xref: /freebsd/usr.bin/mail/quit.c (revision 63d1fd5970ec814904aa0f4580b10a0d302d08b2)
1 /*
2  * Copyright (c) 1980, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #ifndef lint
31 #if 0
32 static char sccsid[] = "@(#)quit.c	8.2 (Berkeley) 4/28/95";
33 #endif
34 #endif /* not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 
38 #include "rcv.h"
39 #include <fcntl.h>
40 #include "extern.h"
41 
42 /*
43  * Rcv -- receive mail rationally.
44  *
45  * Termination processing.
46  */
47 
48 /*
49  * The "quit" command.
50  */
51 int
52 quitcmd(void)
53 {
54 	/*
55 	 * If we are sourcing, then return 1 so execute() can handle it.
56 	 * Otherwise, return -1 to abort command loop.
57 	 */
58 	if (sourcing)
59 		return (1);
60 	return (-1);
61 }
62 
63 /*
64  * Save all of the undetermined messages at the top of "mbox"
65  * Save all untouched messages back in the system mailbox.
66  * Remove the system mailbox, if none saved there.
67  */
68 void
69 quit(void)
70 {
71 	int mcount, p, modify, autohold, anystat, holdbit, nohold;
72 	FILE *ibuf, *obuf, *fbuf, *rbuf, *readstat, *abuf;
73 	struct message *mp;
74 	int c, fd;
75 	struct stat minfo;
76 	char *mbox, tempname[PATHSIZE];
77 
78 	/*
79 	 * If we are read only, we can't do anything,
80 	 * so just return quickly.
81 	 */
82 	if (readonly)
83 		return;
84 	/*
85 	 * If editing (not reading system mail box), then do the work
86 	 * in edstop()
87 	 */
88 	if (edit) {
89 		edstop();
90 		return;
91 	}
92 
93 	/*
94 	 * See if there any messages to save in mbox.  If no, we
95 	 * can save copying mbox to /tmp and back.
96 	 *
97 	 * Check also to see if any files need to be preserved.
98 	 * Delete all untouched messages to keep them out of mbox.
99 	 * If all the messages are to be preserved, just exit with
100 	 * a message.
101 	 */
102 
103 	fbuf = Fopen(mailname, "r");
104 	if (fbuf == NULL)
105 		goto newmail;
106 	(void)flock(fileno(fbuf), LOCK_EX);
107 	rbuf = NULL;
108 	if (fstat(fileno(fbuf), &minfo) >= 0 && minfo.st_size > mailsize) {
109 		printf("New mail has arrived.\n");
110 		(void)snprintf(tempname, sizeof(tempname),
111 		    "%s/mail.RqXXXXXXXXXX", tmpdir);
112 		if ((fd = mkstemp(tempname)) == -1 ||
113 		    (rbuf = Fdopen(fd, "w")) == NULL)
114 			goto newmail;
115 #ifdef APPEND
116 		(void)fseeko(fbuf, mailsize, SEEK_SET);
117 		while ((c = getc(fbuf)) != EOF)
118 			(void)putc(c, rbuf);
119 #else
120 		p = minfo.st_size - mailsize;
121 		while (p-- > 0) {
122 			c = getc(fbuf);
123 			if (c == EOF)
124 				goto newmail;
125 			(void)putc(c, rbuf);
126 		}
127 #endif
128 		(void)Fclose(rbuf);
129 		if ((rbuf = Fopen(tempname, "r")) == NULL)
130 			goto newmail;
131 		(void)rm(tempname);
132 	}
133 
134 	/*
135 	 * Adjust the message flags in each message.
