |
| 153 | if (getsockopt(fd, IPPROTO_TCP6, TCP_NODELAY0x01, &opt, &optlen) == -1) { |
| 154 | debug("getsockopt TCP_NODELAY: %.100s", strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 154, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "getsockopt TCP_NODELAY: %.100s" , strerror((*__errno()))); |
| 155 | return; |
| 156 | } |
| 157 | if (opt == 1) { |
| 158 | debug2("fd %d is TCP_NODELAY", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 158, 0, SYSLOG_LEVEL_DEBUG2, ((void *)0), "fd %d is TCP_NODELAY" , fd); |
| 159 | return; |
| 160 | } |
| 161 | opt = 1; |
| 162 | debug2("fd %d setting TCP_NODELAY", fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 162, 0, SYSLOG_LEVEL_DEBUG2, ((void *)0), "fd %d setting TCP_NODELAY" , fd); |
| 163 | if (setsockopt(fd, IPPROTO_TCP6, TCP_NODELAY0x01, &opt, sizeof opt) == -1) |
| 164 | error("setsockopt TCP_NODELAY: %.100s", strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 164, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt TCP_NODELAY: %.100s" , strerror((*__errno()))); |
| 165 | } |
| 166 | |
| 167 | /* Allow local port reuse in TIME_WAIT */ |
| 168 | int |
| 169 | set_reuseaddr(int fd) |
| 170 | { |
| 171 | int on = 1; |
| 172 | |
| 173 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, &on, sizeof(on)) == -1) { |
| 174 | error("setsockopt SO_REUSEADDR fd %d: %s", fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 174, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt SO_REUSEADDR fd %d: %s" , fd, strerror((*__errno()))); |
| 175 | return -1; |
| 176 | } |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* Get/set routing domain */ |
| 181 | char * |
| 182 | get_rdomain(int fd) |
| 183 | { |
| 184 | int rtable; |
| 185 | char *ret; |
| 186 | socklen_t len = sizeof(rtable); |
| 187 | |
| 188 | if (getsockopt(fd, SOL_SOCKET0xffff, SO_RTABLE0x1021, &rtable, &len) == -1) { |
| 189 | error("Failed to get routing domain for fd %d: %s",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 190, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Failed to get routing domain for fd %d: %s" , fd, strerror((*__errno()))) |
| 190 | fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 190, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Failed to get routing domain for fd %d: %s" , fd, strerror((*__errno()))); |
| 191 | return NULL((void *)0); |
| 192 | } |
| 193 | xasprintf(&ret, "%d", rtable); |
| 194 | return ret; |
| 195 | } |
| 196 | |
| 197 | int |
| 198 | set_rdomain(int fd, const char *name) |
| 199 | { |
| 200 | int rtable; |
| 201 | const char *errstr; |
| 202 | |
| 203 | if (name == NULL((void *)0)) |
| 204 | return 0; /* default table */ |
| 205 | |
| 206 | rtable = (int)strtonum(name, 0, 255, &errstr); |
| 207 | if (errstr != NULL((void *)0)) { |
| 208 | /* Shouldn't happen */ |
| 209 | error("Invalid routing domain \"%s\": %s", name, errstr)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 209, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Invalid routing domain \"%s\": %s" , name, errstr); |
| 210 | return -1; |
| 211 | } |
| 212 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_RTABLE0x1021, |
| 213 | &rtable, sizeof(rtable)) == -1) { |
| 214 | error("Failed to set routing domain %d on fd %d: %s",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 215, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Failed to set routing domain %d on fd %d: %s" , rtable, fd, strerror((*__errno()))) |
| 215 | rtable, fd, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 215, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Failed to set routing domain %d on fd %d: %s" , rtable, fd, strerror((*__errno()))); |
| 216 | return -1; |
| 217 | } |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | int |
| 222 | get_sock_af(int fd) |
| 223 | { |
| 224 | struct sockaddr_storage to; |
| 225 | socklen_t tolen = sizeof(to); |
| 226 | |
| 227 | memset(&to, 0, sizeof(to)); |
| 228 | if (getsockname(fd, (struct sockaddr *)&to, &tolen) == -1) |
| 229 | return -1; |
| 230 | return to.ss_family; |
| 231 | } |
| 232 | |
| 233 | void |
| 234 | set_sock_tos(int fd, int tos) |
| 235 | { |
| 236 | int af; |
| 237 | |
| 238 | switch ((af = get_sock_af(fd))) { |
| 239 | case -1: |
| 240 | /* assume not a socket */ |
| 241 | break; |
| 242 | case AF_INET2: |
| 243 | debug3_f("set socket %d IP_TOS 0x%02x", fd, tos)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 243, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "set socket %d IP_TOS 0x%02x" , fd, tos); |
| 244 | if (setsockopt(fd, IPPROTO_IP0, IP_TOS3, |
| 245 | &tos, sizeof(tos)) == -1) { |
| 246 | error("setsockopt socket %d IP_TOS %d: %s:",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 247, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt socket %d IP_TOS %d: %s:" , fd, tos, strerror((*__errno()))) |
| 247 | fd, tos, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 247, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt socket %d IP_TOS %d: %s:" , fd, tos, strerror((*__errno()))); |
| 248 | } |
| 249 | break; |
| 250 | case AF_INET624: |
| 251 | debug3_f("set socket %d IPV6_TCLASS 0x%02x", fd, tos)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 251, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "set socket %d IPV6_TCLASS 0x%02x" , fd, tos); |
| 252 | if (setsockopt(fd, IPPROTO_IPV641, IPV6_TCLASS61, |
| 253 | &tos, sizeof(tos)) == -1) { |
| 254 | error("setsockopt socket %d IPV6_TCLASS %d: %.100s:",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 255, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt socket %d IPV6_TCLASS %d: %.100s:" , fd, tos, strerror((*__errno()))) |
| 255 | fd, tos, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 255, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "setsockopt socket %d IPV6_TCLASS %d: %.100s:" , fd, tos, strerror((*__errno()))); |
| 256 | } |
| 257 | break; |
| 258 | default: |
| 259 | debug2_f("unsupported socket family %d", af)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 259, 1, SYSLOG_LEVEL_DEBUG2, ((void *)0), "unsupported socket family %d" , af); |
| 260 | break; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * Wait up to *timeoutp milliseconds for events on fd. Updates |
| 266 | * *timeoutp with time remaining. |
| 267 | * Returns 0 if fd ready or -1 on timeout or error (see errno). |
| 268 | */ |
| 269 | static int |
| 270 | waitfd(int fd, int *timeoutp, short events) |
| 271 | { |
| 272 | struct pollfd pfd; |
| 273 | struct timeval t_start; |
| 274 | int oerrno, r; |
| 275 | |
| 276 | pfd.fd = fd; |
| 277 | pfd.events = events; |
| 278 | for (; *timeoutp >= 0;) { |
| 279 | monotime_tv(&t_start); |
| 280 | r = poll(&pfd, 1, *timeoutp); |
| 281 | oerrno = errno(*__errno()); |
| 282 | ms_subtract_diff(&t_start, timeoutp); |
| 283 | errno(*__errno()) = oerrno; |
| 284 | if (r > 0) |
| 285 | return 0; |
| 286 | else if (r == -1 && errno(*__errno()) != EAGAIN35 && errno(*__errno()) != EINTR4) |
| 287 | return -1; |
| 288 | else if (r == 0) |
| 289 | break; |
| 290 | } |
| 291 | /* timeout */ |
| 292 | errno(*__errno()) = ETIMEDOUT60; |
| 293 | return -1; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * Wait up to *timeoutp milliseconds for fd to be readable. Updates |
| 298 | * *timeoutp with time remaining. |
| 299 | * Returns 0 if fd ready or -1 on timeout or error (see errno). |
| 300 | */ |
| 301 | int |
| 302 | waitrfd(int fd, int *timeoutp) { |
| 303 | return waitfd(fd, timeoutp, POLLIN0x0001); |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Attempt a non-blocking connect(2) to the specified address, waiting up to |
| 308 | * *timeoutp milliseconds for the connection to complete. If the timeout is |
| 309 | * <=0, then wait indefinitely. |
| 310 | * |
| 311 | * Returns 0 on success or -1 on failure. |
| 312 | */ |
| 313 | int |
| 314 | timeout_connect(int sockfd, const struct sockaddr *serv_addr, |
| 315 | socklen_t addrlen, int *timeoutp) |
| 316 | { |
| 317 | int optval = 0; |
| 318 | socklen_t optlen = sizeof(optval); |
| 319 | |
| 320 | /* No timeout: just do a blocking connect() */ |
| 321 | if (timeoutp == NULL((void *)0) || *timeoutp <= 0) |
| 322 | return connect(sockfd, serv_addr, addrlen); |
| 323 | |
| 324 | set_nonblock(sockfd); |
| 325 | for (;;) { |
| 326 | if (connect(sockfd, serv_addr, addrlen) == 0) { |
| 327 | /* Succeeded already? */ |
| 328 | unset_nonblock(sockfd); |
| 329 | return 0; |
| 330 | } else if (errno(*__errno()) == EINTR4) |
| 331 | continue; |
| 332 | else if (errno(*__errno()) != EINPROGRESS36) |
| 333 | return -1; |
| 334 | break; |
| 335 | } |
| 336 | |
| 337 | if (waitfd(sockfd, timeoutp, POLLIN0x0001 | POLLOUT0x0004) == -1) |
| 338 | return -1; |
| 339 | |
| 340 | /* Completed or failed */ |
| 341 | if (getsockopt(sockfd, SOL_SOCKET0xffff, SO_ERROR0x1007, &optval, &optlen) == -1) { |
| 342 | debug("getsockopt: %s", strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 342, 0, SYSLOG_LEVEL_DEBUG1, ((void *)0), "getsockopt: %s", strerror((*__errno()))); |
| 343 | return -1; |
| 344 | } |
| 345 | if (optval != 0) { |
| 346 | errno(*__errno()) = optval; |
| 347 | return -1; |
| 348 | } |
| 349 | unset_nonblock(sockfd); |
| 350 | return 0; |
| 351 | } |
| 352 | |
| 353 | /* Characters considered whitespace in strsep calls. */ |
| 354 | #define WHITESPACE" \t\r\n" " \t\r\n" |
| 355 | #define QUOTE"\"" "\"" |
| 356 | |
| 357 | /* return next token in configuration line */ |
| 358 | static char * |
| 359 | strdelim_internal(char **s, int split_equals) |
| 360 | { |
| 361 | char *old; |
| 362 | int wspace = 0; |
| 363 | |
| 364 | if (*s == NULL((void *)0)) |
| 365 | return NULL((void *)0); |
| 366 | |
| 367 | old = *s; |
| 368 | |
| 369 | *s = strpbrk(*s, |
| 370 | split_equals ? WHITESPACE" \t\r\n" QUOTE"\"" "=" : WHITESPACE" \t\r\n" QUOTE"\""); |
| 371 | if (*s == NULL((void *)0)) |
| 372 | return (old); |
| 373 | |
| 374 | if (*s[0] == '\"') { |
| 375 | memmove(*s, *s + 1, strlen(*s)); /* move nul too */ |
| 376 | /* Find matching quote */ |
| 377 | if ((*s = strpbrk(*s, QUOTE"\"")) == NULL((void *)0)) { |
| 378 | return (NULL((void *)0)); /* no matching quote */ |
| 379 | } else { |
| 380 | *s[0] = '\0'; |
| 381 | *s += strspn(*s + 1, WHITESPACE" \t\r\n") + 1; |
| 382 | return (old); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | /* Allow only one '=' to be skipped */ |
| 387 | if (split_equals && *s[0] == '=') |
| 388 | wspace = 1; |
| 389 | *s[0] = '\0'; |
| 390 | |
| 391 | /* Skip any extra whitespace after first token */ |
| 392 | *s += strspn(*s + 1, WHITESPACE" \t\r\n") + 1; |
| 393 | if (split_equals && *s[0] == '=' && !wspace) |
| 394 | *s += strspn(*s + 1, WHITESPACE" \t\r\n") + 1; |
| 395 | |
| 396 | return (old); |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Return next token in configuration line; splts on whitespace or a |
| 401 | * single '=' character. |
| 402 | */ |
| 403 | char * |
| 404 | strdelim(char **s) |
| 405 | { |
| 406 | return strdelim_internal(s, 1); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * Return next token in configuration line; splts on whitespace only. |
| 411 | */ |
| 412 | char * |
| 413 | strdelimw(char **s) |
| 414 | { |
| 415 | return strdelim_internal(s, 0); |
| 416 | } |
| 417 | |
| 418 | struct passwd * |
| 419 | pwcopy(struct passwd *pw) |
| 420 | { |
| 421 | struct passwd *copy = xcalloc(1, sizeof(*copy)); |
| 422 | |
| 423 | copy->pw_name = xstrdup(pw->pw_name); |
| 424 | copy->pw_passwd = xstrdup(pw->pw_passwd); |
| 425 | copy->pw_gecos = xstrdup(pw->pw_gecos); |
| 426 | copy->pw_uid = pw->pw_uid; |
| 427 | copy->pw_gid = pw->pw_gid; |
| 428 | copy->pw_expire = pw->pw_expire; |
| 429 | copy->pw_change = pw->pw_change; |
| 430 | copy->pw_class = xstrdup(pw->pw_class); |
| 431 | copy->pw_dir = xstrdup(pw->pw_dir); |
| 432 | copy->pw_shell = xstrdup(pw->pw_shell); |
| 433 | return copy; |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Convert ASCII string to TCP/IP port number. |
| 438 | * Port must be >=0 and <=65535. |
| 439 | * Return -1 if invalid. |
| 440 | */ |
| 441 | int |
| 442 | a2port(const char *s) |
| 443 | { |
| 444 | struct servent *se; |
| 445 | long long port; |
| 446 | const char *errstr; |
| 447 | |
| 448 | port = strtonum(s, 0, 65535, &errstr); |
| 449 | if (errstr == NULL((void *)0)) |
| 450 | return (int)port; |
| 451 | if ((se = getservbyname(s, "tcp")) != NULL((void *)0)) |
