3 * spost.c -- feed messages to sendmail
5 * This is a simpler, faster, replacement for "post" for use
6 * when "sendmail" is the transport system.
10 * This code is Copyright (c) 2002, by the authors of nmh. See the
11 * COPYRIGHT file in the root directory of the nmh distribution for
12 * complete copyright information.
17 #include <h/addrsbr.h>
18 #include <h/aliasbr.h>
19 #include <h/dropsbr.h>
23 #define uptolow(c) ((isalpha(c) && isupper (c)) ? tolower (c) : c)
25 #define MAX_SM_FIELD 1476 /* < largest hdr field sendmail will accept */
26 #define FCCS 10 /* max number of fccs allowed */
28 struct swit switches[] = {
30 { "filter filterfile", 0 },
54 { "alias aliasfile", 0 },
58 { "width columns", 0 },
66 { "dist", -4 }, /* interface from dist */
68 { "check", -5 }, /* interface from whom */
70 { "nocheck", -7 }, /* interface from whom */
72 { "whom", -4 }, /* interface from whom */
73 #define PUSHSW 22 /* fork to sendmail then exit */
75 #define NPUSHSW 23 /* exec sendmail */
78 { "library directory", -7 },
80 { "idanno number", -6 },
85 /* flags for headers->flags */
86 #define HNOP 0x0000 /* just used to keep .set around */
87 #define HBAD 0x0001 /* bad header - don't let it through */
88 #define HADR 0x0002 /* header has an address field */
89 #define HSUB 0x0004 /* Subject: header */
90 #define HTRY 0x0008 /* try to send to addrs on header */
91 #define HBCC 0x0010 /* don't output this header */
92 #define HMNG 0x0020 /* mung this header */
93 #define HNGR 0x0040 /* no groups allowed in this header */
94 #define HFCC 0x0080 /* FCC: type header */
95 #define HNIL 0x0100 /* okay for this header not to have addrs */
96 #define HIGN 0x0200 /* ignore this header */
98 /* flags for headers->set */
99 #define MFRM 0x0001 /* we've seen a From: */
100 #define MDAT 0x0002 /* we've seen a Date: */
101 #define MRFM 0x0004 /* we've seen a Resent-From: */
102 #define MVIS 0x0008 /* we've seen sighted addrs */
103 #define MINV 0x0010 /* we've seen blind addrs */
104 #define MRDT 0x0020 /* we've seen a Resent-Date: */
113 static struct headers NHeaders[] = {
114 { "Return-Path", HBAD, 0 },
115 { "Received", HBAD, 0 },
116 { "Reply-To", HADR|HNGR, 0 },
117 { "From", HADR|HNGR, MFRM },
118 { "Sender", HADR|HBAD, 0 },
119 { "Date", HNOP, MDAT },
120 { "Subject", HSUB, 0 },
121 { "To", HADR|HTRY, MVIS },
122 { "cc", HADR|HTRY, MVIS },
123 { "Bcc", HADR|HTRY|HBCC|HNIL, MINV },
124 { "Message-Id", HBAD, 0 },
129 static struct headers RHeaders[] = {
130 { "Resent-Reply-To", HADR|HNGR, 0 },
131 { "Resent-From", HADR|HNGR, MRFM },
132 { "Resent-Sender", HADR|HBAD, 0 },
133 { "Resent-Date", HNOP, MRDT },
134 { "Resent-Subject", HSUB, 0 },
135 { "Resent-To", HADR|HTRY, MVIS },
136 { "Resent-cc", HADR|HTRY, MVIS },
137 { "Resent-Bcc", HADR|HTRY|HBCC, MINV },
138 { "Resent-Message-Id", HBAD, 0 },
139 { "Resent-Fcc", HFCC, 0 },
140 { "Reply-To", HADR, 0 },
146 static short fccind = 0; /* index into fccfold[] */
148 static int badmsg = 0; /* message has bad semantics */
149 static int verbose = 0; /* spell it out */
150 static int debug = 0; /* debugging post */
151 static int rmflg = 1; /* remove temporary file when done */
152 static int watch = 0; /* watch the delivery process */
153 static int backflg = 0; /* rename input file as *.bak when done */
154 static int whomflg = 0; /* if just checking addresses */
155 static int pushflg = 0; /* if going to fork to sendmail */
156 static int aliasflg = -1; /* if going to process aliases */
157 static int outputlinelen=72;
159 static unsigned msgflags = 0; /* what we've seen */
165 static char tmpfil[] = "/tmp/pstXXXXXX";
167 static char from[BUFSIZ]; /* my network address */
