Annotation of src/usr.bin/mail/send.c, Revision 1.23
1.23 ! okan 1: /* $OpenBSD: send.c,v 1.22 2009/10/27 23:59:40 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: send.c,v 1.6 1996/06/08 19:48:39 christos Exp $ */
3:
1.1 deraadt 4: /*
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.17 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include "rcv.h"
34: #include "extern.h"
35:
1.15 millert 36: static volatile sig_atomic_t sendsignal; /* Interrupted by a signal? */
37:
1.1 deraadt 38: /*
39: * Mail -- a mail program
40: *
41: * Mail to others.
42: */
43:
44: /*
45: * Send message described by the passed pointer to the
46: * passed output buffer. Return -1 on error.
47: * Adjust the status: field if need be.
48: * If doign is given, suppress ignored header fields.
49: * prefix is a string to prepend to each output line.
50: */
51: int
1.14 millert 52: sendmessage(struct message *mp, FILE *obuf, struct ignoretab *doign,
53: char *prefix)
1.1 deraadt 54: {
1.7 millert 55: int count;
1.9 millert 56: FILE *ibuf;
1.1 deraadt 57: char line[LINESIZE];
1.16 pjanzen 58: char visline[4 * LINESIZE - 3];
1.2 deraadt 59: int ishead, infld, ignoring = 0, dostat, firstline;
1.9 millert 60: char *cp, *cp2;
61: int c = 0;
1.1 deraadt 62: int length;
1.2 deraadt 63: int prefixlen = 0;
1.15 millert 64: int rval;
1.16 pjanzen 65: int dovis;
1.15 millert 66: struct sigaction act, saveint;
67: sigset_t oset;
68:
69: sendsignal = 0;
70: rval = -1;
1.16 pjanzen 71: dovis = isatty(fileno(obuf));
1.15 millert 72: sigemptyset(&act.sa_mask);
73: act.sa_flags = SA_RESTART;
74: act.sa_handler = sendint;
75: (void)sigaction(SIGINT, &act, &saveint);
76: (void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
1.1 deraadt 77:
78: /*
79: * Compute the prefix string, without trailing whitespace
80: */
1.5 millert 81: if (prefix != NULL) {
1.1 deraadt 82: cp2 = 0;
83: for (cp = prefix; *cp; cp++)
84: if (*cp != ' ' && *cp != '\t')
85: cp2 = cp;
86: prefixlen = cp2 == 0 ? 0 : cp2 - prefix + 1;
87: }
88: ibuf = setinput(mp);
89: count = mp->m_size;
90: ishead = 1;
91: dostat = doign == 0 || !isign("status", doign);
92: infld = 0;
93: firstline = 1;
94: /*
95: * Process headers first
96: */
97: while (count > 0 && ishead) {
1.3 millert 98: if (fgets(line, sizeof(line), ibuf) == NULL)
1.1 deraadt 99: break;
100: count -= length = strlen(line);
101: if (firstline) {
1.3 millert 102: /*
1.1 deraadt 103: * First line is the From line, so no headers
104: * there to worry about
105: */
106: firstline = 0;
107: ignoring = doign == ignoreall;
108: } else if (line[0] == '\n') {
109: /*
110: * If line is blank, we've reached end of
111: * headers, so force out status: field
112: * and note that we are no longer in header
113: * fields
114: */
115: if (dostat) {
1.15 millert 116: if (statusput(mp, obuf, prefix) == -1)
117: goto out;
1.1 deraadt 118: dostat = 0;
119: }
120: ishead = 0;
121: ignoring = doign == ignoreall;
122: } else if (infld && (line[0] == ' ' || line[0] == '\t')) {
123: /*
124: * If this line is a continuation (via space or tab)
125: * of a previous header field, just echo it
126: * (unless the field should be ignored).
127: * In other words, nothing to do.
128: */
129: } else {
130: /*
131: * Pick up the header field if we have one.
132: */
1.23 ! okan 133: for (cp = line;
! 134: (c = (unsigned char)*cp++) && c != ':' && !isspace(c); )
1.1 deraadt 135: ;
136: cp2 = --cp;
1.23 ! okan 137: while (isspace((unsigned char)*cp++))
1.1 deraadt 138: ;
139: if (cp[-1] != ':') {
140: /*
141: * Not a header line, force out status:
142: * This happens in uucp style mail where
143: * there are no headers at all.
