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 (); |
c4009c1f | 146 | extern char *rindex (); |
e2f9d9af DM |
147 | |
148 | void fatal (); | |
149 | void error (); | |
150 | void pfatal_with_name (); | |
151 | void pfatal_and_delete (); | |
152 | char *concat (); | |
2583d6d7 | 153 | long *xmalloc (); |
e2f9d9af DM |
154 | int popmail (); |
155 | int pop_retr (); | |
156 | int mbx_write (); | |
157 | int mbx_delimit_begin (); | |
158 | int mbx_delimit_end (); | |
237e0016 RS |
159 | |
160 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
161 | char *delete_lockname; | |
162 | ||
e2f9d9af | 163 | int |
237e0016 RS |
164 | main (argc, argv) |
165 | int argc; | |
166 | char **argv; | |
167 | { | |
168 | char *inname, *outname; | |
169 | int indesc, outdesc; | |
237e0016 | 170 | int nread; |
8ca83cfd | 171 | WAITTYPE status; |
fea4325c | 172 | int c, preserve_mail = 0; |
237e0016 | 173 | |
63cf923d | 174 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
175 | struct stat st; |
176 | long now; | |
177 | int tem; | |
178 | char *lockname, *p; | |
906ad89d | 179 | char *tempname; |
237e0016 | 180 | int desc; |
63cf923d | 181 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 182 | |
a4deff3c RS |
183 | #ifdef MAIL_USE_MAILLOCK |
184 | char *spool_name; | |
185 | #endif | |
186 | ||
237e0016 RS |
187 | delete_lockname = 0; |
188 | ||
fea4325c | 189 | while ((c = getopt (argc, argv, "p")) != EOF) |
e2f9d9af | 190 | { |
fea4325c RS |
191 | switch (c) { |
192 | case 'p': | |
193 | preserve_mail++; | |
194 | break; | |
195 | default: | |
196 | exit(1); | |
197 | } | |
198 | } | |
199 | ||
200 | if ( | |
201 | #ifdef MAIL_USE_POP | |
202 | (argc - optind < 2) || (argc - optind > 3) | |
203 | #else | |
204 | (argc - optind != 2) | |
205 | #endif | |
206 | ) | |
207 | { | |
208 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", | |
209 | #ifdef MAIL_USE_POP | |
210 | " [POP-password]" | |
211 | #else | |
212 | "" | |
213 | #endif | |
214 | ); | |
a4deff3c | 215 | exit (1); |
e2f9d9af | 216 | } |
237e0016 | 217 | |
fea4325c RS |
218 | inname = argv[optind]; |
219 | outname = argv[optind+1]; | |
237e0016 | 220 | |
4293ba7f RS |
221 | #ifdef MAIL_USE_MMDF |
222 | mmdf_init (argv[0]); | |
223 | #endif | |
224 | ||
af7bd34e RS |
225 | if (*outname == 0) |
226 | fatal ("Destination file name is empty", 0); | |
227 | ||
b1ce62a8 | 228 | /* Check access to output file. */ |
237e0016 RS |
229 | if (access (outname, F_OK) == 0 && access (outname, W_OK) != 0) |
230 | pfatal_with_name (outname); | |
231 | ||
8e6208c5 | 232 | /* Also check that outname's directory is writable to the real uid. */ |
237e0016 | 233 | { |
91cf09ac | 234 | char *buf = (char *) xmalloc (strlen (outname) + 1); |
e2f9d9af | 235 | char *p; |
237e0016 RS |
236 | strcpy (buf, outname); |
237 | p = buf + strlen (buf); | |
7f75d5c6 | 238 | while (p > buf && !IS_DIRECTORY_SEP (p[-1])) |
237e0016 RS |
239 | *--p = 0; |
240 | if (p == buf) | |
241 | *p++ = '.'; | |
242 | if (access (buf, W_OK) != 0) | |
243 | pfatal_with_name (buf); | |
244 | free (buf); | |
245 | } | |
246 | ||
247 | #ifdef MAIL_USE_POP | |
12a0565a | 248 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 249 | { |
b3112191 | 250 | int status; |
237e0016 | 251 | |
fea4325c RS |
252 | status = popmail (inname + 3, outname, preserve_mail, |
253 | (argc - optind == 3) ? argv[optind+2] : NULL); | |
237e0016 RS |
254 | exit (status); |
255 | } | |
256 | ||
