Commit | Line | Data |
---|---|---|
237e0016 RS |
1 | /* movemail foo bar -- move file foo to file bar, |
2 | locking file foo the way /bin/mail respects. | |
b3d90e46 GM |
3 | Copyright (C) 1986, 1992, 1993, 1994, 1996, 1999, 2001, 2002, 2003, 2004, |
4 | 2005, 2006, 2007 Free Software Foundation, Inc. | |
237e0016 RS |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
93320c23 JA |
8 | GNU Emacs is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
4a9f99bd | 10 | the Free Software Foundation; either version 3, or (at your option) |
93320c23 JA |
11 | any later version. |
12 | ||
237e0016 | 13 | GNU Emacs is distributed in the hope that it will be useful, |
93320c23 JA |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
237e0016 | 17 | |
93320c23 JA |
18 | You should have received a copy of the GNU General Public License |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
237e0016 | 22 | |
63cf923d RS |
23 | /* Important notice: defining MAIL_USE_FLOCK or MAIL_USE_LOCKF *will |
24 | cause loss of mail* if you do it on a system that does not normally | |
25 | use flock as its way of interlocking access to inbox files. The | |
26 | setting of MAIL_USE_FLOCK and MAIL_USE_LOCKF *must agree* with the | |
27 | system's own conventions. It is not a choice that is up to you. | |
08d0752f RS |
28 | |
29 | So, if your system uses lock files rather than flock, then the only way | |
30 | you can get proper operation is to enable movemail to write lockfiles there. | |
31 | This means you must either give that directory access modes | |
32 | that permit everyone to write lockfiles in it, or you must make movemail | |
33 | a setuid or setgid program. */ | |
34 | ||
237e0016 RS |
35 | /* |
36 | * Modified January, 1986 by Michael R. Gretzinger (Project Athena) | |
37 | * | |
88c40feb | 38 | * Added POP (Post Office Protocol) service. When compiled -DMAIL_USE_POP |
237e0016 RS |
39 | * movemail will accept input filename arguments of the form |
40 | * "po:username". This will cause movemail to open a connection to | |
41 | * a pop server running on $MAILHOST (environment variable). Movemail | |
42 | * must be setuid to root in order to work with POP. | |
177c0ea7 | 43 | * |
237e0016 RS |
44 | * New module: popmail.c |
45 | * Modified routines: | |
cfa191ff | 46 | * main - added code within #ifdef MAIL_USE_POP; added setuid (getuid ()) |
177c0ea7 | 47 | * after POP code. |
237e0016 RS |
48 | * New routines in movemail.c: |
49 | * get_errmsg - return pointer to system error message | |
50 | * | |
2e82e3c3 RS |
51 | * Modified August, 1993 by Jonathan Kamens (OpenVision Technologies) |
52 | * | |
53 | * Move all of the POP code into a separate file, "pop.c". | |
54 | * Use strerror instead of get_errmsg. | |
55 | * | |
237e0016 RS |
56 | */ |
57 | ||
3b9ee819 | 58 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ |
752fb472 | 59 | #include <config.h> |
237e0016 RS |
60 | #include <sys/types.h> |
61 | #include <sys/stat.h> | |
62 | #include <sys/file.h> | |
e2f9d9af | 63 | #include <stdio.h> |
237e0016 | 64 | #include <errno.h> |
cc3b64e8 | 65 | |
fea4325c | 66 | #include <getopt.h> |
f72adc12 EZ |
67 | #ifdef HAVE_UNISTD_H |
68 | #include <unistd.h> | |
69 | #endif | |
cc3b64e8 DL |
70 | #ifdef HAVE_FCNTL_H |
71 | #include <fcntl.h> | |
72 | #endif | |
f72adc12 | 73 | #include "syswait.h" |
2e82e3c3 RS |
74 | #ifdef MAIL_USE_POP |
75 | #include "pop.h" | |
76 | #endif | |
237e0016 | 77 | |
91cf09ac RS |
78 | #ifdef MSDOS |
79 | #undef access | |
80 | #endif /* MSDOS */ | |
81 | ||
61946d67 RS |
82 | #ifndef DIRECTORY_SEP |
83 | #define DIRECTORY_SEP '/' | |
84 | #endif | |
85 | #ifndef IS_DIRECTORY_SEP | |
86 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
87 | #endif | |
88 | ||
7f75d5c6 | 89 | #ifdef WINDOWSNT |
677a7bcf | 90 | #include "ntlib.h" |
7f75d5c6 RS |
91 | #undef access |
92 | #undef unlink | |
93 | #define fork() 0 | |
4822b2e5 | 94 | #define wait(var) (*(var) = 0) |
7f75d5c6 RS |
95 | /* Unfortunately, Samba doesn't seem to properly lock Unix files even |
96 | though the locking call succeeds (and indeed blocks local access from | |
97 | other NT programs). If you have direct file access using an NFS | |