| 452 | return ntohs(se->s_port)(__uint16_t)(__builtin_constant_p(se->s_port) ? (__uint16_t )(((__uint16_t)(se->s_port) & 0xffU) << 8 | ((__uint16_t )(se->s_port) & 0xff00U) >> 8) : __swap16md(se-> s_port)); |
| 453 | return -1; |
| 454 | } |
| 455 | |
| 456 | int |
| 457 | a2tun(const char *s, int *remote) |
| 458 | { |
| 459 | const char *errstr = NULL((void *)0); |
| 460 | char *sp, *ep; |
| 461 | int tun; |
| 462 | |
| 463 | if (remote != NULL((void *)0)) { |
| 464 | *remote = SSH_TUNID_ANY0x7fffffff; |
| 465 | sp = xstrdup(s); |
| 466 | if ((ep = strchr(sp, ':')) == NULL((void *)0)) { |
| 467 | free(sp); |
| 468 | return (a2tun(s, NULL((void *)0))); |
| 469 | } |
| 470 | ep[0] = '\0'; ep++; |
| 471 | *remote = a2tun(ep, NULL((void *)0)); |
| 472 | tun = a2tun(sp, NULL((void *)0)); |
| 473 | free(sp); |
| 474 | return (*remote == SSH_TUNID_ERR(0x7fffffff - 1) ? *remote : tun); |
| 475 | } |
| 476 | |
| 477 | if (strcasecmp(s, "any") == 0) |
| 478 | return (SSH_TUNID_ANY0x7fffffff); |
| 479 | |
| 480 | tun = strtonum(s, 0, SSH_TUNID_MAX(0x7fffffff - 2), &errstr); |
| 481 | if (errstr != NULL((void *)0)) |
| 482 | return (SSH_TUNID_ERR(0x7fffffff - 1)); |
| 483 | |
| 484 | return (tun); |
| 485 | } |
| 486 | |
| 487 | #define SECONDS1 1 |
| 488 | #define MINUTES(1 * 60) (SECONDS1 * 60) |
| 489 | #define HOURS((1 * 60) * 60) (MINUTES(1 * 60) * 60) |
| 490 | #define DAYS(((1 * 60) * 60) * 24) (HOURS((1 * 60) * 60) * 24) |
| 491 | #define WEEKS((((1 * 60) * 60) * 24) * 7) (DAYS(((1 * 60) * 60) * 24) * 7) |
| 492 | |
| 493 | /* |
| 494 | * Convert a time string into seconds; format is |
| 495 | * a sequence of: |
| 496 | * time[qualifier] |
| 497 | * |
| 498 | * Valid time qualifiers are: |
| 499 | * <none> seconds |
| 500 | * s|S seconds |
| 501 | * m|M minutes |
| 502 | * h|H hours |
| 503 | * d|D days |
| 504 | * w|W weeks |
| 505 | * |
| 506 | * Examples: |
| 507 | * 90m 90 minutes |
| 508 | * 1h30m 90 minutes |
| 509 | * 2d 2 days |
| 510 | * 1w 1 week |
| 511 | * |
| 512 | * Return -1 if time string is invalid. |
| 513 | */ |
| 514 | int |
| 515 | convtime(const char *s) |
| 516 | { |
| 517 | long total, secs, multiplier; |
| 518 | const char *p; |
| 519 | char *endp; |
| 520 | |
| 521 | errno(*__errno()) = 0; |
| 522 | total = 0; |
| 523 | p = s; |
| 524 | |
| 525 | if (p == NULL((void *)0) || *p == '\0') |
| 526 | return -1; |
| 527 | |
| 528 | while (*p) { |
| 529 | secs = strtol(p, &endp, 10); |
| 530 | if (p == endp || |
| 531 | (errno(*__errno()) == ERANGE34 && (secs == INT_MIN(-2147483647 -1) || secs == INT_MAX2147483647)) || |
| 532 | secs < 0) |
| 533 | return -1; |
| 534 | |
| 535 | multiplier = 1; |
| 536 | switch (*endp++) { |
| 537 | case '\0': |
| 538 | endp--; |
| 539 | break; |
| 540 | case 's': |
| 541 | case 'S': |
| 542 | break; |
| 543 | case 'm': |
| 544 | case 'M': |
| 545 | multiplier = MINUTES(1 * 60); |
| 546 | break; |
| 547 | case 'h': |
| 548 | case 'H': |
| 549 | multiplier = HOURS((1 * 60) * 60); |
| 550 | break; |
| 551 | case 'd': |
| 552 | case 'D': |
| 553 | multiplier = DAYS(((1 * 60) * 60) * 24); |
| 554 | break; |
| 555 | case 'w': |
| 556 | case 'W': |
| 557 | multiplier = WEEKS((((1 * 60) * 60) * 24) * 7); |
| 558 | break; |
| 559 | default: |
| 560 | return -1; |
| 561 | } |
| 562 | if (secs > INT_MAX2147483647 / multiplier) |
| 563 | return -1; |
| 564 | secs *= multiplier; |
| 565 | if (total > INT_MAX2147483647 - secs) |
| 566 | return -1; |
| 567 | total += secs; |
| 568 | if (total < 0) |
| 569 | return -1; |
| 570 | p = endp; |
| 571 | } |
| 572 | |
| 573 | return total; |
| 574 | } |
| 575 | |
| 576 | #define TF_BUFS8 8 |
| 577 | #define TF_LEN9 9 |
| 578 | |
| 579 | const char * |
| 580 | fmt_timeframe(time_t t) |
| 581 | { |
| 582 | char *buf; |
| 583 | static char tfbuf[TF_BUFS8][TF_LEN9]; /* ring buffer */ |
| 584 | static int idx = 0; |
| 585 | unsigned int sec, min, hrs, day; |
| 586 | unsigned long long week; |
| 587 | |
| 588 | buf = tfbuf[idx++]; |
| 589 | if (idx == TF_BUFS8) |
| 590 | idx = 0; |
| 591 | |
| 592 | week = t; |
| 593 | |
| 594 | sec = week % 60; |
| 595 | week /= 60; |
| 596 | min = week % 60; |
| 597 | week /= 60; |
| 598 | hrs = week % 24; |
| 599 | week /= 24; |
| 600 | day = week % 7; |
| 601 | week /= 7; |
| 602 | |
| 603 | if (week > 0) |
| 604 | snprintf(buf, TF_LEN9, "%02lluw%01ud%02uh", week, day, hrs); |
| 605 | else if (day > 0) |
| 606 | snprintf(buf, TF_LEN9, "%01ud%02uh%02um", day, hrs, min); |
| 607 | else |
| 608 | snprintf(buf, TF_LEN9, "%02u:%02u:%02u", hrs, min, sec); |
| 609 | |
| 610 | return (buf); |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * Returns a standardized host+port identifier string. |
| 615 | * Caller must free returned string. |
| 616 | */ |
| 617 | char * |
| 618 | put_host_port(const char *host, u_short port) |
| 619 | { |
| 620 | char *hoststr; |
| 621 | |
| 622 | if (port == 0 || port == SSH_DEFAULT_PORT22) |
| 623 | return(xstrdup(host)); |
| 624 | if (asprintf(&hoststr, "[%s]:%d", host, (int)port) == -1) |
| 625 | fatal("put_host_port: asprintf: %s", strerror(errno))sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 625, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "put_host_port: asprintf: %s" , strerror((*__errno()))); |
| 626 | debug3("put_host_port: %s", hoststr)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 626, 0, SYSLOG_LEVEL_DEBUG3, ((void *)0), "put_host_port: %s" , hoststr); |
| 627 | return hoststr; |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | * Search for next delimiter between hostnames/addresses and ports. |
| 632 | * Argument may be modified (for termination). |
| 633 | * Returns *cp if parsing succeeds. |
| 634 | * *cp is set to the start of the next field, if one was found. |
| 635 | * The delimiter char, if present, is stored in delim. |
| 636 | * If this is the last field, *cp is set to NULL. |
| 637 | */ |
| 638 | char * |
| 639 | hpdelim2(char **cp, char *delim) |
| 640 | { |
| 641 | char *s, *old; |
| 642 | |
| 643 | if (cp == NULL((void *)0) || *cp == NULL((void *)0)) |
| 644 | return NULL((void *)0); |
| 645 | |
| 646 | old = s = *cp; |
| 647 | if (*s == '[') { |
| 648 | if ((s = strchr(s, ']')) == NULL((void *)0)) |
| 649 | return NULL((void *)0); |
| 650 | else |
| 651 | s++; |
| 652 | } else if ((s = strpbrk(s, ":/")) == NULL((void *)0)) |
| 653 | s = *cp + strlen(*cp); /* skip to end (see first case below) */ |
| 654 | |
| 655 | switch (*s) { |
| 656 | case '\0': |
| 657 | *cp = NULL((void *)0); /* no more fields*/ |
| 658 | break; |
| 659 | |
| 660 | case ':': |
| 661 | case '/': |
| 662 | if (delim != NULL((void *)0)) |
| 663 | *delim = *s; |
| 664 | *s = '\0'; /* terminate */ |
| 665 | *cp = s + 1; |
| 666 | break; |
| 667 | |
| 668 | default: |
| 669 | return NULL((void *)0); |
| 670 | } |
| 671 | |
| 672 | return old; |
| 673 | } |
| 674 | |
| 675 | char * |
| 676 | hpdelim(char **cp) |
| 677 | { |
| 678 | return hpdelim2(cp, NULL((void *)0)); |
| 679 | } |
| 680 | |
| 681 | char * |
| 682 | cleanhostname(char *host) |
| 683 | { |
| 684 | if (*host == '[' && host[strlen(host) - 1] == ']') { |
| 685 | host[strlen(host) - 1] = '\0'; |
| 686 | return (host + 1); |
| 687 | } else |
| 688 | return host; |
| 689 | } |
| 690 | |
| 691 | char * |
| 692 | colon(char *cp) |
| 693 | { |
| 694 | int flag = 0; |
| 695 | |
| 696 | if (*cp == ':') /* Leading colon is part of file name. */ |
| 697 | return NULL((void *)0); |
| 698 | if (*cp == '[') |
| 699 | flag = 1; |
| 700 | |
| 701 | for (; *cp; ++cp) { |
| 702 | if (*cp == '@' && *(cp+1) == '[') |
| 703 | flag = 1; |
| 704 | if (*cp == ']' && *(cp+1) == ':' && flag) |
| 705 | return (cp+1); |
| 706 | if (*cp == ':' && !flag) |
| 707 | return (cp); |
| 708 | if (*cp == '/') |
| 709 | return NULL((void *)0); |
| 710 | } |
| 711 | return NULL((void *)0); |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * Parse a [user@]host:[path] string. |
| 716 | * Caller must free returned user, host and path. |
| 717 | * Any of the pointer return arguments may be NULL (useful for syntax checking). |
| 718 | * If user was not specified then *userp will be set to NULL. |
| 719 | * If host was not specified then *hostp will be set to NULL. |
| 720 | * If path was not specified then *pathp will be set to ".". |
| 721 | * Returns 0 on success, -1 on failure. |
| 722 | */ |
| 723 | int |
| 724 | parse_user_host_path(const char *s, char **userp, char **hostp, char **pathp) |
| 725 | { |
| 726 | char *user = NULL((void *)0), *host = NULL((void *)0), *path = NULL((void *)0); |
| 727 | char *sdup, *tmp; |
| 728 | int ret = -1; |
| 729 | |
| 730 | if (userp != NULL((void *)0)) |
| 731 | *userp = NULL((void *)0); |
| 732 | if (hostp != NULL((void *)0)) |
| 733 | *hostp = NULL((void *)0); |
| 734 | if (pathp != NULL((void *)0)) |
| 735 | *pathp = NULL((void *)0); |
| 736 | |
| 737 | sdup = xstrdup(s); |
| 738 | |
| 739 | /* Check for remote syntax: [user@]host:[path] */ |
| 740 | if ((tmp = colon(sdup)) == NULL((void *)0)) |
| 741 | goto out; |
| 742 | |
| 743 | /* Extract optional path */ |
| 744 | *tmp++ = '\0'; |
| 745 | if (*tmp == '\0') |
| 746 | tmp = "."; |
| 747 | path = xstrdup(tmp); |
| 748 | |
| 749 | /* Extract optional user and mandatory host */ |
| 750 | tmp = strrchr(sdup, '@'); |
| 751 | if (tmp != NULL((void *)0)) { |
| 752 | *tmp++ = '\0'; |
| 753 | host = xstrdup(cleanhostname(tmp)); |
| 754 | if (*sdup != '\0') |
| 755 | user = xstrdup(sdup); |
| 756 | } else { |
| 757 | host = xstrdup(cleanhostname(sdup)); |
| 758 | user = NULL((void *)0); |
| 759 | } |
| 760 | |
| 761 | /* Success */ |
| 762 | if (userp != NULL((void *)0)) { |
| 763 | *userp = user; |
| 764 | user = NULL((void *)0); |
| 765 | } |
| 766 | if (hostp != NULL((void *)0)) { |
| 767 | *hostp = host; |
| 768 | host = NULL((void *)0); |
| 769 | } |
| 770 | if (pathp != NULL((void *)0)) { |
| 771 | *pathp = path; |
| 772 | path = NULL((void *)0); |
| 773 | } |
| 774 | ret = 0; |
| 775 | out: |
| 776 | free(sdup); |
| 777 | free(user); |
| 778 | free(host); |
| 779 | free(path); |
| 780 | return ret; |
| 781 | } |
| 782 | |
| 783 | /* |
| 784 | * Parse a [user@]host[:port] string. |
| 785 | * Caller must free returned user and host. |
| 786 | * Any of the pointer return arguments may be NULL (useful for syntax checking). |
| 787 | * If user was not specified then *userp will be set to NULL. |
| 788 | * If port was not specified then *portp will be -1. |
| 789 | * Returns 0 on success, -1 on failure. |
| 790 | */ |
| 791 | int |
| 792 | parse_user_host_port(const char *s, char **userp, char **hostp, int *portp) |
| 793 | { |
| 794 | char *sdup, *cp, *tmp; |
| 795 | char *user = NULL((void *)0), *host = NULL((void *)0); |
| 796 | int port = -1, ret = -1; |
| 797 | |
| 798 | if (userp != NULL((void *)0)) |
| 799 | *userp = NULL((void *)0); |
| 800 | if (hostp != NULL((void *)0)) |
| 801 | *hostp = NULL((void *)0); |
| 802 | if (portp != NULL((void *)0)) |
| 803 | *portp = -1; |
| 804 | |
| 805 | if ((sdup = tmp = strdup(s)) == NULL((void *)0)) |
| 806 | return -1; |
| 807 | /* Extract optional username */ |
| 808 | if ((cp = strrchr(tmp, '@')) != NULL((void *)0)) { |
| 809 | *cp = '\0'; |
| 810 | if (*tmp == '\0') |
| 811 | goto out; |
| 812 | if ((user = strdup(tmp)) == NULL((void *)0)) |
| 813 | goto out; |
| 814 | tmp = cp + 1; |
| 815 | } |
| 816 | /* Extract mandatory hostname */ |
| 817 | if ((cp = hpdelim(&tmp)) == NULL((void *)0) || *cp == '\0') |
| 818 | goto out; |
| 819 | host = xstrdup(cleanhostname(cp)); |
| 820 | /* Convert and verify optional port */ |
| 821 | if (tmp != NULL((void *)0) && *tmp != '\0') { |
| 822 | if ((port = a2port(tmp)) <= 0) |
| 823 | goto out; |
| 824 | } |
| 825 | /* Success */ |
| 826 | if (userp != NULL((void *)0)) { |
| 827 | *userp = user; |
| 828 | user = NULL((void *)0); |
| 829 | } |
| 830 | if (hostp != NULL((void *)0)) { |
| 831 | *hostp = host; |
| 832 | host = NULL((void *)0); |
| 833 | } |
| 834 | if (portp != NULL((void *)0)) |
| 835 | *portp = port; |
| 836 | ret = 0; |
| 837 | out: |
| 838 | free(sdup); |
| 839 | free(user); |
| 840 | free(host); |
| 841 | return ret; |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * Converts a two-byte hex string to decimal. |
| 846 | * Returns the decimal value or -1 for invalid input. |
| 847 | */ |
| 848 | static int |
| 849 | hexchar(const char *s) |
| 850 | { |
| 851 | unsigned char result[2]; |
| 852 | int i; |
| 853 | |
| 854 | for (i = 0; i < 2; i++) { |
| 855 | if (s[i] >= '0' && s[i] <= '9') |
| 856 | result[i] = (unsigned char)(s[i] - '0'); |