cfa191ff | 257 | setuid (getuid ()); |
237e0016 RS |
258 | #endif /* MAIL_USE_POP */ |
259 | ||
7f75d5c6 RS |
260 | #ifndef DISABLE_DIRECT_ACCESS |
261 | ||
b1ce62a8 RS |
262 | /* Check access to input file. */ |
263 | if (access (inname, R_OK | W_OK) != 0) | |
264 | pfatal_with_name (inname); | |
265 | ||
4293ba7f | 266 | #ifndef MAIL_USE_MMDF |
63cf923d | 267 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
268 | #ifdef MAIL_USE_MAILLOCK |
269 | spool_name = mail_spool_name (inname); | |
270 | if (! spool_name) | |
271 | #endif | |
237e0016 | 272 | { |
a4deff3c RS |
273 | /* Use a lock file named after our first argument with .lock appended: |
274 | If it exists, the mail file is locked. */ | |
275 | /* Note: this locking mechanism is *required* by the mailer | |
276 | (on systems which use it) to prevent loss of mail. | |
277 | ||
278 | On systems that use a lock file, extracting the mail without locking | |
279 | WILL occasionally cause loss of mail due to timing errors! | |
280 | ||
281 | So, if creation of the lock file fails | |
282 | due to access permission on the mail spool directory, | |
283 | you simply MUST change the permission | |
284 | and/or make movemail a setgid program | |
285 | so it can create lock files properly. | |
286 | ||
287 | You might also wish to verify that your system is one | |
288 | which uses lock files for this purpose. Some systems use other methods. | |
289 | ||
290 | If your system uses the `flock' system call for mail locking, | |
291 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
292 | and recompile movemail. If the s- file for your system | |
293 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
294 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
295 | ||
296 | lockname = concat (inname, ".lock", ""); | |
297 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
298 | strcpy (tempname, inname); | |
299 | p = tempname + strlen (tempname); | |
300 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
301 | p--; | |
302 | *p = 0; | |
303 | strcpy (p, "EXXXXXX"); | |
304 | mktemp (tempname); | |
cfa191ff | 305 | unlink (tempname); |
237e0016 | 306 | |
a4deff3c | 307 | while (1) |
237e0016 | 308 | { |
a4deff3c RS |
309 | /* Create the lock file, but not under the lock file name. */ |
310 | /* Give up if cannot do that. */ | |
311 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
312 | if (desc < 0) | |
313 | { | |
314 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
315 | sprintf (message, "%s--see source file lib-src/movemail.c", | |
316 | tempname); | |
317 | pfatal_with_name (message); | |
318 | } | |
319 | close (desc); | |
320 | ||
321 | tem = link (tempname, lockname); | |
322 | unlink (tempname); | |
323 | if (tem >= 0) | |
324 | break; | |
325 | sleep (1); | |
326 | ||
327 | /* If lock file is five minutes old, unlock it. | |
328 | Five minutes should be good enough to cope with crashes | |
329 | and wedgitude, and long enough to avoid being fooled | |
330 | by time differences between machines. */ | |
331 | if (stat (lockname, &st) >= 0) | |
332 | { | |
333 | now = time (0); | |
334 | if (st.st_ctime < now - 300) | |
335 | unlink (lockname); | |
336 | } | |
237e0016 | 337 | } |
237e0016 | 338 | |
a4deff3c RS |
339 | delete_lockname = lockname; |
340 | } | |
63cf923d RS |
341 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
342 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 343 | |
8ca83cfd RS |
344 | if (fork () == 0) |
