| File: | src/usr.bin/vi/build/../common/exf.c |
| Warning: | line 648, column 11 Access to field 'lno' results in a dereference of a null pointer (loaded from variable 'frp') |
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| 1 | /* $OpenBSD: exf.c,v 1.48 2021/10/25 14:17:24 dv Exp $ */ | ||||||||
| 2 | |||||||||
| 3 | /*- | ||||||||
| 4 | * Copyright (c) 1992, 1993, 1994 | ||||||||
| 5 | * The Regents of the University of California. All rights reserved. | ||||||||
| 6 | * Copyright (c) 1992, 1993, 1994, 1995, 1996 | ||||||||
| 7 | * Keith Bostic. All rights reserved. | ||||||||
| 8 | * | ||||||||
| 9 | * See the LICENSE file for redistribution information. | ||||||||
| 10 | */ | ||||||||
| 11 | |||||||||
| 12 | #include "config.h" | ||||||||
| 13 | |||||||||
| 14 | #include <sys/queue.h> | ||||||||
| 15 | #include <sys/stat.h> | ||||||||
| 16 | #include <sys/time.h> | ||||||||
| 17 | |||||||||
| 18 | /* | ||||||||
| 19 | * We include <sys/file.h>, because the flock(2) and open(2) #defines | ||||||||
| 20 | * were found there on historical systems. We also include <fcntl.h> | ||||||||
| 21 | * because the open(2) #defines are found there on newer systems. | ||||||||
| 22 | */ | ||||||||
| 23 | #include <sys/file.h> | ||||||||
| 24 | |||||||||
| 25 | #include <bitstring.h> | ||||||||
| 26 | #include <dirent.h> | ||||||||
| 27 | #include <errno(*__errno()).h> | ||||||||
| 28 | #include <fcntl.h> | ||||||||
| 29 | #include <limits.h> | ||||||||
| 30 | #include <signal.h> | ||||||||
| 31 | #include <stdio.h> | ||||||||
| 32 | #include <stdlib.h> | ||||||||
| 33 | #include <string.h> | ||||||||
| 34 | #include <time.h> | ||||||||
| 35 | #include <unistd.h> | ||||||||
| 36 | |||||||||
| 37 | #include "common.h" | ||||||||
| 38 | |||||||||
| 39 | static int file_backup(SCR *, char *, char *); | ||||||||
| 40 | static void file_cinit(SCR *); | ||||||||
| 41 | static void file_comment(SCR *); | ||||||||
| 42 | static int file_spath(SCR *, FREF *, struct stat *, int *); | ||||||||
| 43 | |||||||||
| 44 | /* | ||||||||
| 45 | * file_add -- | ||||||||
| 46 | * Insert a file name into the FREF list, if it doesn't already | ||||||||
| 47 | * appear in it. | ||||||||
| 48 | * | ||||||||
| 49 | * !!! | ||||||||
| 50 | * The "if it doesn't already appear" changes vi's semantics slightly. If | ||||||||
| 51 | * you do a "vi foo bar", and then execute "next bar baz", the edit of bar | ||||||||
| 52 | * will reflect the line/column of the previous edit session. Historic nvi | ||||||||
| 53 | * did not do this. The change is a logical extension of the change where | ||||||||
| 54 | * vi now remembers the last location in any file that it has ever edited, | ||||||||
| 55 | * not just the previously edited file. | ||||||||
| 56 | * | ||||||||
| 57 | * PUBLIC: FREF *file_add(SCR *, CHAR_T *); | ||||||||
| 58 | */ | ||||||||
| 59 | FREF * | ||||||||
| 60 | file_add(SCR *sp, CHAR_T *name) | ||||||||
| 61 | { | ||||||||
| 62 | GS *gp; | ||||||||
| 63 | FREF *frp, *tfrp; | ||||||||
| 64 | |||||||||
| 65 | /* | ||||||||
| 66 | * Return it if it already exists. Note that we test against the | ||||||||
| 67 | * user's name, whatever that happens to be, including if it's a | ||||||||
| 68 | * temporary file. | ||||||||
| 69 | * | ||||||||
| 70 | * If the user added a file but was unable to initialize it, there | ||||||||
| 71 | * can be file list entries where the name field is NULL. Discard | ||||||||
| 72 | * them the next time we see them. | ||||||||
| 73 | */ | ||||||||
| 74 | gp = sp->gp; | ||||||||
| 75 | if (name != NULL((void *)0)) | ||||||||
| 76 | TAILQ_FOREACH_SAFE(frp, &gp->frefq, q, tfrp)for ((frp) = ((&gp->frefq)->tqh_first); (frp) != (( void *)0) && ((tfrp) = ((frp)->q.tqe_next), 1); (frp ) = (tfrp)) { | ||||||||
| 77 | if (frp->name == NULL((void *)0)) { | ||||||||
| 78 | TAILQ_REMOVE(&gp->frefq, frp, q)do { if (((frp)->q.tqe_next) != ((void *)0)) (frp)->q.tqe_next ->q.tqe_prev = (frp)->q.tqe_prev; else (&gp->frefq )->tqh_last = (frp)->q.tqe_prev; *(frp)->q.tqe_prev = (frp)->q.tqe_next; ; ; } while (0); | ||||||||
| 79 | free(frp->name); | ||||||||
| 80 | free(frp); | ||||||||
| 81 | continue; | ||||||||
| 82 | } | ||||||||
| 83 | if (!strcmp(frp->name, name)) | ||||||||
| 84 | return (frp); | ||||||||
| 85 | } | ||||||||
| 86 | |||||||||
| 87 | /* Allocate and initialize the FREF structure. */ | ||||||||
| 88 | CALLOC(sp, frp, 1, sizeof(FREF)){ if (((frp) = calloc((1), (sizeof(FREF)))) == ((void *)0)) msgq ((sp), M_SYSERR, ((void *)0)); }; | ||||||||
| 89 | if (frp == NULL((void *)0)) | ||||||||
| 90 | return (NULL((void *)0)); | ||||||||
| 91 | |||||||||
| 92 | /* | ||||||||
| 93 | * If no file name specified, or if the file name is a request | ||||||||
| 94 | * for something temporary, file_init() will allocate the file | ||||||||
| 95 | * name. Temporary files are always ignored. | ||||||||
| 96 | */ | ||||||||
| 97 | if (name != NULL((void *)0) && strcmp(name, TEMPORARY_FILE_STRING"/tmp") && | ||||||||
| 98 | (frp->name = strdup(name)) == NULL((void *)0)) { | ||||||||
| 99 | free(frp); | ||||||||
| 100 | msgq(sp, M_SYSERR, NULL((void *)0)); | ||||||||
| 101 | return (NULL((void *)0)); | ||||||||
| 102 | } | ||||||||
| 103 | |||||||||
| 104 | /* Append into the chain of file names. */ | ||||||||
| 105 | TAILQ_INSERT_TAIL(&gp->frefq, frp, q)do { (frp)->q.tqe_next = ((void *)0); (frp)->q.tqe_prev = (&gp->frefq)->tqh_last; *(&gp->frefq)-> tqh_last = (frp); (&gp->frefq)->tqh_last = &(frp )->q.tqe_next; } while (0); | ||||||||
| 106 | |||||||||
| 107 | return (frp); | ||||||||
| 108 | } | ||||||||
| 109 | |||||||||
| 110 | /* | ||||||||
| 111 | * file_init -- | ||||||||
| 112 | * Start editing a file, based on the FREF structure. If successsful, | ||||||||
| 113 | * let go of any previous file. Don't release the previous file until | ||||||||
| 114 | * absolutely sure we have the new one. | ||||||||
| 115 | * | ||||||||
| 116 | * PUBLIC: int file_init(SCR *, FREF *, char *, int); | ||||||||
| 117 | */ | ||||||||
| 118 | int | ||||||||
| 119 | file_init(SCR *sp, FREF *frp, char *rcv_name, int flags) | ||||||||
| 120 | { | ||||||||
| 121 | EXF *ep; | ||||||||
| 122 | RECNOINFO oinfo; | ||||||||
| 123 | struct stat sb; | ||||||||
| 124 | size_t psize; | ||||||||
| 125 | int fd, exists, open_err, readonly; | ||||||||
| 126 | char *oname, tname[] = "/tmp/vi.XXXXXXXXXX"; | ||||||||
| 127 | |||||||||
| 128 | open_err = readonly = 0; | ||||||||
| 129 | |||||||||
| 130 | /* | ||||||||
| 131 | * If the file is a recovery file, let the recovery code handle it. | ||||||||
| 132 | * Clear the FR_RECOVER flag first -- the recovery code does set up, | ||||||||
| 133 | * and then calls us! If the recovery call fails, it's probably | ||||||||
| 134 | * because the named file doesn't exist. So, move boldly forward, | ||||||||
| 135 | * presuming that there's an error message the user will get to see. | ||||||||
| 136 | */ | ||||||||
| 137 | if (F_ISSET(frp, FR_RECOVER)(((frp)->flags) & ((0x0020)))) { | ||||||||
| |||||||||
| 138 | F_CLR(frp, FR_RECOVER)(((frp)->flags) &= ~((0x0020))); | ||||||||
| 139 | if (rcv_read(sp, frp) == 0) | ||||||||
| 140 | return (0); /* successful recovery */ | ||||||||
| 141 | } | ||||||||
| 142 | |||||||||
| 143 | /* | ||||||||
| 144 | * Required FRP initialization; the only flag we keep is the | ||||||||
| 145 | * cursor information. | ||||||||
| 146 | */ | ||||||||
| 147 | F_CLR(frp, ~FR_CURSORSET)(((frp)->flags) &= ~((~0x0001))); | ||||||||
| 148 | |||||||||
| 149 | /* | ||||||||
| 150 | * Required EXF initialization: | ||||||||
| 151 | * Flush the line caches. | ||||||||
| 152 | * Default recover mail file fd to -1. | ||||||||
| 153 | * Set initial EXF flag bits. | ||||||||
| 154 | */ | ||||||||
| 155 | CALLOC_RET(sp, ep, 1, sizeof(EXF)){ if (((ep) = calloc((1), (sizeof(EXF)))) == ((void *)0)) { msgq ((sp), M_SYSERR, ((void *)0)); return (1); } }; | ||||||||
| 156 | ep->c_lno = ep->c_nlines = OOBLNO0; | ||||||||
| 157 | ep->rcv_fd = ep->fcntl_fd = -1; | ||||||||
| 158 | F_SET(ep, F_FIRSTMODIFY)(((ep)->flags) |= ((0x002))); | ||||||||
| 159 | |||||||||
| 160 | /* | ||||||||
| 161 | * Scan the user's path to find the file that we're going to | ||||||||
| 162 | * try and open. | ||||||||
| 163 | */ | ||||||||
| 164 | if (file_spath(sp, frp, &sb, &exists)) { | ||||||||
| 165 | free(ep); | ||||||||
| 166 | return (1); | ||||||||
| 167 | } | ||||||||
| 168 | |||||||||
| 169 | /* | ||||||||
| 170 | * If no name or backing file, for whatever reason, create a backing | ||||||||
| 171 | * temporary file, saving the temp file name so we can later unlink | ||||||||
