3 * slocal.c -- asynchronously filter and deliver new mail
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
11 * Under sendmail, users should add the line
13 * "| /usr/local/nmh/lib/slocal"
15 * to their $HOME/.forward file.
19 /* Changed to use getutent() and friends. Assumes that when getutent() exists,
20 * a number of other things also exist. Please check.
21 * Ruud de Rooij <ruud@ruud.org> Sun, 28 May 2000 17:28:55 +0200
25 #include <h/dropsbr.h>
26 #include <h/rcvmail.h>
27 #include <h/signals.h>
34 #include <sys/ioctl.h>
37 /* Hopefully, grp.h declares initgroups(). If we run into a platform
38 where it doesn't, we could consider declaring it here as well. */
41 /* This define is needed for Berkeley db v2 and above to
42 * make the header file expose the 'historical' ndbm APIs.
43 * We define it unconditionally because this is simple and
46 #define DB_DBM_HSEARCH 1
48 #endif /* Use DB_DBM_HSEARCH to prevent warning from gcc -Wunused-macros. */
58 # define UTMP_FILE _PATH_UTMP
60 # define UTMP_FILE "/etc/utmp"
65 static struct swit switches[] = {
67 { "addr address", 0 },
73 { "sender address", 0 },
75 { "mailbox file", 0 },
77 { "home directory", -4 },
81 { "maildelivery file", 0 },
86 #define SUPPRESSDUP 10
88 #define NSUPPRESSDUP 11
89 { "nosuppressdup", 0 },
99 static int globbed = 0; /* have we built "vars" table yet? */
100 static int parsed = 0; /* have we built header field table yet */
101 static int utmped = 0; /* have we scanned umtp(x) file yet */
102 static int suppressdup = 0; /* are we suppressing duplicate messages? */
104 static int verbose = 0;
105 static int debug = 0;
107 static char *addr = NULL;
108 static char *user = NULL;
109 static char *info = NULL;
110 static char *file = NULL;
111 static char *sender = NULL;
112 static char *envelope = NULL; /* envelope information ("From " line) */
113 static char *mbox = NULL;
114 static char *home = NULL;
116 static struct passwd *pw; /* passwd file entry */
118 static char ddate[BUFSIZ]; /* record the delivery date */
121 static jmp_buf myctx;
123 /* flags for pair->p_flags */
125 #define P_ADR 0x01 /* field is address */
126 #define P_HID 0x02 /* special (fake) field */
138 * Lookup table for matching fields and patterns
139 * in messages. The rest of the table is added
140 * when the message is parsed.
142 static struct pair hdrs[NVEC + 1] = {
143 { "source", NULL, P_HID },
144 { "addr", NULL, P_HID },
145 { "Return-Path", NULL, P_ADR },
146 { "Reply-To", NULL, P_ADR },
147 { "From", NULL, P_ADR },
148 { "Sender", NULL, P_ADR },
149 { "To", NULL, P_ADR },
150 { "cc", NULL, P_ADR },
151 { "Resent-Reply-To", NULL, P_ADR },
152 { "Resent-From", NULL, P_ADR },
153 { "Resent-Sender", NULL, P_ADR },
154 { "Resent-To", NULL, P_ADR },
155 { "Resent-cc", NULL, P_ADR },
160 * The list of builtin variables to expand in a string
161 * before it is executed by the "pipe" or "qpipe" action.