| 857 | else if (s[i] >= 'a' && s[i] <= 'f') |
| 858 | result[i] = (unsigned char)(s[i] - 'a') + 10; |
| 859 | else if (s[i] >= 'A' && s[i] <= 'F') |
| 860 | result[i] = (unsigned char)(s[i] - 'A') + 10; |
| 861 | else |
| 862 | return -1; |
| 863 | } |
| 864 | return (result[0] << 4) | result[1]; |
| 865 | } |
| 866 | |
| 867 | /* |
| 868 | * Decode an url-encoded string. |
| 869 | * Returns a newly allocated string on success or NULL on failure. |
| 870 | */ |
| 871 | static char * |
| 872 | urldecode(const char *src) |
| 873 | { |
| 874 | char *ret, *dst; |
| 875 | int ch; |
| 876 | |
| 877 | ret = xmalloc(strlen(src) + 1); |
| 878 | for (dst = ret; *src != '\0'; src++) { |
| 879 | switch (*src) { |
| 880 | case '+': |
| 881 | *dst++ = ' '; |
| 882 | break; |
| 883 | case '%': |
| 884 | if (!isxdigit((unsigned char)src[1]) || |
| 885 | !isxdigit((unsigned char)src[2]) || |
| 886 | (ch = hexchar(src + 1)) == -1) { |
| 887 | free(ret); |
| 888 | return NULL((void *)0); |
| 889 | } |
| 890 | *dst++ = ch; |
| 891 | src += 2; |
| 892 | break; |
| 893 | default: |
| 894 | *dst++ = *src; |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | *dst = '\0'; |
| 899 | |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * Parse an (scp|ssh|sftp)://[user@]host[:port][/path] URI. |
| 905 | * See https://tools.ietf.org/html/draft-ietf-secsh-scp-sftp-ssh-uri-04 |
| 906 | * Either user or path may be url-encoded (but not host or port). |
| 907 | * Caller must free returned user, host and path. |
| 908 | * Any of the pointer return arguments may be NULL (useful for syntax checking) |
| 909 | * but the scheme must always be specified. |
| 910 | * If user was not specified then *userp will be set to NULL. |
| 911 | * If port was not specified then *portp will be -1. |
| 912 | * If path was not specified then *pathp will be set to NULL. |
| 913 | * Returns 0 on success, 1 if non-uri/wrong scheme, -1 on error/invalid uri. |
| 914 | */ |
| 915 | int |
| 916 | parse_uri(const char *scheme, const char *uri, char **userp, char **hostp, |
| 917 | int *portp, char **pathp) |
| 918 | { |
| 919 | char *uridup, *cp, *tmp, ch; |
| 920 | char *user = NULL((void *)0), *host = NULL((void *)0), *path = NULL((void *)0); |
| 921 | int port = -1, ret = -1; |
| 922 | size_t len; |
| 923 | |
| 924 | len = strlen(scheme); |
| 925 | if (strncmp(uri, scheme, len) != 0 || strncmp(uri + len, "://", 3) != 0) |
| 926 | return 1; |
| 927 | uri += len + 3; |
| 928 | |
| 929 | if (userp != NULL((void *)0)) |
| 930 | *userp = NULL((void *)0); |
| 931 | if (hostp != NULL((void *)0)) |
| 932 | *hostp = NULL((void *)0); |
| 933 | if (portp != NULL((void *)0)) |
| 934 | *portp = -1; |
| 935 | if (pathp != NULL((void *)0)) |
| 936 | *pathp = NULL((void *)0); |
| 937 | |
| 938 | uridup = tmp = xstrdup(uri); |
| 939 | |
| 940 | /* Extract optional ssh-info (username + connection params) */ |
| 941 | if ((cp = strchr(tmp, '@')) != NULL((void *)0)) { |
| 942 | char *delim; |
| 943 | |
| 944 | *cp = '\0'; |
| 945 | /* Extract username and connection params */ |
| 946 | if ((delim = strchr(tmp, ';')) != NULL((void *)0)) { |
| 947 | /* Just ignore connection params for now */ |
| 948 | *delim = '\0'; |
| 949 | } |
| 950 | if (*tmp == '\0') { |
| 951 | /* Empty username */ |
| 952 | goto out; |
| 953 | } |
| 954 | if ((user = urldecode(tmp)) == NULL((void *)0)) |
| 955 | goto out; |
| 956 | tmp = cp + 1; |
| 957 | } |
| 958 | |
| 959 | /* Extract mandatory hostname */ |
| 960 | if ((cp = hpdelim2(&tmp, &ch)) == NULL((void *)0) || *cp == '\0') |
| 961 | goto out; |
| 962 | host = xstrdup(cleanhostname(cp)); |
| 963 | if (!valid_domain(host, 0, NULL((void *)0))) |
| 964 | goto out; |
| 965 | |
| 966 | if (tmp != NULL((void *)0) && *tmp != '\0') { |
| 967 | if (ch == ':') { |
| 968 | /* Convert and verify port. */ |
| 969 | if ((cp = strchr(tmp, '/')) != NULL((void *)0)) |
| 970 | *cp = '\0'; |
| 971 | if ((port = a2port(tmp)) <= 0) |
| 972 | goto out; |
| 973 | tmp = cp ? cp + 1 : NULL((void *)0); |
| 974 | } |
| 975 | if (tmp != NULL((void *)0) && *tmp != '\0') { |
| 976 | /* Extract optional path */ |
| 977 | if ((path = urldecode(tmp)) == NULL((void *)0)) |
| 978 | goto out; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | /* Success */ |
| 983 | if (userp != NULL((void *)0)) { |
| 984 | *userp = user; |
| 985 | user = NULL((void *)0); |
| 986 | } |
| 987 | if (hostp != NULL((void *)0)) { |
| 988 | *hostp = host; |
| 989 | host = NULL((void *)0); |
| 990 | } |
| 991 | if (portp != NULL((void *)0)) |
| 992 | *portp = port; |
| 993 | if (pathp != NULL((void *)0)) { |
| 994 | *pathp = path; |
| 995 | path = NULL((void *)0); |
| 996 | } |
| 997 | ret = 0; |
| 998 | out: |
| 999 | free(uridup); |
| 1000 | free(user); |
| 1001 | free(host); |
| 1002 | free(path); |
| 1003 | return ret; |
| 1004 | } |
| 1005 | |
| 1006 | /* function to assist building execv() arguments */ |
| 1007 | void |
| 1008 | addargs(arglist *args, char *fmt, ...) |
| 1009 | { |
| 1010 | va_list ap; |
| 1011 | char *cp; |
| 1012 | u_int nalloc; |
| 1013 | int r; |
| 1014 | |
| 1015 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1016 | r = vasprintf(&cp, fmt, ap); |
| 1017 | va_end(ap)__builtin_va_end(ap); |
| 1018 | if (r == -1) |
| 1019 | fatal("addargs: argument too long")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1019, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "addargs: argument too long" ); |
| 1020 | |
| 1021 | nalloc = args->nalloc; |
| 1022 | if (args->list == NULL((void *)0)) { |
| 1023 | nalloc = 32; |
| 1024 | args->num = 0; |
| 1025 | } else if (args->num+2 >= nalloc) |
| 1026 | nalloc *= 2; |
| 1027 | |
| 1028 | args->list = xrecallocarray(args->list, args->nalloc, nalloc, sizeof(char *)); |
| 1029 | args->nalloc = nalloc; |
| 1030 | args->list[args->num++] = cp; |
| 1031 | args->list[args->num] = NULL((void *)0); |
| 1032 | } |
| 1033 | |
| 1034 | void |
| 1035 | replacearg(arglist *args, u_int which, char *fmt, ...) |
| 1036 | { |
| 1037 | va_list ap; |
| 1038 | char *cp; |
| 1039 | int r; |
| 1040 | |
| 1041 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1042 | r = vasprintf(&cp, fmt, ap); |
| 1043 | va_end(ap)__builtin_va_end(ap); |
| 1044 | if (r == -1) |
| 1045 | fatal("replacearg: argument too long")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1045, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "replacearg: argument too long" ); |
| 1046 | |
| 1047 | if (which >= args->num) |
| 1048 | fatal("replacearg: tried to replace invalid arg %d >= %d",sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1049, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "replacearg: tried to replace invalid arg %d >= %d" , which, args->num) |
| 1049 | which, args->num)sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1049, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "replacearg: tried to replace invalid arg %d >= %d" , which, args->num); |
| 1050 | free(args->list[which]); |
| 1051 | args->list[which] = cp; |
| 1052 | } |
| 1053 | |
| 1054 | void |
| 1055 | freeargs(arglist *args) |
| 1056 | { |
| 1057 | u_int i; |
| 1058 | |
| 1059 | if (args->list != NULL((void *)0)) { |
| 1060 | for (i = 0; i < args->num; i++) |
| 1061 | free(args->list[i]); |
| 1062 | free(args->list); |
| 1063 | args->nalloc = args->num = 0; |
| 1064 | args->list = NULL((void *)0); |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | /* |
| 1069 | * Expands tildes in the file name. Returns data allocated by xmalloc. |
| 1070 | * Warning: this calls getpw*. |
| 1071 | */ |
| 1072 | int |
| 1073 | tilde_expand(const char *filename, uid_t uid, char **retp) |
| 1074 | { |
| 1075 | char *ocopy = NULL((void *)0), *copy, *s = NULL((void *)0); |
| 1076 | const char *path = NULL((void *)0), *user = NULL((void *)0); |
| 1077 | struct passwd *pw; |
| 1078 | size_t len; |
| 1079 | int ret = -1, r, slash; |
| 1080 | |
| 1081 | *retp = NULL((void *)0); |
| 1082 | if (*filename != '~') { |
| 1083 | *retp = xstrdup(filename); |
| 1084 | return 0; |
| 1085 | } |
| 1086 | ocopy = copy = xstrdup(filename + 1); |
| 1087 | |
| 1088 | if (*copy == '\0') /* ~ */ |
| 1089 | path = NULL((void *)0); |
| 1090 | else if (*copy == '/') { |
| 1091 | copy += strspn(copy, "/"); |
| 1092 | if (*copy == '\0') |
| 1093 | path = NULL((void *)0); /* ~/ */ |
| 1094 | else |
| 1095 | path = copy; /* ~/path */ |
| 1096 | } else { |
| 1097 | user = copy; |
| 1098 | if ((path = strchr(copy, '/')) != NULL((void *)0)) { |
| 1099 | copy[path - copy] = '\0'; |
| 1100 | path++; |
| 1101 | path += strspn(path, "/"); |
| 1102 | if (*path == '\0') /* ~user/ */ |
| 1103 | path = NULL((void *)0); |
| 1104 | /* else ~user/path */ |
| 1105 | } |
| 1106 | /* else ~user */ |
| 1107 | } |
| 1108 | if (user != NULL((void *)0)) { |
| 1109 | if ((pw = getpwnam(user)) == NULL((void *)0)) { |
| 1110 | error_f("No such user %s", user)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1110, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "No such user %s" , user); |
| 1111 | goto out; |
| 1112 | } |
| 1113 | } else if ((pw = getpwuid(uid)) == NULL((void *)0)) { |
| 1114 | error_f("No such uid %ld", (long)uid)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1114, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "No such uid %ld" , (long)uid); |
| 1115 | goto out; |
| 1116 | } |
| 1117 | |
| 1118 | /* Make sure directory has a trailing '/' */ |
| 1119 | slash = (len = strlen(pw->pw_dir)) == 0 || pw->pw_dir[len - 1] != '/'; |
| 1120 | |
| 1121 | if ((r = xasprintf(&s, "%s%s%s", pw->pw_dir, |
| 1122 | slash ? "/" : "", path != NULL((void *)0) ? path : "")) <= 0) { |
| 1123 | error_f("xasprintf failed")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1123, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "xasprintf failed" ); |
| 1124 | goto out; |
| 1125 | } |
| 1126 | if (r >= PATH_MAX1024) { |
| 1127 | error_f("Path too long")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1127, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "Path too long"); |
| 1128 | goto out; |
| 1129 | } |
| 1130 | /* success */ |
| 1131 | ret = 0; |
| 1132 | *retp = s; |
| 1133 | s = NULL((void *)0); |
| 1134 | out: |
| 1135 | free(s); |
| 1136 | free(ocopy); |
| 1137 | return ret; |
| 1138 | } |
| 1139 | |
| 1140 | char * |
| 1141 | tilde_expand_filename(const char *filename, uid_t uid) |
| 1142 | { |
| 1143 | char *ret; |
| 1144 | |
| 1145 | if (tilde_expand(filename, uid, &ret) != 0) |
| 1146 | cleanup_exit(255); |
| 1147 | return ret; |
| 1148 | } |
| 1149 | |
| 1150 | /* |
| 1151 | * Expand a string with a set of %[char] escapes and/or ${ENVIRONMENT} |
| 1152 | * substitutions. A number of escapes may be specified as |
| 1153 | * (char *escape_chars, char *replacement) pairs. The list must be terminated |
| 1154 | * by a NULL escape_char. Returns replaced string in memory allocated by |
| 1155 | * xmalloc which the caller must free. |
| 1156 | */ |
| 1157 | static char * |
| 1158 | vdollar_percent_expand(int *parseerror, int dollar, int percent, |
| 1159 | const char *string, va_list ap) |
| 1160 | { |
| 1161 | #define EXPAND_MAX_KEYS 16 |
| 1162 | u_int num_keys = 0, i; |
| 1163 | struct { |
| 1164 | const char *key; |
| 1165 | const char *repl; |
| 1166 | } keys[EXPAND_MAX_KEYS]; |
| 1167 | struct sshbuf *buf; |
| 1168 | int r, missingvar = 0; |
| 1169 | char *ret = NULL((void *)0), *var, *varend, *val; |
| 1170 | size_t len; |
| 1171 | |
| 1172 | if ((buf = sshbuf_new()) == NULL((void *)0)) |
| 1173 | fatal_f("sshbuf_new failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1173, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "sshbuf_new failed" ); |
| 1174 | if (parseerror == NULL((void *)0)) |
| 1175 | fatal_f("null parseerror arg")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1175, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "null parseerror arg" ); |
| 1176 | *parseerror = 1; |
| 1177 | |
| 1178 | /* Gather keys if we're doing percent expansion. */ |
| 1179 | if (percent) { |
| 1180 | for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) { |
| 1181 | keys[num_keys].key = va_arg(ap, char *)__builtin_va_arg(ap, char *); |
| 1182 | if (keys[num_keys].key == NULL((void *)0)) |
| 1183 | break; |
| 1184 | keys[num_keys].repl = va_arg(ap, char *)__builtin_va_arg(ap, char *); |
| 1185 | if (keys[num_keys].repl == NULL((void *)0)) { |
| 1186 | fatal_f("NULL replacement for token %s",sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1187, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "NULL replacement for token %s" , keys[num_keys].key) |
