3 * slocal.c -- asynchronously filter and deliver new mail
9 * Under sendmail, users should add the line
11 * "| /usr/local/nmh/lib/slocal"
13 * to their $HOME/.forward file.
15 * Under MMDF-I, users should (symbolically) link
16 * /usr/local/nmh/lib/slocal to $HOME/bin/rcvmail.
21 #include <h/dropsbr.h>
22 #include <h/rcvmail.h>
23 #include <h/signals.h>
24 #include <zotnet/tws/tws.h>
25 #include <zotnet/mts/mts.h>
29 #include <sys/ioctl.h>
32 #ifdef HAVE_DB1_NDBM_H
42 # define UTMP_FILE _PATH_UTMP
44 # define UTMP_FILE "/etc/utmp"
48 static struct swit switches[] = {
50 { "addr address", 0 },
56 { "sender address", 0 },
58 { "mailbox file", 0 },
60 { "home directory", -4 },
64 { "maildelivery file", 0 },
69 #define SUPPRESSDUP 10
71 #define NSUPPRESSDUP 11
72 { "nosuppressdup", 0 },
82 static int globbed = 0; /* have we built "vars" table yet? */
83 static int parsed = 0; /* have we built header field table yet */
84 static int utmped = 0; /* have we scanned umtp(x) file yet */
85 static int suppressdup = 0; /* are we suppressing duplicate messages? */
87 static int verbose = 0;
90 static char *addr = NULL;
91 static char *user = NULL;
92 static char *info = NULL;
93 static char *file = NULL;
94 static char *sender = NULL;
95 static char *envelope = NULL; /* envelope information ("From " line) */
96 static char *mbox = NULL;
97 static char *home = NULL;
99 static struct passwd *pw; /* passwd file entry */
101 static char ddate[BUFSIZ]; /* record the delivery date */
104 static jmp_buf myctx;
106 /* flags for pair->p_flags */
108 #define P_ADR 0x01 /* field is address */
109 #define P_HID 0x02 /* special (fake) field */
121 * Lookup table for matching fields and patterns
122 * in messages. The rest of the table is added
123 * when the message is parsed.
125 static struct pair hdrs[NVEC + 1] = {
126 { "source", NULL, P_HID },
127 { "addr", NULL, P_HID },
128 { "Return-Path", NULL, P_ADR },
129 { "Reply-To", NULL, P_ADR },
130 { "From", NULL, P_ADR },
131 { "Sender", NULL, P_ADR },
132 { "To", NULL, P_ADR },
133 { "cc", NULL, P_ADR },
134 { "Resent-Reply-To", NULL, P_ADR },
135 { "Resent-From", NULL, P_ADR },
136 { "Resent-Sender", NULL, P_ADR },
137 { "Resent-To", NULL, P_ADR },
138 { "Resent-cc", NULL, P_ADR },
143 * The list of builtin variables to expand in a string
144 * before it is executed by the "pipe" or "qpipe" action.
146 static struct pair vars[] = {
147 { "sender", NULL, P_NIL },
148 { "address", NULL, P_NIL },
149 { "size", NULL, P_NIL },
150 { "reply-to", NULL, P_CHK },
151 { "info", NULL, P_NIL },
155 extern char **environ;
160 static int localmail (int, char *);
161 static int usr_delivery (int, char *, int);
162 static int split (char *, char **);
163 static int parse (int);
164 static void expand (char *, char *, int);
165 static void glob (int);
166 static struct pair *lookup (struct pair *, char *);
167 static int logged_in (void);
168 static int timely (char *, char *);
169 static int usr_file (int, char *, int);
170 static int usr_pipe (int, char *, char *, char **, int);
171 static int usr_folder (int, char *);
172 static RETSIGTYPE alrmser (int);
173 static void get_sender (char *, char **);
174 static int copy_message (int, char *, int);
175 static void verbose_printf (char *fmt, ...);
176 static void adorn (char *, char *, ...);
177 static void debug_printf (char *fmt, ...);
178 static int suppress_duplicates (int, char *);
179 static char *trim (char *);
183 main (int argc, char **argv)
187 char *cp, *mdlvr = NULL, buf[BUFSIZ];
188 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
189 char **argp, **arguments;
192 setlocale(LC_ALL, "");
194 invo_name = r1bindex (*argv, '/');
196 /* foil search of user profile/context */
197 if (context_foil (NULL) == -1)
200 mts_init (invo_name);
201 arguments = getarguments (invo_name, argc, argv, 0);
204 /* Parse arguments */
205 while ((cp = *argp++)) {
207 switch (smatch (++cp, switches)) {
