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>
24 #define MAX_SM_FIELD 1476 /* < largest hdr field sendmail will accept */
25 #define FCCS 10 /* max number of fccs allowed */
27 struct swit switches[] = {
29 { "filter filterfile", 0 },
53 { "alias aliasfile", 0 },
57 { "width columns", 0 },
65 { "dist", -4 }, /* interface from dist */
67 { "check", -5 }, /* interface from whom */
69 { "nocheck", -7 }, /* interface from whom */
71 { "whom", -4 }, /* interface from whom */
72 #define PUSHSW 22 /* fork to sendmail then exit */
74 #define NPUSHSW 23 /* exec sendmail */
77 { "library directory", -7 },
79 { "idanno number", -6 },
84 /* flags for headers->flags */
85 #define HNOP 0x0000 /* just used to keep .set around */
86 #define HBAD 0x0001 /* bad header - don't let it through */
87 #define HADR 0x0002 /* header has an address field */
88 #define HSUB 0x0004 /* Subject: header */
89 #define HTRY 0x0008 /* try to send to addrs on header */
90 #define HBCC 0x0010 /* don't output this header */
91 #define HMNG 0x0020 /* mung this header */
92 #define HNGR 0x0040 /* no groups allowed in this header */
93 #define HFCC 0x0080 /* FCC: type header */
94 #define HNIL 0x0100 /* okay for this header not to have addrs */
95 #define HIGN 0x0200 /* ignore this header */
97 /* flags for headers->set */
98 #define MFRM 0x0001 /* we've seen a From: */
99 #define MDAT 0x0002 /* we've seen a Date: */
100 #define MRFM 0x0004 /* we've seen a Resent-From: */
101 #define MVIS 0x0008 /* we've seen sighted addrs */
102 #define MINV 0x0010 /* we've seen blind addrs */
103 #define MRDT 0x0020 /* we've seen a Resent-Date: */
112 static struct headers NHeaders[] = {
113 { "Return-Path", HBAD, 0 },
114 { "Received", HBAD, 0 },
115 { "Reply-To", HADR|HNGR, 0 },
116 { "From", HADR|HNGR, MFRM },
117 { "Sender", HADR|HBAD, 0 },
118 { "Date", HNOP, MDAT },
119 { "Subject", HSUB, 0 },
120 { "To", HADR|HTRY, MVIS },
121 { "cc", HADR|HTRY, MVIS },
122 { "Bcc", HADR|HTRY|HBCC|HNIL, MINV },
123 { "Message-Id", HBAD, 0 },
128 static struct headers RHeaders[] = {
129 { "Resent-Reply-To", HADR|HNGR, 0 },
130 { "Resent-From", HADR|HNGR, MRFM },
131 { "Resent-Sender", HADR|HBAD, 0 },
132 { "Resent-Date", HNOP, MRDT },
133 { "Resent-Subject", HSUB, 0 },
134 { "Resent-To", HADR|HTRY, MVIS },
135 { "Resent-cc", HADR|HTRY, MVIS },
136 { "Resent-Bcc", HADR|HTRY|HBCC, MINV },
137 { "Resent-Message-Id", HBAD, 0 },
138 { "Resent-Fcc", HFCC, 0 },
139 { "Reply-To", HADR, 0 },
145 static short fccind = 0; /* index into fccfold[] */
147 static int badmsg = 0; /* message has bad semantics */
148 static int verbose = 0; /* spell it out */
149 static int debug = 0; /* debugging post */
150 static int rmflg = 1; /* remove temporary file when done */
151 static int watch = 0; /* watch the delivery process */
152 static int backflg = 0; /* rename input file as *.bak when done */
153 static int whomflg = 0; /* if just checking addresses */
154 static int pushflg = 0; /* if going to fork to sendmail */
155 static int aliasflg = -1; /* if going to process aliases */
156 static int outputlinelen=72;
158 static unsigned msgflags = 0; /* what we've seen */
164 static char tmpfil[] = "/tmp/pstXXXXXX";
166 static char from[BUFSIZ]; /* my network address */
167 static char signature[BUFSIZ]; /* my signature */
168 static char *filter = NULL; /* the filter for BCC'ing */
169 static char *subject = NULL; /* the subject field for BCC'ing */
170 static char *fccfold[FCCS]; /* foldernames for FCC'ing */
