/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * 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. */ #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)); } 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, 0); 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("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); /* * 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_SET(so, &fdset); rc = select(so+1, &fdset, (void *) 0, (void *) 0, (void *) 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); }