345 | { | |
25025815 | 346 | int lockcount = 0; |
a4deff3c RS |
347 | int status = 0; |
348 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
349 | long touched_lock, now; | |
350 | #endif | |
25025815 | 351 | |
d5216c20 | 352 | setuid (getuid ()); |
8ca83cfd | 353 | |
63cf923d RS |
354 | #ifndef MAIL_USE_MMDF |
355 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 356 | indesc = open (inname, O_RDWR); |
63cf923d | 357 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 358 | indesc = open (inname, O_RDONLY); |
63cf923d | 359 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
360 | #else /* MAIL_USE_MMDF */ |
361 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
362 | #endif /* MAIL_USE_MMDF */ |
363 | ||
8ca83cfd RS |
364 | if (indesc < 0) |
365 | pfatal_with_name (inname); | |
237e0016 | 366 | |
e397a017 | 367 | #if defined (BSD_SYSTEM) || defined (XENIX) |
8ca83cfd RS |
368 | /* In case movemail is setuid to root, make sure the user can |
369 | read the output file. */ | |
370 | /* This is desirable for all systems | |
371 | but I don't want to assume all have the umask system call */ | |
372 | umask (umask (0) & 0333); | |
e397a017 | 373 | #endif /* BSD_SYSTEM || XENIX */ |
8ca83cfd RS |
374 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
375 | if (outdesc < 0) | |
376 | pfatal_with_name (outname); | |
25025815 RS |
377 | |
378 | /* This label exists so we can retry locking | |
379 | after a delay, if it got EAGAIN or EBUSY. */ | |
380 | retry_lock: | |
381 | ||
382 | /* Try to lock it. */ | |
a4deff3c RS |
383 | #ifdef MAIL_USE_MAILLOCK |
384 | if (spool_name) | |
385 | { | |
386 | /* The "0 - " is to make it a negative number if maillock returns | |
387 | non-zero. */ | |
388 | status = 0 - maillock (spool_name, 1); | |
389 | #ifdef HAVE_TOUCHLOCK | |
390 | touched_lock = time (0); | |
391 | #endif | |
392 | lockcount = 5; | |
393 | } | |
394 | else | |
395 | #endif /* MAIL_USE_MAILLOCK */ | |
396 | { | |
63cf923d RS |
397 | #ifdef MAIL_USE_SYSTEM_LOCK |
398 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 399 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 400 | #else /* not MAIL_USE_LOCKF */ |
237e0016 | 401 | #ifdef XENIX |
a4deff3c | 402 | status = locking (indesc, LK_RLCK, 0L); |
7f75d5c6 RS |
403 | #else |
404 | #ifdef WINDOWSNT | |
a4deff3c | 405 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 406 | #else |
a4deff3c | 407 | status = flock (indesc, LOCK_EX); |
237e0016 | 408 | #endif |
7f75d5c6 | 409 | #endif |
63cf923d RS |
410 | #endif /* not MAIL_USE_LOCKF */ |
411 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 412 | } |
237e0016 | 413 | |
25025815 RS |
414 | /* If it fails, retry up to 5 times |
415 | for certain failure codes. */ | |
416 | if (status < 0) | |
417 | { | |
418 | if (++lockcount <= 5) | |
419 | { | |
420 | #ifdef EAGAIN | |
421 | if (errno == EAGAIN) | |
422 | { | |
423 | sleep (1); | |
424 | goto retry_lock; | |
425 | } | |
426 | #endif | |
427 | #ifdef EBUSY | |
428 | if (errno == EBUSY) | |
429 | { | |
430 | sleep (1); | |
431 | goto retry_lock; | |
432 | } | |
433 | #endif | |
434 | } | |
435 | ||
436 | pfatal_with_name (inname); | |
437 | } | |
438 | ||
08564963 | 439 | { |
8ca83cfd RS |
440 | char buf[1024]; |
441 | ||
442 | while (1) | |
08564963 | 443 | { |
8ca83cfd RS |
444 | nread = read (indesc, buf, sizeof buf); |
445 | if (nread != write (outdesc, buf, nread)) | |
446 | { | |
447 | int saved_errno = errno; | |
