1 /* $NetBSD: mount_ptyfs.c,v 1.18 2020/07/26 08:20:23 mlelstv 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
78 static char sccsid[] = "@(#)mount_ptyfs.c 8.3 (Berkeley) 5/4/95";
79 #else
80 __RCSID("$NetBSD: mount_ptyfs.c,v 1.18 2020/07/26 08:20:23 mlelstv 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 #include "mountprog.h"
102
103 #define ALTF_GROUP 0x1
104 #define ALTF_MODE 0x2
105 #define ALTF_CHROOT 0x4 /* compat */
106
107 static const struct mntopt mopts[] = {
108 MOPT_STDOPTS,
109 MOPT_GETARGS,
110 MOPT_NOATIME,
111 MOPT_RELATIME,
112 { "group", 0, ALTF_GROUP, 1 },
113 { "mode", 0, ALTF_MODE, 1 },
114 { "chroot", 0, ALTF_CHROOT, 1 }, /* compat */
115 MOPT_NULL,
116 };
117
118 int mount_ptyfs(int argc, char **argv);
119
120 static gid_t getgrp(const char *name);
121 __dead static void usage(void);
122
123 #ifndef MOUNT_NOMAIN
124 int
main(int argc,char * argv[])125 main(int argc, char *argv[])
126 {
127 return mount_ptyfs(argc, argv);
128 }
129 #endif
130
131 static gid_t
getgrp(const char * name)132 getgrp(const char *name)
133 {
134 char *ep;
135 struct group *grp;
136 long l;
137
138 if (name == NULL)
139 errx(1, "Missing group name");
140
141 l = strtol(name, &ep, 0);
142
143 if (name == ep || *ep)
144 grp = getgrnam(name);
145 else
146 grp = getgrgid((gid_t)l);
147
148 if (grp == NULL)
149 errx(1, "Cannot find group `%s'", name);
150
151 return grp->gr_gid;
152 }
153
154
155 int
mount_ptyfs(int argc,char * argv[])156 mount_ptyfs(int argc, char *argv[])
157 {
158 int ch, mntflags = 0, altflags = 0;
159 struct ptyfs_args args;
160 mntoptparse_t mp;
161 char canon_dir[MAXPATHLEN];
162
163
164 setprogname(argv[0]);
165
166 args.version = PTYFS_ARGSVERSION;
167 args.gid = getgrp("tty");
168 args.mode = S_IRUSR|S_IWUSR|S_IWGRP;
169 args.flags = 0;
170
171 while ((ch = getopt(argc, argv, "cg:m:o:")) != -1)
172 switch (ch) {
173 case 'c': /* compat */
174 compat:
175 warnx("-c and -o chroot options are obsolete");
176 break;
177 case 'o':
178 altflags = 0;
179 mp = getmntopts(optarg, mopts, &mntflags, &altflags);
180 if (mp == NULL)
181 err(1, "getmntopts");
182 if (altflags & ALTF_GROUP)
183 args.gid = getgrp(getmntoptstr(mp, "group"));
184 if (altflags & ALTF_MODE)
185 args.mode = (mode_t)getmntoptnum(mp, "mode");
186 if (altflags & ALTF_CHROOT)
187 goto compat;
188 freemntopts(mp);
189 break;
190 case 'g':
191 args.gid = getgrp(optarg);
192 break;
193 case 'm':
194 args.mode = (mode_t)strtol(optarg, NULL, 0);
195 break;
196 case '?':
197 default:
198 usage();
199 }
200
201 argc -= optind;
202 argv += optind;
203
204 if (argc != 2)
205 usage();
206
207 pathadj(argv[1], canon_dir);
208
209 if (mount(MOUNT_PTYFS, canon_dir, mntflags, &args, sizeof args) == -1)
210 err(1, "ptyfs on %s", canon_dir);
211 if (mntflags & MNT_GETARGS) {
212 printf("version=%d, gid=%lu, mode=0%o\n", args.version,
213 (unsigned long)args.gid, args.mode);
214 }
215 return 0;
216 }
217
218 static void
usage(void)219 usage(void)
220 {
221 (void)fprintf(stderr,
222 "Usage: %s [-g <group|gid>] [-m <mode>] [-o options] "
223 "ptyfs mountpoint\n", getprogname());
224 exit(1);
225 }
226