Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 450 insertions, 0 deletions

diff --git a/term-utils/wall.c b/term-utils/wall.c
new file mode 100644
index 0000000..c601d3e
--- /dev/null
+++ b/term-utils/wall.c
@@ -0,0 +1,450 @@
+/*
+ * 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.
+ *
+ * Modified Sun Mar 12 10:34:34 1995, faith@cs.unc.edu, for Linux
+ */
+
+/*
+ * This program is not related to David Wall, whose Stanford Ph.D. thesis
+ * is entitled "Mechanisms for Broadcast and Selective Broadcast".
+ *
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+
+#include <errno.h>
+#include <paths.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <utmpx.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <grp.h>
+
+#include "nls.h"
+#include "xalloc.h"
+#include "strutils.h"
+#include "ttymsg.h"
+#include "pathnames.h"
+#include "carefulputc.h"
+#include "c.h"
+#include "cctype.h"
+#include "fileutils.h"
+#include "closestream.h"
+#include "timeutils.h"
+#include "pwdutils.h"
+
+#define	TERM_WIDTH	79
+#define	WRITE_TIME_OUT	300		/* in seconds */
+
+/* Function prototypes */
+static char *makemsg(char *fname, char **mvec, int mvecsz,
+		    size_t *mbufsize, int print_banner);
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out,
+	      _(" %s [options] [<file> | <message>]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Write a message to all users.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -g, --group <group>     only send message to group\n"), out);
+	fputs(_(" -n, --nobanner          do not print banner, works only for root\n"), out);
+	fputs(_(" -t, --timeout <timeout> write timeout in seconds\n"), out);
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(25));
+	printf(USAGE_MAN_TAIL("wall(1)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+struct group_workspace {
+	gid_t	requested_group;
+	int	ngroups;
+
+/* getgrouplist() on OSX takes int* not gid_t* */
+#ifdef __APPLE__
+	int	*groups;
+#else
+	gid_t	*groups;
+#endif
+};
+
+static gid_t get_group_gid(const char *group)
+{
+	struct group *gr;
+	gid_t gid;
+
+	if ((gr = getgrnam(group)))
+		return gr->gr_gid;
+
+	gid = strtou32_or_err(group, _("invalid group argument"));
+	if (!getgrgid(gid))
+		errx(EXIT_FAILURE, _("%s: unknown gid"), group);
+
+	return gid;
+}
+
+static struct group_workspace *init_group_workspace(const char *group)
+{
+	struct group_workspace *buf = xmalloc(sizeof(struct group_workspace));
+
+	buf->requested_group = get_group_gid(group);
+	buf->ngroups = sysconf(_SC_NGROUPS_MAX) + 1;  /* room for the primary gid */
+	buf->groups = xcalloc(sizeof(*buf->groups), buf->ngroups);
+
+	return buf;
+}
+
+static void free_group_workspace(struct group_workspace *buf)
+{
+	if (!buf)
+		return;
+
+	free(buf->groups);
+	free(buf);
+}
+
+static int is_gr_member(const char *login, const struct group_workspace *buf)
+{
+	struct passwd *pw;
+	int ngroups = buf->ngroups;
+	int rc;
+
+	pw = getpwnam(login);
+	if (!pw)
+		return 0;
+
+	if (buf->requested_group == pw->pw_gid)
+		return 1;
+
+	rc = getgrouplist(login, pw->pw_gid, buf->groups, &ngroups);
+	if (rc < 0) {