144: */
145: if (dostat) {
1.15 millert 146: if (statusput(mp, obuf, prefix) == -1)
147: goto out;
1.1 deraadt 148: dostat = 0;
149: }
150: if (doign != ignoreall)
151: /* add blank line */
1.4 millert 152: (void)putc('\n', obuf);
1.1 deraadt 153: ishead = 0;
154: ignoring = 0;
155: } else {
156: /*
157: * If it is an ignored field and
158: * we care about such things, skip it.
159: */
160: *cp2 = 0; /* temporarily null terminate */
161: if (doign && isign(line, doign))
162: ignoring = 1;
1.19 martynas 163: else if (strcasecmp(line, "status") == 0) {
1.1 deraadt 164: /*
165: * If the field is "status," go compute
166: * and print the real Status: field
167: */
168: if (dostat) {
1.15 millert 169: if (statusput(mp, obuf, prefix) == -1)
170: goto out;
1.1 deraadt 171: dostat = 0;
172: }
173: ignoring = 1;
174: } else {
175: ignoring = 0;
176: *cp2 = c; /* restore */
177: }
178: infld = 1;
179: }
180: }
181: if (!ignoring) {
182: /*
183: * Strip trailing whitespace from prefix
184: * if line is blank.
185: */
1.13 millert 186: if (prefix != NULL) {
1.1 deraadt 187: if (length > 1)
188: fputs(prefix, obuf);
189: else
1.4 millert 190: (void)fwrite(prefix, sizeof(*prefix),
1.1 deraadt 191: prefixlen, obuf);
1.13 millert 192: }
1.16 pjanzen 193: if (dovis) {
194: length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH);
195: (void)fwrite(visline, sizeof(*visline), length, obuf);
196: } else
197: (void)fwrite(line, sizeof(*line), length, obuf);
1.1 deraadt 198: if (ferror(obuf))
1.15 millert 199: goto out;
1.1 deraadt 200: }
1.15 millert 201: if (sendsignal == SIGINT)
202: goto out;
1.1 deraadt 203: }
204: /*
205: * Copy out message body
206: */
207: if (doign == ignoreall)
208: count--; /* skip final blank line */
1.13 millert 209: while (count > 0) {
210: if (fgets(line, sizeof(line), ibuf) == NULL) {
211: c = 0;
212: break;
213: }
214: count -= c = strlen(line);
215: if (prefix != NULL) {
1.1 deraadt 216: /*
217: * Strip trailing whitespace from prefix
218: * if line is blank.
219: */
220: if (c > 1)
221: fputs(prefix, obuf);
222: else
1.4 millert 223: (void)fwrite(prefix, sizeof(*prefix),
1.1 deraadt 224: prefixlen, obuf);
225: }
1.13 millert 226: /*
227: * We can't read the record file (or inbox for recipient)
228: * properly with 'From ' lines in the message body (from
229: * forwarded messages or sentences starting with "From "),
230: * so we will prepend those lines with a '>'.
231: */
232: if (strncmp(line, "From ", 5) == 0)
233: (void)fwrite(">", 1, 1, obuf); /* '>' before 'From ' */
1.16 pjanzen 234: if (dovis) {
235: length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH);
236: (void)fwrite(visline, sizeof(*visline), length, obuf);
237: } else
238: (void)fwrite(line, sizeof(*line), c, obuf);
1.15 millert 239: if (ferror(obuf) || sendsignal == SIGINT)
240: goto out;
1.13 millert 241: }
1.1 deraadt 242: if (doign == ignoreall && c > 0 && line[c - 1] != '\n')
243: /* no final blank line */
244: if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF)
1.15 millert 245: goto out;
246: rval = 0;
247: out:
248: sendsignal = 0;
249: (void)sigprocmask(SIG_SETMASK, &oset, NULL);
250: (void)sigaction(SIGINT, &saveint, NULL);
251: return(rval);
1.1 deraadt 252: }
253:
254: /*
255: * Output a reasonable looking status field.
