Commit | Line | Data |
---|---|---|
237e0016 RS |
1 | /* movemail foo bar -- move file foo to file bar, |
2 | locking file foo the way /bin/mail respects. | |
4ee9629e | 3 | Copyright (C) 1986, 92, 93, 94, 96, 1999 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. | |
177c0ea7 | 42 | * |
237e0016 RS |
43 | * New module: popmail.c |
44 | * Modified routines: | |
cfa191ff | 45 | * main - added code within #ifdef MAIL_USE_POP; added setuid (getuid ()) |
177c0ea7 | 46 | * after POP code. |
237e0016 RS |
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 | 57 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ |
752fb472 | 58 | #include <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> |
cc3b64e8 | 64 | |
fea4325c | 65 | #include <getopt.h> |
f72adc12 EZ |
66 | #ifdef HAVE_UNISTD_H |
67 | #include <unistd.h> | |
68 | #endif | |
cc3b64e8 DL |
69 | #ifdef HAVE_FCNTL_H |
70 | #include <fcntl.h> | |
71 | #endif | |
f72adc12 | 72 | #include "syswait.h" |
2e82e3c3 RS |
73 | #ifdef MAIL_USE_POP |
74 | #include "pop.h" | |
75 | #endif | |
237e0016 | 76 | |
91cf09ac RS |
77 | #ifdef MSDOS |
78 | #undef access | |
79 | #endif /* MSDOS */ | |
80 | ||
61946d67 RS |
81 | #ifndef DIRECTORY_SEP |
82 | #define DIRECTORY_SEP '/' | |
83 | #endif | |
84 | #ifndef IS_DIRECTORY_SEP | |
85 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
86 | #endif | |
87 | ||
7f75d5c6 | 88 | #ifdef WINDOWSNT |
677a7bcf | 89 | #include "ntlib.h" |
7f75d5c6 RS |
90 | #undef access |
91 | #undef unlink | |
92 | #define fork() 0 | |
4822b2e5 | 93 | #define wait(var) (*(var) = 0) |
7f75d5c6 RS |
94 | /* Unfortunately, Samba doesn't seem to properly lock Unix files even |
95 | though the locking call succeeds (and indeed blocks local access from | |
96 | other NT programs). If you have direct file access using an NFS | |
97 | client or something other than Samba, the locking call might work | |
677a7bcf RS |
98 | properly - make sure it does before you enable this! |
99 | ||
100 | [18-Feb-97 andrewi] I now believe my comment above to be incorrect, | |
101 | since it was based on a misunderstanding of how locking calls are | |
102 | implemented and used on Unix. */ | |
103 | //#define DISABLE_DIRECT_ACCESS | |
104 | ||
677a7bcf | 105 | #include <fcntl.h> |
7f75d5c6 RS |
106 | #endif /* WINDOWSNT */ |
107 | ||
4ec9a77a RS |
108 | #ifndef F_OK |
109 | #define F_OK 0 | |
110 | #define X_OK 1 | |
111 | #define W_OK 2 | |
112 | #define R_OK 4 | |
113 | #endif | |
237e0016 | 114 | |
7f75d5c6 | 115 | #if defined (XENIX) || defined (WINDOWSNT) |
237e0016 RS |
116 | #include <sys/locking.h> |
117 | #endif | |
118 | ||
63cf923d RS |
119 | #ifdef MAIL_USE_LOCKF |
120 | #define MAIL_USE_SYSTEM_LOCK | |
121 | #endif | |
122 | ||
123 | #ifdef MAIL_USE_FLOCK | |
124 | #define MAIL_USE_SYSTEM_LOCK | |
125 | #endif | |
126 | ||
4293ba7f RS |
127 | #ifdef MAIL_USE_MMDF |
128 | extern int lk_open (), lk_close (); | |
129 | #endif | |
130 | ||
a4deff3c | 131 | #if !defined (MAIL_USE_SYSTEM_LOCK) && !defined (MAIL_USE_MMDF) && \ |
dd843b6a DL |
132 | (defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) && \ |
133 | defined (HAVE_MAILLOCK_H) | |
a4deff3c RS |
134 | #include <maillock.h> |
135 | /* We can't use maillock unless we know what directory system mail | |
136 | files appear in. */ | |
137 | #ifdef MAILDIR | |
138 | #define MAIL_USE_MAILLOCK | |
139 | static char *mail_spool_name (); | |
140 | #endif | |
141 | #endif | |
142 | ||
e97dd183 | 143 | #ifndef errno |
237e0016 | 144 | extern int errno; |
e97dd183 | 145 | #endif |
e2f9d9af | 146 | char *strerror (); |
517699ca DL |
147 | #ifdef HAVE_INDEX |
148 | extern char *index __P ((const char *, int)); | |
149 | #endif | |
150 | #ifdef HAVE_RINDEX | |
151 | extern char *rindex __P((const char *, int)); | |
152 | #endif | |
e2f9d9af DM |
153 | |
154 | void fatal (); | |
155 | void error (); | |
156 | void pfatal_with_name (); | |