163 static struct pair vars[] = {
164 { "sender", NULL, P_NIL },
165 { "address", NULL, P_NIL },
166 { "size", NULL, P_NIL },
167 { "reply-to", NULL, P_CHK },
168 { "info", NULL, P_NIL },
172 extern char **environ;
177 static int localmail (int, char *);
178 static int usr_delivery (int, char *, int);
179 static int split (char *, char **);
180 static int parse (int);
181 static void expand (char *, char *, int);
182 static void glob (int);
183 static struct pair *lookup (struct pair *, char *);
184 static int logged_in (void);
185 static int timely (char *, char *);
186 static int usr_file (int, char *, int);
187 static int usr_pipe (int, char *, char *, char **, int);
188 static int usr_folder (int, char *);
189 static void alrmser (int);
190 static void get_sender (char *, char **);
191 static int copy_message (int, char *, int);
192 static void verbose_printf (char *fmt, ...);
193 static void adorn (char *, char *, ...);
194 static void debug_printf (char *fmt, ...);
195 static int suppress_duplicates (int, char *);
196 static char *trim (char *);
200 main (int argc, char **argv)
204 char *cp, *mdlvr = NULL, buf[BUFSIZ];
205 char mailbox[BUFSIZ], tmpfil[BUFSIZ];
206 char **argp, **arguments;
209 setlocale(LC_ALL, "");
211 invo_name = r1bindex (*argv, '/');
213 /* foil search of user profile/context */
214 if (context_foil (NULL) == -1)
217 mts_init (invo_name);
218 arguments = getarguments (invo_name, argc, argv, 0);
221 /* Parse arguments */
222 while ((cp = *argp++)) {
224 switch (smatch (++cp, switches)) {
226 ambigsw (cp, switches);
229 adios (NULL, "-%s unknown", cp);
232 snprintf (buf, sizeof(buf),
233 "%s [switches] [address info sender]", invo_name);
234 print_help (buf, switches, 0);
237 print_version(invo_name);
241 if (!(addr = *argp++))/* allow -xyz arguments */
242 adios (NULL, "missing argument to %s", argp[-2]);
245 if (!(info = *argp++))/* allow -xyz arguments */
246 adios (NULL, "missing argument to %s", argp[-2]);
249 if (!(user = *argp++))/* allow -xyz arguments */
250 adios (NULL, "missing argument to %s", argp[-2]);
253 if (!(file = *argp++) || *file == '-')
254 adios (NULL, "missing argument to %s", argp[-2]);
257 if (!(sender = *argp++))/* allow -xyz arguments */
258 adios (NULL, "missing argument to %s", argp[-2]);
261 if (!(mbox = *argp++) || *mbox == '-')
262 adios (NULL, "missing argument to %s", argp[-2]);
265 if (!(home = *argp++) || *home == '-')
266 adios (NULL, "missing argument to %s", argp[-2]);
270 if (!(cp = *argp++) || *cp == '-')
271 adios (NULL, "missing argument to %s", argp[-2]);
273 adios (NULL, "only one maildelivery file at a time!");
296 switch (argp - (argv + 1)) {
312 addr = getusername ();
314 user = (cp = strchr(addr, '.')) ? ++cp : addr;
315 if ((pw = getpwnam (user)) == NULL)
316 adios (NULL, "no such local user as %s", user);
318 if (chdir (pw->pw_dir) == -1)
322 if (geteuid() == 0) {
324 initgroups (pw->pw_name, pw->pw_gid);
331 setbuf (stdin, NULL);
333 /* Record the delivery time */
334 if ((now = dlocaltimenow ()) == NULL)
335 adios (NULL, "unable to ascertain local time");
336 snprintf (ddate, sizeof(ddate), "Delivery-Date: %s\n", dtimenow (0));
339 * Copy the message to a temporary file
344 /* getting message from file */
345 if ((tempfd = open (file, O_RDONLY)) == -1)
346 adios (file, "unable to open");
348 debug_printf ("retrieving message from file \"%s\"\n", file);
349 if ((fd = copy_message (tempfd, tmpfil, 1)) == -1)
350 adios (NULL, "unable to create temporary file");
353 /* getting message from stdin */
355 debug_printf ("retrieving message from stdin\n");
356 if ((fd = copy_message (fileno (stdin), tmpfil, 1)) == -1)
357 adios (NULL, "unable to create temporary file");
361 debug_printf ("temporary file=\"%s\"\n", tmpfil);
363 /* Delete the temp file now or a copy of every single message passed through
364 slocal will be left in the /tmp directory until deleted manually! This
365 unlink() used to be under an 'else' of the 'if (debug)' above, but since
366 some people like to always run slocal with -debug and log the results,
367 the /tmp directory would get choked over time. Of course, now that we
368 always delete the temp file, the "temporary file=" message above is
369 somewhat pointless -- someone watching debug output wouldn't have a
370 chance to 'tail -f' or 'ln' the temp file before it's unlinked. The best
371 thing would be to delay this unlink() until later if debug == 1, but I'll
372 leave that for someone who cares about the temp-file-accessing
373 functionality (they'll have to watch out for cases where we adios()). */
376 if (!(fp = fdopen (fd, "r+")))
377 adios (NULL, "unable to access temporary file");
380 * If no sender given, extract it
381 * from envelope information. */
383 get_sender (envelope, &sender);
386 snprintf (mailbox, sizeof(mailbox), "%s/%s",
387 mmdfldir[0] ? mmdfldir : pw->pw_dir,
388 mmdflfil[0] ? mmdflfil : pw->pw_name);
395 debug_printf ("addr=\"%s\"\n", trim(addr));
396 debug_printf ("user=\"%s\"\n", trim(user));
397 debug_printf ("info=\"%s\"\n", trim(info));
398 debug_printf ("sender=\"%s\"\n", trim(sender));
399 debug_printf ("envelope=\"%s\"\n", envelope ? trim(envelope) : "");
400 debug_printf ("mbox=\"%s\"\n", trim(mbox));
401 debug_printf ("home=\"%s\"\n", trim(home));
402 debug_printf ("ddate=\"%s\"\n", trim(ddate));
403 debug_printf ("now=%02d:%02d\n\n", now->tw_hour, now->tw_min);
406 /* deliver the message */
407 status = localmail (fd, mdlvr);
409 done (status != -1 ? RCV_MOK : RCV_MBX);
415 * Main routine for delivering message.
419 localmail (int fd, char *mdlvr)
421 /* check if this message is a duplicate */
423 suppress_duplicates(fd, mdlvr ? mdlvr : ".maildelivery") == DONE)
426 /* delivery according to personal Maildelivery file */
427 if (usr_delivery (fd, mdlvr ? mdlvr : ".maildelivery", 0) != -1)
430 /* delivery according to global Maildelivery file */
431 if (usr_delivery (fd, maildelivery, 1) != -1)
435 verbose_printf ("(delivering to standard mail spool)\n");
437 /* last resort - deliver to standard mail spool */
438 return usr_file (fd, mbox, MBOX_FORMAT);
442 #define matches(a,b) (stringdex (b, a) >= 0)
445 * Parse the delivery file, and process incoming message.
449 usr_delivery (int fd, char *delivery, int su)
451 int i, accept, status=1, won, vecp, next;
452 char *field, *pattern, *action, *result, *string;
453 char buffer[BUFSIZ], tmpbuf[BUFSIZ];
454 char *cp, *vec[NVEC];
459 /* open the delivery file */
460 if ((fp = fopen (delivery, "r")) == NULL)
463 /* check if delivery file has bad ownership or permissions */
464 if (fstat (fileno (fp), &st) == -1
465 || (st.st_uid != 0 && (su || st.st_uid != pw->pw_uid))
466 || st.st_mode & (S_IWGRP|S_IWOTH)) {
468 verbose_printf ("WARNING: %s has bad ownership/modes (su=%d,uid=%d,owner=%d,mode=0%o)\n",
469 delivery, su, (int) pw->pw_uid, (int) st.st_uid, (int) st.st_mode);
477 /* read and process delivery file */
478 while (fgets (buffer, sizeof(buffer), fp)) {
479 /* skip comments and empty lines */
480 if (*buffer == '#' || *buffer == '\n')
483 /* zap trailing newline */
484 if ((cp = strchr(buffer, '\n')))
487 /* split buffer into fields */
488 vecp = split (buffer, vec);
490 /* check for too few fields */
493 debug_printf ("WARNING: entry with only %d fields, skipping.\n", vecp);
498 for (i = 0; vec[i]; i++)
499 debug_printf ("vec[%d]: \"%s\"\n", i, trim(vec[i]));
508 /* find out how to perform the action */
513 * If previous condition failed, don't
514 * do this - else fall through
517 continue; /* else fall */
521 * If already delivered, skip this action. Else
522 * consider delivered if action is successful.
525 continue; /* else fall */
530 * Take action, and consider delivered if
531 * action is successful.
540 * Take action, but don't consider delivered, even
541 * if action is successful
548 if (!mh_strcasecmp (vec[5], "select")) {
549 if (logged_in () != -1)
551 if (vecp > 7 && timely (vec[6], vec[7]) == -1)
556 /* check if the field matches */
564 * "default" matches only if the message hasn't
565 * been delivered yet.
567 if (!mh_strcasecmp (field, "default")) {
574 /* parse message and build lookup table */
575 if (!parsed && parse (fd) == -1) {
580 * find header field in lookup table, and
581 * see if the pattern matches.
