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>
33 #ifdef HAVE_DB1_NDBM_H
41 extern int initgroups(char*, int); /* def'd in libc.a but no .h on AIX 4.1 */
45 # define UTMP_FILE _PATH_UTMP
47 # define UTMP_FILE "/etc/utmp"
51 static struct swit switches[] = {
53 { "addr address", 0 },
59 { "sender address", 0 },
61 { "mailbox file", 0 },
63 { "home directory", -4 },
67 { "maildelivery file", 0 },
72 #define SUPPRESSDUP 10
74 #define NSUPPRESSDUP 11
75 { "nosuppressdup", 0 },
85 static int globbed = 0; /* have we built "vars" table yet? */
86 static int parsed = 0; /* have we built header field table yet */
87 static int utmped = 0; /* have we scanned umtp(x) file yet */
88 static int suppressdup = 0; /* are we suppressing duplicate messages? */
90 static int verbose = 0;
93 static char *addr = NULL;
94 static char *user = NULL;
95 static char *info = NULL;
96 static char *file = NULL;
97 static char *sender = NULL;
98 static char *envelope = NULL; /* envelope information ("From " line) */
99 static char *mbox = NULL;
100 static char *home = NULL;
102 static struct passwd *pw; /* passwd file entry */
104 static char ddate[BUFSIZ]; /* record the delivery date */
107 static jmp_buf myctx;
109 /* flags for pair->p_flags */
111 #define P_ADR 0x01 /* field is address */
112 #define P_HID 0x02 /* special (fake) field */
124 * Lookup table for matching fields and patterns
125 * in messages. The rest of the table is added
126 * when the message is parsed.
128 static struct pair hdrs[NVEC + 1] = {
129 { "source", NULL, P_HID },
130 { "addr", NULL, P_HID },
131 { "Return-Path", NULL, P_ADR },
132 { "Reply-To", NULL, P_ADR },
133 { "From", NULL, P_ADR },
134 { "Sender", NULL, P_ADR },
135 { "To", NULL, P_ADR },
136 { "cc", NULL, P_ADR },
137 { "Resent-Reply-To", NULL, P_ADR },
138 { "Resent-From", NULL, P_ADR },
139 { "Resent-Sender", NULL, P_ADR },
140 { "Resent-To", NULL, P_ADR },
141 { "Resent-cc", NULL, P_ADR },
146 * The list of builtin variables to expand in a string
147 * before it is executed by the "pipe" or "qpipe" action.
149 static struct pair vars[] = {
150 { "sender", NULL, P_NIL },
151 { "address", NULL, P_NIL },
152 { "size", NULL, P_NIL },
153 { "reply-to", NULL, P_CHK },
154 { "info", NULL, P_NIL },
158 extern char **environ;
163 static int localmail (int, char *);
164 static int usr_delivery (int, char *, int);
165 static int split (char *, char **);
166 static int parse (int);
167 static void expand (char *, char *, int);
168 static void glob (int);
169 static struct pair *lookup (struct pair *, char *);
170 static int logged_in (void);
171 static int timely (char *, char *);
172 static int usr_file (int, char *, int);
173 static int usr_pipe (int, char *, char *, char **, int);
174 static int usr_folder (int, char *);
175 static RETSIGTYPE alrmser (int);
176 static void get_sender (char *, char **);
177 static int copy_message (int, char *, int);
178 static void verbose_printf (char *fmt, ...);
179 static void adorn (char *, char *, ...);
180 static void debug_printf (char *fmt, ...);
181 static int suppress_duplicates (int, char *);
182 static char *trim (char *);
186 main (int argc, char **argv)
190 char *cp, *mdlvr = NULL, buf[BUFSIZ];
191 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
192 char **argp, **arguments;
195 setlocale(LC_ALL, "");
197 invo_name = r1bindex (*argv, '/');
199 /* foil search of user profile/context */
200 if (context_foil (NULL) == -1)
203 mts_init (invo_name);
204 arguments = getarguments (invo_name, argc, argv, 0);
207 /* Parse arguments */
208 while ((cp = *argp++)) {
210 switch (smatch (++cp, switches)) {
212 ambigsw (cp, switches);
215 adios (NULL, "-%s unknown", cp);
218 snprintf (buf, sizeof(buf),
219 "%s [switches] [address info sender]", invo_name);
