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, |
114f9c96 | 4 | 2005, 2006, 2007, 2008, 2009, 2010 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> |
bd41a17d | 63 | #include <time.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 | |
1725ae55 AS |
72 | #ifdef HAVE_STRING_H |
73 | #include <string.h> | |
74 | #endif | |
f72adc12 | 75 | #include "syswait.h" |
2e82e3c3 RS |
76 | #ifdef MAIL_USE_POP |
77 | #include "pop.h" | |
78 | #endif | |
237e0016 | 79 | |
91cf09ac RS |
80 | #ifdef MSDOS |
81 | #undef access | |
82 | #endif /* MSDOS */ | |
83 | ||
61946d67 RS |
84 | #ifndef DIRECTORY_SEP |
85 | #define DIRECTORY_SEP '/' | |
86 | #endif | |
87 | #ifndef IS_DIRECTORY_SEP | |
88 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
89 | #endif | |
90 | ||
7f75d5c6 | 91 | #ifdef WINDOWSNT |
677a7bcf | 92 | #include "ntlib.h" |
7f75d5c6 RS |
93 | #undef access |
94 | #undef unlink | |
95 | #define fork() 0 | |
4822b2e5 | 96 | #define wait(var) (*(var) = 0) |
7f75d5c6 RS |
97 | /* Unfortunately, Samba doesn't seem to properly lock Unix files even |
98 | though the locking call succeeds (and indeed blocks local access from | |
99 | other NT programs). If you have direct file access using an NFS | |
100 | client or something other than Samba, the locking call might work | |
677a7bcf RS |
101 | properly - make sure it does before you enable this! |
102 | ||
103 | [18-Feb-97 andrewi] I now believe my comment above to be incorrect, | |
104 | since it was based on a misunderstanding of how locking calls are | |
105 | implemented and used on Unix. */ | |
106 | //#define DISABLE_DIRECT_ACCESS | |
107 | ||
677a7bcf | 108 | #include <fcntl.h> |
7f75d5c6 RS |
109 | #endif /* WINDOWSNT */ |
110 | ||
4ec9a77a RS |
111 | #ifndef F_OK |
112 | #define F_OK 0 | |
113 | #define X_OK 1 | |
114 | #define W_OK 2 | |
115 | #define R_OK 4 | |
116 | #endif | |
237e0016 | 117 | |
76ed5e01 | 118 | #ifdef WINDOWSNT |
237e0016 RS |
119 | #include <sys/locking.h> |
120 | #endif | |
121 | ||
63cf923d RS |
122 | #ifdef MAIL_USE_LOCKF |
123 | #define MAIL_USE_SYSTEM_LOCK | |
124 | #endif | |
125 | ||
126 | #ifdef MAIL_USE_FLOCK | |
127 | #define MAIL_USE_SYSTEM_LOCK | |
128 | #endif | |
129 | ||
4293ba7f RS |
130 | #ifdef MAIL_USE_MMDF |
131 | extern int lk_open (), lk_close (); | |
132 | #endif | |
133 | ||
a4deff3c | 134 | #if !defined (MAIL_USE_SYSTEM_LOCK) && !defined (MAIL_USE_MMDF) && \ |
dd843b6a DL |
135 | (defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) && \ |
136 | defined (HAVE_MAILLOCK_H) | |
a4deff3c RS |
137 | #include <maillock.h> |
138 | /* We can't use maillock unless we know what directory system mail | |
139 | files appear in. */ | |
140 | #ifdef MAILDIR | |
141 | #define MAIL_USE_MAILLOCK | |
142 | static char *mail_spool_name (); | |
143 | #endif | |
144 | #endif | |
145 | ||
1725ae55 | 146 | #ifndef HAVE_STRERROR |
873fbd0b | 147 | char *strerror (int); |
1725ae55 | 148 | #endif |
517699ca | 149 | #ifdef HAVE_INDEX |
f57e2426 | 150 | extern char *index (const char *, int); |
517699ca DL |
151 | #endif |
152 | #ifdef HAVE_RINDEX | |
f57e2426 | 153 | extern char *rindex (const char *, int); |
517699ca | 154 | #endif |
e2f9d9af | 155 | |
1725ae55 AS |
156 | static void fatal (char *s1, char *s2, char *s3); |
157 | static void error (char *s1, char *s2, char *s3); | |
158 | static void pfatal_with_name (char *name); | |
159 | static void pfatal_and_delete (char *name); | |
160 | static char *concat (char *s1, char *s2, char *s3); | |
161 | static long *xmalloc (unsigned int size); | |
e2ad23ef | 162 | #ifdef MAIL_USE_POP |
1725ae55 AS |
163 | static int popmail (char *mailbox, char *outfile, int preserve, char *password, int reverse_order); |
164 | static int pop_retr (popserver server, int msgno, FILE *arg); | |
165 | static int mbx_write (char *line, int len, FILE *mbf); | |