98 | client or something other than Samba, the locking call might work | |
677a7bcf RS |
99 | properly - make sure it does before you enable this! |
100 | ||
101 | [18-Feb-97 andrewi] I now believe my comment above to be incorrect, | |
102 | since it was based on a misunderstanding of how locking calls are | |
103 | implemented and used on Unix. */ | |
104 | //#define DISABLE_DIRECT_ACCESS | |
105 | ||
677a7bcf | 106 | #include <fcntl.h> |
7f75d5c6 RS |
107 | #endif /* WINDOWSNT */ |
108 | ||
4ec9a77a RS |
109 | #ifndef F_OK |
110 | #define F_OK 0 | |
111 | #define X_OK 1 | |
112 | #define W_OK 2 | |
113 | #define R_OK 4 | |
114 | #endif | |
237e0016 | 115 | |
7f75d5c6 | 116 | #if defined (XENIX) || defined (WINDOWSNT) |
237e0016 RS |
117 | #include <sys/locking.h> |
118 | #endif | |
119 | ||
63cf923d RS |
120 | #ifdef MAIL_USE_LOCKF |
121 | #define MAIL_USE_SYSTEM_LOCK | |
122 | #endif | |
123 | ||
124 | #ifdef MAIL_USE_FLOCK | |
125 | #define MAIL_USE_SYSTEM_LOCK | |
126 | #endif | |
127 | ||
4293ba7f RS |
128 | #ifdef MAIL_USE_MMDF |
129 | extern int lk_open (), lk_close (); | |
130 | #endif | |
131 | ||
a4deff3c | 132 | #if !defined (MAIL_USE_SYSTEM_LOCK) && !defined (MAIL_USE_MMDF) && \ |
dd843b6a DL |
133 | (defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) && \ |
134 | defined (HAVE_MAILLOCK_H) | |
a4deff3c RS |
135 | #include <maillock.h> |
136 | /* We can't use maillock unless we know what directory system mail | |
137 | files appear in. */ | |
138 | #ifdef MAILDIR | |
139 | #define MAIL_USE_MAILLOCK | |
140 | static char *mail_spool_name (); | |
141 | #endif | |
142 | #endif | |
143 | ||
e97dd183 | 144 | #ifndef errno |
237e0016 | 145 | extern int errno; |
e97dd183 | 146 | #endif |
e2f9d9af | 147 | char *strerror (); |
517699ca DL |
148 | #ifdef HAVE_INDEX |
149 | extern char *index __P ((const char *, int)); | |
150 | #endif | |
151 | #ifdef HAVE_RINDEX | |
152 | extern char *rindex __P((const char *, int)); | |
153 | #endif | |
e2f9d9af DM |
154 | |
155 | void fatal (); | |
156 | void error (); | |
157 | void pfatal_with_name (); | |
158 | void pfatal_and_delete (); | |
159 | char *concat (); | |
2583d6d7 | 160 | long *xmalloc (); |
e2f9d9af DM |
161 | int popmail (); |
162 | int pop_retr (); | |
163 | int mbx_write (); | |
164 | int mbx_delimit_begin (); | |
165 | int mbx_delimit_end (); | |
237e0016 RS |
166 | |
167 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
168 | char *delete_lockname; | |
169 | ||
e2f9d9af | 170 | int |
237e0016 RS |
171 | main (argc, argv) |
172 | int argc; | |
173 | char **argv; | |
174 | { | |
175 | char *inname, *outname; | |
176 | int indesc, outdesc; | |
237e0016 | 177 | int nread; |
8ca83cfd | 178 | WAITTYPE status; |
fea4325c | 179 | int c, preserve_mail = 0; |
237e0016 | 180 | |
63cf923d | 181 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
182 | struct stat st; |
183 | long now; | |
184 | int tem; | |
185 | char *lockname, *p; | |
906ad89d | 186 | char *tempname; |
237e0016 | 187 | int desc; |
63cf923d | 188 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 189 | |
a4deff3c RS |
190 | #ifdef MAIL_USE_MAILLOCK |
191 | char *spool_name; | |
192 | #endif | |
193 | ||
a2997b0f KH |
194 | #ifdef MAIL_USE_POP |
195 | int pop_reverse_order = 0; | |
196 | # define ARGSTR "pr" | |
197 | #else /* ! MAIL_USE_POP */ | |
198 | # define ARGSTR "p" | |
199 | #endif /* MAIL_USE_POP */ | |
200 | ||
9112a2a9 AI |
201 | #ifdef WINDOWSNT |
202 | /* Ensure all file i/o is in binary mode. */ | |
203 | _fmode = _O_BINARY; | |
204 | #endif | |
205 | ||
237e0016 RS |
206 | delete_lockname = 0; |
207 | ||
a2997b0f | 208 | while ((c = getopt (argc, argv, ARGSTR)) != EOF) |
e2f9d9af | 209 | { |
fea4325c | 210 | switch (c) { |
a2997b0f KH |
211 | #ifdef MAIL_USE_POP |
212 | case 'r': | |
213 | pop_reverse_order = 1; | |
214 | break; | |
215 | #endif | |
fea4325c RS |
216 | case 'p': |
217 | preserve_mail++; | |
218 | break; | |
219 | default: | |
65396510 | 220 | exit (EXIT_FAILURE); |
fea4325c RS |
221 | } |
222 | } | |
223 | ||
224 | if ( | |
225 | #ifdef MAIL_USE_POP | |
226 | (argc - optind < 2) || (argc - optind > 3) | |
227 | #else | |
228 | (argc - optind != 2) | |
229 | #endif | |
230 | ) | |
