2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)msgs.c 8.2 (Berkeley) 4/28/95
31 * $FreeBSD: src/usr.bin/msgs/msgs.c,v 1.15.2.2 2003/02/11 21:31:56 mike Exp $
32 * $DragonFly: src/usr.bin/msgs/msgs.c,v 1.7 2007/11/25 18:10:07 swildner Exp $
36 * msgs - a user bulletin board program
39 * msgs [fhlopq] [[-]number] to read messages
40 * msgs -s to place messages
41 * msgs -c [-days] to clean up the bulletin board
43 * prompt commands are:
45 * n flush message, go to next message
46 * q flush message, quit
47 * p print message, turn on 'pipe thru more' mode
48 * P print message, turn off 'pipe thru more' mode
49 * - reprint last message
50 * s[-][<num>] [<filename>] save message
51 * m[-][<num>] mail with message in temp mbox
52 * x exit without flushing this message
53 * <num> print message number <num>
56 #define V7 /* will look for TERM in the environment */
57 #define OBJECT /* will object to messages without Subjects */
58 /* #define REJECT */ /* will reject messages without Subjects
59 (OBJECT must be defined also) */
60 /* #define UNBUFFERED *//* use unbuffered output */
62 #include <sys/param.h>
80 #include "pathnames.h"
82 #define CMODE 0644 /* bounds file creation mode */
85 #define SUPERUSER 0 /* superuser uid */
86 #define DAEMON 1 /* daemon uid */
87 #define NLINES 24 /* default number of lines/crt screen */
88 #define NDAYS 21 /* default keep time for messages */
89 #define DAYS *24*60*60 /* seconds/day */
90 #define MSGSRC ".msgsrc" /* user's rc file */
91 #define BOUNDS "bounds" /* message bounds file */
92 #define NEXT "Next message? [yq]"
93 #define MORE "More? [ynq]"
94 #define NOMORE "(No more) [q] ?"
100 const char *sep = "-";
102 char fname[MAXPATHLEN];
103 char cmdbuf[MAXPATHLEN + MAXPATHLEN];
129 /* option initialization */
141 void ask(const char *);
145 char *nxtfld(unsigned char *);
149 static void usage(void);
152 main(int argc, char **argv)
155 int rcfirst = 0; /* first message to print (from .rc) */
156 int rcback = 0; /* amount to back off of rcfirst */
157 int firstmsg = 0, nextmsg = 0, lastmsg = 0;
159 struct stat buf; /* stat to check access of bounds */
163 setbuf(stdout, NULL);
165 setlocale(LC_ALL, "");
168 setuid(uid = getuid());
169 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
171 signal(SIGINT, SIG_DFL);
175 if (isdigit(argv[0][0])) { /* starting message # */
176 rcfirst = atoi(argv[0]);
178 else if (isdigit(argv[0][1])) { /* backward offset */
179 rcback = atoi( &( argv[0][1] ) );
183 while (*ptr) switch (*ptr++) {
189 if (uid != SUPERUSER && uid != DAEMON) {
190 fprintf(stderr, "Sorry\n");
196 case 'f': /* silently */
200 case 'h': /* headers only */
204 case 'l': /* local msgs only */
208 case 'o': /* option to save last message */
212 case 'p': /* pipe thru 'more' during long msgs */
216 case 'q': /* query only */
220 case 's': /* sending TO msgs */
232 * determine current message bounds
234 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS);
237 * Test access rights to the bounds file
238 * This can be a little tricky. if(send_msg), then
239 * we will create it. We assume that if(send_msg),
240 * then you have write permission there.
241 * Else, it better be there, or we bail.
