Bug Summary

File:src/sbin/mount/mount.c
Warning:line 383, column 4
Potential leak of memory pointed to by 'optbuf'

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name mount.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sbin/mount/obj -resource-dir /usr/local/lib/clang/13.0.0 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/sbin/mount/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/sbin/mount/mount.c
1/* $OpenBSD: mount.c,v 1.74 2020/12/11 06:29:43 robert Exp $ */
2/* $NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp $ */
3
4/*
5 * Copyright (c) 1980, 1989, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/types.h>
34#include <sys/mount.h>
35#include <sys/socket.h>
36#include <sys/wait.h>
37
38#include <nfs/rpcv2.h>
39#include <nfs/nfsproto.h>
40#include <nfs/nfs.h>
41
42#include <err.h>
43#include <errno(*__errno()).h>
44#include <fstab.h>
45#include <netdb.h>
46#include <signal.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <unistd.h>
51#include <limits.h>
52#include <util.h>
53
54#include "pathnames.h"
55
56int debug, verbose, skip;
57char **typelist = NULL((void *)0);
58enum { NONET_FILTER, NET_FILTER } filter = NONET_FILTER;
59
60int selected(const char *);
61char *catopt(char *, const char *);
62char *flags2opts(u_int32_t);
63struct statfs
64 *getmntpt(const char *);
65int hasopt(const char *, const char *);
66void maketypelist(char *);
67void mangle(char *, int *, const char **, int);
68int mountfs(const char *, const char *, const char *, const char *,
69 const char *, int);
70void prmount(struct statfs *);
71int disklabelcheck(struct fstab *);
72__dead__attribute__((__noreturn__)) void usage(void);
73
74/* Map from mount options to printable formats. */
75static struct opt {
76 int o_opt;
77 int o_silent;
78 const char *o_name;
79 const char *o_optname;
80} optnames[] = {
81 { MNT_ASYNC0x00000040, 0, "asynchronous", "async" },
82 { MNT_DEFEXPORTED0x00000200, 1, "exported to the world", "" },
83 { MNT_EXPORTED0x00000100, 0, "NFS exported", "" },
84 { MNT_EXPORTANON0x00000400, 1, "anon uid mapping", "" },
85 { MNT_EXRDONLY0x00000080, 1, "exported read-only", "" },
86 { MNT_LOCAL0x00001000, 0, "local", "" },
87 { MNT_NOATIME0x00008000, 0, "noatime", "noatime" },
88 { MNT_NODEV0x00000010, 0, "nodev", "nodev" },
89 { MNT_NOEXEC0x00000004, 0, "noexec", "noexec" },
90 { MNT_NOSUID0x00000008, 0, "nosuid", "nosuid" },
91 { MNT_NOPERM0x00000020, 0, "noperm", "noperm" },
92 { MNT_WXALLOWED0x00000800, 0, "wxallowed", "wxallowed" },
93 { MNT_QUOTA0x00002000, 0, "with quotas", "" },
94 { MNT_RDONLY0x00000001, 0, "read-only", "ro" },
95 { MNT_ROOTFS0x00004000, 1, "root file system", "" },
96 { MNT_SYNCHRONOUS0x00000002, 0, "synchronous", "sync" },
97 { MNT_SOFTDEP0x04000000, 0, "softdep", "softdep" },
98 { 0, 0, "", "" }
99};
100
101int
102main(int argc, char * const argv[])
103{
104 const char *mntonname, *vfstype;
105 struct fstab *fs;
106 struct statfs *mntbuf;
107 FILE *mountdfp;
108 pid_t pid;
109 int all, ch, forceall, i, mntsize, rval, new;
110 char *options, mntpath[PATH_MAX1024];
111
112 all = forceall = 0;
113 options = NULL((void *)0);
114 vfstype = "ffs";
115 while ((ch = getopt(argc, argv, "AadfNo:rswt:uv")) != -1)
1
Assuming the condition is false
→
2
←
Loop condition is false. Execution continues on line 165
→
116 switch (ch) {
117 case 'A':
118 all = forceall = 1;
119 break;
120 case 'a':
121 all = 1;
122 break;
123 case 'd':
124 debug = 1;
125 break;
126 case 'f':
127 if (!hasopt(options, "force"))
128 options = catopt(options, "force");
129 break;
130 case 'N':
131 filter = NET_FILTER;
132 break;