+		/* buffer too small, not sure how this can happen, since
+		   we used sysconf to get the size... */
+		errx(EXIT_FAILURE,
+			_("getgrouplist found more groups than sysconf allows"));
+	}
+
+	for (; ngroups >= 0; --ngroups) {
+		if (buf->requested_group == (gid_t) buf->groups[ngroups])
+			return 1;
+	}
+
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int ch;
+	struct iovec iov;
+	struct utmpx *utmpptr;
+	char *p;
+	char line[sizeof(utmpptr->ut_line) + 1];
+	int print_banner = TRUE;
+	struct group_workspace *group_buf = NULL;
+	char *mbuf, *fname = NULL;
+	size_t mbufsize;
+	unsigned timeout = WRITE_TIME_OUT;
+	char **mvec = NULL;
+	int mvecsz = 0;
+
+	static const struct option longopts[] = {
+		{ "nobanner",	no_argument,		NULL, 'n' },
+		{ "timeout",	required_argument,	NULL, 't' },
+		{ "group",	required_argument,	NULL, 'g' },
+		{ "version",	no_argument,		NULL, 'V' },
+		{ "help",	no_argument,		NULL, 'h' },
+		{ NULL,	0, NULL, 0 }
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	while ((ch = getopt_long(argc, argv, "nt:g:Vh", longopts, NULL)) != -1) {
+		switch (ch) {
+		case 'n':
+			if (geteuid() == 0)
+				print_banner = FALSE;
+			else
+				warnx(_("--nobanner is available only for root"));
+			break;
+		case 't':
+			timeout = strtou32_or_err(optarg, _("invalid timeout argument"));
+			if (timeout < 1)
+				errx(EXIT_FAILURE, _("invalid timeout argument: %s"), optarg);
+			break;
+		case 'g':
+			group_buf = init_group_workspace(optarg);
+			break;
+
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc == 1 && access(argv[0], F_OK) == 0)
+		fname = argv[0];
+	else if (argc >= 1) {
+		mvec = argv;
+		mvecsz = argc;
+	}
+
+	mbuf = makemsg(fname, mvec, mvecsz, &mbufsize, print_banner);
+
+	iov.iov_base = mbuf;
+	iov.iov_len = mbufsize;
+	while((utmpptr = getutxent())) {
+		if (!utmpptr->ut_user[0])
+			continue;
+#ifdef USER_PROCESS
+		if (utmpptr->ut_type != USER_PROCESS)
+			continue;
+#endif
+		/* Joey Hess reports that use-sessreg in /etc/X11/wdm/ produces
+		 * ut_line entries like :0, and a write to /dev/:0 fails.
+		 *
+		 * It also seems that some login manager may produce empty ut_line.
+		 */
+		if (!*utmpptr->ut_line || *utmpptr->ut_line == ':')
+			continue;
+
+		if (group_buf && !is_gr_member(utmpptr->ut_user, group_buf))
+			continue;
+
+		mem2strcpy(line, utmpptr->ut_line, sizeof(utmpptr->ut_line), sizeof(line));
+		if ((p = ttymsg(&iov, 1, line, timeout)) != NULL)
+			warnx("%s", p);
+	}
+	endutxent();
+	free(mbuf);
+	free_group_workspace(group_buf);
+	exit(EXIT_SUCCESS);
+}
+
+struct buffer {
+	size_t	sz;
+	size_t	used;
+	char	*data;
+};
+
+static void buf_enlarge(struct buffer *bs, size_t len)
+{
+	if (bs->sz == 0 || len > bs->sz - bs->used) {
+		bs->sz += len < 128 ? 128 : len;
+		bs->data = xrealloc(bs->data, bs->sz);
+	}
+}
+
+static void buf_puts(struct buffer *bs, const char *s)
+{
+	size_t len = strlen(s);
+
+	buf_enlarge(bs, len + 1);
+	memcpy(bs->data + bs->used, s, len + 1);
+	bs->used += len;
+}
+
+static void __attribute__((__format__ (__printf__, 2, 3)))
+	buf_printf(struct buffer *bs, const char *fmt, ...)
+{
+	int rc;
+	va_list ap;
+	size_t limit;
+
+	buf_enlarge(bs, 0);	/* default size */
+	limit = bs->sz - bs->used;
+
+	va_start(ap, fmt);
+	rc = vsnprintf(bs->data + bs->used, limit, fmt, ap);
+	va_end(ap);
+
+	if (rc >= 0 && (size_t) rc >= limit) {	/* not enough, enlarge */
+		buf_enlarge(bs, (size_t)rc + 1);
+		limit = bs->sz - bs->used;
+		va_start(ap, fmt);
+		rc = vsnprintf(bs->data  + bs->used, limit, fmt, ap);
+		va_end(ap);
+	}
+
+	if (rc > 0)
+		bs->used += rc;
+}
+
+static void buf_putc_careful(struct buffer *bs, int c)
+{
+	if (isprint(c) || c == '\a' || c == '\t' || c == '\r' || c == '\n') {
+		buf_enlarge(bs, 1);
+		bs->data[bs->used++] = c;
+	} else if (!c_isascii(c))
+		buf_printf(bs, "\\%3o", (unsigned char)c);
+	else {
+		char tmp[] = { '^', c ^ 0x40, '\0' };
+		buf_puts(bs, tmp);
+	}
+}
+
+static char *makemsg(char *fname, char **mvec, int mvecsz,
+		     size_t *mbufsize, int print_banner)
+{
+	struct buffer _bs = {.used = 0}, *bs = &_bs;
+	register int ch, cnt;
+	char *p, *lbuf;
+	long line_max;
+
+	line_max = sysconf(_SC_LINE_MAX);
+	if (line_max <= 0)
+		line_max = 512;
+
+	lbuf = xmalloc(line_max);
+
+	if (print_banner == TRUE) {
+		char *hostname = xgethostname();
+		char *whom, *where, date[CTIME_BUFSIZ];
+		time_t now;
+
+		whom = xgetlogin();
+		if (!whom) {
+			whom = "<someone>";
+			warn(_("cannot get passwd uid"));
+		}
+		where = ttyname(STDOUT_FILENO);
+		if (!where) {
+			where = "somewhere";
+		} else if (strncmp(where, "/dev/", 5) == 0)
+			where += 5;
+
+		time(&now);
+		ctime_r(&now, date);
+		date[strlen(date) - 1] = '\0';
+
+		/*
+		 * 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.
+		 */
+		/* snprintf is not always available, but the sprintf's here
+		   will not overflow as long as %d takes at most 100 chars */
+		buf_printf(bs, "\r%*s\r\n", TERM_WIDTH, " ");
+
+		snprintf(lbuf, line_max,
+				_("Broadcast message from %s@%s (%s) (%s):"),
+				whom, hostname, where, date);
+		buf_printf(bs, "%-*.*s\007\007\r\n", TERM_WIDTH, TERM_WIDTH, lbuf);
+		free(hostname);
+	}
+	buf_printf(bs, "%*s\r\n", TERM_WIDTH, " ");
+
+	 if (mvec) {
+		/*
+		 * Read message from argv[]
+		 */
+		int i;
+
+		for (i = 0; i < mvecsz; i++) {
+			buf_puts(bs, mvec[i]);
+			if (i < mvecsz - 1)
+				buf_puts(bs, " ");
+		}
+		buf_puts(bs, "\r\n");
+	} else {
+		/*
+		 * read message from <file>
+		 */
+		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".
+			 */
+			uid_t uid = getuid();
+			if (uid && (uid != geteuid() || getgid() != getegid()))
+				errx(EXIT_FAILURE, _("will not read %s - use stdin."),
+				     fname);
+
+			if (!freopen(fname, "r", stdin))
+				err(EXIT_FAILURE, _("cannot open %s"), fname);
+
+		}
+
+		/*
+		 * Read message from stdin.
+		 */
+		while (fgets(lbuf, line_max, stdin)) {
+			for (cnt = 0, p = lbuf; (ch = *p) != '\0'; ++p, ++cnt) {
+				if (cnt == TERM_WIDTH || ch == '\n') {
+					for (; cnt < TERM_WIDTH; ++cnt)
+						buf_puts(bs, " ");
+					buf_puts(bs, "\r\n");
+					cnt = 0;
+				}
+				if (ch == '\t')
+					cnt += (7 - (cnt % 8));
+				if (ch != '\n')
+					buf_putc_careful(bs, ch);
+			}
+		}
+	}
+	buf_printf(bs, "%*s\r\n", TERM_WIDTH, " ");
+
+	free(lbuf);
+
+	bs->data[bs->used] = '\0';	/* be paranoid */
+	*mbufsize = bs->used;
+	return bs->data;
+}