| 172 | * it. If the user never named this file, copy the temporary file name | ||||||||
| 173 | * to the real name (we display that until the user renames it). | ||||||||
| 174 | */ | ||||||||
| 175 | oname = frp->name; | ||||||||
| 176 | |||||||||
| 177 | /* | ||||||||
| 178 | * User is editing a named file that doesn't exist yet other than as a | ||||||||
| 179 | * temporary file. | ||||||||
| 180 | */ | ||||||||
| 181 | if (!exists
| ||||||||
| 182 | free(ep); | ||||||||
| 183 | return (1); | ||||||||
| 184 | } | ||||||||
| 185 | |||||||||
| 186 | if (LF_ISSET(FS_OPENERR)((flags) & ((0x008))) || oname
| ||||||||
| 187 | /* | ||||||||
| 188 | * Don't try to create a temporary support file twice. | ||||||||
| 189 | */ | ||||||||
| 190 | if (frp->tname
| ||||||||
| 191 | goto err; | ||||||||
| 192 | fd = mkstemp(tname); | ||||||||
| 193 | if (fd == -1 || fstat(fd, &sb) == -1 || | ||||||||
| 194 | fchmod(fd, S_IRUSR0000400 | S_IWUSR0000200) == -1) { | ||||||||
| 195 | msgq(sp, M_SYSERR, | ||||||||
| 196 | "Unable to create temporary file"); | ||||||||
| 197 | if (fd != -1) { | ||||||||
| 198 | close(fd); | ||||||||
| 199 | (void)unlink(tname); | ||||||||
| 200 | } | ||||||||
| 201 | goto err; | ||||||||
| 202 | } | ||||||||
| 203 | (void)close(fd); | ||||||||
| 204 | |||||||||
| 205 | if (frp->name
| ||||||||
| 206 | F_SET(frp, FR_TMPFILE)(((frp)->flags) |= ((0x0080))); | ||||||||
| 207 | if ((frp->tname = strdup(tname)) == NULL((void *)0) || | ||||||||
| 208 | (frp->name
| ||||||||
| 209 | free(frp->tname); | ||||||||
| 210 | msgq(sp, M_SYSERR, NULL((void *)0)); | ||||||||
| 211 | (void)unlink(tname); | ||||||||
| 212 | goto err; | ||||||||
| 213 | } | ||||||||
| 214 | oname = frp->tname; | ||||||||
| 215 | psize = 1024; | ||||||||
| 216 | if (!LF_ISSET(FS_OPENERR)((flags) & ((0x008)))) | ||||||||
| 217 | F_SET(frp, FR_NEWFILE)(((frp)->flags) |= ((0x0010))); | ||||||||
| 218 | } else { | ||||||||
| 219 | /* | ||||||||
| 220 | * XXX | ||||||||
| 221 | * A seat of the pants calculation: try to keep the file in | ||||||||
| 222 | * 15 pages or less. Don't use a page size larger than 10K | ||||||||
| 223 | * (vi should have good locality) or smaller than 1K. | ||||||||
| 224 | */ | ||||||||
| 225 | psize = ((sb.st_size / 15) + 1023) / 1024; | ||||||||
| 226 | if (psize > 10) | ||||||||
| 227 | psize = 10; | ||||||||
| 228 | if (psize == 0) | ||||||||
| 229 | psize = 1; | ||||||||
| 230 | psize *= 1024; | ||||||||
| 231 | |||||||||
| 232 | if (!S_ISREG(sb.st_mode)((sb.st_mode & 0170000) == 0100000)) | ||||||||
| 233 | msgq_str(sp, M_ERR, oname, | ||||||||
| 234 | "Warning: %s is not a regular file"); | ||||||||
| 235 | } | ||||||||
| 236 | |||||||||
| 237 | /* Save device, inode and modification time. */ | ||||||||
| 238 | F_SET(ep, F_DEVSET)(((ep)->flags) |= ((0x001))); | ||||||||
| 239 | ep->mdev = sb.st_dev; | ||||||||
| 240 | ep->minode = sb.st_ino; | ||||||||
| 241 | |||||||||
| 242 | ep->mtim = sb.st_mtim; | ||||||||
| 243 | |||||||||
| 244 | /* Set up recovery. */ | ||||||||
| 245 | memset(&oinfo, 0, sizeof(RECNOINFO)); | ||||||||
| 246 | oinfo.bval = '\n'; /* Always set. */ | ||||||||
| 247 | oinfo.psize = psize; | ||||||||
| 248 | oinfo.flags = F_ISSET(sp->gp, G_SNAPSHOT)(((sp->gp)->flags) & ((0x0040))) ? R_SNAPSHOT0x04 : 0; | ||||||||
| 249 | if (rcv_name
| ||||||||
| 250 | if (!rcv_tmp(sp, ep, frp->name)) | ||||||||
| 251 | oinfo.bfname = ep->rcv_path; | ||||||||
| 252 | } else { | ||||||||
| 253 | if ((ep->rcv_path = strdup(rcv_name)) == NULL((void *)0)) { | ||||||||
| 254 | msgq(sp, M_SYSERR, NULL((void *)0)); | ||||||||
| 255 | goto err; | ||||||||
| 256 | } | ||||||||
| 257 | oinfo.bfname = ep->rcv_path; | ||||||||
| 258 | F_SET(ep, F_MODIFIED)(((ep)->flags) |= ((0x004))); | ||||||||
| 259 | } | ||||||||
| 260 | |||||||||
| 261 | /* Open a db structure. */ | ||||||||
| 262 | if ((ep->db = dbopen(rcv_name
| ||||||||
| 263 | O_NONBLOCK0x0004 | O_RDONLY0x0000, | ||||||||
| 264 | S_IRUSR0000400 | S_IWUSR0000200 | S_IRGRP0000040 | S_IWGRP0000020 | S_IROTH0000004 | S_IWOTH0000002, | ||||||||
| 265 | DB_RECNO, &oinfo)) == NULL((void *)0)) { | ||||||||
| 266 | msgq_str(sp, | ||||||||
| 267 | M_SYSERR, rcv_name
| ||||||||
| 268 | /* | ||||||||
| 269 | * !!! | ||||||||
| 270 | * Historically, vi permitted users to edit files that couldn't | ||||||||
| 271 | * be read. This isn't useful for single files from a command | ||||||||
| 272 | * line, but it's quite useful for "vi *.c", since you can skip | ||||||||
| 273 | * past files that you can't read. | ||||||||
| 274 | */ | ||||||||
| 275 | open_err = 1; | ||||||||
| 276 | goto oerr; | ||||||||
| 277 | } | ||||||||
| 278 | |||||||||
| 279 | /* | ||||||||
| 280 | * Do the remaining things that can cause failure of the new file, | ||||||||
| 281 | * mark and logging initialization. | ||||||||
| 282 | */ | ||||||||
| 283 | if (mark_init(sp, ep) || log_init(sp, ep)) | ||||||||
| 284 | goto err; | ||||||||
| 285 | |||||||||
| 286 | /* | ||||||||
| 287 | * Set the alternate file name to be the file we're discarding. | ||||||||
| 288 | * | ||||||||
| 289 | * !!! | ||||||||
| 290 | * Temporary files can't become alternate files, so there's no file | ||||||||
| 291 | * name. This matches historical practice, although it could only | ||||||||
| 292 | * happen in historical vi as the result of the initial command, i.e. | ||||||||
| 293 | * if vi was executed without a file name. | ||||||||
| 294 | */ | ||||||||
| 295 | if (LF_ISSET(FS_SETALT)((flags) & ((0x020)))) | ||||||||
| 296 | set_alt_name(sp, sp->frp == NULL((void *)0) || | ||||||||
| 297 | F_ISSET(sp->frp, FR_TMPFILE)(((sp->frp)->flags) & ((0x0080))) ? NULL((void *)0) : sp->frp->name); | ||||||||
| 298 | |||||||||
| 299 | /* | ||||||||
| 300 | * Close the previous file; if that fails, close the new one and run | ||||||||
| 301 | * for the border. | ||||||||
| 302 | * | ||||||||
| 303 | * !!! | ||||||||
| 304 | * There's a nasty special case. If the user edits a temporary file, | ||||||||
| 305 | * and then does an ":e! %", we need to re-initialize the backing | ||||||||
| 306 | * file, but we can't change the name. (It's worse -- we're dealing | ||||||||
| 307 | * with *names* here, we can't even detect that it happened.) Set a | ||||||||
| 308 | * flag so that the file_end routine ignores the backing information | ||||||||
| 309 | * of the old file if it happens to be the same as the new one. | ||||||||
| 310 | * | ||||||||
| 311 | * !!! | ||||||||
| 312 | * Side-effect: after the call to file_end(), sp->frp may be NULL. | ||||||||
| 313 | */ | ||||||||
| 314 | if (sp->ep != NULL((void *)0)) { | ||||||||
| 315 | F_SET(frp, FR_DONTDELETE)(((frp)->flags) |= ((0x0002))); | ||||||||
| 316 | if (file_end(sp, NULL((void *)0), LF_ISSET(FS_FORCE)((flags) & ((0x004))))) { | ||||||||
| 317 | (void)file_end(sp, ep, 1); | ||||||||
| 318 | goto err; | ||||||||
| 319 | } | ||||||||
| 320 | F_CLR(frp, FR_DONTDELETE)(((frp)->flags) &= ~((0x0002))); | ||||||||
| 321 | } | ||||||||
| 322 | |||||||||
| 323 | /* | ||||||||
| 324 | * Lock the file; if it's a recovery file, it should already be | ||||||||
| 325 | * locked. Note, we acquire the lock after the previous file | ||||||||
| 326 | * has been ended, so that we don't get an "already locked" error | ||||||||
| 327 | * for ":edit!". | ||||||||
| 328 | * | ||||||||
| 329 | * XXX | ||||||||
| 330 | * While the user can't interrupt us between the open and here, | ||||||||
| 331 | * there's a race between the dbopen() and the lock. Not much | ||||||||
| 332 | * we can do about it. | ||||||||
| 333 | * | ||||||||
| 334 | * XXX | ||||||||
| 335 | * We don't make a big deal of not being able to lock the file. As | ||||||||
| 336 | * locking rarely works over NFS, and often fails if the file was | ||||||||
| 337 | * mmap(2)'d, it's far too common to do anything like print an error | ||||||||
| 338 | * message, let alone make the file readonly. At some future time, | ||||||||
| 339 | * when locking is a little more reliable, this should change to be | ||||||||
| 340 | * an error. | ||||||||
| 341 | */ | ||||||||
| 342 | if (rcv_name == NULL((void *)0) && !O_ISSET(sp, O_READONLY)((((&(((sp)))->opts[(((O_READONLY)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_READONLY )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_READONLY)) )].o_cur.val)) | ||||||||
| 343 | switch (file_lock(sp, oname, | ||||||||
| 344 | &ep->fcntl_fd, ep->db->fd(ep->db), 0)) { | ||||||||
| 345 | case LOCK_FAILED: | ||||||||
| 346 | F_SET(frp, FR_UNLOCKED)(((frp)->flags) |= ((0x0100))); | ||||||||
| 347 | break; | ||||||||