| 1187 | keys[num_keys].key)sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1187, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "NULL replacement for token %s" , keys[num_keys].key); |
| 1188 | } |
| 1189 | } |
| 1190 | if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, char *)__builtin_va_arg(ap, char *) != NULL((void *)0)) |
| 1191 | fatal_f("too many keys")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1191, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "too many keys"); |
| 1192 | if (num_keys == 0) |
| 1193 | fatal_f("percent expansion without token list")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1193, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "percent expansion without token list" ); |
| 1194 | } |
| 1195 | |
| 1196 | /* Expand string */ |
| 1197 | for (i = 0; *string != '\0'; string++) { |
Value stored to 'i' is never read | |
| 1198 | /* Optionally process ${ENVIRONMENT} expansions. */ |
| 1199 | if (dollar && string[0] == '$' && string[1] == '{') { |
| 1200 | string += 2; /* skip over '${' */ |
| 1201 | if ((varend = strchr(string, '}')) == NULL((void *)0)) { |
| 1202 | error_f("environment variable '%s' missing "sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1203, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "environment variable '%s' missing " "closing '}'", string) |
| 1203 | "closing '}'", string)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1203, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "environment variable '%s' missing " "closing '}'", string); |
| 1204 | goto out; |
| 1205 | } |
| 1206 | len = varend - string; |
| 1207 | if (len == 0) { |
| 1208 | error_f("zero-length environment variable")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1208, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "zero-length environment variable" ); |
| 1209 | goto out; |
| 1210 | } |
| 1211 | var = xmalloc(len + 1); |
| 1212 | (void)strlcpy(var, string, len + 1); |
| 1213 | if ((val = getenv(var)) == NULL((void *)0)) { |
| 1214 | error_f("env var ${%s} has no value", var)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1214, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "env var ${%s} has no value" , var); |
| 1215 | missingvar = 1; |
| 1216 | } else { |
| 1217 | debug3_f("expand ${%s} -> '%s'", var, val)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1217, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "expand ${%s} -> '%s'" , var, val); |
| 1218 | if ((r = sshbuf_put(buf, val, strlen(val))) !=0) |
| 1219 | fatal_fr(r, "sshbuf_put ${}")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1219, 1, SYSLOG_LEVEL_FATAL, ssh_err(r), "sshbuf_put ${}"); |
| 1220 | } |
| 1221 | free(var); |
| 1222 | string += len; |
| 1223 | continue; |
| 1224 | } |
| 1225 | |
| 1226 | /* |
| 1227 | * Process percent expansions if we have a list of TOKENs. |
| 1228 | * If we're not doing percent expansion everything just gets |
| 1229 | * appended here. |
| 1230 | */ |
| 1231 | if (*string != '%' || !percent) { |
| 1232 | append: |
| 1233 | if ((r = sshbuf_put_u8(buf, *string)) != 0) |
| 1234 | fatal_fr(r, "sshbuf_put_u8 %%")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1234, 1, SYSLOG_LEVEL_FATAL, ssh_err(r), "sshbuf_put_u8 %%" ); |
| 1235 | continue; |
| 1236 | } |
| 1237 | string++; |
| 1238 | /* %% case */ |
| 1239 | if (*string == '%') |
| 1240 | goto append; |
| 1241 | if (*string == '\0') { |
| 1242 | error_f("invalid format")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1242, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "invalid format"); |
| 1243 | goto out; |
| 1244 | } |
| 1245 | for (i = 0; i < num_keys; i++) { |
| 1246 | if (strchr(keys[i].key, *string) != NULL((void *)0)) { |
| 1247 | if ((r = sshbuf_put(buf, keys[i].repl, |
| 1248 | strlen(keys[i].repl))) != 0) |
| 1249 | fatal_fr(r, "sshbuf_put %%-repl")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1249, 1, SYSLOG_LEVEL_FATAL, ssh_err(r), "sshbuf_put %%-repl" ); |
| 1250 | break; |
| 1251 | } |
| 1252 | } |
| 1253 | if (i >= num_keys) { |
| 1254 | error_f("unknown key %%%c", *string)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1254, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "unknown key %%%c" , *string); |
| 1255 | goto out; |
| 1256 | } |
| 1257 | } |
| 1258 | if (!missingvar && (ret = sshbuf_dup_string(buf)) == NULL((void *)0)) |
| 1259 | fatal_f("sshbuf_dup_string failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1259, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "sshbuf_dup_string failed" ); |
| 1260 | *parseerror = 0; |
| 1261 | out: |
| 1262 | sshbuf_free(buf); |
| 1263 | return *parseerror ? NULL((void *)0) : ret; |
| 1264 | #undef EXPAND_MAX_KEYS |
| 1265 | } |
| 1266 | |
| 1267 | /* |
| 1268 | * Expand only environment variables. |
| 1269 | * Note that although this function is variadic like the other similar |
| 1270 | * functions, any such arguments will be unused. |
| 1271 | */ |
| 1272 | |
| 1273 | char * |
| 1274 | dollar_expand(int *parseerr, const char *string, ...) |
| 1275 | { |
| 1276 | char *ret; |
| 1277 | int err; |
| 1278 | va_list ap; |
| 1279 | |
| 1280 | va_start(ap, string)__builtin_va_start(ap, string); |
| 1281 | ret = vdollar_percent_expand(&err, 1, 0, string, ap); |
| 1282 | va_end(ap)__builtin_va_end(ap); |
| 1283 | if (parseerr != NULL((void *)0)) |
| 1284 | *parseerr = err; |
| 1285 | return ret; |
| 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * Returns expanded string or NULL if a specified environment variable is |
| 1290 | * not defined, or calls fatal if the string is invalid. |
| 1291 | */ |
| 1292 | char * |
| 1293 | percent_expand(const char *string, ...) |
| 1294 | { |
| 1295 | char *ret; |
| 1296 | int err; |
| 1297 | va_list ap; |
| 1298 | |
| 1299 | va_start(ap, string)__builtin_va_start(ap, string); |
| 1300 | ret = vdollar_percent_expand(&err, 0, 1, string, ap); |
| 1301 | va_end(ap)__builtin_va_end(ap); |
| 1302 | if (err) |
| 1303 | fatal_f("failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1303, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "failed"); |
| 1304 | return ret; |
| 1305 | } |
| 1306 | |
| 1307 | /* |
| 1308 | * Returns expanded string or NULL if a specified environment variable is |
| 1309 | * not defined, or calls fatal if the string is invalid. |
| 1310 | */ |
| 1311 | char * |
| 1312 | percent_dollar_expand(const char *string, ...) |
| 1313 | { |
| 1314 | char *ret; |
| 1315 | int err; |
| 1316 | va_list ap; |
| 1317 | |
| 1318 | va_start(ap, string)__builtin_va_start(ap, string); |
| 1319 | ret = vdollar_percent_expand(&err, 1, 1, string, ap); |
| 1320 | va_end(ap)__builtin_va_end(ap); |
| 1321 | if (err) |
| 1322 | fatal_f("failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1322, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "failed"); |
| 1323 | return ret; |
| 1324 | } |
| 1325 | |
| 1326 | int |
| 1327 | tun_open(int tun, int mode, char **ifname) |
| 1328 | { |
| 1329 | struct ifreq ifr; |
| 1330 | char name[100]; |
| 1331 | int fd = -1, sock; |
| 1332 | const char *tunbase = "tun"; |
| 1333 | |
| 1334 | if (ifname != NULL((void *)0)) |
| 1335 | *ifname = NULL((void *)0); |
| 1336 | |
| 1337 | if (mode == SSH_TUNMODE_ETHERNET0x02) |
| 1338 | tunbase = "tap"; |
| 1339 | |
| 1340 | /* Open the tunnel device */ |
| 1341 | if (tun <= SSH_TUNID_MAX(0x7fffffff - 2)) { |
| 1342 | snprintf(name, sizeof(name), "/dev/%s%d", tunbase, tun); |
| 1343 | fd = open(name, O_RDWR0x0002); |
| 1344 | } else if (tun == SSH_TUNID_ANY0x7fffffff) { |
| 1345 | for (tun = 100; tun >= 0; tun--) { |
| 1346 | snprintf(name, sizeof(name), "/dev/%s%d", |
| 1347 | tunbase, tun); |
| 1348 | if ((fd = open(name, O_RDWR0x0002)) >= 0) |
| 1349 | break; |
| 1350 | } |
| 1351 | } else { |
| 1352 | debug_f("invalid tunnel %u", tun)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1352, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "invalid tunnel %u" , tun); |
| 1353 | return -1; |
| 1354 | } |
| 1355 | |
| 1356 | if (fd == -1) { |
| 1357 | debug_f("%s open: %s", name, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1357, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "%s open: %s", name , strerror((*__errno()))); |
| 1358 | return -1; |
| 1359 | } |
| 1360 | |
| 1361 | debug_f("%s mode %d fd %d", name, mode, fd)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1361, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "%s mode %d fd %d" , name, mode, fd); |
| 1362 | |
| 1363 | /* Bring interface up if it is not already */ |
| 1364 | snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", tunbase, tun); |
| 1365 | if ((sock = socket(PF_UNIX1, SOCK_STREAM1, 0)) == -1) |
| 1366 | goto failed; |
| 1367 | |
| 1368 | if (ioctl(sock, SIOCGIFFLAGS(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((17))), &ifr) == -1) { |
| 1369 | debug_f("get interface %s flags: %s", ifr.ifr_name,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1370, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "get interface %s flags: %s" , ifr.ifr_name, strerror((*__errno()))) |
| 1370 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1370, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "get interface %s flags: %s" , ifr.ifr_name, strerror((*__errno()))); |
| 1371 | goto failed; |
| 1372 | } |
| 1373 | |
| 1374 | if (!(ifr.ifr_flagsifr_ifru.ifru_flags & IFF_UP0x1)) { |
| 1375 | ifr.ifr_flagsifr_ifru.ifru_flags |= IFF_UP0x1; |
| 1376 | if (ioctl(sock, SIOCSIFFLAGS((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((16))), &ifr) == -1) { |
| 1377 | debug_f("activate interface %s: %s", ifr.ifr_name,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1378, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "activate interface %s: %s" , ifr.ifr_name, strerror((*__errno()))) |
| 1378 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1378, 1, SYSLOG_LEVEL_DEBUG1, ((void *)0), "activate interface %s: %s" , ifr.ifr_name, strerror((*__errno()))); |
| 1379 | goto failed; |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | if (ifname != NULL((void *)0)) |
| 1384 | *ifname = xstrdup(ifr.ifr_name); |
| 1385 | |
| 1386 | close(sock); |
| 1387 | return fd; |
| 1388 | |
| 1389 | failed: |
| 1390 | if (fd >= 0) |
| 1391 | close(fd); |
| 1392 | if (sock >= 0) |
| 1393 | close(sock); |
| 1394 | return -1; |
| 1395 | } |
| 1396 | |
| 1397 | void |
| 1398 | sanitise_stdfd(void) |
| 1399 | { |
| 1400 | int nullfd, dupfd; |
| 1401 | |
| 1402 | if ((nullfd = dupfd = open(_PATH_DEVNULL"/dev/null", O_RDWR0x0002)) == -1) { |
| 1403 | fprintf(stderr(&__sF[2]), "Couldn't open /dev/null: %s\n", |
| 1404 | strerror(errno(*__errno()))); |
| 1405 | exit(1); |
| 1406 | } |
| 1407 | while (++dupfd <= STDERR_FILENO2) { |
| 1408 | /* Only populate closed fds. */ |
| 1409 | if (fcntl(dupfd, F_GETFL3) == -1 && errno(*__errno()) == EBADF9) { |
| 1410 | if (dup2(nullfd, dupfd) == -1) { |
| 1411 | fprintf(stderr(&__sF[2]), "dup2: %s\n", strerror(errno(*__errno()))); |
| 1412 | exit(1); |
| 1413 | } |
| 1414 | } |
| 1415 | } |
| 1416 | if (nullfd > STDERR_FILENO2) |
| 1417 | close(nullfd); |
| 1418 | } |
| 1419 | |
| 1420 | char * |
| 1421 | tohex(const void *vp, size_t l) |
| 1422 | { |
| 1423 | const u_char *p = (const u_char *)vp; |
| 1424 | char b[3], *r; |
| 1425 | size_t i, hl; |
| 1426 | |
| 1427 | if (l > 65536) |
| 1428 | return xstrdup("tohex: length > 65536"); |
| 1429 | |
| 1430 | hl = l * 2 + 1; |
| 1431 | r = xcalloc(1, hl); |
| 1432 | for (i = 0; i < l; i++) { |
| 1433 | snprintf(b, sizeof(b), "%02x", p[i]); |
| 1434 | strlcat(r, b, hl); |
| 1435 | } |
| 1436 | return (r); |
| 1437 | } |
| 1438 | |
| 1439 | /* |
| 1440 | * Extend string *sp by the specified format. If *sp is not NULL (or empty), |
| 1441 | * then the separator 'sep' will be prepended before the formatted arguments. |
| 1442 | * Extended strings are heap allocated. |
| 1443 | */ |
| 1444 | void |
| 1445 | xextendf(char **sp, const char *sep, const char *fmt, ...) |
| 1446 | { |
| 1447 | va_list ap; |
| 1448 | char *tmp1, *tmp2; |
| 1449 | |
| 1450 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 1451 | xvasprintf(&tmp1, fmt, ap); |
| 1452 | va_end(ap)__builtin_va_end(ap); |
| 1453 | |
| 1454 | if (*sp == NULL((void *)0) || **sp == '\0') { |
| 1455 | free(*sp); |
| 1456 | *sp = tmp1; |
| 1457 | return; |
| 1458 | } |