166 | static int mbx_delimit_begin (FILE *mbf); | |
167 | static int mbx_delimit_end (FILE *mbf); | |
e2ad23ef | 168 | #endif |
237e0016 RS |
169 | |
170 | /* Nonzero means this is name of a lock file to delete on fatal error. */ | |
171 | char *delete_lockname; | |
172 | ||
e2f9d9af | 173 | int |
873fbd0b | 174 | main (int argc, char **argv) |
237e0016 RS |
175 | { |
176 | char *inname, *outname; | |
177 | int indesc, outdesc; | |
237e0016 | 178 | int nread; |
bba104c1 | 179 | int status; |
fea4325c | 180 | int c, preserve_mail = 0; |
237e0016 | 181 | |
63cf923d | 182 | #ifndef MAIL_USE_SYSTEM_LOCK |
237e0016 RS |
183 | struct stat st; |
184 | long now; | |
185 | int tem; | |
186 | char *lockname, *p; | |
906ad89d | 187 | char *tempname; |
237e0016 | 188 | int desc; |
63cf923d | 189 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
237e0016 | 190 | |
a4deff3c RS |
191 | #ifdef MAIL_USE_MAILLOCK |
192 | char *spool_name; | |
193 | #endif | |
194 | ||
a2997b0f KH |
195 | #ifdef MAIL_USE_POP |
196 | int pop_reverse_order = 0; | |
197 | # define ARGSTR "pr" | |
198 | #else /* ! MAIL_USE_POP */ | |
199 | # define ARGSTR "p" | |
200 | #endif /* MAIL_USE_POP */ | |
201 | ||
51a91f9d CY |
202 | uid_t real_gid = getgid(); |
203 | uid_t priv_gid = getegid(); | |
204 | ||
9112a2a9 AI |
205 | #ifdef WINDOWSNT |
206 | /* Ensure all file i/o is in binary mode. */ | |
207 | _fmode = _O_BINARY; | |
208 | #endif | |
209 | ||
237e0016 RS |
210 | delete_lockname = 0; |
211 | ||
a2997b0f | 212 | while ((c = getopt (argc, argv, ARGSTR)) != EOF) |
e2f9d9af | 213 | { |
fea4325c | 214 | switch (c) { |
a2997b0f KH |
215 | #ifdef MAIL_USE_POP |
216 | case 'r': | |
217 | pop_reverse_order = 1; | |
218 | break; | |
219 | #endif | |
fea4325c RS |
220 | case 'p': |
221 | preserve_mail++; | |
222 | break; | |
223 | default: | |
65396510 | 224 | exit (EXIT_FAILURE); |
fea4325c RS |
225 | } |
226 | } | |
227 | ||
228 | if ( | |
229 | #ifdef MAIL_USE_POP | |
230 | (argc - optind < 2) || (argc - optind > 3) | |
231 | #else | |
232 | (argc - optind != 2) | |
233 | #endif | |
234 | ) | |
235 | { | |
fea4325c | 236 | #ifdef MAIL_USE_POP |
f213f2c0 | 237 | fprintf (stderr, "Usage: movemail [-p] [-r] inbox destfile%s\n", |
bb5618fe | 238 | " [POP-password]"); |
fea4325c | 239 | #else |
bb5618fe | 240 | fprintf (stderr, "Usage: movemail [-p] inbox destfile%s\n", ""); |
fea4325c | 241 | #endif |
65396510 | 242 | exit (EXIT_FAILURE); |
e2f9d9af | 243 | } |
237e0016 | 244 | |
fea4325c RS |
245 | inname = argv[optind]; |
246 | outname = argv[optind+1]; | |
237e0016 | 247 | |
4293ba7f RS |
248 | #ifdef MAIL_USE_MMDF |
249 | mmdf_init (argv[0]); | |
250 | #endif | |
251 | ||
af7bd34e | 252 | if (*outname == 0) |
a9eedf40 | 253 | fatal ("Destination file name is empty", 0, 0); |
af7bd34e | 254 | |
237e0016 | 255 | #ifdef MAIL_USE_POP |
12a0565a | 256 | if (!strncmp (inname, "po:", 3)) |
237e0016 | 257 | { |
b3112191 | 258 | int status; |
237e0016 | 259 | |
fea4325c | 260 | status = popmail (inname + 3, outname, preserve_mail, |
a2997b0f KH |
261 | (argc - optind == 3) ? argv[optind+2] : NULL, |
262 | pop_reverse_order); | |
237e0016 RS |
263 | exit (status); |
264 | } | |
265 | ||
51a91f9d CY |
266 | if (setuid (getuid ()) < 0) |
267 | fatal ("Failed to drop privileges", 0, 0); | |
268 | ||
237e0016 RS |
269 | #endif /* MAIL_USE_POP */ |
270 | ||
7f75d5c6 | 271 | #ifndef DISABLE_DIRECT_ACCESS |
4293ba7f | 272 | #ifndef MAIL_USE_MMDF |
63cf923d | 273 | #ifndef MAIL_USE_SYSTEM_LOCK |
a4deff3c RS |
274 | #ifdef MAIL_USE_MAILLOCK |
275 | spool_name = mail_spool_name (inname); | |
276 | if (! spool_name) | |
277 | #endif | |
237e0016 | 278 | { |
a4deff3c RS |
279 | /* Use a lock file named after our first argument with .lock appended: |
280 | If it exists, the mail file is locked. */ | |
281 | /* Note: this locking mechanism is *required* by the mailer | |