231 | { | |
fea4325c | 232 | #ifdef MAIL_USE_POP |
bb5618fe JB |
233 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", |
234 | " [POP-password]"); | |
fea4325c | 235 | #else |
bb5618fe | 236 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", ""); |
fea4325c | 237 | #endif |
65396510 | 238 | exit (EXIT_FAILURE); |
e2f9d9af | 239 | } |
237e0016 | 240 | |
fea4325c RS |
241 | inname = argv[optind]; |
242 | outname = argv[optind+1]; | |
237e0016 | 243 | |
4293ba7f RS |
244 | #ifdef MAIL_USE_MMDF |
245 | mmdf_init (argv[0]); | |
246 | #endif | |
247 | ||
af7bd34e | 248 | if (*outname == 0) |
a9eedf40 | 249 | fatal ("Destination file name is empty", 0, 0); |
af7bd34e | 250 | |
b1ce62a8 | 251 | /* Check access to output file. */ |
237e0016 RS |
252 | if (access (outname, F_OK) == 0 && access (outname, W_OK) != 0) |
253 | pfatal_with_name (outname); | |
254 | ||
8e6208c5 | 255 | /* Also check that outname's directory is writable to the real uid. */ |
237e0016 | 256 | { |
91cf09ac | 257 | char *buf = (char *) xmalloc (strlen (outname) + 1); |
e2f9d9af | 258 | char *p; |
237e0016 RS |
259 | strcpy (buf, outname); |
260 | p = buf + strlen (buf); | |
7f75d5c6 | 261 | while (p > buf && !IS_DIRECTORY_SEP (p[-1])) |
237e0016 RS |
262 | *--p = 0; |
263 | if (p == buf) | |
264 | *p++ = '.'; | |
265 | if (access (buf, W_OK) != 0) | |
266 | pfatal_with_name (buf); | |
267 | free (buf); | |
268 | } | |
269 | ||
270 | #ifdef MAIL_USE_POP | |
12a0565a | 271 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 272 | { |
b3112191 | 273 | int status; |
237e0016 | 274 | |
fea4325c | 275 | status = popmail (inname + 3, outname, preserve_mail, |
a2997b0f KH |
276 | (argc - optind == 3) ? argv[optind+2] : NULL, |
277 | pop_reverse_order); | |
237e0016 RS |
278 | exit (status); |
279 | } | |
280 | ||
cfa191ff | 281 | setuid (getuid ()); |
237e0016 RS |
282 | #endif /* MAIL_USE_POP */ |
283 | ||
7f75d5c6 RS |
284 | #ifndef DISABLE_DIRECT_ACCESS |
285 | ||
b1ce62a8 RS |
286 | /* Check access to input file. */ |
287 | if (access (inname, R_OK | W_OK) != 0) | |
288 | pfatal_with_name (inname); | |
289 | ||
4293ba7f | 290 | #ifndef MAIL_USE_MMDF |
63cf923d | 291 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
292 | #ifdef MAIL_USE_MAILLOCK |
293 | spool_name = mail_spool_name (inname); | |
294 | if (! spool_name) | |
295 | #endif | |
237e0016 | 296 | { |
a4deff3c RS |
297 | /* Use a lock file named after our first argument with .lock appended: |
298 | If it exists, the mail file is locked. */ | |
299 | /* Note: this locking mechanism is *required* by the mailer | |
300 | (on systems which use it) to prevent loss of mail. | |
301 | ||
302 | On systems that use a lock file, extracting the mail without locking | |
303 | WILL occasionally cause loss of mail due to timing errors! | |
304 | ||
305 | So, if creation of the lock file fails | |
306 | due to access permission on the mail spool directory, | |
307 | you simply MUST change the permission | |
308 | and/or make movemail a setgid program | |
309 | so it can create lock files properly. | |
310 | ||
311 | You might also wish to verify that your system is one | |
312 | which uses lock files for this purpose. Some systems use other methods. | |
313 | ||
314 | If your system uses the `flock' system call for mail locking, | |
315 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
316 | and recompile movemail. If the s- file for your system | |
317 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
318 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
319 | ||
320 | lockname = concat (inname, ".lock", ""); | |
321 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
322 | strcpy (tempname, inname); | |
323 | p = tempname + strlen (tempname); | |
324 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
325 | p--; | |
326 | *p = 0; | |
327 | strcpy (p, "EXXXXXX"); | |
328 | mktemp (tempname); | |
cfa191ff | 329 | unlink (tempname); |
237e0016 | 330 | |
a4deff3c | 331 | while (1) |
237e0016 | 332 | { |
a4deff3c RS |
333 | /* Create the lock file, but not under the lock file name. */ |
334 | /* Give up if cannot do that. */ | |
335 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
336 | if (desc < 0) | |