| 348 | case LOCK_UNAVAIL: | ||||||||
| 349 | readonly = 1; | ||||||||
| 350 | msgq_str(sp, M_INFO, oname, | ||||||||
| 351 | "%s already locked, session is read-only"); | ||||||||
| 352 | break; | ||||||||
| 353 | case LOCK_SUCCESS: | ||||||||
| 354 | break; | ||||||||
| 355 | } | ||||||||
| 356 | |||||||||
| 357 | /* | ||||||||
| 358 | * Historically, the readonly edit option was set per edit buffer in | ||||||||
| 359 | * vi, unless the -R command-line option was specified or the program | ||||||||
| 360 | * was executed as "view". (Well, to be truthful, if the letter 'w' | ||||||||
| 361 | * occurred anywhere in the program name, but let's not get into that.) | ||||||||
| 362 | * So, the persistent readonly state has to be stored in the screen | ||||||||
| 363 | * structure, and the edit option value toggles with the contents of | ||||||||
| 364 | * the edit buffer. If the persistent readonly flag is set, set the | ||||||||
| 365 | * readonly edit option. | ||||||||
| 366 | * | ||||||||
| 367 | * Otherwise, try and figure out if a file is readonly. This is a | ||||||||
| 368 | * dangerous thing to do. The kernel is the only arbiter of whether | ||||||||
| 369 | * or not a file is writeable, and the best that a user program can | ||||||||
| 370 | * do is guess. Obvious loopholes are files that are on a file system | ||||||||
| 371 | * mounted readonly (access catches this one on a few systems), or | ||||||||
| 372 | * alternate protection mechanisms, ACL's for example, that we can't | ||||||||
| 373 | * portably check. Lots of fun, and only here because users whined. | ||||||||
| 374 | * | ||||||||
| 375 | * !!! | ||||||||
| 376 | * Historic vi displayed the readonly message if none of the file | ||||||||
| 377 | * write bits were set, or if an an access(2) call on the path | ||||||||
| 378 | * failed. This seems reasonable. If the file is mode 444, root | ||||||||
| 379 | * users may want to know that the owner of the file did not expect | ||||||||
| 380 | * it to be written. | ||||||||
| 381 | * | ||||||||
| 382 | * Historic vi set the readonly bit if no write bits were set for | ||||||||
| 383 | * a file, even if the access call would have succeeded. This makes | ||||||||
| 384 | * the superuser force the write even when vi expects that it will | ||||||||
| 385 | * succeed. I'm less supportive of this semantic, but it's historic | ||||||||
| 386 | * practice and the conservative approach to vi'ing files as root. | ||||||||
| 387 | * | ||||||||
| 388 | * It would be nice if there was some way to update this when the user | ||||||||
| 389 | * does a "^Z; chmod ...". The problem is that we'd first have to | ||||||||
| 390 | * distinguish between readonly bits set because of file permissions | ||||||||
| 391 | * and those set for other reasons. That's not too hard, but deciding | ||||||||
| 392 | * when to reevaluate the permissions is trickier. An alternative | ||||||||
| 393 | * might be to turn off the readonly bit if the user forces a write | ||||||||
| 394 | * and it succeeds. | ||||||||
| 395 | * | ||||||||
| 396 | * XXX | ||||||||
| 397 | * Access(2) doesn't consider the effective uid/gid values. This | ||||||||
| 398 | * probably isn't a problem for vi when it's running standalone. | ||||||||
| 399 | */ | ||||||||
| 400 | if (readonly || F_ISSET(sp, SC_READONLY)(((sp)->flags) & ((0x00200000))) || | ||||||||
| 401 | (!F_ISSET(frp, FR_NEWFILE)(((frp)->flags) & ((0x0010))) && | ||||||||
| 402 | (!(sb.st_mode & (S_IWUSR0000200 | S_IWGRP0000020 | S_IWOTH0000002)) || | ||||||||
| 403 | access(frp->name, W_OK0x02)))) | ||||||||
| 404 | O_SET(sp, O_READONLY)o_set((sp), (O_READONLY), 0, ((void *)0), 1); | ||||||||
| 405 | else | ||||||||
| 406 | O_CLR(sp, O_READONLY)o_set((sp), (O_READONLY), 0, ((void *)0), 0); | ||||||||
| 407 | |||||||||
| 408 | /* Switch... */ | ||||||||
| 409 | ++ep->refcnt; | ||||||||
| 410 | sp->ep = ep; | ||||||||
| 411 | sp->frp = frp; | ||||||||
| 412 | |||||||||
| 413 | /* Set the initial cursor position, queue initial command. */ | ||||||||
| 414 | file_cinit(sp); | ||||||||
| 415 | |||||||||
| 416 | /* Redraw the screen from scratch, schedule a welcome message. */ | ||||||||
| 417 | F_SET(sp, SC_SCR_REFORMAT | SC_STATUS)(((sp)->flags) |= ((0x00000020 | 0x02000000))); | ||||||||
| 418 | |||||||||
| 419 | return (0); | ||||||||
| 420 | |||||||||
| 421 | err: | ||||||||
| 422 | free(frp->name); | ||||||||
| 423 | frp->name = NULL((void *)0); | ||||||||
| 424 | if (frp->tname != NULL((void *)0)) { | ||||||||
| 425 | (void)unlink(frp->tname); | ||||||||
| 426 | free(frp->tname); | ||||||||
| 427 | frp->tname = NULL((void *)0); | ||||||||
| 428 | } | ||||||||
| 429 | |||||||||
| 430 | oerr: if (F_ISSET(ep, F_RCV_ON)(((ep)->flags) & ((0x040)))) | ||||||||
| 431 | (void)unlink(ep->rcv_path); | ||||||||
| 432 | free(ep->rcv_path); | ||||||||
| 433 | ep->rcv_path = NULL((void *)0); | ||||||||
| 434 | if (ep->db
| ||||||||
| 435 | (void)ep->db->close(ep->db); | ||||||||
| 436 | free(ep); | ||||||||
| 437 | |||||||||
| 438 | return (open_err
| ||||||||
| 439 | file_init(sp, frp, rcv_name, flags | FS_OPENERR0x008) : 1); | ||||||||
| 440 | } | ||||||||
| 441 | |||||||||
| 442 | /* | ||||||||
| 443 | * file_spath -- | ||||||||
| 444 | * Scan the user's path to find the file that we're going to | ||||||||
| 445 | * try and open. | ||||||||
| 446 | */ | ||||||||
| 447 | static int | ||||||||
| 448 | file_spath(SCR *sp, FREF *frp, struct stat *sbp, int *existsp) | ||||||||
| 449 | { | ||||||||
| 450 | CHAR_T savech; | ||||||||
| 451 | size_t len; | ||||||||
| 452 | int found; | ||||||||
| 453 | char *name, *p, *t, path[PATH_MAX1024]; | ||||||||
| 454 | |||||||||
| 455 | /* | ||||||||
| 456 | * If the name is NULL or an explicit reference (i.e., the first | ||||||||
| 457 | * component is . or ..) ignore the O_PATH option. | ||||||||
| 458 | */ | ||||||||
| 459 | name = frp->name; | ||||||||
| 460 | if (name == NULL((void *)0)) { | ||||||||
| 461 | *existsp = 0; | ||||||||
| 462 | return (0); | ||||||||
| 463 | } | ||||||||
| 464 | if (name[0] == '/' || (name[0] == '.' && | ||||||||
| 465 | (name[1] == '/' || (name[1] == '.' && name[2] == '/')))) { | ||||||||
| 466 | *existsp = !stat(name, sbp); | ||||||||
| 467 | return (0); | ||||||||
| 468 | } | ||||||||
| 469 | |||||||||
| 470 | /* Try . */ | ||||||||
| 471 | if (!stat(name, sbp)) { | ||||||||
| 472 | *existsp = 1; | ||||||||
| 473 | return (0); | ||||||||
| 474 | } | ||||||||
| 475 | |||||||||
| 476 | /* Try the O_PATH option values. */ | ||||||||
| 477 | for (found = 0, p = t = O_STR(sp, O_PATH)((((&((sp))->opts[((O_PATH))])->flags) & ((0x01 ))) ? ((sp))->gp->opts[((sp))->opts[((O_PATH))].o_cur .val].o_cur.str : ((sp))->opts[((O_PATH))].o_cur.str);; ++p) | ||||||||
| 478 | if (*p == ':' || *p == '\0') { | ||||||||
| 479 | if (t < p - 1) { | ||||||||
| 480 | savech = *p; | ||||||||
| 481 | *p = '\0'; | ||||||||
| 482 | len = snprintf(path, | ||||||||
| 483 | sizeof(path), "%s/%s", t, name); | ||||||||
| 484 | if (len >= sizeof(path)) | ||||||||
| 485 | len = sizeof(path) - 1; | ||||||||
| 486 | *p = savech; | ||||||||
| 487 | if (!stat(path, sbp)) { | ||||||||
| 488 | found = 1; | ||||||||
| 489 | break; | ||||||||
| 490 | } | ||||||||
| 491 | } | ||||||||
| 492 | t = p + 1; | ||||||||
| 493 | if (*p == '\0') | ||||||||
| 494 | break; | ||||||||
| 495 | } | ||||||||
| 496 | |||||||||
| 497 | /* If we found it, build a new pathname and discard the old one. */ | ||||||||
| 498 | if (found) { | ||||||||
| 499 | MALLOC_RET(sp, p, len + 1){ if (((p) = malloc(len + 1)) == ((void *)0)) { msgq((sp), M_SYSERR , ((void *)0)); return (1); } }; | ||||||||
| 500 | memcpy(p, path, len + 1); | ||||||||
| 501 | free(frp->name); | ||||||||
| 502 | frp->name = p; | ||||||||
| 503 | } | ||||||||
| 504 | *existsp = found; | ||||||||
| 505 | return (0); | ||||||||
| 506 | } | ||||||||
| 507 | |||||||||
| 508 | /* | ||||||||
| 509 | * file_cinit -- | ||||||||
| 510 | * Set up the initial cursor position. | ||||||||
| 511 | */ | ||||||||
| 512 | static void | ||||||||
| 513 | file_cinit(SCR *sp) | ||||||||
| 514 | { | ||||||||
| 515 | GS *gp; | ||||||||
| 516 | MARK m; | ||||||||
| 517 | size_t len; | ||||||||
| 518 | int nb; | ||||||||
| 519 | |||||||||
| 520 | /* Set some basic defaults. */ | ||||||||
| 521 | sp->lno = 1; | ||||||||
| 522 | sp->cno = 0; | ||||||||
| 523 | |||||||||
| 524 | /* | ||||||||
| 525 | * Historically, initial commands (the -c option) weren't executed | ||||||||
| 526 | * until a file was loaded, e.g. "vi +10 nofile", followed by an | ||||||||
