Commit | Line | Data |
---|---|---|
237e0016 RS |
1 | /* movemail foo bar -- move file foo to file bar, |
2 | locking file foo the way /bin/mail respects. | |
7f75d5c6 | 3 | Copyright (C) 1986, 1992, 1993, 1994, 1996 Free Software Foundation, Inc. |
237e0016 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
93320c23 JA |
7 | GNU Emacs is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
39356651 | 9 | the Free Software Foundation; either version 2, or (at your option) |
93320c23 JA |
10 | any later version. |
11 | ||
237e0016 | 12 | GNU Emacs is distributed in the hope that it will be useful, |
93320c23 JA |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
237e0016 | 16 | |
93320c23 JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
237e0016 | 21 | |
63cf923d RS |
22 | /* Important notice: defining MAIL_USE_FLOCK or MAIL_USE_LOCKF *will |
23 | cause loss of mail* if you do it on a system that does not normally | |
24 | use flock as its way of interlocking access to inbox files. The | |
25 | setting of MAIL_USE_FLOCK and MAIL_USE_LOCKF *must agree* with the | |
26 | system's own conventions. It is not a choice that is up to you. | |
08d0752f RS |
27 | |
28 | So, if your system uses lock files rather than flock, then the only way | |
29 | you can get proper operation is to enable movemail to write lockfiles there. | |
30 | This means you must either give that directory access modes | |
31 | that permit everyone to write lockfiles in it, or you must make movemail | |
32 | a setuid or setgid program. */ | |
33 | ||
237e0016 RS |
34 | /* |
35 | * Modified January, 1986 by Michael R. Gretzinger (Project Athena) | |
36 | * | |
88c40feb | 37 | * Added POP (Post Office Protocol) service. When compiled -DMAIL_USE_POP |
237e0016 RS |
38 | * movemail will accept input filename arguments of the form |
39 | * "po:username". This will cause movemail to open a connection to | |
40 | * a pop server running on $MAILHOST (environment variable). Movemail | |
41 | * must be setuid to root in order to work with POP. | |
42 | * | |
43 | * New module: popmail.c | |
44 | * Modified routines: | |
cfa191ff | 45 | * main - added code within #ifdef MAIL_USE_POP; added setuid (getuid ()) |
237e0016 RS |
46 | * after POP code. |
47 | * New routines in movemail.c: | |
48 | * get_errmsg - return pointer to system error message | |
49 | * | |
2e82e3c3 RS |
50 | * Modified August, 1993 by Jonathan Kamens (OpenVision Technologies) |
51 | * | |
52 | * Move all of the POP code into a separate file, "pop.c". | |
53 | * Use strerror instead of get_errmsg. | |
54 | * | |
237e0016 RS |
55 | */ |
56 | ||
3b9ee819 RS |
57 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ |
58 | #include <../src/config.h> | |
237e0016 RS |
59 | #include <sys/types.h> |
60 | #include <sys/stat.h> | |
61 | #include <sys/file.h> | |
e2f9d9af | 62 | #include <stdio.h> |
237e0016 | 63 | #include <errno.h> |
8ca83cfd | 64 | #include <../src/syswait.h> |
fea4325c | 65 | #include <getopt.h> |
2e82e3c3 RS |
66 | #ifdef MAIL_USE_POP |
67 | #include "pop.h" | |
68 | #endif | |
237e0016 | 69 | |
91cf09ac RS |
70 | #ifdef MSDOS |
71 | #undef access | |
72 | #endif /* MSDOS */ | |
73 | ||
61946d67 RS |
74 | #ifndef DIRECTORY_SEP |
75 | #define DIRECTORY_SEP '/' | |
76 | #endif | |
77 | #ifndef IS_DIRECTORY_SEP | |
78 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
79 | #endif | |
80 | ||
7f75d5c6 RS |
81 | #ifdef WINDOWSNT |
82 | #undef access | |
83 | #undef unlink | |
84 | #define fork() 0 | |
85 | #define sys_wait(var) (*(var) = 0) | |
86 | /* Unfortunately, Samba doesn't seem to properly lock Unix files even | |
