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.
8 * This code is Copyright (c) 2002, by the authors of nmh. See the
9 * COPYRIGHT file in the root directory of the nmh distribution for
10 * complete copyright information.
15 #include <h/addrsbr.h>
16 #include <h/aliasbr.h>
17 #include <h/dropsbr.h>
22 #define MAX_SM_FIELD 1476 /* < largest hdr field sendmail will accept */
23 #define FCCS 10 /* max number of fccs allowed */
25 struct swit switches[] = {
27 { "filter filterfile", 0 },
51 { "alias aliasfile", 0 },
55 { "width columns", 0 },
63 { "dist", -4 }, /* interface from dist */
65 { "check", -5 }, /* interface from whom */
67 { "nocheck", -7 }, /* interface from whom */
69 { "whom", -4 }, /* interface from whom */
70 #define PUSHSW 22 /* fork to sendmail then exit */
72 #define NPUSHSW 23 /* exec sendmail */
75 { "library directory", -7 },
77 { "idanno number", -6 },
82 /* flags for headers->flags */
83 #define HNOP 0x0000 /* just used to keep .set around */
84 #define HBAD 0x0001 /* bad header - don't let it through */
85 #define HADR 0x0002 /* header has an address field */
86 #define HSUB 0x0004 /* Subject: header */
87 #define HTRY 0x0008 /* try to send to addrs on header */
88 #define HBCC 0x0010 /* don't output this header */
89 #define HMNG 0x0020 /* mung this header */
90 #define HNGR 0x0040 /* no groups allowed in this header */
91 #define HFCC 0x0080 /* FCC: type header */
92 #define HNIL 0x0100 /* okay for this header not to have addrs */
93 #define HIGN 0x0200 /* ignore this header */
95 /* flags for headers->set */
96 #define MFRM 0x0001 /* we've seen a From: */
97 #define MDAT 0x0002 /* we've seen a Date: */
98 #define MRFM 0x0004 /* we've seen a Resent-From: */
99 #define MVIS 0x0008 /* we've seen sighted addrs */
100 #define MINV 0x0010 /* we've seen blind addrs */
101 #define MRDT 0x0020 /* we've seen a Resent-Date: */
110 static struct headers NHeaders[] = {
111 { "Return-Path", HBAD, 0 },
112 { "Received", HBAD, 0 },
113 { "Reply-To", HADR|HNGR, 0 },
114 { "From", HADR|HNGR, MFRM },
115 { "Sender", HADR|HBAD, 0 },
116 { "Date", HNOP, MDAT },
117 { "Subject", HSUB, 0 },
118 { "To", HADR|HTRY, MVIS },
119 { "cc", HADR|HTRY, MVIS },
120 { "Bcc", HADR|HTRY|HBCC|HNIL, MINV },
121 { "Message-Id", HBAD, 0 },
126 static struct headers RHeaders[] = {
127 { "Resent-Reply-To", HADR|HNGR, 0 },
128 { "Resent-From", HADR|HNGR, MRFM },
129 { "Resent-Sender", HADR|HBAD, 0 },
130 { "Resent-Date", HNOP, MRDT },
131 { "Resent-Subject", HSUB, 0 },
132 { "Resent-To", HADR|HTRY, MVIS },
133 { "Resent-cc", HADR|HTRY, MVIS },
134 { "Resent-Bcc", HADR|HTRY|HBCC, MINV },
135 { "Resent-Message-Id", HBAD, 0 },
136 { "Resent-Fcc", HFCC, 0 },
137 { "Reply-To", HADR, 0 },
143 static short fccind = 0; /* index into fccfold[] */
145 static int badmsg = 0; /* message has bad semantics */
146 static int verbose = 0; /* spell it out */
147 static int debug = 0; /* debugging post */
148 static int rmflg = 1; /* remove temporary file when done */
149 static int watch = 0; /* watch the delivery process */
150 static int backflg = 0; /* rename input file as *.bak when done */
151 static int whomflg = 0; /* if just checking addresses */
152 static int pushflg = 0; /* if going to fork to sendmail */
153 static int aliasflg = -1; /* if going to process aliases */
154 static int outputlinelen=72;
156 static unsigned msgflags = 0; /* what we've seen */
162 static char tmpfil[] = "/tmp/pstXXXXXX";
164 static char from[BUFSIZ]; /* my network address */
165 static char signature[BUFSIZ]; /* my signature */
166 static char *filter = NULL; /* the filter for BCC'ing */
