863 lines
17 KiB
C
863 lines
17 KiB
C
/*-
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)msgs.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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/*
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* msgs - a user bulletin board program
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*
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* usage:
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* msgs [fhlopq] [[-]number] to read messages
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* msgs -s to place messages
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* msgs -c [-days] to clean up the bulletin board
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*
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* prompt commands are:
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* y print message
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* n flush message, go to next message
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* q flush message, quit
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* p print message, turn on 'pipe thru more' mode
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* P print message, turn off 'pipe thru more' mode
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* - reprint last message
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* s[-][<num>] [<filename>] save message
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* m[-][<num>] mail with message in temp mbox
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* x exit without flushing this message
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* <num> print message number <num>
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*/
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#define V7 /* will look for TERM in the environment */
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#define OBJECT /* will object to messages without Subjects */
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/* #define REJECT /* will reject messages without Subjects
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(OBJECT must be defined also) */
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/* #define UNBUFFERED /* use unbuffered output */
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <errno.h>
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#include <pwd.h>
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#include <setjmp.h>
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#include <termios.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "pathnames.h"
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#define CMODE 0666 /* bounds file creation mode */
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#define NO 0
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#define YES 1
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#define SUPERUSER 0 /* superuser uid */
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#define DAEMON 1 /* daemon uid */
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#define NLINES 24 /* default number of lines/crt screen */
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#define NDAYS 21 /* default keep time for messages */
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#define DAYS *24*60*60 /* seconds/day */
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#define MSGSRC ".msgsrc" /* user's rc file */
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#define BOUNDS "bounds" /* message bounds file */
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#define NEXT "Next message? [yq]"
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#define MORE "More? [ynq]"
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#define NOMORE "(No more) [q] ?"
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typedef char bool;
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FILE *msgsrc;
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FILE *newmsg;
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char *sep = "-";
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char inbuf[BUFSIZ];
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char fname[128];
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char cmdbuf[128];
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char subj[128];
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char from[128];
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char date[128];
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char *ptr;
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char *in;
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bool local;
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bool ruptible;
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bool totty;
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bool seenfrom;
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bool seensubj;
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bool blankline;
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bool printing = NO;
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bool mailing = NO;
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bool quitit = NO;
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bool sending = NO;
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bool intrpflg = NO;
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int uid;
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int msg;
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int prevmsg;
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int lct;
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int nlines;
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int Lpp = 0;
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time_t t;
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time_t keep;
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char *mktemp();
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char *nxtfld();
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void onintr();
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void onsusp();
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/* option initialization */
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bool hdrs = NO;
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bool qopt = NO;
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bool hush = NO;
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bool send_msg = NO;
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bool locomode = NO;
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bool use_pager = NO;
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bool clean = NO;
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bool lastcmd = NO;
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jmp_buf tstpbuf;
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main(argc, argv)
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int argc; char *argv[];
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{
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bool newrc, already;
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int rcfirst = 0; /* first message to print (from .rc) */
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int rcback = 0; /* amount to back off of rcfirst */
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int firstmsg, nextmsg, lastmsg = 0;
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int blast = 0;
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FILE *bounds;
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#ifdef UNBUFFERED
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setbuf(stdout, NULL);
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#endif
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time(&t);
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setuid(uid = getuid());
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ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
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if (ruptible)
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signal(SIGINT, SIG_DFL);
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argc--, argv++;
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while (argc > 0) {
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if (isdigit(argv[0][0])) { /* starting message # */
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rcfirst = atoi(argv[0]);
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}
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else if (isdigit(argv[0][1])) { /* backward offset */
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rcback = atoi( &( argv[0][1] ) );
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}
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else {
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ptr = *argv;
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while (*ptr) switch (*ptr++) {
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case '-':
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break;
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case 'c':
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if (uid != SUPERUSER && uid != DAEMON) {
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fprintf(stderr, "Sorry\n");
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exit(1);
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}
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clean = YES;
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break;
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case 'f': /* silently */
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hush = YES;
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break;
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case 'h': /* headers only */
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hdrs = YES;
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break;
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case 'l': /* local msgs only */
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locomode = YES;
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break;
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case 'o': /* option to save last message */
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lastcmd = YES;
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break;
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case 'p': /* pipe thru 'more' during long msgs */
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use_pager = YES;
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break;
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case 'q': /* query only */
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qopt = YES;
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break;
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case 's': /* sending TO msgs */
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send_msg = YES;
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break;
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default:
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fprintf(stderr,