133 case 'o':
134 if (*optarg)
135 options = catopt(options, optarg);
136 break;
137 case 'r':
138 if (!hasopt(options, "ro"))
139 options = catopt(options, "ro");
140 break;
141 case 's':
142 skip = 1;
143 break;
144 case 't':
145 if (typelist != NULL((void *)0))
146 errx(1, "only one -t option may be specified.");
147 maketypelist(optarg);
148 vfstype = optarg;
149 break;
150 case 'u':
151 if (!hasopt(options, "update"))
152 options = catopt(options, "update");
153 break;
154 case 'v':
155 verbose = 1;
156 break;
157 case 'w':
158 if (!hasopt(options, "rw"))
159 options = catopt(options, "rw");
160 break;
161 case '?':
162 default:
163 usage();
164 }
165 argc -= optind;
166 argv += optind;
167
168 if (typelist
2.1
'typelist' is equal to NULL
 == NULL((void *)0) && argc == 2) {
3
←
Assuming 'argc' is equal to 2
→
4
←
Taking true branch
→
169 /*
170 * If -t flag has not been specified, and spec contains either
171 * a ':' or a '@' then assume that an NFS filesystem is being
172 * specified ala Sun. If not, check the disklabel for a
173 * known filesystem type.
174 */
175 if (strpbrk(argv[0], ":@") != NULL((void *)0))
5
←
Assuming the condition is true
→
6
←
Taking true branch
→
176 vfstype = "nfs";
177 else {
178 char *labelfs = readlabelfs(argv[0], 0);
179 if (labelfs != NULL((void *)0))
180 vfstype = labelfs;
181 }
182 }
183
184 if (pledge("stdio rpath disklabel proc exec", NULL((void *)0)) == -1)
7
←
Assuming the condition is false
→
8
←
Taking false branch
→
185 err(1, "pledge");
186
187#define BADTYPE(type)(strcmp(type, "ro") && strcmp(type, "rw") && strcmp
(type, "rq")) \
188 (strcmp(type, FSTAB_RO"ro") && \
189 strcmp(type, FSTAB_RW"rw") && strcmp(type, FSTAB_RQ"rq"))
190
191 rval = 0;
192 new = 0;
193 switch (argc) {
9
←
Control jumps to 'case 2:' at line 278
→
194 case 0:
195 if (all)
196 while ((fs = getfsent()) != NULL((void *)0)) {
197 if (BADTYPE(fs->fs_type)(strcmp(fs->fs_type, "ro") && strcmp(fs->fs_type
, "rw") && strcmp(fs->fs_type, "rq")))
198 continue;
199 switch (filter) {
200 case NET_FILTER:
201 if (!hasopt(fs->fs_mntops, "net"))
202 continue;
203 break;
204 case NONET_FILTER:
205 if (hasopt(fs->fs_mntops, "net"))
206 continue;
207 break;
208 }
209 if (!selected(fs->fs_vfstype))
210 continue;
211 if (hasopt(fs->fs_mntops, "noauto"))
212 continue;
213 if (disklabelcheck(fs))
214 continue;
215 if (mountfs(fs->fs_vfstype, fs->fs_spec,
216 fs->fs_file, options,
217 fs->fs_mntops, !forceall))
218 rval = 1;
219 else
220 ++new;
221 }
222 else {
223 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT2)) == 0)
224 err(1, "getmntinfo");
225 for (i = 0; i < mntsize; i++) {
226 if (!selected(mntbuf[i].f_fstypename))
227 continue;
228 prmount(&mntbuf[i]);
229 }
230 return (rval);
231 }
232 break;
233 case 1:
234 if (typelist != NULL((void *)0))
235 usage();
236
237 if (realpath(*argv, mntpath) == NULL((void *)0))
238 strlcpy(mntpath, *argv, sizeof(mntpath));
239 if (hasopt(options, "update")) {
240 if ((mntbuf = getmntpt(mntpath)) == NULL((void *)0))
241 errx(1,
242 "unknown special file or file system %s.",
243 mntpath);
244 if ((mntbuf->f_flags & MNT_ROOTFS0x00004000) &&
245 !strcmp(mntbuf->f_mntfromname, "root_device")) {
246 /* Lookup fstab for name of root device. */
247 fs = getfsfile(mntbuf->f_mntonname);
248 if (fs == NULL((void *)0))
249 errx(1,
250 "can't find fstab entry for %s.",
251 mntpath);
252 } else {
253 if ((fs = malloc(sizeof(*fs))) == NULL((void *)0))
254 err(1, NULL((void *)0));
255 fs->fs_vfstype = mntbuf->f_fstypename;
256 fs->fs_spec = mntbuf->f_mntfromname;
257 }
258 /*
259 * It's an update, ignore the fstab file options.