87 | though the locking call succeeds (and indeed blocks local access from | |
88 | other NT programs). If you have direct file access using an NFS | |
89 | client or something other than Samba, the locking call might work | |
90 | properly - make sure it does before you enable this! */ | |
91 | #define DISABLE_DIRECT_ACCESS | |
92 | #endif /* WINDOWSNT */ | |
93 | ||
237e0016 RS |
94 | #ifdef USG |
95 | #include <fcntl.h> | |
96 | #include <unistd.h> | |
4ec9a77a RS |
97 | #ifndef F_OK |
98 | #define F_OK 0 | |
99 | #define X_OK 1 | |
100 | #define W_OK 2 | |
101 | #define R_OK 4 | |
102 | #endif | |
237e0016 RS |
103 | #endif /* USG */ |
104 | ||
29beb080 RS |
105 | #ifdef HAVE_UNISTD_H |
106 | #include <unistd.h> | |
107 | #endif | |
108 | ||
7f75d5c6 | 109 | #if defined (XENIX) || defined (WINDOWSNT) |
237e0016 RS |
110 | #include <sys/locking.h> |
111 | #endif | |
112 | ||
63cf923d RS |
113 | #ifdef MAIL_USE_LOCKF |
114 | #define MAIL_USE_SYSTEM_LOCK | |
115 | #endif | |
116 | ||
117 | #ifdef MAIL_USE_FLOCK | |
118 | #define MAIL_USE_SYSTEM_LOCK | |
119 | #endif | |
120 | ||
4293ba7f RS |
121 | #ifdef MAIL_USE_MMDF |
122 | extern int lk_open (), lk_close (); | |
123 | #endif | |
124 | ||
a4deff3c RS |
125 | #if !defined (MAIL_USE_SYSTEM_LOCK) && !defined (MAIL_USE_MMDF) && \ |
126 | defined (HAVE_LIBMAIL) && defined (HAVE_MAILLOCK_H) | |
127 | #include <maillock.h> | |
128 | /* We can't use maillock unless we know what directory system mail | |
129 | files appear in. */ | |
130 | #ifdef MAILDIR | |
131 | #define MAIL_USE_MAILLOCK | |
132 | static char *mail_spool_name (); | |
133 | #endif | |
134 | #endif | |
135 | ||
237e0016 RS |
136 | /* Cancel substitutions made by config.h for Emacs. */ |
137 | #undef open | |
138 | #undef read | |
139 | #undef write | |
140 | #undef close | |
141 | ||
e97dd183 | 142 | #ifndef errno |
237e0016 | 143 | extern int errno; |
e97dd183 | 144 | #endif |
e2f9d9af | 145 | char *strerror (); |
e2f9d9af DM |
146 | |
147 | void fatal (); | |
148 | void error (); | |
149 | void pfatal_with_name (); | |
150 | void pfatal_and_delete (); | |
151 | char *concat (); | |
2583d6d7 | 152 | long *xmalloc (); |
e2f9d9af DM |
153 | int popmail (); |
154 | int pop_retr (); | |
155 | int mbx_write (); | |
156 | int mbx_delimit_begin (); | |
157 | int mbx_delimit_end (); | |
237e0016 RS |
158 | |
159 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
160 | char *delete_lockname; | |
161 | ||
e2f9d9af | 162 | int |
237e0016 RS |
163 | main (argc, argv) |
164 | int argc; | |
165 | char **argv; | |
166 | { | |
167 | char *inname, *outname; | |
168 | int indesc, outdesc; | |
237e0016 | 169 | int nread; |
8ca83cfd | 170 | WAITTYPE status; |
fea4325c | 171 | int c, preserve_mail = 0; |
237e0016 | 172 | |
63cf923d | 173 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
174 | struct stat st; |
175 | long now; | |
176 | int tem; | |
177 | char *lockname, *p; | |
906ad89d | 178 | char *tempname; |
237e0016 | 179 | int desc; |
63cf923d | 180 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 181 | |
a4deff3c RS |
182 | #ifdef MAIL_USE_MAILLOCK |
183 | char *spool_name; | |
184 | #endif | |
185 | ||
237e0016 RS |
186 | delete_lockname = 0; |
187 | ||
fea4325c | 188 | while ((c = getopt (argc, argv, "p")) != EOF) |
e2f9d9af | 189 | { |
fea4325c RS |
190 | switch (c) { |
191 | case 'p': | |
192 | preserve_mail++; | |
193 | break; | |
194 | default: | |
195 | exit(1); | |
196 | } | |
197 | } | |
198 | ||
199 | if ( | |
200 | #ifdef MAIL_USE_POP | |
201 | (argc - optind < 2) || (argc - optind > 3) | |
202 | #else | |
203 | (argc - optind != 2) | |
204 | #endif | |
205 | ) | |
206 | { | |
