3 * slocal.c -- asynchronously filter and deliver new mail
7 * This code is Copyright (c) 2002, by the authors of nmh. See the
8 * COPYRIGHT file in the root directory of the nmh distribution for
9 * complete copyright information.
13 * Under sendmail, users should add the line
15 * "| /usr/local/nmh/lib/slocal"
17 * to their $HOME/.forward file.
21 /* Changed to use getutent() and friends. Assumes that when getutent() exists,
22 * a number of other things also exist. Please check.
23 * Ruud de Rooij <ruud@ruud.org> Sun, 28 May 2000 17:28:55 +0200
27 #include <h/dropsbr.h>
28 #include <h/rcvmail.h>
29 #include <h/signals.h>
36 #include <sys/ioctl.h>
39 #ifdef INITGROUPS_HEADER
40 #include INITGROUPS_HEADER
42 /* On AIX 4.1, initgroups() is defined and even documented (giving the parameter
43 types as char* and int), but doesn't have a prototype in any of the system
44 header files. AIX 4.3, SunOS 4.1.3, and ULTRIX 4.2A have the same
46 extern int initgroups(char*, int);
49 /* This define is needed for Berkeley db v2 and above to
50 * make the header file expose the 'historical' ndbm APIs.
51 * We define it unconditionally because this is simple and
54 #define DB_DBM_HSEARCH 1
64 # define UTMP_FILE _PATH_UTMP
66 # define UTMP_FILE "/etc/utmp"
71 static struct swit switches[] = {
73 { "addr address", 0 },
79 { "sender address", 0 },
81 { "mailbox file", 0 },
83 { "home directory", -4 },
87 { "maildelivery file", 0 },
92 #define SUPPRESSDUP 10
94 #define NSUPPRESSDUP 11
95 { "nosuppressdup", 0 },
105 static int globbed = 0; /* have we built "vars" table yet? */
106 static int parsed = 0; /* have we built header field table yet */
107 static int utmped = 0; /* have we scanned umtp(x) file yet */
108 static int suppressdup = 0; /* are we suppressing duplicate messages? */
110 static int verbose = 0;
111 static int debug = 0;
113 static char *addr = NULL;
114 static char *user = NULL;
115 static char *info = NULL;
116 static char *file = NULL;
117 static char *sender = NULL;
118 static char *envelope = NULL; /* envelope information ("From " line) */
119 static char *mbox = NULL;
120 static char *home = NULL;
122 static struct passwd *pw; /* passwd file entry */
124 static char ddate[BUFSIZ]; /* record the delivery date */
127 static jmp_buf myctx;
129 /* flags for pair->p_flags */
131 #define P_ADR 0x01 /* field is address */
132 #define P_HID 0x02 /* special (fake) field */
144 * Lookup table for matching fields and patterns
145 * in messages. The rest of the table is added
146 * when the message is parsed.
148 static struct pair hdrs[NVEC + 1] = {
149 { "source", NULL, P_HID },
150 { "addr", NULL, P_HID },
151 { "Return-Path", NULL, P_ADR },
152 { "Reply-To", NULL, P_ADR },
153 { "From", NULL, P_ADR },
154 { "Sender", NULL, P_ADR },
155 { "To", NULL, P_ADR },
156 { "cc", NULL, P_ADR },
157 { "Resent-Reply-To", NULL, P_ADR },
158 { "Resent-From", NULL, P_ADR },
159 { "Resent-Sender", NULL, P_ADR },
160 { "Resent-To", NULL, P_ADR },
161 { "Resent-cc", NULL, P_ADR },
166 * The list of builtin variables to expand in a string
167 * before it is executed by the "pipe" or "qpipe" action.