157 | void pfatal_and_delete (); | |
158 | char *concat (); | |
2583d6d7 | 159 | long *xmalloc (); |
e2f9d9af DM |
160 | int popmail (); |
161 | int pop_retr (); | |
162 | int mbx_write (); | |
163 | int mbx_delimit_begin (); | |
164 | int mbx_delimit_end (); | |
237e0016 RS |
165 | |
166 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
167 | char *delete_lockname; | |
168 | ||
e2f9d9af | 169 | int |
237e0016 RS |
170 | main (argc, argv) |
171 | int argc; | |
172 | char **argv; | |
173 | { | |
174 | char *inname, *outname; | |
175 | int indesc, outdesc; | |
237e0016 | 176 | int nread; |
8ca83cfd | 177 | WAITTYPE status; |
fea4325c | 178 | int c, preserve_mail = 0; |
237e0016 | 179 | |
63cf923d | 180 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
181 | struct stat st; |
182 | long now; | |
183 | int tem; | |
184 | char *lockname, *p; | |
906ad89d | 185 | char *tempname; |
237e0016 | 186 | int desc; |
63cf923d | 187 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 188 | |
a4deff3c RS |
189 | #ifdef MAIL_USE_MAILLOCK |
190 | char *spool_name; | |
191 | #endif | |
192 | ||
a2997b0f KH |
193 | #ifdef MAIL_USE_POP |
194 | int pop_reverse_order = 0; | |
195 | # define ARGSTR "pr" | |
196 | #else /* ! MAIL_USE_POP */ | |
197 | # define ARGSTR "p" | |
198 | #endif /* MAIL_USE_POP */ | |
199 | ||
9112a2a9 AI |
200 | #ifdef WINDOWSNT |
201 | /* Ensure all file i/o is in binary mode. */ | |
202 | _fmode = _O_BINARY; | |
203 | #endif | |
204 | ||
237e0016 RS |
205 | delete_lockname = 0; |
206 | ||
a2997b0f | 207 | while ((c = getopt (argc, argv, ARGSTR)) != EOF) |
e2f9d9af | 208 | { |
fea4325c | 209 | switch (c) { |
a2997b0f KH |
210 | #ifdef MAIL_USE_POP |
211 | case 'r': | |
212 | pop_reverse_order = 1; | |
213 | break; | |
214 | #endif | |
fea4325c RS |
215 | case 'p': |
216 | preserve_mail++; | |
217 | break; | |
218 | default: | |
65396510 | 219 | exit (EXIT_FAILURE); |
fea4325c RS |
220 | } |
221 | } | |
222 | ||
223 | if ( | |
224 | #ifdef MAIL_USE_POP | |
225 | (argc - optind < 2) || (argc - optind > 3) | |
226 | #else | |
227 | (argc - optind != 2) | |
228 | #endif | |
229 | ) | |
230 | { | |
fea4325c | 231 | #ifdef MAIL_USE_POP |
bb5618fe JB |
232 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", |
233 | " [POP-password]"); | |
fea4325c | 234 | #else |
bb5618fe | 235 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", ""); |
fea4325c | 236 | #endif |
65396510 | 237 | exit (EXIT_FAILURE); |
e2f9d9af | 238 | } |
237e0016 | 239 | |
fea4325c RS |
240 | inname = argv[optind]; |
241 | outname = argv[optind+1]; | |
237e0016 | 242 | |
4293ba7f RS |
243 | #ifdef MAIL_USE_MMDF |
244 | mmdf_init (argv[0]); | |
245 | #endif | |
246 | ||
af7bd34e RS |
247 | if (*outname == 0) |
248 | fatal ("Destination file name is empty", 0); | |
249 | ||
b1ce62a8 | 250 | /* Check access to output file. */ |
237e0016 RS |
251 | if (access (outname, F_OK) == 0 && access (outname, W_OK) != 0) |
252 | pfatal_with_name (outname); | |
253 | ||
8e6208c5 | 254 | /* Also check that outname's directory is writable to the real uid. */ |
237e0016 | 255 | { |
91cf09ac | 256 | char *buf = (char *) xmalloc (strlen (outname) + 1); |
e2f9d9af | 257 | char *p; |
237e0016 RS |
258 | strcpy (buf, outname); |
259 | p = buf + strlen (buf); | |
7f75d5c6 | 260 | while (p > buf && !IS_DIRECTORY_SEP (p[-1])) |
237e0016 RS |
261 | *--p = 0; |
262 | if (p == buf) | |
263 | *p++ = '.'; | |
264 | if (access (buf, W_OK) != 0) | |
265 | pfatal_with_name (buf); | |
266 | free (buf); | |
267 | } | |
268 | ||
269 | #ifdef MAIL_USE_POP | |
12a0565a | 270 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 271 | { |
b3112191 | 272 | int status; |
237e0016 | 273 | |
fea4325c | 274 | status = popmail (inname + 3, outname, preserve_mail, |
a2997b0f KH |
275 | (argc - optind == 3) ? argv[optind+2] : NULL, |
276 | pop_reverse_order); | |
237e0016 RS |