337 | { | |
338 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
4b265472 | 339 | sprintf (message, "creating %s, which would become the lock file", |
a4deff3c RS |
340 | tempname); |
341 | pfatal_with_name (message); | |
342 | } | |
343 | close (desc); | |
344 | ||
345 | tem = link (tempname, lockname); | |
346 | unlink (tempname); | |
347 | if (tem >= 0) | |
348 | break; | |
349 | sleep (1); | |
350 | ||
351 | /* If lock file is five minutes old, unlock it. | |
352 | Five minutes should be good enough to cope with crashes | |
353 | and wedgitude, and long enough to avoid being fooled | |
354 | by time differences between machines. */ | |
355 | if (stat (lockname, &st) >= 0) | |
356 | { | |
357 | now = time (0); | |
358 | if (st.st_ctime < now - 300) | |
359 | unlink (lockname); | |
360 | } | |
237e0016 | 361 | } |
237e0016 | 362 | |
a4deff3c RS |
363 | delete_lockname = lockname; |
364 | } | |
63cf923d RS |
365 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
366 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 367 | |
8ca83cfd RS |
368 | if (fork () == 0) |
369 | { | |
25025815 | 370 | int lockcount = 0; |
a4deff3c RS |
371 | int status = 0; |
372 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
373 | long touched_lock, now; | |
374 | #endif | |
25025815 | 375 | |
d5216c20 | 376 | setuid (getuid ()); |
8ca83cfd | 377 | |
63cf923d RS |
378 | #ifndef MAIL_USE_MMDF |
379 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 380 | indesc = open (inname, O_RDWR); |
63cf923d | 381 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 382 | indesc = open (inname, O_RDONLY); |
63cf923d | 383 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
384 | #else /* MAIL_USE_MMDF */ |
385 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
386 | #endif /* MAIL_USE_MMDF */ |
387 | ||
8ca83cfd RS |
388 | if (indesc < 0) |
389 | pfatal_with_name (inname); | |
237e0016 | 390 | |
e397a017 | 391 | #if defined (BSD_SYSTEM) || defined (XENIX) |
8ca83cfd RS |
392 | /* In case movemail is setuid to root, make sure the user can |
393 | read the output file. */ | |
394 | /* This is desirable for all systems | |
395 | but I don't want to assume all have the umask system call */ | |
396 | umask (umask (0) & 0333); | |
e397a017 | 397 | #endif /* BSD_SYSTEM || XENIX */ |
8ca83cfd RS |
398 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
399 | if (outdesc < 0) | |
400 | pfatal_with_name (outname); | |
25025815 RS |
401 | |
402 | /* This label exists so we can retry locking | |
403 | after a delay, if it got EAGAIN or EBUSY. */ | |
404 | retry_lock: | |
405 | ||
406 | /* Try to lock it. */ | |
a4deff3c RS |
407 | #ifdef MAIL_USE_MAILLOCK |
408 | if (spool_name) | |
409 | { | |
410 | /* The "0 - " is to make it a negative number if maillock returns | |
411 | non-zero. */ | |
412 | status = 0 - maillock (spool_name, 1); | |
413 | #ifdef HAVE_TOUCHLOCK | |
414 | touched_lock = time (0); | |
415 | #endif | |
416 | lockcount = 5; | |
417 | } | |
418 | else | |
419 | #endif /* MAIL_USE_MAILLOCK */ | |
420 | { | |
63cf923d RS |
421 | #ifdef MAIL_USE_SYSTEM_LOCK |
422 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 423 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 424 | #else /* not MAIL_USE_LOCKF */ |
237e0016 | 425 | #ifdef XENIX |
a4deff3c | 426 | status = locking (indesc, LK_RLCK, 0L); |
7f75d5c6 RS |
427 | #else |
428 | #ifdef WINDOWSNT | |
a4deff3c | 429 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 430 | #else |
a4deff3c | 431 | status = flock (indesc, LOCK_EX); |
237e0016 | 432 | #endif |
7f75d5c6 | 433 | #endif |
63cf923d RS |
434 | #endif /* not MAIL_USE_LOCKF */ |
435 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 436 | } |
237e0016 | 437 | |
25025815 RS |
438 | /* If it fails, retry up to 5 times |
439 | for certain failure codes. */ | |
440 | if (status < 0) | |
441 | { | |
442 | if (++lockcount <= 5) | |
443 | { | |
444 | #ifdef EAGAIN | |
445 | if (errno == EAGAIN) | |
446 | { | |
447 | sleep (1); | |
448 | goto retry_lock; | |
449 | } | |
450 | #endif | |
451 | #ifdef EBUSY | |
452 | if (errno == EBUSY) | |
453 | { | |
454 | sleep (1); | |
455 | goto retry_lock; | |
456 | } | |
457 | #endif | |