| 1459 | xasprintf(&tmp2, "%s%s%s", *sp, sep == NULL((void *)0) ? "" : sep, tmp1); |
| 1460 | free(tmp1); |
| 1461 | free(*sp); |
| 1462 | *sp = tmp2; |
| 1463 | } |
| 1464 | |
| 1465 | |
| 1466 | u_int64_t |
| 1467 | get_u64(const void *vp) |
| 1468 | { |
| 1469 | const u_char *p = (const u_char *)vp; |
| 1470 | u_int64_t v; |
| 1471 | |
| 1472 | v = (u_int64_t)p[0] << 56; |
| 1473 | v |= (u_int64_t)p[1] << 48; |
| 1474 | v |= (u_int64_t)p[2] << 40; |
| 1475 | v |= (u_int64_t)p[3] << 32; |
| 1476 | v |= (u_int64_t)p[4] << 24; |
| 1477 | v |= (u_int64_t)p[5] << 16; |
| 1478 | v |= (u_int64_t)p[6] << 8; |
| 1479 | v |= (u_int64_t)p[7]; |
| 1480 | |
| 1481 | return (v); |
| 1482 | } |
| 1483 | |
| 1484 | u_int32_t |
| 1485 | get_u32(const void *vp) |
| 1486 | { |
| 1487 | const u_char *p = (const u_char *)vp; |
| 1488 | u_int32_t v; |
| 1489 | |
| 1490 | v = (u_int32_t)p[0] << 24; |
| 1491 | v |= (u_int32_t)p[1] << 16; |
| 1492 | v |= (u_int32_t)p[2] << 8; |
| 1493 | v |= (u_int32_t)p[3]; |
| 1494 | |
| 1495 | return (v); |
| 1496 | } |
| 1497 | |
| 1498 | u_int32_t |
| 1499 | get_u32_le(const void *vp) |
| 1500 | { |
| 1501 | const u_char *p = (const u_char *)vp; |
| 1502 | u_int32_t v; |
| 1503 | |
| 1504 | v = (u_int32_t)p[0]; |
| 1505 | v |= (u_int32_t)p[1] << 8; |
| 1506 | v |= (u_int32_t)p[2] << 16; |
| 1507 | v |= (u_int32_t)p[3] << 24; |
| 1508 | |
| 1509 | return (v); |
| 1510 | } |
| 1511 | |
| 1512 | u_int16_t |
| 1513 | get_u16(const void *vp) |
| 1514 | { |
| 1515 | const u_char *p = (const u_char *)vp; |
| 1516 | u_int16_t v; |
| 1517 | |
| 1518 | v = (u_int16_t)p[0] << 8; |
| 1519 | v |= (u_int16_t)p[1]; |
| 1520 | |
| 1521 | return (v); |
| 1522 | } |
| 1523 | |
| 1524 | void |
| 1525 | put_u64(void *vp, u_int64_t v) |
| 1526 | { |
| 1527 | u_char *p = (u_char *)vp; |
| 1528 | |
| 1529 | p[0] = (u_char)(v >> 56) & 0xff; |
| 1530 | p[1] = (u_char)(v >> 48) & 0xff; |
| 1531 | p[2] = (u_char)(v >> 40) & 0xff; |
| 1532 | p[3] = (u_char)(v >> 32) & 0xff; |
| 1533 | p[4] = (u_char)(v >> 24) & 0xff; |
| 1534 | p[5] = (u_char)(v >> 16) & 0xff; |
| 1535 | p[6] = (u_char)(v >> 8) & 0xff; |
| 1536 | p[7] = (u_char)v & 0xff; |
| 1537 | } |
| 1538 | |
| 1539 | void |
| 1540 | put_u32(void *vp, u_int32_t v) |
| 1541 | { |
| 1542 | u_char *p = (u_char *)vp; |
| 1543 | |
| 1544 | p[0] = (u_char)(v >> 24) & 0xff; |
| 1545 | p[1] = (u_char)(v >> 16) & 0xff; |
| 1546 | p[2] = (u_char)(v >> 8) & 0xff; |
| 1547 | p[3] = (u_char)v & 0xff; |
| 1548 | } |
| 1549 | |
| 1550 | void |
| 1551 | put_u32_le(void *vp, u_int32_t v) |
| 1552 | { |
| 1553 | u_char *p = (u_char *)vp; |
| 1554 | |
| 1555 | p[0] = (u_char)v & 0xff; |
| 1556 | p[1] = (u_char)(v >> 8) & 0xff; |
| 1557 | p[2] = (u_char)(v >> 16) & 0xff; |
| 1558 | p[3] = (u_char)(v >> 24) & 0xff; |
| 1559 | } |
| 1560 | |
| 1561 | void |
| 1562 | put_u16(void *vp, u_int16_t v) |
| 1563 | { |
| 1564 | u_char *p = (u_char *)vp; |
| 1565 | |
| 1566 | p[0] = (u_char)(v >> 8) & 0xff; |
| 1567 | p[1] = (u_char)v & 0xff; |
| 1568 | } |
| 1569 | |
| 1570 | void |
| 1571 | ms_subtract_diff(struct timeval *start, int *ms) |
| 1572 | { |
| 1573 | struct timeval diff, finish; |
| 1574 | |
| 1575 | monotime_tv(&finish); |
| 1576 | timersub(&finish, start, &diff)do { (&diff)->tv_sec = (&finish)->tv_sec - (start )->tv_sec; (&diff)->tv_usec = (&finish)->tv_usec - (start)->tv_usec; if ((&diff)->tv_usec < 0) { (&diff)->tv_sec--; (&diff)->tv_usec += 1000000 ; } } while (0); |
| 1577 | *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000); |
| 1578 | } |
| 1579 | |
| 1580 | void |
| 1581 | ms_to_timespec(struct timespec *ts, int ms) |
| 1582 | { |
| 1583 | if (ms < 0) |
| 1584 | ms = 0; |
| 1585 | ts->tv_sec = ms / 1000; |
| 1586 | ts->tv_nsec = (ms % 1000) * 1000 * 1000; |
| 1587 | } |
| 1588 | |
| 1589 | void |
| 1590 | monotime_ts(struct timespec *ts) |
| 1591 | { |
| 1592 | if (clock_gettime(CLOCK_MONOTONIC3, ts) != 0) |
| 1593 | fatal("clock_gettime: %s", strerror(errno))sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1593, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "clock_gettime: %s" , strerror((*__errno()))); |
| 1594 | } |
| 1595 | |
| 1596 | void |
| 1597 | monotime_tv(struct timeval *tv) |
| 1598 | { |
| 1599 | struct timespec ts; |
| 1600 | |
| 1601 | monotime_ts(&ts); |
| 1602 | tv->tv_sec = ts.tv_sec; |
| 1603 | tv->tv_usec = ts.tv_nsec / 1000; |
| 1604 | } |
| 1605 | |
| 1606 | time_t |
| 1607 | monotime(void) |
| 1608 | { |
| 1609 | struct timespec ts; |
| 1610 | |
| 1611 | monotime_ts(&ts); |
| 1612 | return (ts.tv_sec); |
| 1613 | } |
| 1614 | |
| 1615 | double |
| 1616 | monotime_double(void) |
| 1617 | { |
| 1618 | struct timespec ts; |
| 1619 | |
| 1620 | monotime_ts(&ts); |
| 1621 | return (double)ts.tv_sec + (double)ts.tv_nsec / 1000000000.0; |
| 1622 | } |
| 1623 | |
| 1624 | void |
| 1625 | bandwidth_limit_init(struct bwlimit *bw, u_int64_t kbps, size_t buflen) |
| 1626 | { |
| 1627 | bw->buflen = buflen; |
| 1628 | bw->rate = kbps; |
| 1629 | bw->thresh = buflen; |
| 1630 | bw->lamt = 0; |
| 1631 | timerclear(&bw->bwstart)(&bw->bwstart)->tv_sec = (&bw->bwstart)-> tv_usec = 0; |
| 1632 | timerclear(&bw->bwend)(&bw->bwend)->tv_sec = (&bw->bwend)->tv_usec = 0; |
| 1633 | } |
| 1634 | |
| 1635 | /* Callback from read/write loop to insert bandwidth-limiting delays */ |
| 1636 | void |
| 1637 | bandwidth_limit(struct bwlimit *bw, size_t read_len) |
| 1638 | { |
| 1639 | u_int64_t waitlen; |
| 1640 | struct timespec ts, rm; |
| 1641 | |
| 1642 | bw->lamt += read_len; |
| 1643 | if (!timerisset(&bw->bwstart)((&bw->bwstart)->tv_sec || (&bw->bwstart)-> tv_usec)) { |
| 1644 | monotime_tv(&bw->bwstart); |
| 1645 | return; |
| 1646 | } |
| 1647 | if (bw->lamt < bw->thresh) |
| 1648 | return; |
| 1649 | |
| 1650 | monotime_tv(&bw->bwend); |
| 1651 | timersub(&bw->bwend, &bw->bwstart, &bw->bwend)do { (&bw->bwend)->tv_sec = (&bw->bwend)-> tv_sec - (&bw->bwstart)->tv_sec; (&bw->bwend )->tv_usec = (&bw->bwend)->tv_usec - (&bw-> bwstart)->tv_usec; if ((&bw->bwend)->tv_usec < 0) { (&bw->bwend)->tv_sec--; (&bw->bwend)-> tv_usec += 1000000; } } while (0); |
| 1652 | if (!timerisset(&bw->bwend)((&bw->bwend)->tv_sec || (&bw->bwend)->tv_usec )) |
| 1653 | return; |
| 1654 | |
| 1655 | bw->lamt *= 8; |
| 1656 | waitlen = (double)1000000L * bw->lamt / bw->rate; |
| 1657 | |
| 1658 | bw->bwstart.tv_sec = waitlen / 1000000L; |
| 1659 | bw->bwstart.tv_usec = waitlen % 1000000L; |
| 1660 | |
| 1661 | if (timercmp(&bw->bwstart, &bw->bwend, >)(((&bw->bwstart)->tv_sec == (&bw->bwend)-> tv_sec) ? ((&bw->bwstart)->tv_usec > (&bw-> bwend)->tv_usec) : ((&bw->bwstart)->tv_sec > ( &bw->bwend)->tv_sec))) { |
| 1662 | timersub(&bw->bwstart, &bw->bwend, &bw->bwend)do { (&bw->bwend)->tv_sec = (&bw->bwstart)-> tv_sec - (&bw->bwend)->tv_sec; (&bw->bwend)-> tv_usec = (&bw->bwstart)->tv_usec - (&bw->bwend )->tv_usec; if ((&bw->bwend)->tv_usec < 0) { ( &bw->bwend)->tv_sec--; (&bw->bwend)->tv_usec += 1000000; } } while (0); |
| 1663 | |
| 1664 | /* Adjust the wait time */ |
| 1665 | if (bw->bwend.tv_sec) { |
| 1666 | bw->thresh /= 2; |
| 1667 | if (bw->thresh < bw->buflen / 4) |
| 1668 | bw->thresh = bw->buflen / 4; |
| 1669 | } else if (bw->bwend.tv_usec < 10000) { |
| 1670 | bw->thresh *= 2; |
| 1671 | if (bw->thresh > bw->buflen * 8) |
| 1672 | bw->thresh = bw->buflen * 8; |
| 1673 | } |
| 1674 | |
| 1675 | TIMEVAL_TO_TIMESPEC(&bw->bwend, &ts)do { (&ts)->tv_sec = (&bw->bwend)->tv_sec; ( &ts)->tv_nsec = (&bw->bwend)->tv_usec * 1000 ; } while (0); |
| 1676 | while (nanosleep(&ts, &rm) == -1) { |
| 1677 | if (errno(*__errno()) != EINTR4) |
| 1678 | break; |
| 1679 | ts = rm; |
| 1680 | } |
| 1681 | } |
| 1682 | |
| 1683 | bw->lamt = 0; |
| 1684 | monotime_tv(&bw->bwstart); |
| 1685 | } |
| 1686 | |
| 1687 | /* Make a template filename for mk[sd]temp() */ |
| 1688 | void |
| 1689 | mktemp_proto(char *s, size_t len) |
| 1690 | { |
| 1691 | const char *tmpdir; |
| 1692 | int r; |
| 1693 | |
| 1694 | if ((tmpdir = getenv("TMPDIR")) != NULL((void *)0)) { |
| 1695 | r = snprintf(s, len, "%s/ssh-XXXXXXXXXXXX", tmpdir); |
| 1696 | if (r > 0 && (size_t)r < len) |
| 1697 | return; |
| 1698 | } |
| 1699 | r = snprintf(s, len, "/tmp/ssh-XXXXXXXXXXXX"); |
| 1700 | if (r < 0 || (size_t)r >= len) |
| 1701 | fatal_f("template string too short")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1701, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "template string too short" ); |
| 1702 | } |
| 1703 | |
| 1704 | static const struct { |
| 1705 | const char *name; |
| 1706 | int value; |
| 1707 | } ipqos[] = { |
| 1708 | { "none", INT_MAX2147483647 }, /* can't use 0 here; that's CS0 */ |
| 1709 | { "af11", IPTOS_DSCP_AF110x28 }, |
| 1710 | { "af12", IPTOS_DSCP_AF120x30 }, |
| 1711 | { "af13", IPTOS_DSCP_AF130x38 }, |
| 1712 | { "af21", IPTOS_DSCP_AF210x48 }, |
| 1713 | { "af22", IPTOS_DSCP_AF220x50 }, |
| 1714 | { "af23", IPTOS_DSCP_AF230x58 }, |
| 1715 | { "af31", IPTOS_DSCP_AF310x68 }, |
| 1716 | { "af32", IPTOS_DSCP_AF320x70 }, |
| 1717 | { "af33", IPTOS_DSCP_AF330x78 }, |
| 1718 | { "af41", IPTOS_DSCP_AF410x88 }, |
| 1719 | { "af42", IPTOS_DSCP_AF420x90 }, |
| 1720 | { "af43", IPTOS_DSCP_AF430x98 }, |
| 1721 | { "cs0", IPTOS_DSCP_CS00x00 }, |
| 1722 | { "cs1", IPTOS_DSCP_CS10x20 }, |
| 1723 | { "cs2", IPTOS_DSCP_CS20x40 }, |
| 1724 | { "cs3", IPTOS_DSCP_CS30x60 }, |
| 1725 | { "cs4", IPTOS_DSCP_CS40x80 }, |
| 1726 | { "cs5", IPTOS_DSCP_CS50xa0 }, |
| 1727 | { "cs6", IPTOS_DSCP_CS60xc0 }, |
| 1728 | { "cs7", IPTOS_DSCP_CS70xe0 }, |
| 1729 | { "ef", IPTOS_DSCP_EF0xb8 }, |
| 1730 | { "le", IPTOS_DSCP_LE0x04 }, |
| 1731 | { "lowdelay", IPTOS_LOWDELAY0x10 }, |
| 1732 | { "throughput", IPTOS_THROUGHPUT0x08 }, |
| 1733 | { "reliability", IPTOS_RELIABILITY0x04 }, |
| 1734 | { NULL((void *)0), -1 } |
| 1735 | }; |
| 1736 | |
| 1737 | int |
| 1738 | parse_ipqos(const char *cp) |
| 1739 | { |
| 1740 | u_int i; |
| 1741 | char *ep; |
| 1742 | long val; |
| 1743 | |
| 1744 | if (cp == NULL((void *)0)) |
| 1745 | return -1; |
| 1746 | for (i = 0; ipqos[i].name != NULL((void *)0); i++) { |
| 1747 | if (strcasecmp(cp, ipqos[i].name) == 0) |
| 1748 | return ipqos[i].value; |
| 1749 | } |
| 1750 | /* Try parsing as an integer */ |
| 1751 | val = strtol(cp, &ep, 0); |
| 1752 | if (*cp == '\0' || *ep != '\0' || val < 0 || val > 255) |
| 1753 | return -1; |
| 1754 | return val; |
| 1755 | } |
| 1756 | |
| 1757 | const char * |
| 1758 | iptos2str(int iptos) |
| 1759 | { |
| 1760 | int i; |
| 1761 | static char iptos_str[sizeof "0xff"]; |
| 1762 | |
| 1763 | for (i = 0; ipqos[i].name != NULL((void *)0); i++) { |
| 1764 | if (ipqos[i].value == iptos) |
| 1765 | return ipqos[i].name; |
| 1766 | } |
| 1767 | snprintf(iptos_str, sizeof iptos_str, "0x%02x", iptos); |
| 1768 | return iptos_str; |
| 1769 | } |
| 1770 | |
| 1771 | void |
| 1772 | lowercase(char *s) |
| 1773 | { |
| 1774 | for (; *s; s++) |
| 1775 | *s = tolower((u_char)*s); |
| 1776 | } |
| 1777 | |
| 1778 | int |
| 1779 | unix_listener(const char *path, int backlog, int unlink_first) |
| 1780 | { |
| 1781 | struct sockaddr_un sunaddr; |
| 1782 | int saved_errno, sock; |
| 1783 | |
| 1784 | memset(&sunaddr, 0, sizeof(sunaddr)); |
| 1785 | sunaddr.sun_family = AF_UNIX1; |
| 1786 | if (strlcpy(sunaddr.sun_path, path, |
| 1787 | sizeof(sunaddr.sun_path)) >= sizeof(sunaddr.sun_path)) { |
| 1788 | error_f("path \"%s\" too long for Unix domain socket", path)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1788, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "path \"%s\" too long for Unix domain socket" , path); |
| 1789 | errno(*__errno()) = ENAMETOOLONG63; |
| 1790 | return -1; |
| 1791 | } |
| 1792 | |
| 1793 | sock = socket(PF_UNIX1, SOCK_STREAM1, 0); |
| 1794 | if (sock == -1) { |
| 1795 | saved_errno = errno(*__errno()); |
| 1796 | error_f("socket: %.100s", strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1796, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "socket: %.100s", strerror((*__errno()))); |
| 1797 | errno(*__errno()) = saved_errno; |
| 1798 | return -1; |
| 1799 | } |
| 1800 | if (unlink_first == 1) { |
| 1801 | if (unlink(path) != 0 && errno(*__errno()) != ENOENT2) |
| 1802 | error("unlink(%s): %.100s", path, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1802, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "unlink(%s): %.100s" , path, strerror((*__errno()))); |
| 1803 | } |
| 1804 | if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) { |
| 1805 | saved_errno = errno(*__errno()); |