583 if ((p = lookup (hdrs, field)) && (p->p_value != NULL)
584 && matches (p->p_value, pattern)) {
593 /* find out the action to perform */
596 /* deliver to quoted pipe */
597 if (mh_strcasecmp (action, "qpipe"))
598 continue; /* else fall */
600 expand (tmpbuf, string, fd);
601 if (split (tmpbuf, vec) < 1)
603 status = usr_pipe (fd, tmpbuf, vec[0], vec, 0);
607 /* deliver to pipe */
608 if (mh_strcasecmp (action, "pipe"))
609 continue; /* else fall */
613 expand (tmpbuf, string, fd);
616 status = usr_pipe (fd, tmpbuf, "/bin/sh", vec + 2, 0);
621 if (!mh_strcasecmp (action, "file")) {
622 status = usr_file (fd, string, MBOX_FORMAT);
625 /* deliver to nmh folder */
626 else if (mh_strcasecmp (action, "folder"))
627 continue; /* else fall */
629 status = usr_folder (fd, string);
634 if (!mh_strcasecmp (action, "mmdf")) {
635 status = usr_file (fd, string, MMDF_FORMAT);
639 else if (mh_strcasecmp (action, "mbox"))
640 continue; /* else fall */
644 status = usr_file (fd, string, MBOX_FORMAT);
649 if (mh_strcasecmp (action, "destroy"))
655 if (status) next = 0; /* action failed, mark for 'N' result */
657 if (accept && status == 0)
662 return (won ? 0 : -1);
669 * Split buffer into fields (delimited by whitespace or
670 * comma's). Return the number of fields found.
674 split (char *cp, char **vec)
681 /* split into a maximum of NVEC fields */
682 for (i = 0; i <= NVEC;) {
685 /* zap any whitespace and comma's */
686 while (isspace (*s) || *s == ',')
689 /* end of buffer, time to leave */
693 /* get double quote text as a single field */
695 for (vec[i++] = ++s; *s && *s != '"'; s++) {
697 * Check for escaped double quote. We need
698 * to shift the string to remove slash.
706 if (*s == '"') /* zap trailing double quote */
711 if (*s == QUOTE && *++s != '"')
715 /* move forward to next field delimiter */
716 while (*s && !isspace (*s) && *s != ',')
726 * Parse the headers of a message, and build the
727 * lookup table for matching fields and patterns.
736 char name[NAMESZ], field[BUFSIZ];
743 /* get a new FILE pointer to message */
744 if ((fd1 = dup (fd)) == -1)
746 if ((in = fdopen (fd1, "r")) == NULL) {
752 /* add special entries to lookup table */
753 if ((p = lookup (hdrs, "source")))
754 p->p_value = getcpy (sender);
755 if ((p = lookup (hdrs, "addr")))
756 p->p_value = getcpy (addr);
759 * Scan the headers of the message and build
762 for (i = 0, state = FLD;;) {
763 switch (state = m_getfld (state, name, field, sizeof(field), in)) {
767 lp = add (field, NULL);
768 while (state == FLDPLUS) {
769 state = m_getfld (state, name, field, sizeof(field), in);
770 lp = add (field, lp);
772 for (p = hdrs; p->p_name; p++) {
773 if (!mh_strcasecmp (p->p_name, name)) {
774 if (!(p->p_flags & P_HID)) {
775 if ((cp = p->p_value)) {
776 if (p->p_flags & P_ADR) {
777 dp = cp + strlen (cp) - 1;
780 cp = add (",\n\t", cp);
785 p->p_value = add (lp, cp);
791 if (p->p_name == NULL && i < NVEC) {
792 p->p_name = getcpy (name);
809 advise (NULL, "format error in message");
813 advise (NULL, "internal error in m_getfld");
821 if ((p = lookup (vars, "reply-to"))) {
822 if ((q = lookup (hdrs, "reply-to")) == NULL || q->p_value == NULL)
823 q = lookup (hdrs, "from");
824 p->p_value = getcpy (q ? q->p_value : "");
825 p->p_flags &= ~P_CHK;
827 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
828 p - vars, p->p_name, trim(p->p_value));
831 for (p = hdrs; p->p_name; p++)
832 debug_printf ("hdrs[%d]: name=\"%s\" value=\"%s\"\n",
833 p - hdrs, p->p_name, p->p_value ? trim(p->p_value) : "");
844 * Expand any builtin variables such as $(sender),
845 * $(address), etc., in a string.