458 | } | |
459 | ||
460 | pfatal_with_name (inname); | |
461 | } | |
177c0ea7 | 462 | |
08564963 | 463 | { |
8ca83cfd RS |
464 | char buf[1024]; |
465 | ||
466 | while (1) | |
08564963 | 467 | { |
8ca83cfd | 468 | nread = read (indesc, buf, sizeof buf); |
5e5b35c7 RS |
469 | if (nread < 0) |
470 | pfatal_with_name (inname); | |
8ca83cfd RS |
471 | if (nread != write (outdesc, buf, nread)) |
472 | { | |
473 | int saved_errno = errno; | |
474 | unlink (outname); | |
475 | errno = saved_errno; | |
476 | pfatal_with_name (outname); | |
477 | } | |
478 | if (nread < sizeof buf) | |
479 | break; | |
a4deff3c RS |
480 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
481 | if (spool_name) | |
482 | { | |
483 | now = time (0); | |
484 | if (now - touched_lock > 60) | |
485 | { | |
486 | touchlock (); | |
487 | touched_lock = now; | |
488 | } | |
489 | } | |
490 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 491 | } |
08564963 | 492 | } |
237e0016 | 493 | |
e397a017 | 494 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
495 | if (fsync (outdesc) < 0) |
496 | pfatal_and_delete (outname); | |
237e0016 RS |
497 | #endif |
498 | ||
8ca83cfd RS |
499 | /* Check to make sure no errors before we zap the inbox. */ |
500 | if (close (outdesc) != 0) | |
501 | pfatal_and_delete (outname); | |
237e0016 | 502 | |
63cf923d | 503 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
504 | if (! preserve_mail) |
505 | { | |
3288d108 | 506 | #if defined (STRIDE) || defined (XENIX) |
fea4325c RS |
507 | /* Stride, xenix have file locking, but no ftruncate. |
508 | This mess will do. */ | |
509 | close (open (inname, O_CREAT | O_TRUNC | O_RDWR, 0666)); | |
237e0016 | 510 | #else |
fea4325c | 511 | ftruncate (indesc, 0L); |
237e0016 | 512 | #endif /* STRIDE or XENIX */ |
b1cb2966 | 513 | } |
63cf923d | 514 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
515 | |
516 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 517 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 518 | #else |
8ca83cfd | 519 | close (indesc); |
4293ba7f | 520 | #endif |
237e0016 | 521 | |
63cf923d | 522 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
523 | if (! preserve_mail) |
524 | { | |
525 | /* Delete the input file; if we can't, at least get rid of its | |
526 | contents. */ | |
e97dd183 | 527 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
528 | /* This is generally bad to do, because it destroys the permissions |
529 | that were set on the file. Better to just empty the file. */ | |
530 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 531 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
532 | creat (inname, 0600); |
533 | } | |
63cf923d | 534 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 535 | |
a4deff3c RS |
536 | #ifdef MAIL_USE_MAILLOCK |
537 | /* This has to occur in the child, i.e., in the process that | |
538 | acquired the lock! */ | |
539 | if (spool_name) | |
540 | mailunlock (); | |
541 | #endif | |
65396510 | 542 | exit (EXIT_SUCCESS); |
8ca83cfd RS |
543 | } |
544 | ||
545 | wait (&status); | |
546 | if (!WIFEXITED (status)) | |
65396510 | 547 | exit (EXIT_FAILURE); |
8ca83cfd RS |
548 | else if (WRETCODE (status) != 0) |
549 | exit (WRETCODE (status)); | |
550 | ||
63cf923d | 551 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
552 | #ifdef MAIL_USE_MAILLOCK |
553 | if (! spool_name) | |
554 | #endif /* MAIL_USE_MAILLOCK */ | |
555 | unlink (lockname); | |
63cf923d | 556 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
557 | |
558 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
559 | ||
65396510 | 560 | return EXIT_SUCCESS; |
237e0016 | 561 | } |
a4deff3c RS |
562 | |
563 | #ifdef MAIL_USE_MAILLOCK | |
564 | /* This function uses stat to confirm that the mail directory is | |
565 | identical to the directory of the input file, rather than just | |
566 | string-comparing the two paths, because one or both of them might | |
567 | be symbolic links pointing to some other directory. */ | |
568 | static char * | |
569 | mail_spool_name (inname) | |
570 | char *inname; | |
571 | { | |
572 | struct stat stat1, stat2; | |
573 | char *indir, *fname; | |
574 | int status; | |
575 | ||