| 1806 | error_f("cannot bind to path %s: %s", path, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1806, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "cannot bind to path %s: %s" , path, strerror((*__errno()))); |
| 1807 | close(sock); |
| 1808 | errno(*__errno()) = saved_errno; |
| 1809 | return -1; |
| 1810 | } |
| 1811 | if (listen(sock, backlog) == -1) { |
| 1812 | saved_errno = errno(*__errno()); |
| 1813 | error_f("cannot listen on path %s: %s", path, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1813, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "cannot listen on path %s: %s" , path, strerror((*__errno()))); |
| 1814 | close(sock); |
| 1815 | unlink(path); |
| 1816 | errno(*__errno()) = saved_errno; |
| 1817 | return -1; |
| 1818 | } |
| 1819 | return sock; |
| 1820 | } |
| 1821 | |
| 1822 | /* |
| 1823 | * Compares two strings that maybe be NULL. Returns non-zero if strings |
| 1824 | * are both NULL or are identical, returns zero otherwise. |
| 1825 | */ |
| 1826 | static int |
| 1827 | strcmp_maybe_null(const char *a, const char *b) |
| 1828 | { |
| 1829 | if ((a == NULL((void *)0) && b != NULL((void *)0)) || (a != NULL((void *)0) && b == NULL((void *)0))) |
| 1830 | return 0; |
| 1831 | if (a != NULL((void *)0) && strcmp(a, b) != 0) |
| 1832 | return 0; |
| 1833 | return 1; |
| 1834 | } |
| 1835 | |
| 1836 | /* |
| 1837 | * Compare two forwards, returning non-zero if they are identical or |
| 1838 | * zero otherwise. |
| 1839 | */ |
| 1840 | int |
| 1841 | forward_equals(const struct Forward *a, const struct Forward *b) |
| 1842 | { |
| 1843 | if (strcmp_maybe_null(a->listen_host, b->listen_host) == 0) |
| 1844 | return 0; |
| 1845 | if (a->listen_port != b->listen_port) |
| 1846 | return 0; |
| 1847 | if (strcmp_maybe_null(a->listen_path, b->listen_path) == 0) |
| 1848 | return 0; |
| 1849 | if (strcmp_maybe_null(a->connect_host, b->connect_host) == 0) |
| 1850 | return 0; |
| 1851 | if (a->connect_port != b->connect_port) |
| 1852 | return 0; |
| 1853 | if (strcmp_maybe_null(a->connect_path, b->connect_path) == 0) |
| 1854 | return 0; |
| 1855 | /* allocated_port and handle are not checked */ |
| 1856 | return 1; |
| 1857 | } |
| 1858 | |
| 1859 | /* returns 1 if process is already daemonized, 0 otherwise */ |
| 1860 | int |
| 1861 | daemonized(void) |
| 1862 | { |
| 1863 | int fd; |
| 1864 | |
| 1865 | if ((fd = open(_PATH_TTY"/dev/tty", O_RDONLY0x0000 | O_NOCTTY0x8000)) >= 0) { |
| 1866 | close(fd); |
| 1867 | return 0; /* have controlling terminal */ |
| 1868 | } |
| 1869 | if (getppid() != 1) |
| 1870 | return 0; /* parent is not init */ |
| 1871 | if (getsid(0) != getpid()) |
| 1872 | return 0; /* not session leader */ |
| 1873 | debug3("already daemonized")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1873, 0, SYSLOG_LEVEL_DEBUG3, ((void *)0), "already daemonized" ); |
| 1874 | return 1; |
| 1875 | } |
| 1876 | |
| 1877 | /* |
| 1878 | * Splits 's' into an argument vector. Handles quoted string and basic |
| 1879 | * escape characters (\\, \", \'). Caller must free the argument vector |
| 1880 | * and its members. |
| 1881 | */ |
| 1882 | int |
| 1883 | argv_split(const char *s, int *argcp, char ***argvp, int terminate_on_comment) |
| 1884 | { |
| 1885 | int r = SSH_ERR_INTERNAL_ERROR-1; |
| 1886 | int argc = 0, quote, i, j; |
| 1887 | char *arg, **argv = xcalloc(1, sizeof(*argv)); |
| 1888 | |
| 1889 | *argvp = NULL((void *)0); |
| 1890 | *argcp = 0; |
| 1891 | |
| 1892 | for (i = 0; s[i] != '\0'; i++) { |
| 1893 | /* Skip leading whitespace */ |
| 1894 | if (s[i] == ' ' || s[i] == '\t') |
| 1895 | continue; |
| 1896 | if (terminate_on_comment && s[i] == '#') |
| 1897 | break; |
| 1898 | /* Start of a token */ |
| 1899 | quote = 0; |
| 1900 | |
| 1901 | argv = xreallocarray(argv, (argc + 2), sizeof(*argv)); |
| 1902 | arg = argv[argc++] = xcalloc(1, strlen(s + i) + 1); |
| 1903 | argv[argc] = NULL((void *)0); |
| 1904 | |
| 1905 | /* Copy the token in, removing escapes */ |
| 1906 | for (j = 0; s[i] != '\0'; i++) { |
| 1907 | if (s[i] == '\\') { |
| 1908 | if (s[i + 1] == '\'' || |
| 1909 | s[i + 1] == '\"' || |
| 1910 | s[i + 1] == '\\' || |
| 1911 | (quote == 0 && s[i + 1] == ' ')) { |
| 1912 | i++; /* Skip '\' */ |
| 1913 | arg[j++] = s[i]; |
| 1914 | } else { |
| 1915 | /* Unrecognised escape */ |
| 1916 | arg[j++] = s[i]; |
| 1917 | } |
| 1918 | } else if (quote == 0 && (s[i] == ' ' || s[i] == '\t')) |
| 1919 | break; /* done */ |
| 1920 | else if (quote == 0 && (s[i] == '\"' || s[i] == '\'')) |
| 1921 | quote = s[i]; /* quote start */ |
| 1922 | else if (quote != 0 && s[i] == quote) |
| 1923 | quote = 0; /* quote end */ |
| 1924 | else |
| 1925 | arg[j++] = s[i]; |
| 1926 | } |
| 1927 | if (s[i] == '\0') { |
| 1928 | if (quote != 0) { |
| 1929 | /* Ran out of string looking for close quote */ |
| 1930 | r = SSH_ERR_INVALID_FORMAT-4; |
| 1931 | goto out; |
| 1932 | } |
| 1933 | break; |
| 1934 | } |
| 1935 | } |
| 1936 | /* Success */ |
| 1937 | *argcp = argc; |
| 1938 | *argvp = argv; |
| 1939 | argc = 0; |
| 1940 | argv = NULL((void *)0); |
| 1941 | r = 0; |
| 1942 | out: |
| 1943 | if (argc != 0 && argv != NULL((void *)0)) { |
| 1944 | for (i = 0; i < argc; i++) |
| 1945 | free(argv[i]); |
| 1946 | free(argv); |
| 1947 | } |
| 1948 | return r; |
| 1949 | } |
| 1950 | |
| 1951 | /* |
| 1952 | * Reassemble an argument vector into a string, quoting and escaping as |
| 1953 | * necessary. Caller must free returned string. |
| 1954 | */ |
| 1955 | char * |
| 1956 | argv_assemble(int argc, char **argv) |
| 1957 | { |
| 1958 | int i, j, ws, r; |
| 1959 | char c, *ret; |
| 1960 | struct sshbuf *buf, *arg; |
| 1961 | |
| 1962 | if ((buf = sshbuf_new()) == NULL((void *)0) || (arg = sshbuf_new()) == NULL((void *)0)) |
| 1963 | fatal_f("sshbuf_new failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1963, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "sshbuf_new failed" ); |
| 1964 | |
| 1965 | for (i = 0; i < argc; i++) { |
| 1966 | ws = 0; |
| 1967 | sshbuf_reset(arg); |
| 1968 | for (j = 0; argv[i][j] != '\0'; j++) { |
| 1969 | r = 0; |
| 1970 | c = argv[i][j]; |
| 1971 | switch (c) { |
| 1972 | case ' ': |
| 1973 | case '\t': |
| 1974 | ws = 1; |
| 1975 | r = sshbuf_put_u8(arg, c); |
| 1976 | break; |
| 1977 | case '\\': |
| 1978 | case '\'': |
| 1979 | case '"': |
| 1980 | if ((r = sshbuf_put_u8(arg, '\\')) != 0) |
| 1981 | break; |
| 1982 | /* FALLTHROUGH */ |
| 1983 | default: |
| 1984 | r = sshbuf_put_u8(arg, c); |
| 1985 | break; |
| 1986 | } |
| 1987 | if (r != 0) |
| 1988 | fatal_fr(r, "sshbuf_put_u8")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1988, 1, SYSLOG_LEVEL_FATAL, ssh_err(r), "sshbuf_put_u8"); |
| 1989 | } |
| 1990 | if ((i != 0 && (r = sshbuf_put_u8(buf, ' ')) != 0) || |
| 1991 | (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0) || |
| 1992 | (r = sshbuf_putb(buf, arg)) != 0 || |
| 1993 | (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0)) |
| 1994 | fatal_fr(r, "assemble")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1994, 1, SYSLOG_LEVEL_FATAL, ssh_err(r), "assemble"); |
| 1995 | } |
| 1996 | if ((ret = malloc(sshbuf_len(buf) + 1)) == NULL((void *)0)) |
| 1997 | fatal_f("malloc failed")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 1997, 1, SYSLOG_LEVEL_FATAL, ((void *)0), "malloc failed"); |
| 1998 | memcpy(ret, sshbuf_ptr(buf), sshbuf_len(buf)); |
| 1999 | ret[sshbuf_len(buf)] = '\0'; |
| 2000 | sshbuf_free(buf); |
| 2001 | sshbuf_free(arg); |
| 2002 | return ret; |
| 2003 | } |
| 2004 | |
| 2005 | char * |
| 2006 | argv_next(int *argcp, char ***argvp) |
| 2007 | { |
| 2008 | char *ret = (*argvp)[0]; |
| 2009 | |
| 2010 | if (*argcp > 0 && ret != NULL((void *)0)) { |
| 2011 | (*argcp)--; |
| 2012 | (*argvp)++; |
| 2013 | } |
| 2014 | return ret; |
| 2015 | } |
| 2016 | |
| 2017 | void |
| 2018 | argv_consume(int *argcp) |
| 2019 | { |
| 2020 | *argcp = 0; |
| 2021 | } |
| 2022 | |
| 2023 | void |
| 2024 | argv_free(char **av, int ac) |
| 2025 | { |
| 2026 | int i; |
| 2027 | |
| 2028 | if (av == NULL((void *)0)) |
| 2029 | return; |
| 2030 | for (i = 0; i < ac; i++) |
| 2031 | free(av[i]); |
| 2032 | free(av); |
| 2033 | } |
| 2034 | |
| 2035 | /* Returns 0 if pid exited cleanly, non-zero otherwise */ |
| 2036 | int |
| 2037 | exited_cleanly(pid_t pid, const char *tag, const char *cmd, int quiet) |
| 2038 | { |
| 2039 | int status; |
| 2040 | |
| 2041 | while (waitpid(pid, &status, 0) == -1) { |
| 2042 | if (errno(*__errno()) != EINTR4) { |
| 2043 | error("%s waitpid: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2043, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s waitpid: %s", tag, strerror((*__errno()))); |
| 2044 | return -1; |
| 2045 | } |
| 2046 | } |
| 2047 | if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177 ) != 0)) { |
| 2048 | error("%s %s exited on signal %d", tag, cmd, WTERMSIG(status))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2048, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s %s exited on signal %d" , tag, cmd, (((status) & 0177))); |
| 2049 | return -1; |
| 2050 | } else if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) != 0) { |
| 2051 | do_log2(quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_INFO,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2052, 0, quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_INFO, ( (void *)0), "%s %s failed, status %d", tag, cmd, (int)(((unsigned )(status) >> 8) & 0xff)) |
| 2052 | "%s %s failed, status %d", tag, cmd, WEXITSTATUS(status))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2052, 0, quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_INFO, ( (void *)0), "%s %s failed, status %d", tag, cmd, (int)(((unsigned )(status) >> 8) & 0xff)); |
| 2053 | return -1; |
| 2054 | } |
| 2055 | return 0; |
| 2056 | } |
| 2057 | |
| 2058 | /* |
| 2059 | * Check a given path for security. This is defined as all components |
| 2060 | * of the path to the file must be owned by either the owner of |
| 2061 | * of the file or root and no directories must be group or world writable. |
| 2062 | * |
| 2063 | * XXX Should any specific check be done for sym links ? |
| 2064 | * |
| 2065 | * Takes a file name, its stat information (preferably from fstat() to |
| 2066 | * avoid races), the uid of the expected owner, their home directory and an |
| 2067 | * error buffer plus max size as arguments. |
| 2068 | * |
| 2069 | * Returns 0 on success and -1 on failure |
| 2070 | */ |
| 2071 | int |
| 2072 | safe_path(const char *name, struct stat *stp, const char *pw_dir, |
| 2073 | uid_t uid, char *err, size_t errlen) |
| 2074 | { |
| 2075 | char buf[PATH_MAX1024], homedir[PATH_MAX1024]; |
| 2076 | char *cp; |
| 2077 | int comparehome = 0; |
| 2078 | struct stat st; |
| 2079 | |
| 2080 | if (realpath(name, buf) == NULL((void *)0)) { |
| 2081 | snprintf(err, errlen, "realpath %s failed: %s", name, |
| 2082 | strerror(errno(*__errno()))); |
| 2083 | return -1; |
| 2084 | } |
| 2085 | if (pw_dir != NULL((void *)0) && realpath(pw_dir, homedir) != NULL((void *)0)) |
| 2086 | comparehome = 1; |
| 2087 | |
| 2088 | if (!S_ISREG(stp->st_mode)((stp->st_mode & 0170000) == 0100000)) { |
| 2089 | snprintf(err, errlen, "%s is not a regular file", buf); |
| 2090 | return -1; |
| 2091 | } |
| 2092 | if ((stp->st_uid != 0 && stp->st_uid != uid) || |
| 2093 | (stp->st_mode & 022) != 0) { |
| 2094 | snprintf(err, errlen, "bad ownership or modes for file %s", |
| 2095 | buf); |
| 2096 | return -1; |
| 2097 | } |
| 2098 | |
| 2099 | /* for each component of the canonical path, walking upwards */ |
| 2100 | for (;;) { |
| 2101 | if ((cp = dirname(buf)) == NULL((void *)0)) { |
| 2102 | snprintf(err, errlen, "dirname() failed"); |
| 2103 | return -1; |
| 2104 | } |
| 2105 | strlcpy(buf, cp, sizeof(buf)); |
| 2106 | |
| 2107 | if (stat(buf, &st) == -1 || |
| 2108 | (st.st_uid != 0 && st.st_uid != uid) || |
| 2109 | (st.st_mode & 022) != 0) { |
| 2110 | snprintf(err, errlen, |
| 2111 | "bad ownership or modes for directory %s", buf); |
| 2112 | return -1; |
| 2113 | } |
| 2114 | |
| 2115 | /* If are past the homedir then we can stop */ |
| 2116 | if (comparehome && strcmp(homedir, buf) == 0) |
| 2117 | break; |
| 2118 | |
| 2119 | /* |
| 2120 | * dirname should always complete with a "/" path, |
| 2121 | * but we can be paranoid and check for "." too |
| 2122 | */ |
| 2123 | if ((strcmp("/", buf) == 0) || (strcmp(".", buf) == 0)) |
| 2124 | break; |
| 2125 | } |