448 | unlink (outname); | |
449 | errno = saved_errno; | |
450 | pfatal_with_name (outname); | |
451 | } | |
452 | if (nread < sizeof buf) | |
453 | break; | |
a4deff3c RS |
454 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
455 | if (spool_name) | |
456 | { | |
457 | now = time (0); | |
458 | if (now - touched_lock > 60) | |
459 | { | |
460 | touchlock (); | |
461 | touched_lock = now; | |
462 | } | |
463 | } | |
464 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 465 | } |
08564963 | 466 | } |
237e0016 | 467 | |
e397a017 | 468 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
469 | if (fsync (outdesc) < 0) |
470 | pfatal_and_delete (outname); | |
237e0016 RS |
471 | #endif |
472 | ||
8ca83cfd RS |
473 | /* Check to make sure no errors before we zap the inbox. */ |
474 | if (close (outdesc) != 0) | |
475 | pfatal_and_delete (outname); | |
237e0016 | 476 | |
63cf923d | 477 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
478 | if (! preserve_mail) |
479 | { | |
7f75d5c6 | 480 | #if defined (STRIDE) || defined (XENIX) || defined (WINDOWSNT) |
fea4325c RS |
481 | /* Stride, xenix have file locking, but no ftruncate. |
482 | This mess will do. */ | |
483 | close (open (inname, O_CREAT | O_TRUNC | O_RDWR, 0666)); | |
237e0016 | 484 | #else |
fea4325c RS |
485 | ftruncate (indesc, 0L); |
486 | } | |
237e0016 | 487 | #endif /* STRIDE or XENIX */ |
63cf923d | 488 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
489 | |
490 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 491 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 492 | #else |
8ca83cfd | 493 | close (indesc); |
4293ba7f | 494 | #endif |
237e0016 | 495 | |
63cf923d | 496 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
497 | if (! preserve_mail) |
498 | { | |
499 | /* Delete the input file; if we can't, at least get rid of its | |
500 | contents. */ | |
e97dd183 | 501 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
502 | /* This is generally bad to do, because it destroys the permissions |
503 | that were set on the file. Better to just empty the file. */ | |
504 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 505 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
506 | creat (inname, 0600); |
507 | } | |
63cf923d | 508 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 509 | |
a4deff3c RS |
510 | #ifdef MAIL_USE_MAILLOCK |
511 | /* This has to occur in the child, i.e., in the process that | |
512 | acquired the lock! */ | |
513 | if (spool_name) | |
514 | mailunlock (); | |
515 | #endif | |
8ca83cfd RS |
516 | exit (0); |
517 | } | |
518 | ||
519 | wait (&status); | |
520 | if (!WIFEXITED (status)) | |
521 | exit (1); | |
522 | else if (WRETCODE (status) != 0) | |
523 | exit (WRETCODE (status)); | |
524 | ||
63cf923d | 525 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
526 | #ifdef MAIL_USE_MAILLOCK |
527 | if (! spool_name) | |
528 | #endif /* MAIL_USE_MAILLOCK */ | |
529 | unlink (lockname); | |
63cf923d | 530 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
531 | |
532 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
533 | ||
e2f9d9af | 534 | return 0; |
237e0016 | 535 | } |
a4deff3c RS |
536 | |
537 | #ifdef MAIL_USE_MAILLOCK | |
538 | /* This function uses stat to confirm that the mail directory is | |
539 | identical to the directory of the input file, rather than just | |
540 | string-comparing the two paths, because one or both of them might | |