277 | exit (status); |
278 | } | |
279 | ||
cfa191ff | 280 | setuid (getuid ()); |
237e0016 RS |
281 | #endif /* MAIL_USE_POP */ |
282 | ||
7f75d5c6 RS |
283 | #ifndef DISABLE_DIRECT_ACCESS |
284 | ||
b1ce62a8 RS |
285 | /* Check access to input file. */ |
286 | if (access (inname, R_OK | W_OK) != 0) | |
287 | pfatal_with_name (inname); | |
288 | ||
4293ba7f | 289 | #ifndef MAIL_USE_MMDF |
63cf923d | 290 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
291 | #ifdef MAIL_USE_MAILLOCK |
292 | spool_name = mail_spool_name (inname); | |
293 | if (! spool_name) | |
294 | #endif | |
237e0016 | 295 | { |
a4deff3c RS |
296 | /* Use a lock file named after our first argument with .lock appended: |
297 | If it exists, the mail file is locked. */ | |
298 | /* Note: this locking mechanism is *required* by the mailer | |
299 | (on systems which use it) to prevent loss of mail. | |
300 | ||
301 | On systems that use a lock file, extracting the mail without locking | |
302 | WILL occasionally cause loss of mail due to timing errors! | |
303 | ||
304 | So, if creation of the lock file fails | |
305 | due to access permission on the mail spool directory, | |
306 | you simply MUST change the permission | |
307 | and/or make movemail a setgid program | |
308 | so it can create lock files properly. | |
309 | ||
310 | You might also wish to verify that your system is one | |
311 | which uses lock files for this purpose. Some systems use other methods. | |
312 | ||
313 | If your system uses the `flock' system call for mail locking, | |
314 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
315 | and recompile movemail. If the s- file for your system | |
316 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
317 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
318 | ||
319 | lockname = concat (inname, ".lock", ""); | |
320 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
321 | strcpy (tempname, inname); | |
322 | p = tempname + strlen (tempname); | |
323 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
324 | p--; | |
325 | *p = 0; | |
326 | strcpy (p, "EXXXXXX"); | |
327 | mktemp (tempname); | |
cfa191ff | 328 | unlink (tempname); |
237e0016 | 329 | |
a4deff3c | 330 | while (1) |
237e0016 | 331 | { |
a4deff3c RS |
332 | /* Create the lock file, but not under the lock file name. */ |
333 | /* Give up if cannot do that. */ | |
334 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
335 | if (desc < 0) | |
336 | { | |
337 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
4b265472 | 338 | sprintf (message, "creating %s, which would become the lock file", |
a4deff3c RS |
339 | tempname); |
340 | pfatal_with_name (message); | |
341 | } | |
342 | close (desc); | |
343 | ||
344 | tem = link (tempname, lockname); | |
345 | unlink (tempname); | |
346 | if (tem >= 0) | |
347 | break; | |
348 | sleep (1); | |
349 | ||
350 | /* If lock file is five minutes old, unlock it. | |
351 | Five minutes should be good enough to cope with crashes | |
352 | and wedgitude, and long enough to avoid being fooled | |
353 | by time differences between machines. */ | |
354 | if (stat (lockname, &st) >= 0) | |
355 | { | |
356 | now = time (0); | |
357 | if (st.st_ctime < now - 300) | |
358 | unlink (lockname); | |
359 | } | |
237e0016 | 360 | } |
237e0016 | 361 | |
a4deff3c RS |
362 | delete_lockname = lockname; |
363 | } | |
63cf923d RS |
364 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
365 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 366 | |
8ca83cfd RS |
367 | if (fork () == 0) |
368 | { | |
25025815 | 369 | int lockcount = 0; |
a4deff3c RS |
370 | int status = 0; |
371 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
372 | long touched_lock, now; | |
373 | #endif | |
25025815 | 374 | |
d5216c20 | 375 | setuid (getuid ()); |
8ca83cfd | 376 | |
63cf923d RS |
377 | #ifndef MAIL_USE_MMDF |
