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 | 3 | Copyright (C) 1986, 1992, 1993, 1994, 1996, 1999, 2001, 2002, 2003, 2004, |
f5d0ac07 | 4 | 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
237e0016 RS |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
294981c7 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
93320c23 | 9 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
93320c23 | 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 | 18 | You should have received a copy of the GNU General Public License |
294981c7 GM |
19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
20 | ||
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 | ||
752fb472 | 57 | #include <config.h> |
237e0016 RS |
58 | #include <sys/types.h> |
59 | #include <sys/stat.h> | |
60 | #include <sys/file.h> | |
e2f9d9af | 61 | #include <stdio.h> |
237e0016 | 62 | #include <errno.h> |
cc3b64e8 | 63 | |
fea4325c | 64 | #include <getopt.h> |
f72adc12 EZ |
65 | #ifdef HAVE_UNISTD_H |
66 | #include <unistd.h> | |
67 | #endif | |
cc3b64e8 DL |
68 | #ifdef HAVE_FCNTL_H |
69 | #include <fcntl.h> | |
70 | #endif | |
f72adc12 | 71 | #include "syswait.h" |
2e82e3c3 RS |
72 | #ifdef MAIL_USE_POP |
73 | #include "pop.h" | |
74 | #endif | |
237e0016 | 75 | |
91cf09ac RS |
76 | #ifdef MSDOS |
77 | #undef access | |
78 | #endif /* MSDOS */ | |
79 | ||
61946d67 RS |
80 | #ifndef DIRECTORY_SEP |
81 | #define DIRECTORY_SEP '/' | |
82 | #endif | |
83 | #ifndef IS_DIRECTORY_SEP | |
84 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
85 | #endif | |
86 | ||
7f75d5c6 | 87 | #ifdef WINDOWSNT |
677a7bcf | 88 | #include "ntlib.h" |
7f75d5c6 RS |
89 | #undef access |
90 | #undef unlink | |
91 | #define fork() 0 | |
4822b2e5 | 92 | #define wait(var) (*(var) = 0) |
7f75d5c6 RS |
93 | /* Unfortunately, Samba doesn't seem to properly lock Unix files even |
94 | though the locking call succeeds (and indeed blocks local access from | |
95 | other NT programs). If you have direct file access using an NFS | |
96 | client or something other than Samba, the locking call might work | |
677a7bcf RS |
97 | properly - make sure it does before you enable this! |
98 | ||
99 | [18-Feb-97 andrewi] I now believe my comment above to be incorrect, | |
100 | since it was based on a misunderstanding of how locking calls are | |
101 | implemented and used on Unix. */ | |
102 | //#define DISABLE_DIRECT_ACCESS | |
103 | ||
677a7bcf | 104 | #include <fcntl.h> |
7f75d5c6 RS |
105 | #endif /* WINDOWSNT */ |
106 | ||
4ec9a77a RS |
107 | #ifndef F_OK |
108 | #define F_OK 0 | |
109 | #define X_OK 1 | |
110 | #define W_OK 2 | |
111 | #define R_OK 4 | |
112 | #endif | |
237e0016 | 113 | |
76ed5e01 | 114 | #ifdef WINDOWSNT |
237e0016 RS |
115 | #include <sys/locking.h> |
116 | #endif | |
117 | ||
63cf923d RS |
118 | #ifdef MAIL_USE_LOCKF |
119 | #define MAIL_USE_SYSTEM_LOCK | |
120 | #endif | |
121 | ||
122 | #ifdef MAIL_USE_FLOCK | |
123 | #define MAIL_USE_SYSTEM_LOCK | |
124 | #endif | |
125 | ||
4293ba7f RS |
126 | #ifdef MAIL_USE_MMDF |
127 | extern int lk_open (), lk_close (); | |
128 | #endif | |
129 | ||
a4deff3c | 130 | #if !defined (MAIL_USE_SYSTEM_LOCK) && !defined (MAIL_USE_MMDF) && \ |
dd843b6a DL |
131 | (defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) && \ |
132 | defined (HAVE_MAILLOCK_H) | |
a4deff3c RS |
133 | #include <maillock.h> |
134 | /* We can't use maillock unless we know what directory system mail | |
135 | files appear in. */ | |
136 | #ifdef MAILDIR | |
137 | #define MAIL_USE_MAILLOCK | |
138 | static char *mail_spool_name (); | |
139 | #endif | |
140 | #endif | |
141 | ||
e97dd183 | 142 | #ifndef errno |
237e0016 | 143 | extern int errno; |
e97dd183 | 144 | #endif |
e2f9d9af | 145 | char *strerror (); |
517699ca DL |
146 | #ifdef HAVE_INDEX |
147 | extern char *index __P ((const char *, int)); | |
148 | #endif | |
149 | #ifdef HAVE_RINDEX | |
150 | extern char *rindex __P((const char *, int)); | |