260 * Get the current options, so we can change only
261 * the options which given via a command line.
262 */
263 fs->fs_mntops = flags2opts(mntbuf->f_flags);
264 mntonname = mntbuf->f_mntonname;
265 } else {
266 if ((fs = getfsfile(mntpath)) == NULL((void *)0) &&
267 (fs = getfsspec(mntpath)) == NULL((void *)0))
268 errx(1, "can't find fstab entry for %s.",
269 mntpath);
270 if (BADTYPE(fs->fs_type)(strcmp(fs->fs_type, "ro") && strcmp(fs->fs_type
, "rw") && strcmp(fs->fs_type, "rq")))
271 errx(1, "%s has unknown file system type.",
272 mntpath);
273 mntonname = fs->fs_file;
274 }
275 rval = mountfs(fs->fs_vfstype, fs->fs_spec,
276 mntonname, options, fs->fs_mntops, skip);
277 break;
278 case 2:
279 rval = mountfs(vfstype, argv[0], argv[1], options, NULL((void *)0), skip);
10
←
Calling 'mountfs'
→
280 break;
281 default:
282 usage();
283 }
284
285 /*
286 * If the mount was successfully, and done by root, tell mountd the
287 * good news. Pid checks are probably unnecessary, but don't hurt.
288 * XXX This should be done from kernel.
289 */
290 if ((rval == 0 || new) && getuid() == 0 &&
291 (mountdfp = fopen(_PATH_MOUNTDPID"/var/run/mountd.pid", "r")) != NULL((void *)0)) {
292 if (fscanf(mountdfp, "%d", &pid) == 1 &&
293 pid > 0 && kill(pid, SIGHUP1) == -1 && errno(*__errno()) != ESRCH3)
294 err(1, "signal mountd");
295 (void)fclose(mountdfp);
296 }
297
298 return (rval);
299}
300
301int
302hasopt(const char *mntopts, const char *option)
303{
304 int found;
305 char *opt, *optbuf;
306
307 if (mntopts == NULL((void *)0))
308 return (0);
309 if ((optbuf = strdup(mntopts)) == NULL((void *)0))
310 err(1, NULL((void *)0));
311 found = 0;
312 for (opt = optbuf; !found && opt != NULL((void *)0); strsep(&opt, ","))
313 found = !strncmp(opt, option, strlen(option));
314 free(optbuf);
315 return (found);
316}
317
318/*
319 * Convert mount(2) flags to list of mount(8) options.