541 | be symbolic links pointing to some other directory. */ | |
542 | static char * | |
543 | mail_spool_name (inname) | |
544 | char *inname; | |
545 | { | |
546 | struct stat stat1, stat2; | |
547 | char *indir, *fname; | |
548 | int status; | |
549 | ||
550 | if (! (fname = rindex (inname, '/'))) | |
551 | return NULL; | |
552 | ||
553 | fname++; | |
554 | ||
555 | if (stat (MAILDIR, &stat1) < 0) | |
556 | return NULL; | |
557 | ||
558 | indir = (char *) xmalloc (fname - inname + 1); | |
559 | strncpy (indir, inname, fname - inname); | |
560 | indir[fname-inname] = '\0'; | |
561 | ||
562 | ||
563 | status = stat (indir, &stat2); | |
564 | ||
565 | free (indir); | |
566 | ||
567 | if (status < 0) | |
568 | return NULL; | |
569 | ||
c4009c1f RS |
570 | if (stat1.st_dev == stat2.st_dev |
571 | && stat1.st_ino == stat2.st_ino) | |
a4deff3c RS |
572 | return fname; |
573 | ||
574 | return NULL; | |
575 | } | |
576 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
577 | \f |
578 | /* Print error message and exit. */ | |
579 | ||
e2f9d9af | 580 | void |
237e0016 RS |
581 | fatal (s1, s2) |
582 | char *s1, *s2; | |
583 | { | |
584 | if (delete_lockname) | |
585 | unlink (delete_lockname); | |
586 | error (s1, s2); | |
587 | exit (1); | |
588 | } | |
589 | ||
590 | /* Print error message. `s1' is printf control string, `s2' is arg for it. */ | |
591 | ||
e2f9d9af | 592 | void |
b1ce62a8 RS |
593 | error (s1, s2, s3) |
594 | char *s1, *s2, *s3; | |
237e0016 | 595 | { |
e2f9d9af DM |
596 | fprintf (stderr, "movemail: "); |
597 | fprintf (stderr, s1, s2, s3); | |
598 | fprintf (stderr, "\n"); | |
237e0016 RS |
599 | } |
600 | ||
e2f9d9af | 601 | void |
237e0016 RS |
602 | pfatal_with_name (name) |
603 | char *name; | |
604 | { | |
e2f9d9af | 605 | char *s = concat ("", strerror (errno), " for %s"); |
237e0016 RS |
606 | fatal (s, name); |
607 | } | |
608 | ||
e2f9d9af | 609 | void |
cfa191ff RS |
610 | pfatal_and_delete (name) |
611 | char *name; | |
612 | { | |
e2f9d9af | 613 | char *s = concat ("", strerror (errno), " for %s"); |
cfa191ff RS |
614 | unlink (name); |
615 | fatal (s, name); | |
616 | } | |
617 | ||
237e0016 RS |
618 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
619 | ||
620 | char * | |
621 | concat (s1, s2, s3) | |
622 | char *s1, *s2, *s3; | |
623 | { | |
624 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
625 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
626 | ||
627 | strcpy (result, s1); | |
628 | strcpy (result + len1, s2); | |
629 | strcpy (result + len1 + len2, s3); | |
630 | *(result + len1 + len2 + len3) = 0; | |
631 | ||
632 | return result; | |
633 | } | |
634 | ||
635 | /* Like malloc but get fatal error if memory is exhausted. */ | |
636 | ||
2583d6d7 | 637 | long * |
237e0016 | 638 | xmalloc (size) |
e97dd183 | 639 | unsigned size; |
237e0016 | 640 | { |
2583d6d7 | 641 | long *result = (long *) malloc (size); |
237e0016 RS |
642 | if (!result) |
643 | fatal ("virtual memory exhausted", 0); | |
644 | return result; | |
645 | } | |
646 | \f | |
647 | /* This is the guts of the interface to the Post Office Protocol. */ | |
648 | ||
649 | #ifdef MAIL_USE_POP | |
650 | ||
7f75d5c6 | 651 | #ifndef WINDOWSNT |
237e0016 RS |
652 | #include <sys/socket.h> |
653 | #include <netinet/in.h> | |
654 | #include <netdb.h> | |
7f75d5c6 RS |
655 | #else |
656 | #undef _WINSOCKAPI_ | |
657 | #include <winsock.h> | |
658 | #endif | |
cecf0f21 | 659 | #include <pwd.h> |