282 | (on systems which use it) to prevent loss of mail. | |
283 | ||
284 | On systems that use a lock file, extracting the mail without locking | |
285 | WILL occasionally cause loss of mail due to timing errors! | |
286 | ||
287 | So, if creation of the lock file fails | |
288 | due to access permission on the mail spool directory, | |
289 | you simply MUST change the permission | |
290 | and/or make movemail a setgid program | |
291 | so it can create lock files properly. | |
292 | ||
293 | You might also wish to verify that your system is one | |
294 | which uses lock files for this purpose. Some systems use other methods. | |
295 | ||
296 | If your system uses the `flock' system call for mail locking, | |
297 | define MAIL_USE_SYSTEM_LOCK in config.h or the s-*.h file | |
298 | and recompile movemail. If the s- file for your system | |
299 | should define MAIL_USE_SYSTEM_LOCK but does not, send a bug report | |
300 | to bug-gnu-emacs@prep.ai.mit.edu so we can fix it. */ | |
301 | ||
302 | lockname = concat (inname, ".lock", ""); | |
303 | tempname = (char *) xmalloc (strlen (inname) + strlen ("EXXXXXX") + 1); | |
304 | strcpy (tempname, inname); | |
305 | p = tempname + strlen (tempname); | |
306 | while (p != tempname && !IS_DIRECTORY_SEP (p[-1])) | |
307 | p--; | |
308 | *p = 0; | |
309 | strcpy (p, "EXXXXXX"); | |
310 | mktemp (tempname); | |
cfa191ff | 311 | unlink (tempname); |
237e0016 | 312 | |
a4deff3c | 313 | while (1) |
237e0016 | 314 | { |
a4deff3c RS |
315 | /* Create the lock file, but not under the lock file name. */ |
316 | /* Give up if cannot do that. */ | |
317 | desc = open (tempname, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
318 | if (desc < 0) | |
319 | { | |
320 | char *message = (char *) xmalloc (strlen (tempname) + 50); | |
4b265472 | 321 | sprintf (message, "creating %s, which would become the lock file", |
a4deff3c RS |
322 | tempname); |
323 | pfatal_with_name (message); | |
324 | } | |
325 | close (desc); | |
326 | ||
327 | tem = link (tempname, lockname); | |
097e9c90 CY |
328 | |
329 | #ifdef EPERM | |
330 | if (tem < 0 && errno == EPERM) | |
331 | fatal ("Unable to create hard link between %s and %s", | |
332 | tempname, lockname); | |
333 | #endif | |
334 | ||
a4deff3c RS |
335 | unlink (tempname); |
336 | if (tem >= 0) | |
337 | break; | |
338 | sleep (1); | |
339 | ||
340 | /* If lock file is five minutes old, unlock it. | |
341 | Five minutes should be good enough to cope with crashes | |
342 | and wedgitude, and long enough to avoid being fooled | |
343 | by time differences between machines. */ | |
344 | if (stat (lockname, &st) >= 0) | |
345 | { | |
346 | now = time (0); | |
347 | if (st.st_ctime < now - 300) | |
348 | unlink (lockname); | |
349 | } | |
237e0016 | 350 | } |
237e0016 | 351 | |
a4deff3c RS |
352 | delete_lockname = lockname; |
353 | } | |
63cf923d RS |
354 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
355 | #endif /* not MAIL_USE_MMDF */ | |
237e0016 | 356 | |
8ca83cfd RS |
357 | if (fork () == 0) |
358 | { | |
25025815 | 359 | int lockcount = 0; |
a4deff3c RS |
360 | int status = 0; |
361 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) | |
bd41a17d | 362 | time_t touched_lock, now; |
a4deff3c | 363 | #endif |
25025815 | 364 | |
51a91f9d CY |
365 | if (setuid (getuid ()) < 0 || setegid (real_gid) < 0) |
366 | fatal ("Failed to drop privileges", 0, 0); | |
8ca83cfd | 367 | |
63cf923d RS |
368 | #ifndef MAIL_USE_MMDF |
369 | #ifdef MAIL_USE_SYSTEM_LOCK | |
8ca83cfd | 370 | indesc = open (inname, O_RDWR); |
63cf923d | 371 | #else /* if not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 372 | indesc = open (inname, O_RDONLY); |
63cf923d | 373 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd RS |
374 | #else /* MAIL_USE_MMDF */ |
375 | indesc = lk_open (inname, O_RDONLY, 0, 0, 10); | |