209 ambigsw (cp, switches);
212 adios (NULL, "-%s unknown", cp);
215 snprintf (buf, sizeof(buf),
216 "%s [switches] [address info sender]", invo_name);
217 print_help (buf, switches, 0);
220 print_version(invo_name);
224 if (!(addr = *argp++))/* allow -xyz arguments */
225 adios (NULL, "missing argument to %s", argp[-2]);
228 if (!(info = *argp++))/* allow -xyz arguments */
229 adios (NULL, "missing argument to %s", argp[-2]);
232 if (!(user = *argp++))/* allow -xyz arguments */
233 adios (NULL, "missing argument to %s", argp[-2]);
236 if (!(file = *argp++) || *file == '-')
237 adios (NULL, "missing argument to %s", argp[-2]);
240 if (!(sender = *argp++))/* allow -xyz arguments */
241 adios (NULL, "missing argument to %s", argp[-2]);
244 if (!(mbox = *argp++) || *mbox == '-')
245 adios (NULL, "missing argument to %s", argp[-2]);
248 if (!(home = *argp++) || *home == '-')
249 adios (NULL, "missing argument to %s", argp[-2]);
253 if (!(cp = *argp++) || *cp == '-')
254 adios (NULL, "missing argument to %s", argp[-2]);
256 adios (NULL, "only one maildelivery file at a time!");
279 switch (argp - (argv + 1)) {
295 addr = getusername ();
297 user = (cp = strchr(addr, '.')) ? ++cp : addr;
298 if ((pw = getpwnam (user)) == NULL)
299 adios (NULL, "no such local user as %s", user);
301 if (chdir (pw->pw_dir) == -1)
305 if (geteuid() == 0) {
307 initgroups (pw->pw_name, pw->pw_gid);
314 setbuf (stdin, NULL);
316 /* Record the delivery time */
317 if ((now = dlocaltimenow ()) == NULL)
318 adios (NULL, "unable to ascertain local time");
319 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
322 * Copy the message to a temporary file
327 /* getting message from file */
328 if ((tempfd = open (file, O_RDONLY)) == -1)
329 adios (file, "unable to open");
331 debug_printf ("retrieving message from file \"%s\"\n", file);
332 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
333 adios (NULL, "unable to create temporary file");
336 /* getting message from stdin */
338 debug_printf ("retrieving message from stdin\n");
339 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
340 adios (NULL, "unable to create temporary file");
344 debug_printf ("temporary file=\"%s\"\n", tmpfil);
346 /* Delete the temp file now or a copy of every single message passed through
347 slocal will be left in the /tmp directory until deleted manually! This
348 unlink() used to be under an 'else' of the 'if (debug)' above, but since
349 some people like to always run slocal with -debug and log the results,
350 the /tmp directory would get choked over time. Of course, now that we
351 always delete the temp file, the "temporary file=" message above is
352 somewhat pointless -- someone watching debug output wouldn't have a
353 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
354 thing would be to delay this unlink() until later if debug == 1, but I'll
355 leave that for someone who cares about the temp-file-accessing
356 functionality (they'll have to watch out for cases where we adios()). */
359 if (!(fp = fdopen (fd, "r+")))
360 adios (NULL, "unable to access temporary file");
363 * If no sender given, extract it
364 * from envelope information. */
366 get_sender (envelope, &sender);
369 snprintf (mailbox, sizeof(mailbox), "%s/%s",
370 mmdfldir[0] ? mmdfldir : pw->pw_dir,
371 mmdflfil[0] ? mmdflfil : pw->pw_name);
378 debug_printf ("addr=\"%s\"\n", trim(addr));
379 debug_printf ("user=\"%s\"\n", trim(user));
380 debug_printf ("info=\"%s\"\n", trim(info));
381 debug_printf ("sender=\"%s\"\n", trim(sender));
382 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
383 debug_printf ("mbox=\"%s\"\n", trim(mbox));
384 debug_printf ("home=\"%s\"\n", trim(home));
385 debug_printf ("ddate=\"%s\"\n", trim(ddate));
386 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
389 /* deliver the message */
390 status = localmail (fd, mdlvr);
392 return done (status != -1 ? RCV_MOK : RCV_MBX);
397 * Main routine for delivering message.
