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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36 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)mount_portal.c 8.6 (Berkeley) 4/26/95
38 * $FreeBSD: src/sbin/mount_portal/mount_portal.c,v 1.16 1999/10/09 11:54:11 phk Exp $
39 * $DragonFly: src/sbin/mount_portal/mount_portal.c,v 1.2 2003/06/17 04:27:33 dillon Exp $
42 #include <sys/param.h>
44 #include <sys/socket.h>
47 #include <sys/syslog.h>
48 #include <sys/mount.h>
59 #include "pathnames.h"
62 struct mntopt mopts[] = {
67 static void usage __P((void)) __dead2;
69 static sig_atomic_t readcf; /* Set when SIGHUP received */
71 static void sighup(sig)
77 static void sigchld(sig)
82 while ((pid = waitpid((pid_t) -1, (int *) 0, WNOHANG)) > 0)
84 /* wrtp - waitpid _doesn't_ return 0 when no children! */
86 if (pid < 0 && errno != ECHILD)
87 syslog(LOG_WARNING, "waitpid: %s", strerror(errno));
96 struct portal_args args;
97 struct sockaddr_un un;
99 char mountpt[MAXPATHLEN];
111 * Crack command line args
115 while ((ch = getopt(argc, argv, "o:")) != -1) {
118 getmntopts(optarg, mopts, &mntflags, 0);
126 if (optind != (argc - 2))
133 * Get config file and mount point
137 /* resolve the mountpoint with realpath(3) */
138 (void)checkpath(argv[optind+1], mountpt);
141 * Construct the listening socket
143 un.sun_family = AF_UNIX;
144 if (sizeof(_PATH_TMPPORTAL) >= sizeof(un.sun_path)) {
145 errx(EX_SOFTWARE, "portal socket name too long");
147 strcpy(un.sun_path, _PATH_TMPPORTAL);
149 un.sun_len = strlen(un.sun_path);
151 so = socket(AF_UNIX, SOCK_STREAM, 0);
153 err(EX_OSERR, "socket");
156 (void) unlink(un.sun_path);
157 if (bind(so, (struct sockaddr *) &un, sizeof(un)) < 0)
160 (void) unlink(un.sun_path);
163 (void) listen(so, 5);
166 sprintf(tag, "portal:%d", getpid());
167 args.pa_config = tag;
169 error = getvfsbyname("portal", &vfc);
170 if (error && vfsisloadable("portal")) {
171 if (vfsload("portal"))
172 err(EX_OSERR, "vfsload(portal)");
174 error = getvfsbyname("portal", &vfc);
177 errx(EX_OSERR, "portal filesystem is not available");
179 rc = mount(vfc.vfc_name, mountpt, mntflags, &args);
184 * Everything is ready to go - now is a good time to fork
191 * Start logging (and change name)
193 openlog("portald", LOG_CONS|LOG_PID, LOG_DAEMON);
195 q.q_forw = q.q_back = &q;
198 signal(SIGCHLD, sigchld);
199 signal(SIGHUP, sighup);
202 * Just loop waiting for new connections and activating them
205 struct sockaddr_un un2;
206 int len2 = sizeof(un2);
213 * Check whether we need to re-read the configuration file
217 printf ("re-reading configuration file\n");
225 * Accept a new connection
226 * Will get EINTR if a signal has arrived, so just
227 * ignore that error code
231 rc = select(so+1, &fdset, (fd_set *) 0, (fd_set *) 0, (struct timeval *) 0);
235 syslog(LOG_ERR, "select: %s", strerror(errno));
240 so2 = accept(so, (struct sockaddr *) &un2, &len2);
243 * The unmount function does a shutdown on the socket
244 * which will generated ECONNABORTED on the accept.
246 if (errno == ECONNABORTED)
248 if (errno != EINTR) {
249 syslog(LOG_ERR, "accept: %s", strerror(errno));
256 * Now fork a new child to deal with the connection
259 switch (pid = fork()) {
261 if (errno == EAGAIN) {
265 syslog(LOG_ERR, "fork: %s", strerror(errno));
276 syslog(LOG_INFO, "%s unmounted", mountpt);
283 (void)fprintf(stderr,
284 "usage: mount_portal [-o options] config mount-point\n");