xref: /dragonfly/usr.bin/mail/quit.c (revision 4e7eb5cc) 
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  * @(#)quit.c	8.2 (Berkeley) 4/28/95
34  * $FreeBSD: src/usr.bin/mail/quit.c,v 1.2.6.3 2003/01/06 05:46:03 mikeh Exp $
35  * $DragonFly: src/usr.bin/mail/quit.c,v 1.3 2003/10/04 20:36:48 hmp Exp $
36  */
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 		(void)close(open(mbox, O_CREAT | O_TRUNC | O_WRONLY, 0600));
232 		if ((obuf = Fopen(mbox, "r+")) == NULL) {
233 			warn("%s", mbox);
234 			(void)Fclose(ibuf);
235 			(void)Fclose(fbuf);
236 			return;
237 		}
238 	}
239 	if (value("append") != NULL) {
240 		if ((obuf = Fopen(mbox, "a")) == NULL) {
241 			warn("%s", mbox);
242 			(void)Fclose(fbuf);
243 			return;
244 		}
245 		(void)fchmod(fileno(obuf), 0600);
246 	}
247 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
248 		if (mp->m_flag & MBOX)
249 			if (sendmessage(mp, obuf, saveignore, NULL) < 0) {
250 				warnx("%s", mbox);
251 				(void)Fclose(ibuf);
252 				(void)Fclose(obuf);
253 				(void)Fclose(fbuf);
254 				return;
255 			}
256 
257 	/*
258 	 * Copy the user's old mbox contents back
259 	 * to the end of the stuff we just saved.
260 	 * If we are appending, this is unnecessary.
261 	 */
262 
263 	if (value("append") == NULL) {
264 		rewind(ibuf);
265 		c = getc(ibuf);
266 		while (c != EOF) {
267 			(void)putc(c, obuf);
268 			if (ferror(obuf))
269 				break;
270 			c = getc(ibuf);
271 		}
272 		(void)Fclose(ibuf);
273 	}
274 	(void)fflush(obuf);
275 	trunc(obuf);
276 	if (ferror(obuf)) {
277 		warn("%s", mbox);
278 		(void)Fclose(obuf);
279 		(void)Fclose(fbuf);
280 		return;
281 	}
282 	(void)Fclose(obuf);
283 	if (mcount == 1)
284 		printf("Saved 1 message in mbox\n");
285 	else
286 		printf("Saved %d messages in mbox\n", mcount);
287 
288 	/*
289 	 * Now we are ready to copy back preserved files to
290 	 * the system mailbox, if any were requested.
291 	 */
292 
293 	if (p != 0) {
294 		writeback(rbuf);
295 		(void)Fclose(fbuf);
296 		return;
297 	}
298 
299 	/*
300 	 * Finally, remove his /var/mail file.
301 	 * If new mail has arrived, copy it back.
302 	 */
303 
304 cream:
305 	if (rbuf != NULL) {
306 		abuf = Fopen(mailname, "r+");
307 		if (abuf == NULL)
308 			goto newmail;
309 		while ((c = getc(rbuf)) != EOF)
310 			(void)putc(c, abuf);
311 		(void)Fclose(rbuf);
312 		trunc(abuf);
313 		(void)Fclose(abuf);
314 		alter(mailname);
315 		(void)Fclose(fbuf);
316 		return;
317 	}
318 	demail();
319 	(void)Fclose(fbuf);
320 	return;
321 
322 newmail:
323 	printf("Thou hast new mail.\n");
324 	if (fbuf != NULL)
325 		(void)Fclose(fbuf);
326 }
327 
328 /*
329  * Preserve all the appropriate messages back in the system
330  * mailbox, and print a nice message indicated how many were
331  * saved.  On any error, just return -1.  Else return 0.
332  * Incorporate the any new mail that we found.
333  */
334 int
335 writeback(FILE *res)
336 {
337 	struct message *mp;
338 	int p, c;
339 	FILE *obuf;
340 
341 	p = 0;
342 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
343 		warn("%s", mailname);
344 		return (-1);
345 	}
346 #ifndef APPEND
347 	if (res != NULL)
348 		while ((c = getc(res)) != EOF)
349 			(void)putc(c, obuf);
350 #endif
351 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
352 		if ((mp->m_flag&MPRESERVE)||(mp->m_flag&MTOUCH)==0) {
353 			p++;
354 			if (sendmessage(mp, obuf, NULL, NULL) < 0) {
355 				warnx("%s", mailname);
356 				(void)Fclose(obuf);
357 				return (-1);
358 			}
359 		}
360 #ifdef APPEND
361 	if (res != NULL)
362 		while ((c = getc(res)) != EOF)
363 			(void)putc(c, obuf);
364 #endif
365 	(void)fflush(obuf);
366 	trunc(obuf);
367 	if (ferror(obuf)) {
368 		warn("%s", mailname);
369 		(void)Fclose(obuf);
370 		return (-1);
371 	}
372 	if (res != NULL)
373 		(void)Fclose(res);
374 	(void)Fclose(obuf);
375 	alter(mailname);
376 	if (p == 1)
377 		printf("Held 1 message in %s\n", mailname);
378 	else
379 		printf("Held %d messages in %s\n", p, mailname);
380 	return (0);
381 }
382 
383 /*
384  * Terminate an editing session by attempting to write out the user's
385  * file from the temporary.  Save any new stuff appended to the file.