4293ba7f RS |
376 | #endif /* MAIL_USE_MMDF */ |
377 | ||
8ca83cfd RS |
378 | if (indesc < 0) |
379 | pfatal_with_name (inname); | |
237e0016 | 380 | |
76ed5e01 | 381 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
382 | /* In case movemail is setuid to root, make sure the user can |
383 | read the output file. */ | |
384 | /* This is desirable for all systems | |
385 | but I don't want to assume all have the umask system call */ | |
386 | umask (umask (0) & 0333); | |
76ed5e01 | 387 | #endif /* BSD_SYSTEM */ |
8ca83cfd RS |
388 | outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666); |
389 | if (outdesc < 0) | |
390 | pfatal_with_name (outname); | |
25025815 | 391 | |
51a91f9d CY |
392 | if (setegid (priv_gid) < 0) |
393 | fatal ("Failed to regain privileges", 0, 0); | |
394 | ||
25025815 RS |
395 | /* This label exists so we can retry locking |
396 | after a delay, if it got EAGAIN or EBUSY. */ | |
397 | retry_lock: | |
398 | ||
399 | /* Try to lock it. */ | |
a4deff3c RS |
400 | #ifdef MAIL_USE_MAILLOCK |
401 | if (spool_name) | |
402 | { | |
403 | /* The "0 - " is to make it a negative number if maillock returns | |
404 | non-zero. */ | |
405 | status = 0 - maillock (spool_name, 1); | |
406 | #ifdef HAVE_TOUCHLOCK | |
407 | touched_lock = time (0); | |
408 | #endif | |
409 | lockcount = 5; | |
410 | } | |
411 | else | |
412 | #endif /* MAIL_USE_MAILLOCK */ | |
413 | { | |
63cf923d RS |
414 | #ifdef MAIL_USE_SYSTEM_LOCK |
415 | #ifdef MAIL_USE_LOCKF | |
a4deff3c | 416 | status = lockf (indesc, F_LOCK, 0); |
63cf923d | 417 | #else /* not MAIL_USE_LOCKF */ |
7f75d5c6 | 418 | #ifdef WINDOWSNT |
a4deff3c | 419 | status = locking (indesc, LK_RLCK, -1L); |
237e0016 | 420 | #else |
a4deff3c | 421 | status = flock (indesc, LOCK_EX); |
237e0016 | 422 | #endif |
63cf923d RS |
423 | #endif /* not MAIL_USE_LOCKF */ |
424 | #endif /* MAIL_USE_SYSTEM_LOCK */ | |
a4deff3c | 425 | } |
237e0016 | 426 | |
25025815 RS |
427 | /* If it fails, retry up to 5 times |
428 | for certain failure codes. */ | |
429 | if (status < 0) | |
430 | { | |
431 | if (++lockcount <= 5) | |
432 | { | |
433 | #ifdef EAGAIN | |
434 | if (errno == EAGAIN) | |
435 | { | |
436 | sleep (1); | |
437 | goto retry_lock; | |
438 | } | |
439 | #endif | |
440 | #ifdef EBUSY | |
441 | if (errno == EBUSY) | |
442 | { | |
443 | sleep (1); | |
444 | goto retry_lock; | |
445 | } | |
446 | #endif | |
447 | } | |
448 | ||
449 | pfatal_with_name (inname); | |
450 | } | |
177c0ea7 | 451 | |
08564963 | 452 | { |
8ca83cfd RS |
453 | char buf[1024]; |
454 | ||
455 | while (1) | |
08564963 | 456 | { |
8ca83cfd | 457 | nread = read (indesc, buf, sizeof buf); |
5e5b35c7 RS |
458 | if (nread < 0) |
459 | pfatal_with_name (inname); | |
8ca83cfd RS |
460 | if (nread != write (outdesc, buf, nread)) |
461 | { | |
462 | int saved_errno = errno; | |
463 | unlink (outname); | |
464 | errno = saved_errno; | |
465 | pfatal_with_name (outname); | |
466 | } | |
467 | if (nread < sizeof buf) | |
468 | break; | |
a4deff3c RS |
469 | #if defined (MAIL_USE_MAILLOCK) && defined (HAVE_TOUCHLOCK) |
470 | if (spool_name) | |
471 | { | |
472 | now = time (0); | |
473 | if (now - touched_lock > 60) | |
474 | { | |
475 | touchlock (); | |
476 | touched_lock = now; | |
477 | } | |
478 | } | |
479 | #endif /* MAIL_USE_MAILLOCK */ | |
08564963 | 480 | } |
08564963 | 481 | } |
237e0016 | 482 | |
e397a017 | 483 | #ifdef BSD_SYSTEM |
8ca83cfd RS |
484 | if (fsync (outdesc) < 0) |
485 | pfatal_and_delete (outname); | |
237e0016 RS |
486 | #endif |
487 | ||
51a91f9d CY |
488 | /* Prevent symlink attacks truncating other users' mailboxes */ |
489 | if (setegid (real_gid) < 0) | |
490 | fatal ("Failed to drop privileges", 0, 0); | |
491 | ||
8ca83cfd RS |
492 | /* Check to make sure no errors before we zap the inbox. */ |
493 | if (close (outdesc) != 0) | |