237e0016 | 660 | |
237e0016 RS |
661 | #define NOTOK (-1) |
662 | #define OK 0 | |
663 | #define DONE 1 | |
664 | ||
665 | char *progname; | |
666 | FILE *sfi; | |
667 | FILE *sfo; | |
2e82e3c3 RS |
668 | char ibuffer[BUFSIZ]; |
669 | char obuffer[BUFSIZ]; | |
237e0016 RS |
670 | char Errmsg[80]; |
671 | ||
fea4325c | 672 | popmail (user, outfile, preserve, password) |
b1ce62a8 RS |
673 | char *user; |
674 | char *outfile; | |
fea4325c | 675 | int preserve; |
7f75d5c6 | 676 | char *password; |
237e0016 | 677 | { |
b1ce62a8 | 678 | int nmsgs, nbytes; |
b1ce62a8 RS |
679 | register int i; |
680 | int mbfi; | |
681 | FILE *mbf; | |
2e82e3c3 | 682 | char *getenv (); |
b32701a7 | 683 | popserver server; |
237e0016 | 684 | |
7f75d5c6 | 685 | server = pop_open (0, user, password, POP_NO_GETPASS); |
2e82e3c3 | 686 | if (! server) |
b1ce62a8 | 687 | { |
2e82e3c3 RS |
688 | error (pop_error); |
689 | return (1); | |
237e0016 RS |
690 | } |
691 | ||
2e82e3c3 | 692 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 693 | { |
2e82e3c3 RS |
694 | error (pop_error); |
695 | return (1); | |
237e0016 RS |
696 | } |
697 | ||
b1ce62a8 RS |
698 | if (!nmsgs) |
699 | { | |
2e82e3c3 RS |
700 | pop_close (server); |
701 | return (0); | |
b1ce62a8 RS |
702 | } |
703 | ||
704 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
705 | if (mbfi < 0) | |
706 | { | |
2e82e3c3 RS |
707 | pop_close (server); |
708 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
709 | return (1); | |
b1ce62a8 RS |
710 | } |
711 | fchown (mbfi, getuid (), -1); | |
712 | ||
7f75d5c6 | 713 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 714 | { |
2e82e3c3 RS |
715 | pop_close (server); |
716 | error ("Error in fdopen: %s", strerror (errno)); | |
717 | close (mbfi); | |
718 | unlink (outfile); | |
719 | return (1); | |
b1ce62a8 RS |
720 | } |
721 | ||
722 | for (i = 1; i <= nmsgs; i++) | |
723 | { | |
724 | mbx_delimit_begin (mbf); | |
ff804ff5 | 725 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 726 | { |
2e82e3c3 | 727 | error (Errmsg); |
b1ce62a8 | 728 | close (mbfi); |
2e82e3c3 | 729 | return (1); |
237e0016 | 730 | } |
b1ce62a8 RS |
731 | mbx_delimit_end (mbf); |
732 | fflush (mbf); | |
2e82e3c3 RS |
733 | if (ferror (mbf)) |
734 | { | |
735 | error ("Error in fflush: %s", strerror (errno)); | |
736 | pop_close (server); | |
737 | close (mbfi); | |
738 | return (1); | |
739 | } | |
237e0016 RS |
740 | } |
741 | ||
2e82e3c3 RS |
742 | /* On AFS, a call to write only modifies the file in the local |
743 | * workstation's AFS cache. The changes are not written to the server | |
744 | * until a call to fsync or close is made. Users with AFS home | |
745 | * directories have lost mail when over quota because these checks were | |
746 | * not made in previous versions of movemail. */ | |
747 | ||
e397a017 | 748 | #ifdef BSD_SYSTEM |
cfa191ff RS |
749 | if (fsync (mbfi) < 0) |
750 | { | |
2e82e3c3 RS |
751 | error ("Error in fsync: %s", strerror (errno)); |
752 | return (1); | |
cfa191ff | 753 | } |
340ff9de | 754 | #endif |
cfa191ff RS |
755 | |
756 | if (close (mbfi) == -1) | |
757 | { | |
2e82e3c3 RS |
758 | error ("Error in close: %s", strerror (errno)); |
759 | return (1); | |
cfa191ff RS |
760 | } |
761 | ||
fea4325c RS |
762 | if (! preserve) |
763 | for (i = 1; i <= nmsgs; i++) | |
764 | { | |
765 | if (pop_delete (server, i)) | |
766 | { | |
767 | error (pop_error); | |
768 | pop_close (server); | |