167 static char *subject = NULL; /* the subject field for BCC'ing */
168 static char *fccfold[FCCS]; /* foldernames for FCC'ing */
170 static struct headers *hdrtab; /* table for the message we're doing */
171 static FILE *out; /* output (temp) file */
173 extern char *sendmail;
176 * external prototypes
178 extern char *getfullname (void);
179 extern char *getusername (void);
181 extern boolean draft_from_masquerading; /* defined in mts.c */
186 static void putfmt (char *, char *, FILE *);
187 static void start_headers (void);
188 static void finish_headers (FILE *);
189 static int get_header (char *, struct headers *);
190 static void putadr (char *, struct mailname *);
191 static int putone (char *, int, int);
192 static void insert_fcc (struct headers *, unsigned char *);
193 static void file (char *);
194 static void fcc (char *, char *);
197 static void die (char *, char *, ...);
198 static void make_bcc_file (void);
203 main (int argc, char **argv)
205 int state, i, pid, compnum;
206 char *cp, *msg = NULL, **argp, **arguments;
207 char *sargv[16], buf[BUFSIZ], name[NAMESZ];
211 setlocale(LC_ALL, "");
213 invo_name = r1bindex (argv[0], '/');
215 /* foil search of user profile/context */
216 if (context_foil (NULL) == -1)
219 mts_init (invo_name);
220 arguments = getarguments (invo_name, argc, argv, 0);
223 while ((cp = *argp++)) {
225 switch (smatch (++cp, switches)) {
227 ambigsw (cp, switches);
230 adios (NULL, "-%s unknown", cp);
233 snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
234 print_help (buf, switches, 1);
237 print_version(invo_name);
253 if (!(filter = *argp++) || *filter == '-')
254 adios (NULL, "missing argument to %s", argp[-2]);
296 if (!(cp = *argp++) || *cp == '-')
297 adios (NULL, "missing argument to %s", argp[-2]);
299 alias (AliasFile);/* load default aka's */
301 if ((state = alias(cp)) != AK_OK)
302 adios (NULL, "aliasing error in file %s - %s",
303 cp, akerror(state) );
310 if (!(cp = *argp++) || *cp == '-')
311 adios (NULL, "missing argument to %s", argp[-2]);
312 outputlinelen = atoi (cp);
313 if (outputlinelen <= 10)
318 if (!(cp = *argp++) || *cp == '-')
319 adios (NULL, "missing argument to %s", argp[-2]);
320 /* create a minimal context */
321 if (context_foil (cp) == -1)
326 /* -idanno switch ignored */
327 if (!(cp = *argp++) || *cp == '-')
328 adios (NULL, "missing argument to %s", argp[-2]);
333 adios (NULL, "only one message at a time!");
339 alias (AliasFile); /* load default aka's */
342 adios (NULL, "usage: %s [switches] file", invo_name);
344 if ((in = fopen (msg, "r")) == NULL)
345 adios (msg, "unable to open");
354 if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
355 adios (tmpfil, "unable to create");
358 if ((out = fopen (tmpfil, "w")) == NULL)
359 adios (tmpfil, "unable to create");
360 chmod (tmpfil, 0600);
364 hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
366 for (compnum = 1, state = FLD;;) {
367 switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
370 putfmt (name, buf, out);
376 while (state == FLDPLUS) {
377 state = m_getfld (state, name, buf, sizeof(buf), in);
380 putfmt (name, cp, out);
385 finish_headers (out);
386 fprintf (out, "\n%s", buf);
388 while (state == BODY) {
389 state = m_getfld (state, name, buf, sizeof(buf), in);
395 finish_headers (out);
400 adios (NULL, "message format error in component #%d",
404 adios (NULL, "getfld() returned %d", state);
410 if (backflg && !whomflg) {
411 strncpy (buf, m_backup (msg), sizeof(buf));
412 if (rename (msg, buf) == NOTOK)
413 advise (buf, "unable to rename %s to", msg);
425 * re-open the temp file, unlink it and exec sendmail, giving it
426 * the msg temp file as std in.
