227 lines
6.4 KiB
C
227 lines
6.4 KiB
C
/*
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* Copyright (c) 1988, 1990, 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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* Modified Sun Mar 12 10:34:34 1995, faith@cs.unc.edu, for Linux
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*/
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/*
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* This program is not related to David Wall, whose Stanford Ph.D. thesis
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* is entitled "Mechanisms for Broadcast and Selective Broadcast".
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*
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* 1999-02-22 Arkadiusz Mi<4D>kiewicz <misiek@misiek.eu.org>
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* - added Native Language Support
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*
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <paths.h>
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#include <ctype.h>
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#include <pwd.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 <unistd.h>
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#include <utmp.h>
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#include "nls.h"
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#include "pathnames.h"
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void makemsg __P((char *));
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#define IGNOREUSER "sleeper"
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int nobanner;
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int mbufsize;
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char *mbuf;
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char *progname = "wall";
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/* ARGSUSED */
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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extern int optind;
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int ch;
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struct iovec iov;
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struct utmp *utmpptr;
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char *p, *ttymsg();
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char line[sizeof(utmpptr->ut_line) + 1];
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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progname = argv[0];
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p = rindex(progname, '/');
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if (p)
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progname = p+1;
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while ((ch = getopt(argc, argv, "n")) != EOF)
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switch (ch) {
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case 'n':
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/* undoc option for shutdown: suppress banner */
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if (geteuid() == 0)
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nobanner = 1;
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break;
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case '?':
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default:
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usage:
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(void)fprintf(stderr, _("usage: %s [file]\n"), progname);
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exit(1);
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}
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argc -= optind;
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argv += optind;
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if (argc > 1)
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goto usage;
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makemsg(*argv);
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setutent();
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iov.iov_base = mbuf;
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iov.iov_len = mbufsize;
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while((utmpptr = getutent())) {
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if (!utmpptr->ut_name[0] ||
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!strncmp(utmpptr->ut_name, IGNOREUSER, sizeof(utmpptr->ut_name)))
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continue;
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#ifdef USER_PROCESS
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if (utmpptr->ut_type != USER_PROCESS)
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continue;
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#endif
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strncpy(line, utmpptr->ut_line, sizeof(utmpptr->ut_line));
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line[sizeof(utmpptr->ut_line)-1] = '\0';
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if ((p = ttymsg(&iov, 1, line, 60*5)) != NULL)
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(void)fprintf(stderr, "%s: %s\n", progname, p);
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}
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endutent();
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exit(0);
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}
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void
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makemsg(fname)
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char *fname;
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{
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register int ch, cnt;
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struct tm *lt;
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struct passwd *pw;
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struct stat sbuf;
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time_t now, time();
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FILE *fp;
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int fd;
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char *p, *whom, *where, hostname[MAXHOSTNAMELEN],
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lbuf[MAXHOSTNAMELEN + 320],
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tmpname[sizeof(_PATH_TMP) + 20];
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(void)sprintf(tmpname, "%s/wall.XXXXXX", _PATH_TMP);
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if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+"))) {
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(void)fprintf(stderr, _("%s: can't open temporary file.\n"), progname);
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exit(1);
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}
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(void)unlink(tmpname);
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if (!nobanner) {
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if (!(whom = getlogin()) || !*whom)
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whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
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if (!whom || strlen(whom) > 100)
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whom = "someone";
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where = ttyname(2);
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if (!where || strlen(where) > 100)
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where = "somewhere";
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(void)gethostname(hostname, sizeof(hostname));
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(void)time(&now);
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lt = localtime(&now);
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/*
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* all this stuff is to blank out a square for the message;
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* we wrap message lines at column 79, not 80, because some
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* terminals wrap after 79, some do not, and we can't tell.
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* Which means that we may leave a non-blank character
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* in column 80, but that can't be helped.
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*/
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/* snprintf is not always available, but the sprintf's here
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will not overflow as long as %d takes at most 100 chars */
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(void)fprintf(fp, "\r%79s\r\n", " ");
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(void)sprintf(lbuf, _("Broadcast Message from %s@%s"),
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whom, hostname);
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(void)fprintf(fp, "%-79.79s\007\007\r\n", lbuf);
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(void)sprintf(lbuf, " (%s) at %d:%02d ...",
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where, lt->tm_hour, lt->tm_min);
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(void)fprintf(fp, "%-79.79s\r\n", lbuf);
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}
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(void)fprintf(fp, "%79s\r\n", " ");
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if (fname && !(freopen(fname, "r", stdin))) {
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(void)fprintf(stderr, _("%s: can't read %s.\n"), progname, fname);
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exit(1);
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}
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while (fgets(lbuf, sizeof(lbuf), stdin))
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for (cnt = 0, p = lbuf; (ch = *p) != '\0'; ++p, ++cnt) {
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if (cnt == 79 || ch == '\n') {
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for (; cnt < 79; ++cnt)
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putc(' ', fp);
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putc('\r', fp);
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putc('\n', fp);
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cnt = 0;
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} else {
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/* Test for control chars added Fri Mar 10
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19:49:30 1995, faith@cs.unc.edu */
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if (!isprint(ch) && !isspace(ch) && ch != '\007') {
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putc('^', fp);
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putc(ch^0x40,fp); /* DEL to ?, others to alpha */
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} else
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putc(ch, fp);
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}
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}
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(void)fprintf(fp, "%79s\r\n", " ");
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rewind(fp);
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if (fstat(fd, &sbuf)) {
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(void)fprintf(stderr, _("%s: can't stat temporary file.\n"), progname);
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exit(1);
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}
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mbufsize = sbuf.st_size;
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if (!(mbuf = malloc((u_int)mbufsize))) {
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(void)fprintf(stderr, _("%s: Out of memory!\n"), progname);
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exit(1);
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}
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if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize) {
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(void)fprintf(stderr, _("%s: can't read temporary file.\n"), progname);
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exit(1);
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}
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(void)close(fd);
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}
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