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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)msgs.c 8.2 (Berkeley) 4/28/95
35 * $FreeBSD: src/usr.bin/msgs/msgs.c,v 1.15.2.2 2003/02/11 21:31:56 mike Exp $
36 * $DragonFly: src/usr.bin/msgs/msgs.c,v 1.7 2007/11/25 18:10:07 swildner Exp $
40 * msgs - a user bulletin board program
43 * msgs [fhlopq] [[-]number] to read messages
44 * msgs -s to place messages
45 * msgs -c [-days] to clean up the bulletin board
47 * prompt commands are:
49 * n flush message, go to next message
50 * q flush message, quit
51 * p print message, turn on 'pipe thru more' mode
52 * P print message, turn off 'pipe thru more' mode
53 * - reprint last message
54 * s[-][<num>] [<filename>] save message
55 * m[-][<num>] mail with message in temp mbox
56 * x exit without flushing this message
57 * <num> print message number <num>
60 #define V7 /* will look for TERM in the environment */
61 #define OBJECT /* will object to messages without Subjects */
62 /* #define REJECT */ /* will reject messages without Subjects
63 (OBJECT must be defined also) */
64 /* #define UNBUFFERED *//* use unbuffered output */
66 #include <sys/param.h>
84 #include "pathnames.h"
86 #define CMODE 0644 /* bounds file creation mode */
89 #define SUPERUSER 0 /* superuser uid */
90 #define DAEMON 1 /* daemon uid */
91 #define NLINES 24 /* default number of lines/crt screen */
92 #define NDAYS 21 /* default keep time for messages */
93 #define DAYS *24*60*60 /* seconds/day */
94 #define MSGSRC ".msgsrc" /* user's rc file */
95 #define BOUNDS "bounds" /* message bounds file */
96 #define NEXT "Next message? [yq]"
97 #define MORE "More? [ynq]"
98 #define NOMORE "(No more) [q] ?"
104 const char *sep = "-";
106 char fname[MAXPATHLEN];
107 char cmdbuf[MAXPATHLEN + MAXPATHLEN];
133 /* option initialization */
145 void ask(const char *);
149 char *nxtfld(unsigned char *);
153 static void usage(void);
156 main(int argc, char **argv)
159 int rcfirst = 0; /* first message to print (from .rc) */
160 int rcback = 0; /* amount to back off of rcfirst */
161 int firstmsg = 0, nextmsg = 0, lastmsg = 0;
163 struct stat buf; /* stat to check access of bounds */
167 setbuf(stdout, NULL);
169 setlocale(LC_ALL, "");
172 setuid(uid = getuid());
173 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
175 signal(SIGINT, SIG_DFL);
179 if (isdigit(argv[0][0])) { /* starting message # */
180 rcfirst = atoi(argv[0]);
182 else if (isdigit(argv[0][1])) { /* backward offset */
183 rcback = atoi( &( argv[0][1] ) );
187 while (*ptr) switch (*ptr++) {
193 if (uid != SUPERUSER && uid != DAEMON) {
194 fprintf(stderr, "Sorry\n");
200 case 'f': /* silently */
204 case 'h': /* headers only */
208 case 'l': /* local msgs only */
212 case 'o': /* option to save last message */
216 case 'p': /* pipe thru 'more' during long msgs */
220 case 'q': /* query only */
224 case 's': /* sending TO msgs */
236 * determine current message bounds
238 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS);
241 * Test access rights to the bounds file
242 * This can be a little tricky. if(send_msg), then
243 * we will create it. We assume that if(send_msg),
244 * then you have write permission there.
245 * Else, it better be there, or we bail.
