+/*-
+ * Copyright (c) 1980 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)msgs.c 5.8 (Berkeley) 2/4/91";
+#endif /* not lint */
+
+/*
+ * msgs - a user bulletin board program
+ *
+ * usage:
+ * msgs [fhlopq] [[-]number] to read messages
+ * msgs -s to place messages
+ * msgs -c [-days] to clean up the bulletin board
+ *
+ * prompt commands are:
+ * y print message
+ * n flush message, go to next message
+ * q flush message, quit
+ * p print message, turn on 'pipe thru more' mode
+ * P print message, turn off 'pipe thru more' mode
+ * - reprint last message
+ * s[-][<num>] [<filename>] save message
+ * m[-][<num>] mail with message in temp mbox
+ * x exit without flushing this message
+ * <num> print message number <num>
+ */
+
+#define V7 /* will look for TERM in the environment */
+#define OBJECT /* will object to messages without Subjects */
+/* #define REJECT /* will reject messages without Subjects
+ (OBJECT must be defined also) */
+/* #define UNBUFFERED /* use unbuffered output */
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <errno.h>
+#include <pwd.h>
+#include <setjmp.h>
+#include <sgtty.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "pathnames.h"
+
+#define CMODE 0666 /* bounds file creation mode */
+#define NO 0
+#define YES 1
+#define SUPERUSER 0 /* superuser uid */
+#define DAEMON 1 /* daemon uid */
+#define NLINES 24 /* default number of lines/crt screen */
+#define NDAYS 21 /* default keep time for messages */
+#define DAYS *24*60*60 /* seconds/day */
+#define MSGSRC ".msgsrc" /* user's rc file */
+#define BOUNDS "bounds" /* message bounds file */
+#define NEXT "Next message? [yq]"
+#define MORE "More? [ynq]"
+#define NOMORE "(No more) [q] ?"
+
+typedef char bool;
+
+FILE *msgsrc;
+FILE *newmsg;
+char *sep = "-";
+char inbuf[BUFSIZ];
+char fname[128];
+char cmdbuf[128];
+char subj[128];
+char from[128];
+char date[128];
+char *ptr;
+char *in;
+bool local;
+bool ruptible;
+bool totty;
+bool seenfrom;
+bool seensubj;
+bool blankline;
+bool printing = NO;
+bool mailing = NO;
+bool quitit = NO;
+bool sending = NO;
+bool intrpflg = NO;
+int uid;
+int msg;
+int prevmsg;
+int lct;
+int nlines;
+int Lpp = 0;
+time_t t;
+time_t keep;
+struct sgttyb otty;
+
+char *mktemp();
+char *nxtfld();
+void onintr();
+void onsusp();
+
+/* option initialization */
+bool hdrs = NO;
+bool qopt = NO;
+bool hush = NO;
+bool send_msg = NO;
+bool locomode = NO;
+bool use_pager = NO;
+bool clean = NO;
+bool lastcmd = NO;
+jmp_buf tstpbuf;
+
+main(argc, argv)
+int argc; char *argv[];
+{
+ bool newrc, already;
+ int rcfirst = 0; /* first message to print (from .rc) */
+ int rcback = 0; /* amount to back off of rcfirst */
+ int firstmsg, nextmsg, lastmsg = 0;
+ int blast = 0;
+ FILE *bounds;
+
+#ifdef UNBUFFERED
+ setbuf(stdout, NULL);
+#endif
+
+ gtty(fileno(stdout), &otty);
+ time(&t);
+ setuid(uid = getuid());
+ ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
+ if (ruptible)
+ signal(SIGINT, SIG_DFL);
+
+ argc--, argv++;
+ while (argc > 0) {
+ if (isdigit(argv[0][0])) { /* starting message # */
+ rcfirst = atoi(argv[0]);
+ }
+ else if (isdigit(argv[0][1])) { /* backward offset */