256: */
1.15 millert 257: int
1.14 millert 258: statusput(struct message *mp, FILE *obuf, char *prefix)
1.1 deraadt 259: {
260: char statout[3];
1.9 millert 261: char *cp = statout;
1.1 deraadt 262:
263: if (mp->m_flag & MREAD)
264: *cp++ = 'R';
265: if ((mp->m_flag & MNEW) == 0)
266: *cp++ = 'O';
267: *cp = 0;
1.15 millert 268: if (statout[0]) {
1.1 deraadt 269: fprintf(obuf, "%sStatus: %s\n",
1.5 millert 270: prefix == NULL ? "" : prefix, statout);
1.15 millert 271: return(ferror(obuf) ? -1 : 0);
272: }
273: return(0);
1.1 deraadt 274: }
275:
276: /*
277: * Interface between the argument list and the mail1 routine
278: * which does all the dirty work.
279: */
280: int
1.14 millert 281: mail(struct name *to, struct name *cc, struct name *bcc, struct name *smopts,
282: char *subject)
1.1 deraadt 283: {
284: struct header head;
285:
286: head.h_to = to;
287: head.h_subject = subject;
288: head.h_cc = cc;
289: head.h_bcc = bcc;
290: head.h_smopts = smopts;
291: mail1(&head, 0);
292: return(0);
293: }
294:
295:
296: /*
297: * Send mail to a bunch of user names. The interface is through
298: * the mail routine below.
299: */
300: int
1.14 millert 301: sendmail(void *v)
1.1 deraadt 302: {
1.2 deraadt 303: char *str = v;
1.1 deraadt 304: struct header head;
305:
306: head.h_to = extract(str, GTO);
1.5 millert 307: head.h_subject = NULL;
1.14 millert 308: head.h_cc = NULL;
309: head.h_bcc = NULL;
310: head.h_smopts = NULL;
1.1 deraadt 311: mail1(&head, 0);
312: return(0);
313: }
314:
315: /*
316: * Mail a message on standard input to the people indicated
317: * in the passed header. (Internal interface).
318: */
319: void
1.14 millert 320: mail1(struct header *hp, int printheaders)
1.1 deraadt 321: {
322: char *cp;
1.14 millert 323: pid_t pid;
1.1 deraadt 324: char **namelist;
325: struct name *to;
326: FILE *mtf;
327:
328: /*
329: * Collect user's mail from standard input.
330: * Get the result as mtf.
331: */
332: if ((mtf = collect(hp, printheaders)) == NULL)
333: return;
1.13 millert 334: if (fsize(mtf) == 0) {
1.20 martynas 335: if (value("skipempty") != NULL)
336: goto out;
1.21 martynas 337: if (hp->h_subject == NULL || *hp->h_subject == '\0')
1.3 millert 338: puts("No message, no subject; hope that's ok");
1.1 deraadt 339: else
1.3 millert 340: puts("Null message body; hope that's ok");
1.13 millert 341: }
1.1 deraadt 342: /*
343: * Now, take the user names from the combined
344: * to and cc lists and do all the alias
345: * processing.
346: */
347: senderr = 0;
348: to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc)));
1.14 millert 349: if (to == NULL) {
1.3 millert 350: puts("No recipients specified");
1.1 deraadt 351: senderr++;
352: }
353: /*
354: * Look through the recipient list for names with /'s
355: * in them which we write to as files directly.
356: */
357: to = outof(to, mtf, hp);
358: if (senderr)
359: savedeadletter(mtf);
360: to = elide(to);
361: if (count(to) == 0)
362: goto out;
363: fixhead(hp, to);
364: if ((mtf = infix(hp, mtf)) == NULL) {
1.3 millert 365: fputs(". . . message lost, sorry.\n", stderr);
1.1 deraadt 366: return;
367: }
1.12 mickey 368: namelist = unpack(hp->h_smopts, to);
1.1 deraadt 369: if (debug) {
370: char **t;
371:
1.3 millert 372: fputs("Sendmail arguments:", stdout);
1.5 millert 373: for (t = namelist; *t != NULL; t++)
1.1 deraadt 374: printf(" \"%s\"", *t);
1.3 millert 375: putchar('\n');
1.1 deraadt 376: goto out;
377: }
1.5 millert 378: if ((cp = value("record")) != NULL)
1.4 millert 379: (void)savemail(expand(cp), mtf);
1.1 deraadt 380: /*
381: * Fork, set up the temporary mail file as standard
382: * input for "mail", and exec with the user list we generated
383: * far above.
