229 lines
6.7 KiB
C
229 lines
6.7 KiB
C
/* $NetBSD: mount_ptyfs.c,v 1.17 2016/09/05 01:09:57 sevan Exp $ */
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/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1990, 1992 Jan-Simon Pendry
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mount_ptyfs.c 8.3 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: mount_ptyfs.c,v 1.17 2016/09/05 01:09:57 sevan Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <fs/ptyfs/ptyfs.h>
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#include <err.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <grp.h>
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#include <util.h>
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#include <mntopts.h>
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#define ALTF_GROUP 0x1
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#define ALTF_MODE 0x2
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#define ALTF_CHROOT 0x4 /* compat */
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static const struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_GETARGS,
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MOPT_NOATIME,
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MOPT_RELATIME,
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{ "group", 0, ALTF_GROUP, 1 },
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{ "mode", 0, ALTF_MODE, 1 },
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{ "chroot", 0, ALTF_CHROOT, 1 }, /* compat */
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MOPT_NULL,
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};
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int mount_ptyfs(int argc, char **argv);
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static gid_t getgrp(const char *name);
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__dead static void usage(void);
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#ifndef MOUNT_NOMAIN
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int
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main(int argc, char *argv[])
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{
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return mount_ptyfs(argc, argv);
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}
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#endif
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static gid_t
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getgrp(const char *name)
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{
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char *ep;
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struct group *grp;
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long l;
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if (name == NULL)
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errx(1, "Missing group name");
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l = strtol(name, &ep, 0);
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if (name == ep || *ep)
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grp = getgrnam(name);
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else
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grp = getgrgid((gid_t)l);
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if (grp == NULL)
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errx(1, "Cannot find group `%s'", name);
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return grp->gr_gid;
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}
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int
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mount_ptyfs(int argc, char *argv[])
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{
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int ch, mntflags = 0, altflags = 0;
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struct ptyfs_args args;
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mntoptparse_t mp;
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char canon_dir[MAXPATHLEN];
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setprogname(argv[0]);
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args.version = PTYFS_ARGSVERSION;
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args.gid = getgrp("tty");
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args.mode = S_IRUSR|S_IWUSR|S_IWGRP;
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args.flags = 0;
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while ((ch = getopt(argc, argv, "cg:m:o:")) != -1)
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switch (ch) {
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case 'c': /* compat */
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compat:
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warnx("-c and -o chroot options are obsolete");
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break;
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case 'o':
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altflags = 0;
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mp = getmntopts(optarg, mopts, &mntflags, &altflags);
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if (mp == NULL)
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err(1, "getmntopts");
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if (altflags & ALTF_GROUP)
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args.gid = getgrp(getmntoptstr(mp, "group"));
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if (altflags & ALTF_MODE)
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args.mode = (mode_t)getmntoptnum(mp, "mode");
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if (altflags & ALTF_CHROOT)
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goto compat;
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freemntopts(mp);
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break;
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case 'g':
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args.gid = getgrp(optarg);
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break;
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case 'm':
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args.mode = (mode_t)strtol(optarg, NULL, 0);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */
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err(1, "realpath %s", argv[1]);
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if (strncmp(argv[1], canon_dir, MAXPATHLEN)) {
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warnx("\"%s\" is a relative path.", argv[1]);
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warnx("using \"%s\" instead.", canon_dir);
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}
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if (mount(MOUNT_PTYFS, canon_dir, mntflags, &args, sizeof args) == -1)
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err(1, "ptyfs on %s", canon_dir);
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if (mntflags & MNT_GETARGS) {
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printf("version=%d, gid=%lu, mode=0%o\n", args.version,
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(unsigned long)args.gid, args.mode);
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}
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return 0;
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-g <group|gid>] [-m <mode>] [-o options] "
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"ptyfs mountpoint\n", getprogname());
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exit(1);
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}
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