168 static char signature[BUFSIZ]; /* my signature */
169 static char *filter = NULL; /* the filter for BCC'ing */
170 static char *subject = NULL; /* the subject field for BCC'ing */
171 static char *fccfold[FCCS]; /* foldernames for FCC'ing */
173 static struct headers *hdrtab; /* table for the message we're doing */
174 static FILE *out; /* output (temp) file */
176 extern char *sendmail;
179 * external prototypes
181 extern char *getfullname (void);
182 extern char *getusername (void);
187 static void putfmt (char *, char *, FILE *);
188 static void start_headers (void);
189 static void finish_headers (FILE *);
190 static int get_header (char *, struct headers *);
191 static void putadr (char *, struct mailname *);
192 static int putone (char *, int, int);
193 static void insert_fcc (struct headers *, char *);
194 static void file (char *);
195 static void fcc (char *, char *);
198 static void die (char *, char *, ...);
199 static void make_bcc_file (void);
204 main (int argc, char **argv)
206 int state, i, pid, compnum;
207 char *cp, *msg = NULL, **argp, **arguments;
208 char *sargv[16], buf[BUFSIZ], name[NAMESZ];
212 setlocale(LC_ALL, "");
214 invo_name = r1bindex (argv[0], '/');
216 /* foil search of user profile/context */
217 if (context_foil (NULL) == -1)
220 mts_init (invo_name);
221 arguments = getarguments (invo_name, argc, argv, 0);
224 while ((cp = *argp++)) {
226 switch (smatch (++cp, switches)) {
228 ambigsw (cp, switches);
231 adios (NULL, "-%s unknown", cp);
234 snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
235 print_help (buf, switches, 1);
238 print_version(invo_name);
254 if (!(filter = *argp++) || *filter == '-')
255 adios (NULL, "missing argument to %s", argp[-2]);
297 if (!(cp = *argp++) || *cp == '-')
298 adios (NULL, "missing argument to %s", argp[-2]);
300 alias (AliasFile);/* load default aka's */
302 if ((state = alias(cp)) != AK_OK)
303 adios (NULL, "aliasing error in file %s - %s",
304 cp, akerror(state) );
311 if (!(cp = *argp++) || *cp == '-')
312 adios (NULL, "missing argument to %s", argp[-2]);
313 outputlinelen = atoi (cp);
314 if (outputlinelen <= 10)
319 if (!(cp = *argp++) || *cp == '-')
320 adios (NULL, "missing argument to %s", argp[-2]);
321 /* create a minimal context */
322 if (context_foil (cp) == -1)
327 /* -idanno switch ignored */
328 if (!(cp = *argp++) || *cp == '-')
329 adios (NULL, "missing argument to %s", argp[-2]);
334 adios (NULL, "only one message at a time!");
340 alias (AliasFile); /* load default aka's */
343 adios (NULL, "usage: %s [switches] file", invo_name);
345 if ((in = fopen (msg, "r")) == NULL)
346 adios (msg, "unable to open");
355 if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
356 adios (tmpfil, "unable to create");
359 if ((out = fopen (tmpfil, "w")) == NULL)
360 adios (tmpfil, "unable to create");
361 chmod (tmpfil, 0600);
365 hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
367 for (compnum = 1, state = FLD;;) {
368 switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
371 putfmt (name, buf, out);
377 while (state == FLDPLUS) {
378 state = m_getfld (state, name, buf, sizeof(buf), in);
381 putfmt (name, cp, out);
386 finish_headers (out);
387 fprintf (out, "\n%s", buf);
389 while (state == BODY) {
390 state = m_getfld (state, name, buf, sizeof(buf), in);
396 finish_headers (out);
401 adios (NULL, "message format error in component #%d",
405 adios (NULL, "getfld() returned %d", state);
411 if (backflg && !whomflg) {
412 strncpy (buf, m_backup (msg), sizeof(buf));
413 if (rename (msg, buf) == NOTOK)
414 advise (buf, "unable to rename %s to", msg);
426 * re-open the temp file, unlink it and exec sendmail, giving it
427 * the msg temp file as std in.
