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
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9 * modification, are permitted provided that the following conditions
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
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32 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
33 * @(#)mount_portal.c 8.6 (Berkeley) 4/26/95
34 * $FreeBSD: src/sbin/mount_portal/mount_portal.c,v 1.16 1999/10/09 11:54:11 phk Exp $
37 #include <sys/param.h>
39 #include <sys/socket.h>
42 #include <sys/syslog.h>
43 #include <sys/mount.h>
54 #include "pathnames.h"
57 struct mntopt mopts[] = {
62 static void usage(void) __dead2;
64 static sig_atomic_t readcf; /* Set when SIGHUP received */
67 sighup(int sig __unused)
73 sigchld(int sig __unused)
77 while ((pid = waitpid((pid_t) -1, NULL, WNOHANG)) > 0)
79 /* wrtp - waitpid _doesn't_ return 0 when no children! */
81 if (pid < 0 && errno != ECHILD)
82 syslog(LOG_WARNING, "waitpid: %s", strerror(errno));
87 main(int argc, char **argv)
89 struct portal_args args;
90 struct sockaddr_un un;
92 char mountpt[MAXPATHLEN];
104 * Crack command line args
108 while ((ch = getopt(argc, argv, "o:")) != -1) {
111 getmntopts(optarg, mopts, &mntflags, 0);
119 if (optind != (argc - 2))
126 * Get config file and mount point
130 /* resolve the mountpoint with realpath(3) */
131 checkpath(argv[optind+1], mountpt);
134 * Construct the listening socket
136 un.sun_family = AF_UNIX;
137 if (sizeof(_PATH_TMPPORTAL) >= sizeof(un.sun_path)) {
138 errx(EX_SOFTWARE, "portal socket name too long");
140 strcpy(un.sun_path, _PATH_TMPPORTAL);
142 un.sun_len = strlen(un.sun_path);
144 so = socket(AF_UNIX, SOCK_STREAM, 0);
146 err(EX_OSERR, "socket");
150 if (bind(so, (struct sockaddr *) &un, sizeof(un)) < 0)
159 sprintf(tag, "portal:%d", getpid());
160 args.pa_config = tag;
162 error = getvfsbyname("portal", &vfc);
163 if (error && vfsisloadable("portal")) {
164 if (vfsload("portal"))
165 err(EX_OSERR, "vfsload(portal)");
167 error = getvfsbyname("portal", &vfc);
170 errx(EX_OSERR, "portal filesystem is not available");
172 rc = mount(vfc.vfc_name, mountpt, mntflags, &args);
177 * Everything is ready to go - now is a good time to fork
184 * Start logging (and change name)
186 openlog("portald", LOG_CONS|LOG_PID, LOG_DAEMON);
188 q.q_forw = q.q_back = &q;
191 signal(SIGCHLD, sigchld);
192 signal(SIGHUP, sighup);
195 * Just loop waiting for new connections and activating them
198 struct sockaddr_un un2;
199 socklen_t len2 = sizeof(un2);
205 * Check whether we need to re-read the configuration file
209 printf ("re-reading configuration file\n");
217 * Accept a new connection
218 * Will get EINTR if a signal has arrived, so just
219 * ignore that error code
223 rc = select(so+1, &fdset, NULL, NULL, NULL);
227 syslog(LOG_ERR, "select: %s", strerror(errno));
232 so2 = accept(so, (struct sockaddr *) &un2, &len2);
235 * The unmount function does a shutdown on the socket
236 * which will generated ECONNABORTED on the accept.
238 if (errno == ECONNABORTED)
240 if (errno != EINTR) {
241 syslog(LOG_ERR, "accept: %s", strerror(errno));
248 * Now fork a new child to deal with the connection
251 switch (pid = fork()) {
253 if (errno == EAGAIN) {
257 syslog(LOG_ERR, "fork: %s", strerror(errno));
268 syslog(LOG_INFO, "%s unmounted", mountpt);
276 "usage: mount_portal [-o options] config mount-point\n");