172 static struct headers *hdrtab; /* table for the message we're doing */
173 static FILE *out; /* output (temp) file */
175 extern char *sendmail;
178 * external prototypes
180 extern char *getfullname (void);
181 extern char *getusername (void);
183 extern boolean draft_from_masquerading; /* defined in mts.c */
188 static void putfmt (char *, char *, FILE *);
189 static void start_headers (void);
190 static void finish_headers (FILE *);
191 static int get_header (char *, struct headers *);
192 static void putadr (char *, struct mailname *);
193 static int putone (char *, int, int);
194 static void insert_fcc (struct headers *, unsigned char *);
195 static void file (char *);
196 static void fcc (char *, char *);
199 static void die (char *, char *, ...);
200 static void make_bcc_file (void);
205 main (int argc, char **argv)
207 int state, i, pid, compnum;
208 char *cp, *msg = NULL, **argp, **arguments;
209 char *sargv[16], buf[BUFSIZ], name[NAMESZ];
213 setlocale(LC_ALL, "");
215 invo_name = r1bindex (argv[0], '/');
217 /* foil search of user profile/context */
218 if (context_foil (NULL) == -1)
221 mts_init (invo_name);
222 arguments = getarguments (invo_name, argc, argv, 0);
225 while ((cp = *argp++)) {
227 switch (smatch (++cp, switches)) {
229 ambigsw (cp, switches);
232 adios (NULL, "-%s unknown", cp);
235 snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
236 print_help (buf, switches, 1);
239 print_version(invo_name);
255 if (!(filter = *argp++) || *filter == '-')
256 adios (NULL, "missing argument to %s", argp[-2]);
298 if (!(cp = *argp++) || *cp == '-')
299 adios (NULL, "missing argument to %s", argp[-2]);
301 alias (AliasFile);/* load default aka's */
303 if ((state = alias(cp)) != AK_OK)
304 adios (NULL, "aliasing error in file %s - %s",
305 cp, akerror(state) );
312 if (!(cp = *argp++) || *cp == '-')
313 adios (NULL, "missing argument to %s", argp[-2]);
314 outputlinelen = atoi (cp);
315 if (outputlinelen <= 10)
320 if (!(cp = *argp++) || *cp == '-')
321 adios (NULL, "missing argument to %s", argp[-2]);
322 /* create a minimal context */
323 if (context_foil (cp) == -1)
328 /* -idanno switch ignored */
329 if (!(cp = *argp++) || *cp == '-')
330 adios (NULL, "missing argument to %s", argp[-2]);
335 adios (NULL, "only one message at a time!");
341 alias (AliasFile); /* load default aka's */
344 adios (NULL, "usage: %s [switches] file", invo_name);
346 if ((in = fopen (msg, "r")) == NULL)
347 adios (msg, "unable to open");
356 if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
357 adios (tmpfil, "unable to create");
360 if ((out = fopen (tmpfil, "w")) == NULL)
361 adios (tmpfil, "unable to create");
362 chmod (tmpfil, 0600);
366 hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
368 for (compnum = 1, state = FLD;;) {
369 switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
372 putfmt (name, buf, out);
378 while (state == FLDPLUS) {
379 state = m_getfld (state, name, buf, sizeof(buf), in);
382 putfmt (name, cp, out);
387 finish_headers (out);
388 fprintf (out, "\n%s", buf);
390 while (state == BODY) {
391 state = m_getfld (state, name, buf, sizeof(buf), in);
397 finish_headers (out);
402 adios (NULL, "message format error in component #%d",
406 adios (NULL, "getfld() returned %d", state);
412 if (backflg && !whomflg) {
413 strncpy (buf, m_backup (msg), sizeof(buf));
414 if (rename (msg, buf) == NOTOK)
415 advise (buf, "unable to rename %s to", msg);
427 * re-open the temp file, unlink it and exec sendmail, giving it
428 * the msg temp file as std in.