769 | return (1); | |
770 | } | |
771 | } | |
237e0016 | 772 | |
2e82e3c3 | 773 | if (pop_quit (server)) |
b1ce62a8 | 774 | { |
2e82e3c3 RS |
775 | error (pop_error); |
776 | return (1); | |
237e0016 | 777 | } |
237e0016 | 778 | |
2e82e3c3 | 779 | return (0); |
237e0016 RS |
780 | } |
781 | ||
ff804ff5 KH |
782 | int |
783 | pop_retr (server, msgno, arg) | |
b32701a7 | 784 | popserver server; |
ff804ff5 | 785 | FILE *arg; |
237e0016 | 786 | { |
2e82e3c3 RS |
787 | extern char *strerror (); |
788 | char *line; | |
789 | int ret; | |
237e0016 | 790 | |
2e82e3c3 | 791 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 792 | { |
2e82e3c3 RS |
793 | strncpy (Errmsg, pop_error, sizeof (Errmsg)); |
794 | Errmsg[sizeof (Errmsg)-1] = '\0'; | |
795 | return (NOTOK); | |
237e0016 RS |
796 | } |
797 | ||
d89d0243 | 798 | while ((ret = pop_retrieve_next (server, &line)) >= 0) |
b1ce62a8 | 799 | { |
2e82e3c3 RS |
800 | if (! line) |
801 | break; | |
802 | ||
d89d0243 | 803 | if (mbx_write (line, ret, arg) != OK) |
b1ce62a8 | 804 | { |
2e82e3c3 RS |
805 | strcpy (Errmsg, strerror (errno)); |
806 | pop_close (server); | |
807 | return (NOTOK); | |
237e0016 RS |
808 | } |
809 | } | |
237e0016 | 810 | |
2e82e3c3 | 811 | if (ret) |
b1ce62a8 | 812 | { |
2e82e3c3 RS |
813 | strncpy (Errmsg, pop_error, sizeof (Errmsg)); |
814 | Errmsg[sizeof (Errmsg)-1] = '\0'; | |
815 | return (NOTOK); | |
237e0016 RS |
816 | } |
817 | ||
2e82e3c3 | 818 | return (OK); |
237e0016 RS |
819 | } |
820 | ||
2e82e3c3 RS |
821 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
822 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
823 | && (a[1] == 'r') \ | |
824 | && (a[2] == 'o') \ | |
825 | && (a[3] == 'm') \ | |
826 | && (a[4] == ' ')) | |
237e0016 | 827 | |
2e82e3c3 | 828 | int |
d89d0243 | 829 | mbx_write (line, len, mbf) |
b1ce62a8 | 830 | char *line; |
d89d0243 | 831 | int len; |
b1ce62a8 | 832 | FILE *mbf; |
237e0016 | 833 | { |
d04f5031 | 834 | #ifdef MOVEMAIL_QUOTE_POP_FROM_LINES |
2e82e3c3 RS |
835 | if (IS_FROM_LINE (line)) |
836 | { | |
837 | if (fputc ('>', mbf) == EOF) | |
838 | return (NOTOK); | |
839 | } | |
d04f5031 PE |
840 | #endif |
841 | if (line[0] == '\037') | |
842 | { | |
843 | if (fputs ("^_", mbf) == EOF) | |
844 | return (NOTOK); | |
845 | line++; | |
846 | len--; | |
847 | } | |
d89d0243 | 848 | if (fwrite (line, 1, len, mbf) != len) |
2e82e3c3 RS |
849 | return (NOTOK); |
850 | if (fputc (0x0a, mbf) == EOF) | |
851 | return (NOTOK); | |
852 | return (OK); | |
237e0016 RS |
853 | } |
854 | ||
2e82e3c3 | 855 | int |
b1ce62a8 RS |
856 | mbx_delimit_begin (mbf) |
857 | FILE *mbf; | |
237e0016 | 858 | { |
2e82e3c3 RS |
859 | if (fputs ("\f\n0, unseen,,\n", mbf) == EOF) |
860 | return (NOTOK); | |
861 | return (OK); | |
237e0016 RS |
862 | } |
863 | ||
b1ce62a8 RS |
864 | mbx_delimit_end (mbf) |
865 | FILE *mbf; | |
237e0016 | 866 | { |
2e82e3c3 RS |
867 | if (putc ('\037', mbf) == EOF) |
868 | return (NOTOK); | |
869 | return (OK); | |
237e0016 RS |
870 | } |
871 | ||
872 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
873 | \f |
874 | #ifndef HAVE_STRERROR | |
875 | char * | |
876 | strerror (errnum) | |
877 | int errnum; | |
878 | { | |
879 | extern char *sys_errlist[]; | |
880 | extern int sys_nerr; | |
881 | ||
882 | if (errnum >= 0 && errnum < sys_nerr) | |
883 | return sys_errlist[errnum]; | |
884 | return (char *) "Unknown error"; | |
885 | } | |
886 | ||
887 | #endif /* ! HAVE_STRERROR */ |