494 | pfatal_and_delete (outname); | |
237e0016 | 495 | |
63cf923d | 496 | #ifdef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
497 | if (! preserve_mail) |
498 | { | |
fea4325c | 499 | ftruncate (indesc, 0L); |
b1cb2966 | 500 | } |
63cf923d | 501 | #endif /* MAIL_USE_SYSTEM_LOCK */ |
4293ba7f RS |
502 | |
503 | #ifdef MAIL_USE_MMDF | |
8ca83cfd | 504 | lk_close (indesc, 0, 0, 0); |
4293ba7f | 505 | #else |
8ca83cfd | 506 | close (indesc); |
4293ba7f | 507 | #endif |
237e0016 | 508 | |
63cf923d | 509 | #ifndef MAIL_USE_SYSTEM_LOCK |
fea4325c RS |
510 | if (! preserve_mail) |
511 | { | |
512 | /* Delete the input file; if we can't, at least get rid of its | |
513 | contents. */ | |
e97dd183 | 514 | #ifdef MAIL_UNLINK_SPOOL |
fea4325c RS |
515 | /* This is generally bad to do, because it destroys the permissions |
516 | that were set on the file. Better to just empty the file. */ | |
517 | if (unlink (inname) < 0 && errno != ENOENT) | |
e97dd183 | 518 | #endif /* MAIL_UNLINK_SPOOL */ |
fea4325c RS |
519 | creat (inname, 0600); |
520 | } | |
63cf923d | 521 | #endif /* not MAIL_USE_SYSTEM_LOCK */ |
8ca83cfd | 522 | |
51a91f9d CY |
523 | /* End of mailbox truncation */ |
524 | if (setegid (priv_gid) < 0) | |
525 | fatal ("Failed to regain privileges", 0, 0); | |
526 | ||
a4deff3c RS |
527 | #ifdef MAIL_USE_MAILLOCK |
528 | /* This has to occur in the child, i.e., in the process that | |
529 | acquired the lock! */ | |
530 | if (spool_name) | |
531 | mailunlock (); | |
532 | #endif | |
65396510 | 533 | exit (EXIT_SUCCESS); |
8ca83cfd RS |
534 | } |
535 | ||
536 | wait (&status); | |
537 | if (!WIFEXITED (status)) | |
65396510 | 538 | exit (EXIT_FAILURE); |
8ca83cfd RS |
539 | else if (WRETCODE (status) != 0) |
540 | exit (WRETCODE (status)); | |
541 | ||
63cf923d | 542 | #if !defined (MAIL_USE_MMDF) && !defined (MAIL_USE_SYSTEM_LOCK) |
a4deff3c RS |
543 | #ifdef MAIL_USE_MAILLOCK |
544 | if (! spool_name) | |
545 | #endif /* MAIL_USE_MAILLOCK */ | |
546 | unlink (lockname); | |
63cf923d | 547 | #endif /* not MAIL_USE_MMDF and not MAIL_USE_SYSTEM_LOCK */ |
7f75d5c6 RS |
548 | |
549 | #endif /* ! DISABLE_DIRECT_ACCESS */ | |
550 | ||
65396510 | 551 | return EXIT_SUCCESS; |
237e0016 | 552 | } |
a4deff3c RS |
553 | |
554 | #ifdef MAIL_USE_MAILLOCK | |
555 | /* This function uses stat to confirm that the mail directory is | |
556 | identical to the directory of the input file, rather than just | |
557 | string-comparing the two paths, because one or both of them might | |
558 | be symbolic links pointing to some other directory. */ | |
559 | static char * | |
560 | mail_spool_name (inname) | |
561 | char *inname; | |
562 | { | |
563 | struct stat stat1, stat2; | |
564 | char *indir, *fname; | |
565 | int status; | |
566 | ||
567 | if (! (fname = rindex (inname, '/'))) | |
568 | return NULL; | |
569 | ||
570 | fname++; | |
571 | ||
572 | if (stat (MAILDIR, &stat1) < 0) | |
573 | return NULL; | |
574 | ||
575 | indir = (char *) xmalloc (fname - inname + 1); | |
576 | strncpy (indir, inname, fname - inname); | |
577 | indir[fname-inname] = '\0'; | |
578 | ||
579 | ||
580 | status = stat (indir, &stat2); | |
581 | ||
582 | free (indir); | |
583 | ||
584 | if (status < 0) | |
585 | return NULL; | |
586 | ||
c4009c1f RS |
587 | if (stat1.st_dev == stat2.st_dev |
588 | && stat1.st_ino == stat2.st_ino) | |
a4deff3c RS |
589 | return fname; |
590 | ||
591 | return NULL; | |
592 | } | |
593 | #endif /* MAIL_USE_MAILLOCK */ | |
237e0016 RS |
594 | \f |
595 | /* Print error message and exit. */ | |
596 | ||
1725ae55 | 597 | static void |
873fbd0b | 598 | fatal (char *s1, char *s2, char *s3) |
237e0016 RS |
599 | { |
600 | if (delete_lockname) | |
601 | unlink (delete_lockname); | |
a9eedf40 | 602 | error (s1, s2, s3); |
65396510 | 603 | exit (EXIT_FAILURE); |
237e0016 RS |
604 | } |
605 | ||
cc3b64e8 DL |
