1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <locale.h>
29 #include <stdio.h>
30 #include <time.h>
31 #include <signal.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <stdlib.h>
35 #include <errno.h>
36 #include <sys/mntent.h>
37 #include <sys/mnttab.h>
38 #include <sys/mount.h>
39 #include <sys/fs/pc_fs.h>
40 #include <fslib.h>
41
42 extern int daylight;
43
44 static int roflag = 0;
45 static char optbuf[MAX_MNTOPT_STR] = { '\0', };
46 static int optsize = 0;
47
48
49 /*
50 * Since the format/value expected for the mount options listed below
51 * differs between what the user mount command expects and what the
52 * kernel module can grok, we transmogrify the mount option string
53 * for such options. Others are copied through as-is.
54 */
55 static char *pcfs_opts[] = { MNTOPT_PCFS_TIMEZONE, NULL };
56 #define ARG_PCFS_TIMEZONE 0
57
58 /*
59 * While constructing the mount option string, we need to append
60 * comma separators if there have been previous options copied over
61 * from the input string. This takes care of it.
62 */
63 static int
append_opt(char * str,int strsz,char * opt)64 append_opt(char *str, int strsz, char *opt)
65 {
66 if (str[0] != '\0' && strlcat(str, ",", strsz) >= strsz)
67 return (0);
68
69 return (strlcat(str, opt, strsz) < strsz);
70 }
71
72 int
main(int argc,char * argv[])73 main(int argc, char *argv[])
74 {
75 char *mnt_special;
76 char *mnt_mountp;
77 int c;
78 char *myname;
79 char typename[64];
80 char tzstr[100];
81 char *tzval;
82 char *savedoptbuf = NULL, *savedoptarg = NULL;
83 char *in_arg, *val, *curarg;
84 extern int optind;
85 extern char *optarg;
86 int error = 0;
87 int verbose = 0;
88 int mflg = MS_OPTIONSTR; /* we always pass mount options */
89 int qflg = 0;
90 int optcnt = 0;
91 int tzdone = 0;
92
93 myname = strrchr(argv[0], '/');
94 myname = myname ? myname + 1 : argv[0];
95 (void) snprintf(typename, sizeof (typename), "%s_%s",
96 MNTTYPE_PCFS, myname);
97 argv[0] = typename;
98
99 while ((c = getopt(argc, argv, "Vvmr?o:Oq")) != EOF) {
100 switch (c) {
101 case 'V':
102 case 'v':
103 verbose++;
104 break;
105 case '?':
106 error++;
107 break;
108 case 'r':
109 roflag++;
110 break;
111 case 'm':
112 mflg |= MS_NOMNTTAB;
113 break;
114 case 'o':
115 in_arg = optarg;
116 if ((savedoptarg = strdup(optarg)) == NULL) {
117 (void) fprintf(stderr,
118 gettext("%s: out of memory\n"), myname);
119 exit(2);
120 }
121 while (*in_arg != '\0') {
122 curarg = in_arg;
123
124 switch (getsubopt(&in_arg, pcfs_opts, &val)) {
125 case ARG_PCFS_TIMEZONE:
126 if (tzdone || val == NULL)
127 goto invalarg;
128 tzval = val;
129 (void) snprintf(tzstr, 100,
130 "TZ=%s", tzval);
131 tzstr[99] = '\0';
132 (void) putenv(tzstr);
133 tzdone = 1;
134 break;
135 default:
136 /*
137 * Remove empty suboptions
138 * (happens on sequences of commas)
139 */
140 if (*curarg == '\0')
141 break;
142
143 if (append_opt(optbuf, sizeof (optbuf),
144 curarg) == 0)
145 goto invalarg;
146 }
147 }
148 break;
149 case 'O':
150 mflg |= MS_OVERLAY;
151 break;
152 case 'q':
153 qflg = 1;
154 break;
155 }
156 }
157
158 if (verbose && !error) {
159 char *optptr;
160
161 (void) fprintf(stderr, "%s", typename);
162 for (optcnt = 1; optcnt < argc; optcnt++) {
163 optptr = argv[optcnt];
164 if (optptr)
165 (void) fprintf(stderr, " %s", optptr);
166 }
167 (void) fprintf(stderr, "\n");
168 }
169
170 if (argc - optind != 2 || error) {
171 /*
172 * don't hint at options yet (none are really supported)
173 */
174 (void) fprintf(stderr, gettext(
175 "Usage: %s [generic options] [-o suboptions] "
176 "special mount_point\n"), typename);
177 (void) fprintf(stderr, gettext(
178 "\tpcfs-specific suboptions are:\n"
179 "\t clamptime,noclamptime\n"
180 "\t hidden,nohidden\n"
181 "\t atime,noatime\n"
182 "\t foldcase,nofoldcase\n"
183 "\t timezone=<valid TZ string>"));
184 exit(32);
185 }
186
187 mnt_special = argv[optind++];
188 mnt_mountp = argv[optind++];
189
190 /*
191 * Pass timezone information to the kernel module so that
192 * FAT timestamps, as per spec, can be recorded in local time.
193 */
194 tzset();
195 /*
196 * We perform this validation only in case the user of
197 * mount(8) specified the "timezone=..." option. That's
198 * because we don't want PCFS mounts to fail due to a
199 * botched $TZ environment variable. If the admin's
200 * environment contains garbage, it'll just parse as
201 * GMT (timezone=0).
202 */
203 if (tzdone && timezone == 0 && altzone == 0 && daylight == 0 &&
204 strcmp(tzname[0], tzval) &&
205 strspn(tzname[1], " ") == strlen(tzname[1])) {
206 goto invalarg;
207 }
208 (void) snprintf(tzstr, 100, "timezone=%d", timezone);
209 tzstr[99] = '\0';
210 if (append_opt(optbuf, sizeof (optbuf), tzstr) == 0)
211 goto invalarg;
212
213 optsize = strlen(optbuf);
214
215 if (roflag)
216 mflg |= MS_RDONLY;
217
218 if ((savedoptbuf = strdup(optbuf)) == NULL) {
219 (void) fprintf(stderr, gettext("%s: out of memory\n"),
220 myname);
221 exit(2);
222 }
223 (void) signal(SIGHUP, SIG_IGN);
224 (void) signal(SIGQUIT, SIG_IGN);
225 (void) signal(SIGINT, SIG_IGN);
226
227 if (verbose) {
228 (void) fprintf(stderr, "mount(%s, \"%s\", %d, %s",
229 mnt_special, mnt_mountp, mflg, MNTTYPE_PCFS);
230 }
231 if (mount(mnt_special, mnt_mountp, mflg, MNTTYPE_PCFS,
232 NULL, 0, optbuf, MAX_MNTOPT_STR)) {
233 if (errno == EBUSY) {
234 (void) fprintf(stderr, gettext(
235 "mount: %s is already mounted or %s is busy\n"),
236 mnt_special, mnt_mountp);
237 } else if (errno == EINVAL) {
238 (void) fprintf(stderr, gettext(
239 "mount: %s is not a DOS filesystem.\n"),
240 mnt_special);
241 } else {
242 perror("mount");
243 }
244 exit(32);
245 }
246
247 if (optsize && !qflg)
248 cmp_requested_to_actual_options(savedoptbuf, optbuf,
249 mnt_special, mnt_mountp);
250 return (0);
251
252 invalarg:
253 (void) fprintf(stderr,
254 gettext("%s: Invalid mount options: %s\n"), myname, savedoptarg);
255 return (2);
256 }
257