169 static struct pair vars[] = {
170 { "sender", NULL, P_NIL },
171 { "address", NULL, P_NIL },
172 { "size", NULL, P_NIL },
173 { "reply-to", NULL, P_CHK },
174 { "info", NULL, P_NIL },
178 extern char **environ;
183 static int localmail (int, char *);
184 static int usr_delivery (int, char *, int);
185 static int split (char *, char **);
186 static int parse (int);
187 static void expand (char *, char *, int);
188 static void glob (int);
189 static struct pair *lookup (struct pair *, char *);
190 static int logged_in (void);
191 static int timely (char *, char *);
192 static int usr_file (int, char *, int);
193 static int usr_pipe (int, char *, char *, char **, int);
194 static int usr_folder (int, char *);
195 static RETSIGTYPE alrmser (int);
196 static void get_sender (char *, char **);
197 static int copy_message (int, char *, int);
198 static void verbose_printf (char *fmt, ...);
199 static void adorn (char *, char *, ...);
200 static void debug_printf (char *fmt, ...);
201 static int suppress_duplicates (int, char *);
202 static char *trim (char *);
206 main (int argc, char **argv)
210 char *cp, *mdlvr = NULL, buf[BUFSIZ];
211 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
212 char **argp, **arguments;
215 setlocale(LC_ALL, "");
217 invo_name = r1bindex (*argv, '/');
219 /* foil search of user profile/context */
220 if (context_foil (NULL) == -1)
223 mts_init (invo_name);
224 arguments = getarguments (invo_name, argc, argv, 0);
227 /* Parse arguments */
228 while ((cp = *argp++)) {
230 switch (smatch (++cp, switches)) {
232 ambigsw (cp, switches);
235 adios (NULL, "-%s unknown", cp);
238 snprintf (buf, sizeof(buf),
239 "%s [switches] [address info sender]", invo_name);
240 print_help (buf, switches, 0);
243 print_version(invo_name);
247 if (!(addr = *argp++))/* allow -xyz arguments */
248 adios (NULL, "missing argument to %s", argp[-2]);
251 if (!(info = *argp++))/* allow -xyz arguments */
252 adios (NULL, "missing argument to %s", argp[-2]);
255 if (!(user = *argp++))/* allow -xyz arguments */
256 adios (NULL, "missing argument to %s", argp[-2]);
259 if (!(file = *argp++) || *file == '-')
260 adios (NULL, "missing argument to %s", argp[-2]);
263 if (!(sender = *argp++))/* allow -xyz arguments */
264 adios (NULL, "missing argument to %s", argp[-2]);
267 if (!(mbox = *argp++) || *mbox == '-')
268 adios (NULL, "missing argument to %s", argp[-2]);
271 if (!(home = *argp++) || *home == '-')
272 adios (NULL, "missing argument to %s", argp[-2]);
276 if (!(cp = *argp++) || *cp == '-')
277 adios (NULL, "missing argument to %s", argp[-2]);
279 adios (NULL, "only one maildelivery file at a time!");
302 switch (argp - (argv + 1)) {
318 addr = getusername ();
320 user = (cp = strchr(addr, '.')) ? ++cp : addr;
321 if ((pw = getpwnam (user)) == NULL)
322 adios (NULL, "no such local user as %s", user);
324 if (chdir (pw->pw_dir) == -1)
328 if (geteuid() == 0) {
330 initgroups (pw->pw_name, pw->pw_gid);
337 setbuf (stdin, NULL);
339 /* Record the delivery time */
340 if ((now = dlocaltimenow ()) == NULL)
341 adios (NULL, "unable to ascertain local time");
342 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
345 * Copy the message to a temporary file
350 /* getting message from file */
351 if ((tempfd = open (file, O_RDONLY)) == -1)
352 adios (file, "unable to open");
354 debug_printf ("retrieving message from file \"%s\"\n", file);
355 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
356 adios (NULL, "unable to create temporary file");
359 /* getting message from stdin */
361 debug_printf ("retrieving message from stdin\n");
362 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
363 adios (NULL, "unable to create temporary file");
367 debug_printf ("temporary file=\"%s\"\n", tmpfil);
369 /* Delete the temp file now or a copy of every single message passed through
370 slocal will be left in the /tmp directory until deleted manually! This
371 unlink() used to be under an 'else' of the 'if (debug)' above, but since
372 some people like to always run slocal with -debug and log the results,
373 the /tmp directory would get choked over time. Of course, now that we
374 always delete the temp file, the "temporary file=" message above is
375 somewhat pointless -- someone watching debug output wouldn't have a
376 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
377 thing would be to delay this unlink() until later if debug == 1, but I'll
378 leave that for someone who cares about the temp-file-accessing
379 functionality (they'll have to watch out for cases where we adios()). */
382 if (!(fp = fdopen (fd, "r+")))
383 adios (NULL, "unable to access temporary file");
386 * If no sender given, extract it
387 * from envelope information. */
389 get_sender (envelope, &sender);
392 snprintf (mailbox, sizeof(mailbox), "%s/%s",
393 mmdfldir[0] ? mmdfldir : pw->pw_dir,
394 mmdflfil[0] ? mmdflfil : pw->pw_name);
401 debug_printf ("addr=\"%s\"\n", trim(addr));
402 debug_printf ("user=\"%s\"\n", trim(user));
403 debug_printf ("info=\"%s\"\n", trim(info));
404 debug_printf ("sender=\"%s\"\n", trim(sender));
405 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
406 debug_printf ("mbox=\"%s\"\n", trim(mbox));
407 debug_printf ("home=\"%s\"\n", trim(home));
408 debug_printf ("ddate=\"%s\"\n", trim(ddate));
409 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
412 /* deliver the message */
413 status = localmail (fd, mdlvr);
415 return done (status != -1 ? RCV_MOK : RCV_MBX);
420 * Main routine for delivering message.
