2006-12-06 17:25:32 -06:00
|
|
|
|
/*
|
2006-12-06 17:25:33 -06:00
|
|
|
|
* Copyright (c) 1988, 1990, 1993
|
|
|
|
|
* The Regents of the University of California. All rights reserved.
|
2006-12-06 17:25:32 -06:00
|
|
|
|
*
|
|
|
|
|
* 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.
|
|
|
|
|
*
|
2006-12-06 17:25:33 -06:00
|
|
|
|
* Modified Sun Mar 12 10:34:34 1995, faith@cs.unc.edu, for Linux
|
2006-12-06 17:25:32 -06:00
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This program is not related to David Wall, whose Stanford Ph.D. thesis
|
|
|
|
|
* is entitled "Mechanisms for Broadcast and Selective Broadcast".
|
2006-12-06 17:25:39 -06:00
|
|
|
|
*
|
2006-12-06 17:25:46 -06:00
|
|
|
|
* 1999-02-22 Arkadiusz Mi<EFBFBD>kiewicz <misiek@pld.ORG.PL>
|
2006-12-06 17:25:39 -06:00
|
|
|
|
* - added Native Language Support
|
|
|
|
|
*
|
2006-12-06 17:25:32 -06:00
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
|
#include <sys/stat.h>
|
|
|
|
|
#include <sys/time.h>
|
|
|
|
|
#include <sys/uio.h>
|
2006-12-06 17:25:33 -06:00
|
|
|
|
|
2010-12-10 09:20:00 -06:00
|
|
|
|
#include <errno.h>
|
2006-12-06 17:25:33 -06:00
|
|
|
|
#include <paths.h>
|
2006-12-06 17:25:39 -06:00
|
|
|
|
#include <ctype.h>
|
2006-12-06 17:25:32 -06:00
|
|
|
|
#include <pwd.h>
|
|
|
|
|
#include <stdio.h>
|
|
|
|
|
#include <stdlib.h>
|
2006-12-06 17:25:33 -06:00
|
|
|
|
#include <string.h>
|
2006-12-06 17:25:46 -06:00
|
|
|
|
#include <time.h>
|
2006-12-06 17:25:33 -06:00
|
|
|
|
#include <unistd.h>
|
|
|
|
|
#include <utmp.h>
|
2011-04-06 14:31:01 -05:00
|
|
|
|
#include <getopt.h>
|
2006-12-06 17:25:44 -06:00
|
|
|
|
|
2006-12-06 17:25:39 -06:00
|
|
|
|
#include "nls.h"
|
2010-11-29 06:27:04 -06:00
|
|
|
|
#include "xalloc.h"
|
2010-11-16 07:47:35 -06:00
|
|
|
|
#include "strutils.h"
|
2006-12-06 17:25:44 -06:00
|
|
|
|
#include "ttymsg.h"
|
2006-12-06 17:25:33 -06:00
|
|
|
|
#include "pathnames.h"
|
2006-12-06 17:25:44 -06:00
|
|
|
|
#include "carefulputc.h"
|
2011-01-25 15:44:52 -06:00
|
|
|
|
#include "c.h"
|
2006-12-06 17:25:33 -06:00
|
|
|
|
|
2006-12-06 17:25:32 -06:00
|
|
|
|
#define IGNOREUSER "sleeper"
|
2011-04-06 14:31:04 -05:00
|
|
|
|
#define WRITE_TIME_OUT 300 /* in seconds */
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2007-11-26 07:45:55 -06:00
|
|
|
|
#ifndef MAXHOSTNAMELEN
|
|
|
|
|
# ifdef HOST_NAME_MAX
|
|
|
|
|
# define MAXHOSTNAMELEN HOST_NAME_MAX
|
|
|
|
|
# else
|
|
|
|
|
# define MAXHOSTNAMELEN 64
|
|
|
|
|
# endif
|
|
|
|
|
#endif
|
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
/* Function prototypes */
|
|
|
|
|
char *makemsg(char *fname, size_t *mbufsize, int print_banner);
|
2011-04-06 14:31:01 -05:00
|
|
|
|