401 localmail (int fd, char *mdlvr)
403 /* check if this message is a duplicate */
405 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
408 /* delivery according to personal Maildelivery file */
409 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
412 /* delivery according to global Maildelivery file */
413 if (usr_delivery (fd, maildelivery, 1) != -1)
417 verbose_printf ("(delivering to standard mail spool)\n");
419 /* last resort - deliver to standard mail spool */
421 return usr_file (fd, mbox, MBOX_FORMAT);
423 return usr_file (fd, mbox, MMDF_FORMAT);
428 #define matches(a,b) (stringdex (b, a) >= 0)
431 * Parse the delivery file, and process incoming message.
435 usr_delivery (int fd, char *delivery, int su)
437 int i, accept, status, won, vecp, next;
438 char *field, *pattern, *action, *result, *string;
439 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
440 char *cp, *vec[NVEC];
445 /* open the delivery file */
446 if ((fp = fopen (delivery, "r")) == NULL)
449 /* check if delivery file has bad ownership or permissions */
450 if (fstat (fileno (fp), &st) == -1
451 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
452 || st.st_mode & (S_IWGRP|S_IWOTH)) {
454 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
455 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
463 /* read and process delivery file */
464 while (fgets (buffer, sizeof(buffer), fp)) {
465 /* skip comments and empty lines */
466 if (*buffer == '#' || *buffer == '\n')
469 /* zap trailing newline */
470 if ((cp = strchr(buffer, '\n')))
473 /* split buffer into fields */
474 vecp = split (buffer, vec);
476 /* check for too few fields */
479 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
484 for (i = 0; vec[i]; i++)
485 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
494 /* find out how to perform the action */
499 * If previous condition failed, don't
500 * do this - else fall through
503 continue; /* else fall */
507 * If already delivered, skip this action. Else
508 * consider delivered if action is successful.
511 continue; /* else fall */
516 * Take action, and consider delivered if
517 * action is successful.
526 * Take action, but don't consider delivered, even
527 * if action is successful
534 if (!strcasecmp (vec[5], "select")) {
535 if (logged_in () != -1)
537 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
542 /* check if the field matches */
550 * "default" matches only if the message hasn't
551 * been delivered yet.
553 if (!strcasecmp (field, "default")) {
560 /* parse message and build lookup table */
561 if (!parsed && parse (fd) == -1) {
566 * find header field in lookup table, and
567 * see if the pattern matches.
569 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
570 && matches (p->p_value, pattern)) {
579 /* find out the action to perform */
582 /* deliver to quoted pipe */
583 if (strcasecmp (action, "qpipe"))
584 continue; /* else fall */
586 expand (tmpbuf, string, fd);
587 if (split (tmpbuf, vec) < 1)
589 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
593 /* deliver to pipe */
594 if (strcasecmp (action, "pipe"))
595 continue; /* else fall */
599 expand (tmpbuf, string, fd);
602 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
607 if (!strcasecmp (action, "file")) {
608 status = usr_file (fd, string, MBOX_FORMAT);
611 /* deliver to nmh folder */
612 else if (strcasecmp (action, "folder"))
613 continue; /* else fall */
615 status = usr_folder (fd, string);
620 if (!strcasecmp (action, "mmdf")) {
621 status = usr_file (fd, string, MMDF_FORMAT);
625 else if (strcasecmp (action, "mbox"))
626 continue; /* else fall */
630 status = usr_file (fd, string, MBOX_FORMAT);
635 if (strcasecmp (action, "destroy"))
641 if (accept && status == 0)
646 return (won ? 0 : -1);
653 * Split buffer into fields (delimited by whitespace or
654 * comma's). Return the number of fields found.
658 split (char *cp, char **vec)
665 /* split into a maximum of NVEC fields */
666 for (i = 0; i <= NVEC;) {
669 /* zap any whitespace and comma's */
670 while (isspace (*s) || *s == ',')
673 /* end of buffer, time to leave */
677 /* get double quote text as a single field */
679 for (vec[i++] = ++s; *s && *s != '"'; s++) {
681 * Check for escaped double quote. We need
682 * to shift the string to remove slash.