207 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", | |
208 | #ifdef MAIL_USE_POP | |
209 | " [POP-password]" | |
210 | #else | |
211 | "" | |
212 | #endif | |
213 | ); | |
a4deff3c | 214 | exit (1); |
e2f9d9af | 215 | } |
237e0016 | 216 | |
fea4325c RS |
217 | inname = argv[optind]; |
218 | outname = argv[optind+1]; | |
237e0016 | 219 | |
4293ba7f RS |
220 | #ifdef MAIL_USE_MMDF |
221 | mmdf_init (argv[0]); | |
222 | #endif | |
223 | ||
af7bd34e RS |
224 | if (*outname == 0) |
225 | fatal ("Destination file name is empty", 0); | |
226 | ||
b1ce62a8 | 227 | /* Check access to output file. */ |
237e0016 RS |
228 | if (access (outname, F_OK) == 0 && access (outname, W_OK) != 0) |
229 | pfatal_with_name (outname); | |
230 | ||
8e6208c5 | 231 | /* Also check that outname's directory is writable to the real uid. */ |
237e0016 | 232 | { |
91cf09ac | 233 | char *buf = (char *) xmalloc (strlen (outname) + 1); |
e2f9d9af | 234 | char *p; |
237e0016 RS |
235 | strcpy (buf, outname); |
236 | p = buf + strlen (buf); | |
7f75d5c6 | 237 | while (p > buf && !IS_DIRECTORY_SEP (p[-1])) |
237e0016 RS |
238 | *--p = 0; |
239 | if (p == buf) | |
240 | *p++ = '.'; | |
241 | if (access (buf, W_OK) != 0) | |
242 | pfatal_with_name (buf); | |
243 | free (buf); | |
244 | } | |
245 | ||
246 | #ifdef MAIL_USE_POP | |
12a0565a | 247 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 248 | { |
b3112191 | 249 | int status; |
237e0016 | 250 | |
fea4325c RS |
251 | status = popmail (inname + 3, outname, preserve_mail, |
252 | (argc - optind == 3) ? argv[optind+2] : NULL); | |
237e0016 RS |
253 | exit (status); |
254 | } | |
255 | ||
cfa191ff | 256 | setuid (getuid ()); |
237e0016 RS |
257 | #endif /* MAIL_USE_POP */ |
258 | ||
7f75d5c6 RS |
259 | #ifndef DISABLE_DIRECT_ACCESS |
260 | ||
b1ce62a8 RS |
261 | /* Check access to input file. */ |
262 | if (access (inname, R_OK | W_OK) != 0) | |
263 | pfatal_with_name (inname); | |
264 | ||
4293ba7f | 265 | #ifndef MAIL_USE_MMDF |
63cf923d | 266 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
267 | #ifdef MAIL_USE_MAILLOCK |
268 | spool_name = mail_spool_name (inname); | |
269 | if (! spool_name) | |
270 | #endif | |
237e0016 | 271 | { |
a4deff3c RS |
272 | /* Use a lock file named after our first argument with .lock appended: |
273 | If it exists, the mail file is locked. */ | |
274 | /* Note: this locking mechanism is *required* by the mailer | |
275 | (on systems which use it) to prevent loss of mail. | |
276 | ||
277 | On systems that use a lock file, extracting the mail without locking | |
278 | WILL occasionally cause loss of mail due to timing errors! | |
279 | ||
280 | So, if creation of the lock file fails | |
281 | due to access permission on the mail spool directory, | |
282 | you simply MUST change the permission | |
283 | and/or make movemail a setgid program | |
284 | so it can create lock files properly. | |
285 | ||
286 | You might also wish to verify that your system is one | |
287 | which uses lock files for this purpose. Some systems use other methods. | |
288 | ||
289 | If your system uses the `flock' system call for mail locking, | |
290 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
291 | and recompile movemail. If the s- file for your system | |
292 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
293 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
294 | ||
295 | lockname = concat (inname, ".lock", ""); | |
296 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
297 | strcpy (tempname, inname); | |
298 | p = tempname + strlen (tempname); | |
299 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
300 | p--; | |
301 | *p = 0; | |
302 | strcpy (p, "EXXXXXX"); | |