247 if (send_msg != YES) {
248 if (stat(fname, &buf) < 0) {
250 err(errno, "%s", fname);
256 bounds = fopen(fname, "r");
258 if (bounds != NULL) {
259 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
261 blast = lastmsg; /* save upper bound */
265 keep = t - (rcback? rcback : NDAYS) DAYS;
267 if (clean || bounds == NULL) { /* relocate message bounds */
273 dirp = opendir(_PATH_MSGS);
275 err(errno, "%s", _PATH_MSGS);
280 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
281 char *cp = dp->d_name;
288 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp);
291 i = i * 10 + *cp++ - '0';
293 continue; /* not a message! */
296 if (stat(inbuf, &stbuf) != 0)
298 if (stbuf.st_mtime < keep
299 && stbuf.st_mode&S_IWRITE) {
314 if (blast != 0) /* never lower the upper bound! */
316 firstmsg = lastmsg + 1;
318 else if (blast > lastmsg)
322 bounds = fopen(fname, "w");
324 err(errno, "%s", fname);
326 fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
333 * Send mode - place msgs in _PATH_MSGS
335 bounds = fopen(fname, "w");
337 err(errno, "%s", fname);
339 nextmsg = lastmsg + 1;
340 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg);
341 newmsg = fopen(fname, "w");
343 err(errno, "%s", fname);
346 fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
351 signal(SIGINT, onintr);
353 if (isatty(fileno(stdin))) {
354 ptr = getpwuid(uid)->pw_name;
355 printf("Message %d:\nFrom %s %sSubject: ",
356 nextmsg, ptr, ctime(&t));
358 fgets(inbuf, sizeof inbuf, stdin);
361 fprintf(newmsg, "From %s %sSubject: %s\n",
362 ptr, ctime(&t), inbuf);
363 blankline = seensubj = YES;
366 blankline = seensubj = NO;
368 fgets(inbuf, sizeof inbuf, stdin);
369 if (feof(stdin) || ferror(stdin))
371 blankline = (blankline || (inbuf[0] == '\n'));
372 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
373 fputs(inbuf, newmsg);
377 printf("NOTICE: Messages should have a Subject field!\n");
390 * prepare to display messages
392 totty = (isatty(fileno(stdout)) != 0);
393 use_pager = use_pager && totty;
395 snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), MSGSRC);
396 msgsrc = fopen(fname, "r");
399 fscanf(msgsrc, "%d\n", &nextmsg);
401 if (nextmsg > lastmsg+1) {
402 printf("Warning: bounds have been reset (%d, %d)\n",
404 truncate(fname, (off_t)0);
408 rcfirst = nextmsg - rcback;
412 msgsrc = fopen(fname, "r+");
414 msgsrc = fopen(fname, "w");
416 err(errno, "%s", fname);
418 if (rcfirst > lastmsg+1) {
419 printf("Warning: the last message is number %d.\n",
423 if (rcfirst > firstmsg)
424 firstmsg = rcfirst; /* don't set below first msg */
428 fseek(msgsrc, 0L, 0);
429 fprintf(msgsrc, "%d\n", nextmsg);
436 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
439 if (tgetent(inbuf, getenv("TERM")) <= 0
440 || (Lpp = tgetnum("li")) <= 0) {
446 Lpp -= 6; /* for headers, etc. */
452 signal(SIGINT, onintr);
457 for (msg = firstmsg; msg <= lastmsg; msg++) {
459 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg);
460 newmsg = fopen(fname, "r");
464 gfrsub(newmsg); /* get From and Subject fields */
465 if (locomode && !local) {
470 if (qopt) { /* This has to be located here */
471 printf("There are new messages.\n");
475 if (already && !hdrs)
482 signal(SIGTSTP, onsusp);
483 (void) setjmp(tstpbuf);
487 printf("Message %d:\nFrom %s %s", msg, from, date);
491 printf("Subject: %s", subj);
500 && fgets(inbuf, sizeof inbuf, newmsg)
501 && inbuf[0] != '\n') {
502 fputs(inbuf, stdout);
507 lct = linecnt(newmsg);
509 printf("(%d%sline%s) ", lct, seensubj? " " : " more ",
510 (lct == 1) ? "" : "s");
519 * Ask user for command
522 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
526 signal(SIGTSTP, SIG_DFL);
537 printf("--Postponed--\n");
539 /* intentional fall-thru */
542 if (msg >= nextmsg) sep = "Flushed";
548 use_pager = (*in++ == 'p');
549 /* intentional fallthru */
564 prmesg(nlines + lct + (seensubj? 1 : 0));
569 printf("--%s--\n", sep);
571 if (msg >= nextmsg) {
573 fseek(msgsrc, 0L, 0);
574 fprintf(msgsrc, "%d\n", nextmsg);
584 * Make sure .rc file gets updated
586 if (--msg >= nextmsg) {
588 fseek(msgsrc, 0L, 0);
589 fprintf(msgsrc, "%d\n", nextmsg);
592 if (already && !quitit && lastcmd && totty) {
594 * save or reply to last message?
598 if (inbuf[0] == '-' || isdigit(inbuf[0]))
601 if (!(already || hush || qopt))
602 printf("No new messages.\n");
609 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n");
619 if (use_pager && length > Lpp) {
620 signal(SIGPIPE, SIG_IGN);
621 signal(SIGQUIT, SIG_IGN);
622 if ((env_pager = getenv("PAGER")) == NULL) {
623 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp);
625 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager);
627 outf = popen(cmdbuf, "w");
631 setbuf(outf, (char *)NULL);
639 while (fgets(inbuf, sizeof inbuf, newmsg)) {
647 if (outf != stdout) {
649 signal(SIGPIPE, SIG_DFL);
650 signal(SIGQUIT, SIG_DFL);
656 /* force wait on output */
657 tcdrain(fileno(stdout));
661 onintr(int unused __unused)
663 signal(SIGINT, onintr);
677 fseek(newmsg, 0L, 2);
683 * We have just gotten a susp. Suspend and prepare to resume.
686 onsusp(int unused __unused)
688 signal(SIGTSTP, SIG_DFL);
691 signal(SIGTSTP, onsusp);
699 off_t oldpos = ftell(f);
703 while (fgets(lbuf, sizeof lbuf, f))
714 sscanf(buf, "%d", &i);
715 sprintf(buf, "Goto %d", i);
720 ask(const char *prompt)
727 printf("%s ", prompt);
730 (void) fgets(inbuf, sizeof inbuf, stdin);
731 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
737 * Handle 'mail' and 'save' here.
739 if ((inch = inbuf[0]) == 's' || inch == 'm') {
742 else if (isdigit(inbuf[1]))
743 cmsg = atoi(&inbuf[1]);
746 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg);
748 oldpos = ftell(newmsg);
750 cpfrom = fopen(fname, "r");
752 printf("Message %d not found\n", cmsg);
760 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
766 strcpy(fname, "Messages");
767 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND);
770 strcpy(fname, _PATH_TMP);
773 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL,
778 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) {
783 fseek(newmsg, oldpos, 0);
788 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)))
789 fwrite(inbuf, 1, n, cpto);
793 fseek(newmsg, oldpos, 0); /* reposition current message */
795 printf("Message %d saved in \"%s\"\n", cmsg, fname);
811 seensubj = seenfrom = NO;
813 subj[0] = from[0] = date[0] = '\0';
816 * Is this a normal message?
818 if (fgets(inbuf, sizeof inbuf, infile)) {
819 if (strncmp(inbuf, "From", 4)==0) {
821 * expected form starts with From
824 frompos = ftell(infile);
828 count = sizeof(from) - 1;
829 while (*in && *in > ' ' && count-- > 0) {
830 if (*in == ':' || *in == '@' ||
837 if (*(in = nxtfld(in)))
838 strncpy(date, in, sizeof date);
846 * not the expected form
848 fseek(infile, 0L, 0);
859 * look for Subject line until EOF or a blank line
861 while (fgets(inbuf, sizeof inbuf, infile)
862 && !(blankline = (inbuf[0] == '\n'))) {
864 * extract Subject line
866 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
868 frompos = ftell(infile);
869 strncpy(subj, nxtfld(inbuf), sizeof subj);
876 fseek(infile, frompos, 0);
880 * for possible use with Mail
882 strncpy(subj, "(No Subject)\n", sizeof subj);
886 nxtfld(unsigned char *s)
888 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */
889 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */