+++ /dev/null
-/*
- * Copyright (c) 1988, 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-
-
-#ifndef lint
-static const char copyright[] =
-"@(#) Copyright (c) 1988, 1990, 1993\n\
- The Regents of the University of California. All rights reserved.\n";
-#endif
-
-#ifndef lint
-static const char sccsid[] = "@(#)wall.c 8.2 (Berkeley) 11/16/93";
-#endif
-
-/*
- * This program is not related to David Wall, whose Stanford Ph.D. thesis
- * is entitled "Mechanisms for Broadcast and Selective Broadcast".
- */
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/uio.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <grp.h>
-#include <locale.h>
-#include <paths.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include <utmp.h>
-
-#include "ttymsg.h"
-
-static void makemsg(char *);
-static void usage(void);
-
-struct wallgroup {
- struct wallgroup *next;
- char *name;
- gid_t gid;
-} *grouplist;
-int nobanner;
-int mbufsize;
-char *mbuf;
-
-int
-main(int argc, char *argv[])
-{
- struct iovec iov;
- struct utmp utmp;
- int ch;
- int ingroup;
- FILE *fp;
- struct wallgroup *g;
- struct group *grp;
- char **np;
- const char *p;
- struct passwd *pw;
- char line[sizeof(utmp.ut_line) + 1];
- char username[sizeof(utmp.ut_name) + 1];
-
- (void)setlocale(LC_CTYPE, "");
-
- while ((ch = getopt(argc, argv, "g:n")) != -1)
- switch (ch) {
- case 'n':
- /* undoc option for shutdown: suppress banner */
- if (geteuid() == 0)
- nobanner = 1;
- break;
- case 'g':
- g = (struct wallgroup *)malloc(sizeof *g);
- g->next = grouplist;
- g->name = optarg;
- g->gid = -1;
- grouplist = g;
- break;
- case '?':
- default:
- usage();
- }
- argc -= optind;
- argv += optind;
- if (argc > 1)
- usage();
-
- for (g = grouplist; g; g = g->next) {
- grp = getgrnam(g->name);
- if (grp != NULL)
- g->gid = grp->gr_gid;
- else
- warnx("%s: no such group", g->name);
- }
-
- makemsg(*argv);
-
- if (!(fp = fopen(_PATH_UTMP, "r")))
- err(1, "cannot read %s", _PATH_UTMP);
- iov.iov_base = mbuf;
- iov.iov_len = mbufsize;
- /* NOSTRICT */
- while (fread((char *)&utmp, sizeof(utmp), 1, fp) == 1) {
- if (!utmp.ut_name[0])
- continue;
- if (grouplist) {
- ingroup = 0;
- strlcpy(username, utmp.ut_name, sizeof(utmp.ut_name));
- pw = getpwnam(username);
- if (!pw)
- continue;
- for (g = grouplist; g && ingroup == 0; g = g->next) {
- if (g->gid == (gid_t)-1)
- continue;
- if (g->gid == pw->pw_gid)
- ingroup = 1;
- else if ((grp = getgrgid(g->gid)) != NULL) {
- for (np = grp->gr_mem; *np; np++) {
- if (strcmp(*np, username) == 0) {
- ingroup = 1;
- break;
- }
- }
- }
- }
- if (ingroup == 0)
- continue;
- }
- strncpy(line, utmp.ut_line, sizeof(utmp.ut_line));
- line[sizeof(utmp.ut_line)] = '\0';
- if ((p = ttymsg(&iov, 1, line, 60*5)) != NULL)
- warnx("%s", p);
- }
- exit(0);
-}
-
-static void
-usage()
-{
- (void)fprintf(stderr, "usage: wall [-g group] [file]\n");
- exit(1);
-}
-
-void
-makemsg(char *fname)
-{
- int cnt;
- unsigned char ch;
- struct tm *lt;
- struct passwd *pw;
- struct stat sbuf;
- time_t now;
- FILE *fp;
- int fd;
- char *p, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
- const char *tty;
- const char *whom;
- gid_t egid;
-
- (void)snprintf(tmpname, sizeof(tmpname), "%s/wall.XXXXXX", _PATH_TMP);
- if ((fd = mkstemp(tmpname)) == -1 || !(fp = fdopen(fd, "r+")))
- err(1, "can't open temporary file");
- (void)unlink(tmpname);
-
- if (!nobanner) {
- tty = ttyname(STDERR_FILENO);
- if (tty == NULL)
- tty = "no tty";
-
- if (!(whom = getlogin()))
- whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
- (void)gethostname(hostname, sizeof(hostname));
- (void)time(&now);
- 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.
- */
- (void)fprintf(fp, "\r%79s\r\n", " ");
- (void)snprintf(lbuf, sizeof(lbuf),
- "Broadcast Message from %s@%s",
- whom, hostname);
- (void)fprintf(fp, "%-79.79s\007\007\r\n", lbuf);
- (void)snprintf(lbuf, sizeof(lbuf),
- " (%s) at %d:%02d %s...", tty,
- lt->tm_hour, lt->tm_min, lt->tm_zone);
- (void)fprintf(fp, "%-79.79s\r\n", lbuf);
- }
- (void)fprintf(fp, "%79s\r\n", " ");
-
- if (fname) {
- egid = getegid();
- setegid(getgid());
- if (freopen(fname, "r", stdin) == NULL)
- err(1, "can't read %s", fname);
- setegid(egid);
- }
- while (fgets(lbuf, sizeof(lbuf), stdin))
- for (cnt = 0, p = lbuf; (ch = *p) != '\0'; ++p, ++cnt) {
- if (ch == '\r') {
- cnt = 0;
- } else if (cnt == 79 || ch == '\n') {
- for (; cnt < 79; ++cnt)
- putc(' ', fp);
- putc('\r', fp);
- putc('\n', fp);
- cnt = 0;
- }
- if (((ch & 0x80) && ch < 0xA0) ||
- /* disable upper controls */
- (!isprint(ch) && !isspace(ch) &&
- ch != '\a' && ch != '\b')
- ) {
- if (ch & 0x80) {
- ch &= 0x7F;
- putc('M', fp);
- if (++cnt == 79) {
- putc('\r', fp);
- putc('\n', fp);
- cnt = 0;
- }
- putc('-', fp);
- if (++cnt == 79) {
- putc('\r', fp);
- putc('\n', fp);
- cnt = 0;
- }
- }
- if (iscntrl(ch)) {
- ch ^= 040;
- putc('^', fp);
- if (++cnt == 79) {
- putc('\r', fp);
- putc('\n', fp);
- cnt = 0;
- }
- }
- putc(ch, fp);
- } else {
- putc(ch, fp);
- }
- }
- (void)fprintf(fp, "%79s\r\n", " ");
- rewind(fp);
-
- if (fstat(fd, &sbuf))
- err(1, "can't stat temporary file");
- mbufsize = sbuf.st_size;
- if (!(mbuf = malloc((u_int)mbufsize)))
- err(1, "out of memory");
- if ((int)fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize)
- err(1, "can't read temporary file");
- (void)close(fd);
-}
projects / apple / network_cmds.git / blobdiff