220 print_help (buf, switches, 0);
223 print_version(invo_name);
227 if (!(addr = *argp++))/* allow -xyz arguments */
228 adios (NULL, "missing argument to %s", argp[-2]);
231 if (!(info = *argp++))/* allow -xyz arguments */
232 adios (NULL, "missing argument to %s", argp[-2]);
235 if (!(user = *argp++))/* allow -xyz arguments */
236 adios (NULL, "missing argument to %s", argp[-2]);
239 if (!(file = *argp++) || *file == '-')
240 adios (NULL, "missing argument to %s", argp[-2]);
243 if (!(sender = *argp++))/* allow -xyz arguments */
244 adios (NULL, "missing argument to %s", argp[-2]);
247 if (!(mbox = *argp++) || *mbox == '-')
248 adios (NULL, "missing argument to %s", argp[-2]);
251 if (!(home = *argp++) || *home == '-')
252 adios (NULL, "missing argument to %s", argp[-2]);
256 if (!(cp = *argp++) || *cp == '-')
257 adios (NULL, "missing argument to %s", argp[-2]);
259 adios (NULL, "only one maildelivery file at a time!");
282 switch (argp - (argv + 1)) {
298 addr = getusername ();
300 user = (cp = strchr(addr, '.')) ? ++cp : addr;
301 if ((pw = getpwnam (user)) == NULL)
302 adios (NULL, "no such local user as %s", user);
304 if (chdir (pw->pw_dir) == -1)
308 if (geteuid() == 0) {
310 initgroups (pw->pw_name, pw->pw_gid);
317 setbuf (stdin, NULL);
319 /* Record the delivery time */
320 if ((now = dlocaltimenow ()) == NULL)
321 adios (NULL, "unable to ascertain local time");
322 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
325 * Copy the message to a temporary file
330 /* getting message from file */
331 if ((tempfd = open (file, O_RDONLY)) == -1)
332 adios (file, "unable to open");
334 debug_printf ("retrieving message from file \"%s\"\n", file);
335 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
336 adios (NULL, "unable to create temporary file");
339 /* getting message from stdin */
341 debug_printf ("retrieving message from stdin\n");
342 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
343 adios (NULL, "unable to create temporary file");
347 debug_printf ("temporary file=\"%s\"\n", tmpfil);
349 /* Delete the temp file now or a copy of every single message passed through
350 slocal will be left in the /tmp directory until deleted manually! This
351 unlink() used to be under an 'else' of the 'if (debug)' above, but since
352 some people like to always run slocal with -debug and log the results,
353 the /tmp directory would get choked over time. Of course, now that we
354 always delete the temp file, the "temporary file=" message above is
355 somewhat pointless -- someone watching debug output wouldn't have a
356 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
357 thing would be to delay this unlink() until later if debug == 1, but I'll
358 leave that for someone who cares about the temp-file-accessing
359 functionality (they'll have to watch out for cases where we adios()). */
362 if (!(fp = fdopen (fd, "r+")))
363 adios (NULL, "unable to access temporary file");
366 * If no sender given, extract it
367 * from envelope information. */
369 get_sender (envelope, &sender);
372 snprintf (mailbox, sizeof(mailbox), "%s/%s",
373 mmdfldir[0] ? mmdfldir : pw->pw_dir,
374 mmdflfil[0] ? mmdflfil : pw->pw_name);
381 debug_printf ("addr=\"%s\"\n", trim(addr));
382 debug_printf ("user=\"%s\"\n", trim(user));
383 debug_printf ("info=\"%s\"\n", trim(info));
384 debug_printf ("sender=\"%s\"\n", trim(sender));
385 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
386 debug_printf ("mbox=\"%s\"\n", trim(mbox));
387 debug_printf ("home=\"%s\"\n", trim(home));
388 debug_printf ("ddate=\"%s\"\n", trim(ddate));
389 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
392 /* deliver the message */
393 status = localmail (fd, mdlvr);
395 return done (status != -1 ? RCV_MOK : RCV_MBX);
400 * Main routine for delivering message.