378 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 379 | indesc = open (inname, O_RDWR); |
63cf923d | 380 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 381 | indesc = open (inname, O_RDONLY); |
63cf923d | 382 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
383 | #else /* MAIL_USE_MMDF */ |
384 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
385 | #endif /* MAIL_USE_MMDF */ |
386 | ||
8ca83cfd RS |
387 | if (indesc < 0) |
388 | pfatal_with_name (inname); | |
237e0016 | 389 | |
e397a017 | 390 | #if defined (BSD_SYSTEM) || defined (XENIX) |
8ca83cfd RS |
391 | /* In case movemail is setuid to root, make sure the user can |
392 | read the output file. */ | |
393 | /* This is desirable for all systems | |
394 | but I don't want to assume all have the umask system call */ | |
395 | umask (umask (0) & 0333); | |
e397a017 | 396 | #endif /* BSD_SYSTEM || XENIX */ |
8ca83cfd RS |
397 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
398 | if (outdesc < 0) | |
399 | pfatal_with_name (outname); | |
25025815 RS |
400 | |
401 | /* This label exists so we can retry locking | |
402 | after a delay, if it got EAGAIN or EBUSY. */ | |
403 | retry_lock: | |
404 | ||
405 | /* Try to lock it. */ | |
a4deff3c RS |
406 | #ifdef MAIL_USE_MAILLOCK |
407 | if (spool_name) | |
408 | { | |
409 | /* The "0 - " is to make it a negative number if maillock returns | |
410 | non-zero. */ | |
411 | status = 0 - maillock (spool_name, 1); | |
412 | #ifdef HAVE_TOUCHLOCK | |
413 | touched_lock = time (0); | |
414 | #endif | |
415 | lockcount = 5; | |
416 | } | |
417 | else | |
418 | #endif /* MAIL_USE_MAILLOCK */ | |
419 | { | |
63cf923d RS |
420 | #ifdef MAIL_USE_SYSTEM_LOCK |
421 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 422 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 423 | #else /* not MAIL_USE_LOCKF */ |
237e0016 | 424 | #ifdef XENIX |
a4deff3c | 425 | status = locking (indesc, LK_RLCK, 0L); |
7f75d5c6 RS |
426 | #else |
427 | #ifdef WINDOWSNT | |
a4deff3c | 428 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 429 | #else |
a4deff3c | 430 | status = flock (indesc, LOCK_EX); |
237e0016 | 431 | #endif |
7f75d5c6 | 432 | #endif |
63cf923d RS |
433 | #endif /* not MAIL_USE_LOCKF */ |
434 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 435 | } |
237e0016 | 436 | |
25025815 RS |
437 | /* If it fails, retry up to 5 times |
438 | for certain failure codes. */ | |
439 | if (status < 0) | |
440 | { | |
441 | if (++lockcount <= 5) | |
442 | { | |
443 | #ifdef EAGAIN | |
444 | if (errno == EAGAIN) | |
445 | { | |
446 | sleep (1); | |
447 | goto retry_lock; | |
448 | } | |
449 | #endif | |
450 | #ifdef EBUSY | |
451 | if (errno == EBUSY) | |
452 | { | |
453 | sleep (1); | |
454 | goto retry_lock; | |
455 | } | |
456 | #endif | |
457 | } | |
458 | ||
459 | pfatal_with_name (inname); | |
460 | } | |
177c0ea7 | 461 | |
08564963 | 462 | { |
8ca83cfd RS |
463 | char buf[1024]; |
464 | ||
465 | while (1) | |
08564963 | 466 | { |
8ca83cfd RS |
467 | nread = read (indesc, buf, sizeof buf); |
468 | if (nread != write (outdesc, buf, nread)) | |
469 | { | |
470 | int saved_errno = errno; | |
471 | unlink (outname); | |
472 | errno = saved_errno; | |
473 | pfatal_with_name (outname); | |
474 | } | |
475 | if (nread < sizeof buf) | |
476 | break; | |
a4deff3c RS |
477 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
478 | if (spool_name) | |
479 | { | |
480 | now = time (0); | |
481 | if (now - touched_lock > 60) | |
482 | { | |
483 | touchlock (); | |
484 | touched_lock = now; | |
485 | } | |
486 | } | |
487 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 488 | } |
08564963 | 489 | } |
237e0016 | 490 | |
e397a017 | 491 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
492 | if (fsync (outdesc) < 0) |
493 | pfatal_and_delete (outname); | |
237e0016 RS |
494 | #endif |
495 | ||
8ca83cfd RS |
496 | /* Check to make sure no errors before we zap the inbox. */ |