424 localmail (int fd, char *mdlvr)
426 /* check if this message is a duplicate */
428 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
431 /* delivery according to personal Maildelivery file */
432 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
435 /* delivery according to global Maildelivery file */
436 if (usr_delivery (fd, maildelivery, 1) != -1)
440 verbose_printf ("(delivering to standard mail spool)\n");
442 /* last resort - deliver to standard mail spool */
444 return usr_file (fd, mbox, MBOX_FORMAT);
446 return usr_file (fd, mbox, MMDF_FORMAT);
451 #define matches(a,b) (stringdex (b, a) >= 0)
454 * Parse the delivery file, and process incoming message.
458 usr_delivery (int fd, char *delivery, int su)
460 int i, accept, status=1, won, vecp, next;
461 char *field, *pattern, *action, *result, *string;
462 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
463 char *cp, *vec[NVEC];
468 /* open the delivery file */
469 if ((fp = fopen (delivery, "r")) == NULL)
472 /* check if delivery file has bad ownership or permissions */
473 if (fstat (fileno (fp), &st) == -1
474 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
475 || st.st_mode & (S_IWGRP|S_IWOTH)) {
477 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
478 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
486 /* read and process delivery file */
487 while (fgets (buffer, sizeof(buffer), fp)) {
488 /* skip comments and empty lines */
489 if (*buffer == '#' || *buffer == '\n')
492 /* zap trailing newline */
493 if ((cp = strchr(buffer, '\n')))
496 /* split buffer into fields */
497 vecp = split (buffer, vec);
499 /* check for too few fields */
502 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
507 for (i = 0; vec[i]; i++)
508 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
517 /* find out how to perform the action */
522 * If previous condition failed, don't
523 * do this - else fall through
526 continue; /* else fall */
530 * If already delivered, skip this action. Else
531 * consider delivered if action is successful.
534 continue; /* else fall */
539 * Take action, and consider delivered if
540 * action is successful.
549 * Take action, but don't consider delivered, even
550 * if action is successful
557 if (!strcasecmp (vec[5], "select")) {
558 if (logged_in () != -1)
560 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
565 /* check if the field matches */
573 * "default" matches only if the message hasn't
574 * been delivered yet.
576 if (!strcasecmp (field, "default")) {
583 /* parse message and build lookup table */
584 if (!parsed && parse (fd) == -1) {
589 * find header field in lookup table, and
590 * see if the pattern matches.
592 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
593 && matches (p->p_value, pattern)) {
602 /* find out the action to perform */
605 /* deliver to quoted pipe */
606 if (strcasecmp (action, "qpipe"))
607 continue; /* else fall */
609 expand (tmpbuf, string, fd);
610 if (split (tmpbuf, vec) < 1)
612 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
616 /* deliver to pipe */
617 if (strcasecmp (action, "pipe"))
618 continue; /* else fall */
622 expand (tmpbuf, string, fd);
625 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
630 if (!strcasecmp (action, "file")) {
631 status = usr_file (fd, string, MBOX_FORMAT);
634 /* deliver to nmh folder */
635 else if (strcasecmp (action, "folder"))
636 continue; /* else fall */
638 status = usr_folder (fd, string);
643 if (!strcasecmp (action, "mmdf")) {
644 status = usr_file (fd, string, MMDF_FORMAT);
648 else if (strcasecmp (action, "mbox"))
649 continue; /* else fall */
653 status = usr_file (fd, string, MBOX_FORMAT);
658 if (strcasecmp (action, "destroy"))
664 if (status) next = 0; /* action failed, mark for 'N' result */
666 if (accept && status == 0)
671 return (won ? 0 : -1);
678 * Split buffer into fields (delimited by whitespace or
679 * comma's). Return the number of fields found.