+ rcback = atoi( &( argv[0][1] ) );
+ }
+ else {
+ ptr = *argv;
+ while (*ptr) switch (*ptr++) {
+
+ case '-':
+ break;
+
+ case 'c':
+ if (uid != SUPERUSER && uid != DAEMON) {
+ fprintf(stderr, "Sorry\n");
+ exit(1);
+ }
+ clean = YES;
+ break;
+
+ case 'f': /* silently */
+ hush = YES;
+ break;
+
+ case 'h': /* headers only */
+ hdrs = YES;
+ break;
+
+ case 'l': /* local msgs only */
+ locomode = YES;
+ break;
+
+ case 'o': /* option to save last message */
+ lastcmd = YES;
+ break;
+
+ case 'p': /* pipe thru 'more' during long msgs */
+ use_pager = YES;
+ break;
+
+ case 'q': /* query only */
+ qopt = YES;
+ break;
+
+ case 's': /* sending TO msgs */
+ send_msg = YES;
+ break;
+
+ default:
+ fprintf(stderr,
+ "usage: msgs [fhlopq] [[-]number]\n");
+ exit(1);
+ }
+ }
+ argc--, argv++;
+ }
+
+ /*
+ * determine current message bounds
+ */
+ sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS);
+ bounds = fopen(fname, "r");
+
+ if (bounds != NULL) {
+ fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
+ fclose(bounds);
+ blast = lastmsg; /* save upper bound */
+ }
+
+ if (clean)
+ keep = t - (rcback? rcback : NDAYS) DAYS;
+
+ if (clean || bounds == NULL) { /* relocate message bounds */
+ struct direct *dp;
+ struct stat stbuf;
+ bool seenany = NO;
+ DIR *dirp;
+
+ dirp = opendir(_PATH_MSGS);
+ if (dirp == NULL) {
+ perror(_PATH_MSGS);
+ exit(errno);
+ }
+
+ firstmsg = 32767;
+ lastmsg = 0;
+
+ for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
+ register char *cp = dp->d_name;
+ register int i = 0;
+
+ if (dp->d_ino == 0)
+ continue;
+ if (dp->d_namlen == 0)
+ continue;
+
+ if (clean)
+ sprintf(inbuf, "%s/%s", _PATH_MSGS, cp);
+
+ while (isdigit(*cp))
+ i = i * 10 + *cp++ - '0';
+ if (*cp)
+ continue; /* not a message! */
+
+ if (clean) {
+ if (stat(inbuf, &stbuf) != 0)
+ continue;
+ if (stbuf.st_mtime < keep
+ && stbuf.st_mode&S_IWRITE) {
+ unlink(inbuf);
+ continue;
+ }
+ }
+
+ if (i > lastmsg)
+ lastmsg = i;
+ if (i < firstmsg)
+ firstmsg = i;
+ seenany = YES;
+ }
+ closedir(dirp);
+
+ if (!seenany) {
+ if (blast != 0) /* never lower the upper bound! */
+ lastmsg = blast;
+ firstmsg = lastmsg + 1;
+ }
+ else if (blast > lastmsg)
+ lastmsg = blast;
+
+ if (!send_msg) {
+ bounds = fopen(fname, "w");
+ if (bounds == NULL) {
+ perror(fname);
+ exit(errno);
+ }
+ chmod(fname, CMODE);
+ fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
+ fclose(bounds);
+ }
+ }
+
+ if (send_msg) {
+ /*
+ * Send mode - place msgs in _PATH_MSGS
+ */
+ bounds = fopen(fname, "w");
+ if (bounds == NULL) {
+ perror(fname);
+ exit(errno);
+ }
+
+ nextmsg = lastmsg + 1;
+ sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg);
+ newmsg = fopen(fname, "w");
+ if (newmsg == NULL) {
+ perror(fname);
+ exit(errno);
+ }
+ chmod(fname, 0644);
+
+ fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
+ fclose(bounds);
+
+ sending = YES;
+ if (ruptible)
+ signal(SIGINT, onintr);
+
+ if (isatty(fileno(stdin))) {
+ ptr = getpwuid(uid)->pw_name;
+ printf("Message %d:\nFrom %s %sSubject: ",
+ nextmsg, ptr, ctime(&t));
+ fflush(stdout);
+ fgets(inbuf, sizeof inbuf, stdin);
+ putchar('\n');
+ fflush(stdout);
+ fprintf(newmsg, "From %s %sSubject: %s\n",