497 | if (close (outdesc) != 0) | |
498 | pfatal_and_delete (outname); | |
237e0016 | 499 | |
63cf923d | 500 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
501 | if (! preserve_mail) |
502 | { | |
3288d108 | 503 | #if defined (STRIDE) || defined (XENIX) |
fea4325c RS |
504 | /* Stride, xenix have file locking, but no ftruncate. |
505 | This mess will do. */ | |
506 | close (open (inname, O_CREAT | O_TRUNC | O_RDWR, 0666)); | |
237e0016 | 507 | #else |
fea4325c | 508 | ftruncate (indesc, 0L); |
237e0016 | 509 | #endif /* STRIDE or XENIX */ |
b1cb2966 | 510 | } |
63cf923d | 511 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
512 | |
513 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 514 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 515 | #else |
8ca83cfd | 516 | close (indesc); |
4293ba7f | 517 | #endif |
237e0016 | 518 | |
63cf923d | 519 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
520 | if (! preserve_mail) |
521 | { | |
522 | /* Delete the input file; if we can't, at least get rid of its | |
523 | contents. */ | |
e97dd183 | 524 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
525 | /* This is generally bad to do, because it destroys the permissions |
526 | that were set on the file. Better to just empty the file. */ | |
527 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 528 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
529 | creat (inname, 0600); |
530 | } | |
63cf923d | 531 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 532 | |
a4deff3c RS |
533 | #ifdef MAIL_USE_MAILLOCK |
534 | /* This has to occur in the child, i.e., in the process that | |
535 | acquired the lock! */ | |
536 | if (spool_name) | |
537 | mailunlock (); | |
538 | #endif | |
65396510 | 539 | exit (EXIT_SUCCESS); |
8ca83cfd RS |
540 | } |
541 | ||
542 | wait (&status); | |
543 | if (!WIFEXITED (status)) | |
65396510 | 544 | exit (EXIT_FAILURE); |
8ca83cfd RS |
545 | else if (WRETCODE (status) != 0) |
546 | exit (WRETCODE (status)); | |
547 | ||
63cf923d | 548 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
549 | #ifdef MAIL_USE_MAILLOCK |
550 | if (! spool_name) | |
551 | #endif /* MAIL_USE_MAILLOCK */ | |
552 | unlink (lockname); | |
63cf923d | 553 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
554 | |
555 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
556 | ||
65396510 | 557 | return EXIT_SUCCESS; |
237e0016 | 558 | } |
a4deff3c RS |
559 | |
560 | #ifdef MAIL_USE_MAILLOCK | |
561 | /* This function uses stat to confirm that the mail directory is | |
562 | identical to the directory of the input file, rather than just | |
563 | string-comparing the two paths, because one or both of them might | |
564 | be symbolic links pointing to some other directory. */ | |
565 | static char * | |
566 | mail_spool_name (inname) | |
567 | char *inname; | |
568 | { | |
569 | struct stat stat1, stat2; | |
570 | char *indir, *fname; | |
571 | int status; | |
572 | ||
573 | if (! (fname = rindex (inname, '/'))) | |
574 | return NULL; | |
575 | ||
576 | fname++; | |
577 | ||
578 | if (stat (MAILDIR, &stat1) < 0) | |
579 | return NULL; | |
580 | ||
581 | indir = (char *) xmalloc (fname - inname + 1); | |
582 | strncpy (indir, inname, fname - inname); | |
583 | indir[fname-inname] = '\0'; | |
584 | ||
585 | ||
586 | status = stat (indir, &stat2); | |
587 | ||
588 | free (indir); | |
589 | ||
590 | if (status < 0) | |
591 | return NULL; | |
592 | ||
c4009c1f RS |
593 | if (stat1.st_dev == stat2.st_dev |
594 | && stat1.st_ino == stat2.st_ino) | |
a4deff3c RS |
595 | return fname; |
596 | ||
597 | return NULL; | |
598 | } | |
599 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
600 | \f |
601 | /* Print error message and exit. */ | |
602 | ||
e2f9d9af | 603 | void |
237e0016 RS |
604 | fatal (s1, s2) |
605 | char *s1, *s2; | |
606 | { | |
607 | if (delete_lockname) | |
608 | unlink (delete_lockname); | |
cc3b64e8 | 609 | error (s1, s2, 0); |
65396510 | 610 | exit (EXIT_FAILURE); |
237e0016 RS |
611 | } |
612 | ||
cc3b64e8 DL |
613 | /* Print error message. `s1' is printf control string, `s2' and `s3' |
614 | are args for it or null. */ | |
237e0016 | 615 | |
e2f9d9af | 616 | void |
b1ce62a8 RS |
617 | error (s1, s2, s3) |
618 | char *s1, *s2, *s3; | |
237e0016 | 619 | { |
e2f9d9af | 620 | fprintf (stderr, "movemail: "); |
cc3b64e8 DL |
621 | if (s3) |
622 | fprintf (stderr, s1, s2, s3); | |
623 | else if (s2) | |
624 | fprintf (stderr, s1, s2); | |
625 | else | |
626 | fprintf (stderr, s1); | |
e2f9d9af | 627 | fprintf (stderr, "\n"); |
237e0016 RS |
628 | } |
629 | ||
e2f9d9af | 630 | void |
237e0016 RS |
631 | pfatal_with_name (name) |
632 | char *name; | |
633 | { | |
e2f9d9af | 634 | char *s = concat ("", strerror (errno), " for %s"); |
237e0016 RS |
635 | fatal (s, name); |
636 | } | |
637 | ||
e2f9d9af | 638 | void |
cfa191ff RS |
639 | pfatal_and_delete (name) |
640 | char *name; | |
641 | { | |
e2f9d9af | 642 | char *s = concat ("", strerror (errno), " for %s"); |
cfa191ff RS |
643 | unlink (name); |
644 | fatal (s, name); | |
645 | } | |
646 | ||
237e0016 RS |
647 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
648 | ||
649 | char * | |
650 | concat (s1, s2, s3) | |
651 | char *s1, *s2, *s3; | |
652 | { | |
653 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
654 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
655 | ||
656 | strcpy (result, s1); | |
657 | strcpy (result + len1, s2); | |
658 | strcpy (result + len1 + len2, s3); | |
659 | *(result + len1 + len2 + len3) = 0; | |
660 | ||
661 | return result; | |
662 | } | |
663 | ||
664 | /* Like malloc but get fatal error if memory is exhausted. */ | |
665 | ||
2583d6d7 | 666 | long * |
237e0016 | 667 | xmalloc (size) |
e97dd183 | 668 | unsigned size; |
237e0016 | 669 | { |
2583d6d7 | 670 | long *result = (long *) malloc (size); |
237e0016 RS |
671 | if (!result) |
672 | fatal ("virtual memory exhausted", 0); | |
673 | return result; | |
674 | } | |
675 | \f | |
676 | /* This is the guts of the interface to the Post Office Protocol. */ | |
677 | ||
678 | #ifdef MAIL_USE_POP | |
679 | ||
7f75d5c6 | 680 | #ifndef WINDOWSNT |
237e0016 RS |
681 | #include <sys/socket.h> |
682 | #include <netinet/in.h> | |
683 | #include <netdb.h> | |
7f75d5c6 RS |
684 | #else |
685 | #undef _WINSOCKAPI_ | |
686 | #include <winsock.h> | |
687 | #endif | |
cecf0f21 | 688 | #include <pwd.h> |
237e0016 | 689 | |
237e0016 RS |
690 | #define NOTOK (-1) |
691 | #define OK 0 | |
692 | #define DONE 1 | |
693 | ||
694 | char *progname; | |
695 | FILE *sfi; | |
696 | FILE *sfo; | |
2e82e3c3 RS |
697 | char ibuffer[BUFSIZ]; |
698 | char obuffer[BUFSIZ]; | |
752fb472 DL |
699 | char Errmsg[200]; /* POP errors, at least, can exceed |
700 | the original length of 80. */ | |
237e0016 | 701 | |
476b2799 GM |
702 | /* |
703 | * The full legal syntax for a POP mailbox specification for movemail | |
704 | * is "po:username:hostname". The ":hostname" is optional; if it is | |
705 | * omitted, the MAILHOST environment variable will be consulted. Note | |
706 | * that by the time popmail() is called the "po:" has been stripped | |
707 | * off of the front of the mailbox name. | |
708 | * | |
709 | * If the mailbox is in the form "po:username:hostname", then it is | |
710 | * modified by this function -- the second colon is replaced by a | |
711 | * null. | |
65396510 TTN |
712 | * |
713 | * Return a value suitable for passing to `exit'. | |
476b2799 GM |
714 | */ |
715 | ||
cc3b64e8 | 716 | int |
476b2799 GM |
717 | popmail (mailbox, outfile, preserve, password, reverse_order) |
718 | char *mailbox; | |
b1ce62a8 | 719 | char *outfile; |
fea4325c | 720 | int preserve; |
7f75d5c6 | 721 | char *password; |
a2997b0f | 722 | int reverse_order; |
237e0016 | 723 | { |