428 if ( freopen( tmpfil, "r", stdin) == NULL)
429 adios (tmpfil, "can't reopen for sendmail");
434 *argp++ = "send-mail";
435 *argp++ = "-m"; /* send to me too */
436 *argp++ = "-t"; /* read msg for recipients */
437 *argp++ = "-i"; /* don't stop on "." */
440 if (watch || verbose)
444 if (pushflg && !(watch || verbose)) {
445 /* fork to a child to run sendmail */
446 for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
450 fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
451 invo_name, sendmail);
454 /* we're the child .. */
460 execv ( sendmail, sargv);
461 adios ( sendmail, "can't exec");
462 return 0; /* dead code to satisfy the compiler */
465 /* DRAFT GENERATION */
468 putfmt (char *name, char *str, FILE *out)
474 while (*str == ' ' || *str == '\t')
477 if ((i = get_header (name, hdrtab)) == NOTOK) {
478 fprintf (out, "%s: %s", name, str);
483 if (hdr->flags & HIGN)
485 if (hdr->flags & HBAD) {
486 advise (NULL, "illegal header line -- %s:", name);
490 msgflags |= hdr->set;
492 if (hdr->flags & HSUB)
493 subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
495 if (hdr->flags & HFCC) {
496 if ((cp = strrchr(str, '\n')))
498 for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
500 insert_fcc (hdr, pp);
502 insert_fcc (hdr, pp);
507 if (hdr->flags & HBCC) {
513 if (*str != '\n' && *str != '\0') {
514 if (aliasflg && hdr->flags & HTRY) {
515 /* this header contains address(es) that we have to do
516 * alias expansion on. Because of the saved state in
517 * getname we have to put all the addresses into a list.
518 * We then let putadr munch on that list, possibly
521 register struct mailname *f = 0;
522 register struct mailname *mp = 0;
524 while ((cp = getname(str))) {
525 mp = getm( cp, NULL, 0, AD_HOST, NULL);
530 mp->m_next = f->m_next;
535 f = mp->m_next; mp->m_next = 0;
538 /* The author(s) of spost decided that alias substitution wasn't
539 necessary for the non-HTRY headers. Unfortunately, one of those
540 headers is "From:", and having alias substitution work on that is
541 extremely useful for someone with a lot of POP3 email accounts or
542 aliases. post supports aliasing of "From:"...
544 Since "From:"-processing is incompletely implemented in this
545 unsupported and undocumented spost backend, I'm not going to take
546 the time to implement my new draft-From:-based email address
547 masquerading. If I do ever implement it here, I'd almost
548 certainly want to implement "From:" line alias processing as
549 well. -- Dan Harkless <dan-nmh@dilvish.speed.net> */
550 fprintf (out, "%s: %s", name, str );
562 strncpy(from, getusername(), sizeof(from));
564 if ((cp = getfullname ()) && *cp) {
565 strncpy (sigbuf, cp, sizeof(sigbuf));
566 snprintf (signature, sizeof(signature), "%s <%s>", sigbuf, from);
569 snprintf (signature, sizeof(signature), "%s", from);
574 finish_headers (FILE *out)
578 if (!(msgflags & MDAT))
579 fprintf (out, "Date: %s\n", dtimenow (0));
581 if (msgflags & MFRM) {
582 /* There was already a From: in the draft. Don't add one. */
583 if (!draft_from_masquerading)
584 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
585 so we'll reveal the user's actual account@thismachine
586 address in a Sender: header (and use it as the envelope
588 fprintf (out, "Sender: %s\n", from);
591 fprintf (out, "From: %s\n", signature);
594 if (!(msgflags & MVIS))
595 fprintf (out, "Bcc: Blind Distribution List: ;\n");
600 if (!(msgflags & MRDT))
601 fprintf (out, "Resent-Date: %s\n", dtimenow(0));
602 if (msgflags & MRFM) {
603 /* There was already a Resent-From: in draft. Don't add one. */
604 if (!draft_from_masquerading)
605 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
606 so we'll reveal the user's actual account@thismachine
607 address in a Sender: header (and use it as the envelope
609 fprintf (out, "Resent-Sender: %s\n", from);
612 /* Construct a Resent-From: header. */
613 fprintf (out, "Resent-From: %s\n", signature);
615 if (!(msgflags & MVIS))
616 fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
622 adios (NULL, "re-format message and try again");
627 get_header (char *header, struct headers *table)
631 for (h = table; h->value; h++)
632 if (!mh_strcasecmp (header, h->value))
640 * output the address list for header "name". The address list
641 * is a linked list of mailname structs. "nl" points to the head
642 * of the list. Alias substitution should be done on nl.