690 if (*s == '"') /* zap trailing double quote */
695 if (*s == QUOTE && *++s != '"')
699 /* move forward to next field delimiter */
700 while (*s && !isspace (*s) && *s != ',')
710 * Parse the headers of a message, and build the
711 * lookup table for matching fields and patterns.
720 char name[NAMESZ], field[BUFSIZ];
727 /* get a new FILE pointer to message */
728 if ((fd1 = dup (fd)) == -1)
730 if ((in = fdopen (fd1, "r")) == NULL) {
736 /* add special entries to lookup table */
737 if ((p = lookup (hdrs, "source")))
738 p->p_value = getcpy (sender);
739 if ((p = lookup (hdrs, "addr")))
740 p->p_value = getcpy (addr);
743 * Scan the headers of the message and build
746 for (i = 0, state = FLD;;) {
747 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
751 lp = add (field, NULL);
752 while (state == FLDPLUS) {
753 state = m_getfld (state, name, field, sizeof(field), in);
754 lp = add (field, lp);
756 for (p = hdrs; p->p_name; p++) {
757 if (!strcasecmp (p->p_name, name)) {
758 if (!(p->p_flags & P_HID)) {
759 if ((cp = p->p_value)) {
760 if (p->p_flags & P_ADR) {
761 dp = cp + strlen (cp) - 1;
764 cp = add (",\n\t", cp);
769 p->p_value = add (lp, cp);
775 if (p->p_name == NULL && i < NVEC) {
776 p->p_name = getcpy (name);
793 advise (NULL, "format error in message");
797 advise (NULL, "internal error in m_getfld");
805 if ((p = lookup (vars, "reply-to"))) {
806 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
807 q = lookup (hdrs, "from");
808 p->p_value = getcpy (q ? q->p_value : "");
809 p->p_flags &= ~P_CHK;
811 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
812 p - vars, p->p_name, trim(p->p_value));
815 for (p = hdrs; p->p_name; p++)
816 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
817 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
828 * Expand any builtin variables such as $(sender),
829 * $(address), etc., in a string.
833 expand (char *s1, char *s2, int fd)
841 while ((c = *s2++)) {
842 if (c != '$' || *s2 != LPAREN) {
845 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
852 if ((p = lookup (vars, cp))) {
853 if (!parsed && (p->p_flags & P_CHK))
856 strcpy (s1, p->p_value);
866 * Fill in the information missing from the "vars"
867 * table, which is necessary to expand any builtin
868 * variables in the string for a "pipe" or "qpipe"
882 if ((p = lookup (vars, "sender")))
883 p->p_value = getcpy (sender);
884 if ((p = lookup (vars, "address")))
885 p->p_value = getcpy (addr);
886 if ((p = lookup (vars, "size"))) {
887 snprintf (buffer, sizeof(buffer), "%d",
888 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
889 p->p_value = getcpy (buffer);
891 if ((p = lookup (vars, "info")))
892 p->p_value = getcpy (info);
895 for (p = vars; p->p_name; p++)
896 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
897 p - vars, p->p_name, trim(p->p_value));
903 * Find a matching name in a lookup table. If found,
904 * return the "pairs" entry, else return NULL.
908 lookup (struct pair *pairs, char *key)
910 for (; pairs->p_name; pairs++)
911 if (!strcasecmp (pairs->p_name, key))
919 * Check utmp(x) file to see if user is currently
932 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
935 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
936 if (ut.ut_name[0] != 0
937 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
941 return (utmped = DONE);
946 return (utmped = NOTOK);
950 #define check(t,a,b) if (t < a || t > b) return -1
951 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
954 timely (char *t1, char *t2)
956 int t1hours, t1mins, t2hours, t2mins;
958 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
960 check (t1hours, 0, 23);
961 check (t1mins, 0, 59);
963 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
965 check (t2hours, 0, 23);
966 check (t2mins, 0, 59);
968 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
969 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
976 * Deliver message by appending to a file.