136 	 */
137 
138 	anystat = 0;
139 	autohold = value("hold") != NULL;
140 	holdbit = autohold ? MPRESERVE : MBOX;
141 	nohold = MBOX|MSAVED|MDELETED|MPRESERVE;
142 	if (value("keepsave") != NULL)
143 		nohold &= ~MSAVED;
144 	for (mp = &message[0]; mp < &message[msgCount]; mp++) {
145 		if (mp->m_flag & MNEW) {
146 			mp->m_flag &= ~MNEW;
147 			mp->m_flag |= MSTATUS;
148 		}
149 		if (mp->m_flag & MSTATUS)
150 			anystat++;
151 		if ((mp->m_flag & MTOUCH) == 0)
152 			mp->m_flag |= MPRESERVE;
153 		if ((mp->m_flag & nohold) == 0)
154 			mp->m_flag |= holdbit;
155 	}
156 	modify = 0;
157 	if (Tflag != NULL) {
158 		if ((readstat = Fopen(Tflag, "w")) == NULL)
159 			Tflag = NULL;
160 	}
161 	for (c = 0, p = 0, mp = &message[0]; mp < &message[msgCount]; mp++) {
162 		if (mp->m_flag & MBOX)
163 			c++;
164 		if (mp->m_flag & MPRESERVE)
165 			p++;
166 		if (mp->m_flag & MODIFY)
167 			modify++;
168 		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
169 			char *id;
170 
171 			if ((id = hfield("article-id", mp)) != NULL)
172 				fprintf(readstat, "%s\n", id);
173 		}
174 	}
175 	if (Tflag != NULL)
176 		(void)Fclose(readstat);
177 	if (p == msgCount && !modify && !anystat) {
178 		printf("Held %d message%s in %s\n",
179 			p, p == 1 ? "" : "s", mailname);
180 		(void)Fclose(fbuf);
181 		return;
182 	}
183 	if (c == 0) {
184 		if (p != 0) {
185 			writeback(rbuf);
186 			(void)Fclose(fbuf);
187 			return;
188 		}
189 		goto cream;
190 	}
191 
192 	/*
193 	 * Create another temporary file and copy user's mbox file
194 	 * darin.  If there is no mbox, copy nothing.
195 	 * If he has specified "append" don't copy his mailbox,
196 	 * just copy saveable entries at the end.
197 	 */
198 
199 	mbox = expand("&");
200 	mcount = c;
201 	if (value("append") == NULL) {
202 		(void)snprintf(tempname, sizeof(tempname),
203 		    "%s/mail.RmXXXXXXXXXX", tmpdir);
204 		if ((fd = mkstemp(tempname)) == -1 ||
205 		    (obuf = Fdopen(fd, "w")) == NULL) {
206 			warn("%s", tempname);
207 			(void)Fclose(fbuf);
208 			return;
209 		}
210 		if ((ibuf = Fopen(tempname, "r")) == NULL) {
211 			warn("%s", tempname);
212 			(void)rm(tempname);
213 			(void)Fclose(obuf);
214 			(void)Fclose(fbuf);
215 			return;
216 		}
217 		(void)rm(tempname);
218 		if ((abuf = Fopen(mbox, "r")) != NULL) {
219 			while ((c = getc(abuf)) != EOF)
220 				(void)putc(c, obuf);
221 			(void)Fclose(abuf);
222 		}
223 		if (ferror(obuf)) {
224 			warnx("%s", tempname);
225 			(void)Fclose(ibuf);
226 			(void)Fclose(obuf);
227 			(void)Fclose(fbuf);
228 			return;
229 		}
230 		(void)Fclose(obuf);
231 		if ((fd = open(mbox, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >= 0)
232 			(void)close(fd);
233 		if ((obuf = Fopen(mbox, "r+")) == NULL) {
234 			warn("%s", mbox);
235 			(void)Fclose(ibuf);
236 			(void)Fclose(fbuf);
237 			return;
238 		}
239 	}
240 	if (value("append") != NULL) {
241 		if ((obuf = Fopen(mbox, "a")) == NULL) {
242 			warn("%s", mbox);
243 			(void)Fclose(fbuf);
244 			return;
245 		}
246 		(void)fchmod(fileno(obuf), 0600);
247 	}
248 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
249 		if (mp->m_flag & MBOX)
250 			if (sendmessage(mp, obuf, saveignore, NULL) < 0) {
251 				warnx("%s", mbox);
252 				(void)Fclose(ibuf);
253 				(void)Fclose(obuf);
254 				(void)Fclose(fbuf);
255 				return;
256 			}
257 
258 	/*
259 	 * Copy the user's old mbox contents back
260 	 * to the end of the stuff we just saved.
261 	 * If we are appending, this is unnecessary.
262 	 */
263 
264 	if (value("append") == NULL) {
265 		rewind(ibuf);
266 		c = getc(ibuf);
267 		while (c != EOF) {
268 			(void)putc(c, obuf);
269 			if (ferror(obuf))
270 				break;
271 			c = getc(ibuf);
272 		}
273 		(void)Fclose(ibuf);
274 	}
275 	(void)fflush(obuf);
276 	trunc(obuf);
277 	if (ferror(obuf)) {
278 		warn("%s", mbox);
279 		(void)Fclose(obuf);
280 		(void)Fclose(fbuf);
281 		return;
282 	}
283 	(void)Fclose(obuf);
284 	if (mcount == 1)
285 		printf("Saved 1 message in mbox\n");
286 	else
287 		printf("Saved %d messages in mbox\n", mcount);
288 
289 	/*
290 	 * Now we are ready to copy back preserved files to
291 	 * the system mailbox, if any were requested.
292 	 */
293 
294 	if (p != 0) {
295 		writeback(rbuf);
296 		(void)Fclose(fbuf);
297 		return;
298 	}
299 
300 	/*
301 	 * Finally, remove his /var/mail file.
302 	 * If new mail has arrived, copy it back.
303 	 */
304 
305 cream:
306 	if (rbuf != NULL) {
307 		abuf = Fopen(mailname, "r+");
308 		if (abuf == NULL)
309 			goto newmail;
310 		while ((c = getc(rbuf)) != EOF)
311 			(void)putc(c, abuf);
312 		(void)Fclose(rbuf);
313 		trunc(abuf);
314 		(void)Fclose(abuf);
315 		alter(mailname);
316 		(void)Fclose(fbuf);
317 		return;
318 	}
319 	demail();
320 	(void)Fclose(fbuf);
321 	return;
322 
323 newmail:
324 	printf("Thou hast new mail.\n");
325 	if (fbuf != NULL)
326 		(void)Fclose(fbuf);
327 }
328 
329 /*
330  * Preserve all the appropriate messages back in the system
331  * mailbox, and print a nice message indicated how many were
332  * saved.  On any error, just return -1.  Else return 0.
333  * Incorporate the any new mail that we found.
334  */
335 int
336 writeback(FILE *res)
337 {
338 	struct message *mp;
339 	int p, c;
340 	FILE *obuf;
341 
342 	p = 0;
343 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
344 		warn("%s", mailname);
345 		return (-1);
346 	}
347 #ifndef APPEND
348 	if (res != NULL)
349 		while ((c = getc(res)) != EOF)
350 			(void)putc(c, obuf);
351 #endif
352 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
353 		if ((mp->m_flag&MPRESERVE)||(mp->m_flag&MTOUCH)==0) {
354 			p++;
355 			if (sendmessage(mp, obuf, NULL, NULL) < 0) {
356 				warnx("%s", mailname);
357 				(void)Fclose(obuf);
358 				return (-1);
359 			}
360 		}
361 #ifdef APPEND
362 	if (res != NULL)
363 		while ((c = getc(res)) != EOF)
364 			(void)putc(c, obuf);
365 #endif
366 	(void)fflush(obuf);
367 	trunc(obuf);
368 	if (ferror(obuf)) {
369 		warn("%s", mailname);
370 		(void)Fclose(obuf);
371 		return (-1);
372 	}
373 	if (res != NULL)
374 		(void)Fclose(res);
375 	(void)Fclose(obuf);
376 	alter(mailname);
377 	if (p == 1)
378 		printf("Held 1 message in %s\n", mailname);
379 	else
380 		printf("Held %d messages in %s\n", p, mailname);
381 	return (0);
382 }
383 
384 /*
385  * Terminate an editing session by attempting to write out the user's
386  * file from the temporary.  Save any new stuff appended to the file.