430 if ( freopen( tmpfil, "r", stdin) == NULL)
431 adios (tmpfil, "can't reopen for sendmail");
436 *argp++ = "send-mail";
437 *argp++ = "-m"; /* send to me too */
438 *argp++ = "-t"; /* read msg for recipients */
439 *argp++ = "-i"; /* don't stop on "." */
442 if (watch || verbose)
446 if (pushflg && !(watch || verbose)) {
447 /* fork to a child to run sendmail */
448 for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
452 fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
453 invo_name, sendmail);
456 /* we're the child .. */
462 execv ( sendmail, sargv);
463 adios ( sendmail, "can't exec");
464 return 0; /* dead code to satisfy the compiler */
467 /* DRAFT GENERATION */
470 putfmt (char *name, char *str, FILE *out)
476 while (*str == ' ' || *str == '\t')
479 if ((i = get_header (name, hdrtab)) == NOTOK) {
480 fprintf (out, "%s: %s", name, str);
485 if (hdr->flags & HIGN)
487 if (hdr->flags & HBAD) {
488 advise (NULL, "illegal header line -- %s:", name);
492 msgflags |= hdr->set;
494 if (hdr->flags & HSUB)
495 subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
497 if (hdr->flags & HFCC) {
498 if ((cp = strrchr(str, '\n')))
500 for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
502 insert_fcc (hdr, pp);
504 insert_fcc (hdr, pp);
509 if (hdr->flags & HBCC) {
515 if (*str != '\n' && *str != '\0') {
516 if (aliasflg && hdr->flags & HTRY) {
517 /* this header contains address(es) that we have to do
518 * alias expansion on. Because of the saved state in
519 * getname we have to put all the addresses into a list.
520 * We then let putadr munch on that list, possibly
523 register struct mailname *f = 0;
524 register struct mailname *mp = 0;
526 while ((cp = getname(str))) {
527 mp = getm( cp, NULL, 0, AD_HOST, NULL);
532 mp->m_next = f->m_next;
537 f = mp->m_next; mp->m_next = 0;
540 /* The author(s) of spost decided that alias substitution wasn't
541 necessary for the non-HTRY headers. Unfortunately, one of those
542 headers is "From:", and having alias substitution work on that is
543 extremely useful for someone with a lot of POP3 email accounts or
544 aliases. post supports aliasing of "From:"...
546 Since "From:"-processing is incompletely implemented in this
547 unsupported and undocumented spost backend, I'm not going to take
548 the time to implement my new draft-From:-based email address
549 masquerading. If I do ever implement it here, I'd almost
550 certainly want to implement "From:" line alias processing as
551 well. -- Dan Harkless <dan-nmh@dilvish.speed.net> */
552 fprintf (out, "%s: %s", name, str );
564 strncpy(from, getusername(), sizeof(from));
566 if ((cp = getfullname ()) && *cp) {
567 strncpy (sigbuf, cp, sizeof(sigbuf));
568 snprintf (signature, sizeof(signature), "%s <%s>", sigbuf, from);
571 snprintf (signature, sizeof(signature), "%s", from);
576 finish_headers (FILE *out)
580 if (!(msgflags & MDAT))
581 fprintf (out, "Date: %s\n", dtimenow (0));
583 if (msgflags & MFRM) {
584 /* There was already a From: in the draft. Don't add one. */
585 if (!draft_from_masquerading)
586 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
587 so we'll reveal the user's actual account@thismachine
588 address in a Sender: header (and use it as the envelope
590 fprintf (out, "Sender: %s\n", from);
593 fprintf (out, "From: %s\n", signature);
596 if (!(msgflags & MVIS))
597 fprintf (out, "Bcc: Blind Distribution List: ;\n");
602 if (!(msgflags & MRDT))
603 fprintf (out, "Resent-Date: %s\n", dtimenow(0));
604 if (msgflags & MRFM) {
605 /* There was already a Resent-From: in draft. Don't add one. */
606 if (!draft_from_masquerading)
607 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
608 so we'll reveal the user's actual account@thismachine
609 address in a Sender: header (and use it as the envelope
611 fprintf (out, "Resent-Sender: %s\n", from);
614 /* Construct a Resent-From: header. */
615 fprintf (out, "Resent-From: %s\n", signature);
617 if (!(msgflags & MVIS))
618 fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
624 adios (NULL, "re-format message and try again");
629 get_header (char *header, struct headers *table)
633 for (h = table; h->value; h++)
634 if (!mh_strcasecmp (header, h->value))
642 * output the address list for header "name". The address list
643 * is a linked list of mailname structs. "nl" points to the head
644 * of the list. Alias substitution should be done on nl.