303 | mktemp (tempname); | |
cfa191ff | 304 | unlink (tempname); |
237e0016 | 305 | |
a4deff3c | 306 | while (1) |
237e0016 | 307 | { |
a4deff3c RS |
308 | /* Create the lock file, but not under the lock file name. */ |
309 | /* Give up if cannot do that. */ | |
310 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
311 | if (desc < 0) | |
312 | { | |
313 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
314 | sprintf (message, "%s--see source file lib-src/movemail.c", | |
315 | tempname); | |
316 | pfatal_with_name (message); | |
317 | } | |
318 | close (desc); | |
319 | ||
320 | tem = link (tempname, lockname); | |
321 | unlink (tempname); | |
322 | if (tem >= 0) | |
323 | break; | |
324 | sleep (1); | |
325 | ||
326 | /* If lock file is five minutes old, unlock it. | |
327 | Five minutes should be good enough to cope with crashes | |
328 | and wedgitude, and long enough to avoid being fooled | |
329 | by time differences between machines. */ | |
330 | if (stat (lockname, &st) >= 0) | |
331 | { | |
332 | now = time (0); | |
333 | if (st.st_ctime < now - 300) | |
334 | unlink (lockname); | |
335 | } | |
237e0016 | 336 | } |
237e0016 | 337 | |
a4deff3c RS |
338 | delete_lockname = lockname; |
339 | } | |
63cf923d RS |
340 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
341 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 342 | |
8ca83cfd RS |
343 | if (fork () == 0) |
344 | { | |
25025815 | 345 | int lockcount = 0; |
a4deff3c RS |
346 | int status = 0; |
347 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
348 | long touched_lock, now; | |
349 | #endif | |
25025815 | 350 | |
d5216c20 | 351 | setuid (getuid ()); |
8ca83cfd | 352 | |
63cf923d RS |
353 | #ifndef MAIL_USE_MMDF |
354 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 355 | indesc = open (inname, O_RDWR); |
63cf923d | 356 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 357 | indesc = open (inname, O_RDONLY); |
63cf923d | 358 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
359 | #else /* MAIL_USE_MMDF */ |
360 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
361 | #endif /* MAIL_USE_MMDF */ |
362 | ||
8ca83cfd RS |
363 | if (indesc < 0) |
364 | pfatal_with_name (inname); | |
237e0016 | 365 | |
e397a017 | 366 | #if defined (BSD_SYSTEM) || defined (XENIX) |
8ca83cfd RS |
367 | /* In case movemail is setuid to root, make sure the user can |
368 | read the output file. */ | |
369 | /* This is desirable for all systems | |
370 | but I don't want to assume all have the umask system call */ | |
371 | umask (umask (0) & 0333); | |
e397a017 | 372 | #endif /* BSD_SYSTEM || XENIX */ |
8ca83cfd RS |
373 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
374 | if (outdesc < 0) | |
375 | pfatal_with_name (outname); | |
25025815 RS |
376 | |
377 | /* This label exists so we can retry locking | |
378 | after a delay, if it got EAGAIN or EBUSY. */ | |
379 | retry_lock: | |
380 | ||
381 | /* Try to lock it. */ | |
a4deff3c RS |
382 | #ifdef MAIL_USE_MAILLOCK |
383 | if (spool_name) | |
384 | { | |
385 | /* The "0 - " is to make it a negative number if maillock returns | |
386 | non-zero. */ | |
387 | status = 0 - maillock (spool_name, 1); | |
388 | #ifdef HAVE_TOUCHLOCK | |
389 | touched_lock = time (0); | |
390 | #endif | |
391 | lockcount = 5; | |
392 | } | |
393 | else | |
394 | #endif /* MAIL_USE_MAILLOCK */ | |
395 | { | |
63cf923d RS |
396 | #ifdef MAIL_USE_SYSTEM_LOCK |
397 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 398 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 399 | #else /* not MAIL_USE_LOCKF */ |
237e0016 | 400 | #ifdef XENIX |
a4deff3c | 401 | status = locking (indesc, LK_RLCK, 0L); |