| 2126 | return 0; |
| 2127 | } |
| 2128 | |
| 2129 | /* |
| 2130 | * Version of safe_path() that accepts an open file descriptor to |
| 2131 | * avoid races. |
| 2132 | * |
| 2133 | * Returns 0 on success and -1 on failure |
| 2134 | */ |
| 2135 | int |
| 2136 | safe_path_fd(int fd, const char *file, struct passwd *pw, |
| 2137 | char *err, size_t errlen) |
| 2138 | { |
| 2139 | struct stat st; |
| 2140 | |
| 2141 | /* check the open file to avoid races */ |
| 2142 | if (fstat(fd, &st) == -1) { |
| 2143 | snprintf(err, errlen, "cannot stat file %s: %s", |
| 2144 | file, strerror(errno(*__errno()))); |
| 2145 | return -1; |
| 2146 | } |
| 2147 | return safe_path(file, &st, pw->pw_dir, pw->pw_uid, err, errlen); |
| 2148 | } |
| 2149 | |
| 2150 | /* |
| 2151 | * Sets the value of the given variable in the environment. If the variable |
| 2152 | * already exists, its value is overridden. |
| 2153 | */ |
| 2154 | void |
| 2155 | child_set_env(char ***envp, u_int *envsizep, const char *name, |
| 2156 | const char *value) |
| 2157 | { |
| 2158 | char **env; |
| 2159 | u_int envsize; |
| 2160 | u_int i, namelen; |
| 2161 | |
| 2162 | if (strchr(name, '=') != NULL((void *)0)) { |
| 2163 | error("Invalid environment variable \"%.100s\"", name)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2163, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Invalid environment variable \"%.100s\"" , name); |
| 2164 | return; |
| 2165 | } |
| 2166 | |
| 2167 | /* |
| 2168 | * Find the slot where the value should be stored. If the variable |
| 2169 | * already exists, we reuse the slot; otherwise we append a new slot |
| 2170 | * at the end of the array, expanding if necessary. |
| 2171 | */ |
| 2172 | env = *envp; |
| 2173 | namelen = strlen(name); |
| 2174 | for (i = 0; env[i]; i++) |
| 2175 | if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=') |
| 2176 | break; |
| 2177 | if (env[i]) { |
| 2178 | /* Reuse the slot. */ |
| 2179 | free(env[i]); |
| 2180 | } else { |
| 2181 | /* New variable. Expand if necessary. */ |
| 2182 | envsize = *envsizep; |
| 2183 | if (i >= envsize - 1) { |
| 2184 | if (envsize >= 1000) |
| 2185 | fatal("child_set_env: too many env vars")sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2185, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "child_set_env: too many env vars" ); |
| 2186 | envsize += 50; |
| 2187 | env = (*envp) = xreallocarray(env, envsize, sizeof(char *)); |
| 2188 | *envsizep = envsize; |
| 2189 | } |
| 2190 | /* Need to set the NULL pointer at end of array beyond the new slot. */ |
| 2191 | env[i + 1] = NULL((void *)0); |
| 2192 | } |
| 2193 | |
| 2194 | /* Allocate space and format the variable in the appropriate slot. */ |
| 2195 | /* XXX xasprintf */ |
| 2196 | env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1); |
| 2197 | snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value); |
| 2198 | } |
| 2199 | |
| 2200 | /* |
| 2201 | * Check and optionally lowercase a domain name, also removes trailing '.' |
| 2202 | * Returns 1 on success and 0 on failure, storing an error message in errstr. |
| 2203 | */ |
| 2204 | int |
| 2205 | valid_domain(char *name, int makelower, const char **errstr) |
| 2206 | { |
| 2207 | size_t i, l = strlen(name); |
| 2208 | u_char c, last = '\0'; |
| 2209 | static char errbuf[256]; |
| 2210 | |
| 2211 | if (l == 0) { |
| 2212 | strlcpy(errbuf, "empty domain name", sizeof(errbuf)); |
| 2213 | goto bad; |
| 2214 | } |
| 2215 | if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0])) { |
| 2216 | snprintf(errbuf, sizeof(errbuf), "domain name \"%.100s\" " |
| 2217 | "starts with invalid character", name); |
| 2218 | goto bad; |
| 2219 | } |
| 2220 | for (i = 0; i < l; i++) { |
| 2221 | c = tolower((u_char)name[i]); |
| 2222 | if (makelower) |
| 2223 | name[i] = (char)c; |
| 2224 | if (last == '.' && c == '.') { |
| 2225 | snprintf(errbuf, sizeof(errbuf), "domain name " |
| 2226 | "\"%.100s\" contains consecutive separators", name); |
| 2227 | goto bad; |
| 2228 | } |
| 2229 | if (c != '.' && c != '-' && !isalnum(c) && |
| 2230 | c != '_') /* technically invalid, but common */ { |
| 2231 | snprintf(errbuf, sizeof(errbuf), "domain name " |
| 2232 | "\"%.100s\" contains invalid characters", name); |
| 2233 | goto bad; |
| 2234 | } |
| 2235 | last = c; |
| 2236 | } |
| 2237 | if (name[l - 1] == '.') |
| 2238 | name[l - 1] = '\0'; |
| 2239 | if (errstr != NULL((void *)0)) |
| 2240 | *errstr = NULL((void *)0); |
| 2241 | return 1; |
| 2242 | bad: |
| 2243 | if (errstr != NULL((void *)0)) |
| 2244 | *errstr = errbuf; |
| 2245 | return 0; |
| 2246 | } |
| 2247 | |
| 2248 | /* |
| 2249 | * Verify that a environment variable name (not including initial '$') is |
| 2250 | * valid; consisting of one or more alphanumeric or underscore characters only. |
| 2251 | * Returns 1 on valid, 0 otherwise. |
| 2252 | */ |
| 2253 | int |
| 2254 | valid_env_name(const char *name) |
| 2255 | { |
| 2256 | const char *cp; |
| 2257 | |
| 2258 | if (name[0] == '\0') |
| 2259 | return 0; |
| 2260 | for (cp = name; *cp != '\0'; cp++) { |
| 2261 | if (!isalnum((u_char)*cp) && *cp != '_') |
| 2262 | return 0; |
| 2263 | } |
| 2264 | return 1; |
| 2265 | } |
| 2266 | |
| 2267 | const char * |
| 2268 | atoi_err(const char *nptr, int *val) |
| 2269 | { |
| 2270 | const char *errstr = NULL((void *)0); |
| 2271 | long long num; |
| 2272 | |
| 2273 | if (nptr == NULL((void *)0) || *nptr == '\0') |
| 2274 | return "missing"; |
| 2275 | num = strtonum(nptr, 0, INT_MAX2147483647, &errstr); |
| 2276 | if (errstr == NULL((void *)0)) |
| 2277 | *val = (int)num; |
| 2278 | return errstr; |
| 2279 | } |
| 2280 | |
| 2281 | int |
| 2282 | parse_absolute_time(const char *s, uint64_t *tp) |
| 2283 | { |
| 2284 | struct tm tm; |
| 2285 | time_t tt; |
| 2286 | char buf[32], *fmt; |
| 2287 | |
| 2288 | *tp = 0; |
| 2289 | |
| 2290 | /* |
| 2291 | * POSIX strptime says "The application shall ensure that there |
| 2292 | * is white-space or other non-alphanumeric characters between |
| 2293 | * any two conversion specifications" so arrange things this way. |
| 2294 | */ |
| 2295 | switch (strlen(s)) { |
| 2296 | case 8: /* YYYYMMDD */ |
| 2297 | fmt = "%Y-%m-%d"; |
| 2298 | snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); |
| 2299 | break; |
| 2300 | case 12: /* YYYYMMDDHHMM */ |
| 2301 | fmt = "%Y-%m-%dT%H:%M"; |
| 2302 | snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s", |
| 2303 | s, s + 4, s + 6, s + 8, s + 10); |
| 2304 | break; |
| 2305 | case 14: /* YYYYMMDDHHMMSS */ |
| 2306 | fmt = "%Y-%m-%dT%H:%M:%S"; |
| 2307 | snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", |
| 2308 | s, s + 4, s + 6, s + 8, s + 10, s + 12); |
| 2309 | break; |
| 2310 | default: |
| 2311 | return SSH_ERR_INVALID_FORMAT-4; |
| 2312 | } |
| 2313 | |
| 2314 | memset(&tm, 0, sizeof(tm)); |
| 2315 | if (strptime(buf, fmt, &tm) == NULL((void *)0)) |
| 2316 | return SSH_ERR_INVALID_FORMAT-4; |
| 2317 | if ((tt = mktime(&tm)) < 0) |
| 2318 | return SSH_ERR_INVALID_FORMAT-4; |
| 2319 | /* success */ |
| 2320 | *tp = (uint64_t)tt; |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | /* On OpenBSD time_t is int64_t which is long long. */ |
| 2325 | #define SSH_TIME_T_MAX9223372036854775807LL LLONG_MAX9223372036854775807LL |
| 2326 | |
| 2327 | void |
| 2328 | format_absolute_time(uint64_t t, char *buf, size_t len) |
| 2329 | { |
| 2330 | time_t tt = t > SSH_TIME_T_MAX9223372036854775807LL ? SSH_TIME_T_MAX9223372036854775807LL : t; |
| 2331 | struct tm tm; |
| 2332 | |
| 2333 | localtime_r(&tt, &tm); |
| 2334 | strftime(buf, len, "%Y-%m-%dT%H:%M:%S", &tm); |
| 2335 | } |
| 2336 | |
| 2337 | /* check if path is absolute */ |
| 2338 | int |
| 2339 | path_absolute(const char *path) |
| 2340 | { |
| 2341 | return (*path == '/') ? 1 : 0; |
| 2342 | } |
| 2343 | |
| 2344 | void |
| 2345 | skip_space(char **cpp) |
| 2346 | { |
| 2347 | char *cp; |
| 2348 | |
| 2349 | for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++) |
| 2350 | ; |
| 2351 | *cpp = cp; |
| 2352 | } |
| 2353 | |
| 2354 | /* authorized_key-style options parsing helpers */ |
| 2355 | |
| 2356 | /* |
| 2357 | * Match flag 'opt' in *optsp, and if allow_negate is set then also match |
| 2358 | * 'no-opt'. Returns -1 if option not matched, 1 if option matches or 0 |
| 2359 | * if negated option matches. |
| 2360 | * If the option or negated option matches, then *optsp is updated to |
| 2361 | * point to the first character after the option. |
| 2362 | */ |
| 2363 | int |
| 2364 | opt_flag(const char *opt, int allow_negate, const char **optsp) |
| 2365 | { |
| 2366 | size_t opt_len = strlen(opt); |
| 2367 | const char *opts = *optsp; |
| 2368 | int negate = 0; |
| 2369 | |
| 2370 | if (allow_negate && strncasecmp(opts, "no-", 3) == 0) { |
| 2371 | opts += 3; |
| 2372 | negate = 1; |
| 2373 | } |
| 2374 | if (strncasecmp(opts, opt, opt_len) == 0) { |
| 2375 | *optsp = opts + opt_len; |
| 2376 | return negate ? 0 : 1; |
| 2377 | } |
| 2378 | return -1; |
| 2379 | } |
| 2380 | |
| 2381 | char * |
| 2382 | opt_dequote(const char **sp, const char **errstrp) |
| 2383 | { |
| 2384 | const char *s = *sp; |
| 2385 | char *ret; |
| 2386 | size_t i; |
| 2387 | |
| 2388 | *errstrp = NULL((void *)0); |
| 2389 | if (*s != '"') { |
| 2390 | *errstrp = "missing start quote"; |
| 2391 | return NULL((void *)0); |
| 2392 | } |
| 2393 | s++; |
| 2394 | if ((ret = malloc(strlen((s)) + 1)) == NULL((void *)0)) { |
| 2395 | *errstrp = "memory allocation failed"; |
| 2396 | return NULL((void *)0); |
| 2397 | } |
| 2398 | for (i = 0; *s != '\0' && *s != '"';) { |
| 2399 | if (s[0] == '\\' && s[1] == '"') |
| 2400 | s++; |
| 2401 | ret[i++] = *s++; |
| 2402 | } |
| 2403 | if (*s == '\0') { |
| 2404 | *errstrp = "missing end quote"; |
| 2405 | free(ret); |
| 2406 | return NULL((void *)0); |
| 2407 | } |
| 2408 | ret[i] = '\0'; |
| 2409 | s++; |
| 2410 | *sp = s; |
| 2411 | return ret; |
| 2412 | } |
| 2413 | |
| 2414 | int |
| 2415 | opt_match(const char **opts, const char *term) |
| 2416 | { |
| 2417 | if (strncasecmp((*opts), term, strlen(term)) == 0 && |
| 2418 | (*opts)[strlen(term)] == '=') { |
| 2419 | *opts += strlen(term) + 1; |
| 2420 | return 1; |
| 2421 | } |
| 2422 | return 0; |
| 2423 | } |
| 2424 | |
| 2425 | void |
| 2426 | opt_array_append2(const char *file, const int line, const char *directive, |
| 2427 | char ***array, int **iarray, u_int *lp, const char *s, int i) |
| 2428 | { |
| 2429 | |
| 2430 | if (*lp >= INT_MAX2147483647) |
| 2431 | fatal("%s line %d: Too many %s entries", file, line, directive)sshfatal("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2431, 0, SYSLOG_LEVEL_FATAL, ((void *)0), "%s line %d: Too many %s entries" , file, line, directive); |
| 2432 | |
| 2433 | if (iarray != NULL((void *)0)) { |
| 2434 | *iarray = xrecallocarray(*iarray, *lp, *lp + 1, |
| 2435 | sizeof(**iarray)); |
| 2436 | (*iarray)[*lp] = i; |
| 2437 | } |
| 2438 | |
| 2439 | *array = xrecallocarray(*array, *lp, *lp + 1, sizeof(**array)); |
| 2440 | (*array)[*lp] = xstrdup(s); |
| 2441 | (*lp)++; |
| 2442 | } |
| 2443 | |
| 2444 | void |
| 2445 | opt_array_append(const char *file, const int line, const char *directive, |
| 2446 | char ***array, u_int *lp, const char *s) |
| 2447 | { |
| 2448 | opt_array_append2(file, line, directive, array, NULL((void *)0), lp, s, 0); |
| 2449 | } |
| 2450 | |
| 2451 | sshsig_t |
| 2452 | ssh_signal(int signum, sshsig_t handler) |
| 2453 | { |
| 2454 | struct sigaction sa, osa; |
| 2455 | |
| 2456 | /* mask all other signals while in handler */ |
| 2457 | memset(&sa, 0, sizeof(sa)); |
| 2458 | sa.sa_handler__sigaction_u.__sa_handler = handler; |
| 2459 | sigfillset(&sa.sa_mask); |
| 2460 | if (signum != SIGALRM14) |
| 2461 | sa.sa_flags = SA_RESTART0x0002; |
| 2462 | if (sigaction(signum, &sa, &osa) == -1) { |
| 2463 | debug3("sigaction(%s): %s", strsignal(signum), strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2463, 0, SYSLOG_LEVEL_DEBUG3, ((void *)0), "sigaction(%s): %s" , strsignal(signum), strerror((*__errno()))); |
| 2464 | return SIG_ERR(void (*)(int))-1; |
| 2465 | } |
| 2466 | return osa.sa_handler__sigaction_u.__sa_handler; |
| 2467 | } |
| 2468 | |
| 2469 | int |
| 2470 | stdfd_devnull(int do_stdin, int do_stdout, int do_stderr) |
| 2471 | { |
| 2472 | int devnull, ret = 0; |
| 2473 | |
| 2474 | if ((devnull = open(_PATH_DEVNULL"/dev/null", O_RDWR0x0002)) == -1) { |