606 | /* Print error message. `s1' is printf control string, `s2' and `s3' |
607 | are args for it or null. */ | |
237e0016 | 608 | |
1725ae55 | 609 | static void |
873fbd0b | 610 | error (char *s1, char *s2, char *s3) |
237e0016 | 611 | { |
e2f9d9af | 612 | fprintf (stderr, "movemail: "); |
cc3b64e8 DL |
613 | if (s3) |
614 | fprintf (stderr, s1, s2, s3); | |
615 | else if (s2) | |
616 | fprintf (stderr, s1, s2); | |
617 | else | |
3b3807f8 | 618 | fprintf (stderr, "%s", s1); |
e2f9d9af | 619 | fprintf (stderr, "\n"); |
237e0016 RS |
620 | } |
621 | ||
1725ae55 | 622 | static void |
873fbd0b | 623 | pfatal_with_name (char *name) |
237e0016 | 624 | { |
a9eedf40 | 625 | fatal ("%s for %s", strerror (errno), name); |
237e0016 RS |
626 | } |
627 | ||
1725ae55 | 628 | static void |
873fbd0b | 629 | pfatal_and_delete (char *name) |
cfa191ff | 630 | { |
a9eedf40 | 631 | char *s = strerror (errno); |
cfa191ff | 632 | unlink (name); |
a9eedf40 | 633 | fatal ("%s for %s", s, name); |
cfa191ff RS |
634 | } |
635 | ||
237e0016 RS |
636 | /* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */ |
637 | ||
1725ae55 | 638 | static char * |
873fbd0b | 639 | concat (char *s1, char *s2, char *s3) |
237e0016 RS |
640 | { |
641 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
642 | char *result = (char *) xmalloc (len1 + len2 + len3 + 1); | |
643 | ||
644 | strcpy (result, s1); | |
645 | strcpy (result + len1, s2); | |
646 | strcpy (result + len1 + len2, s3); | |
647 | *(result + len1 + len2 + len3) = 0; | |
648 | ||
649 | return result; | |
650 | } | |
651 | ||
652 | /* Like malloc but get fatal error if memory is exhausted. */ | |
653 | ||
1725ae55 | 654 | static long * |
873fbd0b | 655 | xmalloc (unsigned int size) |
237e0016 | 656 | { |
2583d6d7 | 657 | long *result = (long *) malloc (size); |
237e0016 | 658 | if (!result) |
a9eedf40 | 659 | fatal ("virtual memory exhausted", 0, 0); |
237e0016 RS |
660 | return result; |
661 | } | |
662 | \f | |
663 | /* This is the guts of the interface to the Post Office Protocol. */ | |
664 | ||
665 | #ifdef MAIL_USE_POP | |
666 | ||
7f75d5c6 | 667 | #ifndef WINDOWSNT |
237e0016 RS |
668 | #include <sys/socket.h> |
669 | #include <netinet/in.h> | |
670 | #include <netdb.h> | |
7f75d5c6 RS |
671 | #else |
672 | #undef _WINSOCKAPI_ | |
673 | #include <winsock.h> | |
674 | #endif | |
cecf0f21 | 675 | #include <pwd.h> |
d228a23c | 676 | #include <string.h> |
237e0016 | 677 | |
237e0016 RS |
678 | #define NOTOK (-1) |
679 | #define OK 0 | |
680 | #define DONE 1 | |
681 | ||
682 | char *progname; | |
683 | FILE *sfi; | |
684 | FILE *sfo; | |
2e82e3c3 RS |
685 | char ibuffer[BUFSIZ]; |
686 | char obuffer[BUFSIZ]; | |
752fb472 DL |
687 | char Errmsg[200]; /* POP errors, at least, can exceed |
688 | the original length of 80. */ | |
237e0016 | 689 | |
476b2799 | 690 | /* |
4d90eee4 | 691 | * The full valid syntax for a POP mailbox specification for movemail |
476b2799 GM |
692 | * is "po:username:hostname". The ":hostname" is optional; if it is |
693 | * omitted, the MAILHOST environment variable will be consulted. Note | |
694 | * that by the time popmail() is called the "po:" has been stripped | |
695 | * off of the front of the mailbox name. | |
696 | * | |
697 | * If the mailbox is in the form "po:username:hostname", then it is | |
698 | * modified by this function -- the second colon is replaced by a | |
699 | * null. | |
65396510 TTN |
700 | * |
701 | * Return a value suitable for passing to `exit'. | |
476b2799 GM |
702 | */ |
703 | ||
1725ae55 | 704 | static int |
873fbd0b | 705 | popmail (char *mailbox, char *outfile, int preserve, char *password, int reverse_order) |
237e0016 | 706 | { |
b1ce62a8 | 707 | int nmsgs, nbytes; |
b1ce62a8 RS |
708 | register int i; |
709 | int mbfi; | |
710 | FILE *mbf; | |
873fbd0b | 711 | char *getenv (const char *); |
b32701a7 | 712 | popserver server; |