+ ptr, ctime(&t), inbuf);
+ blankline = seensubj = YES;
+ }
+ else
+ blankline = seensubj = NO;
+ for (;;) {
+ fgets(inbuf, sizeof inbuf, stdin);
+ if (feof(stdin) || ferror(stdin))
+ break;
+ blankline = (blankline || (inbuf[0] == '\n'));
+ seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
+ fputs(inbuf, newmsg);
+ }
+#ifdef OBJECT
+ if (!seensubj) {
+ printf("NOTICE: Messages should have a Subject field!\n");
+#ifdef REJECT
+ unlink(fname);
+#endif
+ exit(1);
+ }
+#endif
+ exit(ferror(stdin));
+ }
+ if (clean)
+ exit(0);
+
+ /*
+ * prepare to display messages
+ */
+ totty = (isatty(fileno(stdout)) != 0);
+ use_pager = use_pager && totty;
+
+ sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC);
+ msgsrc = fopen(fname, "r");
+ if (msgsrc) {
+ newrc = NO;
+ fscanf(msgsrc, "%d\n", &nextmsg);
+ fclose(msgsrc);
+ if (nextmsg > lastmsg+1) {
+ printf("Warning: bounds have been reset (%d, %d)\n",
+ firstmsg, lastmsg);
+ truncate(fname, (off_t)0);
+ newrc = YES;
+ }
+ else if (!rcfirst)
+ rcfirst = nextmsg - rcback;
+ }
+ else
+ newrc = YES;
+ msgsrc = fopen(fname, "a");
+ if (msgsrc == NULL) {
+ perror(fname);
+ exit(errno);
+ }
+ if (rcfirst) {
+ if (rcfirst > lastmsg+1) {
+ printf("Warning: the last message is number %d.\n",
+ lastmsg);
+ rcfirst = nextmsg;
+ }
+ if (rcfirst > firstmsg)
+ firstmsg = rcfirst; /* don't set below first msg */
+ }
+ if (newrc) {
+ nextmsg = firstmsg;
+ fseek(msgsrc, 0L, 0);
+ fprintf(msgsrc, "%d\n", nextmsg);
+ fflush(msgsrc);
+ }
+
+#ifdef V7
+ if (totty) {
+ struct winsize win;
+ if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
+ Lpp = win.ws_row;
+ if (Lpp <= 0) {
+ if (tgetent(inbuf, getenv("TERM")) <= 0
+ || (Lpp = tgetnum("li")) <= 0) {
+ Lpp = NLINES;
+ }
+ }
+ }
+#endif
+ Lpp -= 6; /* for headers, etc. */
+
+ already = NO;
+ prevmsg = firstmsg;
+ printing = YES;
+ if (ruptible)
+ signal(SIGINT, onintr);
+
+ /*
+ * Main program loop
+ */
+ for (msg = firstmsg; msg <= lastmsg; msg++) {
+
+ sprintf(fname, "%s/%d", _PATH_MSGS, msg);
+ newmsg = fopen(fname, "r");
+ if (newmsg == NULL)
+ continue;
+
+ gfrsub(newmsg); /* get From and Subject fields */
+ if (locomode && !local) {
+ fclose(newmsg);
+ continue;
+ }
+
+ if (qopt) { /* This has to be located here */
+ printf("There are new messages.\n");
+ exit(0);
+ }
+
+ if (already && !hdrs)
+ putchar('\n');
+
+ /*
+ * Print header
+ */
+ if (totty)
+ signal(SIGTSTP, onsusp);
+ (void) setjmp(tstpbuf);
+ already = YES;
+ nlines = 2;
+ if (seenfrom) {
+ printf("Message %d:\nFrom %s %s", msg, from, date);
+ nlines++;
+ }
+ if (seensubj) {
+ printf("Subject: %s", subj);
+ nlines++;
+ }
+ else {
+ if (seenfrom) {
+ putchar('\n');
+ nlines++;
+ }
+ while (nlines < 6
+ && fgets(inbuf, sizeof inbuf, newmsg)
+ && inbuf[0] != '\n') {
+ fputs(inbuf, stdout);
+ nlines++;
+ }
+ }
+
+ lct = linecnt(newmsg);
+ if (lct)
+ printf("(%d%slines) ", lct, seensubj? " " : " more ");
+
+ if (hdrs) {
+ printf("\n-----\n");
+ fclose(newmsg);
+ continue;
+ }
+
+ /*
+ * Ask user for command
+ */
+ if (totty)
+ ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
+ else
+ inbuf[0] = 'y';
+ if (totty)
+ signal(SIGTSTP, SIG_DFL);