386  */
387 void
388 edstop(void)
389 {
390 	int gotcha, c;
391 	struct message *mp;
392 	FILE *obuf, *ibuf, *readstat;
393 	struct stat statb;
394 	char tempname[PATHSIZE];
395 
396 	if (readonly)
397 		return;
398 	holdsigs();
399 	if (Tflag != NULL) {
400 		if ((readstat = Fopen(Tflag, "w")) == NULL)
401 			Tflag = NULL;
402 	}
403 	for (mp = &message[0], gotcha = 0; mp < &message[msgCount]; mp++) {
404 		if (mp->m_flag & MNEW) {
405 			mp->m_flag &= ~MNEW;
406 			mp->m_flag |= MSTATUS;
407 		}
408 		if (mp->m_flag & (MODIFY|MDELETED|MSTATUS))
409 			gotcha++;
410 		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
411 			char *id;
412 
413 			if ((id = hfield("article-id", mp)) != NULL)
414 				fprintf(readstat, "%s\n", id);
415 		}
416 	}
417 	if (Tflag != NULL)
418 		(void)Fclose(readstat);
419 	if (!gotcha || Tflag != NULL)
420 		goto done;
421 	ibuf = NULL;
422 	if (stat(mailname, &statb) >= 0 && statb.st_size > mailsize) {
423 		int fd;
424 
425 		(void)snprintf(tempname, sizeof(tempname),
426 		    "%s/mbox.XXXXXXXXXX", tmpdir);
427 		if ((fd = mkstemp(tempname)) == -1 ||
428 		    (obuf = Fdopen(fd, "w")) == NULL) {
429 			warn("%s", tempname);
430 			relsesigs();
431 			reset(0);
432 		}
433 		if ((ibuf = Fopen(mailname, "r")) == NULL) {
434 			warn("%s", mailname);
435 			(void)Fclose(obuf);
436 			(void)rm(tempname);
437 			relsesigs();
438 			reset(0);
439 		}
440 		(void)fseeko(ibuf, mailsize, SEEK_SET);
441 		while ((c = getc(ibuf)) != EOF)
442 			(void)putc(c, obuf);
443 		(void)Fclose(ibuf);
444 		(void)Fclose(obuf);
445 		if ((ibuf = Fopen(tempname, "r")) == NULL) {
446 			warn("%s", tempname);
447 			(void)rm(tempname);
448 			relsesigs();
449 			reset(0);
450 		}
451 		(void)rm(tempname);
452 	}
453 	printf("\"%s\" ", mailname);
454 	(void)fflush(stdout);
455 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
456 		warn("%s", mailname);
457 		relsesigs();
458 		reset(0);
459 	}
460 	trunc(obuf);
461 	c = 0;
462 	for (mp = &message[0]; mp < &message[msgCount]; mp++) {
463 		if ((mp->m_flag & MDELETED) != 0)
464 			continue;
465 		c++;
466 		if (sendmessage(mp, obuf, NULL, NULL) < 0) {
467 			warnx("%s", mailname);
468 			relsesigs();
469 			reset(0);
470 		}
471 	}
472 	gotcha = (c == 0 && ibuf == NULL);
473 	if (ibuf != NULL) {
474 		while ((c = getc(ibuf)) != EOF)
475 			(void)putc(c, obuf);
476 		(void)Fclose(ibuf);
477 	}
478 	(void)fflush(obuf);
479 	if (ferror(obuf)) {
480 		warn("%s", mailname);
481 		relsesigs();
482 		reset(0);
483 	}
484 	(void)Fclose(obuf);
485 	if (gotcha) {
486 		(void)rm(mailname);
487 		printf("removed\n");
488 	} else
489 		printf("complete\n");
490 	(void)fflush(stdout);
491 
492 done:
493 	relsesigs();
494 }
495