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"usage: msgs [fhlopq] [[-]number]\n");
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exit(1);
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}
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}
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argc--, argv++;
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}
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/*
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* determine current message bounds
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*/
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sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS);
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bounds = fopen(fname, "r");
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if (bounds != NULL) {
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fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
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fclose(bounds);
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blast = lastmsg; /* save upper bound */
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}
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if (clean)
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keep = t - (rcback? rcback : NDAYS) DAYS;
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if (clean || bounds == NULL) { /* relocate message bounds */
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struct direct *dp;
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struct stat stbuf;
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bool seenany = NO;
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DIR *dirp;
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dirp = opendir(_PATH_MSGS);
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if (dirp == NULL) {
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perror(_PATH_MSGS);
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exit(errno);
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}
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firstmsg = 32767;
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lastmsg = 0;
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for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
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register char *cp = dp->d_name;
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register int i = 0;
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if (dp->d_ino == 0)
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continue;
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if (dp->d_namlen == 0)
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continue;
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if (clean)
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sprintf(inbuf, "%s/%s", _PATH_MSGS, cp);
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while (isdigit(*cp))
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i = i * 10 + *cp++ - '0';
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if (*cp)
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continue; /* not a message! */
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if (clean) {
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if (stat(inbuf, &stbuf) != 0)
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continue;
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if (stbuf.st_mtime < keep
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&& stbuf.st_mode&S_IWRITE) {
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unlink(inbuf);
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continue;
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}
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}
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if (i > lastmsg)
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lastmsg = i;
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if (i < firstmsg)
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firstmsg = i;
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seenany = YES;
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}
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closedir(dirp);
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if (!seenany) {
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if (blast != 0) /* never lower the upper bound! */
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lastmsg = blast;
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firstmsg = lastmsg + 1;
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}
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else if (blast > lastmsg)
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lastmsg = blast;
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if (!send_msg) {
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bounds = fopen(fname, "w");
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if (bounds == NULL) {
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perror(fname);
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exit(errno);
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}
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chmod(fname, CMODE);
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fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
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fclose(bounds);
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}
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}
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if (send_msg) {
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/*
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* Send mode - place msgs in _PATH_MSGS
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*/
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bounds = fopen(fname, "w");
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if (bounds == NULL) {
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perror(fname);
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exit(errno);
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}
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nextmsg = lastmsg + 1;
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sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg);
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newmsg = fopen(fname, "w");
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if (newmsg == NULL) {
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perror(fname);
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exit(errno);
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}
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chmod(fname, 0644);
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fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
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fclose(bounds);
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sending = YES;
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if (ruptible)
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signal(SIGINT, onintr);
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if (isatty(fileno(stdin))) {
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ptr = getpwuid(uid)->pw_name;
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printf("Message %d:\nFrom %s %sSubject: ",
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nextmsg, ptr, ctime(&t));
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fflush(stdout);
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fgets(inbuf, sizeof inbuf, stdin);
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putchar('\n');
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fflush(stdout);
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fprintf(newmsg, "From %s %sSubject: %s\n",
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ptr, ctime(&t), inbuf);
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blankline = seensubj = YES;
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}
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else
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blankline = seensubj = NO;
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for (;;) {
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fgets(inbuf, sizeof inbuf, stdin);
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if (feof(stdin) || ferror(stdin))
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break;
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blankline = (blankline || (inbuf[0] == '\n'));
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seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
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fputs(inbuf, newmsg);
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}
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#ifdef OBJECT
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if (!seensubj) {
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printf("NOTICE: Messages should have a Subject field!\n");
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#ifdef REJECT
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unlink(fname);
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#endif
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exit(1);
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}
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#endif
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exit(ferror(stdin));
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}
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if (clean)
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exit(0);
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/*
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* prepare to display messages
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*/
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totty = (isatty(fileno(stdout)) != 0);
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use_pager = use_pager && totty;
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sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC);
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msgsrc = fopen(fname, "r");
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if (msgsrc) {
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newrc = NO;
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fscanf(msgsrc, "%d\n", &nextmsg);
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fclose(msgsrc);
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if (nextmsg > lastmsg+1) {
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printf("Warning: bounds have been reset (%d, %d)\n",
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firstmsg, lastmsg);
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truncate(fname, (off_t)0);
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newrc = YES;
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}
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else if (!rcfirst)
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rcfirst = nextmsg - rcback;
