/* $NetBSD: mount_lfs.c,v 1.12 2000/11/13 22:12:49 perseant Exp $ */ /*- * Copyright (c) 1993, 1994 * The Regents of the University of California. All rights reserved. * * 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 #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)mount_lfs.c 8.4 (Berkeley) 4/26/95"; #else __RCSID("$NetBSD: mount_lfs.c,v 1.12 2000/11/13 22:12:49 perseant Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include "mntopts.h" #include "pathnames.h" static const struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_UPDATE, { NULL } }; int main __P((int, char *[])); int mount_lfs __P((int, char *[])); static void invoke_cleaner __P((char *)); static void usage __P((void)); static void kill_daemon __P((char *)); static void kill_cleaner __P((char *)); static int short_rds, cleaner_debug, cleaner_bytes; static char *nsegs; #ifndef MOUNT_NOMAIN int main(argc, argv) int argc; char **argv; { return mount_lfs(argc, argv); } #endif int mount_lfs(argc, argv) int argc; char *argv[]; { struct ufs_args args; int ch, mntflags, noclean, mntsize, oldflags, i; char *fs_name, *options; const char *errcause; struct statfs *mntbuf; options = NULL; nsegs = "4"; mntflags = noclean = 0; cleaner_bytes = 1; while ((ch = getopt(argc, argv, "dN:no:s")) != -1) switch (ch) { case 'b': cleaner_bytes = !cleaner_bytes; break; case 'd': cleaner_debug = 1; break; case 'n': noclean = 1; break; case 'N': nsegs = optarg; break; case 'o': getmntopts(optarg, mopts, &mntflags, 0); break; case 's': short_rds = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc != 2) usage(); args.fspec = argv[0]; /* the name of the device file */ fs_name = argv[1]; /* the mount point */ #define DEFAULT_ROOTUID -2 args.export.ex_root = DEFAULT_ROOTUID; if (mntflags & MNT_RDONLY) { args.export.ex_flags = MNT_EXRDONLY; noclean = 1; } else args.export.ex_flags = 0; /* * Record the previous status of this filesystem (if any) before * performing the mount, so we can know whether to start or * kill the cleaner process below. */ oldflags = MNT_RDONLY; /* If not mounted, pretend r/o */ if (mntflags & MNT_UPDATE) { if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) err(1, "getmntinfo"); for (i = 0; i < mntsize; i++) { if (strcmp(mntbuf[i].f_mntfromname, args.fspec) == 0) { oldflags = mntbuf[i].f_flags; break; } } } if (mount(MOUNT_LFS, fs_name, mntflags, &args)) { switch (errno) { case EMFILE: errcause = "mount table full"; break; case EINVAL: if (mntflags & MNT_UPDATE) errcause = "specified device does not match mounted device"; else errcause = "incorrect super block"; break; default: errcause = strerror(errno); break; } errx(1, "%s on %s: %s", args.fspec, fs_name, errcause); } /* Not mounting fresh or upgrading to r/w; don't start the cleaner */ if (!(oldflags & MNT_RDONLY) || (mntflags & MNT_RDONLY)) noclean = 1; if (!noclean) invoke_cleaner(fs_name); /* NOTREACHED */ /* Downgrade to r/o; kill the cleaner */ if ((mntflags & MNT_RDONLY) && !(oldflags & MNT_RDONLY)) kill_cleaner(fs_name); exit(0); } static void kill_daemon(pidname) char *pidname; { FILE *fp; char s[80]; pid_t pid; fp = fopen(pidname, "r"); if (fp) { fgets(s, 80, fp); pid = atoi(s); if (pid) kill(pid, SIGINT); fclose(fp); } } static void kill_cleaner(name) char *name; { char *pidname; char *cp; int off; /* Parent first */ pidname = malloc(strlen(name) + 20 + strlen(_PATH_VARRUN)); sprintf(pidname, "%slfs_cleanerd:m:%s.pid", _PATH_VARRUN, name); off = strlen(_PATH_VARRUN); while((cp = strchr(pidname + off, '/')) != NULL) *cp = '|'; kill_daemon(pidname); /* Then child */ sprintf(pidname, "%slfs_cleanerd:s:%s.pid", _PATH_VARRUN, name); off = strlen(_PATH_VARRUN); while((cp = strchr(pidname + off, '/')) != NULL) *cp = '|'; kill_daemon(pidname); } static void invoke_cleaner(name) char *name; { char *args[6], **ap = args; /* Build the argument list. */ *ap++ = _PATH_LFS_CLEANERD; if (cleaner_bytes) *ap++ = "-b"; if (nsegs) { *ap++ = "-n"; *ap++ = nsegs; } if (short_rds) *ap++ = "-s"; if (cleaner_debug) *ap++ = "-d"; *ap++ = name; *ap = NULL; execv(args[0], args); err(1, "exec %s", _PATH_LFS_CLEANERD); } static void usage() { (void)fprintf(stderr, "usage: mount_lfs [-dns] [-o options] special node\n"); exit(1); }