static void usage(FILE *out);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2011-04-06 14:31:01 -05:00
|
|
|
|
static void __attribute__((__noreturn__)) usage(FILE *out)
|
2011-01-06 06:08:43 -06:00
|
|
|
|
{
|
2011-04-06 14:31:01 -05:00
|
|
|
|
fprintf(out, _("Usage: %s [options] [file]\n"),
|
|
|
|
|
program_invocation_short_name);
|
|
|
|
|
fprintf(out, _(
|
|
|
|
|
"\nOptions:\n"
|
|
|
|
|
" -n, --nobanner do not print banner, works only for root\n"
|
2011-04-06 14:31:04 -05:00
|
|
|
|
" -t, --timeout TIMEOUT write timeout in seconds\n"
|
2011-04-06 14:31:01 -05:00
|
|
|
|
" -V, --version output version information and exit\n"
|
|
|
|
|
" -h, --help display this help and exit\n\n"));
|
|
|
|
|
|
|
|
|
|
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
|
2011-01-06 06:08:43 -06:00
|
|
|
|
}
|
|
|
|
|
|
2006-12-06 17:25:33 -06:00
|
|
|
|
int
|
2006-12-06 17:25:44 -06:00
|
|
|
|
main(int argc, char **argv) {
|
2006-12-06 17:25:32 -06:00
|
|
|
|
extern int optind;
|
|
|
|
|
int ch;
|
|
|
|
|
struct iovec iov;
|
2006-12-06 17:25:39 -06:00
|
|
|
|
struct utmp *utmpptr;
|
2006-12-06 17:25:44 -06:00
|
|
|
|
char *p;
|
2006-12-06 17:25:39 -06:00
|
|
|
|
char line[sizeof(utmpptr->ut_line) + 1];
|
2011-04-06 14:31:00 -05:00
|
|
|
|
int print_banner = TRUE;
|
|
|
|
|
char *mbuf;
|
|
|
|
|
size_t mbufsize;
|
2011-04-06 14:31:04 -05:00
|
|
|
|
long timeout = WRITE_TIME_OUT;
|
2006-12-06 17:25:39 -06:00
|
|
|
|
|
|
|
|
|
setlocale(LC_ALL, "");
|
2011-04-06 14:31:00 -05:00
|
|
|
|
bindtextdomain(PACKAGE, LOCALEDIR);
|
|
|
|
|
textdomain(PACKAGE);
|
2006-12-06 17:25:39 -06:00
|
|
|
|
|
2011-04-06 14:31:01 -05:00
|
|
|
|
static const struct option longopts[] = {
|
|
|
|
|
{ "nobanner", no_argument, 0, 'n' },
|
2011-04-06 14:31:04 -05:00
|
|
|
|
{ "timeout", required_argument, 0, 't' },
|
2011-04-06 14:31:01 -05:00
|
|
|
|
{ "version", no_argument, 0, 'V' },
|
|
|
|
|
{ "help", no_argument, 0, 'h' },
|
|
|
|
|
{ NULL, 0, 0, 0 }
|
|
|
|
|
};
|
|
|
|
|
|
2011-04-06 14:31:04 -05:00
|
|
|
|
while ((ch = getopt_long(argc, argv, "nt:Vh", longopts, NULL)) != -1) {
|
2006-12-06 17:25:32 -06:00
|
|
|
|
switch (ch) {
|
|
|
|
|
case 'n':
|
|
|
|
|
if (geteuid() == 0)
|
2011-04-06 14:31:00 -05:00
|
|
|
|
print_banner = FALSE;
|
2011-04-06 14:31:01 -05:00
|
|
|
|
else
|
|
|
|
|
warnx(_("--nobanner is available only for root"));
|
2006-12-06 17:25:32 -06:00
|
|
|
|
break;
|
2011-04-06 14:31:04 -05:00
|
|
|
|
case 't':
|
|
|
|
|
timeout = strtoll_or_err(optarg, _("invalid timeout argument"));
|
|
|
|
|
if (timeout < 1)
|
|
|
|
|
errx(EXIT_FAILURE, _("invalid timeout argument: %s"), optarg);
|
|
|
|
|
break;
|
2011-04-06 14:31:01 -05:00
|
|
|
|
case 'V':
|
|
|
|
|
printf(_("%s from %s\n"), program_invocation_short_name,
