1 /*
2 * Copyright (c) 1997-2014 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *
36 * File: am-utils/amd/ops_pcfs.c
37 *
38 */
39
40 /*
41 * PC (MS-DOS) file system
42 */
43
44 #ifdef HAVE_CONFIG_H
45 # include <config.h>
46 #endif /* HAVE_CONFIG_H */
47 #include <am_defs.h>
48 #include <amd.h>
49
50 /* forward definitions */
51 static char *pcfs_match(am_opts *fo);
52 static int pcfs_mount(am_node *am, mntfs *mf);
53 static int pcfs_umount(am_node *am, mntfs *mf);
54
55 /*
56 * Ops structure
57 */
58 am_ops pcfs_ops =
59 {
60 "pcfs",
61 pcfs_match,
62 0, /* pcfs_init */
63 pcfs_mount,
64 pcfs_umount,
65 amfs_error_lookup_child,
66 amfs_error_mount_child,
67 amfs_error_readdir,
68 0, /* pcfs_readlink */
69 0, /* pcfs_mounted */
70 0, /* pcfs_umounted */
71 amfs_generic_find_srvr,
72 0, /* pcfs_get_wchan */
73 FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
74 #ifdef HAVE_FS_AUTOFS
75 AUTOFS_PCFS_FS_FLAGS,
76 #endif /* HAVE_FS_AUTOFS */
77 };
78
79
80
81 /*
82 * PCFS needs remote filesystem.
83 */
84 static char *
pcfs_match(am_opts * fo)85 pcfs_match(am_opts *fo)
86 {
87 if (!fo->opt_dev) {
88 plog(XLOG_USER, "pcfs: no source device specified");
89 return 0;
90 }
91 dlog("PCFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
92
93 /*
94 * Determine magic cookie to put in mtab
95 */
96 return xstrdup(fo->opt_dev);
97 }
98
99
100 static int
mount_pcfs(char * mntdir,char * fs_name,char * opts,int on_autofs)101 mount_pcfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
102 {
103 pcfs_args_t pcfs_args;
104 mntent_t mnt;
105 int flags;
106 #if defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK)
107 int mask;
108 #endif /* defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK) */
109 #if defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID)
110 char *str;
111 #endif /* defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID) */
112
113 /*
114 * Figure out the name of the file system type.
115 */
116 MTYPE_TYPE type = MOUNT_TYPE_PCFS;
117
118 memset((voidp) &pcfs_args, 0, sizeof(pcfs_args)); /* Paranoid */
119
120 /*
121 * Fill in the mount structure
122 */
123 memset((voidp) &mnt, 0, sizeof(mnt));
124 mnt.mnt_dir = mntdir;
125 mnt.mnt_fsname = fs_name;
126 mnt.mnt_type = MNTTAB_TYPE_PCFS;
127 mnt.mnt_opts = opts;
128
129 flags = compute_mount_flags(&mnt);
130 #ifdef HAVE_FS_AUTOFS
131 if (on_autofs)
132 flags |= autofs_compute_mount_flags(&mnt);
133 #endif /* HAVE_FS_AUTOFS */
134 if (amuDebug(D_TRACE))
135 plog(XLOG_DEBUG, "mount_pcfs: flags=0x%x", (u_int) flags);
136
137 #ifdef HAVE_PCFS_ARGS_T_FSPEC
138 pcfs_args.fspec = fs_name;
139 #endif /* HAVE_PCFS_ARGS_T_FSPEC */
140
141 #ifdef HAVE_PCFS_ARGS_T_MASK
142 pcfs_args.mask = 0777; /* this may be the msdos file modes */
143 if ((mask = hasmntval(&mnt, MNTTAB_OPT_MASK)) > 0)
144 pcfs_args.mask = mask;
145 if (amuDebug(D_TRACE))
146 plog(XLOG_DEBUG, "mount_pcfs: mask=%o (octal)", (u_int) pcfs_args.mask);
147 #endif /* HAVE_PCFS_ARGS_T_MASK */
148
149 #ifdef HAVE_PCFS_ARGS_T_DIRMASK
150 pcfs_args.dirmask = 0777; /* this may be the msdos dir modes */
151 if ((mask = hasmntval(&mnt, MNTTAB_OPT_DIRMASK)) > 0)
152 pcfs_args.dirmask = mask;
153 if (amuDebug(D_TRACE))
154 plog(XLOG_DEBUG, "mount_pcfs: dirmask=%o (octal)", (u_int) pcfs_args.dirmask);
155 #endif /* HAVE_PCFS_ARGS_T_DIRMASK */
156
157 #ifdef HAVE_PCFS_ARGS_T_UID
158 pcfs_args.uid = 0; /* default to root */
159 if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
160 struct passwd *pw;
161 if ((pw = getpwnam(str)) != NULL)
162 pcfs_args.uid = pw->pw_uid;
163 else /* maybe used passed a UID number, not user name */
164 pcfs_args.uid = atoi(str); /* atoi returns '0' if it failed */
165 XFREE(str);
166 }
167 if (amuDebug(D_TRACE))
168 plog(XLOG_DEBUG, "mount_pcfs: uid=%d", (int) pcfs_args.uid);
169 #endif /* HAVE_PCFS_ARGS_T_UID */
170
171 #ifdef HAVE_PCFS_ARGS_T_GID
172 pcfs_args.gid = 0; /* default to wheel/root group */
173 if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
174 struct group *gr;
175 if ((gr = getgrnam(str)) != NULL)
176 pcfs_args.gid = gr->gr_gid;
177 else /* maybe used passed a GID number, not group name */
178 pcfs_args.gid = atoi(str); /* atoi returns '0' if it failed */
179 XFREE(str);
180 }
181 if (amuDebug(D_TRACE))
182 plog(XLOG_DEBUG, "mount_pcfs: gid=%d", (int) pcfs_args.gid);
183 #endif /* HAVE_PCFS_ARGS_T_GID */
184
185 #ifdef HAVE_PCFS_ARGS_T_SECONDSWEST
186 pcfs_args.secondswest = 0; /* XXX: fill in correct values */
187 #endif /* HAVE_PCFS_ARGS_T_SECONDSWEST */
188 #ifdef HAVE_PCFS_ARGS_T_DSTTIME
189 pcfs_args.dsttime = 0; /* XXX: fill in correct values */
190 #endif /* HAVE_PCFS_ARGS_T_DSTTIME */
191
192 /*
193 * Call generic mount routine
194 */
195 return mount_fs(&mnt, flags, (caddr_t) & pcfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
196 }
197
198
199 static int
pcfs_mount(am_node * am,mntfs * mf)200 pcfs_mount(am_node *am, mntfs *mf)
201 {
202 int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
203 int error;
204
205 error = mount_pcfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
206 if (error) {
207 errno = error;
208 plog(XLOG_ERROR, "mount_pcfs: %m");
209 return error;
210 }
211
212 return 0;
213 }
214
215
216 static int
pcfs_umount(am_node * am,mntfs * mf)217 pcfs_umount(am_node *am, mntfs *mf)
218 {
219 int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
220
221 return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
222 }
223