320 */
321char*
322flags2opts(u_int32_t flags)
323{
324 char *optlist;
325 struct opt *p;
326
327 optlist = NULL((void *)0);
328 for (p = optnames; p->o_opt; p++) {
329 if (flags & p->o_opt && *p->o_optname)
330 optlist = catopt(optlist, p->o_optname);
331 }
332
333 return(optlist);
334}
335
336int
337mountfs(const char *vfstype, const char *spec, const char *name,
338 const char *options, const char *mntopts, int skipmounted)
339{
340 char *cp;
341
342 /* List of directories containing mount_xxx subcommands. */
343 static const char *edirs[] = {
344 _PATH_SBIN"/sbin",
345 _PATH_USRSBIN"/usr/sbin",
346 NULL((void *)0)
347 };
348 const char **argv, **edir;
349 struct statfs sf;
350 pid_t pid;
351 int argc, i, status, argvsize;
352 char *optbuf, execname[PATH_MAX1024], mntpath[PATH_MAX1024];
353
354 if (realpath(name, mntpath) == NULL((void *)0)) {
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
355 warn("realpath %s", name);
356 return (1);
357 }
358
359 name = mntpath;
360
361 if (mntopts
12.1
'mntopts' is equal to NULL
 == NULL((void *)0))
13
←
Taking true branch
→
362 mntopts = "";
363
364 if (options
13.1
'options' is equal to NULL
 == NULL((void *)0)) {
14
←
Taking true branch
→
365 if (*mntopts == '\0')
15
←
Taking true branch
→
366 options = "rw";
367 else {
368 options = mntopts;
369 mntopts = "";
370 }
371 }
372
373 /* options follows after mntopts, so they get priority over mntopts */
374 if ((cp = strdup(mntopts)) == NULL((void *)0))
16
←
Assuming the condition is false
→
17
←
Taking false branch
→
375 err(1, NULL((void *)0));
376 optbuf = catopt(cp, options);
18
←
Calling 'catopt'
→
24
←
Returned allocated memory
→
377
378 if (strcmp(name, "/") == 0) {
25
←
Assuming the condition is false
→
26
←
Taking false branch
→
379 if (!hasopt(optbuf, "update"))
380 optbuf = catopt(optbuf, "update");
381 } else if (skipmounted) {
27
←
Assuming 'skipmounted' is not equal to 0
→
28
←
Taking true branch
→
382 if (statfs(name, &sf) == -1) {
29
←
Assuming the condition is true
→
30
←
Taking true branch
→
383 warn("statfs %s", name);
31
←
Potential leak of memory pointed to by 'optbuf'
384 return (1);
385 }
386 /* XXX can't check f_mntfromname, thanks to mfs, etc. */
387 if (strncmp(name, sf.f_mntonname, MNAMELEN90) == 0 &&
388 strncmp(vfstype, sf.f_fstypename, MFSNAMELEN16) == 0) {
389 if (verbose) {
390 printf("%s", sf.f_mntfromname);
391 if (strncmp(sf.f_mntfromname,
392 sf.f_mntfromspec, MNAMELEN90) != 0)
393 printf(" (%s)", sf.f_mntfromspec);
394 printf(" on %s type %.*s: %s\n",
395 sf.f_mntonname,
396 MFSNAMELEN16, sf.f_fstypename,
397 "already mounted");
398 }
399 return (0);
400 }
401 }
402
403 argvsize = 64;
404 if((argv = reallocarray(NULL((void *)0), argvsize, sizeof(char *))) == NULL((void *)0))
405 err(1, NULL((void *)0));
406 argc = 0;
407 argv[argc++] = NULL((void *)0); /* this should be a full path name */
408 mangle(optbuf, &argc, argv, argvsize - 4);
409 argv[argc++] = spec;
410 argv[argc++] = name;
411 argv[argc] = NULL((void *)0);
412
413 if (debug) {
414 (void)printf("exec: mount_%s", vfstype);
415 for (i = 1; i < argc; i++)
416 (void)printf(" %s", argv[i]);
417 (void)printf("\n");
418 free(optbuf);
419 free(argv);
420 return (0);
421 }
422
423 switch ((pid = fork())) {
424 case -1: /* Error. */
425 warn("fork");
426 free(optbuf);
427 free(argv);
428 return (1);
429 case 0: /* Child. */
430 /* Go find an executable. */
431 edir = edirs;
432 do {
433 (void)snprintf(execname,
434 sizeof(execname), "%s/mount_%s", *edir, vfstype);
435 argv[0] = execname;
436 execv(execname, (char * const *)argv);
437 if (errno(*__errno()) != ENOENT2)
438 warn("exec %s for %s", execname, name);
439 } while (*++edir != NULL((void *)0));
440
441 if (errno(*__errno()) == ENOENT2)
442 warn("no mount helper program found for %s", vfstype);
443 _exit(1);