151 | #endif | |
e2f9d9af DM |
152 | |
153 | void fatal (); | |
154 | void error (); | |
155 | void pfatal_with_name (); | |
156 | void pfatal_and_delete (); | |
157 | char *concat (); | |
2583d6d7 | 158 | long *xmalloc (); |
e2f9d9af DM |
159 | int popmail (); |
160 | int pop_retr (); | |
161 | int mbx_write (); | |
162 | int mbx_delimit_begin (); | |
163 | int mbx_delimit_end (); | |
237e0016 RS |
164 | |
165 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
166 | char *delete_lockname; | |
167 | ||
e2f9d9af | 168 | int |
237e0016 RS |
169 | main (argc, argv) |
170 | int argc; | |
171 | char **argv; | |
172 | { | |
173 | char *inname, *outname; | |
174 | int indesc, outdesc; | |
237e0016 | 175 | int nread; |
bba104c1 | 176 | int status; |
fea4325c | 177 | int c, preserve_mail = 0; |
237e0016 | 178 | |
63cf923d | 179 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
180 | struct stat st; |
181 | long now; | |
182 | int tem; | |
183 | char *lockname, *p; | |
906ad89d | 184 | char *tempname; |
237e0016 | 185 | int desc; |
63cf923d | 186 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 187 | |
a4deff3c RS |
188 | #ifdef MAIL_USE_MAILLOCK |
189 | char *spool_name; | |
190 | #endif | |
191 | ||
a2997b0f KH |
192 | #ifdef MAIL_USE_POP |
193 | int pop_reverse_order = 0; | |
194 | # define ARGSTR "pr" | |
195 | #else /* ! MAIL_USE_POP */ | |
196 | # define ARGSTR "p" | |
197 | #endif /* MAIL_USE_POP */ | |
198 | ||
9112a2a9 AI |
199 | #ifdef WINDOWSNT |
200 | /* Ensure all file i/o is in binary mode. */ | |
201 | _fmode = _O_BINARY; | |
202 | #endif | |
203 | ||
237e0016 RS |
204 | delete_lockname = 0; |
205 | ||
a2997b0f | 206 | while ((c = getopt (argc, argv, ARGSTR)) != EOF) |
e2f9d9af | 207 | { |
fea4325c | 208 | switch (c) { |
a2997b0f KH |
209 | #ifdef MAIL_USE_POP |
210 | case 'r': | |
211 | pop_reverse_order = 1; | |
212 | break; | |
213 | #endif | |
fea4325c RS |
214 | case 'p': |
215 | preserve_mail++; | |
216 | break; | |
217 | default: | |
65396510 | 218 | exit (EXIT_FAILURE); |
fea4325c RS |
219 | } |
220 | } | |
221 | ||
222 | if ( | |
223 | #ifdef MAIL_USE_POP | |
224 | (argc - optind < 2) || (argc - optind > 3) | |
225 | #else | |
226 | (argc - optind != 2) | |
227 | #endif | |
228 | ) | |
229 | { | |
fea4325c | 230 | #ifdef MAIL_USE_POP |
bb5618fe JB |
231 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", |
232 | " [POP-password]"); | |
fea4325c | 233 | #else |
bb5618fe | 234 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", ""); |
fea4325c | 235 | #endif |
65396510 | 236 | exit (EXIT_FAILURE); |
e2f9d9af | 237 | } |
237e0016 | 238 | |
fea4325c RS |
239 | inname = argv[optind]; |
240 | outname = argv[optind+1]; | |
237e0016 | 241 | |
4293ba7f RS |
242 | #ifdef MAIL_USE_MMDF |
243 | mmdf_init (argv[0]); | |
244 | #endif | |
245 | ||
af7bd34e | 246 | if (*outname == 0) |
a9eedf40 | 247 | fatal ("Destination file name is empty", 0, 0); |
af7bd34e | 248 | |
b1ce62a8 | 249 | /* Check access to output file. */ |
237e0016 RS |
250 | if (access (outname, F_OK) == 0 && access (outname, W_OK) != 0) |
251 | pfatal_with_name (outname); | |
252 | ||
8e6208c5 | 253 | /* Also check that outname's directory is writable to the real uid. */ |
237e0016 | 254 | { |
91cf09ac | 255 | char *buf = (char *) xmalloc (strlen (outname) + 1); |
e2f9d9af | 256 | char *p; |
237e0016 RS |
257 | strcpy (buf, outname); |
258 | p = buf + strlen (buf); | |
7f75d5c6 | 259 | while (p > buf && !IS_DIRECTORY_SEP (p[-1])) |
237e0016 RS |
260 | *--p = 0; |
261 | if (p == buf) | |
262 | *p++ = '.'; | |
263 | if (access (buf, W_OK) != 0) | |
264 | pfatal_with_name (buf); | |
265 | free (buf); | |
266 | } | |
267 | ||
268 | #ifdef MAIL_USE_POP | |
12a0565a | 269 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 270 | { |
b3112191 | 271 | int status; |
237e0016 | 272 | |
fea4325c | 273 | status = popmail (inname + 3, outname, preserve_mail, |
a2997b0f KH |