647 putadr (char *name, struct mailname *nl)
649 register struct mailname *mp, *mp2;
650 register int linepos;
654 fprintf (out, "%s: ", name);
655 namelen = strlen(name) + 2;
658 for (mp = nl; mp; ) {
659 if (linepos > MAX_SM_FIELD) {
660 fprintf (out, "\n%s: ", name);
664 /* a local name - see if it's an alias */
665 cp = akvalue(mp->m_mbox);
666 if (cp == mp->m_mbox)
667 /* wasn't an alias - use what the user typed */
668 linepos = putone( mp->m_text, linepos, namelen );
670 /* an alias - expand it */
671 while ((cp = getname(cp))) {
672 if (linepos > MAX_SM_FIELD) {
673 fprintf (out, "\n%s: ", name);
676 mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
678 mp2->m_pers = getcpy(mp->m_mbox);
679 linepos = putone( adrformat(mp2), linepos, namelen );
681 linepos = putone( mp2->m_text, linepos, namelen );
686 /* not a local name - use what the user typed */
687 linepos = putone( mp->m_text, linepos, namelen );
697 putone (char *adr, int pos, int indent)
705 else if ( linepos+len > outputlinelen ) {
706 fprintf ( out, ",\n%*s", indent, "");
723 insert_fcc (struct headers *hdr, unsigned char *pp)
727 for (cp = pp; isspace (*cp); cp++)
729 for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
737 adios (NULL, "too many %ss", hdr->value);
738 fccfold[fccind++] = getcpy (cp);
753 fd = mkstemp(bccfil);
754 if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
755 adios (bccfil, "unable to create");
758 if ((out = fopen (bccfil, "w")) == NULL)
759 adios (bccfil, "unable to create");
761 chmod (bccfil, 0600);
763 fprintf (out, "Date: %s\n", dtimenow (0));
764 if (msgflags & MFRM) {
765 /* There was already a From: in the draft. Don't add one. */
766 if (!draft_from_masquerading)
767 /* mts.conf didn't contain "masquerade:[...]draft_from[...]"
768 so we'll reveal the user's actual account@thismachine
769 address in a Sender: header (and use it as the envelope
771 fprintf (out, "Sender: %s\n", from);
774 /* Construct a From: header. */
775 fprintf (out, "From: %s\n", signature);
777 fprintf (out, "Subject: %s", subject);
778 fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
781 if (filter == NULL) {
782 if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
783 adios (NULL, "unable to re-open");
784 cpydgst (fd, fileno (out), tmpfil, bccfil);
788 vec[0] = r1bindex (mhlproc, '/');
790 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
794 adios ("vfork", "unable to");
797 dup2 (fileno (out), 1);
800 vec[i++] = "-forward";
806 execvp (mhlproc, vec);
807 adios (mhlproc, "unable to exec");
810 if (status = pidwait(child_id, OK))
811 admonish (NULL, "%s lost (status=0%o)", vec[0], status);
816 fseek (out, 0L, SEEK_END);
817 fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
822 /* FCC INTERACTION */
832 for (i = 0; i < fccind; i++)
834 printf ("Fcc: %s\n", fccfold[i]);
836 fcc (path, fccfold[i]);
841 fcc (char *file, char *folder)
848 printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
851 for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
856 fprintf (stderr, " %sFcc %s: ",
857 msgstate == resent ? "Resent-" : "", folder);
858 fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
862 snprintf (fold, sizeof(fold), "%s%s",
863 *folder == '+' || *folder == '@' ? "" : "+", folder);
864 execlp (fileproc, r1bindex (fileproc, '/'),
865 "-link", "-file", file, fold, NULL);
869 if ((status = pidwait(child_id, OK))) {
871 fprintf (stderr, " %sFcc %s: ",
872 msgstate == resent ? "Resent-" : "", folder);
873 fprintf (verbose ? stdout : stderr,
874 " errored (0%o)\n", status);
889 die (char *what, char *fmt, ...)
894 advertise (what, NULL, fmt, ap);