444 default: /* Parent. */
445 free(optbuf);
446 free(argv);
447
448 if (waitpid(pid, &status, 0) == -1) {
449 warn("waitpid");
450 return (1);
451 }
452
453 if (WIFEXITED(status)(((status) & 0177) == 0)) {
454 if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) != 0)
455 return (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff));
456 } else if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177
) != 0)) {
457 warnx("%s: %s", name, strsignal(WTERMSIG(status)(((status) & 0177))));
458 return (1);
459 }
460
461 if (verbose) {
462 if (statfs(name, &sf) == -1) {
463 warn("statfs %s", name);
464 return (1);
465 }
466 prmount(&sf);
467 }
468 break;
469 }
470
471 return (0);
472}
473
474void
475prmount(struct statfs *sf)
476{
477 int flags;
478 struct opt *o;
479 int f = 0;
480
481 printf("%s", sf->f_mntfromname);
482 if (verbose &&
483 strncmp(sf->f_mntfromname, sf->f_mntfromspec, MNAMELEN90) != 0)
484 printf(" (%s)", sf->f_mntfromspec);
485 printf(" on %s type %.*s", sf->f_mntonname,
486 MFSNAMELEN16, sf->f_fstypename);
487
488 flags = sf->f_flags & MNT_VISFLAGMASK0x0400ffff;
489 if (verbose && !(flags & MNT_RDONLY0x00000001))
490 (void)printf("%s%s", !f++ ? " (" : ", ", "rw");
491 for (o = optnames; flags && o->o_opt; o++)
492 if (flags & o->o_opt) {
493 if (!o->o_silent)
494 (void)printf("%s%s", !f++ ? " (" : ", ",
495 o->o_name);
496 flags &= ~o->o_opt;
497 }
498 if (flags)
499 (void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ",
500 flags & (flags - 1) ? "s" : "", flags);
501
502
503 if (verbose) {
504 char buf[26];
505 time_t t = sf->f_ctime;
506
507 ctime_r(&t, buf);
508 buf[24] = '\0';
509 printf(", ctime=%s", buf);
510 }
511
512 /*
513 * Filesystem-specific options
514 * We only print the "interesting" values unless in verbose
515 * mode in order to keep the signal/noise ratio high.
516 */
517 if (strcmp(sf->f_fstypename, MOUNT_NFS"nfs") == 0) {
518 struct protoent *pr;
519 struct nfs_args *nfs_args = &sf->mount_info.nfs_args;
520
521 (void)printf("%s%s", !f++ ? " (" : ", ",
522 (nfs_args->flags & NFSMNT_NFSV30x00000200) ? "v3" : "v2");
523 if (nfs_args->proto && (pr = getprotobynumber(nfs_args->proto)))
524 (void)printf("%s%s", !f++ ? " (" : ", ", pr->p_name);
525 else
526 (void)printf("%s%s", !f++ ? " (" : ", ",
527 (nfs_args->sotype == SOCK_DGRAM2) ? "udp" : "tcp");
528 if (nfs_args->flags & NFSMNT_SOFT0x00000001)
529 (void)printf("%s%s", !f++ ? " (" : ", ", "soft");
530 else if (verbose)
531 (void)printf("%s%s", !f++ ? " (" : ", ", "hard");
532 if (nfs_args->flags & NFSMNT_INT0x00000040)
533 (void)printf("%s%s", !f++ ? " (" : ", ", "intr");
534 if (nfs_args->flags & NFSMNT_NOCONN0x00000080)
535 (void)printf("%s%s", !f++ ? " (" : ", ", "noconn");
536 if (nfs_args->flags & NFSMNT_RDIRPLUS0x00010000)
537 (void)printf("%s%s", !f++ ? " (" : ", ", "rdirplus");
538 if (verbose || nfs_args->wsize != NFS_WSIZE8192)
539 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
540 "wsize", nfs_args->wsize);
541 if (verbose || nfs_args->rsize != NFS_RSIZE8192)
542 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
543 "rsize", nfs_args->rsize);
544 if (verbose || nfs_args->readdirsize != NFS_READDIRSIZE8192)
545 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
546 "rdirsize", nfs_args->readdirsize);
547 if (verbose || nfs_args->timeo != 10) /* XXX */
548 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
549 "timeo", nfs_args->timeo);
550 if (verbose || nfs_args->retrans != NFS_RETRANS10)
551 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
552 "retrans", nfs_args->retrans);
553 if (verbose || nfs_args->maxgrouplist != NFS_MAXGRPS16)
554 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
555 "maxgrouplist", nfs_args->maxgrouplist);
556 if (verbose || nfs_args->readahead != NFS_DEFRAHEAD1)