7f75d5c6 RS |
402 | #else |
403 | #ifdef WINDOWSNT | |
a4deff3c | 404 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 405 | #else |
a4deff3c | 406 | status = flock (indesc, LOCK_EX); |
237e0016 | 407 | #endif |
7f75d5c6 | 408 | #endif |
63cf923d RS |
409 | #endif /* not MAIL_USE_LOCKF */ |
410 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 411 | } |
237e0016 | 412 | |
25025815 RS |
413 | /* If it fails, retry up to 5 times |
414 | for certain failure codes. */ | |
415 | if (status < 0) | |
416 | { | |
417 | if (++lockcount <= 5) | |
418 | { | |
419 | #ifdef EAGAIN | |
420 | if (errno == EAGAIN) | |
421 | { | |
422 | sleep (1); | |
423 | goto retry_lock; | |
424 | } | |
425 | #endif | |
426 | #ifdef EBUSY | |
427 | if (errno == EBUSY) | |
428 | { | |
429 | sleep (1); | |
430 | goto retry_lock; | |
431 | } | |
432 | #endif | |
433 | } | |
434 | ||
435 | pfatal_with_name (inname); | |
436 | } | |
437 | ||
08564963 | 438 | { |
8ca83cfd RS |
439 | char buf[1024]; |
440 | ||
441 | while (1) | |
08564963 | 442 | { |
8ca83cfd RS |
443 | nread = read (indesc, buf, sizeof buf); |
444 | if (nread != write (outdesc, buf, nread)) | |
445 | { | |
446 | int saved_errno = errno; | |
447 | unlink (outname); | |
448 | errno = saved_errno; | |
449 | pfatal_with_name (outname); | |
450 | } | |
451 | if (nread < sizeof buf) | |
452 | break; | |
a4deff3c RS |
453 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
454 | if (spool_name) | |
455 | { | |
456 | now = time (0); | |
457 | if (now - touched_lock > 60) | |
458 | { | |
459 | touchlock (); | |
460 | touched_lock = now; | |
461 | } | |
462 | } | |
463 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 464 | } |
08564963 | 465 | } |
237e0016 | 466 | |
e397a017 | 467 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
468 | if (fsync (outdesc) < 0) |
469 | pfatal_and_delete (outname); | |
237e0016 RS |
470 | #endif |
471 | ||
8ca83cfd RS |
472 | /* Check to make sure no errors before we zap the inbox. */ |
473 | if (close (outdesc) != 0) | |
474 | pfatal_and_delete (outname); | |
237e0016 | 475 | |
63cf923d | 476 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
477 | if (! preserve_mail) |
478 | { | |
7f75d5c6 | 479 | #if defined (STRIDE) || defined (XENIX) || defined (WINDOWSNT) |
fea4325c RS |
480 | /* Stride, xenix have file locking, but no ftruncate. |
481 | This mess will do. */ | |
482 | close (open (inname, O_CREAT | O_TRUNC | O_RDWR, 0666)); | |
237e0016 | 483 | #else |
fea4325c RS |
484 | ftruncate (indesc, 0L); |
485 | } | |
237e0016 | 486 | #endif /* STRIDE or XENIX */ |
63cf923d | 487 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
488 | |
489 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 490 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 491 | #else |
8ca83cfd | 492 | close (indesc); |
4293ba7f | 493 | #endif |
237e0016 | 494 | |
63cf923d | 495 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
496 | if (! preserve_mail) |
497 | { | |
498 | /* Delete the input file; if we can't, at least get rid of its | |
499 | contents. */ | |
e97dd183 | 500 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
501 | /* This is generally bad to do, because it destroys the permissions |
502 | that were set on the file. Better to just empty the file. */ | |
503 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 504 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
505 | creat (inname, 0600); |
506 | } | |
63cf923d | 507 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 508 | |
a4deff3c RS |
509 | #ifdef MAIL_USE_MAILLOCK |
510 | /* This has to occur in the child, i.e., in the process that | |
