File: | src/usr.bin/vi/build/../common/exf.c |
Warning: | line 430, column 11 Use of memory after it is freed |
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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 == NULL((void *)0)) { | ||||
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 == NULL((void *)0) ? oname : rcv_name, "%s"); | ||||
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
| ||||
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 != NULL((void *)0)) | ||||
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 | } |