576 | if (! (fname = rindex (inname, '/'))) | |
577 | return NULL; | |
578 | ||
579 | fname++; | |
580 | ||
581 | if (stat (MAILDIR, &stat1) < 0) | |
582 | return NULL; | |
583 | ||
584 | indir = (char *) xmalloc (fname - inname + 1); | |
585 | strncpy (indir, inname, fname - inname); | |
586 | indir[fname-inname] = '\0'; | |
587 | ||
588 | ||
589 | status = stat (indir, &stat2); | |
590 | ||
591 | free (indir); | |
592 | ||
593 | if (status < 0) | |
594 | return NULL; | |
595 | ||
c4009c1f RS |
596 | if (stat1.st_dev == stat2.st_dev |
597 | && stat1.st_ino == stat2.st_ino) | |
a4deff3c RS |
598 | return fname; |
599 | ||
600 | return NULL; | |
601 | } | |
602 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
603 | \f |
604 | /* Print error message and exit. */ | |
605 | ||
e2f9d9af | 606 | void |
a9eedf40 AS |
607 | fatal (s1, s2, s3) |
608 | char *s1, *s2, *s3; | |
237e0016 RS |
609 | { |
610 | if (delete_lockname) | |
611 | unlink (delete_lockname); | |
a9eedf40 | 612 | error (s1, s2, s3); |
65396510 | 613 | exit (EXIT_FAILURE); |
237e0016 RS |
614 | } |
615 | ||
cc3b64e8 DL |
616 | /* Print error message. `s1' is printf control string, `s2' and `s3' |
617 | are args for it or null. */ | |
237e0016 | 618 | |
e2f9d9af | 619 | void |
b1ce62a8 RS |
620 | error (s1, s2, s3) |
621 | char *s1, *s2, *s3; | |
237e0016 | 622 | { |
e2f9d9af | 623 | fprintf (stderr, "movemail: "); |
cc3b64e8 DL |
624 | if (s3) |
625 | fprintf (stderr, s1, s2, s3); | |
626 | else if (s2) | |
627 | fprintf (stderr, s1, s2); | |
628 | else | |
629 | fprintf (stderr, s1); | |
e2f9d9af | 630 | fprintf (stderr, "\n"); |
237e0016 RS |
631 | } |
632 | ||
e2f9d9af | 633 | void |
237e0016 RS |
634 | pfatal_with_name (name) |
635 | char *name; | |
636 | { | |
a9eedf40 | 637 | fatal ("%s for %s", strerror (errno), name); |
237e0016 RS |
638 | } |
639 | ||
e2f9d9af | 640 | void |
cfa191ff RS |
641 | pfatal_and_delete (name) |
642 | char *name; | |
643 | { | |
a9eedf40 | 644 | char *s = strerror (errno); |
cfa191ff | 645 | unlink (name); |
a9eedf40 | 646 | fatal ("%s for %s", s, name); |
cfa191ff RS |
647 | } |
648 | ||
237e0016 RS |
649 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
650 | ||
651 | char * | |
652 | concat (s1, s2, s3) | |
653 | char *s1, *s2, *s3; | |
654 | { | |
655 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
656 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
657 | ||
658 | strcpy (result, s1); | |
659 | strcpy (result + len1, s2); | |
660 | strcpy (result + len1 + len2, s3); | |
661 | *(result + len1 + len2 + len3) = 0; | |
662 | ||
663 | return result; | |
664 | } | |
665 | ||
666 | /* Like malloc but get fatal error if memory is exhausted. */ | |
667 | ||
2583d6d7 | 668 | long * |
237e0016 | 669 | xmalloc (size) |
e97dd183 | 670 | unsigned size; |
237e0016 | 671 | { |
2583d6d7 | 672 | long *result = (long *) malloc (size); |
237e0016 | 673 | if (!result) |
a9eedf40 | 674 | fatal ("virtual memory exhausted", 0, 0); |
237e0016 RS |
675 | return result; |
676 | } | |
677 | \f | |
678 | /* This is the guts of the interface to the Post Office Protocol. */ | |
679 | ||
680 | #ifdef MAIL_USE_POP | |
681 | ||
7f75d5c6 | 682 | #ifndef WINDOWSNT |
237e0016 RS |
683 | #include <sys/socket.h> |
684 | #include <netinet/in.h> | |
685 | #include <netdb.h> | |
7f75d5c6 RS |
686 | #else |
687 | #undef _WINSOCKAPI_ | |
688 | #include <winsock.h> | |
689 | #endif | |
cecf0f21 | 690 | #include <pwd.h> |
237e0016 | 691 | |
237e0016 RS |
692 | #define NOTOK (-1) |
693 | #define OK 0 | |
694 | #define DONE 1 | |
695 | ||
696 | char *progname; | |
697 | FILE *sfi; | |
698 | FILE *sfo; | |
2e82e3c3 RS |
699 | char ibuffer[BUFSIZ]; |
700 | char obuffer[BUFSIZ]; | |
752fb472 DL |
701 | char Errmsg[200]; /* POP errors, at least, can exceed |
702 | the original length of 80. */ | |
237e0016 | 703 | |
476b2799 GM |
704 | /* |
705 | * The full legal syntax for a POP mailbox specification for movemail | |
706 | * is "po:username:hostname". The ":hostname" is optional; if it is | |
707 | * omitted, the MAILHOST environment variable will be consulted. Note | |
708 | * that by the time popmail() is called the "po:" has been stripped | |
709 | * off of the front of the mailbox name. | |