980 usr_file (int fd, char *mailbox, int mbx_style)
985 verbose_printf ("delivering to file \"%s\"", mailbox);
987 if (mbx_style == MBOX_FORMAT) {
989 verbose_printf (" (mbox style)");
993 verbose_printf (" (mmdf style)");
997 /* open and lock the file */
998 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1000 adorn ("", "unable to open:");
1004 lseek (fd, (off_t) 0, SEEK_SET);
1006 /* append message to file */
1007 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1009 adorn ("", "error writing to:");
1013 /* close and unlock file */
1014 mbx_close (mailbox, md);
1017 verbose_printf (", success.\n");
1023 * Deliver message to a nmh folder.
1027 usr_folder (int fd, char *string)
1030 char folder[BUFSIZ], *vec[3];
1032 /* get folder name ready */
1034 strncpy(folder, string, sizeof(folder));
1036 snprintf(folder, sizeof(folder), "+%s", string);
1039 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1041 vec[0] = "rcvstore";
1045 /* use rcvstore to put message in folder */
1046 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1050 * Currently, verbose status messages are handled by usr_pipe().
1054 verbose_printf (", success.\n");
1056 verbose_printf (", failed.\n");
1064 * Deliver message to a process.
1068 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1071 int i, bytes, seconds, status;
1074 if (verbose && !suppress)
1075 verbose_printf ("delivering to pipe \"%s\"", cmd);
1077 lseek (fd, (off_t) 0, SEEK_SET);
1079 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1086 adorn ("fork", "unable to");
1093 freopen ("/dev/null", "w", stdout);
1094 freopen ("/dev/null", "w", stderr);
1100 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1101 ioctl (fd, TIOCNOTTY, NULL);
1104 #endif /* TIOCNOTTY */
1106 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1109 m_putenv ("USER", pw->pw_name);
1110 m_putenv ("HOME", pw->pw_dir);
1111 m_putenv ("SHELL", pw->pw_shell);
1117 /* parent process */
1118 if (!setjmp (myctx)) {
1119 SIGNAL (SIGALRM, alrmser);
1120 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1122 /* amount of time to wait depends on message size */
1124 /* give at least 5 minutes */
1126 } else if (bytes >= 90000) {
1127 /* a half hour is long enough */
1130 seconds = (bytes / 60) + 300;
1132 alarm ((unsigned int) seconds);
1133 status = pidwait (child_id, 0);
1137 if (status == RP_MOK || status == RP_OK)
1142 verbose_printf (", success.\n");
1144 if ((status & 0xff00) == 0xff00)
1145 verbose_printf (", system error\n");
1147 pidstatus (status, stdout, ", failed");
1149 return (status == 0 ? 0 : -1);
1152 * Ruthlessly kill the child and anything
1153 * else in its process group.
1155 KILLPG(child_id, SIGKILL);
1157 verbose_printf (", timed-out; terminated\n");
1167 #ifndef RELIABLE_SIGNALS
1168 SIGNAL (SIGALRM, alrmser);
1171 longjmp (myctx, DONE);
1176 * Get the `sender' from the envelope
1177 * information ("From " line).
1181 get_sender (char *envelope, char **sender)
1185 char buffer[BUFSIZ];
1187 if (envelope == NULL) {
1188 *sender = getcpy ("");
1192 i = strlen ("From ");
1193 strncpy (buffer, envelope + i, sizeof(buffer));
1194 if ((cp = strchr(buffer, '\n'))) {
1204 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1209 *sender = getcpy (buffer);
1214 * Copy message into a temporary file.
1215 * While copying, it will do some header processing
1216 * including the extraction of the envelope information.
1220 copy_message (int qd, char *tmpfil, int fold)
1222 int i, first = 1, fd1, fd2;
1223 char buffer[BUFSIZ];
1226 strcpy (tmpfil, m_tmpfil (invo_name));
1228 /* open temporary file to put message in */
1229 if ((fd1 = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == -1)
1233 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1234 if (write (fd1, buffer, i) != i) {
1242 lseek (fd1, (off_t) 0, SEEK_SET);
1246 /* dup the fd for incoming message */
1247 if ((fd2 = dup (qd)) == -1) {
1252 /* now create a FILE pointer for it */
1253 if ((qfp = fdopen (fd2, "r")) == NULL) {
1259 /* dup the fd for temporary file */
1260 if ((fd2 = dup (fd1)) == -1) {
1266 /* now create a FILE pointer for it */
1267 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1275 * copy message into temporary file
1276 * and massage the headers. Save
1277 * a copy of the "From " line for later.