243 if (send_msg != YES) {
244 if (stat(fname, &buf) < 0) {
246 err(errno, "%s", fname);
252 bounds = fopen(fname, "r");
254 if (bounds != NULL) {
255 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
257 blast = lastmsg; /* save upper bound */
261 keep = t - (rcback? rcback : NDAYS) DAYS;
263 if (clean || bounds == NULL) { /* relocate message bounds */
269 dirp = opendir(_PATH_MSGS);
271 err(errno, "%s", _PATH_MSGS);
276 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
277 char *cp = dp->d_name;
284 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp);
287 i = i * 10 + *cp++ - '0';
289 continue; /* not a message! */
292 if (stat(inbuf, &stbuf) != 0)
294 if (stbuf.st_mtime < keep
295 && stbuf.st_mode&S_IWRITE) {
310 if (blast != 0) /* never lower the upper bound! */
312 firstmsg = lastmsg + 1;
314 else if (blast > lastmsg)
318 bounds = fopen(fname, "w");
320 err(errno, "%s", fname);
322 fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
329 * Send mode - place msgs in _PATH_MSGS
331 bounds = fopen(fname, "w");
333 err(errno, "%s", fname);
335 nextmsg = lastmsg + 1;
336 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg);
337 newmsg = fopen(fname, "w");
339 err(errno, "%s", fname);
342 fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
347 signal(SIGINT, onintr);
349 if (isatty(fileno(stdin))) {
350 ptr = getpwuid(uid)->pw_name;
351 printf("Message %d:\nFrom %s %sSubject: ",
352 nextmsg, ptr, ctime(&t));
354 fgets(inbuf, sizeof inbuf, stdin);
357 fprintf(newmsg, "From %s %sSubject: %s\n",
358 ptr, ctime(&t), inbuf);
359 blankline = seensubj = YES;
362 blankline = seensubj = NO;
364 fgets(inbuf, sizeof inbuf, stdin);
365 if (feof(stdin) || ferror(stdin))
367 blankline = (blankline || (inbuf[0] == '\n'));
368 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
369 fputs(inbuf, newmsg);
373 printf("NOTICE: Messages should have a Subject field!\n");
386 * prepare to display messages
388 totty = (isatty(fileno(stdout)) != 0);
389 use_pager = use_pager && totty;
391 snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), MSGSRC);
392 msgsrc = fopen(fname, "r");
395 fscanf(msgsrc, "%d\n", &nextmsg);
397 if (nextmsg > lastmsg+1) {
398 printf("Warning: bounds have been reset (%d, %d)\n",
400 truncate(fname, (off_t)0);
404 rcfirst = nextmsg - rcback;
408 msgsrc = fopen(fname, "r+");
410 msgsrc = fopen(fname, "w");
412 err(errno, "%s", fname);
414 if (rcfirst > lastmsg+1) {
415 printf("Warning: the last message is number %d.\n",
419 if (rcfirst > firstmsg)
420 firstmsg = rcfirst; /* don't set below first msg */
424 fseek(msgsrc, 0L, 0);
425 fprintf(msgsrc, "%d\n", nextmsg);
432 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
435 if (tgetent(inbuf, getenv("TERM")) <= 0
436 || (Lpp = tgetnum("li")) <= 0) {
442 Lpp -= 6; /* for headers, etc. */
448 signal(SIGINT, onintr);
453 for (msg = firstmsg; msg <= lastmsg; msg++) {
455 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg);
456 newmsg = fopen(fname, "r");
460 gfrsub(newmsg); /* get From and Subject fields */
461 if (locomode && !local) {
466 if (qopt) { /* This has to be located here */
467 printf("There are new messages.\n");
471 if (already && !hdrs)
478 signal(SIGTSTP, onsusp);
479 (void) setjmp(tstpbuf);
483 printf("Message %d:\nFrom %s %s", msg, from, date);
487 printf("Subject: %s", subj);
496 && fgets(inbuf, sizeof inbuf, newmsg)
497 && inbuf[0] != '\n') {
498 fputs(inbuf, stdout);
503 lct = linecnt(newmsg);
505 printf("(%d%sline%s) ", lct, seensubj? " " : " more ",
506 (lct == 1) ? "" : "s");
515 * Ask user for command
518 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
522 signal(SIGTSTP, SIG_DFL);
533 printf("--Postponed--\n");
535 /* intentional fall-thru */
538 if (msg >= nextmsg) sep = "Flushed";
544 use_pager = (*in++ == 'p');
545 /* intentional fallthru */
560 prmesg(nlines + lct + (seensubj? 1 : 0));
565 printf("--%s--\n", sep);
567 if (msg >= nextmsg) {
569 fseek(msgsrc, 0L, 0);
570 fprintf(msgsrc, "%d\n", nextmsg);
580 * Make sure .rc file gets updated
582 if (--msg >= nextmsg) {
584 fseek(msgsrc, 0L, 0);
585 fprintf(msgsrc, "%d\n", nextmsg);
588 if (already && !quitit && lastcmd && totty) {
590 * save or reply to last message?
