2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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34 static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 * Mail -- a mail program
43 * Collect input from standard input, handling
52 * Read a message from standard input and return a read file to it
57 * The following hokiness with global variables is so that on
58 * receipt of an interrupt signal, the partial message can be salted
59 * away on dead.letter.
62 static sig_t saveint; /* Previous SIGINT value */
63 static sig_t savehup; /* Previous SIGHUP value */
64 static sig_t savetstp; /* Previous SIGTSTP value */
65 static sig_t savettou; /* Previous SIGTTOU value */
66 static sig_t savettin; /* Previous SIGTTIN value */
67 static FILE *collf; /* File for saving away */
68 static int hadintr; /* Have seen one SIGINT so far */
70 static jmp_buf colljmp; /* To get back to work */
71 static int colljmp_p; /* whether to long jump */
72 static jmp_buf collabort; /* To end collection with error */
75 collect(struct header *hp, int printheaders)
78 int lc, cc, escape, eofcount, fd, c, t;
79 char linebuf[LINESIZE], tempname[PATHSIZE], *cp, getsub;
81 int longline, lastlong, rc; /* So we don't make 2 or more lines
82 out of a long input line. */
86 * Start catching signals from here, but we're still die on interrupts
87 * until we're in the main loop.
89 (void)sigemptyset(&nset);
90 (void)sigaddset(&nset, SIGINT);
91 (void)sigaddset(&nset, SIGHUP);
92 (void)sigprocmask(SIG_BLOCK, &nset, NULL);
93 if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
94 (void)signal(SIGINT, collint);
95 if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN)
96 (void)signal(SIGHUP, collhup);
97 savetstp = signal(SIGTSTP, collstop);
98 savettou = signal(SIGTTOU, collstop);
99 savettin = signal(SIGTTIN, collstop);
100 if (setjmp(collabort) || setjmp(colljmp)) {
104 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
107 (void)snprintf(tempname, sizeof(tempname),
108 "%s/mail.RsXXXXXXXXXX", tmpdir);
109 if ((fd = mkstemp(tempname)) == -1 ||
110 (collf = Fdopen(fd, "w+")) == NULL) {
111 warn("%s", tempname);
117 * If we are going to prompt for a subject,
118 * refrain from printing a newline after
119 * the headers (since some people mind).
121 t = GTO|GSUBJECT|GCC|GNL;
123 if (hp->h_subject == NULL && value("interactive") != NULL &&
124 (value("ask") != NULL || value("asksub") != NULL))
127 puthead(hp, stdout, t);
128 (void)fflush(stdout);
130 if ((cp = value("escape")) != NULL)
138 if (!setjmp(colljmp)) {
143 * Come here for printing the after-signal message.
144 * Duplicate messages won't be printed because
145 * the write is aborted if we get a SIGTTOU.
149 (void)fflush(stdout);
151 "\n(Interrupt -- one more to kill letter)\n");
153 printf("(continue)\n");
154 (void)fflush(stdout);
159 c = readline(stdin, linebuf, LINESIZE);
162 if (value("interactive") != NULL &&
163 value("ignoreeof") != NULL && ++eofcount < 25) {
164 printf("Use \".\" to terminate letter\n");
170 longline = c == LINESIZE - 1;
173 if (linebuf[0] == '.' && linebuf[1] == '\0' &&
174 value("interactive") != NULL && !lastlong &&
175 (value("dot") != NULL || value("ignoreeof") != NULL))
177 if (linebuf[0] != escape || value("interactive") == NULL ||
179 if (putline(collf, linebuf, !longline) < 0)
187 * On double escape, just send the single one.
188 * Otherwise, it's an error.
191 if (putline(collf, &linebuf[1], !longline) < 0)
196 printf("Unknown tilde escape.\n");
206 * Shell escape, send the balance of the
214 * Escape to command mode, but be nice!
216 execute(&linebuf[2], 1);
220 * Simulate end of file on input.
