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 1.6 2005/11/06 12:36:40 swildner 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(void) __dead2;
69 static sig_atomic_t readcf; /* Set when SIGHUP received */
82 while ((pid = waitpid((pid_t) -1, NULL, 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));
92 main(int argc, char **argv)
94 struct portal_args args;
95 struct sockaddr_un un;
97 char mountpt[MAXPATHLEN];
109 * Crack command line args
113 while ((ch = getopt(argc, argv, "o:")) != -1) {
116 getmntopts(optarg, mopts, &mntflags, 0);
124 if (optind != (argc - 2))
131 * Get config file and mount point
135 /* resolve the mountpoint with realpath(3) */
136 checkpath(argv[optind+1], mountpt);
139 * Construct the listening socket
141 un.sun_family = AF_UNIX;
142 if (sizeof(_PATH_TMPPORTAL) >= sizeof(un.sun_path)) {
143 errx(EX_SOFTWARE, "portal socket name too long");
145 strcpy(un.sun_path, _PATH_TMPPORTAL);
147 un.sun_len = strlen(un.sun_path);
149 so = socket(AF_UNIX, SOCK_STREAM, 0);
151 err(EX_OSERR, "socket");
155 if (bind(so, (struct sockaddr *) &un, sizeof(un)) < 0)
164 sprintf(tag, "portal:%d", getpid());
165 args.pa_config = tag;
167 error = getvfsbyname("portal", &vfc);
168 if (error && vfsisloadable("portal")) {
169 if (vfsload("portal"))
170 err(EX_OSERR, "vfsload(portal)");
172 error = getvfsbyname("portal", &vfc);
175 errx(EX_OSERR, "portal filesystem is not available");
177 rc = mount(vfc.vfc_name, mountpt, mntflags, &args);
182 * Everything is ready to go - now is a good time to fork
189 * Start logging (and change name)
191 openlog("portald", LOG_CONS|LOG_PID, LOG_DAEMON);
193 q.q_forw = q.q_back = &q;
196 signal(SIGCHLD, sigchld);
197 signal(SIGHUP, sighup);
200 * Just loop waiting for new connections and activating them
203 struct sockaddr_un un2;
204 int len2 = sizeof(un2);
211 * Check whether we need to re-read the configuration file
215 printf ("re-reading configuration file\n");
223 * Accept a new connection
224 * Will get EINTR if a signal has arrived, so just
225 * ignore that error code
229 rc = select(so+1, &fdset, NULL, NULL, NULL);
233 syslog(LOG_ERR, "select: %s", strerror(errno));
238 so2 = accept(so, (struct sockaddr *) &un2, &len2);
241 * The unmount function does a shutdown on the socket
242 * which will generated ECONNABORTED on the accept.
244 if (errno == ECONNABORTED)
246 if (errno != EINTR) {
247 syslog(LOG_ERR, "accept: %s", strerror(errno));
254 * Now fork a new child to deal with the connection
257 switch (pid = fork()) {
259 if (errno == EAGAIN) {
263 syslog(LOG_ERR, "fork: %s", strerror(errno));
274 syslog(LOG_INFO, "%s unmounted", mountpt);
282 "usage: mount_portal [-o options] config mount-point\n");