Adding upstream version 2.39.3.upstream/2.39.3

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

1 files changed, 185 insertions, 0 deletions

diff --git a/term-utils/mesg.c b/term-utils/mesg.c
new file mode 100644
index 0000000..cb0b493
--- /dev/null
+++ b/term-utils/mesg.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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 Fri Mar 10 20:27:19 1995, faith@cs.unc.edu, for Linux
+ * Modified Mon Jul  1 18:14:10 1996, janl@ifi.uio.no, writing to stdout
+ *	as suggested by Michael Meskes <meskes@Informatik.RWTH-Aachen.DE>
+ *
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ *
+ * 2010-12-01 Marek Polacek <mmpolacek@gmail.com>
+ * - cleanups
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <getopt.h>
+
+#include "closestream.h"
+#include "nls.h"
+#include "c.h"
+#include "rpmatch.h"
+#include "ttyutils.h"
+#include "pathnames.h"
+
+/* exit codes */
+
+#define IS_ALLOWED        0  /* Receiving messages is allowed.  */
+#define IS_NOT_ALLOWED    1  /* Receiving messages is not allowed.  */
+#define MESG_EXIT_FAILURE 2  /* An error occurred.  */
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	/* TRANSLATORS: this program uses for y and n rpmatch(3),
+	 * which means they can be translated.  */
+	fprintf(out,
+	      _(" %s [options] [y | n]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Control write access of other users to your terminal.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -v, --verbose  explain what is being done\n"), out);
+	printf(USAGE_HELP_OPTIONS(16));
+	printf(USAGE_MAN_TAIL("mesg(1)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+	struct stat sb;
+	char *tty;
+	char ttybuf[sizeof(_PATH_PROC_FDDIR) + sizeof(stringify_value(INT_MAX))];
+	int ch, fd, verbose = FALSE, ret;
+
+	static const struct option longopts[] = {
+		{ "verbose",    no_argument,       NULL, 'v' },
+		{ "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, "vVh", longopts, NULL)) != -1)
+		switch (ch) {
+		case 'v':
+			verbose = TRUE;
+			break;
+
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	fd = get_terminal_stdfd();
+	if (fd < 0) {
+		if (verbose)
+			warnx(_("no tty"));
+		exit(MESG_EXIT_FAILURE);
+	}
+
+	tty = ttyname(fd);
+	if (!tty) {
+		snprintf(ttybuf, sizeof(ttybuf), "%s/%d", _PATH_PROC_FDDIR, fd);
+		tty = ttybuf;
+		if (verbose)
+			warnx(_("ttyname() failed, attempting to go around using: %s"), tty);
+	}
+
+	if (!*argv) {
+		if (stat(tty, &sb))
+			err(MESG_EXIT_FAILURE, _("stat of %s failed"), tty);
+		if (sb.st_mode & (S_IWGRP | S_IWOTH)) {
+			puts(_("is y"));
+			return IS_ALLOWED;
+		}
+		puts(_("is n"));
+		return IS_NOT_ALLOWED;
+	}
+
+	if ((fd = open(tty, O_RDONLY)) < 0)
+		err(MESG_EXIT_FAILURE, _("cannot open %s"), tty);
+	if (fstat(fd, &sb))
+		err(MESG_EXIT_FAILURE, _("stat of %s failed"), tty);
+
+	switch (rpmatch(argv[0])) {
+	case RPMATCH_YES:
+#ifdef USE_TTY_GROUP
+		if (fchmod(fd, sb.st_mode | S_IWGRP) < 0)
+#else
+		if (fchmod(fd, sb.st_mode | S_IWGRP | S_IWOTH) < 0)
+#endif
+			err(MESG_EXIT_FAILURE, _("change %s mode failed"), tty);
+		if (verbose)
+			puts(_("write access to your terminal is allowed"));
+		ret = IS_ALLOWED;
+		break;
+	case RPMATCH_NO:
+		if (fchmod(fd, sb.st_mode & ~(S_IWGRP|S_IWOTH)) < 0)
+			 err(MESG_EXIT_FAILURE, _("change %s mode failed"), tty);
+		if (verbose)
+			puts(_("write access to your terminal is denied"));
+		ret = IS_NOT_ALLOWED;
+		break;
+	case RPMATCH_INVALID:
+		warnx(_("invalid argument: %s"), argv[0]);
+		errtryhelp(EXIT_FAILURE);
+        default:
+                abort();
+	}
+	close(fd);
+	return ret;
+}