274 | (argc - optind == 3) ? argv[optind+2] : NULL, |
275 | pop_reverse_order); | |
237e0016 RS |
276 | exit (status); |
277 | } | |
278 | ||
cfa191ff | 279 | setuid (getuid ()); |
237e0016 RS |
280 | #endif /* MAIL_USE_POP */ |
281 | ||
7f75d5c6 RS |
282 | #ifndef DISABLE_DIRECT_ACCESS |
283 | ||
b1ce62a8 RS |
284 | /* Check access to input file. */ |
285 | if (access (inname, R_OK | W_OK) != 0) | |
286 | pfatal_with_name (inname); | |
287 | ||
4293ba7f | 288 | #ifndef MAIL_USE_MMDF |
63cf923d | 289 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
290 | #ifdef MAIL_USE_MAILLOCK |
291 | spool_name = mail_spool_name (inname); | |
292 | if (! spool_name) | |
293 | #endif | |
237e0016 | 294 | { |
a4deff3c RS |
295 | /* Use a lock file named after our first argument with .lock appended: |
296 | If it exists, the mail file is locked. */ | |
297 | /* Note: this locking mechanism is *required* by the mailer | |
298 | (on systems which use it) to prevent loss of mail. | |
299 | ||
300 | On systems that use a lock file, extracting the mail without locking | |
301 | WILL occasionally cause loss of mail due to timing errors! | |
302 | ||
303 | So, if creation of the lock file fails | |
304 | due to access permission on the mail spool directory, | |
305 | you simply MUST change the permission | |
306 | and/or make movemail a setgid program | |
307 | so it can create lock files properly. | |
308 | ||
309 | You might also wish to verify that your system is one | |
310 | which uses lock files for this purpose. Some systems use other methods. | |
311 | ||
312 | If your system uses the `flock' system call for mail locking, | |
313 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
314 | and recompile movemail. If the s- file for your system | |
315 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
316 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
317 | ||
318 | lockname = concat (inname, ".lock", ""); | |
319 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
320 | strcpy (tempname, inname); | |
321 | p = tempname + strlen (tempname); | |
322 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
323 | p--; | |
324 | *p = 0; | |
325 | strcpy (p, "EXXXXXX"); | |
326 | mktemp (tempname); | |
cfa191ff | 327 | unlink (tempname); |
237e0016 | 328 | |
a4deff3c | 329 | while (1) |
237e0016 | 330 | { |
a4deff3c RS |
331 | /* Create the lock file, but not under the lock file name. */ |
332 | /* Give up if cannot do that. */ | |
333 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
334 | if (desc < 0) | |
335 | { | |
336 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
4b265472 | 337 | sprintf (message, "creating %s, which would become the lock file", |
a4deff3c RS |
338 | tempname); |
339 | pfatal_with_name (message); | |
340 | } | |
341 | close (desc); | |
342 | ||
343 | tem = link (tempname, lockname); | |
097e9c90 CY |
344 | |
345 | #ifdef EPERM | |
346 | if (tem < 0 && errno == EPERM) | |
347 | fatal ("Unable to create hard link between %s and %s", | |
348 | tempname, lockname); | |
349 | #endif | |
350 | ||
a4deff3c RS |
351 | unlink (tempname); |
352 | if (tem >= 0) | |
353 | break; | |
354 | sleep (1); | |
355 | ||
356 | /* If lock file is five minutes old, unlock it. | |
357 | Five minutes should be good enough to cope with crashes | |
358 | and wedgitude, and long enough to avoid being fooled | |
359 | by time differences between machines. */ | |
360 | if (stat (lockname, &st) >= 0) | |
361 | { | |
362 | now = time (0); | |
363 | if (st.st_ctime < now - 300) | |
364 | unlink (lockname); | |
365 | } | |
237e0016 | 366 | } |
237e0016 | 367 | |
a4deff3c RS |
368 | delete_lockname = lockname; |
369 | } | |
63cf923d RS |
370 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
371 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 372 | |
8ca83cfd RS |
373 | if (fork () == 0) |
374 | { | |
25025815 | 375 | int lockcount = 0; |
a4deff3c RS |
376 | int status = 0; |
