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