387  */
388 void
389 edstop(void)
390 {
391 	int gotcha, c;
392 	struct message *mp;
393 	FILE *obuf, *ibuf, *readstat;
394 	struct stat statb;
395 	char tempname[PATHSIZE];
396 
397 	if (readonly)
398 		return;
399 	holdsigs();
400 	if (Tflag != NULL) {
401 		if ((readstat = Fopen(Tflag, "w")) == NULL)
402 			Tflag = NULL;
403 	}
404 	for (mp = &message[0], gotcha = 0; mp < &message[msgCount]; mp++) {
405 		if (mp->m_flag & MNEW) {
406 			mp->m_flag &= ~MNEW;
407 			mp->m_flag |= MSTATUS;
408 		}
409 		if (mp->m_flag & (MODIFY|MDELETED|MSTATUS))
410 			gotcha++;
411 		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
412 			char *id;
413 
414 			if ((id = hfield("article-id", mp)) != NULL)
415 				fprintf(readstat, "%s\n", id);
416 		}
417 	}
418 	if (Tflag != NULL)
419 		(void)Fclose(readstat);
420 	if (!gotcha || Tflag != NULL)
421 		goto done;
422 	ibuf = NULL;
423 	if (stat(mailname, &statb) >= 0 && statb.st_size > mailsize) {
424 		int fd;
425 
426 		(void)snprintf(tempname, sizeof(tempname),
427 		    "%s/mbox.XXXXXXXXXX", tmpdir);
428 		if ((fd = mkstemp(tempname)) == -1 ||
429 		    (obuf = Fdopen(fd, "w")) == NULL) {
430 			warn("%s", tempname);
431 			relsesigs();
432 			reset(0);
433 		}
434 		if ((ibuf = Fopen(mailname, "r")) == NULL) {
435 			warn("%s", mailname);
436 			(void)Fclose(obuf);
437 			(void)rm(tempname);
438 			relsesigs();
439 			reset(0);
440 		}
441 		(void)fseeko(ibuf, mailsize, SEEK_SET);
442 		while ((c = getc(ibuf)) != EOF)
443 			(void)putc(c, obuf);
444 		(void)Fclose(ibuf);
445 		(void)Fclose(obuf);
446 		if ((ibuf = Fopen(tempname, "r")) == NULL) {
447 			warn("%s", tempname);
448 			(void)rm(tempname);
449 			relsesigs();
450 			reset(0);
451 		}
452 		(void)rm(tempname);
453 	}
454 	printf("\"%s\" ", mailname);
455 	(void)fflush(stdout);
456 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
457 		warn("%s", mailname);
458 		relsesigs();
459 		reset(0);
460 	}
461 	trunc(obuf);
462 	c = 0;
463 	for (mp = &message[0]; mp < &message[msgCount]; mp++) {
464 		if ((mp->m_flag & MDELETED) != 0)
465 			continue;
466 		c++;
467 		if (sendmessage(mp, obuf, NULL, NULL) < 0) {
468 			warnx("%s", mailname);
469 			relsesigs();
470 			reset(0);
471 		}
472 	}
473 	gotcha = (c == 0 && ibuf == NULL);
474 	if (ibuf != NULL) {
475 		while ((c = getc(ibuf)) != EOF)
476 			(void)putc(c, obuf);
477 		(void)Fclose(ibuf);
478 	}
479 	(void)fflush(obuf);
480 	if (ferror(obuf)) {
481 		warn("%s", mailname);
482 		relsesigs();
483 		reset(0);
484 	}
485 	(void)Fclose(obuf);
486 	if (gotcha) {
487 		(void)rm(mailname);
488 		printf("removed\n");
489 	} else
490 		printf("complete\n");
491 	(void)fflush(stdout);
492 
493 done:
494 	relsesigs();
495 }
496