225 * Force a quit of sending mail.
226 * Act like an interrupt happened.
233 * Exit, do not save in dead.letter.
238 * Grab a bunch of headers.
240 grabh(hp, GTO|GSUBJECT|GCC|GBCC);
244 * Add to the To list.
246 hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO));
250 * Set the Subject line.
253 while (isspace((unsigned char)*cp))
255 hp->h_subject = savestr(cp);
259 * Set the Reply-To line.
262 while (isspace((unsigned char)*cp))
264 hp->h_replyto = savestr(cp);
268 * Add to the CC list.
270 hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC));
274 * Add to the BCC list.
276 hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC));
282 * Insert named variable in message.
287 while(isspace((unsigned char)*cp))
300 if(*cp != '\0' && (cp = value(cp)) != NULL) {
302 if(putline(collf, cp, 1) < 0)
309 * Read in the dead letter file.
311 if (strlcpy(linebuf + 2, getdeadletter(),
313 >= sizeof(linebuf) - 2) {
314 printf("Line buffer overflow\n");
322 * Search for the file name,
323 * then open it and copy the contents to collf.
326 while (isspace((unsigned char)*cp))
329 printf("Interpolate what file?\n");
337 * Insert stdout of command.
340 int nullfd, tempfd, rc;
341 char tempname2[PATHSIZE];
343 if ((nullfd = open(_PATH_DEVNULL, O_RDONLY, 0))
349 (void)snprintf(tempname2, sizeof(tempname2),
350 "%s/mail.ReXXXXXXXXXX", tmpdir);
351 if ((tempfd = mkstemp(tempname2)) == -1 ||
352 (fbuf = Fdopen(tempfd, "w+")) == NULL) {
353 warn("%s", tempname2);
356 (void)unlink(tempname2);
358 if ((sh = value("SHELL")) == NULL)
361 rc = run_command(sh, 0, nullfd, fileno(fbuf),
371 if (fsize(fbuf) == 0) {
373 "No bytes from command \"%s\"\n",
380 } else if (isdir(cp)) {
381 printf("%s: Directory\n", cp);
383 } else if ((fbuf = Fopen(cp, "r")) == NULL) {
387 printf("\"%s\" ", cp);
388 (void)fflush(stdout);
391 while ((rc = readline(fbuf, linebuf, LINESIZE)) >= 0) {
392 if (rc != LINESIZE - 1)
394 if ((t = putline(collf, linebuf,
395 rc != LINESIZE - 1)) < 0) {
402 printf("%d/%d\n", lc, cc);
406 * Write the message on a file.
409 while (*cp == ' ' || *cp == '\t')
412 fprintf(stderr, "Write what file!?\n");
415 if ((cp = expand(cp)) == NULL)
418 exwrite(cp, collf, 1);
425 * Interpolate the named messages, if we
426 * are in receiving mail mode. Does the
427 * standard list processing garbage.
428 * If ~f is given, we don't shift over.
430 if (forward(linebuf + 2, collf, tempname, c) < 0)
434 if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) {
435 warn("%s", _PATH_TILDE);
438 while ((t = getc(fbuf)) != EOF)
444 * Print out the current state of the
445 * message without altering anything.
448 printf("-------\nMessage contains:\n");
449 puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL);
450 while ((t = getc(collf)) != EOF)
455 * Pipe message through command.
456 * Collect output as new message.
459 mespipe(collf, &linebuf[2]);
464 * Edit the current message.
465 * 'e' means to use EDITOR
466 * 'v' means to use VISUAL
483 (void)sigprocmask(SIG_BLOCK, &nset, NULL);
484 (void)signal(SIGINT, saveint);
485 (void)signal(SIGHUP, savehup);
486 (void)signal(SIGTSTP, savetstp);
487 (void)signal(SIGTTOU, savettou);
488 (void)signal(SIGTTIN, savettin);
489 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
494 * Write a file, ex-like if f set.
497 exwrite(char name[], FILE *fp, int f)
505 printf("\"%s\" ", name);
506 (void)fflush(stdout);
508 if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) {
510 fprintf(stderr, "%s: ", name);
511 fprintf(stderr, "File exists\n");
514 if ((of = Fopen(name, "w")) == NULL) {
520 while ((c = getc(fp)) != EOF) {
532 printf("%d/%ld\n", lc, cc);
533 (void)fflush(stdout);
538 * Edit the message being collected on fp.
539 * On return, make the edit file the new temp file.
542 mesedit(FILE *fp, int c)
544 sig_t sigint = signal(SIGINT, SIG_IGN);
545 FILE *nf = run_editor(fp, (off_t)-1, c, 0);
548 (void)fseeko(nf, (off_t)0, SEEK_END);
552 (void)signal(SIGINT, sigint);
556 * Pipe the message through the command.
557 * Old message is on stdin of command;
558 * New message collected from stdout.
559 * Sh -c must return 0 to accept the new message.
562 mespipe(FILE *fp, char cmd[])
566 sig_t sigint = signal(SIGINT, SIG_IGN);
567 char *sh, tempname[PATHSIZE];
569 (void)snprintf(tempname, sizeof(tempname),
570 "%s/mail.ReXXXXXXXXXX", tmpdir);
571 if ((fd = mkstemp(tempname)) == -1 ||
572 (nf = Fdopen(fd, "w+")) == NULL) {
573 warn("%s", tempname);
578 * stdin = current message.
579 * stdout = new message.
581 if ((sh = value("SHELL")) == NULL)
584 0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
588 if (fsize(nf) == 0) {
589 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
596 (void)fseeko(nf, (off_t)0, SEEK_END);
600 (void)signal(SIGINT, sigint);
604 * Interpolate the named messages into the current
605 * message, preceding each line with a tab.
606 * Return a count of the number of characters now in
607 * the message, or -1 if an error is encountered writing
608 * the message temporary. The flag argument is 'm' if we
609 * should shift over and 'f' if not.
612 forward(char ms[], FILE *fp, char *fn, int f)
615 struct ignoretab *ig;
618 msgvec = (int *)salloc((msgCount+1) * sizeof(*msgvec));
621 if (getmsglist(ms, msgvec, 0) < 0)
624 *msgvec = first(0, MMNORM);
626 printf("No appropriate messages\n");
631 if (f == 'f' || f == 'F')
633 else if ((tabst = value("indentprefix")) == NULL)
635 ig = isupper((unsigned char)f) ? NULL : ignore;
636 printf("Interpolating:");
637 for (; *msgvec != 0; msgvec++) {
638 struct message *mp = message + *msgvec - 1;
641 printf(" %d", *msgvec);
642 if (sendmessage(mp, fp, ig, tabst) < 0) {
652 * Print (continue) when continued after ^Z.
658 sig_t old_action = signal(s, SIG_DFL);
661 (void)sigemptyset(&nset);
662 (void)sigaddset(&nset, s);
663 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
665 (void)sigprocmask(SIG_BLOCK, &nset, NULL);
666 (void)signal(s, old_action);
675 * On interrupt, come here to save the partial message in ~/dead.letter.
676 * Then jump out of the collection loop.
680 collint(int s __unused)
683 * the control flow is subtle, because we can be called from ~q.
686 if (value("ignore") != NULL) {
688 (void)fflush(stdout);
696 if (value("nosave") == NULL)
697 savedeadletter(collf);
698 longjmp(collabort, 1);
703 collhup(int s __unused)
706 savedeadletter(collf);
708 * Let's pretend nobody else wants to clean up,
709 * a true statement at this time.
715 savedeadletter(FILE *fp)
723 cp = getdeadletter();
725 dbuf = Fopen(cp, "a");
729 while ((c = getc(fp)) != EOF)