710 | * | |
711 | * If the mailbox is in the form "po:username:hostname", then it is | |
712 | * modified by this function -- the second colon is replaced by a | |
713 | * null. | |
65396510 TTN |
714 | * |
715 | * Return a value suitable for passing to `exit'. | |
476b2799 GM |
716 | */ |
717 | ||
cc3b64e8 | 718 | int |
476b2799 GM |
719 | popmail (mailbox, outfile, preserve, password, reverse_order) |
720 | char *mailbox; | |
b1ce62a8 | 721 | char *outfile; |
fea4325c | 722 | int preserve; |
7f75d5c6 | 723 | char *password; |
a2997b0f | 724 | int reverse_order; |
237e0016 | 725 | { |
b1ce62a8 | 726 | int nmsgs, nbytes; |
b1ce62a8 RS |
727 | register int i; |
728 | int mbfi; | |
729 | FILE *mbf; | |
2e82e3c3 | 730 | char *getenv (); |
b32701a7 | 731 | popserver server; |
a2997b0f | 732 | int start, end, increment; |
476b2799 GM |
733 | char *user, *hostname; |
734 | ||
735 | user = mailbox; | |
736 | if ((hostname = index(mailbox, ':'))) | |
737 | *hostname++ = '\0'; | |
237e0016 | 738 | |
476b2799 | 739 | server = pop_open (hostname, user, password, POP_NO_GETPASS); |
2e82e3c3 | 740 | if (! server) |
b1ce62a8 | 741 | { |
cc3b64e8 | 742 | error ("Error connecting to POP server: %s", pop_error, 0); |
65396510 | 743 | return EXIT_FAILURE; |
237e0016 RS |
744 | } |
745 | ||
2e82e3c3 | 746 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 747 | { |
cc3b64e8 | 748 | error ("Error getting message count from POP server: %s", pop_error, 0); |
65396510 | 749 | return EXIT_FAILURE; |
237e0016 RS |
750 | } |
751 | ||
b1ce62a8 RS |
752 | if (!nmsgs) |
753 | { | |
2e82e3c3 | 754 | pop_close (server); |
65396510 | 755 | return EXIT_SUCCESS; |
b1ce62a8 RS |
756 | } |
757 | ||
758 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
759 | if (mbfi < 0) | |
760 | { | |
2e82e3c3 RS |
761 | pop_close (server); |
762 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
65396510 | 763 | return EXIT_FAILURE; |
b1ce62a8 RS |
764 | } |
765 | fchown (mbfi, getuid (), -1); | |
766 | ||
7f75d5c6 | 767 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 768 | { |
2e82e3c3 | 769 | pop_close (server); |
cc3b64e8 | 770 | error ("Error in fdopen: %s", strerror (errno), 0); |
2e82e3c3 RS |
771 | close (mbfi); |
772 | unlink (outfile); | |
65396510 | 773 | return EXIT_FAILURE; |
b1ce62a8 RS |
774 | } |
775 | ||
a2997b0f KH |
776 | if (reverse_order) |
777 | { | |
778 | start = nmsgs; | |
779 | end = 1; | |
780 | increment = -1; | |
781 | } | |
782 | else | |
783 | { | |
784 | start = 1; | |
785 | end = nmsgs; | |
786 | increment = 1; | |
787 | } | |
788 | ||
789 | for (i = start; i * increment <= end * increment; i += increment) | |
b1ce62a8 RS |
790 | { |
791 | mbx_delimit_begin (mbf); | |
ff804ff5 | 792 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 793 | { |
17a60964 | 794 | error ("%s", Errmsg, 0); |
b1ce62a8 | 795 | close (mbfi); |
65396510 | 796 | return EXIT_FAILURE; |
237e0016 | 797 | } |
b1ce62a8 RS |
798 | mbx_delimit_end (mbf); |
799 | fflush (mbf); | |
2e82e3c3 RS |
800 | if (ferror (mbf)) |
801 | { | |
cc3b64e8 | 802 | error ("Error in fflush: %s", strerror (errno), 0); |
2e82e3c3 RS |
803 | pop_close (server); |
804 | close (mbfi); | |
65396510 | 805 | return EXIT_FAILURE; |
2e82e3c3 | 806 | } |
237e0016 RS |
807 | } |
808 | ||
2e82e3c3 RS |
809 | /* On AFS, a call to write only modifies the file in the local |
810 | * workstation's AFS cache. The changes are not written to the server | |
811 | * until a call to fsync or close is made. Users with AFS home | |
812 | * directories have lost mail when over quota because these checks were | |
813 | * not made in previous versions of movemail. */ | |
814 | ||
e397a017 | 815 | #ifdef BSD_SYSTEM |
cfa191ff RS |
816 | if (fsync (mbfi) < 0) |
817 | { | |
08fa58c9 | 818 | error ("Error in fsync: %s", strerror (errno), 0); |
65396510 | 819 | return EXIT_FAILURE; |
cfa191ff | 820 | } |
340ff9de | 821 | #endif |
cfa191ff RS |
822 | |
823 | if (close (mbfi) == -1) | |
824 | { | |
cc3b64e8 | 825 | error ("Error in close: %s", strerror (errno), 0); |
65396510 | 826 | return EXIT_FAILURE; |
cfa191ff RS |
827 | } |
828 | ||
fea4325c RS |
829 | if (! preserve) |
830 | for (i = 1; i <= nmsgs; i++) | |
