NetBSD-5.0.2/sbin/mount_lfs/mount_lfs.c
/* $NetBSD: mount_lfs.c,v 1.33 2008/08/05 20:57:45 pooka 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. 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993, 1994\
The Regents of the University of California. All rights reserved.");
#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 1.33 2008/08/05 20:57:45 pooka Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/ufsmount.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <paths.h>
#include <signal.h>
#include <mntopts.h>
#include "pathnames.h"
#include "mountprog.h"
#include "mount_lfs.h"
static const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_UPDATE,
MOPT_GETARGS,
MOPT_NOATIME,
MOPT_NULL,
};
static void usage(void);
#ifdef WANT_CLEANER
static void invoke_cleaner(char *);
static void kill_daemon(char *);
static void kill_cleaner(char *);
#endif /* WANT_CLEANER */
static int short_rds, cleaner_debug, cleaner_bytes, fs_idle, noclean;
static const char *nsegs;
#ifndef MOUNT_NOMAIN
int
main(int argc, char **argv)
{
setprogname(argv[0]);
return mount_lfs(argc, argv);
}
#endif
void
mount_lfs_parseargs(int argc, char *argv[],
struct ufs_args *args, int *mntflags,
char *canon_dev, char *canon_dir)
{
int ch;
char *options;
mntoptparse_t mp;
memset(args, 0, sizeof(*args));
options = NULL;
nsegs = "4";
*mntflags = noclean = 0;
cleaner_bytes = 1;
while ((ch = getopt(argc, argv, "bdiN:no:s")) != -1)
switch (ch) {
case 'b':
cleaner_bytes = !cleaner_bytes;
break;
case 'd':
cleaner_debug = 1;
break;
case 'i':
fs_idle = 1;
break;
case 'n':
noclean = 1;
break;
case 'N':
nsegs = optarg;
break;
case 'o':
mp = getmntopts(optarg, mopts, mntflags, 0);
if (mp == NULL)
err(1, "getmntopts");
freemntopts(mp);
break;
case 's':
short_rds = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
pathadj(argv[0], canon_dev);
args->fspec = canon_dev;
pathadj(argv[1], canon_dir);
}
int
mount_lfs(int argc, char *argv[])
{
struct ufs_args args;
int mntflags;
int mntsize, oldflags, i;
char fs_name[MAXPATHLEN], canon_dev[MAXPATHLEN];
struct statvfs *mntbuf;
const char *errcause;
mount_lfs_parseargs(argc, argv, &args, &mntflags, canon_dev, fs_name);
/*
* 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_flag;
break;
}
}
}
if (mount(MOUNT_LFS, fs_name, mntflags, &args, sizeof args) == -1) {
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);
}
#ifdef WANT_CLEANER
/* Not mounting fresh or upgrading to r/w; don't start the cleaner */
if (!(oldflags & MNT_RDONLY) || (mntflags & MNT_RDONLY)
|| (mntflags & MNT_GETARGS))
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);
#endif /* WANT_CLEANER */
exit(0);
}
#ifdef WANT_CLEANER
static void
kill_daemon(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(char *name)
{
char *pidname;
char *cp;
int off;
/* Parent first */
asprintf(&pidname, "%slfs_cleanerd:m:%s.pid", _PATH_VARRUN, name);
if (!pidname)
err(1, "malloc");
off = strlen(_PATH_VARRUN);
while((cp = strchr(pidname + off, '/')) != NULL)
*cp = '|';
kill_daemon(pidname);
free(pidname);
/* Then child */
asprintf(&pidname, "%slfs_cleanerd:s:%s.pid", _PATH_VARRUN, name);
if (!pidname)
err(1, "malloc");
off = strlen(_PATH_VARRUN);
while((cp = strchr(pidname + off, '/')) != NULL)
*cp = '|';
kill_daemon(pidname);
free(pidname);
}
static void
invoke_cleaner(char *name)
{
const char *args[7], **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";
if (fs_idle)
*ap++ = "-f";
*ap++ = name;
*ap = NULL;
execv(args[0], __UNCONST(args));
err(1, "exec %s", _PATH_LFS_CLEANERD);
}
#endif /* WANT_CLEANER */
static void
usage(void)
{
(void)fprintf(stderr,
"usage: %s [-bdins] [-N nsegs] [-o options] special node\n",
getprogname());
exit(1);
}