377 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
378 | long touched_lock, now; | |
379 | #endif | |
25025815 | 380 | |
d5216c20 | 381 | setuid (getuid ()); |
8ca83cfd | 382 | |
63cf923d RS |
383 | #ifndef MAIL_USE_MMDF |
384 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 385 | indesc = open (inname, O_RDWR); |
63cf923d | 386 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 387 | indesc = open (inname, O_RDONLY); |
63cf923d | 388 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
389 | #else /* MAIL_USE_MMDF */ |
390 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
391 | #endif /* MAIL_USE_MMDF */ |
392 | ||
8ca83cfd RS |
393 | if (indesc < 0) |
394 | pfatal_with_name (inname); | |
237e0016 | 395 | |
76ed5e01 | 396 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
397 | /* In case movemail is setuid to root, make sure the user can |
398 | read the output file. */ | |
399 | /* This is desirable for all systems | |
400 | but I don't want to assume all have the umask system call */ | |
401 | umask (umask (0) & 0333); | |
76ed5e01 | 402 | #endif /* BSD_SYSTEM */ |
8ca83cfd RS |
403 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
404 | if (outdesc < 0) | |
405 | pfatal_with_name (outname); | |
25025815 RS |
406 | |
407 | /* This label exists so we can retry locking | |
408 | after a delay, if it got EAGAIN or EBUSY. */ | |
409 | retry_lock: | |
410 | ||
411 | /* Try to lock it. */ | |
a4deff3c RS |
412 | #ifdef MAIL_USE_MAILLOCK |
413 | if (spool_name) | |
414 | { | |
415 | /* The "0 - " is to make it a negative number if maillock returns | |
416 | non-zero. */ | |
417 | status = 0 - maillock (spool_name, 1); | |
418 | #ifdef HAVE_TOUCHLOCK | |
419 | touched_lock = time (0); | |
420 | #endif | |
421 | lockcount = 5; | |
422 | } | |
423 | else | |
424 | #endif /* MAIL_USE_MAILLOCK */ | |
425 | { | |
63cf923d RS |
426 | #ifdef MAIL_USE_SYSTEM_LOCK |
427 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 428 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 429 | #else /* not MAIL_USE_LOCKF */ |
7f75d5c6 | 430 | #ifdef WINDOWSNT |
a4deff3c | 431 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 432 | #else |
a4deff3c | 433 | status = flock (indesc, LOCK_EX); |
237e0016 | 434 | #endif |
63cf923d RS |
435 | #endif /* not MAIL_USE_LOCKF */ |
436 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 437 | } |
237e0016 | 438 | |
25025815 RS |
439 | /* If it fails, retry up to 5 times |
440 | for certain failure codes. */ | |
441 | if (status < 0) | |
442 | { | |
443 | if (++lockcount <= 5) | |
444 | { | |
445 | #ifdef EAGAIN | |
446 | if (errno == EAGAIN) | |
447 | { | |
448 | sleep (1); | |
449 | goto retry_lock; | |
450 | } | |
451 | #endif | |
452 | #ifdef EBUSY | |
453 | if (errno == EBUSY) | |
454 | { | |
455 | sleep (1); | |
456 | goto retry_lock; | |
457 | } | |
458 | #endif | |
459 | } | |
460 | ||
461 | pfatal_with_name (inname); | |
462 | } | |
177c0ea7 | 463 | |
08564963 | 464 | { |
8ca83cfd RS |
465 | char buf[1024]; |
466 | ||
467 | while (1) | |
08564963 | 468 | { |
8ca83cfd | 469 | nread = read (indesc, buf, sizeof buf); |
5e5b35c7 RS |
470 | if (nread < 0) |
471 | pfatal_with_name (inname); | |
8ca83cfd RS |
472 | if (nread != write (outdesc, buf, nread)) |
473 | { | |
474 | int saved_errno = errno; | |
475 | unlink (outname); | |
476 | errno = saved_errno; | |
477 | pfatal_with_name (outname); | |
478 | } | |
479 | if (nread < sizeof buf) | |
480 | break; | |
a4deff3c RS |
481 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
482 | if (spool_name) | |
483 | { | |
484 | now = time (0); | |
485 | if (now - touched_lock > 60) | |
486 | { | |
487 | touchlock (); | |
488 | touched_lock = now; | |
489 | } | |
490 | } | |
491 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 492 | } |
08564963 | 493 | } |
237e0016 | 494 | |
e397a017 | 495 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
496 | if (fsync (outdesc) < 0) |