a2997b0f | 713 | int start, end, increment; |
476b2799 GM |
714 | char *user, *hostname; |
715 | ||
716 | user = mailbox; | |
717 | if ((hostname = index(mailbox, ':'))) | |
718 | *hostname++ = '\0'; | |
237e0016 | 719 | |
476b2799 | 720 | server = pop_open (hostname, user, password, POP_NO_GETPASS); |
2e82e3c3 | 721 | if (! server) |
b1ce62a8 | 722 | { |
cc3b64e8 | 723 | error ("Error connecting to POP server: %s", pop_error, 0); |
65396510 | 724 | return EXIT_FAILURE; |
237e0016 RS |
725 | } |
726 | ||
2e82e3c3 | 727 | if (pop_stat (server, &nmsgs, &nbytes)) |
b1ce62a8 | 728 | { |
cc3b64e8 | 729 | error ("Error getting message count from POP server: %s", pop_error, 0); |
65396510 | 730 | return EXIT_FAILURE; |
237e0016 RS |
731 | } |
732 | ||
b1ce62a8 RS |
733 | if (!nmsgs) |
734 | { | |
2e82e3c3 | 735 | pop_close (server); |
65396510 | 736 | return EXIT_SUCCESS; |
b1ce62a8 RS |
737 | } |
738 | ||
739 | mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
740 | if (mbfi < 0) | |
741 | { | |
2e82e3c3 RS |
742 | pop_close (server); |
743 | error ("Error in open: %s, %s", strerror (errno), outfile); | |
65396510 | 744 | return EXIT_FAILURE; |
b1ce62a8 RS |
745 | } |
746 | fchown (mbfi, getuid (), -1); | |
747 | ||
7f75d5c6 | 748 | if ((mbf = fdopen (mbfi, "wb")) == NULL) |
b1ce62a8 | 749 | { |
2e82e3c3 | 750 | pop_close (server); |
cc3b64e8 | 751 | error ("Error in fdopen: %s", strerror (errno), 0); |
2e82e3c3 RS |
752 | close (mbfi); |
753 | unlink (outfile); | |
65396510 | 754 | return EXIT_FAILURE; |
b1ce62a8 RS |
755 | } |
756 | ||
a2997b0f KH |
757 | if (reverse_order) |
758 | { | |
759 | start = nmsgs; | |
760 | end = 1; | |
761 | increment = -1; | |
762 | } | |
763 | else | |
764 | { | |
765 | start = 1; | |
766 | end = nmsgs; | |
767 | increment = 1; | |
768 | } | |
769 | ||
770 | for (i = start; i * increment <= end * increment; i += increment) | |
b1ce62a8 RS |
771 | { |
772 | mbx_delimit_begin (mbf); | |
ff804ff5 | 773 | if (pop_retr (server, i, mbf) != OK) |
b1ce62a8 | 774 | { |
17a60964 | 775 | error ("%s", Errmsg, 0); |
b1ce62a8 | 776 | close (mbfi); |
65396510 | 777 | return EXIT_FAILURE; |
237e0016 | 778 | } |
b1ce62a8 RS |
779 | mbx_delimit_end (mbf); |
780 | fflush (mbf); | |
2e82e3c3 RS |
781 | if (ferror (mbf)) |
782 | { | |
cc3b64e8 | 783 | error ("Error in fflush: %s", strerror (errno), 0); |
2e82e3c3 RS |
784 | pop_close (server); |
785 | close (mbfi); | |
65396510 | 786 | return EXIT_FAILURE; |
2e82e3c3 | 787 | } |
237e0016 RS |
788 | } |
789 | ||
2e82e3c3 RS |
790 | /* On AFS, a call to write only modifies the file in the local |
791 | * workstation's AFS cache. The changes are not written to the server | |
792 | * until a call to fsync or close is made. Users with AFS home | |
793 | * directories have lost mail when over quota because these checks were | |
794 | * not made in previous versions of movemail. */ | |
795 | ||
e397a017 | 796 | #ifdef BSD_SYSTEM |
cfa191ff RS |
797 | if (fsync (mbfi) < 0) |
798 | { | |
08fa58c9 | 799 | error ("Error in fsync: %s", strerror (errno), 0); |
65396510 | 800 | return EXIT_FAILURE; |
cfa191ff | 801 | } |
340ff9de | 802 | #endif |
cfa191ff RS |
803 | |
804 | if (close (mbfi) == -1) | |
805 | { | |
cc3b64e8 | 806 | error ("Error in close: %s", strerror (errno), 0); |
65396510 | 807 | return EXIT_FAILURE; |
cfa191ff RS |
808 | } |
809 | ||
fea4325c RS |
810 | if (! preserve) |
811 | for (i = 1; i <= nmsgs; i++) | |
812 | { | |
813 | if (pop_delete (server, i)) | |
814 | { | |
cc3b64e8 | 815 | error ("Error from POP server: %s", pop_error, 0); |
fea4325c | 816 | pop_close (server); |
65396510 | 817 | return EXIT_FAILURE; |
fea4325c RS |
818 | } |
819 | } | |
237e0016 | 820 | |
2e82e3c3 | 821 | if (pop_quit (server)) |
b1ce62a8 | 822 | { |
cc3b64e8 | 823 | error ("Error from POP server: %s", pop_error, 0); |