| 527 | * :edit or :tag command, would execute the +10 on the file loaded | ||||||||
| 528 | * by the subsequent command, (assuming that it existed). This | ||||||||
| 529 | * applied as well to files loaded using the tag commands, and we | ||||||||
| 530 | * follow that historic practice. Also, all initial commands were | ||||||||
| 531 | * ex commands and were always executed on the last line of the file. | ||||||||
| 532 | * | ||||||||
| 533 | * Otherwise, if no initial command for this file: | ||||||||
| 534 | * If in ex mode, move to the last line, first nonblank character. | ||||||||
| 535 | * If the file has previously been edited, move to the last known | ||||||||
| 536 | * position, and check it for validity. | ||||||||
| 537 | * Otherwise, move to the first line, first nonblank. | ||||||||
| 538 | * | ||||||||
| 539 | * This gets called by the file init code, because we may be in a | ||||||||
| 540 | * file of ex commands and we want to execute them from the right | ||||||||
| 541 | * location in the file. | ||||||||
| 542 | */ | ||||||||
| 543 | nb = 0; | ||||||||
| 544 | gp = sp->gp; | ||||||||
| 545 | if (gp->c_option != NULL((void *)0) && !F_ISSET(sp->frp, FR_NEWFILE)(((sp->frp)->flags) & ((0x0010)))) { | ||||||||
| 546 | if (db_last(sp, &sp->lno)) | ||||||||
| 547 | return; | ||||||||
| 548 | if (sp->lno == 0) { | ||||||||
| 549 | sp->lno = 1; | ||||||||
| 550 | sp->cno = 0; | ||||||||
| 551 | } | ||||||||
| 552 | if (ex_run_str(sp, | ||||||||
| 553 | "-c option", gp->c_option, strlen(gp->c_option), 1, 1)) | ||||||||
| 554 | return; | ||||||||
| 555 | gp->c_option = NULL((void *)0); | ||||||||
| 556 | } else if (F_ISSET(sp, SC_EX)(((sp)->flags) & ((0x00000001)))) { | ||||||||
| 557 | if (db_last(sp, &sp->lno)) | ||||||||
| 558 | return; | ||||||||
| 559 | if (sp->lno == 0) { | ||||||||
| 560 | sp->lno = 1; | ||||||||
| 561 | sp->cno = 0; | ||||||||
| 562 | return; | ||||||||
| 563 | } | ||||||||
| 564 | nb = 1; | ||||||||
| 565 | } else { | ||||||||
| 566 | if (F_ISSET(sp->frp, FR_CURSORSET)(((sp->frp)->flags) & ((0x0001)))) { | ||||||||
| 567 | sp->lno = sp->frp->lno; | ||||||||
| 568 | sp->cno = sp->frp->cno; | ||||||||
| 569 | |||||||||
| 570 | /* If returning to a file in vi, center the line. */ | ||||||||
| 571 | F_SET(sp, SC_SCR_CENTER)(((sp)->flags) |= ((0x00000080))); | ||||||||
| 572 | } else { | ||||||||
| 573 | if (O_ISSET(sp, O_COMMENT)((((&(((sp)))->opts[(((O_COMMENT)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_COMMENT )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_COMMENT))) ].o_cur.val)) | ||||||||
| 574 | file_comment(sp); | ||||||||
| 575 | else | ||||||||
| 576 | sp->lno = 1; | ||||||||
| 577 | nb = 1; | ||||||||
| 578 | } | ||||||||
| 579 | if (db_get(sp, sp->lno, 0, NULL((void *)0), &len)) { | ||||||||
| 580 | sp->lno = 1; | ||||||||
| 581 | sp->cno = 0; | ||||||||
| 582 | return; | ||||||||
| 583 | } | ||||||||
| 584 | if (!nb && sp->cno > len) | ||||||||
| 585 | nb = 1; | ||||||||
| 586 | } | ||||||||
| 587 | if (nb) { | ||||||||
| 588 | sp->cno = 0; | ||||||||
| 589 | (void)nonblank(sp, sp->lno, &sp->cno); | ||||||||
| 590 | } | ||||||||
| 591 | |||||||||
| 592 | /* | ||||||||
| 593 | * !!! | ||||||||
| 594 | * The initial column is also the most attractive column. | ||||||||
| 595 | */ | ||||||||
| 596 | sp->rcm = sp->cno; | ||||||||
| 597 | |||||||||
| 598 | /* | ||||||||
| 599 | * !!! | ||||||||
| 600 | * Historically, vi initialized the absolute mark, but ex did not. | ||||||||
| 601 | * Which meant, that if the first command in ex mode was "visual", | ||||||||
| 602 | * or if an ex command was executed first (e.g. vi +10 file) vi was | ||||||||
| 603 | * entered without the mark being initialized. For consistency, if | ||||||||
| 604 | * the file isn't empty, we initialize it for everyone, believing | ||||||||
| 605 | * that it can't hurt, and is generally useful. Not initializing it | ||||||||
| 606 | * if the file is empty is historic practice, although it has always | ||||||||
| 607 | * been possible to set (and use) marks in empty vi files. | ||||||||
| 608 | */ | ||||||||
| 609 | m.lno = sp->lno; | ||||||||
| 610 | m.cno = sp->cno; | ||||||||
| 611 | (void)mark_set(sp, ABSMARK1'\'', &m, 0); | ||||||||
| 612 | } | ||||||||
| 613 | |||||||||
| 614 | /* | ||||||||
| 615 | * file_end -- | ||||||||
| 616 | * Stop editing a file. | ||||||||
| 617 | * | ||||||||
| 618 | * PUBLIC: int file_end(SCR *, EXF *, int); | ||||||||
| 619 | */ | ||||||||
| 620 | int | ||||||||
| 621 | file_end(SCR *sp, EXF *ep, int force) | ||||||||
| 622 | { | ||||||||
| 623 | FREF *frp; | ||||||||
| 624 | |||||||||
| 625 | /* | ||||||||
| 626 | * !!! | ||||||||
| 627 | * ep MAY NOT BE THE SAME AS sp->ep, DON'T USE THE LATTER. | ||||||||
| 628 | * (If argument ep is NULL, use sp->ep.) | ||||||||
| 629 | * | ||||||||
| 630 | * If multiply referenced, just decrement the count and return. | ||||||||
| 631 | */ | ||||||||
| 632 | if (ep
| ||||||||
| 633 | ep = sp->ep; | ||||||||
| 634 | if (--ep->refcnt != 0) | ||||||||
| 635 | return (0); | ||||||||
| 636 | |||||||||
| 637 | /* | ||||||||
| 638 | * | ||||||||
| 639 | * Clean up the FREF structure. | ||||||||
| 640 | * | ||||||||
| 641 | * Save the cursor location. | ||||||||
| 642 | * | ||||||||
| 643 | * XXX | ||||||||
| 644 | * It would be cleaner to do this somewhere else, but by the time | ||||||||
| 645 | * ex or vi knows that we're changing files it's already happened. | ||||||||
| 646 | */ | ||||||||
| 647 | frp = sp->frp; | ||||||||
| 648 | frp->lno = sp->lno; | ||||||||
| |||||||||
| 649 | frp->cno = sp->cno; | ||||||||
| 650 | F_SET(frp, FR_CURSORSET)(((frp)->flags) |= ((0x0001))); | ||||||||
| 651 | |||||||||
| 652 | /* | ||||||||
| 653 | * We may no longer need the temporary backing file, so clean it | ||||||||
| 654 | * up. We don't need the FREF structure either, if the file was | ||||||||
| 655 | * never named, so lose it. | ||||||||
| 656 | * | ||||||||
| 657 | * !!! | ||||||||
| 658 | * Re: FR_DONTDELETE, see the comment above in file_init(). | ||||||||
| 659 | */ | ||||||||
| 660 | if (!F_ISSET(frp, FR_DONTDELETE)(((frp)->flags) & ((0x0002))) && frp->tname != NULL((void *)0)) { | ||||||||
| 661 | if (unlink(frp->tname)) | ||||||||
| 662 | msgq_str(sp, M_SYSERR, frp->tname, "%s: remove"); | ||||||||
| 663 | free(frp->tname); | ||||||||
| 664 | frp->tname = NULL((void *)0); | ||||||||
| 665 | if (F_ISSET(frp, FR_TMPFILE)(((frp)->flags) & ((0x0080)))) { | ||||||||
| 666 | TAILQ_REMOVE(&sp->gp->frefq, frp, q)do { if (((frp)->q.tqe_next) != ((void *)0)) (frp)->q.tqe_next ->q.tqe_prev = (frp)->q.tqe_prev; else (&sp->gp-> frefq)->tqh_last = (frp)->q.tqe_prev; *(frp)->q.tqe_prev = (frp)->q.tqe_next; ; ; } while (0); | ||||||||
| 667 | free(frp->name); | ||||||||
| 668 | free(frp); | ||||||||
| 669 | } | ||||||||
| 670 | sp->frp = NULL((void *)0); | ||||||||
| 671 | } | ||||||||
| 672 | |||||||||
| 673 | /* | ||||||||
| 674 | * Clean up the EXF structure. | ||||||||
| 675 | * | ||||||||
| 676 | * Close the db structure. | ||||||||
| 677 | */ | ||||||||
| 678 | if (ep->db->close != NULL((void *)0) && ep->db->close(ep->db) && !force) { | ||||||||
| 679 | msgq_str(sp, M_SYSERR, frp->name, "%s: close"); | ||||||||
| 680 | ++ep->refcnt; | ||||||||
| 681 | return (1); | ||||||||
| 682 | } | ||||||||
| 683 | |||||||||
| 684 | /* COMMITTED TO THE CLOSE. THERE'S NO GOING BACK... */ | ||||||||
| 685 | |||||||||
| 686 | /* Stop logging. */ | ||||||||
| 687 | (void)log_end(sp, ep); | ||||||||
| 688 | |||||||||
| 689 | /* Free up any marks. */ | ||||||||
| 690 | (void)mark_end(sp, ep); | ||||||||
| 691 | |||||||||
| 692 | /* | ||||||||
| 693 | * Delete recovery files, close the open descriptor, free recovery | ||||||||
| 694 | * memory. See recover.c for a description of the protocol. | ||||||||
| 695 | * | ||||||||
| 696 | * XXX | ||||||||
| 697 | * Unlink backup file first, we can detect that the recovery file | ||||||||
| 698 | * doesn't reference anything when the user tries to recover it. | ||||||||
| 699 | * There's a race, here, obviously, but it's fairly small. | ||||||||
| 700 | */ | ||||||||
| 701 | if (!F_ISSET(ep, F_RCV_NORM)(((ep)->flags) & ((0x020)))) { | ||||||||
| 702 | if (ep->rcv_path != NULL((void *)0) && unlink(ep->rcv_path)) | ||||||||
| 703 | msgq_str(sp, M_SYSERR, ep->rcv_path, "%s: remove"); | ||||||||
| 704 | if (ep->rcv_mpath != NULL((void *)0) && unlink(ep->rcv_mpath)) | ||||||||
| 705 | msgq_str(sp, M_SYSERR, ep->rcv_mpath, "%s: remove"); | ||||||||
| 706 | } | ||||||||
| 707 | if (ep->fcntl_fd != -1) | ||||||||
| 708 | (void)close(ep->fcntl_fd); | ||||||||