404 localmail (int fd, char *mdlvr)
406 /* check if this message is a duplicate */
408 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
411 /* delivery according to personal Maildelivery file */
412 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
415 /* delivery according to global Maildelivery file */
416 if (usr_delivery (fd, maildelivery, 1) != -1)
420 verbose_printf ("(delivering to standard mail spool)\n");
422 /* last resort - deliver to standard mail spool */
424 return usr_file (fd, mbox, MBOX_FORMAT);
426 return usr_file (fd, mbox, MMDF_FORMAT);
431 #define matches(a,b) (stringdex (b, a) >= 0)
434 * Parse the delivery file, and process incoming message.
438 usr_delivery (int fd, char *delivery, int su)
440 int i, accept, status, won, vecp, next;
441 char *field, *pattern, *action, *result, *string;
442 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
443 char *cp, *vec[NVEC];
448 /* open the delivery file */
449 if ((fp = fopen (delivery, "r")) == NULL)
452 /* check if delivery file has bad ownership or permissions */
453 if (fstat (fileno (fp), &st) == -1
454 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
455 || st.st_mode & (S_IWGRP|S_IWOTH)) {
457 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
458 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
466 /* read and process delivery file */
467 while (fgets (buffer, sizeof(buffer), fp)) {
468 /* skip comments and empty lines */
469 if (*buffer == '#' || *buffer == '\n')
472 /* zap trailing newline */
473 if ((cp = strchr(buffer, '\n')))
476 /* split buffer into fields */
477 vecp = split (buffer, vec);
479 /* check for too few fields */
482 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
487 for (i = 0; vec[i]; i++)
488 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
497 /* find out how to perform the action */
502 * If previous condition failed, don't
503 * do this - else fall through
506 continue; /* else fall */
510 * If already delivered, skip this action. Else
511 * consider delivered if action is successful.
514 continue; /* else fall */
519 * Take action, and consider delivered if
520 * action is successful.
529 * Take action, but don't consider delivered, even
530 * if action is successful
537 if (!strcasecmp (vec[5], "select")) {
538 if (logged_in () != -1)
540 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
545 /* check if the field matches */
553 * "default" matches only if the message hasn't
554 * been delivered yet.
556 if (!strcasecmp (field, "default")) {
563 /* parse message and build lookup table */
564 if (!parsed && parse (fd) == -1) {
569 * find header field in lookup table, and
570 * see if the pattern matches.
572 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
573 && matches (p->p_value, pattern)) {
582 /* find out the action to perform */
585 /* deliver to quoted pipe */
586 if (strcasecmp (action, "qpipe"))
587 continue; /* else fall */
589 expand (tmpbuf, string, fd);
590 if (split (tmpbuf, vec) < 1)
592 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
596 /* deliver to pipe */
597 if (strcasecmp (action, "pipe"))
598 continue; /* else fall */
602 expand (tmpbuf, string, fd);
605 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
610 if (!strcasecmp (action, "file")) {
611 status = usr_file (fd, string, MBOX_FORMAT);
614 /* deliver to nmh folder */
615 else if (strcasecmp (action, "folder"))
616 continue; /* else fall */
618 status = usr_folder (fd, string);
623 if (!strcasecmp (action, "mmdf")) {
624 status = usr_file (fd, string, MMDF_FORMAT);
628 else if (strcasecmp (action, "mbox"))
629 continue; /* else fall */
633 status = usr_file (fd, string, MBOX_FORMAT);
638 if (strcasecmp (action, "destroy"))
644 if (accept && status == 0)
649 return (won ? 0 : -1);
656 * Split buffer into fields (delimited by whitespace or
657 * comma's). Return the number of fields found.
661 split (char *cp, char **vec)
668 /* split into a maximum of NVEC fields */
669 for (i = 0; i <= NVEC;) {
672 /* zap any whitespace and comma's */
673 while (isspace (*s) || *s == ',')
676 /* end of buffer, time to leave */
680 /* get double quote text as a single field */
682 for (vec[i++] = ++s; *s && *s != '"'; s++) {
684 * Check for escaped double quote. We need
685 * to shift the string to remove slash.
693 if (*s == '"') /* zap trailing double quote */
698 if (*s == QUOTE && *++s != '"')
702 /* move forward to next field delimiter */
703 while (*s && !isspace (*s) && *s != ',')
713 * Parse the headers of a message, and build the
714 * lookup table for matching fields and patterns.
723 char name[NAMESZ], field[BUFSIZ];
730 /* get a new FILE pointer to message */
731 if ((fd1 = dup (fd)) == -1)
733 if ((in = fdopen (fd1, "r")) == NULL) {
739 /* add special entries to lookup table */
740 if ((p = lookup (hdrs, "source")))
741 p->p_value = getcpy (sender);
742 if ((p = lookup (hdrs, "addr")))
743 p->p_value = getcpy (addr);
746 * Scan the headers of the message and build
749 for (i = 0, state = FLD;;) {
750 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
754 lp = add (field, NULL);
755 while (state == FLDPLUS) {
756 state = m_getfld (state, name, field, sizeof(field), in);
757 lp = add (field, lp);
759 for (p = hdrs; p->p_name; p++) {
760 if (!strcasecmp (p->p_name, name)) {
761 if (!(p->p_flags & P_HID)) {
762 if ((cp = p->p_value)) {
763 if (p->p_flags & P_ADR) {
764 dp = cp + strlen (cp) - 1;
767 cp = add (",\n\t", cp);
772 p->p_value = add (lp, cp);
778 if (p->p_name == NULL && i < NVEC) {
779 p->p_name = getcpy (name);
796 advise (NULL, "format error in message");
800 advise (NULL, "internal error in m_getfld");
808 if ((p = lookup (vars, "reply-to"))) {
809 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
810 q = lookup (hdrs, "from");
811 p->p_value = getcpy (q ? q->p_value : "");
812 p->p_flags &= ~P_CHK;
814 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
815 p - vars, p->p_name, trim(p->p_value));
818 for (p = hdrs; p->p_name; p++)
819 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
820 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
831 * Expand any builtin variables such as $(sender),
832 * $(address), etc., in a string.
836 expand (char *s1, char *s2, int fd)
844 while ((c = *s2++)) {
845 if (c != '$' || *s2 != LPAREN) {
848 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
855 if ((p = lookup (vars, cp))) {
856 if (!parsed && (p->p_flags & P_CHK))
859 strcpy (s1, p->p_value);
869 * Fill in the information missing from the "vars"
870 * table, which is necessary to expand any builtin
871 * variables in the string for a "pipe" or "qpipe"
885 if ((p = lookup (vars, "sender")))
886 p->p_value = getcpy (sender);
887 if ((p = lookup (vars, "address")))
888 p->p_value = getcpy (addr);
889 if ((p = lookup (vars, "size"))) {
890 snprintf (buffer, sizeof(buffer), "%d",
891 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
892 p->p_value = getcpy (buffer);
894 if ((p = lookup (vars, "info")))
895 p->p_value = getcpy (info);
898 for (p = vars; p->p_name; p++)
899 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
900 p - vars, p->p_name, trim(p->p_value));
906 * Find a matching name in a lookup table. If found,
907 * return the "pairs" entry, else return NULL.
911 lookup (struct pair *pairs, char *key)
913 for (; pairs->p_name; pairs++)
914 if (!strcasecmp (pairs->p_name, key))
922 * Check utmp(x) file to see if user is currently
935 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
938 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
939 if (ut.ut_name[0] != 0
940 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
944 return (utmped = DONE);
949 return (utmped = NOTOK);
953 #define check(t,a,b) if (t < a || t > b) return -1
954 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
957 timely (char *t1, char *t2)
959 int t1hours, t1mins, t2hours, t2mins;
961 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
963 check (t1hours, 0, 23);
964 check (t1mins, 0, 59);
966 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
968 check (t2hours, 0, 23);
969 check (t2mins, 0, 59);
971 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
972 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
979 * Deliver message by appending to a file.
983 usr_file (int fd, char *mailbox, int mbx_style)
988 verbose_printf ("delivering to file \"%s\"", mailbox);
990 if (mbx_style == MBOX_FORMAT) {
992 verbose_printf (" (mbox style)");
996 verbose_printf (" (mmdf style)");
1000 /* open and lock the file */
1001 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1003 adorn ("", "unable to open:");
1007 lseek (fd, (off_t) 0, SEEK_SET);
1009 /* append message to file */
1010 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1012 adorn ("", "error writing to:");
1016 /* close and unlock file */
1017 mbx_close (mailbox, md);
1020 verbose_printf (", success.\n");
1026 * Deliver message to a nmh folder.
1030 usr_folder (int fd, char *string)
1033 char folder[BUFSIZ], *vec[3];
1035 /* get folder name ready */
1037 strncpy(folder, string, sizeof(folder));
1039 snprintf(folder, sizeof(folder), "+%s", string);
1042 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1044 vec[0] = "rcvstore";
1048 /* use rcvstore to put message in folder */
1049 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1053 * Currently, verbose status messages are handled by usr_pipe().
1057 verbose_printf (", success.\n");
1059 verbose_printf (", failed.\n");
1067 * Deliver message to a process.
1071 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1074 int i, bytes, seconds, status;
1077 if (verbose && !suppress)
1078 verbose_printf ("delivering to pipe \"%s\"", cmd);
1080 lseek (fd, (off_t) 0, SEEK_SET);
1082 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1089 adorn ("fork", "unable to");
1096 freopen ("/dev/null", "w", stdout);
1097 freopen ("/dev/null", "w", stderr);
1103 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1104 ioctl (fd, TIOCNOTTY, NULL);
1107 #endif /* TIOCNOTTY */
1109 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1112 m_putenv ("USER", pw->pw_name);
1113 m_putenv ("HOME", pw->pw_dir);
1114 m_putenv ("SHELL", pw->pw_shell);
1120 /* parent process */
1121 if (!setjmp (myctx)) {
1122 SIGNAL (SIGALRM, alrmser);
1123 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1125 /* amount of time to wait depends on message size */
1127 /* give at least 5 minutes */
1129 } else if (bytes >= 90000) {
1130 /* a half hour is long enough */
1133 seconds = (bytes / 60) + 300;
1135 alarm ((unsigned int) seconds);
1136 status = pidwait (child_id, 0);
1140 if (status == RP_MOK || status == RP_OK)
1145 verbose_printf (", success.\n");
1147 if ((status & 0xff00) == 0xff00)
1148 verbose_printf (", system error\n");
1150 pidstatus (status, stdout, ", failed");
1152 return (status == 0 ? 0 : -1);
1155 * Ruthlessly kill the child and anything
1156 * else in its process group.
1158 KILLPG(child_id, SIGKILL);
1160 verbose_printf (", timed-out; terminated\n");
1170 #ifndef RELIABLE_SIGNALS
1171 SIGNAL (SIGALRM, alrmser);
1174 longjmp (myctx, DONE);
1179 * Get the `sender' from the envelope
1180 * information ("From " line).
1184 get_sender (char *envelope, char **sender)
1188 char buffer[BUFSIZ];
1190 if (envelope == NULL) {
1191 *sender = getcpy ("");
1195 i = strlen ("From ");
1196 strncpy (buffer, envelope + i, sizeof(buffer));
1197 if ((cp = strchr(buffer, '\n'))) {
1207 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1212 *sender = getcpy (buffer);
1217 * Copy message into a temporary file.
1218 * While copying, it will do some header processing
1219 * including the extraction of the envelope information.
1223 copy_message (int qd, char *tmpfil, int fold)
1225 int i, first = 1, fd1, fd2;
1226 char buffer[BUFSIZ];
1229 strcpy (tmpfil, m_tmpfil (invo_name));
1231 /* open temporary file to put message in */
1232 if ((fd1 = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == -1)
1236 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1237 if (write (fd1, buffer, i) != i) {
1245 lseek (fd1, (off_t) 0, SEEK_SET);
1249 /* dup the fd for incoming message */
1250 if ((fd2 = dup (qd)) == -1) {
1255 /* now create a FILE pointer for it */
1256 if ((qfp = fdopen (fd2, "r")) == NULL) {
1262 /* dup the fd for temporary file */
1263 if ((fd2 = dup (fd1)) == -1) {
1269 /* now create a FILE pointer for it */
1270 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1278 * copy message into temporary file
1279 * and massage the headers. Save
1280 * a copy of the "From " line for later.
1282 i = strlen ("From ");
1283 while (fgets (buffer, sizeof(buffer), qfp)) {
1286 if (!strncmp (buffer, "From ", i)) {
1288 char *fp, *cp, *hp, *ep;
1290 /* get copy of envelope information ("From " line) */
1291 envelope = getcpy (buffer);
1294 /* First go ahead and put "From " line in message */
1295 fputs (buffer, ffp);
1302 * Now create a "Return-Path:" line
1303 * from the "From " line.
1305 hp = cp = strchr(fp = envelope + i, ' ');
1306 while ((hp = strchr(++hp, 'r')))
1307 if (uprf (hp, "remote from")) {
1308 hp = strrchr(hp, ' ');
1312 /* return path for UUCP style addressing */
1313 ep = strchr(++hp, '\n');
1314 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1315 ep - hp, hp, cp - fp, fp);
1317 /* return path for standard domain addressing */
1318 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1322 /* Add Return-Path header to message */
1323 fputs (buffer, ffp);
1327 /* Put the delivery date in message */
1336 fputs (buffer, ffp);
1348 lseek (fd1, (off_t) 0, SEEK_SET);
1360 * Trim strings for pretty printing of debugging output
1366 char buffer[BUFSIZ*4];
1372 /* copy string into temp buffer */
1373 strncpy (buffer, cp, sizeof(buffer));
1376 /* skip over leading whitespace */
1377 while (isspace(*bp))
1380 /* start at the end and zap trailing whitespace */
1381 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1388 /* replace remaining whitespace with spaces */
1389 for (sp = bp; *sp; sp++)
1393 /* now return a copy */
1398 * Function for printing `verbose' messages.
1402 verbose_printf (char *fmt, ...)
1407 vfprintf (stdout, fmt, ap);
1410 fflush (stdout); /* now flush output */
1415 * Function for printing `verbose' delivery
1420 adorn (char *what, char *fmt, ...)
1426 eindex = errno; /* save the errno */
1427 fprintf (stdout, ", ");
1430 vfprintf (stdout, fmt, ap);
1435 fprintf (stdout, " %s: ", what);
1436 if ((s = strerror (eindex)))
1437 fprintf (stdout, "%s", s);
1439 fprintf (stdout, "Error %d", eindex);
1442 fputc ('\n', stdout);
1448 * Function for printing `debug' messages.
1452 debug_printf (char *fmt, ...)
1457 vfprintf (stderr, fmt, ap);
1463 * Check ndbm/db file(s) to see if the Message-Id of this
1464 * message matches the Message-Id of a previous message,
1465 * so we can discard it. If it doesn't match, we add the
1466 * Message-Id of this message to the ndbm/db file.
1469 suppress_duplicates (int fd, char *file)
1471 int fd1, lockfd, state, result;
1472 char *cp, buf[BUFSIZ], name[NAMESZ];
1477 if ((fd1 = dup (fd)) == -1)
1479 if (!(in = fdopen (fd1, "r"))) {
1485 for (state = FLD;;) {
1486 state = m_getfld (state, name, buf, sizeof(buf), in);
1491 /* Search for the message ID */
1492 if (strcasecmp (name, "Message-ID")) {
1493 while (state == FLDPLUS)
1494 state = m_getfld (state, name, buf, sizeof(buf), in);
1498 cp = add (buf, NULL);
1499 while (state == FLDPLUS) {
1500 state = m_getfld (state, name, buf, sizeof(buf), in);
1503 key.dptr = trimcpy (cp);
1504 key.dsize = strlen (key.dptr) + 1;
1508 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1509 advise (file, "unable to perform dbm_open on");
1515 * Since it is difficult to portable lock a ndbm file,
1516 * we will open and lock the Maildelivery file instead.
1517 * This will fail if your Maildelivery file doesn't
1520 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1521 advise (file, "unable to perform file locking on");
1526 value = dbm_fetch (db, key);
1529 verbose_printf ("Message-ID: %s\n already received on %s",
1533 value.dptr = ddate + sizeof("Delivery-Date:");
1534 value.dsize = strlen(value.dptr) + 1;
1535 if (dbm_store (db, key, value, DBM_INSERT))
1536 advise (file, "possibly corrupt file");
1541 lkclose(lockfd, file);