8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
295 lines
7.2 KiB
C
295 lines
7.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1988, 1990, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)wall.c 8.2 (Berkeley) 11/16/93";
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#endif
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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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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <ctype.h>
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#include <err.h>
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#include <grp.h>
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#include <locale.h>
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#include <paths.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 <time.h>
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#include <unistd.h>
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#include <utmpx.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "ttymsg.h"
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static void makemsg(char *);
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static void usage(void);
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static struct wallgroup {
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struct wallgroup *next;
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char *name;
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gid_t gid;
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} *grouplist;
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static int nobanner;
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static int mbufsize;
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static char *mbuf;
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static int
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ttystat(char *line)
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{
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struct stat sb;
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char ttybuf[MAXPATHLEN];
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(void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line);
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if (stat(ttybuf, &sb) == 0) {
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return (0);
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} else
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return (-1);
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}
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int
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main(int argc, char *argv[])
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{
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struct iovec iov;
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struct utmpx *utmp;
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int ch;
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int ingroup;
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struct wallgroup *g;
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struct group *grp;
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char **np;
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const char *p;
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struct passwd *pw;
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(void)setlocale(LC_CTYPE, "");
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while ((ch = getopt(argc, argv, "g:n")) != -1)
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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 'g':
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g = (struct wallgroup *)malloc(sizeof *g);
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g->next = grouplist;
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g->name = optarg;
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g->gid = -1;
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grouplist = g;
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break;
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case '?':
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default:
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usage();
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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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usage();
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for (g = grouplist; g; g = g->next) {
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grp = getgrnam(g->name);
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if (grp != NULL)
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g->gid = grp->gr_gid;
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else
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warnx("%s: no such group", g->name);
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}
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makemsg(*argv);
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iov.iov_base = mbuf;
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iov.iov_len = mbufsize;
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/* NOSTRICT */
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while ((utmp = getutxent()) != NULL) {
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if (utmp->ut_type != USER_PROCESS)
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continue;
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if (ttystat(utmp->ut_line) != 0)
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continue;
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if (grouplist) {
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ingroup = 0;
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pw = getpwnam(utmp->ut_user);
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if (!pw)
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continue;
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for (g = grouplist; g && ingroup == 0; g = g->next) {
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if (g->gid == (gid_t)-1)
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continue;
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if (g->gid == pw->pw_gid)
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ingroup = 1;
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else if ((grp = getgrgid(g->gid)) != NULL) {
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for (np = grp->gr_mem; *np; np++) {
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if (strcmp(*np, utmp->ut_user) == 0) {
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ingroup = 1;
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break;
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}
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}
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}
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}
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if (ingroup == 0)
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continue;
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}
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if ((p = ttymsg(&iov, 1, utmp->ut_line, 60*5)) != NULL)
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warnx("%s", p);
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}
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exit(0);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: wall [-g group] [file]\n");
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exit(1);
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}
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void
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makemsg(char *fname)
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{
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int cnt;
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wchar_t ch;
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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;
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FILE *fp;
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int fd;
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char hostname[MAXHOSTNAMELEN], tmpname[64];
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wchar_t *p, *tmp, lbuf[256], codebuf[13];
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const char *tty;
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const char *whom;
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gid_t egid;
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(void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
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if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
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err(1, "can't open temporary file");
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(void)unlink(tmpname);
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if (!nobanner) {
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tty = ttyname(STDERR_FILENO);
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if (tty == NULL)
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tty = "no tty";
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if (!(whom = getlogin()))
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whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
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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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(void)fwprintf(fp, L"\r%79s\r\n", " ");
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(void)swprintf(lbuf, sizeof(lbuf)/sizeof(wchar_t),
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L"Broadcast Message from %s@%s",
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whom, hostname);
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(void)fwprintf(fp, L"%-79.79S\007\007\r\n", lbuf);
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(void)swprintf(lbuf, sizeof(lbuf)/sizeof(wchar_t),
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L" (%s) at %d:%02d %s...", tty,
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lt->tm_hour, lt->tm_min, lt->tm_zone);
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(void)fwprintf(fp, L"%-79.79S\r\n", lbuf);
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}
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(void)fwprintf(fp, L"%79s\r\n", " ");
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if (fname) {
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egid = getegid();
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setegid(getgid());
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if (freopen(fname, "r", stdin) == NULL)
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err(1, "can't read %s", fname);
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if (setegid(egid) != 0)
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err(1, "setegid failed");
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}
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cnt = 0;
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while (fgetws(lbuf, sizeof(lbuf)/sizeof(wchar_t), stdin)) {
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for (p = lbuf; (ch = *p) != L'\0'; ++p, ++cnt) {
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if (ch == L'\r') {
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putwc(L'\r', fp);
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cnt = 0;
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continue;
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} else if (ch == L'\n') {
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for (; cnt < 79; ++cnt)
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putwc(L' ', fp);
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putwc(L'\r', fp);
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putwc(L'\n', fp);
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break;
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}
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if (cnt == 79) {
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putwc(L'\r', fp);
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putwc(L'\n', fp);
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cnt = 0;
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}
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if (iswprint(ch) || iswspace(ch) || ch == L'\a' || ch == L'\b') {
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putwc(ch, fp);
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} else {
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(void)swprintf(codebuf, sizeof(codebuf)/sizeof(wchar_t), L"<0x%X>", ch);
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for (tmp = codebuf; *tmp != L'\0'; ++tmp) {
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putwc(*tmp, fp);
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if (++cnt == 79) {
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putwc(L'\r', fp);
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putwc(L'\n', fp);
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cnt = 0;
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}
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}
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--cnt;
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}
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}
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}
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(void)fwprintf(fp, L"%79s\r\n", " ");
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rewind(fp);
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if (fstat(fd, &sbuf))
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err(1, "can't stat temporary file");
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mbufsize = sbuf.st_size;
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if (!(mbuf = malloc((u_int)mbufsize)))
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err(1, "out of memory");
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if ((int)fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
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err(1, "can't read temporary file");
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(void)close(fd);
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}
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