594 if (inbuf[0] == '-' || isdigit(inbuf[0]))
597 if (!(already || hush || qopt))
598 printf("No new messages.\n");
605 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n");
615 if (use_pager && length > Lpp) {
616 signal(SIGPIPE, SIG_IGN);
617 signal(SIGQUIT, SIG_IGN);
618 if ((env_pager = getenv("PAGER")) == NULL) {
619 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp);
621 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager);
623 outf = popen(cmdbuf, "w");
635 while (fgets(inbuf, sizeof inbuf, newmsg)) {
643 if (outf != stdout) {
645 signal(SIGPIPE, SIG_DFL);
646 signal(SIGQUIT, SIG_DFL);
652 /* force wait on output */
653 tcdrain(fileno(stdout));
657 onintr(int unused __unused)
659 signal(SIGINT, onintr);
673 fseek(newmsg, 0L, 2);
679 * We have just gotten a susp. Suspend and prepare to resume.
682 onsusp(int unused __unused)
684 signal(SIGTSTP, SIG_DFL);
687 signal(SIGTSTP, onsusp);
695 off_t oldpos = ftell(f);
699 while (fgets(lbuf, sizeof lbuf, f))
710 sscanf(buf, "%d", &i);
711 sprintf(buf, "Goto %d", i);
716 ask(const char *prompt)
723 printf("%s ", prompt);
726 (void) fgets(inbuf, sizeof inbuf, stdin);
727 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
733 * Handle 'mail' and 'save' here.
735 if ((inch = inbuf[0]) == 's' || inch == 'm') {
738 else if (isdigit(inbuf[1]))
739 cmsg = atoi(&inbuf[1]);
742 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg);
744 oldpos = ftell(newmsg);
746 cpfrom = fopen(fname, "r");
748 printf("Message %d not found\n", cmsg);
756 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
762 strcpy(fname, "Messages");
763 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND);
766 strcpy(fname, _PATH_TMP);
769 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL,
774 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) {
779 fseek(newmsg, oldpos, 0);
784 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)))
785 fwrite(inbuf, 1, n, cpto);
789 fseek(newmsg, oldpos, 0); /* reposition current message */
791 printf("Message %d saved in \"%s\"\n", cmsg, fname);
807 seensubj = seenfrom = NO;
809 subj[0] = from[0] = date[0] = '\0';
812 * Is this a normal message?
814 if (fgets(inbuf, sizeof inbuf, infile)) {
815 if (strncmp(inbuf, "From", 4)==0) {
817 * expected form starts with From
820 frompos = ftell(infile);
824 count = sizeof(from) - 1;
825 while (*in && *in > ' ' && count-- > 0) {
826 if (*in == ':' || *in == '@' ||
833 if (*(in = nxtfld(in)))
834 strncpy(date, in, sizeof date);
842 * not the expected form
844 fseek(infile, 0L, 0);
855 * look for Subject line until EOF or a blank line
857 while (fgets(inbuf, sizeof inbuf, infile)
858 && !(blankline = (inbuf[0] == '\n'))) {
860 * extract Subject line
862 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
864 frompos = ftell(infile);
865 strncpy(subj, nxtfld(inbuf), sizeof subj);
872 fseek(infile, frompos, 0);
876 * for possible use with Mail
878 strncpy(subj, "(No Subject)\n", sizeof subj);
882 nxtfld(unsigned char *s)
884 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */
885 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */