initial import of NetBSD tree

1 files changed, 277 insertions, 0 deletions

diff --git a/sbin/mount_portal/mount_portal.c b/sbin/mount_portal/mount_portal.c
new file mode 100644
index 00000000000..390f70d00b7
--- /dev/null
+++ b/sbin/mount_portal/mount_portal.c
@@ -0,0 +1,277 @@
+/*	$NetBSD: mount_portal.c,v 1.6 1995/06/08 12:38:07 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software donated to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1992, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)mount_portal.c	8.4 (Berkeley) 3/27/94";
+#else
+static char rcsid[] = "$NetBSD: mount_portal.c,v 1.6 1995/06/08 12:38:07 cgd Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/syslog.h>
+#include <sys/mount.h>
+
+#include <err.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "mntopts.h"
+#include "pathnames.h"
+#include "portald.h"
+
+struct mntopt mopts[] = {
+	MOPT_STDOPTS,
+	{ NULL }
+};
+
+static void usage __P((void));
+
+static sig_atomic_t readcf;	/* Set when SIGHUP received */
+
+static void
+sigchld(sig)
+	int sig;
+{
+	pid_t pid;
+
+	while ((pid = waitpid((pid_t) -1, (int *) 0, WNOHANG)) > 0)
+		;
+	if (pid < 0 && errno != ECHILD)
+		syslog(LOG_WARNING, "waitpid: %s", strerror(errno));
+}
+
+static void
+sighup(sig)
+	int sig;
+{
+
+	readcf = 1;
+}
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct portal_args args;
+	struct sockaddr_un un;
+	char *conf;
+	char *mountpt;
+	int mntflags = 0;
+	char tag[32];
+
+	qelem q;
+	int rc;
+	int so;
+	int error = 0;
+
+	/*
+	 * Crack command line args
+	 */
+	int ch;
+
+	while ((ch = getopt(argc, argv, "o:")) != EOF) {
+		switch (ch) {
+		case 'o':
+			getmntopts(optarg, mopts, &mntflags);
+			break;
+		default:
+			error = 1;
+			break;
+		}
+	}
+
+	if (optind != (argc - 2))
+		error = 1;
+
+	if (error)
+		usage();
+
+	/*
+	 * Get config file and mount point
+	 */
+	conf = argv[optind];
+	mountpt = argv[optind+1];
+
+	/*
+	 * Construct the listening socket
+	 */
+	un.sun_family = AF_UNIX;
+	if (sizeof(_PATH_TMPPORTAL) >= sizeof(un.sun_path)) {
+		fprintf(stderr, "mount_portal: portal socket name too long\n");
+		exit(1);
+	}
+	strcpy(un.sun_path, _PATH_TMPPORTAL);
+	mktemp(un.sun_path);
+	un.sun_len = strlen(un.sun_path);
+
+	so = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (so < 0) {
+		fprintf(stderr, "mount_portal: socket: %s\n", strerror(errno));
+		exit(1);
+	}
+	(void) unlink(un.sun_path);
+	if (bind(so, (struct sockaddr *) &un, sizeof(un)) < 0)
+		err(1, NULL);
+	(void) unlink(un.sun_path);
+
+	(void) listen(so, 5);
+
+	args.pa_socket = so;
+	sprintf(tag, "portal:%d", getpid());
+	args.pa_config = tag;
+
+	rc = mount(MOUNT_PORTAL, mountpt, mntflags, &args);
+	if (rc < 0)
+		err(1, NULL);
+
+	/*
+	 * Everything is ready to go - now is a good time to fork
+	 */
+	daemon(0, 0);
+
+	/*
+	 * Start logging (and change name)
+	 */
+	openlog("portald", LOG_CONS|LOG_PID, LOG_DAEMON);
+
+	q.q_forw = q.q_back = &q;
+	readcf = 1;
+
+	signal(SIGCHLD, sigchld);
+	signal(SIGHUP, sighup);
+
+	/*
+	 * Just loop waiting for new connections and activating them
+	 */
+	for (;;) {
+		struct sockaddr_un un2;
+		int len2 = sizeof(un2);
+		int so2;
+		pid_t pid;
+		fd_set fdset;
+		int rc;
+
+		/*
+		 * Check whether we need to re-read the configuration file
+		 */
+		if (readcf) {
+			readcf = 0;
+			conf_read(&q, conf);
+			continue;
+		}
+	
+		/*
+		 * Accept a new connection
+		 * Will get EINTR if a signal has arrived, so just
+		 * ignore that error code
+		 */
+		FD_ZERO(&fdset);
+		FD_SET(so, &fdset);
+		rc = select(so+1, &fdset, (fd_set *)0, (fd_set *)0,
+		    (struct timeval *)0);
+		if (rc < 0) {
+			if (errno == EINTR)
+				continue;
+			syslog(LOG_ERR, "select: %s", strerror(errno));
+			exit(1);
+		}
+		if (rc == 0)
+			break;
+		so2 = accept(so, (struct sockaddr *) &un2, &len2);
+		if (so2 < 0) {
+			/*
+			 * The unmount function does a shutdown on the socket
+			 * which will generated ECONNABORTED on the accept.
+			 */
+			if (errno == ECONNABORTED)
+				break;
+			if (errno != EINTR) {
+				syslog(LOG_ERR, "accept: %s", strerror(errno));
+				exit(1);
+			}
+			continue;
+		}
+
+		/*
+		 * Now fork a new child to deal with the connection
+		 */
+	eagain:;
+		switch (pid = fork()) {
+		case -1:
+			if (errno == EAGAIN) {
+				sleep(1);
+				goto eagain;
+			}
+			syslog(LOG_ERR, "fork: %s", strerror(errno));
+			break;
+		case 0:
+			(void) close(so);
+			activate(&q, so2);
+			exit(0);
+		default:
+			(void) close(so2);
+			break;
+		}
+	}
+	syslog(LOG_INFO, "%s unmounted", mountpt);
+	exit(0);
+}
+
+static void
+usage()
+{
+	(void)fprintf(stderr,
+		"usage: mount_portal [-o options] config mount-point\n");
+	exit(1);
+}