1279 i = strlen ("From ");
1280 while (fgets (buffer, sizeof(buffer), qfp)) {
1283 if (!strncmp (buffer, "From ", i)) {
1285 char *fp, *cp, *hp, *ep;
1287 /* get copy of envelope information ("From " line) */
1288 envelope = getcpy (buffer);
1291 /* First go ahead and put "From " line in message */
1292 fputs (buffer, ffp);
1299 * Now create a "Return-Path:" line
1300 * from the "From " line.
1302 hp = cp = strchr(fp = envelope + i, ' ');
1303 while ((hp = strchr(++hp, 'r')))
1304 if (uprf (hp, "remote from")) {
1305 hp = strrchr(hp, ' ');
1309 /* return path for UUCP style addressing */
1310 ep = strchr(++hp, '\n');
1311 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1312 ep - hp, hp, cp - fp, fp);
1314 /* return path for standard domain addressing */
1315 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1319 /* Add Return-Path header to message */
1320 fputs (buffer, ffp);
1324 /* Put the delivery date in message */
1333 fputs (buffer, ffp);
1345 lseek (fd1, (off_t) 0, SEEK_SET);
1357 * Trim strings for pretty printing of debugging output
1363 char buffer[BUFSIZ*4];
1369 /* copy string into temp buffer */
1370 strncpy (buffer, cp, sizeof(buffer));
1373 /* skip over leading whitespace */
1374 while (isspace(*bp))
1377 /* start at the end and zap trailing whitespace */
1378 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1385 /* replace remaining whitespace with spaces */
1386 for (sp = bp; *sp; sp++)
1390 /* now return a copy */
1395 * Function for printing `verbose' messages.
1399 verbose_printf (char *fmt, ...)
1404 vfprintf (stdout, fmt, ap);
1407 fflush (stdout); /* now flush output */
1412 * Function for printing `verbose' delivery
1417 adorn (char *what, char *fmt, ...)
1423 eindex = errno; /* save the errno */
1424 fprintf (stdout, ", ");
1427 vfprintf (stdout, fmt, ap);
1432 fprintf (stdout, " %s: ", what);
1433 if ((s = strerror (eindex)))
1434 fprintf (stdout, "%s", s);
1436 fprintf (stdout, "Error %d", eindex);
1439 fputc ('\n', stdout);
1445 * Function for printing `debug' messages.
1449 debug_printf (char *fmt, ...)
1454 vfprintf (stderr, fmt, ap);
1460 * Check ndbm/db file(s) to see if the Message-Id of this
1461 * message matches the Message-Id of a previous message,
1462 * so we can discard it. If it doesn't match, we add the
1463 * Message-Id of this message to the ndbm/db file.
1466 suppress_duplicates (int fd, char *file)
1468 int fd1, lockfd, state, result;
1469 char *cp, buf[BUFSIZ], name[NAMESZ];
1474 if ((fd1 = dup (fd)) == -1)
1476 if (!(in = fdopen (fd1, "r"))) {
1482 for (state = FLD;;) {
1483 state = m_getfld (state, name, buf, sizeof(buf), in);
1488 /* Search for the message ID */
1489 if (strcasecmp (name, "Message-ID")) {
1490 while (state == FLDPLUS)
1491 state = m_getfld (state, name, buf, sizeof(buf), in);
1495 cp = add (buf, NULL);
1496 while (state == FLDPLUS) {
1497 state = m_getfld (state, name, buf, sizeof(buf), in);
1500 key.dptr = trimcpy (cp);
1501 key.dsize = strlen (key.dptr) + 1;
1505 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1506 advise (file, "unable to perform dbm_open on");
1512 * Since it is difficult to portable lock a ndbm file,
1513 * we will open and lock the Maildelivery file instead.
1514 * This will fail if your Maildelivery file doesn't
1517 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1518 advise (file, "unable to perform file locking on");
1523 value = dbm_fetch (db, key);
1526 verbose_printf ("Message-ID: %s\n already received on %s",
1530 value.dptr = ddate + sizeof("Delivery-Date:");
1531 value.dsize = strlen(value.dptr) + 1;
1532 if (dbm_store (db, key, value, DBM_INSERT))
1533 advise (file, "possibly corrupt file");
1538 lkclose(lockfd, file);