xref: /dragonfly/usr.bin/mail/quit.c (revision 9348a738) 
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. 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  * @(#)quit.c	8.2 (Berkeley) 4/28/95
30  * $FreeBSD: src/usr.bin/mail/quit.c,v 1.2.6.3 2003/01/06 05:46:03 mikeh Exp $
31  * $DragonFly: src/usr.bin/mail/quit.c,v 1.5 2004/09/08 03:01:11 joerg Exp $
32  */
33 
34 #include "rcv.h"
35 #include <fcntl.h>
36 #include "extern.h"
37 
38 static void	edstop(void);
39 static int	writeback(FILE *res);
40 
41 /*
42  * Rcv -- receive mail rationally.
43  *
44  * Termination processing.
45  */
46 
47 /*
48  * The "quit" command.
49  */
50 int
51 quitcmd(void)
52 {
53 	/*
54 	 * If we are sourcing, then return 1 so execute() can handle it.
55 	 * Otherwise, return -1 to abort command loop.
56 	 */
57 	if (sourcing)
58 		return (1);
59 	return (-1);
60 }
61 
62 /*
63  * Save all of the undetermined messages at the top of "mbox"
64  * Save all untouched messages back in the system mailbox.
65  * Remove the system mailbox, if none saved there.
66  */
67 void
68 quit(void)
69 {
70 	int mcount, p, modify, autohold, anystat, holdbit, nohold;
71 	FILE *ibuf, *obuf, *fbuf, *rbuf, *readstat, *abuf;
72 	struct message *mp;
73 	int c, fd;
74 	struct stat minfo;
75 	char *mbox, tempname[PATHSIZE];
76 
77 	/*
78 	 * If we are read only, we can't do anything,
79 	 * so just return quickly.
80 	 */
81 	if (readonly)
82 		return;
83 	/*
84 	 * If editing (not reading system mail box), then do the work
85 	 * in edstop()
86 	 */
87 	if (edit) {
88 		edstop();
89 		return;
90 	}
91 
92 	/*
93 	 * See if there any messages to save in mbox.  If no, we
94 	 * can save copying mbox to /tmp and back.
95 	 *
96 	 * Check also to see if any files need to be preserved.
97 	 * Delete all untouched messages to keep them out of mbox.
98 	 * If all the messages are to be preserved, just exit with
99 	 * a message.
100 	 */
101 
102 	fbuf = Fopen(mailname, "r");
103 	if (fbuf == NULL)
104 		goto newmail;
105 	flock(fileno(fbuf), LOCK_EX);
106 	rbuf = NULL;
107 	if (fstat(fileno(fbuf), &minfo) >= 0 && minfo.st_size > mailsize) {
108 		printf("New mail has arrived.\n");
109 		snprintf(tempname, sizeof(tempname), "%s/mail.RqXXXXXXXXXX",
110 			 tmpdir);
111 		if ((fd = mkstemp(tempname)) == -1 ||
112 		    (rbuf = Fdopen(fd, "w")) == NULL)
113 			goto newmail;
114 #ifdef APPEND
115 		fseeko(fbuf, mailsize, SEEK_SET);
116 		while ((c = getc(fbuf)) != EOF)
117 			putc(c, rbuf);
118 #else
119 		p = minfo.st_size - mailsize;
120 		while (p-- > 0) {
121 			c = getc(fbuf);
122 			if (c == EOF)
123 				goto newmail;
124 			putc(c, rbuf);
125 		}
126 #endif
127 		Fclose(rbuf);
128 		if ((rbuf = Fopen(tempname, "r")) == NULL)
129 			goto newmail;
130 		rm(tempname);
131 	}
132 
133 	/*
134 	 * Adjust the message flags in each message.