+cmnd:
+ in = inbuf;
+ switch (*in) {
+ case 'x':
+ case 'X':
+ exit(0);
+
+ case 'q':
+ case 'Q':
+ quitit = YES;
+ printf("--Postponed--\n");
+ exit(0);
+ /* intentional fall-thru */
+ case 'n':
+ case 'N':
+ if (msg >= nextmsg) sep = "Flushed";
+ prevmsg = msg;
+ break;
+
+ case 'p':
+ case 'P':
+ use_pager = (*in++ == 'p');
+ /* intentional fallthru */
+ case '\n':
+ case 'y':
+ default:
+ if (*in == '-') {
+ msg = prevmsg-1;
+ sep = "replay";
+ break;
+ }
+ if (isdigit(*in)) {
+ msg = next(in);
+ sep = in;
+ break;
+ }
+
+ prmesg(nlines + lct + (seensubj? 1 : 0));
+ prevmsg = msg;
+
+ }
+
+ printf("--%s--\n", sep);
+ sep = "-";
+ if (msg >= nextmsg) {
+ nextmsg = msg + 1;
+ fseek(msgsrc, 0L, 0);
+ fprintf(msgsrc, "%d\n", nextmsg);
+ fflush(msgsrc);
+ }
+ if (newmsg)
+ fclose(newmsg);
+ if (quitit)
+ break;
+ }
+
+ /*
+ * Make sure .rc file gets updated
+ */
+ if (--msg >= nextmsg) {
+ nextmsg = msg + 1;
+ fseek(msgsrc, 0L, 0);
+ fprintf(msgsrc, "%d\n", nextmsg);
+ fflush(msgsrc);
+ }
+ if (already && !quitit && lastcmd && totty) {
+ /*
+ * save or reply to last message?
+ */
+ msg = prevmsg;
+ ask(NOMORE);
+ if (inbuf[0] == '-' || isdigit(inbuf[0]))
+ goto cmnd;
+ }
+ if (!(already || hush || qopt))
+ printf("No new messages.\n");
+ exit(0);
+}
+
+prmesg(length)
+int length;
+{
+ FILE *outf;
+
+ if (use_pager && length > Lpp) {
+ signal(SIGPIPE, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+ sprintf(cmdbuf, _PATH_PAGER, Lpp);
+ outf = popen(cmdbuf, "w");
+ if (!outf)
+ outf = stdout;
+ else
+ setbuf(outf, (char *)NULL);
+ }
+ else
+ outf = stdout;
+
+ if (seensubj)
+ putc('\n', outf);
+
+ while (fgets(inbuf, sizeof inbuf, newmsg)) {
+ fputs(inbuf, outf);
+ if (ferror(outf)) {
+ clearerr(outf);
+ break;
+ }
+ }
+
+ if (outf != stdout) {
+ pclose(outf);
+ signal(SIGPIPE, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ }
+ else {
+ fflush(stdout);
+ }
+
+ /* trick to force wait on output */
+ stty(fileno(stdout), &otty);
+}
+
+void
+onintr()
+{
+ signal(SIGINT, onintr);
+ if (mailing)
+ unlink(fname);
+ if (sending) {
+ unlink(fname);
+ puts("--Killed--");
+ exit(1);
+ }
+ if (printing) {
+ putchar('\n');
+ if (hdrs)
+ exit(0);
+ sep = "Interrupt";
+ if (newmsg)
+ fseek(newmsg, 0L, 2);
+ intrpflg = YES;
+ }
+}
+
+/*
+ * We have just gotten a susp. Suspend and prepare to resume.
+ */
+void
+onsusp()
+{
+
+ signal(SIGTSTP, SIG_DFL);
+ sigsetmask(0);
+ kill(0, SIGTSTP);
+ signal(SIGTSTP, onsusp);
+ if (!mailing)
+ longjmp(tstpbuf, 0);
+}
+
+linecnt(f)
+FILE *f;
+{
+ off_t oldpos = ftell(f);
+ int l = 0;
+ char lbuf[BUFSIZ];
+
+ while (fgets(lbuf, sizeof lbuf, f))
+ l++;
+ clearerr(f);
+ fseek(f, oldpos, 0);
+ return (l);
+}
+
+next(buf)
+char *buf;
+{
+ int i;
+ sscanf(buf, "%d", &i);
+ sprintf(buf, "Goto %d", i);
+ return(--i);
+}
+
+ask(prompt)
+char *prompt;
+{
+ char inch;
+ int n, cmsg;
+ off_t oldpos;
+ FILE *cpfrom, *cpto;
+
+ printf("%s ", prompt);
+ fflush(stdout);
+ intrpflg = NO;
+ (void) fgets(inbuf, sizeof inbuf, stdin);
+ if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
+ inbuf[n - 1] = '\0';
+ if (intrpflg)
+ inbuf[0] = 'x';
+
+ /*
+ * Handle 'mail' and 'save' here.