65396510 | 824 | return EXIT_FAILURE; |
237e0016 | 825 | } |
177c0ea7 | 826 | |
65396510 | 827 | return EXIT_SUCCESS; |
237e0016 RS |
828 | } |
829 | ||
1725ae55 | 830 | static int |
873fbd0b | 831 | pop_retr (popserver server, int msgno, FILE *arg) |
237e0016 | 832 | { |
2e82e3c3 RS |
833 | char *line; |
834 | int ret; | |
237e0016 | 835 | |
2e82e3c3 | 836 | if (pop_retrieve_first (server, msgno, &line)) |
b1ce62a8 | 837 | { |
9b956af2 KH |
838 | char *error = concat ("Error from POP server: ", pop_error, ""); |
839 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 840 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 841 | free(error); |
2e82e3c3 | 842 | return (NOTOK); |
237e0016 RS |
843 | } |
844 | ||
d89d0243 | 845 | while ((ret = pop_retrieve_next (server, &line)) >= 0) |
b1ce62a8 | 846 | { |
2e82e3c3 RS |
847 | if (! line) |
848 | break; | |
849 | ||
d89d0243 | 850 | if (mbx_write (line, ret, arg) != OK) |
b1ce62a8 | 851 | { |
2e82e3c3 RS |
852 | strcpy (Errmsg, strerror (errno)); |
853 | pop_close (server); | |
854 | return (NOTOK); | |
237e0016 RS |
855 | } |
856 | } | |
237e0016 | 857 | |
2e82e3c3 | 858 | if (ret) |
b1ce62a8 | 859 | { |
9b956af2 KH |
860 | char *error = concat ("Error from POP server: ", pop_error, ""); |
861 | strncpy (Errmsg, error, sizeof (Errmsg)); | |
2e82e3c3 | 862 | Errmsg[sizeof (Errmsg)-1] = '\0'; |
9b956af2 | 863 | free(error); |
2e82e3c3 | 864 | return (NOTOK); |
237e0016 RS |
865 | } |
866 | ||
2e82e3c3 | 867 | return (OK); |
237e0016 RS |
868 | } |
869 | ||
2e82e3c3 RS |
870 | /* Do this as a macro instead of using strcmp to save on execution time. */ |
871 | #define IS_FROM_LINE(a) ((a[0] == 'F') \ | |
872 | && (a[1] == 'r') \ | |
873 | && (a[2] == 'o') \ | |
874 | && (a[3] == 'm') \ | |
875 | && (a[4] == ' ')) | |
237e0016 | 876 | |
1725ae55 | 877 | static int |
873fbd0b | 878 | mbx_write (char *line, int len, FILE *mbf) |
237e0016 | 879 | { |
d04f5031 | 880 | #ifdef MOVEMAIL_QUOTE_POP_FROM_LINES |
2e82e3c3 RS |
881 | if (IS_FROM_LINE (line)) |
882 | { | |
883 | if (fputc ('>', mbf) == EOF) | |
884 | return (NOTOK); | |
885 | } | |
d04f5031 PE |
886 | #endif |
887 | if (line[0] == '\037') | |
888 | { | |
889 | if (fputs ("^_", mbf) == EOF) | |
890 | return (NOTOK); | |
891 | line++; | |
892 | len--; | |
893 | } | |
177c0ea7 | 894 | if (fwrite (line, 1, len, mbf) != len) |
2e82e3c3 RS |
895 | return (NOTOK); |
896 | if (fputc (0x0a, mbf) == EOF) | |
897 | return (NOTOK); | |
898 | return (OK); | |
237e0016 RS |
899 | } |
900 | ||
1725ae55 | 901 | static int |
873fbd0b | 902 | mbx_delimit_begin (FILE *mbf) |
237e0016 | 903 | { |
d228a23c GM |
904 | time_t now; |
905 | struct tm *ltime; | |
906 | char fromline[40] = "From movemail "; | |
907 | ||
908 | now = time (NULL); | |
909 | ltime = localtime (&now); | |
910 | ||
911 | strcat (fromline, asctime (ltime)); | |
912 | ||
913 | if (fputs (fromline, mbf) == EOF) | |
2e82e3c3 RS |
914 | return (NOTOK); |
915 | return (OK); | |
237e0016 RS |
916 | } |
917 | ||
1725ae55 | 918 | static int |
873fbd0b | 919 | mbx_delimit_end (FILE *mbf) |
237e0016 | 920 | { |
3f32be22 | 921 | if (putc ('\n', mbf) == EOF) |
2e82e3c3 RS |
922 | return (NOTOK); |
923 | return (OK); | |
237e0016 RS |
924 | } |
925 | ||
926 | #endif /* MAIL_USE_POP */ | |
e5f7ea68 RM |
927 | \f |
928 | #ifndef HAVE_STRERROR | |
929 | char * | |
930 | strerror (errnum) | |
931 | int errnum; | |
932 | { | |
933 | extern char *sys_errlist[]; | |
934 | extern int sys_nerr; | |
935 | ||
936 | if (errnum >= 0 && errnum < sys_nerr) | |
937 | return sys_errlist[errnum]; | |
938 | return (char *) "Unknown error"; | |
939 | } | |
940 | ||
941 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
942 | |
943 | /* arch-tag: 1c323112-41fe-4fe5-8de9-494de631f73f | |
944 | (do not change this comment) */ | |
65396510 TTN |
945 | |
946 | /* movemail.c ends here */ |