| 2475 | error_f("open %s: %s", _PATH_DEVNULL,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2476, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "open %s: %s", "/dev/null" , strerror((*__errno()))) |
| 2476 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2476, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "open %s: %s", "/dev/null" , strerror((*__errno()))); |
| 2477 | return -1; |
| 2478 | } |
| 2479 | if ((do_stdin && dup2(devnull, STDIN_FILENO0) == -1) || |
| 2480 | (do_stdout && dup2(devnull, STDOUT_FILENO1) == -1) || |
| 2481 | (do_stderr && dup2(devnull, STDERR_FILENO2) == -1)) { |
| 2482 | error_f("dup2: %s", strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2482, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "dup2: %s", strerror ((*__errno()))); |
| 2483 | ret = -1; |
| 2484 | } |
| 2485 | if (devnull > STDERR_FILENO2) |
| 2486 | close(devnull); |
| 2487 | return ret; |
| 2488 | } |
| 2489 | |
| 2490 | /* |
| 2491 | * Runs command in a subprocess with a minimal environment. |
| 2492 | * Returns pid on success, 0 on failure. |
| 2493 | * The child stdout and stderr maybe captured, left attached or sent to |
| 2494 | * /dev/null depending on the contents of flags. |
| 2495 | * "tag" is prepended to log messages. |
| 2496 | * NB. "command" is only used for logging; the actual command executed is |
| 2497 | * av[0]. |
| 2498 | */ |
| 2499 | pid_t |
| 2500 | subprocess(const char *tag, const char *command, |
| 2501 | int ac, char **av, FILE **child, u_int flags, |
| 2502 | struct passwd *pw, privdrop_fn *drop_privs, privrestore_fn *restore_privs) |
| 2503 | { |
| 2504 | FILE *f = NULL((void *)0); |
| 2505 | struct stat st; |
| 2506 | int fd, devnull, p[2], i; |
| 2507 | pid_t pid; |
| 2508 | char *cp, errmsg[512]; |
| 2509 | u_int nenv = 0; |
| 2510 | char **env = NULL((void *)0); |
| 2511 | |
| 2512 | /* If dropping privs, then must specify user and restore function */ |
| 2513 | if (drop_privs != NULL((void *)0) && (pw == NULL((void *)0) || restore_privs == NULL((void *)0))) { |
| 2514 | error("%s: inconsistent arguments", tag)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2514, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: inconsistent arguments" , tag); /* XXX fatal? */ |
| 2515 | return 0; |
| 2516 | } |
| 2517 | if (pw == NULL((void *)0) && (pw = getpwuid(getuid())) == NULL((void *)0)) { |
| 2518 | error("%s: no user for current uid", tag)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2518, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: no user for current uid" , tag); |
| 2519 | return 0; |
| 2520 | } |
| 2521 | if (child != NULL((void *)0)) |
| 2522 | *child = NULL((void *)0); |
| 2523 | |
| 2524 | debug3_f("%s command \"%s\" running as %s (flags 0x%x)",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2525, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "%s command \"%s\" running as %s (flags 0x%x)" , tag, command, pw->pw_name, flags) |
| 2525 | tag, command, pw->pw_name, flags)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2525, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "%s command \"%s\" running as %s (flags 0x%x)" , tag, command, pw->pw_name, flags); |
| 2526 | |
| 2527 | /* Check consistency */ |
| 2528 | if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD(1)) != 0 && |
| 2529 | (flags & SSH_SUBPROCESS_STDOUT_CAPTURE(1<<1)) != 0) { |
| 2530 | error_f("inconsistent flags")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2530, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "inconsistent flags" ); |
| 2531 | return 0; |
| 2532 | } |
| 2533 | if (((flags & SSH_SUBPROCESS_STDOUT_CAPTURE(1<<1)) == 0) != (child == NULL((void *)0))) { |
| 2534 | error_f("inconsistent flags/output")sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2534, 1, SYSLOG_LEVEL_ERROR, ((void *)0), "inconsistent flags/output" ); |
| 2535 | return 0; |
| 2536 | } |
| 2537 | |
| 2538 | /* |
| 2539 | * If executing an explicit binary, then verify the it exists |
| 2540 | * and appears safe-ish to execute |
| 2541 | */ |
| 2542 | if (!path_absolute(av[0])) { |
| 2543 | error("%s path is not absolute", tag)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2543, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s path is not absolute" , tag); |
| 2544 | return 0; |
| 2545 | } |
| 2546 | if (drop_privs != NULL((void *)0)) |
| 2547 | drop_privs(pw); |
| 2548 | if (stat(av[0], &st) == -1) { |
| 2549 | error("Could not stat %s \"%s\": %s", tag,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2550, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Could not stat %s \"%s\": %s" , tag, av[0], strerror((*__errno()))) |
| 2550 | av[0], strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2550, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Could not stat %s \"%s\": %s" , tag, av[0], strerror((*__errno()))); |
| 2551 | goto restore_return; |
| 2552 | } |
| 2553 | if ((flags & SSH_SUBPROCESS_UNSAFE_PATH(1<<3)) == 0 && |
| 2554 | safe_path(av[0], &st, NULL((void *)0), 0, errmsg, sizeof(errmsg)) != 0) { |
| 2555 | error("Unsafe %s \"%s\": %s", tag, av[0], errmsg)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2555, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "Unsafe %s \"%s\": %s" , tag, av[0], errmsg); |
| 2556 | goto restore_return; |
| 2557 | } |
| 2558 | /* Prepare to keep the child's stdout if requested */ |
| 2559 | if (pipe(p) == -1) { |
| 2560 | error("%s: pipe: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2560, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: pipe: %s", tag , strerror((*__errno()))); |
| 2561 | restore_return: |
| 2562 | if (restore_privs != NULL((void *)0)) |
| 2563 | restore_privs(); |
| 2564 | return 0; |
| 2565 | } |
| 2566 | if (restore_privs != NULL((void *)0)) |
| 2567 | restore_privs(); |
| 2568 | |
| 2569 | switch ((pid = fork())) { |
| 2570 | case -1: /* error */ |
| 2571 | error("%s: fork: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2571, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: fork: %s", tag , strerror((*__errno()))); |
| 2572 | close(p[0]); |
| 2573 | close(p[1]); |
| 2574 | return 0; |
| 2575 | case 0: /* child */ |
| 2576 | /* Prepare a minimal environment for the child. */ |
| 2577 | if ((flags & SSH_SUBPROCESS_PRESERVE_ENV(1<<4)) == 0) { |
| 2578 | nenv = 5; |
| 2579 | env = xcalloc(sizeof(*env), nenv); |
| 2580 | child_set_env(&env, &nenv, "PATH", _PATH_STDPATH"/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin"); |
| 2581 | child_set_env(&env, &nenv, "USER", pw->pw_name); |
| 2582 | child_set_env(&env, &nenv, "LOGNAME", pw->pw_name); |
| 2583 | child_set_env(&env, &nenv, "HOME", pw->pw_dir); |
| 2584 | if ((cp = getenv("LANG")) != NULL((void *)0)) |
| 2585 | child_set_env(&env, &nenv, "LANG", cp); |
| 2586 | } |
| 2587 | |
| 2588 | for (i = 1; i < NSIG33; i++) |
| 2589 | ssh_signal(i, SIG_DFL(void (*)(int))0); |
| 2590 | |
| 2591 | if ((devnull = open(_PATH_DEVNULL"/dev/null", O_RDWR0x0002)) == -1) { |
| 2592 | error("%s: open %s: %s", tag, _PATH_DEVNULL,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2593, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: open %s: %s" , tag, "/dev/null", strerror((*__errno()))) |
| 2593 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2593, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: open %s: %s" , tag, "/dev/null", strerror((*__errno()))); |
| 2594 | _exit(1); |
| 2595 | } |
| 2596 | if (dup2(devnull, STDIN_FILENO0) == -1) { |
| 2597 | error("%s: dup2: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2597, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: dup2: %s", tag , strerror((*__errno()))); |
| 2598 | _exit(1); |
| 2599 | } |
| 2600 | |
| 2601 | /* Set up stdout as requested; leave stderr in place for now. */ |
| 2602 | fd = -1; |
| 2603 | if ((flags & SSH_SUBPROCESS_STDOUT_CAPTURE(1<<1)) != 0) |
| 2604 | fd = p[1]; |
| 2605 | else if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD(1)) != 0) |
| 2606 | fd = devnull; |
| 2607 | if (fd != -1 && dup2(fd, STDOUT_FILENO1) == -1) { |
| 2608 | error("%s: dup2: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2608, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: dup2: %s", tag , strerror((*__errno()))); |
| 2609 | _exit(1); |
| 2610 | } |
| 2611 | closefrom(STDERR_FILENO2 + 1); |
| 2612 | |
| 2613 | if (geteuid() == 0 && |
| 2614 | initgroups(pw->pw_name, pw->pw_gid) == -1) { |
| 2615 | error("%s: initgroups(%s, %u): %s", tag,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2616, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: initgroups(%s, %u): %s" , tag, pw->pw_name, (u_int)pw->pw_gid, strerror((*__errno ()))) |
| 2616 | pw->pw_name, (u_int)pw->pw_gid, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2616, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: initgroups(%s, %u): %s" , tag, pw->pw_name, (u_int)pw->pw_gid, strerror((*__errno ()))); |
| 2617 | _exit(1); |
| 2618 | } |
| 2619 | if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1) { |
| 2620 | error("%s: setresgid %u: %s", tag, (u_int)pw->pw_gid,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2621, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: setresgid %u: %s" , tag, (u_int)pw->pw_gid, strerror((*__errno()))) |
| 2621 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2621, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: setresgid %u: %s" , tag, (u_int)pw->pw_gid, strerror((*__errno()))); |
| 2622 | _exit(1); |
| 2623 | } |
| 2624 | if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1) { |
| 2625 | error("%s: setresuid %u: %s", tag, (u_int)pw->pw_uid,sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2626, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: setresuid %u: %s" , tag, (u_int)pw->pw_uid, strerror((*__errno()))) |
| 2626 | strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2626, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: setresuid %u: %s" , tag, (u_int)pw->pw_uid, strerror((*__errno()))); |
| 2627 | _exit(1); |
| 2628 | } |
| 2629 | /* stdin is pointed to /dev/null at this point */ |
| 2630 | if ((flags & SSH_SUBPROCESS_STDOUT_DISCARD(1)) != 0 && |
| 2631 | dup2(STDIN_FILENO0, STDERR_FILENO2) == -1) { |
| 2632 | error("%s: dup2: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2632, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: dup2: %s", tag , strerror((*__errno()))); |
| 2633 | _exit(1); |
| 2634 | } |
| 2635 | if (env != NULL((void *)0)) |
| 2636 | execve(av[0], av, env); |
| 2637 | else |
| 2638 | execv(av[0], av); |
| 2639 | error("%s %s \"%s\": %s", tag, env == NULL ? "execv" : "execve",sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2640, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s %s \"%s\": %s" , tag, env == ((void *)0) ? "execv" : "execve", command, strerror ((*__errno()))) |
| 2640 | command, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2640, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s %s \"%s\": %s" , tag, env == ((void *)0) ? "execv" : "execve", command, strerror ((*__errno()))); |
| 2641 | _exit(127); |
| 2642 | default: /* parent */ |
| 2643 | break; |
| 2644 | } |
| 2645 | |
| 2646 | close(p[1]); |
| 2647 | if ((flags & SSH_SUBPROCESS_STDOUT_CAPTURE(1<<1)) == 0) |
| 2648 | close(p[0]); |
| 2649 | else if ((f = fdopen(p[0], "r")) == NULL((void *)0)) { |
| 2650 | error("%s: fdopen: %s", tag, strerror(errno))sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2650, 0, SYSLOG_LEVEL_ERROR, ((void *)0), "%s: fdopen: %s", tag, strerror((*__errno()))); |
| 2651 | close(p[0]); |
| 2652 | /* Don't leave zombie child */ |
| 2653 | kill(pid, SIGTERM15); |
| 2654 | while (waitpid(pid, NULL((void *)0), 0) == -1 && errno(*__errno()) == EINTR4) |
| 2655 | ; |
| 2656 | return 0; |
| 2657 | } |
| 2658 | /* Success */ |
| 2659 | debug3_f("%s pid %ld", tag, (long)pid)sshlog("/usr/src/usr.bin/ssh/sftp-server/../misc.c", __func__ , 2659, 1, SYSLOG_LEVEL_DEBUG3, ((void *)0), "%s pid %ld", tag , (long)pid); |
| 2660 | if (child != NULL((void *)0)) |
| 2661 | *child = f; |
| 2662 | return pid; |
| 2663 | } |
| 2664 | |
| 2665 | const char * |
| 2666 | lookup_env_in_list(const char *env, char * const *envs, size_t nenvs) |
| 2667 | { |
| 2668 | size_t i, envlen; |
| 2669 | |
| 2670 | envlen = strlen(env); |
| 2671 | for (i = 0; i < nenvs; i++) { |
| 2672 | if (strncmp(envs[i], env, envlen) == 0 && |
| 2673 | envs[i][envlen] == '=') { |
| 2674 | return envs[i] + envlen + 1; |
| 2675 | } |
| 2676 | } |
| 2677 | return NULL((void *)0); |
| 2678 | } |