429 if ( freopen( tmpfil, "r", stdin) == NULL)
430 adios (tmpfil, "can't reopen for sendmail");
435 *argp++ = "send-mail";
436 *argp++ = "-m"; /* send to me too */
437 *argp++ = "-t"; /* read msg for recipients */
438 *argp++ = "-i"; /* don't stop on "." */
441 if (watch || verbose)
445 if (pushflg && !(watch || verbose)) {
446 /* fork to a child to run sendmail */
447 for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
451 fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
452 invo_name, sendmail);
455 /* we're the child .. */
461 execv ( sendmail, sargv);
462 adios ( sendmail, "can't exec");
463 return 0; /* dead code to satisfy the compiler */
466 /* DRAFT GENERATION */
469 putfmt (char *name, char *str, FILE *out)
475 while (*str == ' ' || *str == '\t')
478 if ((i = get_header (name, hdrtab)) == NOTOK) {
479 fprintf (out, "%s: %s", name, str);
484 if (hdr->flags & HIGN)
486 if (hdr->flags & HBAD) {
487 advise (NULL, "illegal header line -- %s:", name);
491 msgflags |= hdr->set;
493 if (hdr->flags & HSUB)
494 subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
496 if (hdr->flags & HFCC) {
497 if ((cp = strrchr(str, '\n')))
499 for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
501 insert_fcc (hdr, pp);
503 insert_fcc (hdr, pp);
508 if (hdr->flags & HBCC) {
514 if (*str != '\n' && *str != '\0') {
515 if (aliasflg && hdr->flags & HTRY) {
516 /* this header contains address(es) that we have to do
517 * alias expansion on. Because of the saved state in
518 * getname we have to put all the addresses into a list.
519 * We then let putadr munch on that list, possibly
522 register struct mailname *f = 0;
523 register struct mailname *mp = 0;
525 while ((cp = getname(str))) {
526 mp = getm( cp, NULL, 0, AD_HOST, NULL);
531 mp->m_next = f->m_next;
536 f = mp->m_next; mp->m_next = 0;
539 /* The author(s) of spost decided that alias substitution wasn't
540 necessary for the non-HTRY headers. Unfortunately, one of those
541 headers is "From:", and having alias substitution work on that is
542 extremely useful for someone with a lot of POP3 email accounts or
543 aliases. post supports aliasing of "From:"...
545 Since "From:"-processing is incompletely implemented in this
546 unsupported and undocumented spost backend, I'm not going to take
547 the time to implement my new draft-From:-based email address
548 masquerading. If I do ever implement it here, I'd almost
549 certainly want to implement "From:" line alias processing as
550 well. -- Dan Harkless <dan-nmh@dilvish.speed.net> */
551 fprintf (out, "%s: %s", name, str );
563 strncpy(from, getusername(), sizeof(from));
565 if ((cp = getfullname ()) && *cp) {
566 strncpy (sigbuf, cp, sizeof(sigbuf));
567 snprintf (signature, sizeof(signature), "%s <%s>", sigbuf, from);
570 snprintf (signature, sizeof(signature), "%s", from);
575 finish_headers (FILE *out)
579 if (!(msgflags & MDAT))
580 fprintf (out, "Date: %s\n", dtimenow (0));
582 fprintf (out, "Sender: %s\n", from);
584 fprintf (out, "From: %s\n", signature);
586 if (!(msgflags & MVIS))
587 fprintf (out, "Bcc: Blind Distribution List: ;\n");
592 if (!(msgflags & MRDT))
593 fprintf (out, "Resent-Date: %s\n", dtimenow(0));
595 fprintf (out, "Resent-Sender: %s\n", from);
597 fprintf (out, "Resent-From: %s\n", signature);
599 if (!(msgflags & MVIS))
600 fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
606 adios (NULL, "re-format message and try again");
611 get_header (char *header, struct headers *table)
615 for (h = table; h->value; h++)
616 if (!strcasecmp (header, h->value))
624 * output the address list for header "name". The address list
625 * is a linked list of mailname structs. "nl" points to the head
626 * of the list. Alias substitution should be done on nl.
629 putadr (char *name, struct mailname *nl)
631 register struct mailname *mp, *mp2;
632 register int linepos;
636 fprintf (out, "%s: ", name);
637 namelen = strlen(name) + 2;
640 for (mp = nl; mp; ) {
641 if (linepos > MAX_SM_FIELD) {
642 fprintf (out, "\n%s: ", name);
646 /* a local name - see if it's an alias */
647 cp = akvalue(mp->m_mbox);
648 if (cp == mp->m_mbox)
649 /* wasn't an alias - use what the user typed */
650 linepos = putone( mp->m_text, linepos, namelen );
652 /* an alias - expand it */
653 while ((cp = getname(cp))) {
654 if (linepos > MAX_SM_FIELD) {
655 fprintf (out, "\n%s: ", name);
658 mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
660 mp2->m_pers = getcpy(mp->m_mbox);
661 linepos = putone( adrformat(mp2), linepos, namelen );
663 linepos = putone( mp2->m_text, linepos, namelen );
668 /* not a local name - use what the user typed */
669 linepos = putone( mp->m_text, linepos, namelen );
679 putone (char *adr, int pos, int indent)
687 else if ( linepos+len > outputlinelen ) {
688 fprintf ( out, ",\n%*s", indent, "");
705 insert_fcc (struct headers *hdr, char *pp)
709 for (cp = pp; isspace (*cp); cp++)
711 for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
719 adios (NULL, "too many %ss", hdr->value);
720 fccfold[fccind++] = getcpy (cp);
735 fd = mkstemp(bccfil);
736 if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
737 adios (bccfil, "unable to create");
740 if ((out = fopen (bccfil, "w")) == NULL)
741 adios (bccfil, "unable to create");
743 chmod (bccfil, 0600);
745 fprintf (out, "Date: %s\n", dtimenow (0));
746 fprintf (out, "From: %s\n", signature);
748 fprintf (out, "Subject: %s", subject);
749 fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
752 if (filter == NULL) {
753 if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
754 adios (NULL, "unable to re-open");
755 cpydgst (fd, fileno (out), tmpfil, bccfil);
759 vec[0] = r1bindex (mhlproc, '/');
761 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
765 adios ("vfork", "unable to");
768 dup2 (fileno (out), 1);
771 vec[i++] = "-forward";
777 execvp (mhlproc, vec);
778 adios (mhlproc, "unable to exec");
781 if (status = pidwait(child_id, OK))
782 admonish (NULL, "%s lost (status=0%o)", vec[0], status);
787 fseek (out, 0L, SEEK_END);
788 fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
793 /* FCC INTERACTION */
803 for (i = 0; i < fccind; i++)
805 printf ("Fcc: %s\n", fccfold[i]);
807 fcc (path, fccfold[i]);
812 fcc (char *file, char *folder)
819 printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
822 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
827 fprintf (stderr, " %sFcc %s: ",
828 msgstate == resent ? "Resent-" : "", folder);
829 fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
833 snprintf (fold, sizeof(fold), "%s%s",
834 *folder == '+' || *folder == '@' ? "" : "+", folder);
835 execlp (fileproc, r1bindex (fileproc, '/'),
836 "-link", "-file", file, fold, NULL);
840 if ((status = pidwait(child_id, OK))) {
842 fprintf (stderr, " %sFcc %s: ",
843 msgstate == resent ? "Resent-" : "", folder);
844 fprintf (verbose ? stdout : stderr,
845 " errored (0%o)\n", status);
860 die (char *what, char *fmt, ...)
865 advertise (what, NULL, fmt, ap);