831 | { | |
832 | if (pop_delete (server, i)) | |
833 | { | |
cc3b64e8 | 834 | error ("Error from POP server: %s", pop_error, 0); |
fea4325c | 835 | pop_close (server); |
65396510 | 836 | return EXIT_FAILURE; |
fea4325c RS |
837 | } |
838 | } | |
237e0016 | 839 | |
2e82e3c3 | 840 | if (pop_quit (server)) |
b1ce62a8 | 841 | { |
cc3b64e8 | 842 | error ("Error from POP server: %s", pop_error, 0); |
65396510 | 843 | return EXIT_FAILURE; |
237e0016 | 844 | } |
177c0ea7 | 845 | |
65396510 | 846 | return EXIT_SUCCESS; |
237e0016 RS |
847 | } |
848 | ||
ff804ff5 KH |
849 | int |
850 | pop_retr (server, msgno, arg) | |
b32701a7 | 851 | popserver server; |
b553981f | 852 | int msgno; |
ff804ff5 | 853 | FILE *arg; |
237e0016 | 854 | { |
2e82e3c3 RS |
855 | extern char *strerror (); |
856 | char *line; | |
857 | int ret; | |
237e0016 | 858 | |
2e82e3c3 | 859 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 860 | { |
9b956af2 KH |
861 | char *error = concat ("Error from POP server: ", pop_error, ""); |
862 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 863 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 864 | free(error); |
2e82e3c3 | 865 | return (NOTOK); |
237e0016 RS |
866 | } |
867 | ||
d89d0243 | 868 | while ((ret = pop_retrieve_next (server, &line)) >= 0) |
b1ce62a8 | 869 | { |
2e82e3c3 RS |
870 | if (! line) |
871 | break; | |
872 | ||
d89d0243 | 873 | if (mbx_write (line, ret, arg) != OK) |
b1ce62a8 | 874 | { |
2e82e3c3 RS |
875 | strcpy (Errmsg, strerror (errno)); |
876 | pop_close (server); | |
877 | return (NOTOK); | |
237e0016 RS |
878 | } |
879 | } | |
237e0016 | 880 | |
2e82e3c3 | 881 | if (ret) |
b1ce62a8 | 882 | { |
9b956af2 KH |
883 | char *error = concat ("Error from POP server: ", pop_error, ""); |
884 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 885 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 886 | free(error); |
2e82e3c3 | 887 | return (NOTOK); |
237e0016 RS |
888 | } |
889 | ||
2e82e3c3 | 890 | return (OK); |
237e0016 RS |
891 | } |
892 | ||
2e82e3c3 RS |
893 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
894 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
895 | && (a[1] == 'r') \ | |
896 | && (a[2] == 'o') \ | |
897 | && (a[3] == 'm') \ | |
898 | && (a[4] == ' ')) | |
237e0016 | 899 | |
2e82e3c3 | 900 | int |
d89d0243 | 901 | mbx_write (line, len, mbf) |
b1ce62a8 | 902 | char *line; |
d89d0243 | 903 | int len; |
b1ce62a8 | 904 | FILE *mbf; |
237e0016 | 905 | { |
d04f5031 | 906 | #ifdef MOVEMAIL_QUOTE_POP_FROM_LINES |
2e82e3c3 RS |
907 | if (IS_FROM_LINE (line)) |
908 | { | |
909 | if (fputc ('>', mbf) == EOF) | |
910 | return (NOTOK); | |
911 | } | |
d04f5031 PE |
912 | #endif |
913 | if (line[0] == '\037') | |
914 | { | |
915 | if (fputs ("^_", mbf) == EOF) | |
916 | return (NOTOK); | |
917 | line++; | |
918 | len--; | |
919 | } | |
177c0ea7 | 920 | if (fwrite (line, 1, len, mbf) != len) |
2e82e3c3 RS |
921 | return (NOTOK); |
922 | if (fputc (0x0a, mbf) == EOF) | |
923 | return (NOTOK); | |
924 | return (OK); | |
237e0016 RS |
925 | } |
926 | ||
2e82e3c3 | 927 | int |
b1ce62a8 RS |
928 | mbx_delimit_begin (mbf) |
929 | FILE *mbf; | |
237e0016 | 930 | { |
2e82e3c3 RS |
931 | if (fputs ("\f\n0, unseen,,\n", mbf) == EOF) |
932 | return (NOTOK); | |
933 | return (OK); | |
237e0016 RS |
934 | } |
935 | ||
cc3b64e8 | 936 | int |
b1ce62a8 RS |
937 | mbx_delimit_end (mbf) |
938 | FILE *mbf; | |
237e0016 | 939 | { |
2e82e3c3 RS |
940 | if (putc ('\037', mbf) == EOF) |
941 | return (NOTOK); | |
942 | return (OK); | |
237e0016 RS |
943 | } |
944 | ||
945 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
946 | \f |
947 | #ifndef HAVE_STRERROR | |
948 | char * | |
949 | strerror (errnum) | |
950 | int errnum; | |
951 | { | |
952 | extern char *sys_errlist[]; | |
953 | extern int sys_nerr; | |
954 | ||
955 | if (errnum >= 0 && errnum < sys_nerr) | |
956 | return sys_errlist[errnum]; | |
957 | return (char *) "Unknown error"; | |
958 | } | |
959 | ||
960 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
961 | |
962 | /* arch-tag: 1c323112-41fe-4fe5-8de9-494de631f73f | |
963 | (do not change this comment) */ | |
65396510 TTN |
964 | |
965 | /* movemail.c ends here */ |