683 split (char *cp, char **vec)
690 /* split into a maximum of NVEC fields */
691 for (i = 0; i <= NVEC;) {
694 /* zap any whitespace and comma's */
695 while (isspace (*s) || *s == ',')
698 /* end of buffer, time to leave */
702 /* get double quote text as a single field */
704 for (vec[i++] = ++s; *s && *s != '"'; s++) {
706 * Check for escaped double quote. We need
707 * to shift the string to remove slash.
715 if (*s == '"') /* zap trailing double quote */
720 if (*s == QUOTE && *++s != '"')
724 /* move forward to next field delimiter */
725 while (*s && !isspace (*s) && *s != ',')
735 * Parse the headers of a message, and build the
736 * lookup table for matching fields and patterns.
745 char name[NAMESZ], field[BUFSIZ];
752 /* get a new FILE pointer to message */
753 if ((fd1 = dup (fd)) == -1)
755 if ((in = fdopen (fd1, "r")) == NULL) {
761 /* add special entries to lookup table */
762 if ((p = lookup (hdrs, "source")))
763 p->p_value = getcpy (sender);
764 if ((p = lookup (hdrs, "addr")))
765 p->p_value = getcpy (addr);
768 * Scan the headers of the message and build
771 for (i = 0, state = FLD;;) {
772 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
776 lp = add (field, NULL);
777 while (state == FLDPLUS) {
778 state = m_getfld (state, name, field, sizeof(field), in);
779 lp = add (field, lp);
781 for (p = hdrs; p->p_name; p++) {
782 if (!strcasecmp (p->p_name, name)) {
783 if (!(p->p_flags & P_HID)) {
784 if ((cp = p->p_value)) {
785 if (p->p_flags & P_ADR) {
786 dp = cp + strlen (cp) - 1;
789 cp = add (",\n\t", cp);
794 p->p_value = add (lp, cp);
800 if (p->p_name == NULL && i < NVEC) {
801 p->p_name = getcpy (name);
818 advise (NULL, "format error in message");
822 advise (NULL, "internal error in m_getfld");
830 if ((p = lookup (vars, "reply-to"))) {
831 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
832 q = lookup (hdrs, "from");
833 p->p_value = getcpy (q ? q->p_value : "");
834 p->p_flags &= ~P_CHK;
836 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
837 p - vars, p->p_name, trim(p->p_value));
840 for (p = hdrs; p->p_name; p++)
841 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
842 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
853 * Expand any builtin variables such as $(sender),
854 * $(address), etc., in a string.
858 expand (char *s1, char *s2, int fd)
866 while ((c = *s2++)) {
867 if (c != '$' || *s2 != LPAREN) {
870 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
877 if ((p = lookup (vars, cp))) {
878 if (!parsed && (p->p_flags & P_CHK))
881 strcpy (s1, p->p_value);
891 * Fill in the information missing from the "vars"
892 * table, which is necessary to expand any builtin
893 * variables in the string for a "pipe" or "qpipe"
907 if ((p = lookup (vars, "sender")))
908 p->p_value = getcpy (sender);
909 if ((p = lookup (vars, "address")))
910 p->p_value = getcpy (addr);
911 if ((p = lookup (vars, "size"))) {
912 snprintf (buffer, sizeof(buffer), "%d",
913 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
914 p->p_value = getcpy (buffer);
916 if ((p = lookup (vars, "info")))
917 p->p_value = getcpy (info);
920 for (p = vars; p->p_name; p++)
921 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
922 p - vars, p->p_name, trim(p->p_value));
928 * Find a matching name in a lookup table. If found,
929 * return the "pairs" entry, else return NULL.
933 lookup (struct pair *pairs, char *key)
935 for (; pairs->p_name; pairs++)
936 if (!strcasecmp (pairs->p_name, key))
944 * Check utmp(x) file to see if user is currently
959 while ((utp = getutent()) != NULL) {
961 #ifdef HAVE_UTMP_UT_TYPE
962 utp->ut_type == USER_PROCESS
966 && strncmp (user, utp->ut_name, sizeof(utp->ut_name)) == 0) {
970 return (utmped = DONE);
975 return (utmped = NOTOK);
987 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
990 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
991 if (ut.ut_name[0] != 0
992 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
996 return (utmped = DONE);
1001 return (utmped = NOTOK);
1005 #define check(t,a,b) if (t < a || t > b) return -1
1006 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
1009 timely (char *t1, char *t2)
1011 int t1hours, t1mins, t2hours, t2mins;
1013 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
1015 check (t1hours, 0, 23);
1016 check (t1mins, 0, 59);
1018 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
1020 check (t2hours, 0, 23);
1021 check (t2mins, 0, 59);
1023 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
1024 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
1031 * Deliver message by appending to a file.