| 709 | if (ep->rcv_fd != -1) | ||||||||
| 710 | (void)close(ep->rcv_fd); | ||||||||
| 711 | free(ep->rcv_path); | ||||||||
| 712 | free(ep->rcv_mpath); | ||||||||
| 713 | free(ep); | ||||||||
| 714 | return (0); | ||||||||
| 715 | } | ||||||||
| 716 | |||||||||
| 717 | /* | ||||||||
| 718 | * file_write -- | ||||||||
| 719 | * Write the file to disk. Historic vi had fairly convoluted | ||||||||
| 720 | * semantics for whether or not writes would happen. That's | ||||||||
| 721 | * why all the flags. | ||||||||
| 722 | * | ||||||||
| 723 | * PUBLIC: int file_write(SCR *, MARK *, MARK *, char *, int); | ||||||||
| 724 | */ | ||||||||
| 725 | int | ||||||||
| 726 | file_write(SCR *sp, MARK *fm, MARK *tm, char *name, int flags) | ||||||||
| 727 | { | ||||||||
| 728 | enum { NEWFILE, OLDFILE } mtype; | ||||||||
| 729 | struct stat sb; | ||||||||
| 730 | EXF *ep; | ||||||||
| 731 | FILE *fp; | ||||||||
| 732 | FREF *frp; | ||||||||
| 733 | MARK from, to; | ||||||||
| 734 | size_t len; | ||||||||
| 735 | u_long nlno, nch; | ||||||||
| 736 | int fd, nf, noname, oflags, rval; | ||||||||
| 737 | char *p, *s, *t, buf[PATH_MAX1024 + 64]; | ||||||||
| 738 | const char *msgstr; | ||||||||
| 739 | |||||||||
| 740 | ep = sp->ep; | ||||||||
| 741 | frp = sp->frp; | ||||||||
| 742 | |||||||||
| 743 | /* | ||||||||
| 744 | * Writing '%', or naming the current file explicitly, has the | ||||||||
| 745 | * same semantics as writing without a name. | ||||||||
| 746 | */ | ||||||||
| 747 | if (name == NULL((void *)0) || !strcmp(name, frp->name)) { | ||||||||
| 748 | noname = 1; | ||||||||
| 749 | name = frp->name; | ||||||||
| 750 | } else | ||||||||
| 751 | noname = 0; | ||||||||
| 752 | |||||||||
| 753 | /* Can't write files marked read-only, unless forced. */ | ||||||||
| 754 | if (!LF_ISSET(FS_FORCE)((flags) & ((0x004))) && noname && O_ISSET(sp, O_READONLY)((((&(((sp)))->opts[(((O_READONLY)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_READONLY )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_READONLY)) )].o_cur.val)) { | ||||||||
| 755 | msgq(sp, M_ERR, LF_ISSET(FS_POSSIBLE)((flags) & ((0x010))) ? | ||||||||
| 756 | "Read-only file, not written; use ! to override" : | ||||||||
| 757 | "Read-only file, not written"); | ||||||||
| 758 | return (1); | ||||||||
| 759 | } | ||||||||
| 760 | |||||||||
| 761 | /* If not forced, not appending, and "writeany" not set ... */ | ||||||||
| 762 | if (!LF_ISSET(FS_FORCE | FS_APPEND)((flags) & ((0x004 | 0x002))) && !O_ISSET(sp, O_WRITEANY)((((&(((sp)))->opts[(((O_WRITEANY)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_WRITEANY )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_WRITEANY)) )].o_cur.val)) { | ||||||||
| 763 | /* Don't overwrite anything but the original file. */ | ||||||||
| 764 | if ((!noname || F_ISSET(frp, FR_NAMECHANGE)(((frp)->flags) & ((0x0008)))) && | ||||||||
| 765 | !stat(name, &sb)) { | ||||||||
| 766 | msgq_str(sp, M_ERR, name, | ||||||||
| 767 | LF_ISSET(FS_POSSIBLE)((flags) & ((0x010))) ? | ||||||||
| 768 | "%s exists, not written; use ! to override" : | ||||||||
| 769 | "%s exists, not written"); | ||||||||
| 770 | return (1); | ||||||||
| 771 | } | ||||||||
| 772 | |||||||||
| 773 | /* | ||||||||
| 774 | * Don't write part of any existing file. Only test for the | ||||||||
| 775 | * original file, the previous test catches anything else. | ||||||||
| 776 | */ | ||||||||
| 777 | if (!LF_ISSET(FS_ALL)((flags) & ((0x001))) && noname && !stat(name, &sb)) { | ||||||||
| 778 | msgq(sp, M_ERR, LF_ISSET(FS_POSSIBLE)((flags) & ((0x010))) ? | ||||||||
| 779 | "Partial file, not written; use ! to override" : | ||||||||
| 780 | "Partial file, not written"); | ||||||||
| 781 | return (1); | ||||||||
| 782 | } | ||||||||
| 783 | } | ||||||||
| 784 | |||||||||
| 785 | /* | ||||||||
| 786 | * Figure out if the file already exists -- if it doesn't, we display | ||||||||
| 787 | * the "new file" message. The stat might not be necessary, but we | ||||||||
| 788 | * just repeat it because it's easier than hacking the previous tests. | ||||||||
| 789 | * The information is only used for the user message and modification | ||||||||
| 790 | * time test, so we can ignore the obvious race condition. | ||||||||
| 791 | * | ||||||||
| 792 | * One final test. If we're not forcing or appending the current file, | ||||||||
| 793 | * and we have a saved modification time, object if the file changed | ||||||||
| 794 | * since we last edited or wrote it, and make them force it. | ||||||||
| 795 | */ | ||||||||
| 796 | if (stat(name, &sb)) | ||||||||
| 797 | mtype = NEWFILE; | ||||||||
| 798 | else { | ||||||||
| 799 | if (noname && !LF_ISSET(FS_FORCE | FS_APPEND)((flags) & ((0x004 | 0x002))) && | ||||||||
| 800 | ((F_ISSET(ep, F_DEVSET)(((ep)->flags) & ((0x001))) && | ||||||||
| 801 | (sb.st_dev != ep->mdev || sb.st_ino != ep->minode)) || | ||||||||
| 802 | timespeccmp(&sb.st_mtim, &ep->mtim, !=)(((&sb.st_mtim)->tv_sec == (&ep->mtim)->tv_sec ) ? ((&sb.st_mtim)->tv_nsec != (&ep->mtim)-> tv_nsec) : ((&sb.st_mtim)->tv_sec != (&ep->mtim )->tv_sec)))) { | ||||||||
| 803 | msgq_str(sp, M_ERR, name, LF_ISSET(FS_POSSIBLE)((flags) & ((0x010))) ? | ||||||||
| 804 | "%s: file modified more recently than this copy; use ! to override" : | ||||||||
| 805 | "%s: file modified more recently than this copy"); | ||||||||
| 806 | return (1); | ||||||||
| 807 | } | ||||||||
| 808 | |||||||||
| 809 | mtype = OLDFILE; | ||||||||
| 810 | } | ||||||||
| 811 | |||||||||
| 812 | /* Set flags to create, write, and either append or truncate. */ | ||||||||
| 813 | oflags = O_CREAT0x0200 | O_WRONLY0x0001 | | ||||||||
| 814 | (LF_ISSET(FS_APPEND)((flags) & ((0x002))) ? O_APPEND0x0008 : O_TRUNC0x0400); | ||||||||
| 815 | |||||||||
| 816 | /* Backup the file if requested. */ | ||||||||
| 817 | if (!opts_empty(sp, O_BACKUP, 1) && | ||||||||
| 818 | file_backup(sp, name, O_STR(sp, O_BACKUP)((((&((sp))->opts[((O_BACKUP))])->flags) & ((0x01 ))) ? ((sp))->gp->opts[((sp))->opts[((O_BACKUP))].o_cur .val].o_cur.str : ((sp))->opts[((O_BACKUP))].o_cur.str)) && !LF_ISSET(FS_FORCE)((flags) & ((0x004)))) | ||||||||
| 819 | return (1); | ||||||||
| 820 | |||||||||
| 821 | /* Open the file. */ | ||||||||
| 822 | if ((fd = open(name, oflags, | ||||||||
| 823 | S_IRUSR0000400 | S_IWUSR0000200 | S_IRGRP0000040 | S_IWGRP0000020 | S_IROTH0000004 | S_IWOTH0000002)) < 0) { | ||||||||
| 824 | msgq_str(sp, M_SYSERR, name, "%s"); | ||||||||
| 825 | return (1); | ||||||||
| 826 | } | ||||||||
| 827 | |||||||||
| 828 | /* Try and get a lock. */ | ||||||||
| 829 | if (!noname && file_lock(sp, NULL((void *)0), NULL((void *)0), fd, 0) == LOCK_UNAVAIL) | ||||||||
| 830 | msgq_str(sp, M_ERR, name, | ||||||||
| 831 | "%s: write lock was unavailable"); | ||||||||
| 832 | |||||||||
| 833 | /* | ||||||||
| 834 | * Use stdio for buffering. | ||||||||
| 835 | * | ||||||||
| 836 | * XXX | ||||||||
| 837 | * SVR4.2 requires the fdopen mode exactly match the original open | ||||||||
| 838 | * mode, i.e. you have to open with "a" if appending. | ||||||||
| 839 | */ | ||||||||
| 840 | if ((fp = fdopen(fd, LF_ISSET(FS_APPEND)((flags) & ((0x002))) ? "a" : "w")) == NULL((void *)0)) { | ||||||||
| 841 | msgq_str(sp, M_SYSERR, name, "%s"); | ||||||||
| 842 | (void)close(fd); | ||||||||
| 843 | return (1); | ||||||||
| 844 | } | ||||||||
| 845 | |||||||||
| 846 | /* Build fake addresses, if necessary. */ | ||||||||
| 847 | if (fm == NULL((void *)0)) { | ||||||||
| 848 | from.lno = 1; | ||||||||
| 849 | from.cno = 0; | ||||||||
| 850 | fm = &from; | ||||||||
| 851 | if (db_last(sp, &to.lno)) | ||||||||
| 852 | return (1); | ||||||||
| 853 | to.cno = 0; | ||||||||
| 854 | tm = &to; | ||||||||
| 855 | } | ||||||||
| 856 | |||||||||
| 857 | rval = ex_writefp(sp, name, fp, fm, tm, &nlno, &nch, 0); | ||||||||
| 858 | |||||||||
| 859 | /* | ||||||||
| 860 | * Save the new last modification time -- even if the write fails | ||||||||
| 861 | * we re-init the time. That way the user can clean up the disk | ||||||||
| 862 | * and rewrite without having to force it. | ||||||||
| 863 | */ | ||||||||
| 864 | if (noname) { | ||||||||
| 865 | if (stat(name, &sb)) | ||||||||
| 866 | (void)clock_gettime(CLOCK_REALTIME0, &ep->mtim); | ||||||||
| 867 | else { | ||||||||
| 868 | F_SET(ep, F_DEVSET)(((ep)->flags) |= ((0x001))); | ||||||||
| 869 | ep->mdev = sb.st_dev; | ||||||||
| 870 | ep->minode = sb.st_ino; | ||||||||
| 871 | |||||||||
| 872 | ep->mtim = sb.st_mtim; | ||||||||
| 873 | } | ||||||||
| 874 | } | ||||||||
| 875 | |||||||||
| 876 | /* | ||||||||