497 | pfatal_and_delete (outname); | |
237e0016 RS |
498 | #endif |
499 | ||
8ca83cfd RS |
500 | /* Check to make sure no errors before we zap the inbox. */ |
501 | if (close (outdesc) != 0) | |
502 | pfatal_and_delete (outname); | |
237e0016 | 503 | |
63cf923d | 504 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
505 | if (! preserve_mail) |
506 | { | |
fea4325c | 507 | ftruncate (indesc, 0L); |
b1cb2966 | 508 | } |
63cf923d | 509 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
510 | |
511 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 512 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 513 | #else |
8ca83cfd | 514 | close (indesc); |
4293ba7f | 515 | #endif |
237e0016 | 516 | |
63cf923d | 517 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
518 | if (! preserve_mail) |
519 | { | |
520 | /* Delete the input file; if we can't, at least get rid of its | |
521 | contents. */ | |
e97dd183 | 522 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
523 | /* This is generally bad to do, because it destroys the permissions |
524 | that were set on the file. Better to just empty the file. */ | |
525 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 526 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
527 | creat (inname, 0600); |
528 | } | |
63cf923d | 529 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 530 | |
a4deff3c RS |
531 | #ifdef MAIL_USE_MAILLOCK |
532 | /* This has to occur in the child, i.e., in the process that | |
533 | acquired the lock! */ | |
534 | if (spool_name) | |
535 | mailunlock (); | |
536 | #endif | |
65396510 | 537 | exit (EXIT_SUCCESS); |
8ca83cfd RS |
538 | } |
539 | ||
540 | wait (&status); | |
541 | if (!WIFEXITED (status)) | |
65396510 | 542 | exit (EXIT_FAILURE); |
8ca83cfd RS |
543 | else if (WRETCODE (status) != 0) |
544 | exit (WRETCODE (status)); | |
545 | ||
63cf923d | 546 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
547 | #ifdef MAIL_USE_MAILLOCK |
548 | if (! spool_name) | |
549 | #endif /* MAIL_USE_MAILLOCK */ | |
550 | unlink (lockname); | |
63cf923d | 551 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
552 | |
553 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
554 | ||
65396510 | 555 | return EXIT_SUCCESS; |
237e0016 | 556 | } |
a4deff3c RS |
557 | |
558 | #ifdef MAIL_USE_MAILLOCK | |
559 | /* This function uses stat to confirm that the mail directory is | |
560 | identical to the directory of the input file, rather than just | |
561 | string-comparing the two paths, because one or both of them might | |
562 | be symbolic links pointing to some other directory. */ | |
563 | static char * | |
564 | mail_spool_name (inname) | |
565 | char *inname; | |
566 | { | |
567 | struct stat stat1, stat2; | |
568 | char *indir, *fname; | |
569 | int status; | |
570 | ||
571 | if (! (fname = rindex (inname, '/'))) | |
572 | return NULL; | |
573 | ||
574 | fname++; | |
575 | ||
576 | if (stat (MAILDIR, &stat1) < 0) | |
577 | return NULL; | |
578 | ||
579 | indir = (char *) xmalloc (fname - inname + 1); | |
580 | strncpy (indir, inname, fname - inname); | |
581 | indir[fname-inname] = '\0'; | |
582 | ||
583 | ||
584 | status = stat (indir, &stat2); | |
585 | ||
586 | free (indir); | |
587 | ||
588 | if (status < 0) | |
589 | return NULL; | |
590 | ||
c4009c1f RS |
591 | if (stat1.st_dev == stat2.st_dev |
592 | && stat1.st_ino == stat2.st_ino) | |
a4deff3c RS |
593 | return fname; |
594 | ||
595 | return NULL; | |
596 | } | |
597 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
598 | \f |
599 | /* Print error message and exit. */ | |
600 | ||
e2f9d9af | 601 | void |
a9eedf40 AS |
602 | fatal (s1, s2, s3) |
603 | char *s1, *s2, *s3; | |
237e0016 RS |
604 | { |
605 | if (delete_lockname) | |
606 | unlink (delete_lockname); | |
a9eedf40 | 607 | error (s1, s2, s3); |
65396510 | 608 | exit (EXIT_FAILURE); |
237e0016 RS |
609 | } |
610 | ||
cc3b64e8 DL |
611 | /* Print error message. `s1' is printf control string, `s2' and `s3' |
612 | are args for it or null. */ | |
237e0016 | 613 | |
e2f9d9af | 614 | void |
b1ce62a8 RS |
615 | error (s1, s2, s3) |
616 | char *s1, *s2, *s3; | |
237e0016 | 617 | { |
e2f9d9af | 618 | fprintf (stderr, "movemail: "); |
cc3b64e8 DL |
619 | if (s3) |
620 | fprintf (stderr, s1, s2, s3); | |
621 | else if (s2) | |
622 | fprintf (stderr, s1, s2); | |
623 | else | |
624 | fprintf (stderr, s1); | |
e2f9d9af | 625 | fprintf (stderr, "\n"); |
237e0016 RS |
626 | } |
627 | ||
e2f9d9af | 628 | void |
237e0016 RS |
629 | pfatal_with_name (name) |
630 | char *name; | |
631 | { | |
a9eedf40 | 632 | fatal ("%s for %s", strerror (errno), name); |
237e0016 RS |
633 | } |
634 | ||
e2f9d9af | 635 | void |
cfa191ff RS |
636 | pfatal_and_delete (name) |
637 | char *name; | |
638 | { | |
a9eedf40 | 639 | char *s = strerror (errno); |
cfa191ff | 640 | unlink (name); |
a9eedf40 | 641 | fatal ("%s for %s", s, name); |
cfa191ff RS |
642 | } |
643 | ||
237e0016 RS |
644 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
645 | ||
646 | char * | |
647 | concat (s1, s2, s3) | |
648 | char *s1, *s2, *s3; | |
649 | { | |
650 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
651 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
652 | ||
653 | strcpy (result, s1); | |
654 | strcpy (result + len1, s2); | |
655 | strcpy (result + len1 + len2, s3); | |
656 | *(result + len1 + len2 + len3) = 0; | |
657 | ||
658 | return result; | |
659 | } | |
660 | ||
661 | /* Like malloc but get fatal error if memory is exhausted. */ | |
662 | ||
2583d6d7 | 663 | long * |
237e0016 | 664 | xmalloc (size) |
e97dd183 | 665 | unsigned size; |
237e0016 | 666 | { |
2583d6d7 | 667 | long *result = (long *) malloc (size); |
237e0016 | 668 | if (!result) |
a9eedf40 | 669 | fatal ("virtual memory exhausted", 0, 0); |
237e0016 RS |
670 | return result; |
671 | } | |
672 | \f | |
673 | /* This is the guts of the interface to the Post Office Protocol. */ | |
674 | ||
675 | #ifdef MAIL_USE_POP | |
676 | ||
7f75d5c6 | 677 | #ifndef WINDOWSNT |
237e0016 RS |
678 | #include <sys/socket.h> |
679 | #include <netinet/in.h> | |
680 | #include <netdb.h> | |
7f75d5c6 RS |
681 | #else |
682 | #undef _WINSOCKAPI_ | |
683 | #include <winsock.h> | |
684 | #endif | |
cecf0f21 | 685 | #include <pwd.h> |
d228a23c GM |
686 | #include <string.h> |
687 | #include <time.h> | |
237e0016 | 688 | |
237e0016 RS |
689 | #define NOTOK (-1) |
690 | #define OK 0 | |
691 | #define DONE 1 | |
692 | ||
693 | char *progname; | |
694 | FILE *sfi; | |
695 | FILE *sfo; | |
2e82e3c3 RS |
696 | char ibuffer[BUFSIZ]; |
697 | char obuffer[BUFSIZ]; | |
752fb472 DL |
698 | char Errmsg[200]; /* POP errors, at least, can exceed |
699 | the original length of 80. */ | |
237e0016 | 700 | |
476b2799 | 701 | /* |
4d90eee4 | 702 | * The full valid syntax for a POP mailbox specification for movemail |
476b2799 GM |
703 | * is "po:username:hostname". The ":hostname" is optional; if it is |
704 | * omitted, the MAILHOST environment variable will be consulted. Note | |
705 | * that by the time popmail() is called the "po:" has been stripped | |
706 | * off of the front of the mailbox name. | |
707 | * | |
708 | * If the mailbox is in the form "po:username:hostname", then it is | |
709 | * modified by this function -- the second colon is replaced by a | |
710 | * null. | |
65396510 TTN |
711 | * |
712 | * Return a value suitable for passing to `exit'. | |
476b2799 GM |
713 | */ |
714 | ||
cc3b64e8 | 715 | int |
476b2799 GM |
716 | popmail (mailbox, outfile, preserve, password, reverse_order) |
717 | char *mailbox; | |
b1ce62a8 | 718 | char *outfile; |
fea4325c | 719 | int preserve; |
7f75d5c6 | 720 | char *password; |
a2997b0f | 721 | int reverse_order; |
237e0016 | 722 | { |
b1ce62a8 | 723 | int nmsgs, nbytes; |
b1ce62a8 RS |
724 | register int i; |
725 | int mbfi; | |
726 | FILE *mbf; | |
2e82e3c3 | 727 | char *getenv (); |
b32701a7 | 728 | popserver server; |
a2997b0f | 729 | int start, end, increment; |
476b2799 GM |
730 | char *user, *hostname; |
731 | ||
732 | user = mailbox; | |
733 | if ((hostname = index(mailbox, ':'))) | |
734 | *hostname++ = '\0'; | |
237e0016 | 735 | |
476b2799 | 736 | server = pop_open (hostname, user, password, POP_NO_GETPASS); |
2e82e3c3 | 737 | if (! server) |
b1ce62a8 | 738 | { |
cc3b64e8 | 739 | error ("Error connecting to POP server: %s", pop_error, 0); |
65396510 | 740 | return EXIT_FAILURE; |
237e0016 RS |
741 | } |
742 | ||
2e82e3c3 | 743 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 744 | { |
cc3b64e8 | 745 | error ("Error getting message count from POP server: %s", pop_error, 0); |
65396510 | 746 | return EXIT_FAILURE; |
237e0016 RS |
747 | } |
748 | ||
b1ce62a8 RS |
749 | if (!nmsgs) |
750 | { | |
2e82e3c3 | 751 | pop_close (server); |
65396510 | 752 | return EXIT_SUCCESS; |
b1ce62a8 RS |
753 | } |
754 | ||
755 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
756 | if (mbfi < 0) | |
757 | { | |
2e82e3c3 RS |
758 | pop_close (server); |
759 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
65396510 | 760 | return EXIT_FAILURE; |
b1ce62a8 RS |
761 | } |
762 | fchown (mbfi, getuid (), -1); | |
763 | ||
7f75d5c6 | 764 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 765 | { |
2e82e3c3 | 766 | pop_close (server); |
cc3b64e8 | 767 | error ("Error in fdopen: %s", strerror (errno), 0); |
2e82e3c3 RS |
768 | close (mbfi); |
769 | unlink (outfile); | |
65396510 | 770 | return EXIT_FAILURE; |
b1ce62a8 RS |
771 | } |
772 | ||
a2997b0f KH |
773 | if (reverse_order) |
774 | { | |
775 | start = nmsgs; | |
776 | end = 1; | |
777 | increment = -1; | |
778 | } | |
779 | else | |
780 | { | |
781 | start = 1; | |
782 | end = nmsgs; | |
783 | increment = 1; | |
784 | } | |
785 | ||
786 | for (i = start; i * increment <= end * increment; i += increment) | |
b1ce62a8 RS |
787 | { |
788 | mbx_delimit_begin (mbf); | |
ff804ff5 | 789 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 790 | { |
17a60964 | 791 | error ("%s", Errmsg, 0); |
b1ce62a8 | 792 | close (mbfi); |
65396510 | 793 | return EXIT_FAILURE; |
237e0016 | 794 | } |
b1ce62a8 RS |
795 | mbx_delimit_end (mbf); |
796 | fflush (mbf); | |
2e82e3c3 RS |
797 | if (ferror (mbf)) |
798 | { | |
cc3b64e8 | 799 | error ("Error in fflush: %s", strerror (errno), 0); |
2e82e3c3 RS |
800 | pop_close (server); |
801 | close (mbfi); | |
65396510 | 802 | return EXIT_FAILURE; |
2e82e3c3 | 803 | } |
237e0016 RS |
804 | } |
805 | ||
2e82e3c3 RS |
806 | /* On AFS, a call to write only modifies the file in the local |
807 | * workstation's AFS cache. The changes are not written to the server | |
808 | * until a call to fsync or close is made. Users with AFS home | |
809 | * directories have lost mail when over quota because these checks were | |
810 | * not made in previous versions of movemail. */ | |
811 | ||
e397a017 | 812 | #ifdef BSD_SYSTEM |
cfa191ff RS |
813 | if (fsync (mbfi) < 0) |
814 | { | |
08fa58c9 | 815 | error ("Error in fsync: %s", strerror (errno), 0); |
65396510 | 816 | return EXIT_FAILURE; |
cfa191ff | 817 | } |
340ff9de | 818 | #endif |
cfa191ff RS |
819 | |
820 | if (close (mbfi) == -1) | |
821 | { | |
cc3b64e8 | 822 | error ("Error in close: %s", strerror (errno), 0); |
65396510 | 823 | return EXIT_FAILURE; |
cfa191ff RS |
824 | } |
825 | ||
fea4325c RS |
826 | if (! preserve) |
827 | for (i = 1; i <= nmsgs; i++) | |
828 | { | |
829 | if (pop_delete (server, i)) | |
830 | { | |
cc3b64e8 | 831 | error ("Error from POP server: %s", pop_error, 0); |
fea4325c | 832 | pop_close (server); |
65396510 | 833 | return EXIT_FAILURE; |
fea4325c RS |
834 | } |
835 | } | |
237e0016 | 836 | |
2e82e3c3 | 837 | if (pop_quit (server)) |
b1ce62a8 | 838 | { |
cc3b64e8 | 839 | error ("Error from POP server: %s", pop_error, 0); |
65396510 | 840 | return EXIT_FAILURE; |
237e0016 | 841 | } |
177c0ea7 | 842 | |