511 | acquired the lock! */ | |
512 | if (spool_name) | |
513 | mailunlock (); | |
514 | #endif | |
8ca83cfd RS |
515 | exit (0); |
516 | } | |
517 | ||
518 | wait (&status); | |
519 | if (!WIFEXITED (status)) | |
520 | exit (1); | |
521 | else if (WRETCODE (status) != 0) | |
522 | exit (WRETCODE (status)); | |
523 | ||
63cf923d | 524 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
525 | #ifdef MAIL_USE_MAILLOCK |
526 | if (! spool_name) | |
527 | #endif /* MAIL_USE_MAILLOCK */ | |
528 | unlink (lockname); | |
63cf923d | 529 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
530 | |
531 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
532 | ||
e2f9d9af | 533 | return 0; |
237e0016 | 534 | } |
a4deff3c RS |
535 | |
536 | #ifdef MAIL_USE_MAILLOCK | |
537 | /* This function uses stat to confirm that the mail directory is | |
538 | identical to the directory of the input file, rather than just | |
539 | string-comparing the two paths, because one or both of them might | |
540 | be symbolic links pointing to some other directory. */ | |
541 | static char * | |
542 | mail_spool_name (inname) | |
543 | char *inname; | |
544 | { | |
545 | struct stat stat1, stat2; | |
546 | char *indir, *fname; | |
547 | int status; | |
548 | ||
549 | if (! (fname = rindex (inname, '/'))) | |
550 | return NULL; | |
551 | ||
552 | fname++; | |
553 | ||
554 | if (stat (MAILDIR, &stat1) < 0) | |
555 | return NULL; | |
556 | ||
557 | indir = (char *) xmalloc (fname - inname + 1); | |
558 | strncpy (indir, inname, fname - inname); | |
559 | indir[fname-inname] = '\0'; | |
560 | ||
561 | ||
562 | status = stat (indir, &stat2); | |
563 | ||
564 | free (indir); | |
565 | ||
566 | if (status < 0) | |
567 | return NULL; | |
568 | ||
569 | if ((stat1.st_dev == stat2.st_dev) && | |
570 | (stat1.st_ino == stat2.st_ino)) | |
571 | return fname; | |
572 | ||
573 | return NULL; | |
574 | } | |
575 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
576 | \f |
577 | /* Print error message and exit. */ | |
578 | ||
e2f9d9af | 579 | void |
237e0016 RS |
580 | fatal (s1, s2) |
581 | char *s1, *s2; | |
582 | { | |
583 | if (delete_lockname) | |
584 | unlink (delete_lockname); | |
585 | error (s1, s2); | |
586 | exit (1); | |
587 | } | |
588 | ||
589 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ | |
590 | ||
e2f9d9af | 591 | void |
b1ce62a8 RS |
592 | error (s1, s2, s3) |
593 | char *s1, *s2, *s3; | |
237e0016 | 594 | { |
e2f9d9af DM |
595 | fprintf (stderr, "movemail: "); |
596 | fprintf (stderr, s1, s2, s3); | |
597 | fprintf (stderr, "\n"); | |
237e0016 RS |
598 | } |
599 | ||
e2f9d9af | 600 | void |
237e0016 RS |
601 | pfatal_with_name (name) |
602 | char *name; | |
603 | { | |
e2f9d9af | 604 | char *s = concat ("", strerror (errno), " for %s"); |
237e0016 RS |
605 | fatal (s, name); |
606 | } | |
607 | ||
e2f9d9af | 608 | void |
cfa191ff RS |
609 | pfatal_and_delete (name) |
610 | char *name; | |
611 | { | |
e2f9d9af | 612 | char *s = concat ("", strerror (errno), " for %s"); |
cfa191ff RS |
613 | unlink (name); |
614 | fatal (s, name); | |
615 | } | |
616 | ||
237e0016 RS |
617 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
618 | ||
619 | char * | |
620 | concat (s1, s2, s3) | |
621 | char *s1, *s2, *s3; | |
622 | { | |
623 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
624 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
625 | ||
626 | strcpy (result, s1); | |
627 | strcpy (result + len1, s2); | |
628 | strcpy (result + len1 + len2, s3); | |
629 | *(result + len1 + len2 + len3) = 0; | |
630 | ||
631 | return result; | |
632 | } | |
633 | ||
634 | /* Like malloc but get fatal error if memory is exhausted. */ | |
