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