| 877 | * If the write failed, complain loudly. ex_writefp() has already | ||||||||
| 878 | * complained about the actual error, reinforce it if data was lost. | ||||||||
| 879 | */ | ||||||||
| 880 | if (rval) { | ||||||||
| 881 | if (!LF_ISSET(FS_APPEND)((flags) & ((0x002)))) | ||||||||
| 882 | msgq_str(sp, M_ERR, name, | ||||||||
| 883 | "%s: WARNING: FILE TRUNCATED"); | ||||||||
| 884 | return (1); | ||||||||
| 885 | } | ||||||||
| 886 | |||||||||
| 887 | /* | ||||||||
| 888 | * Once we've actually written the file, it doesn't matter that the | ||||||||
| 889 | * file name was changed -- if it was, we've already whacked it. | ||||||||
| 890 | */ | ||||||||
| 891 | F_CLR(frp, FR_NAMECHANGE)(((frp)->flags) &= ~((0x0008))); | ||||||||
| 892 | |||||||||
| 893 | /* | ||||||||
| 894 | * If wrote the entire file, and it wasn't by appending it to a file, | ||||||||
| 895 | * clear the modified bit. If the file was written to the original | ||||||||
| 896 | * file name and the file is a temporary, set the "no exit" bit. This | ||||||||
| 897 | * permits the user to write the file and use it in the context of the | ||||||||
| 898 | * filesystem, but still keeps them from discarding their changes by | ||||||||
| 899 | * exiting. | ||||||||
| 900 | */ | ||||||||
| 901 | if (LF_ISSET(FS_ALL)((flags) & ((0x001))) && !LF_ISSET(FS_APPEND)((flags) & ((0x002)))) { | ||||||||
| 902 | F_CLR(ep, F_MODIFIED)(((ep)->flags) &= ~((0x004))); | ||||||||
| 903 | if (F_ISSET(frp, FR_TMPFILE)(((frp)->flags) & ((0x0080)))) { | ||||||||
| 904 | if (noname) | ||||||||
| 905 | F_SET(frp, FR_TMPEXIT)(((frp)->flags) |= ((0x0040))); | ||||||||
| 906 | else | ||||||||
| 907 | F_CLR(frp, FR_TMPEXIT)(((frp)->flags) &= ~((0x0040))); | ||||||||
| 908 | } | ||||||||
| 909 | } | ||||||||
| 910 | |||||||||
| 911 | p = msg_print(sp, name, &nf); | ||||||||
| 912 | switch (mtype) { | ||||||||
| 913 | case NEWFILE: | ||||||||
| 914 | len = snprintf(buf, sizeof(buf), | ||||||||
| 915 | "%s: new file: %lu lines, %lu characters", p, nlno, nch); | ||||||||
| 916 | if (len >= sizeof(buf)) | ||||||||
| 917 | len = sizeof(buf) - 1; | ||||||||
| 918 | break; | ||||||||
| 919 | case OLDFILE: | ||||||||
| 920 | msgstr = LF_ISSET(FS_APPEND)((flags) & ((0x002))) ? | ||||||||
| 921 | "%s: appended: %lu lines, %lu characters" : | ||||||||
| 922 | "%s: %lu lines, %lu characters"; | ||||||||
| 923 | len = snprintf(buf, sizeof(buf), msgstr, p, nlno, nch); | ||||||||
| 924 | if (len >= sizeof(buf)) | ||||||||
| 925 | len = sizeof(buf) - 1; | ||||||||
| 926 | break; | ||||||||
| 927 | default: | ||||||||
| 928 | abort(); | ||||||||
| 929 | } | ||||||||
| 930 | |||||||||
| 931 | /* | ||||||||
| 932 | * There's a nasty problem with long path names. Tags files | ||||||||
| 933 | * can result in long paths and vi will request a continuation key from | ||||||||
| 934 | * the user. Unfortunately, the user has typed ahead, and chaos will | ||||||||
| 935 | * result. If we assume that the characters in the filenames only take | ||||||||
| 936 | * a single screen column each, we can trim the filename. | ||||||||
| 937 | */ | ||||||||
| 938 | s = buf; | ||||||||
| 939 | if (len >= sp->cols) { | ||||||||
| 940 | for (s = buf, t = buf + strlen(p); s < t && | ||||||||
| 941 | (*s != '/' || len >= sp->cols - 3); ++s, --len); | ||||||||
| 942 | if (s == t) | ||||||||
| 943 | s = buf; | ||||||||
| 944 | else { | ||||||||
| 945 | *--s = '.'; /* Leading ellipses. */ | ||||||||
| 946 | *--s = '.'; | ||||||||
| 947 | *--s = '.'; | ||||||||
| 948 | } | ||||||||
| 949 | } | ||||||||
| 950 | msgq(sp, M_INFO, "%s", s); | ||||||||
| 951 | if (nf) | ||||||||
| 952 | FREE_SPACE(sp, p, 0){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (p) == L__gp->tmp_bp ) (((L__gp)->flags) &= ~((0x0100))); else free(p); }; | ||||||||
| 953 | return (0); | ||||||||
| 954 | } | ||||||||
| 955 | |||||||||
| 956 | /* | ||||||||
| 957 | * file_backup -- | ||||||||
| 958 | * Backup the about-to-be-written file. | ||||||||
| 959 | * | ||||||||
| 960 | * XXX | ||||||||
| 961 | * We do the backup by copying the entire file. It would be nice to do | ||||||||
| 962 | * a rename instead, but: (1) both files may not fit and we want to fail | ||||||||
| 963 | * before doing the rename; (2) the backup file may not be on the same | ||||||||
| 964 | * disk partition as the file being written; (3) there may be optional | ||||||||
| 965 | * file information (MACs, DACs, whatever) that we won't get right if we | ||||||||
| 966 | * recreate the file. So, let's not risk it. | ||||||||
| 967 | */ | ||||||||
| 968 | static int | ||||||||
| 969 | file_backup(SCR *sp, char *name, char *bname) | ||||||||
| 970 | { | ||||||||
| 971 | struct dirent *dp; | ||||||||
| 972 | struct stat sb; | ||||||||
| 973 | DIR *dirp; | ||||||||
| 974 | EXCMD cmd; | ||||||||
| 975 | off_t off; | ||||||||
| 976 | size_t blen; | ||||||||
| 977 | int flags, maxnum, nr, num, nw, rfd, wfd, version; | ||||||||
| 978 | char *bp, *estr, *p, *pct, *slash, *t, *wfname, buf[8192]; | ||||||||
| 979 | |||||||||
| 980 | rfd = wfd = -1; | ||||||||
| 981 | bp = estr = wfname = NULL((void *)0); | ||||||||
| 982 | |||||||||
| 983 | /* | ||||||||
| 984 | * Open the current file for reading. Do this first, so that | ||||||||
| 985 | * we don't exec a shell before the most likely failure point. | ||||||||
| 986 | * If it doesn't exist, it's okay, there's just nothing to back | ||||||||
| 987 | * up. | ||||||||
| 988 | */ | ||||||||
| 989 | errno(*__errno()) = 0; | ||||||||
| 990 | if ((rfd = open(name, O_RDONLY0x0000)) < 0) { | ||||||||
| 991 | if (errno(*__errno()) == ENOENT2) | ||||||||
| 992 | return (0); | ||||||||
| 993 | estr = name; | ||||||||
| 994 | goto err; | ||||||||
| 995 | } | ||||||||
| 996 | |||||||||
| 997 | /* | ||||||||
| 998 | * If the name starts with an 'N' character, add a version number | ||||||||
| 999 | * to the name. Strip the leading N from the string passed to the | ||||||||
| 1000 | * expansion routines, for no particular reason. It would be nice | ||||||||
| 1001 | * to permit users to put the version number anywhere in the backup | ||||||||
| 1002 | * name, but there isn't a special character that we can use in the | ||||||||
| 1003 | * name, and giving a new character a special meaning leads to ugly | ||||||||
| 1004 | * hacks both here and in the supporting ex routines. | ||||||||
| 1005 | * | ||||||||
| 1006 | * Shell and file name expand the option's value. | ||||||||
| 1007 | */ | ||||||||
| 1008 | argv_init(sp, &cmd); | ||||||||
| 1009 | ex_cinit(&cmd, 0, 0, 0, 0, 0, NULL((void *)0)); | ||||||||
| 1010 | if (bname[0] == 'N') { | ||||||||
| 1011 | version = 1; | ||||||||
| 1012 | ++bname; | ||||||||
| 1013 | } else | ||||||||
| 1014 | version = 0; | ||||||||
| 1015 | if (argv_exp2(sp, &cmd, bname, strlen(bname))) | ||||||||
| 1016 | return (1); | ||||||||
| 1017 | |||||||||
| 1018 | /* | ||||||||
| 1019 | * 0 args: impossible. | ||||||||
| 1020 | * 1 args: use it. | ||||||||
| 1021 | * >1 args: object, too many args. | ||||||||
| 1022 | */ | ||||||||
| 1023 | if (cmd.argc != 1) { | ||||||||
| 1024 | msgq_str(sp, M_ERR, bname, | ||||||||
| 1025 | "%s expanded into too many file names"); | ||||||||
| 1026 | (void)close(rfd); | ||||||||
| 1027 | return (1); | ||||||||
| 1028 | } | ||||||||
| 1029 | |||||||||
| 1030 | /* | ||||||||
| 1031 | * If appending a version number, read through the directory, looking | ||||||||
| 1032 | * for file names that match the name followed by a number. Make all | ||||||||
| 1033 | * of the other % characters in name literal, so the user doesn't get | ||||||||
| 1034 | * surprised and sscanf doesn't drop core indirecting through pointers | ||||||||
| 1035 | * that don't exist. If any such files are found, increment its number | ||||||||
| 1036 | * by one. | ||||||||
| 1037 | */ | ||||||||
| 1038 | if (version) { | ||||||||
| 1039 | GET_SPACE_GOTO(sp, bp, blen, cmd.argv[0]->len * 2 + 50){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp == ((void *)0) || (((L__gp)->flags) & ((0x0100 )))) { (bp) = ((void *)0); (blen) = 0; { void *L__bincp; if ( ((cmd.argv[0]->len * 2 + 50)) > ((blen))) { if ((L__bincp = binc(((sp)), ((bp)), &((blen)), ((cmd.argv[0]->len * 2 + 50)))) == ((void *)0)) goto alloc_err; ((bp)) = L__bincp ; } }; } else { { void *L__bincp; if (((cmd.argv[0]->len * 2 + 50)) > (L__gp->tmp_blen)) { if ((L__bincp = binc(( (sp)), (L__gp->tmp_bp), &(L__gp->tmp_blen), ((cmd.argv [0]->len * 2 + 50)))) == ((void *)0)) goto alloc_err; (L__gp ->tmp_bp) = L__bincp; } }; (bp) = L__gp->tmp_bp; (blen) = L__gp->tmp_blen; (((L__gp)->flags) |= ((0x0100))); } }; | ||||||||