557 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
558 "readahead", nfs_args->readahead);
559 if (verbose) {
560 (void)printf("%s%s=%d", !f++ ? " (" : ", ",
561 "acregmin", nfs_args->acregmin);
562 (void)printf(", %s=%d",
563 "acregmax", nfs_args->acregmax);
564 (void)printf(", %s=%d",
565 "acdirmin", nfs_args->acdirmin);
566 (void)printf(", %s=%d",
567 "acdirmax", nfs_args->acdirmax);
568 }
569 } else if (strcmp(sf->f_fstypename, MOUNT_MFS"mfs") == 0) {
570 int headerlen;
571 long blocksize;
572 char *header;
573
574 header = getbsize(&headerlen, &blocksize);
575 (void)printf("%s%s=%lu %s", !f++ ? " (" : ", ",
576 "size", sf->mount_info.mfs_args.size / blocksize, header);
577 } else if (strcmp(sf->f_fstypename, MOUNT_MSDOS"msdos") == 0) {
578 struct msdosfs_args *msdosfs_args = &sf->mount_info.msdosfs_args;
579
580 if (verbose || msdosfs_args->uid || msdosfs_args->gid)
581 (void)printf("%s%s=%u, %s=%u", !f++ ? " (" : ", ",
582 "uid", msdosfs_args->uid, "gid", msdosfs_args->gid);
583 if (verbose || msdosfs_args->mask != 0755)
584 (void)printf("%s%s=0%o", !f++ ? " (" : ", ",
585 "mask", msdosfs_args->mask);
586 if (msdosfs_args->flags & MSDOSFSMNT_SHORTNAME0x01)
587 (void)printf("%s%s", !f++ ? " (" : ", ", "short");
588 if (msdosfs_args->flags & MSDOSFSMNT_LONGNAME0x02)
589 (void)printf("%s%s", !f++ ? " (" : ", ", "long");
590 if (msdosfs_args->flags & MSDOSFSMNT_NOWIN950x04)
591 (void)printf("%s%s", !f++ ? " (" : ", ", "nowin95");
592 } else if (strcmp(sf->f_fstypename, MOUNT_CD9660"cd9660") == 0) {
593 struct iso_args *iso_args = &sf->mount_info.iso_args;
594
595 if (iso_args->flags & ISOFSMNT_NORRIP0x00000001)
596 (void)printf("%s%s", !f++ ? " (" : ", ", "norrip");
597 if (iso_args->flags & ISOFSMNT_GENS0x00000002)
598 (void)printf("%s%s", !f++ ? " (" : ", ", "gens");
599 if (iso_args->flags & ISOFSMNT_EXTATT0x00000004)
600 (void)printf("%s%s", !f++ ? " (" : ", ", "extatt");
601 } else if (strcmp(sf->f_fstypename, MOUNT_TMPFS"tmpfs") == 0) {
602 struct tmpfs_args *tmpfs_args = &sf->mount_info.tmpfs_args;
603
604 if (verbose || tmpfs_args->ta_root_uid || tmpfs_args->ta_root_gid)
605 (void)printf("%s%s=%u, %s=%u", !f++ ? " (" : ", ",
606 "uid", tmpfs_args->ta_root_uid, "gid", tmpfs_args->ta_root_gid);
607 if (verbose || tmpfs_args->ta_root_mode != 040755)
608 (void)printf("%s%s=%04o", !f++ ? " (" : ", ",
609 "mode", tmpfs_args->ta_root_mode & 07777);
610 if (verbose || tmpfs_args->ta_size_max)
611 (void)printf("%s%s=%lu", !f++ ? " (" : ", ",
612 "size", (unsigned long)tmpfs_args->ta_size_max);
613 if (verbose || tmpfs_args->ta_nodes_max)
614 (void)printf("%s%s=%lu", !f++ ? " (" : ", ",
615 "inodes", (unsigned long)tmpfs_args->ta_nodes_max);
616 }
617 (void)printf(f ? ")\n" : "\n");
618}
619
620struct statfs *
621getmntpt(const char *name)
622{
623 struct statfs *mntbuf;
624 int i, mntsize;
625
626 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT2);
627 for (i = 0; i < mntsize; i++)
628 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
629 strcmp(mntbuf[i].f_mntonname, name) == 0)
630 return (&mntbuf[i]);
631 return (NULL((void *)0));
632}
633
634static enum { IN_LIST, NOT_IN_LIST } which;
635
636int
637selected(const char *type)
638{
639 char **av;
640
641 /* If no type specified, it's always selected. */
642 if (typelist == NULL((void *)0))
643 return (1);
644 for (av = typelist; *av != NULL((void *)0); ++av)
645 if (!strncmp(type, *av, MFSNAMELEN16))
646 return (which == IN_LIST ? 1 : 0);
647 return (which == IN_LIST ? 0 : 1);
648}
649
650void
651maketypelist(char *fslist)
652{
653 int i;
654 char *nextcp, **av;
655
656 if ((fslist == NULL((void *)0)) || (fslist[0] == '\0'))
657 errx(1, "empty type list");
658
659 /*
660 * XXX
661 * Note: the syntax is "noxxx,yyy" for no xxx's and
662 * no yyy's, not the more intuitive "noxxx,noyyy".