b1ce62a8 | 724 | int nmsgs, nbytes; |
b1ce62a8 RS |
725 | register int i; |
726 | int mbfi; | |
727 | FILE *mbf; | |
2e82e3c3 | 728 | char *getenv (); |
b32701a7 | 729 | popserver server; |
a2997b0f | 730 | int start, end, increment; |
476b2799 GM |
731 | char *user, *hostname; |
732 | ||
733 | user = mailbox; | |
734 | if ((hostname = index(mailbox, ':'))) | |
735 | *hostname++ = '\0'; | |
237e0016 | 736 | |
476b2799 | 737 | server = pop_open (hostname, user, password, POP_NO_GETPASS); |
2e82e3c3 | 738 | if (! server) |
b1ce62a8 | 739 | { |
cc3b64e8 | 740 | error ("Error connecting to POP server: %s", pop_error, 0); |
65396510 | 741 | return EXIT_FAILURE; |
237e0016 RS |
742 | } |
743 | ||
2e82e3c3 | 744 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 745 | { |
cc3b64e8 | 746 | error ("Error getting message count from POP server: %s", pop_error, 0); |
65396510 | 747 | return EXIT_FAILURE; |
237e0016 RS |
748 | } |
749 | ||
b1ce62a8 RS |
750 | if (!nmsgs) |
751 | { | |
2e82e3c3 | 752 | pop_close (server); |
65396510 | 753 | return EXIT_SUCCESS; |
b1ce62a8 RS |
754 | } |
755 | ||
756 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
757 | if (mbfi < 0) | |
758 | { | |
2e82e3c3 RS |
759 | pop_close (server); |
760 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
65396510 | 761 | return EXIT_FAILURE; |
b1ce62a8 RS |
762 | } |
763 | fchown (mbfi, getuid (), -1); | |
764 | ||
7f75d5c6 | 765 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 766 | { |
2e82e3c3 | 767 | pop_close (server); |
cc3b64e8 | 768 | error ("Error in fdopen: %s", strerror (errno), 0); |
2e82e3c3 RS |
769 | close (mbfi); |
770 | unlink (outfile); | |
65396510 | 771 | return EXIT_FAILURE; |
b1ce62a8 RS |
772 | } |
773 | ||
a2997b0f KH |
774 | if (reverse_order) |
775 | { | |
776 | start = nmsgs; | |
777 | end = 1; | |
778 | increment = -1; | |
779 | } | |
780 | else | |
781 | { | |
782 | start = 1; | |
783 | end = nmsgs; | |
784 | increment = 1; | |
785 | } | |
786 | ||
787 | for (i = start; i * increment <= end * increment; i += increment) | |
b1ce62a8 RS |
788 | { |
789 | mbx_delimit_begin (mbf); | |
ff804ff5 | 790 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 791 | { |
cc3b64e8 | 792 | error (Errmsg, 0, 0); |
b1ce62a8 | 793 | close (mbfi); |
65396510 | 794 | return EXIT_FAILURE; |
237e0016 | 795 | } |
b1ce62a8 RS |
796 | mbx_delimit_end (mbf); |
797 | fflush (mbf); | |
2e82e3c3 RS |
798 | if (ferror (mbf)) |
799 | { | |
cc3b64e8 | 800 | error ("Error in fflush: %s", strerror (errno), 0); |
2e82e3c3 RS |
801 | pop_close (server); |
802 | close (mbfi); | |
65396510 | 803 | return EXIT_FAILURE; |
2e82e3c3 | 804 | } |
237e0016 RS |
805 | } |
806 | ||
2e82e3c3 RS |
807 | /* On AFS, a call to write only modifies the file in the local |
808 | * workstation's AFS cache. The changes are not written to the server | |
809 | * until a call to fsync or close is made. Users with AFS home | |
810 | * directories have lost mail when over quota because these checks were | |
811 | * not made in previous versions of movemail. */ | |
812 | ||
e397a017 | 813 | #ifdef BSD_SYSTEM |
cfa191ff RS |
814 | if (fsync (mbfi) < 0) |
815 | { | |
08fa58c9 | 816 | error ("Error in fsync: %s", strerror (errno), 0); |
65396510 | 817 | return EXIT_FAILURE; |
cfa191ff | 818 | } |
340ff9de | 819 | #endif |
cfa191ff RS |
820 | |
821 | if (close (mbfi) == -1) | |
822 | { | |
cc3b64e8 | 823 | error ("Error in close: %s", strerror (errno), 0); |
65396510 | 824 | return EXIT_FAILURE; |
cfa191ff RS |
825 | } |
826 | ||
fea4325c RS |
827 | if (! preserve) |
828 | for (i = 1; i <= nmsgs; i++) | |
829 | { | |
830 | if (pop_delete (server, i)) | |
831 | { | |
cc3b64e8 | 832 | error ("Error from POP server: %s", pop_error, 0); |
fea4325c | 833 | pop_close (server); |
65396510 | 834 | return EXIT_FAILURE; |
fea4325c RS |
835 | } |
836 | } | |
237e0016 | 837 | |
2e82e3c3 | 838 | if (pop_quit (server)) |