| 1040 | for (t = bp, slash = NULL((void *)0), | ||||||||
| 1041 | p = cmd.argv[0]->bp; p[0] != '\0'; *t++ = *p++) | ||||||||
| 1042 | if (p[0] == '%') { | ||||||||
| 1043 | if (p[1] != '%') | ||||||||
| 1044 | *t++ = '%'; | ||||||||
| 1045 | } else if (p[0] == '/') | ||||||||
| 1046 | slash = t; | ||||||||
| 1047 | pct = t; | ||||||||
| 1048 | *t++ = '%'; | ||||||||
| 1049 | *t++ = 'd'; | ||||||||
| 1050 | *t = '\0'; | ||||||||
| 1051 | |||||||||
| 1052 | if (slash == NULL((void *)0)) { | ||||||||
| 1053 | dirp = opendir("."); | ||||||||
| 1054 | p = bp; | ||||||||
| 1055 | } else { | ||||||||
| 1056 | *slash = '\0'; | ||||||||
| 1057 | dirp = opendir(bp); | ||||||||
| 1058 | *slash = '/'; | ||||||||
| 1059 | p = slash + 1; | ||||||||
| 1060 | } | ||||||||
| 1061 | if (dirp == NULL((void *)0)) { | ||||||||
| 1062 | estr = cmd.argv[0]->bp; | ||||||||
| 1063 | goto err; | ||||||||
| 1064 | } | ||||||||
| 1065 | |||||||||
| 1066 | for (maxnum = 0; (dp = readdir(dirp)) != NULL((void *)0);) | ||||||||
| 1067 | if (sscanf(dp->d_name, p, &num) == 1 && num > maxnum) | ||||||||
| 1068 | maxnum = num; | ||||||||
| 1069 | (void)closedir(dirp); | ||||||||
| 1070 | |||||||||
| 1071 | /* Format the backup file name. */ | ||||||||
| 1072 | (void)snprintf(pct, blen - (pct - bp), "%d", maxnum + 1); | ||||||||
| 1073 | wfname = bp; | ||||||||
| 1074 | } else { | ||||||||
| 1075 | bp = NULL((void *)0); | ||||||||
| 1076 | wfname = cmd.argv[0]->bp; | ||||||||
| 1077 | } | ||||||||
| 1078 | |||||||||
| 1079 | /* Open the backup file, avoiding lurkers. */ | ||||||||
| 1080 | if (stat(wfname, &sb) == 0) { | ||||||||
| 1081 | if (!S_ISREG(sb.st_mode)((sb.st_mode & 0170000) == 0100000)) { | ||||||||
| 1082 | msgq_str(sp, M_ERR, bname, | ||||||||
| 1083 | "%s: not a regular file"); | ||||||||
| 1084 | goto err; | ||||||||
| 1085 | } | ||||||||
| 1086 | if (sb.st_uid != getuid()) { | ||||||||
| 1087 | msgq_str(sp, M_ERR, bname, "%s: not owned by you"); | ||||||||
| 1088 | goto err; | ||||||||
| 1089 | } | ||||||||
| 1090 | if (sb.st_mode & (S_IRGRP0000040 | S_IWGRP0000020 | S_IROTH0000004 | S_IWOTH0000002)) { | ||||||||
| 1091 | msgq_str(sp, M_ERR, bname, | ||||||||
| 1092 | "%s: accessible by a user other than the owner"); | ||||||||
| 1093 | goto err; | ||||||||
| 1094 | } | ||||||||
| 1095 | flags = O_TRUNC0x0400; | ||||||||
| 1096 | } else | ||||||||
| 1097 | flags = O_CREAT0x0200 | O_EXCL0x0800; | ||||||||
| 1098 | if ((wfd = open(wfname, flags | O_WRONLY0x0001, S_IRUSR0000400 | S_IWUSR0000200)) < 0 || | ||||||||
| 1099 | fchmod(wfd, S_IRUSR0000400 | S_IWUSR0000200) < 0) { | ||||||||
| 1100 | if (wfd != -1) { | ||||||||
| 1101 | close(wfd); | ||||||||
| 1102 | (void)unlink(wfname); | ||||||||
| 1103 | } | ||||||||
| 1104 | estr = bname; | ||||||||
| 1105 | goto err; | ||||||||
| 1106 | } | ||||||||
| 1107 | |||||||||
| 1108 | /* Copy the file's current contents to its backup value. */ | ||||||||
| 1109 | while ((nr = read(rfd, buf, sizeof(buf))) > 0) | ||||||||
| 1110 | for (off = 0; nr != 0; nr -= nw, off += nw) | ||||||||
| 1111 | if ((nw = write(wfd, buf + off, nr)) < 0) { | ||||||||
| 1112 | estr = wfname; | ||||||||
| 1113 | goto err; | ||||||||
| 1114 | } | ||||||||
| 1115 | if (nr < 0) { | ||||||||
| 1116 | estr = name; | ||||||||
| 1117 | goto err; | ||||||||
| 1118 | } | ||||||||
| 1119 | |||||||||
| 1120 | if (close(rfd)) { | ||||||||
| 1121 | estr = name; | ||||||||
| 1122 | goto err; | ||||||||
| 1123 | } | ||||||||
| 1124 | if (close(wfd)) { | ||||||||
| 1125 | estr = wfname; | ||||||||
| 1126 | goto err; | ||||||||
| 1127 | } | ||||||||
| 1128 | if (bp != NULL((void *)0)) | ||||||||
| 1129 | FREE_SPACE(sp, bp, blen){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (bp) == L__gp->tmp_bp ) (((L__gp)->flags) &= ~((0x0100))); else free(bp); }; | ||||||||
| 1130 | return (0); | ||||||||
| 1131 | |||||||||
| 1132 | alloc_err: | ||||||||
| 1133 | err: if (rfd != -1) | ||||||||
| 1134 | (void)close(rfd); | ||||||||
| 1135 | if (wfd != -1) { | ||||||||
| 1136 | (void)unlink(wfname); | ||||||||
| 1137 | (void)close(wfd); | ||||||||
| 1138 | } | ||||||||
| 1139 | if (estr) | ||||||||
| 1140 | msgq_str(sp, M_SYSERR, estr, "%s"); | ||||||||
| 1141 | if (bp != NULL((void *)0)) | ||||||||
| 1142 | FREE_SPACE(sp, bp, blen){ GS *L__gp = (sp) == ((void *)0) ? ((void *)0) : (sp)->gp ; if (L__gp != ((void *)0) && (bp) == L__gp->tmp_bp ) (((L__gp)->flags) &= ~((0x0100))); else free(bp); }; | ||||||||
| 1143 | return (1); | ||||||||
| 1144 | } | ||||||||
| 1145 | |||||||||
| 1146 | /* | ||||||||
| 1147 | * file_comment -- | ||||||||
| 1148 | * Skip the first comment. | ||||||||
| 1149 | */ | ||||||||
| 1150 | static void | ||||||||
| 1151 | file_comment(SCR *sp) | ||||||||
| 1152 | { | ||||||||
| 1153 | recno_t lno; | ||||||||
| 1154 | size_t len; | ||||||||
| 1155 | char *p; | ||||||||
| 1156 | |||||||||
| 1157 | for (lno = 1; !db_get(sp, lno, 0, &p, &len) && len == 0; ++lno); | ||||||||
| 1158 | if (p == NULL((void *)0)) | ||||||||
| 1159 | return; | ||||||||
| 1160 | if (p[0] == '#') { | ||||||||
| 1161 | F_SET(sp, SC_SCR_TOP)(((sp)->flags) |= ((0x00000100))); | ||||||||
| 1162 | while (!db_get(sp, ++lno, 0, &p, &len)) | ||||||||
| 1163 | if (len < 1 || p[0] != '#') { | ||||||||
| 1164 | sp->lno = lno; | ||||||||
| 1165 | return; | ||||||||
| 1166 | } | ||||||||
| 1167 | } else if (len > 1 && p[0] == '/' && p[1] == '*') { | ||||||||
| 1168 | F_SET(sp, SC_SCR_TOP)(((sp)->flags) |= ((0x00000100))); | ||||||||
| 1169 | do { | ||||||||
| 1170 | for (; len > 1; --len, ++p) | ||||||||
| 1171 | if (p[0] == '*' && p[1] == '/') { | ||||||||
| 1172 | sp->lno = lno; | ||||||||
| 1173 | return; | ||||||||
| 1174 | } | ||||||||
| 1175 | } while (!db_get(sp, ++lno, 0, &p, &len)); | ||||||||
| 1176 | } else if (len > 1 && p[0] == '/' && p[1] == '/') { | ||||||||
| 1177 | F_SET(sp, SC_SCR_TOP)(((sp)->flags) |= ((0x00000100))); | ||||||||
| 1178 | p += 2; | ||||||||
| 1179 | len -= 2; | ||||||||
| 1180 | do { | ||||||||
| 1181 | for (; len > 1; --len, ++p) | ||||||||
| 1182 | if (p[0] == '/' && p[1] == '/') { | ||||||||
| 1183 | sp->lno = lno; | ||||||||
| 1184 | return; | ||||||||
| 1185 | } | ||||||||
| 1186 | } while (!db_get(sp, ++lno, 0, &p, &len)); | ||||||||
| 1187 | } | ||||||||
| 1188 | } | ||||||||
| 1189 | |||||||||
| 1190 | /* | ||||||||
| 1191 | * file_m1 -- | ||||||||
| 1192 | * First modification check routine. The :next, :prev, :rewind, :tag, | ||||||||
| 1193 | * :tagpush, :tagpop, ^^ modifications check. | ||||||||
| 1194 | * | ||||||||
| 1195 | * PUBLIC: int file_m1(SCR *, int, int); | ||||||||
| 1196 | */ | ||||||||
| 1197 | int | ||||||||
| 1198 | file_m1(SCR *sp, int force, int flags) | ||||||||
| 1199 | { | ||||||||
| 1200 | EXF *ep; | ||||||||
| 1201 | |||||||||
| 1202 | ep = sp->ep; | ||||||||
| 1203 | |||||||||
| 1204 | /* If no file loaded, return no modifications. */ | ||||||||
| 1205 | if (ep == NULL((void *)0)) | ||||||||
| 1206 | return (0); | ||||||||
| 1207 | |||||||||
| 1208 | /* | ||||||||
| 1209 | * If the file has been modified, we'll want to write it back or | ||||||||
| 1210 | * fail. If autowrite is set, we'll write it back automatically, | ||||||||
| 1211 | * unless force is also set. Otherwise, we fail unless forced or | ||||||||
| 1212 | * there's another open screen on this file. | ||||||||
| 1213 | */ | ||||||||
| 1214 | if (F_ISSET(ep, F_MODIFIED)(((ep)->flags) & ((0x004)))) { | ||||||||
| 1215 | if (O_ISSET(sp, O_AUTOWRITE)((((&(((sp)))->opts[(((O_AUTOWRITE)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_AUTOWRITE )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_AUTOWRITE) ))].o_cur.val)) { | ||||||||
| 1216 | if (!force && file_aw(sp, flags)) | ||||||||
| 1217 | return (1); | ||||||||
| 1218 | } else if (ep->refcnt <= 1 && !force) { | ||||||||
| 1219 | msgq(sp, M_ERR, LF_ISSET(FS_POSSIBLE)((flags) & ((0x010))) ? | ||||||||
| 1220 | "File modified since last complete write; write or use ! to override" : | ||||||||
| 1221 | "File modified since last complete write; write or use :edit! to override"); | ||||||||
| 1222 | return (1); | ||||||||
| 1223 | } | ||||||||
| 1224 | } | ||||||||
| 1225 | |||||||||
| 1226 | return (file_m3(sp, force)); | ||||||||
| 1227 | } | ||||||||
| 1228 | |||||||||
| 1229 | /* | ||||||||
| 1230 | * file_m2 -- | ||||||||
| 1231 | * Second modification check routine. The :edit, :quit, :recover | ||||||||
| 1232 | * modifications check. | ||||||||
| 1233 | * | ||||||||
| 1234 | * PUBLIC: int file_m2(SCR *, int); | ||||||||
| 1235 | */ | ||||||||
| 1236 | int | ||||||||
| 1237 | file_m2(SCR *sp, int force) | ||||||||