1035 usr_file (int fd, char *mailbox, int mbx_style)
1040 verbose_printf ("delivering to file \"%s\"", mailbox);
1042 if (mbx_style == MBOX_FORMAT) {
1044 verbose_printf (" (mbox style)");
1048 verbose_printf (" (mmdf style)");
1052 /* open and lock the file */
1053 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1055 adorn ("", "unable to open:");
1059 lseek (fd, (off_t) 0, SEEK_SET);
1061 /* append message to file */
1062 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1064 adorn ("", "error writing to:");
1068 /* close and unlock file */
1069 mbx_close (mailbox, md);
1072 verbose_printf (", success.\n");
1078 * Deliver message to a nmh folder.
1082 usr_folder (int fd, char *string)
1085 char folder[BUFSIZ], *vec[3];
1087 /* get folder name ready */
1089 strncpy(folder, string, sizeof(folder));
1091 snprintf(folder, sizeof(folder), "+%s", string);
1094 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1096 vec[0] = "rcvstore";
1100 /* use rcvstore to put message in folder */
1101 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1105 * Currently, verbose status messages are handled by usr_pipe().
1109 verbose_printf (", success.\n");
1111 verbose_printf (", failed.\n");
1119 * Deliver message to a process.
1123 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1126 int i, bytes, seconds, status;
1129 if (verbose && !suppress)
1130 verbose_printf ("delivering to pipe \"%s\"", cmd);
1132 lseek (fd, (off_t) 0, SEEK_SET);
1134 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1141 adorn ("fork", "unable to");
1148 freopen ("/dev/null", "w", stdout);
1149 freopen ("/dev/null", "w", stderr);
1155 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1156 ioctl (fd, TIOCNOTTY, NULL);
1159 #endif /* TIOCNOTTY */
1161 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1164 m_putenv ("USER", pw->pw_name);
1165 m_putenv ("HOME", pw->pw_dir);
1166 m_putenv ("SHELL", pw->pw_shell);
1172 /* parent process */
1173 if (!setjmp (myctx)) {
1174 SIGNAL (SIGALRM, alrmser);
1175 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1177 /* amount of time to wait depends on message size */
1179 /* give at least 5 minutes */
1181 } else if (bytes >= 90000) {
1182 /* a half hour is long enough */
1185 seconds = (bytes / 60) + 300;
1187 alarm ((unsigned int) seconds);
1188 status = pidwait (child_id, 0);
1193 verbose_printf (", success.\n");
1195 if ((status & 0xff00) == 0xff00)
1196 verbose_printf (", system error\n");
1198 pidstatus (status, stdout, ", failed");
1200 return (status == 0 ? 0 : -1);
1203 * Ruthlessly kill the child and anything
1204 * else in its process group.
1206 KILLPG(child_id, SIGKILL);
1208 verbose_printf (", timed-out; terminated\n");
1218 #ifndef RELIABLE_SIGNALS
1219 SIGNAL (SIGALRM, alrmser);
1222 longjmp (myctx, DONE);
1227 * Get the `sender' from the envelope
1228 * information ("From " line).
1232 get_sender (char *envelope, char **sender)
1236 char buffer[BUFSIZ];
1238 if (envelope == NULL) {
1239 *sender = getcpy ("");
1243 i = strlen ("From ");
1244 strncpy (buffer, envelope + i, sizeof(buffer));
1245 if ((cp = strchr(buffer, '\n'))) {
1255 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1260 *sender = getcpy (buffer);
1265 * Copy message into a temporary file.
1266 * While copying, it will do some header processing
1267 * including the extraction of the envelope information.
1271 copy_message (int qd, char *tmpfil, int fold)
1273 int i, first = 1, fd1, fd2;
1274 char buffer[BUFSIZ];
1277 strcpy (tmpfil, m_tmpfil (invo_name));
1279 /* open temporary file to put message in */
1280 if ((fd1 = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == -1)
1284 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1285 if (write (fd1, buffer, i) != i) {
1293 lseek (fd1, (off_t) 0, SEEK_SET);
1297 /* dup the fd for incoming message */
1298 if ((fd2 = dup (qd)) == -1) {
1303 /* now create a FILE pointer for it */
1304 if ((qfp = fdopen (fd2, "r")) == NULL) {
1310 /* dup the fd for temporary file */
1311 if ((fd2 = dup (fd1)) == -1) {
1317 /* now create a FILE pointer for it */
1318 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1326 * copy message into temporary file
1327 * and massage the headers. Save
1328 * a copy of the "From " line for later.