b1ce62a8 | 839 | { |
cc3b64e8 | 840 | error ("Error from POP server: %s", pop_error, 0); |
65396510 | 841 | return EXIT_FAILURE; |
237e0016 | 842 | } |
177c0ea7 | 843 | |
65396510 | 844 | return EXIT_SUCCESS; |
237e0016 RS |
845 | } |
846 | ||
ff804ff5 KH |
847 | int |
848 | pop_retr (server, msgno, arg) | |
b32701a7 | 849 | popserver server; |
b553981f | 850 | int msgno; |
ff804ff5 | 851 | FILE *arg; |
237e0016 | 852 | { |
2e82e3c3 RS |
853 | extern char *strerror (); |
854 | char *line; | |
855 | int ret; | |
237e0016 | 856 | |
2e82e3c3 | 857 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 858 | { |
9b956af2 KH |
859 | char *error = concat ("Error from POP server: ", pop_error, ""); |
860 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 861 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 862 | free(error); |
2e82e3c3 | 863 | return (NOTOK); |
237e0016 RS |
864 | } |
865 | ||
d89d0243 | 866 | while ((ret = pop_retrieve_next (server, &line)) >= 0) |
b1ce62a8 | 867 | { |
2e82e3c3 RS |
868 | if (! line) |
869 | break; | |
870 | ||
d89d0243 | 871 | if (mbx_write (line, ret, arg) != OK) |
b1ce62a8 | 872 | { |
2e82e3c3 RS |
873 | strcpy (Errmsg, strerror (errno)); |
874 | pop_close (server); | |
875 | return (NOTOK); | |
237e0016 RS |
876 | } |
877 | } | |
237e0016 | 878 | |
2e82e3c3 | 879 | if (ret) |
b1ce62a8 | 880 | { |
9b956af2 KH |
881 | char *error = concat ("Error from POP server: ", pop_error, ""); |
882 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 883 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 884 | free(error); |
2e82e3c3 | 885 | return (NOTOK); |
237e0016 RS |
886 | } |
887 | ||
2e82e3c3 | 888 | return (OK); |
237e0016 RS |
889 | } |
890 | ||
2e82e3c3 RS |
891 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
892 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
893 | && (a[1] == 'r') \ | |
894 | && (a[2] == 'o') \ | |
895 | && (a[3] == 'm') \ | |
896 | && (a[4] == ' ')) | |
237e0016 | 897 | |
2e82e3c3 | 898 | int |
d89d0243 | 899 | mbx_write (line, len, mbf) |
b1ce62a8 | 900 | char *line; |
d89d0243 | 901 | int len; |
b1ce62a8 | 902 | FILE *mbf; |
237e0016 | 903 | { |
d04f5031 | 904 | #ifdef MOVEMAIL_QUOTE_POP_FROM_LINES |
2e82e3c3 RS |
905 | if (IS_FROM_LINE (line)) |
906 | { | |
907 | if (fputc ('>', mbf) == EOF) | |
908 | return (NOTOK); | |
909 | } | |
d04f5031 PE |
910 | #endif |
911 | if (line[0] == '\037') | |
912 | { | |
913 | if (fputs ("^_", mbf) == EOF) | |
914 | return (NOTOK); | |
915 | line++; | |
916 | len--; | |
917 | } | |
177c0ea7 | 918 | if (fwrite (line, 1, len, mbf) != len) |
2e82e3c3 RS |
919 | return (NOTOK); |
920 | if (fputc (0x0a, mbf) == EOF) | |
921 | return (NOTOK); | |
922 | return (OK); | |
237e0016 RS |
923 | } |
924 | ||
2e82e3c3 | 925 | int |
b1ce62a8 RS |
926 | mbx_delimit_begin (mbf) |
927 | FILE *mbf; | |
237e0016 | 928 | { |
2e82e3c3 RS |
929 | if (fputs ("\f\n0, unseen,,\n", mbf) == EOF) |
930 | return (NOTOK); | |
931 | return (OK); | |
237e0016 RS |
932 | } |
933 | ||
cc3b64e8 | 934 | int |
b1ce62a8 RS |
935 | mbx_delimit_end (mbf) |
936 | FILE *mbf; | |
237e0016 | 937 | { |
2e82e3c3 RS |
938 | if (putc ('\037', mbf) == EOF) |
939 | return (NOTOK); | |
940 | return (OK); | |
237e0016 RS |
941 | } |
942 | ||
943 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
944 | \f |
945 | #ifndef HAVE_STRERROR | |
946 | char * | |
947 | strerror (errnum) | |
948 | int errnum; | |
949 | { | |
950 | extern char *sys_errlist[]; | |
951 | extern int sys_nerr; | |
952 | ||
953 | if (errnum >= 0 && errnum < sys_nerr) | |
954 | return sys_errlist[errnum]; | |
955 | return (char *) "Unknown error"; | |
956 | } | |
957 | ||
958 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
959 | |
960 | /* arch-tag: 1c323112-41fe-4fe5-8de9-494de631f73f | |
961 | (do not change this comment) */ | |
65396510 TTN |
962 | |
963 | /* movemail.c ends here */ |