384: */
385: pid = fork();
386: if (pid == -1) {
1.3 millert 387: warn("fork");
1.1 deraadt 388: savedeadletter(mtf);
389: goto out;
390: }
391: if (pid == 0) {
1.2 deraadt 392: sigset_t nset;
1.6 millert 393:
1.2 deraadt 394: sigemptyset(&nset);
395: sigaddset(&nset, SIGHUP);
396: sigaddset(&nset, SIGINT);
397: sigaddset(&nset, SIGQUIT);
398: sigaddset(&nset, SIGTSTP);
399: sigaddset(&nset, SIGTTIN);
400: sigaddset(&nset, SIGTTOU);
401: prepare_child(&nset, fileno(mtf), -1);
1.5 millert 402: if ((cp = value("sendmail")) != NULL)
1.1 deraadt 403: cp = expand(cp);
404: else
405: cp = _PATH_SENDMAIL;
406: execv(cp, namelist);
1.11 millert 407: warn("%s", cp);
1.1 deraadt 408: _exit(1);
409: }
1.5 millert 410: if (value("verbose") != NULL)
1.4 millert 411: (void)wait_child(pid);
1.1 deraadt 412: else
413: free_child(pid);
414: out:
1.3 millert 415: (void)Fclose(mtf);
1.1 deraadt 416: }
417:
418: /*
419: * Fix the header by glopping all of the expanded names from
420: * the distribution list into the appropriate fields.
421: */
422: void
1.14 millert 423: fixhead(struct header *hp, struct name *tolist)
1.1 deraadt 424: {
1.9 millert 425: struct name *np;
1.1 deraadt 426:
1.14 millert 427: hp->h_to = NULL;
428: hp->h_cc = NULL;
429: hp->h_bcc = NULL;
430: for (np = tolist; np != NULL; np = np->n_flink)
1.1 deraadt 431: if ((np->n_type & GMASK) == GTO)
432: hp->h_to =
433: cat(hp->h_to, nalloc(np->n_name, np->n_type));
434: else if ((np->n_type & GMASK) == GCC)
435: hp->h_cc =
436: cat(hp->h_cc, nalloc(np->n_name, np->n_type));
437: else if ((np->n_type & GMASK) == GBCC)
438: hp->h_bcc =
439: cat(hp->h_bcc, nalloc(np->n_name, np->n_type));
440: }
441:
442: /*
443: * Prepend a header in front of the collected stuff
444: * and return the new file.
445: */
446: FILE *
1.14 millert 447: infix(struct header *hp, FILE *fi)
1.1 deraadt 448: {
1.9 millert 449: FILE *nfo, *nfi;
1.8 millert 450: int c, fd;
451: char tempname[PATHSIZE];
1.1 deraadt 452:
1.8 millert 453: (void)snprintf(tempname, sizeof(tempname),
454: "%s/mail.RsXXXXXXXXXX", tmpdir);
455: if ((fd = mkstemp(tempname)) == -1 ||
456: (nfo = Fdopen(fd, "w")) == NULL) {
1.11 millert 457: warn("%s", tempname);
1.1 deraadt 458: return(fi);
459: }
1.8 millert 460: if ((nfi = Fopen(tempname, "r")) == NULL) {
1.11 millert 461: warn("%s", tempname);
1.3 millert 462: (void)Fclose(nfo);
1.8 millert 463: (void)rm(tempname);
1.1 deraadt 464: return(fi);
465: }
1.8 millert 466: (void)rm(tempname);
1.4 millert 467: (void)puthead(hp, nfo, GTO|GSUBJECT|GCC|GBCC|GNL|GCOMMA);
1.1 deraadt 468: c = getc(fi);
469: while (c != EOF) {
1.4 millert 470: (void)putc(c, nfo);
1.1 deraadt 471: c = getc(fi);
472: }
473: if (ferror(fi)) {
1.3 millert 474: warn("read");
1.1 deraadt 475: rewind(fi);
476: return(fi);
477: }
1.4 millert 478: (void)fflush(nfo);
1.1 deraadt 479: if (ferror(nfo)) {
1.11 millert 480: warn("%s", tempname);
1.3 millert 481: (void)Fclose(nfo);
482: (void)Fclose(nfi);
1.1 deraadt 483: rewind(fi);
484: return(fi);
485: }
1.3 millert 486: (void)Fclose(nfo);
487: (void)Fclose(fi);
1.1 deraadt 488: rewind(nfi);
489: return(nfi);
490: }
491:
492: /*
493: * Dump the to, subject, cc header on the
494: * passed file buffer.