635 | ||
2583d6d7 | 636 | long * |
237e0016 | 637 | xmalloc (size) |
e97dd183 | 638 | unsigned size; |
237e0016 | 639 | { |
2583d6d7 | 640 | long *result = (long *) malloc (size); |
237e0016 RS |
641 | if (!result) |
642 | fatal ("virtual memory exhausted", 0); | |
643 | return result; | |
644 | } | |
645 | \f | |
646 | /* This is the guts of the interface to the Post Office Protocol. */ | |
647 | ||
648 | #ifdef MAIL_USE_POP | |
649 | ||
7f75d5c6 | 650 | #ifndef WINDOWSNT |
237e0016 RS |
651 | #include <sys/socket.h> |
652 | #include <netinet/in.h> | |
653 | #include <netdb.h> | |
7f75d5c6 RS |
654 | #else |
655 | #undef _WINSOCKAPI_ | |
656 | #include <winsock.h> | |
657 | #endif | |
cecf0f21 | 658 | #include <pwd.h> |
237e0016 | 659 | |
237e0016 RS |
660 | #define NOTOK (-1) |
661 | #define OK 0 | |
662 | #define DONE 1 | |
663 | ||
664 | char *progname; | |
665 | FILE *sfi; | |
666 | FILE *sfo; | |
2e82e3c3 RS |
667 | char ibuffer[BUFSIZ]; |
668 | char obuffer[BUFSIZ]; | |
237e0016 RS |
669 | char Errmsg[80]; |
670 | ||
fea4325c | 671 | popmail (user, outfile, preserve, password) |
b1ce62a8 RS |
672 | char *user; |
673 | char *outfile; | |
fea4325c | 674 | int preserve; |
7f75d5c6 | 675 | char *password; |
237e0016 | 676 | { |
b1ce62a8 | 677 | int nmsgs, nbytes; |
b1ce62a8 RS |
678 | register int i; |
679 | int mbfi; | |
680 | FILE *mbf; | |
2e82e3c3 | 681 | char *getenv (); |
b32701a7 | 682 | popserver server; |
237e0016 | 683 | |
7f75d5c6 | 684 | server = pop_open (0, user, password, POP_NO_GETPASS); |
2e82e3c3 | 685 | if (! server) |
b1ce62a8 | 686 | { |
2e82e3c3 RS |
687 | error (pop_error); |
688 | return (1); | |
237e0016 RS |
689 | } |
690 | ||
2e82e3c3 | 691 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 692 | { |
2e82e3c3 RS |
693 | error (pop_error); |
694 | return (1); | |
237e0016 RS |
695 | } |
696 | ||
b1ce62a8 RS |
697 | if (!nmsgs) |
698 | { | |
2e82e3c3 RS |
699 | pop_close (server); |
700 | return (0); | |
b1ce62a8 RS |
701 | } |
702 | ||
703 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
704 | if (mbfi < 0) | |
705 | { | |
2e82e3c3 RS |
706 | pop_close (server); |
707 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
708 | return (1); | |
b1ce62a8 RS |
709 | } |
710 | fchown (mbfi, getuid (), -1); | |
711 | ||
7f75d5c6 | 712 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 713 | { |
2e82e3c3 RS |
714 | pop_close (server); |
715 | error ("Error in fdopen: %s", strerror (errno)); | |
716 | close (mbfi); | |
717 | unlink (outfile); | |
718 | return (1); | |
b1ce62a8 RS |
719 | } |
720 | ||
721 | for (i = 1; i <= nmsgs; i++) | |
722 | { | |
723 | mbx_delimit_begin (mbf); | |
ff804ff5 | 724 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 725 | { |
2e82e3c3 | 726 | error (Errmsg); |
b1ce62a8 | 727 | close (mbfi); |
2e82e3c3 | 728 | return (1); |
237e0016 | 729 | } |
b1ce62a8 RS |
730 | mbx_delimit_end (mbf); |
731 | fflush (mbf); | |
2e82e3c3 RS |
732 | if (ferror (mbf)) |
733 | { | |
734 | error ("Error in fflush: %s", strerror (errno)); | |
735 | pop_close (server); | |
736 | close (mbfi); | |
737 | return (1); | |
738 | } | |
237e0016 RS |
739 | } |
740 | ||
2e82e3c3 RS |
741 | /* On AFS, a call to write only modifies the file in the local |
742 | * workstation's AFS cache. The changes are not written to the server | |
743 | * until a call to fsync or close is made. Users with AFS home | |
744 | * directories have lost mail when over quota because these checks were | |
745 | * not made in previous versions of movemail. */ | |
746 | ||
e397a017 | 747 | #ifdef BSD_SYSTEM |
cfa191ff RS |
748 | if (fsync (mbfi) < 0) |
749 | { | |
