mount_ptyfs.c revision 1.16
1/* $NetBSD: mount_ptyfs.c,v 1.16 2016/02/21 22:51:29 christos Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Jan-Simon Pendry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35/* 36 * Copyright (c) 1990, 1992 Jan-Simon Pendry 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Jan-Simon Pendry. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70#include <sys/cdefs.h> 71#ifndef lint 72__COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\ 73 The Regents of the University of California. All rights reserved."); 74#endif /* not lint */ 75 76#ifndef lint 77#if 0 78static char sccsid[] = "@(#)mount_ptyfs.c 8.3 (Berkeley) 5/4/95"; 79#else 80__RCSID("$NetBSD: mount_ptyfs.c,v 1.16 2016/02/21 22:51:29 christos Exp $"); 81#endif 82#endif /* not lint */ 83 84#include <sys/param.h> 85#include <sys/types.h> 86#include <sys/mount.h> 87#include <sys/stat.h> 88 89#include <fs/ptyfs/ptyfs.h> 90 91#include <err.h> 92#include <unistd.h> 93#include <stdio.h> 94#include <stdlib.h> 95#include <string.h> 96#include <grp.h> 97#include <util.h> 98 99#include <mntopts.h> 100 101#define ALTF_GROUP 0x1 102#define ALTF_MODE 0x2 103#define ALTF_CHROOT 0x4 /* compat */ 104 105static const struct mntopt mopts[] = { 106 MOPT_STDOPTS, 107 MOPT_GETARGS, 108 MOPT_NOATIME, 109 MOPT_RELATIME, 110 { "group", 0, ALTF_GROUP, 1 }, 111 { "mode", 0, ALTF_MODE, 1 }, 112 { "chroot", 0, ALTF_CHROOT, 1 }, /* compat */ 113 MOPT_NULL, 114}; 115 116int main(int, char *[]); 117int mount_ptyfs(int argc, char **argv); 118 119static gid_t getgrp(const char *name); 120__dead static void usage(void); 121 122#ifndef MOUNT_NOMAIN 123int 124main(int argc, char *argv[]) 125{ 126 return mount_ptyfs(argc, argv); 127} 128#endif 129 130static gid_t 131getgrp(const char *name) 132{ 133 char *ep; 134 struct group *grp; 135 long l; 136 137 if (name == NULL) 138 errx(1, "Missing group name"); 139 140 l = strtol(name, &ep, 0); 141 142 if (name == ep || *ep) 143 grp = getgrnam(name); 144 else 145 grp = getgrgid((gid_t)l); 146 147 if (grp == NULL) 148 errx(1, "Cannot find group `%s'", name); 149 150 return grp->gr_gid; 151} 152 153 154int 155mount_ptyfs(int argc, char *argv[]) 156{ 157 int ch, mntflags = 0, altflags = 0; 158 struct ptyfs_args args; 159 mntoptparse_t mp; 160 char canon_dir[MAXPATHLEN]; 161 162 163 setprogname(argv[0]); 164 165 args.version = PTYFS_ARGSVERSION; 166 args.gid = getgrp("tty"); 167 args.mode = S_IRUSR|S_IWUSR|S_IWGRP; 168 args.flags = 0; 169 170 while ((ch = getopt(argc, argv, "cg:m:o:")) != -1) 171 switch (ch) { 172 case 'c': /* compat */ 173 compat: 174 warnx("-c and -o chroot options are obsolete"); 175 break; 176 case 'o': 177 altflags = 0; 178 mp = getmntopts(optarg, mopts, &mntflags, &altflags); 179 if (mp == NULL) 180 err(1, "getmntopts"); 181 if (altflags & ALTF_GROUP) 182 args.gid = getgrp(getmntoptstr(mp, "group")); 183 if (altflags & ALTF_MODE) 184 args.mode = (mode_t)getmntoptnum(mp, "mode"); 185 if (altflags & ALTF_CHROOT) 186 goto compat; 187 freemntopts(mp); 188 break; 189 case 'g': 190 args.gid = getgrp(optarg); 191 break; 192 case 'm': 193 args.mode = (mode_t)strtol(optarg, NULL, 0); 194 break; 195 case '?': 196 default: 197 usage(); 198 } 199 200 argc -= optind; 201 argv += optind; 202 203 if (argc != 2) 204 usage(); 205 206 if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */ 207 err(1, "realpath %s", argv[1]); 208 if (strncmp(argv[1], canon_dir, MAXPATHLEN)) { 209 warnx("\"%s\" is a relative path.", argv[1]); 210 warnx("using \"%s\" instead.", canon_dir); 211 } 212 213 if (mount(MOUNT_PTYFS, canon_dir, mntflags, &args, sizeof args) == -1) 214 err(1, "ptyfs on %s", canon_dir); 215 if (mntflags & MNT_GETARGS) { 216 printf("version=%d, gid=%lu, mode=0%o\n", args.version, 217 (unsigned long)args.gid, args.mode); 218 } 219 return 0; 220} 221 222static void 223usage(void) 224{ 225 (void)fprintf(stderr, 226 "Usage: %s [-g <group|gid>] [-m <mode>] [-o options] " 227 "ptyfs mountpoint\n", getprogname()); 228 exit(1); 229} 230