+ */
+ if ((inch = inbuf[0]) == 's' || inch == 'm') {
+ if (inbuf[1] == '-')
+ cmsg = prevmsg;
+ else if (isdigit(inbuf[1]))
+ cmsg = atoi(&inbuf[1]);
+ else
+ cmsg = msg;
+ sprintf(fname, "%s/%d", _PATH_MSGS, cmsg);
+
+ oldpos = ftell(newmsg);
+
+ cpfrom = fopen(fname, "r");
+ if (!cpfrom) {
+ printf("Message %d not found\n", cmsg);
+ ask (prompt);
+ return;
+ }
+
+ if (inch == 's') {
+ in = nxtfld(inbuf);
+ if (*in) {
+ for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
+ fname[n] = in[n];
+ }
+ fname[n] = NULL;
+ }
+ else
+ strcpy(fname, "Messages");
+ }
+ else {
+ strcpy(fname, _PATH_TMP);
+ mktemp(fname);
+ sprintf(cmdbuf, _PATH_MAIL, fname);
+ mailing = YES;
+ }
+ cpto = fopen(fname, "a");
+ if (!cpto) {
+ perror(fname);
+ mailing = NO;
+ fseek(newmsg, oldpos, 0);
+ ask(prompt);
+ return;
+ }
+
+ while (n = fread(inbuf, 1, sizeof inbuf, cpfrom))
+ fwrite(inbuf, 1, n, cpto);
+
+ fclose(cpfrom);
+ fclose(cpto);
+ fseek(newmsg, oldpos, 0); /* reposition current message */
+ if (inch == 's')
+ printf("Message %d saved in \"%s\"\n", cmsg, fname);
+ else {
+ system(cmdbuf);
+ unlink(fname);
+ mailing = NO;
+ }
+ ask(prompt);
+ }
+}
+
+gfrsub(infile)
+FILE *infile;
+{
+ off_t frompos;
+
+ seensubj = seenfrom = NO;
+ local = YES;
+ subj[0] = from[0] = date[0] = NULL;
+
+ /*
+ * Is this a normal message?
+ */
+ if (fgets(inbuf, sizeof inbuf, infile)) {
+ if (strncmp(inbuf, "From", 4)==0) {
+ /*
+ * expected form starts with From
+ */
+ seenfrom = YES;
+ frompos = ftell(infile);
+ ptr = from;
+ in = nxtfld(inbuf);
+ if (*in) while (*in && *in > ' ') {
+ if (*in == ':' || *in == '@' || *in == '!')
+ local = NO;
+ *ptr++ = *in++;
+ /* what about sizeof from ? */
+ }
+ *ptr = NULL;
+ if (*(in = nxtfld(in)))
+ strncpy(date, in, sizeof date);
+ else {
+ date[0] = '\n';
+ date[1] = NULL;
+ }
+ }
+ else {
+ /*
+ * not the expected form
+ */
+ fseek(infile, 0L, 0);
+ return;
+ }
+ }
+ else
+ /*
+ * empty file ?
+ */
+ return;
+
+ /*
+ * look for Subject line until EOF or a blank line
+ */
+ while (fgets(inbuf, sizeof inbuf, infile)
+ && !(blankline = (inbuf[0] == '\n'))) {
+ /*
+ * extract Subject line
+ */
+ if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
+ seensubj = YES;
+ frompos = ftell(infile);
+ strncpy(subj, nxtfld(inbuf), sizeof subj);
+ }
+ }
+ if (!blankline)
+ /*
+ * ran into EOF
+ */
+ fseek(infile, frompos, 0);
+
+ if (!seensubj)
+ /*
+ * for possible use with Mail
+ */
+ strncpy(subj, "(No Subject)\n", sizeof subj);
+}
+
+char *
+nxtfld(s)
+char *s;
+{
+ if (*s) while (*s && *s > ' ') s++; /* skip over this field */
+ if (*s) while (*s && *s <= ' ') s++; /* find start of next field */
+ return (s);
+}
projects / unix-history / commitdiff