495: */
496: int
1.14 millert 497: puthead(struct header *hp, FILE *fo, int w)
1.1 deraadt 498: {
1.9 millert 499: int gotcha;
1.1 deraadt 500:
501: gotcha = 0;
1.14 millert 502: if (hp->h_to != NULL && w & GTO)
1.1 deraadt 503: fmt("To:", hp->h_to, fo, w&GCOMMA), gotcha++;
1.5 millert 504: if (hp->h_subject != NULL && w & GSUBJECT)
1.1 deraadt 505: fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;
1.14 millert 506: if (hp->h_cc != NULL && w & GCC)
1.1 deraadt 507: fmt("Cc:", hp->h_cc, fo, w&GCOMMA), gotcha++;
1.14 millert 508: if (hp->h_bcc != NULL && w & GBCC)
1.1 deraadt 509: fmt("Bcc:", hp->h_bcc, fo, w&GCOMMA), gotcha++;
510: if (gotcha && w & GNL)
1.4 millert 511: (void)putc('\n', fo);
1.1 deraadt 512: return(0);
513: }
514:
515: /*
516: * Format the given header line to not exceed 72 characters.
517: */
518: void
1.14 millert 519: fmt(char *str, struct name *np, FILE *fo, int comma)
1.1 deraadt 520: {
1.9 millert 521: int col, len;
1.1 deraadt 522:
523: comma = comma ? 1 : 0;
524: col = strlen(str);
525: if (col)
526: fputs(str, fo);
1.14 millert 527: for (; np != NULL; np = np->n_flink) {
528: if (np->n_flink == NULL)
1.1 deraadt 529: comma = 0;
530: len = strlen(np->n_name);
531: col++; /* for the space */
532: if (col + len + comma > 72 && col > 4) {
533: fputs("\n ", fo);
534: col = 4;
535: } else
536: putc(' ', fo);
537: fputs(np->n_name, fo);
538: if (comma)
539: putc(',', fo);
540: col += len + comma;
541: }
542: putc('\n', fo);
543: }
544:
545: /*
546: * Save the outgoing mail on the passed file.
547: */
548: /*ARGSUSED*/
549: int
1.14 millert 550: savemail(char *name, FILE *fi)
1.1 deraadt 551: {
1.9 millert 552: FILE *fo;
1.1 deraadt 553: char buf[BUFSIZ];
1.2 deraadt 554: time_t now;
1.18 millert 555: mode_t m;
1.1 deraadt 556:
1.18 millert 557: m = umask(077);
558: fo = Fopen(name, "a");
559: (void)umask(m);
560: if (fo == NULL) {
1.11 millert 561: warn("%s", name);
1.3 millert 562: return(-1);
1.1 deraadt 563: }
1.4 millert 564: (void)time(&now);
1.1 deraadt 565: fprintf(fo, "From %s %s", myname, ctime(&now));
1.13 millert 566: while (fgets(buf, sizeof(buf), fi) == buf) {
567: /*
568: * We can't read the record file (or inbox for recipient)
569: * in the message body (from forwarded messages or sentences
570: * starting with "From "), so we will prepend those lines with
571: * a '>'.
572: */
573: if (strncmp(buf, "From ", 5) == 0)
574: (void)fwrite(">", 1, 1, fo); /* '>' before 'From ' */
575: (void)fwrite(buf, 1, strlen(buf), fo);
576: }
1.4 millert 577: (void)putc('\n', fo);
578: (void)fflush(fo);
1.1 deraadt 579: if (ferror(fo))
1.11 millert 580: warn("%s", name);
1.3 millert 581: (void)Fclose(fo);
1.1 deraadt 582: rewind(fi);
1.3 millert 583: return(0);
1.15 millert 584: }
585:
586: /*ARGSUSED*/
587: void
588: sendint(int s)
589: {
590:
591: sendsignal = s;
1.1 deraadt 592: }
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