|
|
|
|
|
PACKAGE_STRING);
|
|
|
|
|
exit(EXIT_SUCCESS);
|
|
|
|
|
case 'h':
|
|
|
|
|
usage(stdout);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
default:
|
2011-04-06 14:31:01 -05:00
|
|
|
|
usage(stderr);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
2010-12-10 09:22:29 -06:00
|
|
|
|
}
|
2006-12-06 17:25:32 -06:00
|
|
|
|
argc -= optind;
|
|
|
|
|
argv += optind;
|
|
|
|
|
if (argc > 1)
|
2011-04-06 14:31:01 -05:00
|
|
|
|
usage(stderr);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
mbuf = makemsg(*argv, &mbufsize, print_banner);
|
2006-12-06 17:25:39 -06:00
|
|
|
|
|
2006-12-06 17:25:32 -06:00
|
|
|
|
iov.iov_base = mbuf;
|
|
|
|
|
iov.iov_len = mbufsize;
|
2006-12-06 17:25:39 -06:00
|
|
|
|
while((utmpptr = getutent())) {
|
|
|
|
|
if (!utmpptr->ut_name[0] ||
|
2006-12-06 17:25:46 -06:00
|
|
|
|
!strncmp(utmpptr->ut_name, IGNOREUSER,
|
|
|
|
|
sizeof(utmpptr->ut_name)))
|
2006-12-06 17:25:39 -06:00
|
|
|
|
continue;
|
|
|
|
|
#ifdef USER_PROCESS
|
|
|
|
|
if (utmpptr->ut_type != USER_PROCESS)
|
2006-12-06 17:25:32 -06:00
|
|
|
|
continue;
|
|
|
|
|
#endif
|
2006-12-06 17:25:49 -06:00
|
|
|
|
|
|
|
|
|
/* Joey Hess reports that use-sessreg in /etc/X11/wdm/
|
|
|
|
|
produces ut_line entries like :0, and a write
|
|
|
|
|
to /dev/:0 fails. */
|
|
|
|
|
if (utmpptr->ut_line[0] == ':')
|
|
|
|
|
continue;
|
|
|
|
|
|
2006-12-06 17:25:46 -06:00
|
|
|
|
xstrncpy(line, utmpptr->ut_line, sizeof(utmpptr->ut_line));
|
2011-04-06 14:31:04 -05:00
|
|
|
|
if ((p = ttymsg(&iov, 1, line, timeout)) != NULL)
|
2010-12-10 09:20:00 -06:00
|
|
|
|
warnx("%s", p);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
2006-12-06 17:25:39 -06:00
|
|
|
|
endutent();
|
2011-04-06 14:31:00 -05:00
|
|
|
|
free(mbuf);
|
2010-12-01 10:18:44 -06:00
|
|
|
|
exit(EXIT_SUCCESS);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
char *
|
|
|
|
|
makemsg(char *fname, size_t *mainmbufsize, int print_banner)
|
2006-12-06 17:25:32 -06:00
|
|
|
|
{
|
|
|
|
|
register int ch, cnt;
|
|
|
|
|
struct tm *lt;
|
|
|
|
|
struct passwd *pw;
|
|
|
|
|
struct stat sbuf;
|
2006-12-06 17:25:44 -06:00
|
|
|
|
time_t now;
|
2006-12-06 17:25:32 -06:00
|
|
|
|
FILE *fp;
|
|
|
|
|
int fd;
|
2011-04-06 14:31:00 -05:00
|
|
|
|
char *p, *whom, *where, *hostname, *lbuf, *tmpname, *tmpenv, *mbuf;
|
|
|
|
|
size_t mbufsize;
|
|
|
|
|
long line_max;
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
hostname = xmalloc(sysconf(_SC_HOST_NAME_MAX) + 1);
|
|
|
|
|
line_max = sysconf(_SC_LINE_MAX);
|
|
|
|
|
lbuf = xmalloc(line_max);
|
2010-12-01 10:18:44 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
tmpname = xmalloc(PATH_MAX);
|
|
|
|
|
tmpenv = getenv("TMPDIR");
|
|
|
|
|
if ((tmpenv))