645 putadr (char *name, struct mailname *nl)
647 register struct mailname *mp, *mp2;
648 register int linepos;
652 fprintf (out, "%s: ", name);
653 namelen = strlen(name) + 2;
656 for (mp = nl; mp; ) {
657 if (linepos > MAX_SM_FIELD) {
658 fprintf (out, "\n%s: ", name);
662 /* a local name - see if it's an alias */
663 cp = akvalue(mp->m_mbox);
664 if (cp == mp->m_mbox)
665 /* wasn't an alias - use what the user typed */
666 linepos = putone( mp->m_text, linepos, namelen );
668 /* an alias - expand it */
669 while ((cp = getname(cp))) {
670 if (linepos > MAX_SM_FIELD) {
671 fprintf (out, "\n%s: ", name);
674 mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
676 mp2->m_pers = getcpy(mp->m_mbox);
677 linepos = putone( adrformat(mp2), linepos, namelen );
679 linepos = putone( mp2->m_text, linepos, namelen );
684 /* not a local name - use what the user typed */
685 linepos = putone( mp->m_text, linepos, namelen );
695 putone (char *adr, int pos, int indent)
703 else if ( linepos+len > outputlinelen ) {
704 fprintf ( out, ",\n%*s", indent, "");
721 insert_fcc (struct headers *hdr, unsigned char *pp)
725 for (cp = pp; isspace (*cp); cp++)
727 for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
735 adios (NULL, "too many %ss", hdr->value);
736 fccfold[fccind++] = getcpy (cp);
751 fd = mkstemp(bccfil);
752 if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
753 adios (bccfil, "unable to create");
756 if ((out = fopen (bccfil, "w")) == NULL)
757 adios (bccfil, "unable to create");
759 chmod (bccfil, 0600);
761 fprintf (out, "Date: %s\n", dtimenow (0));
762 if (msgflags & MFRM) {
763 /* There was already a From: in the draft. Don't add one. */
764 if (!draft_from_masquerading)
765 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
766 so we'll reveal the user's actual account@thismachine
767 address in a Sender: header (and use it as the envelope
769 fprintf (out, "Sender: %s\n", from);
772 /* Construct a From: header. */
773 fprintf (out, "From: %s\n", signature);
775 fprintf (out, "Subject: %s", subject);
776 fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
779 if (filter == NULL) {
780 if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
781 adios (NULL, "unable to re-open");
782 cpydgst (fd, fileno (out), tmpfil, bccfil);
786 vec[0] = r1bindex (mhlproc, '/');
788 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
792 adios ("vfork", "unable to");
795 dup2 (fileno (out), 1);
798 vec[i++] = "-forward";
804 execvp (mhlproc, vec);
805 adios (mhlproc, "unable to exec");
808 if (status = pidwait(child_id, OK))
809 admonish (NULL, "%s lost (status=0%o)", vec[0], status);
814 fseek (out, 0L, SEEK_END);
815 fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
820 /* FCC INTERACTION */
830 for (i = 0; i < fccind; i++)
832 printf ("Fcc: %s\n", fccfold[i]);
834 fcc (path, fccfold[i]);
839 fcc (char *file, char *folder)
846 printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
849 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
854 fprintf (stderr, " %sFcc %s: ",
855 msgstate == resent ? "Resent-" : "", folder);
856 fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
860 snprintf (fold, sizeof(fold), "%s%s",
861 *folder == '+' || *folder == '@' ? "" : "+", folder);
862 execlp (fileproc, r1bindex (fileproc, '/'),
863 "-link", "-file", file, fold, NULL);
867 if ((status = pidwait(child_id, OK))) {
869 fprintf (stderr, " %sFcc %s: ",
870 msgstate == resent ? "Resent-" : "", folder);
871 fprintf (verbose ? stdout : stderr,
872 " errored (0%o)\n", status);
887 die (char *what, char *fmt, ...)
892 advertise (what, NULL, fmt, ap);