NetBSD/sbin/mount_ptyfs/mount_ptyfs.c

216 lines
6.4 KiB
C

/* $NetBSD: mount_ptyfs.c,v 1.5 2006/03/21 21:11:42 christos Exp $ */
/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed 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. 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.
*/
/*
* Copyright (c) 1990, 1992 Jan-Simon Pendry
*
* This code is derived from software contributed 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 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_ptyfs.c 8.3 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: mount_ptyfs.c,v 1.5 2006/03/21 21:11:42 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <fs/ptyfs/ptyfs.h>
#include <err.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <grp.h>
#include <mntopts.h>
#define ALTF_GROUP 1
#define ALTF_MODE 2
static const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_GETARGS,
{ "group", 0, ALTF_GROUP, 1 },
{ "mode", 0, ALTF_MODE, 1 },
{ NULL }
};
int main(int, char *[]);
int mount_ptyfs(int argc, char **argv);
static gid_t getgrp(const char *name);
static void usage(void);
#ifndef MOUNT_NOMAIN
int
main(int argc, char *argv[])
{
return mount_ptyfs(argc, argv);
}
#endif
static gid_t
getgrp(const char *name)
{
char *ep;
struct group *grp;
long l;
if (name == NULL)
errx(1, "Missing group name");
l = strtol(name, &ep, 0);
if (name == ep || *ep)
grp = getgrnam(name);
else
grp = getgrgid((gid_t)l);
if (grp == NULL)
errx(1, "Cannot find group `%s'", name);
return grp->gr_gid;
}
int
mount_ptyfs(int argc, char *argv[])
{
int ch, mntflags = 0, altflags = 0;
struct ptyfs_args args;
mntoptparse_t mp;
char canon_dir[MAXPATHLEN];
setprogname(argv[0]);
args.version = PTYFS_ARGSVERSION;
args.gid = getgrp("tty");
args.mode = S_IRUSR|S_IWUSR|S_IWGRP;
while ((ch = getopt(argc, argv, "g:m:o:")) != -1)
switch (ch) {
case 'o':
altflags = 0;
mp = getmntopts(optarg, mopts, &mntflags, &altflags);
if (mp == NULL)
err(1, "getmntopts");
if (altflags & ALTF_GROUP)
args.gid = getgrp(getmntoptstr(mp, "group"));
if (altflags & ALTF_MODE)
args.mode = (mode_t)getmntoptnum(mp, "mode");
freemntopts(mp);
break;
case 'g':
args.gid = getgrp(optarg);
break;
case 'm':
args.mode = (mode_t)strtol(optarg, NULL, 0);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */
err(1, "realpath %s", argv[1]);
if (strncmp(argv[1], canon_dir, MAXPATHLEN)) {
warnx("\"%s\" is a relative path.", argv[1]);
warnx("using \"%s\" instead.", canon_dir);
}
if (mount(MOUNT_PTYFS, canon_dir, mntflags, &args))
err(1, "ptyfs on %s", canon_dir);
if (mntflags & MNT_GETARGS)
printf("version=%d, gid=%lu, mode=0%o\n", args.version,
(unsigned long)args.gid, args.mode);
return 0;
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-g <group|gid>] [-m <mode>] [-o options] ptyfs mountpoint\n", getprogname());
exit(1);
}