|
|
|
|
|
snprintf(tmpname, PATH_MAX, "%s/%s.XXXXXX", tmpenv,
|
|
|
|
|
program_invocation_short_name);
|
|
|
|
|
else
|
|
|
|
|
snprintf(tmpname, PATH_MAX, "%s/%s.XXXXXX", _PATH_TMP,
|
|
|
|
|
program_invocation_short_name);
|
|
|
|
|
if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+")))
|
|
|
|
|
err(EXIT_FAILURE, _("can't open temporary file %s"), tmpname);
|
2010-12-10 09:22:29 -06:00
|
|
|
|
unlink(tmpname);
|
2011-04-06 14:31:00 -05:00
|
|
|
|
free(tmpname);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
if (print_banner == TRUE) {
|
2006-12-06 17:25:39 -06:00
|
|
|
|
if (!(whom = getlogin()) || !*whom)
|
2006-12-06 17:25:32 -06:00
|
|
|
|
whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
|
2011-04-06 14:31:00 -05:00
|
|
|
|
if (!whom) {
|
2006-12-06 17:25:35 -06:00
|
|
|
|
whom = "someone";
|
2011-04-06 14:31:00 -05:00
|
|
|
|
warn(_("cannot get passwd uid"));
|
|
|
|
|
}
|
|
|
|
|
where = ttyname(STDOUT_FILENO);
|
|
|
|
|
if (!where) {
|
2006-12-06 17:25:35 -06:00
|
|
|
|
where = "somewhere";
|
2011-04-06 14:31:00 -05:00
|
|
|
|
warn(_("cannot get tty name"));
|
|
|
|
|
}
|
2010-12-10 09:22:29 -06:00
|
|
|
|
gethostname(hostname, sizeof(hostname));
|
|
|
|
|
time(&now);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
lt = localtime(&now);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* all this stuff is to blank out a square for the message;
|
|
|
|
|
* we wrap message lines at column 79, not 80, because some
|
|
|
|
|
* terminals wrap after 79, some do not, and we can't tell.
|
|
|
|
|
* Which means that we may leave a non-blank character
|
|
|
|
|
* in column 80, but that can't be helped.
|
|
|
|
|
*/
|
2006-12-06 17:25:35 -06:00
|
|
|
|
/* snprintf is not always available, but the sprintf's here
|
|
|
|
|
will not overflow as long as %d takes at most 100 chars */
|
2010-12-10 09:22:29 -06:00
|
|
|
|
fprintf(fp, "\r%79s\r\n", " ");
|
|
|
|
|
sprintf(lbuf, _("Broadcast Message from %s@%s"),
|
2006-12-06 17:25:35 -06:00
|
|
|
|
whom, hostname);
|
2010-12-10 09:22:29 -06:00
|
|
|
|
fprintf(fp, "%-79.79s\007\007\r\n", lbuf);
|
|
|
|
|
sprintf(lbuf, " (%s) at %d:%02d ...",
|
2006-12-06 17:25:35 -06:00
|
|
|
|
where, lt->tm_hour, lt->tm_min);
|
2010-12-10 09:22:29 -06:00
|
|
|
|
fprintf(fp, "%-79.79s\r\n", lbuf);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
2010-12-10 09:22:29 -06:00
|
|
|
|
fprintf(fp, "%79s\r\n", " ");
|
2006-12-06 17:25:32 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
free(hostname);
|
|
|
|
|
|
2006-12-06 17:25:44 -06:00
|
|
|
|
if (fname) {
|
|
|
|
|
/*
|
|
|
|
|
* When we are not root, but suid or sgid, refuse to read files
|
|
|
|
|
* (e.g. device files) that the user may not have access to.
|
|
|
|
|
* After all, our invoker can easily do "wall < file"
|
|
|
|
|
* instead of "wall file".
|
|
|
|
|
*/
|
2011-04-06 14:31:00 -05:00
|
|
|
|
uid_t uid = getuid();
|
2010-12-01 10:18:44 -06:00
|
|
|
|
if (uid && (uid != geteuid() || getgid() != getegid()))
|
|
|
|
|
errx(EXIT_FAILURE, _("will not read %s - use stdin."),
|
|
|
|
|
fname);
|
|
|
|
|
|
|
|
|
|
if (!freopen(fname, "r", stdin))
|
2011-04-06 14:31:00 -05:00
|
|
|
|
err(EXIT_FAILURE, _("cannot open file %s"), fname);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
2006-12-06 17:25:44 -06:00
|
|
|
|
|
2011-04-06 14:31:00 -05:00
|
|
|
|
while (fgets(lbuf, line_max, stdin)) {
|
2006-12-06 17:25:33 -06:00
|
|
|
|
for (cnt = 0, p = lbuf; (ch = *p) != '\0'; ++p, ++cnt) {
|
2006-12-06 17:25:32 -06:00
|
|
|
|
if (cnt == 79 || ch == '\n') {
|
|
|
|
|
for (; cnt < 79; ++cnt)
|
|
|
|
|
putc(' ', fp);
|
|
|
|
|
putc('\r', fp);
|
|
|
|
|
putc('\n', fp);
|
|
|
|
|
cnt = 0;
|
2006-12-06 17:25:33 -06:00
|
|
|
|
}
|
2007-07-16 07:41:28 -05:00
|
|
|
|
if (ch != '\n')
|
|
|
|
|
carefulputc(ch, fp);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|
2006-12-06 17:25:44 -06:00
|
|
|
|
}
|
2006-12-06 17:25:48 -06:00
|
|
|
|
fprintf(fp, "%79s\r\n", " ");
|
2011-04-06 14:31:00 -05:00
|
|
|
|
|
|
|
|
|
free(lbuf);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
rewind(fp);
|
|
|
|
|
|
2010-12-01 10:18:44 -06:00
|
|
|
|
if (fstat(fd, &sbuf))
|
|
|
|
|
err(EXIT_FAILURE, _("fstat failed"));
|
|
|
|
|
|
2006-12-06 17:25:32 -06:00
|
|
|
|
mbufsize = sbuf.st_size;
|
2011-04-06 14:31:00 -05:00
|
|
|
|
memcpy(mainmbufsize, &mbufsize, sizeof(size_t));
|
2010-11-29 06:27:04 -06:00
|
|
|
|
mbuf = xmalloc(mbufsize);
|
|
|
|
|
|
2010-12-01 10:18:44 -06:00
|
|
|
|
if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
|
|
|
|
|
err(EXIT_FAILURE, _("fread failed"));
|
|
|
|
|
|
2010-12-10 09:22:29 -06:00
|
|
|
|
close(fd);
|
2011-04-06 14:31:00 -05:00
|
|
|
|
fclose(fp);
|
|
|
|
|
return(mbuf);
|
2006-12-06 17:25:32 -06:00
|
|
|
|
}
|