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}
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else
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newrc = YES;
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msgsrc = fopen(fname, "r+");
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if (msgsrc == NULL)
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msgsrc = fopen(fname, "w");
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if (msgsrc == NULL) {
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perror(fname);
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exit(errno);
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}
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if (rcfirst) {
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if (rcfirst > lastmsg+1) {
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printf("Warning: the last message is number %d.\n",
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lastmsg);
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rcfirst = nextmsg;
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}
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if (rcfirst > firstmsg)
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firstmsg = rcfirst; /* don't set below first msg */
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}
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if (newrc) {
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nextmsg = firstmsg;
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fseek(msgsrc, 0L, 0);
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fprintf(msgsrc, "%d\n", nextmsg);
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fflush(msgsrc);
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}
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#ifdef V7
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if (totty) {
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struct winsize win;
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if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
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Lpp = win.ws_row;
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if (Lpp <= 0) {
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if (tgetent(inbuf, getenv("TERM")) <= 0
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|| (Lpp = tgetnum("li")) <= 0) {
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Lpp = NLINES;
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}
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}
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}
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#endif
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Lpp -= 6; /* for headers, etc. */
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already = NO;
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prevmsg = firstmsg;
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printing = YES;
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if (ruptible)
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signal(SIGINT, onintr);
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/*
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* Main program loop
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*/
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for (msg = firstmsg; msg <= lastmsg; msg++) {
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sprintf(fname, "%s/%d", _PATH_MSGS, msg);
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newmsg = fopen(fname, "r");
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if (newmsg == NULL)
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continue;
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gfrsub(newmsg); /* get From and Subject fields */
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if (locomode && !local) {
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fclose(newmsg);
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continue;
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}
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if (qopt) { /* This has to be located here */
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printf("There are new messages.\n");
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exit(0);
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}
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if (already && !hdrs)
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putchar('\n');
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/*
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* Print header
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*/
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if (totty)
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signal(SIGTSTP, onsusp);
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(void) setjmp(tstpbuf);
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already = YES;
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nlines = 2;
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if (seenfrom) {
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printf("Message %d:\nFrom %s %s", msg, from, date);
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nlines++;
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}
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if (seensubj) {
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printf("Subject: %s", subj);
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nlines++;
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}
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else {
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if (seenfrom) {
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putchar('\n');
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nlines++;
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}
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while (nlines < 6
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&& fgets(inbuf, sizeof inbuf, newmsg)
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&& inbuf[0] != '\n') {
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fputs(inbuf, stdout);
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nlines++;
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}
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}
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lct = linecnt(newmsg);
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if (lct)
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printf("(%d%slines) ", lct, seensubj? " " : " more ");
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if (hdrs) {
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printf("\n-----\n");
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fclose(newmsg);
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continue;
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}
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/*
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* Ask user for command
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*/
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if (totty)
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ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
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else
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inbuf[0] = 'y';
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if (totty)
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signal(SIGTSTP, SIG_DFL);
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cmnd:
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in = inbuf;
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switch (*in) {
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case 'x':
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case 'X':
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exit(0);
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case 'q':
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case 'Q':
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quitit = YES;
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printf("--Postponed--\n");
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exit(0);
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/* intentional fall-thru */
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case 'n':
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case 'N':
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if (msg >= nextmsg) sep = "Flushed";
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prevmsg = msg;
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break;
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case 'p':
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case 'P':
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use_pager = (*in++ == 'p');
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/* intentional fallthru */
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case '\n':
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case 'y':
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default:
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if (*in == '-') {
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msg = prevmsg-1;
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sep = "replay";
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break;
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}
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if (isdigit(*in)) {
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msg = next(in);
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sep = in;
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break;
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}
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prmesg(nlines + lct + (seensubj? 1 : 0));
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prevmsg = msg;
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}
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printf("--%s--\n", sep);
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sep = "-";
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if (msg >= nextmsg) {
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nextmsg = msg + 1;
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fseek(msgsrc, 0L, 0);
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fprintf(msgsrc, "%d\n", nextmsg);
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fflush(msgsrc);
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}
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if (newmsg)
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fclose(newmsg);
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if (quitit)
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break;
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}
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|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/* force wait on output */
|
|
tcdrain(fileno(stdout));
|
|
}
|
|
|
|
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);
|
|
}
|