1330 i = strlen ("From ");
1331 while (fgets (buffer, sizeof(buffer), qfp)) {
1334 if (!strncmp (buffer, "From ", i)) {
1336 char *fp, *cp, *hp, *ep;
1338 /* get copy of envelope information ("From " line) */
1339 envelope = getcpy (buffer);
1342 /* First go ahead and put "From " line in message */
1343 fputs (buffer, ffp);
1350 * Now create a "Return-Path:" line
1351 * from the "From " line.
1353 hp = cp = strchr(fp = envelope + i, ' ');
1354 while ((hp = strchr(++hp, 'r')))
1355 if (uprf (hp, "remote from")) {
1356 hp = strrchr(hp, ' ');
1360 /* return path for UUCP style addressing */
1361 ep = strchr(++hp, '\n');
1362 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s!%.*s\n",
1363 ep - hp, hp, cp - fp, fp);
1365 /* return path for standard domain addressing */
1366 snprintf (buffer, sizeof(buffer), "Return-Path: %.*s\n",
1370 /* Add Return-Path header to message */
1371 fputs (buffer, ffp);
1375 /* Put the delivery date in message */
1384 fputs (buffer, ffp);
1396 lseek (fd1, (off_t) 0, SEEK_SET);
1408 * Trim strings for pretty printing of debugging output
1414 char buffer[BUFSIZ*4];
1420 /* copy string into temp buffer */
1421 strncpy (buffer, cp, sizeof(buffer));
1424 /* skip over leading whitespace */
1425 while (isspace(*bp))
1428 /* start at the end and zap trailing whitespace */
1429 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1436 /* replace remaining whitespace with spaces */
1437 for (sp = bp; *sp; sp++)
1441 /* now return a copy */
1446 * Function for printing `verbose' messages.
1450 verbose_printf (char *fmt, ...)
1455 vfprintf (stdout, fmt, ap);
1458 fflush (stdout); /* now flush output */
1463 * Function for printing `verbose' delivery
1468 adorn (char *what, char *fmt, ...)
1474 eindex = errno; /* save the errno */
1475 fprintf (stdout, ", ");
1478 vfprintf (stdout, fmt, ap);
1483 fprintf (stdout, " %s: ", what);
1484 if ((s = strerror (eindex)))
1485 fprintf (stdout, "%s", s);
1487 fprintf (stdout, "Error %d", eindex);
1490 fputc ('\n', stdout);
1496 * Function for printing `debug' messages.
1500 debug_printf (char *fmt, ...)
1505 vfprintf (stderr, fmt, ap);
1511 * Check ndbm/db file(s) to see if the Message-Id of this
1512 * message matches the Message-Id of a previous message,
1513 * so we can discard it. If it doesn't match, we add the
1514 * Message-Id of this message to the ndbm/db file.
1517 suppress_duplicates (int fd, char *file)
1519 int fd1, lockfd, state, result;
1520 char *cp, buf[BUFSIZ], name[NAMESZ];
1525 if ((fd1 = dup (fd)) == -1)
1527 if (!(in = fdopen (fd1, "r"))) {
1533 for (state = FLD;;) {
1534 state = m_getfld (state, name, buf, sizeof(buf), in);
1539 /* Search for the message ID */
1540 if (strcasecmp (name, "Message-ID")) {
1541 while (state == FLDPLUS)
1542 state = m_getfld (state, name, buf, sizeof(buf), in);
1546 cp = add (buf, NULL);
1547 while (state == FLDPLUS) {
1548 state = m_getfld (state, name, buf, sizeof(buf), in);
1551 key.dptr = trimcpy (cp);
1552 key.dsize = strlen (key.dptr) + 1;
1556 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1557 advise (file, "unable to perform dbm_open on");
1563 * Since it is difficult to portable lock a ndbm file,
1564 * we will open and lock the Maildelivery file instead.
1565 * This will fail if your Maildelivery file doesn't
1568 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1569 advise (file, "unable to perform file locking on");
1574 value = dbm_fetch (db, key);
1577 verbose_printf ("Message-ID: %s\n already received on %s",
1581 value.dptr = ddate + sizeof("Delivery-Date:");
1582 value.dsize = strlen(value.dptr) + 1;
1583 if (dbm_store (db, key, value, DBM_INSERT))
1584 advise (file, "possibly corrupt file");
1589 lkclose(lockfd, file);