File: | src/usr.bin/vi/build/../common/exf.c |
Warning: | line 980, column 2 Value stored to 'rfd' is never read |
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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 && oname != NULL((void *)0) && frp->tname != NULL((void *)0)) { |
182 | free(ep); |
183 | return (1); |
184 | } |
185 | |
186 | if (LF_ISSET(FS_OPENERR)((flags) & ((0x008))) || oname == NULL((void *)0) || !exists) { |
187 | /* |
188 | * Don't try to create a temporary support file twice. |
189 | */ |
190 | if (frp->tname != NULL((void *)0)) |
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 == NULL((void *)0)) |
206 | F_SET(frp, FR_TMPFILE)(((frp)->flags) |= ((0x0080))); |
207 | if ((frp->tname = strdup(tname)) == NULL((void *)0) || |
208 | (frp->name == NULL((void *)0) && (frp->name = strdup(tname)) == NULL((void *)0))) { |
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 == NULL((void *)0) ? oname : NULL((void *)0), |
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 != 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 != 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 == NULL((void *)0)) |
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; |
Value stored to 'rfd' is never read | |
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 | } |