135 	 */
136 
137 	anystat = 0;
138 	autohold = value("hold") != NULL;
139 	holdbit = autohold ? MPRESERVE : MBOX;
140 	nohold = MBOX|MSAVED|MDELETED|MPRESERVE;
141 	if (value("keepsave") != NULL)
142 		nohold &= ~MSAVED;
143 	for (mp = &message[0]; mp < &message[msgCount]; mp++) {
144 		if (mp->m_flag & MNEW) {
145 			mp->m_flag &= ~MNEW;
146 			mp->m_flag |= MSTATUS;
147 		}
148 		if (mp->m_flag & MSTATUS)
149 			anystat++;
150 		if ((mp->m_flag & MTOUCH) == 0)
151 			mp->m_flag |= MPRESERVE;
152 		if ((mp->m_flag & nohold) == 0)
153 			mp->m_flag |= holdbit;
154 	}
155 	modify = 0;
156 	if (Tflag != NULL) {
157 		if ((readstat = Fopen(Tflag, "w")) == NULL)
158 			Tflag = NULL;
159 	}
160 	for (c = 0, p = 0, mp = &message[0]; mp < &message[msgCount]; mp++) {
161 		if (mp->m_flag & MBOX)
162 			c++;
163 		if (mp->m_flag & MPRESERVE)
164 			p++;
165 		if (mp->m_flag & MODIFY)
166 			modify++;
167 		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
168 			char *id;
169 
170 			if ((id = hfield("article-id", mp)) != NULL)
171 				fprintf(readstat, "%s\n", id);
172 		}
173 	}
174 	if (Tflag != NULL)
175 		Fclose(readstat);
176 	if (p == msgCount && !modify && !anystat) {
177 		printf("Held %d message%s in %s\n",
178 			p, p == 1 ? "" : "s", mailname);
179 		Fclose(fbuf);
180 		return;
181 	}
182 	if (c == 0) {
183 		if (p != 0) {
184 			writeback(rbuf);
185 			Fclose(fbuf);
186 			return;
187 		}
188 		goto cream;
189 	}
190 
191 	/*
192 	 * Create another temporary file and copy user's mbox file
193 	 * darin.  If there is no mbox, copy nothing.
194 	 * If he has specified "append" don't copy his mailbox,
195 	 * just copy saveable entries at the end.
196 	 */
197 
198 	mbox = expand("&");
199 	mcount = c;
200 	if (value("append") == NULL) {
201 		snprintf(tempname, sizeof(tempname), "%s/mail.RmXXXXXXXXXX",
202 			 tmpdir);
203 		if ((fd = mkstemp(tempname)) == -1 ||
204 		    (obuf = Fdopen(fd, "w")) == NULL) {
205 			warn("%s", tempname);
206 			Fclose(fbuf);
207 			return;
208 		}
209 		if ((ibuf = Fopen(tempname, "r")) == NULL) {
210 			warn("%s", tempname);
211 			rm(tempname);
212 			Fclose(obuf);
213 			Fclose(fbuf);
214 			return;
215 		}
216 		rm(tempname);
217 		if ((abuf = Fopen(mbox, "r")) != NULL) {
218 			while ((c = getc(abuf)) != EOF)
219 				putc(c, obuf);
220 			Fclose(abuf);
221 		}
222 		if (ferror(obuf)) {
223 			warnx("%s", tempname);
224 			Fclose(ibuf);
225 			Fclose(obuf);
226 			Fclose(fbuf);
227 			return;
228 		}
229 		Fclose(obuf);
230 		close(open(mbox, O_CREAT | O_TRUNC | O_WRONLY, 0600));
231 		if ((obuf = Fopen(mbox, "r+")) == NULL) {
232 			warn("%s", mbox);
233 			Fclose(ibuf);
234 			Fclose(fbuf);
235 			return;
236 		}
237 	}
238 	if (value("append") != NULL) {
239 		if ((obuf = Fopen(mbox, "a")) == NULL) {
240 			warn("%s", mbox);
241 			Fclose(fbuf);
242 			return;
243 		}
244 		fchmod(fileno(obuf), 0600);
245 	}
246 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
247 		if (mp->m_flag & MBOX)
248 			if (sendmessage(mp, obuf, saveignore, NULL) < 0) {
249 				warnx("%s", mbox);
250 				Fclose(ibuf);
251 				Fclose(obuf);
252 				Fclose(fbuf);
253 				return;
254 			}
255 
256 	/*
257 	 * Copy the user's old mbox contents back
258 	 * to the end of the stuff we just saved.
259 	 * If we are appending, this is unnecessary.
260 	 */
261 
262 	if (value("append") == NULL) {
263 		rewind(ibuf);
264 		c = getc(ibuf);
265 		while (c != EOF) {
266 			putc(c, obuf);
267 			if (ferror(obuf))
268 				break;
269 			c = getc(ibuf);
270 		}
271 		Fclose(ibuf);
272 	}
273 	fflush(obuf);
274 	trunc(obuf);
275 	if (ferror(obuf)) {
276 		warn("%s", mbox);
277 		Fclose(obuf);
278 		Fclose(fbuf);
279 		return;
280 	}
281 	Fclose(obuf);
282 	if (mcount == 1)
283 		printf("Saved 1 message in mbox\n");
284 	else
285 		printf("Saved %d messages in mbox\n", mcount);
286 
287 	/*
288 	 * Now we are ready to copy back preserved files to
289 	 * the system mailbox, if any were requested.
290 	 */
291 
292 	if (p != 0) {
293 		writeback(rbuf);
294 		Fclose(fbuf);
295 		return;
296 	}
297 
298 	/*
299 	 * Finally, remove his /var/mail file.
300 	 * If new mail has arrived, copy it back.
301 	 */
302 
303 cream:
304 	if (rbuf != NULL) {
305 		abuf = Fopen(mailname, "r+");
306 		if (abuf == NULL)
307 			goto newmail;
308 		while ((c = getc(rbuf)) != EOF)
309 			putc(c, abuf);
310 		Fclose(rbuf);
311 		trunc(abuf);
312 		Fclose(abuf);
313 		alter(mailname);
314 		Fclose(fbuf);
315 		return;
316 	}
317 	demail();
318 	Fclose(fbuf);
319 	return;
320 
321 newmail:
322 	printf("Thou hast new mail.\n");
323 	if (fbuf != NULL)
324 		Fclose(fbuf);
325 }
326 
327 /*
328  * Preserve all the appropriate messages back in the system
329  * mailbox, and print a nice message indicated how many were
330  * saved.  On any error, just return -1.  Else return 0.
331  * Incorporate the any new mail that we found.
332  */
333 static int
334 writeback(FILE *res)
335 {
336 	struct message *mp;
337 	int p, c;
338 	FILE *obuf;
339 
340 	p = 0;
341 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
342 		warn("%s", mailname);
343 		return (-1);
344 	}
345 #ifndef APPEND
346 	if (res != NULL)
347 		while ((c = getc(res)) != EOF)
348 			putc(c, obuf);
349 #endif
350 	for (mp = &message[0]; mp < &message[msgCount]; mp++)
351 		if ((mp->m_flag&MPRESERVE)||(mp->m_flag&MTOUCH)==0) {
352 			p++;
353 			if (sendmessage(mp, obuf, NULL, NULL) < 0) {
354 				warnx("%s", mailname);
355 				Fclose(obuf);
356 				return (-1);
357 			}
358 		}
359 #ifdef APPEND
360 	if (res != NULL)
361 		while ((c = getc(res)) != EOF)
362 			putc(c, obuf);
363 #endif
364 	fflush(obuf);
365 	trunc(obuf);
366 	if (ferror(obuf)) {
367 		warn("%s", mailname);
368 		Fclose(obuf);
369 		return (-1);
370 	}
371 	if (res != NULL)
372 		Fclose(res);
373 	Fclose(obuf);
374 	alter(mailname);
375 	if (p == 1)
376 		printf("Held 1 message in %s\n", mailname);
377 	else
378 		printf("Held %d messages in %s\n", p, mailname);
379 	return (0);
380 }
381 
382 /*
383  * Terminate an editing session by attempting to write out the user's
384  * file from the temporary.  Save any new stuff appended to the file.
385  */
386 static void
387 edstop(void)
388 {
389 	int gotcha, c;
390 	struct message *mp;
391 	FILE *obuf, *ibuf, *readstat;
392 	struct stat statb;
393 	char tempname[PATHSIZE];
394 
395 	if (readonly)
396 		return;
397 	holdsigs();
398 	if (Tflag != NULL) {
399 		if ((readstat = Fopen(Tflag, "w")) == NULL)
400 			Tflag = NULL;
401 	}
402 	for (mp = &message[0], gotcha = 0; mp < &message[msgCount]; mp++) {
403 		if (mp->m_flag & MNEW) {
404 			mp->m_flag &= ~MNEW;
405 			mp->m_flag |= MSTATUS;
406 		}
407 		if (mp->m_flag & (MODIFY|MDELETED|MSTATUS))
408 			gotcha++;
409 		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
410 			char *id;
411 
412 			if ((id = hfield("article-id", mp)) != NULL)
413 				fprintf(readstat, "%s\n", id);
414 		}
415 	}
416 	if (Tflag != NULL)
417 		Fclose(readstat);
418 	if (!gotcha || Tflag != NULL)
419 		goto done;
420 	ibuf = NULL;
421 	if (stat(mailname, &statb) >= 0 && statb.st_size > mailsize) {
422 		int fd;
423 
424 		snprintf(tempname, sizeof(tempname), "%s/mbox.XXXXXXXXXX",
425 			 tmpdir);
426 		if ((fd = mkstemp(tempname)) == -1 ||
427 		    (obuf = Fdopen(fd, "w")) == NULL) {
428 			warn("%s", tempname);
429 			relsesigs();
430 			reset(0);
431 		}
432 		if ((ibuf = Fopen(mailname, "r")) == NULL) {
433 			warn("%s", mailname);
434 			Fclose(obuf);
435 			rm(tempname);
436 			relsesigs();
437 			reset(0);
438 		}
439 		fseeko(ibuf, mailsize, SEEK_SET);
440 		while ((c = getc(ibuf)) != EOF)
441 			putc(c, obuf);
442 		Fclose(ibuf);
443 		Fclose(obuf);
444 		if ((ibuf = Fopen(tempname, "r")) == NULL) {
445 			warn("%s", tempname);
446 			rm(tempname);
447 			relsesigs();
448 			reset(0);
449 		}
450 		rm(tempname);
451 	}
452 	printf("\"%s\" ", mailname);
453 	fflush(stdout);
454 	if ((obuf = Fopen(mailname, "r+")) == NULL) {
455 		warn("%s", mailname);
456 		relsesigs();
457 		reset(0);
458 	}
459 	trunc(obuf);
460 	c = 0;
461 	for (mp = &message[0]; mp < &message[msgCount]; mp++) {
462 		if ((mp->m_flag & MDELETED) != 0)
463 			continue;
464 		c++;
465 		if (sendmessage(mp, obuf, NULL, NULL) < 0) {
466 			warnx("%s", mailname);
467 			relsesigs();
468 			reset(0);
469 		}
470 	}
471 	gotcha = (c == 0 && ibuf == NULL);
472 	if (ibuf != NULL) {
473 		while ((c = getc(ibuf)) != EOF)
474 			putc(c, obuf);
475 		Fclose(ibuf);
476 	}
477 	fflush(obuf);
478 	if (ferror(obuf)) {
479 		warn("%s", mailname);
480 		relsesigs();
481 		reset(0);
482 	}
483 	Fclose(obuf);
484 	if (gotcha) {
485 		rm(mailname);
486 		printf("removed\n");
487 	} else
488 		printf("complete\n");
489 	fflush(stdout);
490 
491 done:
492 	relsesigs();
493 }
494