65396510 | 843 | return EXIT_SUCCESS; |
237e0016 RS |
844 | } |
845 | ||
ff804ff5 KH |
846 | int |
847 | pop_retr (server, msgno, arg) | |
b32701a7 | 848 | popserver server; |
b553981f | 849 | int msgno; |
ff804ff5 | 850 | FILE *arg; |
237e0016 | 851 | { |
2e82e3c3 RS |
852 | extern char *strerror (); |
853 | char *line; | |
854 | int ret; | |
237e0016 | 855 | |
2e82e3c3 | 856 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 857 | { |
9b956af2 KH |
858 | char *error = concat ("Error from POP server: ", pop_error, ""); |
859 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 860 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 861 | free(error); |
2e82e3c3 | 862 | return (NOTOK); |
237e0016 RS |
863 | } |
864 | ||
d89d0243 | 865 | while ((ret = pop_retrieve_next (server, &line)) >= 0) |
b1ce62a8 | 866 | { |
2e82e3c3 RS |
867 | if (! line) |
868 | break; | |
869 | ||
d89d0243 | 870 | if (mbx_write (line, ret, arg) != OK) |
b1ce62a8 | 871 | { |
2e82e3c3 RS |
872 | strcpy (Errmsg, strerror (errno)); |
873 | pop_close (server); | |
874 | return (NOTOK); | |
237e0016 RS |
875 | } |
876 | } | |
237e0016 | 877 | |
2e82e3c3 | 878 | if (ret) |
b1ce62a8 | 879 | { |
9b956af2 KH |
880 | char *error = concat ("Error from POP server: ", pop_error, ""); |
881 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 882 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 883 | free(error); |
2e82e3c3 | 884 | return (NOTOK); |
237e0016 RS |
885 | } |
886 | ||
2e82e3c3 | 887 | return (OK); |
237e0016 RS |
888 | } |
889 | ||
2e82e3c3 RS |
890 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
891 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
892 | && (a[1] == 'r') \ | |
893 | && (a[2] == 'o') \ | |
894 | && (a[3] == 'm') \ | |
895 | && (a[4] == ' ')) | |
237e0016 | 896 | |
2e82e3c3 | 897 | int |
d89d0243 | 898 | mbx_write (line, len, mbf) |
b1ce62a8 | 899 | char *line; |
d89d0243 | 900 | int len; |
b1ce62a8 | 901 | FILE *mbf; |
237e0016 | 902 | { |
d04f5031 | 903 | #ifdef MOVEMAIL_QUOTE_POP_FROM_LINES |
2e82e3c3 RS |
904 | if (IS_FROM_LINE (line)) |
905 | { | |
906 | if (fputc ('>', mbf) == EOF) | |
907 | return (NOTOK); | |
908 | } | |
d04f5031 PE |
909 | #endif |
910 | if (line[0] == '\037') | |
911 | { | |
912 | if (fputs ("^_", mbf) == EOF) | |
913 | return (NOTOK); | |
914 | line++; | |
915 | len--; | |
916 | } | |
177c0ea7 | 917 | if (fwrite (line, 1, len, mbf) != len) |
2e82e3c3 RS |
918 | return (NOTOK); |
919 | if (fputc (0x0a, mbf) == EOF) | |
920 | return (NOTOK); | |
921 | return (OK); | |
237e0016 RS |
922 | } |
923 | ||
2e82e3c3 | 924 | int |
b1ce62a8 RS |
925 | mbx_delimit_begin (mbf) |
926 | FILE *mbf; | |
237e0016 | 927 | { |
d228a23c GM |
928 | time_t now; |
929 | struct tm *ltime; | |
930 | char fromline[40] = "From movemail "; | |
931 | ||
932 | now = time (NULL); | |
933 | ltime = localtime (&now); | |
934 | ||
935 | strcat (fromline, asctime (ltime)); | |
936 | ||
937 | if (fputs (fromline, mbf) == EOF) | |
2e82e3c3 RS |
938 | return (NOTOK); |
939 | return (OK); | |
237e0016 RS |
940 | } |
941 | ||
cc3b64e8 | 942 | int |
b1ce62a8 RS |
943 | mbx_delimit_end (mbf) |
944 | FILE *mbf; | |
237e0016 | 945 | { |
3f32be22 | 946 | if (putc ('\n', mbf) == EOF) |
2e82e3c3 RS |
947 | return (NOTOK); |
948 | return (OK); | |
237e0016 RS |
949 | } |
950 | ||
951 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
952 | \f |
953 | #ifndef HAVE_STRERROR | |
954 | char * | |
955 | strerror (errnum) | |
956 | int errnum; | |
957 | { | |
958 | extern char *sys_errlist[]; | |
959 | extern int sys_nerr; | |
960 | ||
961 | if (errnum >= 0 && errnum < sys_nerr) | |
962 | return sys_errlist[errnum]; | |
963 | return (char *) "Unknown error"; | |
964 | } | |
965 | ||
966 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
967 | |
968 | /* arch-tag: 1c323112-41fe-4fe5-8de9-494de631f73f | |
969 | (do not change this comment) */ | |
65396510 TTN |
970 | |
971 | /* movemail.c ends here */ |