2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software donated to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 "@(#) Copyright (c) 1992, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)mount_portal.c 8.6 (Berkeley) 4/26/95";
47 static const char rcsid[] =
51 #include <sys/param.h>
53 #include <sys/socket.h>
56 #include <sys/syslog.h>
57 #include <sys/mount.h>
68 #include "pathnames.h"
71 struct mntopt mopts[] = {
76 static void usage __P((void)) __dead2;
78 static sig_atomic_t readcf; /* Set when SIGHUP received */
80 static void sighup(sig)
86 static void sigchld(sig)
91 while ((pid = waitpid((pid_t) -1, (int *) 0, WNOHANG)) > 0)
93 /* wrtp - waitpid _doesn't_ return 0 when no children! */
95 if (pid < 0 && errno != ECHILD)
96 syslog(LOG_WARNING, "waitpid: %s", strerror(errno));
105 struct portal_args args;
106 struct sockaddr_un un;
108 char mountpt[MAXPATHLEN];
120 * Crack command line args
124 while ((ch = getopt(argc, argv, "o:")) != -1) {
127 getmntopts(optarg, mopts, &mntflags, 0);
135 if (optind != (argc - 2))
142 * Get config file and mount point
146 /* resolve the mountpoint with realpath(3) */
147 (void)checkpath(argv[optind+1], mountpt);
150 * Construct the listening socket
152 un.sun_family = AF_UNIX;
153 if (sizeof(_PATH_TMPPORTAL) >= sizeof(un.sun_path)) {
154 errx(EX_SOFTWARE, "portal socket name too long");
156 strcpy(un.sun_path, _PATH_TMPPORTAL);
158 un.sun_len = strlen(un.sun_path);
160 so = socket(AF_UNIX, SOCK_STREAM, 0);
162 err(EX_OSERR, "socket");
165 (void) unlink(un.sun_path);
166 if (bind(so, (struct sockaddr *) &un, sizeof(un)) < 0)
169 (void) unlink(un.sun_path);
172 (void) listen(so, 5);
175 sprintf(tag, "portal:%d", getpid());
176 args.pa_config = tag;
178 error = getvfsbyname("portalfs", &vfc);
179 if (error && vfsisloadable("portalfs")) {
180 if (vfsload("portalfs"))
181 err(EX_OSERR, "vfsload(portalfs)");
183 error = getvfsbyname("portalfs", &vfc);
186 errx(EX_OSERR, "portal filesystem is not available");
188 rc = mount(vfc.vfc_name, mountpt, mntflags, &args);
193 * Everything is ready to go - now is a good time to fork
200 * Start logging (and change name)
202 openlog("portald", LOG_CONS|LOG_PID, LOG_DAEMON);
204 q.q_forw = q.q_back = &q;
207 signal(SIGCHLD, sigchld);
208 signal(SIGHUP, sighup);
211 * Just loop waiting for new connections and activating them
214 struct sockaddr_un un2;
215 int len2 = sizeof(un2);
222 * Check whether we need to re-read the configuration file
226 printf ("re-reading configuration file\n");
234 * Accept a new connection
235 * Will get EINTR if a signal has arrived, so just
236 * ignore that error code
240 rc = select(so+1, &fdset, (fd_set *) 0, (fd_set *) 0, (struct timeval *) 0);
244 syslog(LOG_ERR, "select: %s", strerror(errno));
249 so2 = accept(so, (struct sockaddr *) &un2, &len2);
252 * The unmount function does a shutdown on the socket
253 * which will generated ECONNABORTED on the accept.
255 if (errno == ECONNABORTED)
257 if (errno != EINTR) {
258 syslog(LOG_ERR, "accept: %s", strerror(errno));
265 * Now fork a new child to deal with the connection
268 switch (pid = fork()) {
270 if (errno == EAGAIN) {
274 syslog(LOG_ERR, "fork: %s", strerror(errno));
285 syslog(LOG_INFO, "%s unmounted", mountpt);
292 (void)fprintf(stderr,
293 "usage: mount_portalfs [-o options] config mount-point\n");