663 */
664 if (fslist[0] == 'n' && fslist[1] == 'o') {
665 fslist += 2;
666 which = NOT_IN_LIST;
667 } else
668 which = IN_LIST;
669
670 /* Count the number of types. */
671 for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++)
672 ++nextcp;
673
674 /* Build an array of that many types. */
675 if ((av = typelist = reallocarray(NULL((void *)0), i + 1, sizeof(char *))) == NULL((void *)0))
676 err(1, NULL((void *)0));
677 av[0] = fslist;
678 for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++) {
679 *nextcp = '\0';
680 av[i] = ++nextcp;
681 }
682 /* Terminate the array. */
683 av[i] = NULL((void *)0);
684}
685
686char *
687catopt(char *s0, const char *s1)
688{
689 char *cp;
690
691 if (s0
18.1
's0' is non-null
 && *s0) {
19
←
Assuming the condition is false
→
20
←
Taking false branch
→
692 if (asprintf(&cp, "%s,%s", s0, s1) == -1)
693 err(1, NULL((void *)0));
694 } else {
695 if ((cp = strdup(s1)) == NULL((void *)0))
21
←
Memory is allocated
→
22
←
Assuming the condition is false
→
23
←
Taking false branch
→
696 err(1, NULL((void *)0));
697 }
698
699 free(s0);
700 return cp;
701}
702
703void
704mangle(char *options, int *argcp, const char **argv, int argcmax)
705{
706 char *p, *s;
707 int argc;
708
709 argcmax -= 2;
710 argc = *argcp;
711 for (s = options; argc <= argcmax && (p = strsep(&s, ",")) != NULL((void *)0);)
712 if (*p != '\0') {
713 if (*p == '-') {
714 argv[argc++] = p;
715 p = strchr(p, '=');
716 if (p) {
717 *p = '\0';
718 argv[argc++] = p + 1;
719 }
720 } else {
721 argv[argc++] = "-o";
722 argv[argc++] = p;
723 }
724 }
725
726 *argcp = argc;
727}
728
729__dead__attribute__((__noreturn__)) void
730usage(void)
731{
732 (void)fprintf(stderr(&__sF[2]),
733 "usage: mount [-AadfNruvw] [-t type]\n"
734 " mount [-dfrsuvw] special | node\n"
735 " mount [-dfruvw] [-o options] [-t type] special node\n");
736 exit(1);
737}
738
739int
740disklabelcheck(struct fstab *fs)
741{
742 char *labelfs;
743
744 if (strcmp(fs->fs_vfstype, "nfs") != 0 ||
745 strpbrk(fs->fs_spec, ":@") == NULL((void *)0)) {
746 labelfs = readlabelfs(fs->fs_spec, 0);
747 if (labelfs == NULL((void *)0) ||
748 strcmp(labelfs, fs->fs_vfstype) == 0)
749 return (0);
750 if (strcmp(fs->fs_vfstype, "ufs") == 0 &&
751 strcmp(labelfs, "ffs") == 0) {
752 warnx("%s: fstab uses outdated type 'ufs' -- fix please",
753 fs->fs_spec);
754 return (0);
755 }
756 if (strcmp(fs->fs_vfstype, "mfs") == 0 &&
757 strcmp(labelfs, "ffs") == 0)
758 return (0);
759 warnx("%s: fstab type %s != disklabel type %s",
760 fs->fs_spec, fs->fs_vfstype, labelfs);
761 return (1);
762 }
763 return (0);
764}