2e82e3c3 RS |
750 | error ("Error in fsync: %s", strerror (errno)); |
751 | return (1); | |
cfa191ff | 752 | } |
340ff9de | 753 | #endif |
cfa191ff RS |
754 | |
755 | if (close (mbfi) == -1) | |
756 | { | |
2e82e3c3 RS |
757 | error ("Error in close: %s", strerror (errno)); |
758 | return (1); | |
cfa191ff RS |
759 | } |
760 | ||
fea4325c RS |
761 | if (! preserve) |
762 | for (i = 1; i <= nmsgs; i++) | |
763 | { | |
764 | if (pop_delete (server, i)) | |
765 | { | |
766 | error (pop_error); | |
767 | pop_close (server); | |
768 | return (1); | |
769 | } | |
770 | } | |
237e0016 | 771 | |
2e82e3c3 | 772 | if (pop_quit (server)) |
b1ce62a8 | 773 | { |
2e82e3c3 RS |
774 | error (pop_error); |
775 | return (1); | |
237e0016 | 776 | } |
237e0016 | 777 | |
2e82e3c3 | 778 | return (0); |
237e0016 RS |
779 | } |
780 | ||
ff804ff5 KH |
781 | int |
782 | pop_retr (server, msgno, arg) | |
b32701a7 | 783 | popserver server; |
ff804ff5 | 784 | FILE *arg; |
237e0016 | 785 | { |
2e82e3c3 RS |
786 | extern char *strerror (); |
787 | char *line; | |
788 | int ret; | |
237e0016 | 789 | |
2e82e3c3 | 790 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 791 | { |
2e82e3c3 RS |
792 | strncpy (Errmsg, pop_error, sizeof (Errmsg)); |
793 | Errmsg[sizeof (Errmsg)-1] = '\0'; | |
794 | return (NOTOK); | |
237e0016 RS |
795 | } |
796 | ||
2e82e3c3 | 797 | while (! (ret = pop_retrieve_next (server, &line))) |
b1ce62a8 | 798 | { |
2e82e3c3 RS |
799 | if (! line) |
800 | break; | |
801 | ||
ff804ff5 | 802 | if (mbx_write (line, arg) != OK) |
b1ce62a8 | 803 | { |
2e82e3c3 RS |
804 | strcpy (Errmsg, strerror (errno)); |
805 | pop_close (server); | |
806 | return (NOTOK); | |
237e0016 RS |
807 | } |
808 | } | |
237e0016 | 809 | |
2e82e3c3 | 810 | if (ret) |
b1ce62a8 | 811 | { |
2e82e3c3 RS |
812 | strncpy (Errmsg, pop_error, sizeof (Errmsg)); |
813 | Errmsg[sizeof (Errmsg)-1] = '\0'; | |
814 | return (NOTOK); | |
237e0016 RS |
815 | } |
816 | ||
2e82e3c3 | 817 | return (OK); |
237e0016 RS |
818 | } |
819 | ||
2e82e3c3 RS |
820 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
821 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
822 | && (a[1] == 'r') \ | |
823 | && (a[2] == 'o') \ | |
824 | && (a[3] == 'm') \ | |
825 | && (a[4] == ' ')) | |
237e0016 | 826 | |
2e82e3c3 | 827 | int |
b1ce62a8 RS |
828 | mbx_write (line, mbf) |
829 | char *line; | |
830 | FILE *mbf; | |
237e0016 | 831 | { |
2e82e3c3 RS |
832 | if (IS_FROM_LINE (line)) |
833 | { | |
834 | if (fputc ('>', mbf) == EOF) | |
835 | return (NOTOK); | |
836 | } | |
837 | if (fputs (line, mbf) == EOF) | |
838 | return (NOTOK); | |
839 | if (fputc (0x0a, mbf) == EOF) | |
840 | return (NOTOK); | |
841 | return (OK); | |
237e0016 RS |
842 | } |
843 | ||
2e82e3c3 | 844 | int |
b1ce62a8 RS |
845 | mbx_delimit_begin (mbf) |
846 | FILE *mbf; | |
237e0016 | 847 | { |
2e82e3c3 RS |
848 | if (fputs ("\f\n0, unseen,,\n", mbf) == EOF) |
849 | return (NOTOK); | |
850 | return (OK); | |
237e0016 RS |
851 | } |
852 | ||
b1ce62a8 RS |
853 | mbx_delimit_end (mbf) |
854 | FILE *mbf; | |
237e0016 | 855 | { |
2e82e3c3 RS |
856 | if (putc ('\037', mbf) == EOF) |
857 | return (NOTOK); | |
858 | return (OK); | |
237e0016 RS |
859 | } |
860 | ||
861 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
862 | \f |
863 | #ifndef HAVE_STRERROR | |
864 | char * | |
865 | strerror (errnum) | |
866 | int errnum; | |
867 | { | |
868 | extern char *sys_errlist[]; | |
869 | extern int sys_nerr; | |
870 | ||
871 | if (errnum >= 0 && errnum < sys_nerr) | |
872 | return sys_errlist[errnum]; | |
873 | return (char *) "Unknown error"; | |
874 | } | |
875 | ||
876 | #endif /* ! HAVE_STRERROR */ |