| 1238 | { | ||||||||
| 1239 | EXF *ep; | ||||||||
| 1240 | |||||||||
| 1241 | ep = sp->ep; | ||||||||
| 1242 | |||||||||
| 1243 | /* If no file loaded, return no modifications. */ | ||||||||
| 1244 | if (ep == NULL((void *)0)) | ||||||||
| 1245 | return (0); | ||||||||
| 1246 | |||||||||
| 1247 | /* | ||||||||
| 1248 | * If the file has been modified, we'll want to fail, unless forced | ||||||||
| 1249 | * or there's another open screen on this file. | ||||||||
| 1250 | */ | ||||||||
| 1251 | if (F_ISSET(ep, F_MODIFIED)(((ep)->flags) & ((0x004))) && ep->refcnt <= 1 && !force) { | ||||||||
| 1252 | msgq(sp, M_ERR, | ||||||||
| 1253 | "File modified since last complete write; write or use ! to override"); | ||||||||
| 1254 | return (1); | ||||||||
| 1255 | } | ||||||||
| 1256 | |||||||||
| 1257 | return (file_m3(sp, force)); | ||||||||
| 1258 | } | ||||||||
| 1259 | |||||||||
| 1260 | /* | ||||||||
| 1261 | * file_m3 -- | ||||||||
| 1262 | * Third modification check routine. | ||||||||
| 1263 | * | ||||||||
| 1264 | * PUBLIC: int file_m3(SCR *, int); | ||||||||
| 1265 | */ | ||||||||
| 1266 | int | ||||||||
| 1267 | file_m3(SCR *sp, int force) | ||||||||
| 1268 | { | ||||||||
| 1269 | EXF *ep; | ||||||||
| 1270 | |||||||||
| 1271 | ep = sp->ep; | ||||||||
| 1272 | |||||||||
| 1273 | /* If no file loaded, return no modifications. */ | ||||||||
| 1274 | if (ep == NULL((void *)0)) | ||||||||
| 1275 | return (0); | ||||||||
| 1276 | |||||||||
| 1277 | /* | ||||||||
| 1278 | * Don't exit while in a temporary files if the file was ever modified. | ||||||||
| 1279 | * The problem is that if the user does a ":wq", we write and quit, | ||||||||
| 1280 | * unlinking the temporary file. Not what the user had in mind at all. | ||||||||
| 1281 | * We permit writing to temporary files, so that user maps using file | ||||||||
| 1282 | * system names work with temporary files. | ||||||||
| 1283 | */ | ||||||||
| 1284 | if (F_ISSET(sp->frp, FR_TMPEXIT)(((sp->frp)->flags) & ((0x0040))) && ep->refcnt <= 1 && !force) { | ||||||||
| 1285 | msgq(sp, M_ERR, | ||||||||
| 1286 | "File is a temporary; exit will discard modifications"); | ||||||||
| 1287 | return (1); | ||||||||
| 1288 | } | ||||||||
| 1289 | return (0); | ||||||||
| 1290 | } | ||||||||
| 1291 | |||||||||
| 1292 | /* | ||||||||
| 1293 | * file_aw -- | ||||||||
| 1294 | * Autowrite routine. If modified, autowrite is set and the readonly bit | ||||||||
| 1295 | * is not set, write the file. A routine so there's a place to put the | ||||||||
| 1296 | * comment. | ||||||||
| 1297 | * | ||||||||
| 1298 | * PUBLIC: int file_aw(SCR *, int); | ||||||||
| 1299 | */ | ||||||||
| 1300 | int | ||||||||
| 1301 | file_aw(SCR *sp, int flags) | ||||||||
| 1302 | { | ||||||||
| 1303 | if (!F_ISSET(sp->ep, F_MODIFIED)(((sp->ep)->flags) & ((0x004)))) | ||||||||
| 1304 | return (0); | ||||||||
| 1305 | if (!O_ISSET(sp, O_AUTOWRITE)((((&(((sp)))->opts[(((O_AUTOWRITE)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_AUTOWRITE )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_AUTOWRITE) ))].o_cur.val)) | ||||||||
| 1306 | return (0); | ||||||||
| 1307 | |||||||||
| 1308 | /* | ||||||||
| 1309 | * !!! | ||||||||
| 1310 | * Historic 4BSD vi attempted to write the file if autowrite was set, | ||||||||
| 1311 | * regardless of the writeability of the file (as defined by the file | ||||||||
| 1312 | * readonly flag). System V changed this as some point, not attempting | ||||||||
| 1313 | * autowrite if the file was readonly. This feels like a bug fix to | ||||||||
| 1314 | * me (e.g. the principle of least surprise is violated if readonly is | ||||||||
| 1315 | * set and vi writes the file), so I'm compatible with System V. | ||||||||
| 1316 | */ | ||||||||
| 1317 | if (O_ISSET(sp, O_READONLY)((((&(((sp)))->opts[(((O_READONLY)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_READONLY )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_READONLY)) )].o_cur.val)) { | ||||||||
| 1318 | msgq(sp, M_INFO, | ||||||||
| 1319 | "File readonly, modifications not auto-written"); | ||||||||
| 1320 | return (1); | ||||||||
| 1321 | } | ||||||||
| 1322 | return (file_write(sp, NULL((void *)0), NULL((void *)0), NULL((void *)0), flags)); | ||||||||
| 1323 | } | ||||||||
| 1324 | |||||||||
| 1325 | /* | ||||||||
| 1326 | * set_alt_name -- | ||||||||
| 1327 | * Set the alternate pathname. | ||||||||
| 1328 | * | ||||||||
| 1329 | * Set the alternate pathname. It's a routine because I wanted some place | ||||||||
| 1330 | * to hang this comment. The alternate pathname (normally referenced using | ||||||||
| 1331 | * the special character '#' during file expansion and in the vi ^^ command) | ||||||||
| 1332 | * is set by almost all ex commands that take file names as arguments. The | ||||||||
| 1333 | * rules go something like this: | ||||||||
| 1334 | * | ||||||||
| 1335 | * 1: If any ex command takes a file name as an argument (except for the | ||||||||
| 1336 | * :next command), the alternate pathname is set to that file name. | ||||||||
| 1337 | * This excludes the command ":e" and ":w !command" as no file name | ||||||||
| 1338 | * was specified. Note, historically, the :source command did not set | ||||||||
| 1339 | * the alternate pathname. It does in nvi, for consistency. | ||||||||
| 1340 | * | ||||||||
| 1341 | * 2: However, if any ex command sets the current pathname, e.g. the | ||||||||
| 1342 | * ":e file" or ":rew" commands succeed, then the alternate pathname | ||||||||
| 1343 | * is set to the previous file's current pathname, if it had one. | ||||||||
| 1344 | * This includes the ":file" command and excludes the ":e" command. | ||||||||
| 1345 | * So, by rule #1 and rule #2, if ":edit foo" fails, the alternate | ||||||||
| 1346 | * pathname will be "foo", if it succeeds, the alternate pathname will | ||||||||
| 1347 | * be the previous current pathname. The ":e" command will not set | ||||||||
| 1348 | * the alternate or current pathnames regardless. | ||||||||
| 1349 | * | ||||||||
| 1350 | * 3: However, if it's a read or write command with a file argument and | ||||||||
| 1351 | * the current pathname has not yet been set, the file name becomes | ||||||||
| 1352 | * the current pathname, and the alternate pathname is unchanged. | ||||||||
| 1353 | * | ||||||||
| 1354 | * If the user edits a temporary file, there may be times when there is no | ||||||||
| 1355 | * alternative file name. A name argument of NULL turns it off. | ||||||||
| 1356 | * | ||||||||
| 1357 | * PUBLIC: void set_alt_name(SCR *, char *); | ||||||||
| 1358 | */ | ||||||||
| 1359 | void | ||||||||
| 1360 | set_alt_name(SCR *sp, char *name) | ||||||||
| 1361 | { | ||||||||
| 1362 | free(sp->alt_name); | ||||||||
| 1363 | if (name == NULL((void *)0)) | ||||||||
| 1364 | sp->alt_name = NULL((void *)0); | ||||||||
| 1365 | else if ((sp->alt_name = strdup(name)) == NULL((void *)0)) | ||||||||
| 1366 | msgq(sp, M_SYSERR, NULL((void *)0)); | ||||||||
| 1367 | } | ||||||||
| 1368 | |||||||||
| 1369 | /* | ||||||||
| 1370 | * file_lock -- | ||||||||
| 1371 | * Get an exclusive lock on a file. | ||||||||
| 1372 | * | ||||||||
| 1373 | * PUBLIC: lockr_t file_lock(SCR *, char *, int *, int, int); | ||||||||
| 1374 | */ | ||||||||
| 1375 | lockr_t | ||||||||
| 1376 | file_lock(SCR *sp, char *name, int *fdp, int fd, int iswrite) | ||||||||
| 1377 | { | ||||||||
| 1378 | if (!O_ISSET(sp, O_LOCKFILES)((((&(((sp)))->opts[(((O_LOCKFILES)))])->flags) & ((0x01))) ? (((sp)))->gp->opts[(((sp)))->opts[(((O_LOCKFILES )))].o_cur.val].o_cur.val : (((sp)))->opts[(((O_LOCKFILES) ))].o_cur.val)) | ||||||||
| 1379 | return (LOCK_SUCCESS); | ||||||||
| 1380 | |||||||||
| 1381 | /* Set close-on-exec flag so locks are not inherited by shell cmd. */ | ||||||||
| 1382 | if (fcntl(fd, F_SETFD2, FD_CLOEXEC1) == -1) | ||||||||
| 1383 | msgq_str(sp, M_SYSERR, name, "%s"); | ||||||||
| 1384 | |||||||||
| 1385 | /* | ||||||||
| 1386 | * !!! | ||||||||
| 1387 | * We need to distinguish a lock not being available for the file | ||||||||
| 1388 | * from the file system not supporting locking. Flock is documented | ||||||||
| 1389 | * as returning EWOULDBLOCK; add EAGAIN for good measure, and assume | ||||||||
| 1390 | * they are the former. There's no portable way to do this. | ||||||||
| 1391 | */ | ||||||||
| 1392 | errno(*__errno()) = 0; | ||||||||
| 1393 | return (flock(fd, LOCK_EX0x02 | LOCK_NB0x04) ? | ||||||||
| 1394 | errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EWOULDBLOCK35 ? LOCK_UNAVAIL : LOCK_FAILED : | ||||||||
| 1395 | LOCK_SUCCESS); | ||||||||
| 1396 | } |