849 expand (char *s1, char *s2, int fd)
857 while ((c = *s2++)) {
858 if (c != '$' || *s2 != LPAREN) {
861 for (cp = ++s2; *s2 && *s2 != RPAREN; s2++)
868 if ((p = lookup (vars, cp))) {
869 if (!parsed && (p->p_flags & P_CHK))
872 strcpy (s1, p->p_value);
882 * Fill in the information missing from the "vars"
883 * table, which is necessary to expand any builtin
884 * variables in the string for a "pipe" or "qpipe"
898 if ((p = lookup (vars, "sender")))
899 p->p_value = getcpy (sender);
900 if ((p = lookup (vars, "address")))
901 p->p_value = getcpy (addr);
902 if ((p = lookup (vars, "size"))) {
903 snprintf (buffer, sizeof(buffer), "%d",
904 fstat (fd, &st) != -1 ? (int) st.st_size : 0);
905 p->p_value = getcpy (buffer);
907 if ((p = lookup (vars, "info")))
908 p->p_value = getcpy (info);
911 for (p = vars; p->p_name; p++)
912 debug_printf ("vars[%d]: name=\"%s\" value=\"%s\"\n",
913 p - vars, p->p_name, trim(p->p_value));
919 * Find a matching name in a lookup table. If found,
920 * return the "pairs" entry, else return NULL.
924 lookup (struct pair *pairs, char *key)
926 for (; pairs->p_name; pairs++)
927 if (!mh_strcasecmp (pairs->p_name, key))
935 * Check utmp(x) file to see if user is currently
950 while ((utp = getutent()) != NULL) {
952 #ifdef HAVE_STRUCT_UTMP_UT_TYPE
953 utp->ut_type == USER_PROCESS
957 && strncmp (user, utp->ut_name, sizeof(utp->ut_name)) == 0) {
961 return (utmped = DONE);
966 return (utmped = NOTOK);
978 if ((uf = fopen (UTMP_FILE, "r")) == NULL)
981 while (fread ((char *) &ut, sizeof(ut), 1, uf) == 1) {
982 if (ut.ut_name[0] != 0
983 && strncmp (user, ut.ut_name, sizeof(ut.ut_name)) == 0) {
987 return (utmped = DONE);
992 return (utmped = NOTOK);
996 #define check(t,a,b) if (t < a || t > b) return -1
997 #define cmpar(h1,m1,h2,m2) if (h1 < h2 || (h1 == h2 && m1 < m2)) return 0
1000 timely (char *t1, char *t2)
1002 int t1hours, t1mins, t2hours, t2mins;
1004 if (sscanf (t1, "%d:%d", &t1hours, &t1mins) != 2)
1006 check (t1hours, 0, 23);
1007 check (t1mins, 0, 59);
1009 if (sscanf (t2, "%d:%d", &t2hours, &t2mins) != 2)
1011 check (t2hours, 0, 23);
1012 check (t2mins, 0, 59);
1014 cmpar (now->tw_hour, now->tw_min, t1hours, t1mins);
1015 cmpar (t2hours, t2mins, now->tw_hour, now->tw_min);
1022 * Deliver message by appending to a file.
1026 usr_file (int fd, char *mailbox, int mbx_style)
1031 verbose_printf ("delivering to file \"%s\"", mailbox);
1033 if (mbx_style == MBOX_FORMAT) {
1035 verbose_printf (" (mbox style)");
1039 verbose_printf (" (mmdf style)");
1043 /* open and lock the file */
1044 if ((md = mbx_open (mailbox, mbx_style, pw->pw_uid, pw->pw_gid, m_gmprot())) == -1) {
1046 adorn ("", "unable to open:");
1050 lseek (fd, (off_t) 0, SEEK_SET);
1052 /* append message to file */
1053 if (mbx_copy (mailbox, mbx_style, md, fd, mapping, NULL, verbose) == -1) {
1055 adorn ("", "error writing to:");
1059 /* close and unlock file */
1060 if (mbx_close (mailbox, md) == NOTOK) {
1062 adorn ("", "error closing:");
1067 verbose_printf (", success.\n");
1073 * Deliver message to a nmh folder.
1077 usr_folder (int fd, char *string)
1080 char folder[BUFSIZ], *vec[3];
1082 /* get folder name ready */
1084 strncpy(folder, string, sizeof(folder));
1086 snprintf(folder, sizeof(folder), "+%s", string);
1089 verbose_printf ("delivering to folder \"%s\"", folder + 1);
1091 vec[0] = "rcvstore";
1095 /* use rcvstore to put message in folder */
1096 status = usr_pipe (fd, "rcvstore", rcvstoreproc, vec, 1);
1100 * Currently, verbose status messages are handled by usr_pipe().
1104 verbose_printf (", success.\n");
1106 verbose_printf (", failed.\n");
1114 * Deliver message to a process.
1118 usr_pipe (int fd, char *cmd, char *pgm, char **vec, int suppress)
1121 int i, bytes, seconds, status;
1124 if (verbose && !suppress)
1125 verbose_printf ("delivering to pipe \"%s\"", cmd);
1127 lseek (fd, (off_t) 0, SEEK_SET);
1129 for (i = 0; (child_id = fork()) == -1 && i < 5; i++)
1136 adorn ("fork", "unable to");
1143 freopen ("/dev/null", "w", stdout);
1144 freopen ("/dev/null", "w", stderr);
1150 if ((fd = open ("/dev/tty", O_RDWR)) != -1) {
1151 ioctl (fd, TIOCNOTTY, NULL);
1154 #endif /* TIOCNOTTY */
1156 setpgid ((pid_t) 0, getpid ()); /* put in own process group */
1159 m_putenv ("USER", pw->pw_name);
1160 m_putenv ("HOME", pw->pw_dir);
1161 m_putenv ("SHELL", pw->pw_shell);
1167 /* parent process */
1168 if (!setjmp (myctx)) {
1169 SIGNAL (SIGALRM, alrmser);
1170 bytes = fstat (fd, &st) != -1 ? (int) st.st_size : 100;
1172 /* amount of time to wait depends on message size */
1174 /* give at least 5 minutes */
1176 } else if (bytes >= 90000) {
1177 /* a half hour is long enough */
1180 seconds = (bytes / 60) + 300;
1182 alarm ((unsigned int) seconds);
1183 status = pidwait (child_id, 0);
1188 verbose_printf (", success.\n");
1190 if ((status & 0xff00) == 0xff00)
1191 verbose_printf (", system error\n");
1193 pidstatus (status, stdout, ", failed");
1195 return (status == 0 ? 0 : -1);
1198 * Ruthlessly kill the child and anything
1199 * else in its process group.
1201 killpg(child_id, SIGKILL);
1203 verbose_printf (", timed-out; terminated\n");
1213 longjmp (myctx, DONE);
1218 * Get the `sender' from the envelope
1219 * information ("From " line).
1223 get_sender (char *envelope, char **sender)
1227 unsigned char buffer[BUFSIZ];
1229 if (envelope == NULL) {
1230 *sender = getcpy ("");
1234 i = strlen ("From ");
1235 strncpy (buffer, envelope + i, sizeof(buffer));
1236 if ((cp = strchr(buffer, '\n'))) {
1246 for (cp = buffer + strlen (buffer) - 1; cp >= buffer; cp--)
1251 *sender = getcpy (buffer);
1256 * Copy message into a temporary file.
1257 * While copying, it will do some header processing
1258 * including the extraction of the envelope information.
1262 copy_message (int qd, char *tmpfil, int fold)
1264 int i, first = 1, fd1, fd2;
1265 char buffer[BUFSIZ];
1269 tfile = m_mktemp2(NULL, invo_name, &fd1, NULL);
1270 if (tfile == NULL) return -1;
1272 strncpy (tmpfil, tfile, BUFSIZ);
1275 while ((i = read (qd, buffer, sizeof(buffer))) > 0)
1276 if (write (fd1, buffer, i) != i) {
1284 lseek (fd1, (off_t) 0, SEEK_SET);
1288 /* dup the fd for incoming message */
1289 if ((fd2 = dup (qd)) == -1) {
1294 /* now create a FILE pointer for it */
1295 if ((qfp = fdopen (fd2, "r")) == NULL) {
1301 /* dup the fd for temporary file */
1302 if ((fd2 = dup (fd1)) == -1) {
1308 /* now create a FILE pointer for it */
1309 if ((ffp = fdopen (fd2, "r+")) == NULL) {
1317 * copy message into temporary file
1318 * and massage the headers. Save
1319 * a copy of the "From " line for later.
1321 i = strlen ("From ");
1322 while (fgets (buffer, sizeof(buffer), qfp)) {
1325 if (!strncmp (buffer, "From ", i)) {
1326 /* get copy of envelope information ("From " line) */
1327 envelope = getcpy (buffer);
1330 /* First go ahead and put "From " line in message */
1331 fputs (buffer, ffp);
1336 /* Put the delivery date in message */
1345 fputs (buffer, ffp);
1357 lseek (fd1, (off_t) 0, SEEK_SET);
1369 * Trim strings for pretty printing of debugging output
1375 char buffer[BUFSIZ*4];
1376 unsigned char *bp, *sp;
1381 /* copy string into temp buffer */
1382 strncpy (buffer, cp, sizeof(buffer));
1385 /* skip over leading whitespace */
1386 while (isspace(*bp))
1389 /* start at the end and zap trailing whitespace */
1390 for (sp = bp + strlen(bp) - 1; sp >= bp; sp--) {
1397 /* replace remaining whitespace with spaces */
1398 for (sp = bp; *sp; sp++)
1402 /* now return a copy */
1407 * Function for printing `verbose' messages.
1411 verbose_printf (char *fmt, ...)
1416 vfprintf (stdout, fmt, ap);
1419 fflush (stdout); /* now flush output */
1424 * Function for printing `verbose' delivery
1429 adorn (char *what, char *fmt, ...)
1435 eindex = errno; /* save the errno */
1436 fprintf (stdout, ", ");
1439 vfprintf (stdout, fmt, ap);
1444 fprintf (stdout, " %s: ", what);
1445 if ((s = strerror (eindex)))
1446 fprintf (stdout, "%s", s);
1448 fprintf (stdout, "Error %d", eindex);
1451 fputc ('\n', stdout);
1457 * Function for printing `debug' messages.
1461 debug_printf (char *fmt, ...)
1466 vfprintf (stderr, fmt, ap);
1472 * Check ndbm/db file(s) to see if the Message-Id of this
1473 * message matches the Message-Id of a previous message,
1474 * so we can discard it. If it doesn't match, we add the
1475 * Message-Id of this message to the ndbm/db file.
1478 suppress_duplicates (int fd, char *file)
1480 int fd1, lockfd, state, result;
1481 char *cp, buf[BUFSIZ], name[NAMESZ];
1486 if ((fd1 = dup (fd)) == -1)
1488 if (!(in = fdopen (fd1, "r"))) {
1494 for (state = FLD;;) {
1495 state = m_getfld (state, name, buf, sizeof(buf), in);
1500 /* Search for the message ID */
1501 if (mh_strcasecmp (name, "Message-ID")) {
1502 while (state == FLDPLUS)
1503 state = m_getfld (state, name, buf, sizeof(buf), in);
1507 cp = add (buf, NULL);
1508 while (state == FLDPLUS) {
1509 state = m_getfld (state, name, buf, sizeof(buf), in);
1512 key.dptr = trimcpy (cp);
1513 key.dsize = strlen (key.dptr) + 1;
1517 if (!(db = dbm_open (file, O_RDWR | O_CREAT, 0600))) {
1518 advise (file, "unable to perform dbm_open on");
1524 * Since it is difficult to portable lock a ndbm file,
1525 * we will open and lock the Maildelivery file instead.
1526 * This will fail if your Maildelivery file doesn't
1529 if ((lockfd = lkopen(file, O_RDWR, 0)) == -1) {
1530 advise (file, "unable to perform file locking on");
1535 value = dbm_fetch (db, key);
1538 verbose_printf ("Message-ID: %s\n already received on %s",
1542 value.dptr = ddate + sizeof("Delivery-Date:");
1543 value.dsize = strlen(value.dptr) + 1;
1544 if (dbm_store (db, key, value, DBM_INSERT))
1545 advise (file, "possibly corrupt file");
1550 lkclose(lockfd, file);