1 /*
2 * util.c --- helper functions used by tune2fs and mke2fs
3 *
4 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12 #ifndef _LARGEFILE_SOURCE
13 #define _LARGEFILE_SOURCE
14 #endif
15 #ifndef _LARGEFILE64_SOURCE
16 #define _LARGEFILE64_SOURCE
17 #endif
18
19 #include "config.h"
20 #include <fcntl.h>
21 #include <setjmp.h>
22 #include <signal.h>
23 #include <stdio.h>
24 #include <string.h>
25 #ifdef HAVE_ERRNO_H
26 #include <errno.h>
27 #endif
28 #if HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #ifdef HAVE_LINUX_MAJOR_H
32 #include <linux/major.h>
33 #endif
34 #include <sys/types.h>
35 #ifdef HAVE_SYS_STAT_H
36 #include <sys/stat.h>
37 #endif
38 #ifdef HAVE_UNISTD_H
39 #include <unistd.h>
40 #endif
41 #include <time.h>
42
43 #include "et/com_err.h"
44 #include "e2p/e2p.h"
45 #include "ext2fs/ext2_fs.h"
46 #include "ext2fs/ext2fs.h"
47 #include "support/nls-enable.h"
48 #include "blkid/blkid.h"
49 #include "util.h"
50
51 char *journal_location_string = NULL;
52
53 #ifndef HAVE_STRCASECMP
strcasecmp(char * s1,char * s2)54 int strcasecmp (char *s1, char *s2)
55 {
56 while (*s1 && *s2) {
57 int ch1 = *s1++, ch2 = *s2++;
58 if (isupper (ch1))
59 ch1 = tolower (ch1);
60 if (isupper (ch2))
61 ch2 = tolower (ch2);
62 if (ch1 != ch2)
63 return ch1 - ch2;
64 }
65 return *s1 ? 1 : *s2 ? -1 : 0;
66 }
67 #endif
68
69 /*
70 * Given argv[0], return the program name.
71 */
get_progname(char * argv_zero)72 char *get_progname(char *argv_zero)
73 {
74 char *cp;
75
76 cp = strrchr(argv_zero, '/');
77 if (!cp )
78 return argv_zero;
79 else
80 return cp+1;
81 }
82
83 static jmp_buf alarm_env;
84
alarm_signal(int signal EXT2FS_ATTR ((unused)))85 static void alarm_signal(int signal EXT2FS_ATTR((unused)))
86 {
87 longjmp(alarm_env, 1);
88 }
89
proceed_question(int delay)90 void proceed_question(int delay)
91 {
92 char buf[256];
93 const char *short_yes = _("yY");
94 const char *english_yes = "yY";
95
96 fflush(stdout);
97 fflush(stderr);
98 if (delay > 0) {
99 if (setjmp(alarm_env)) {
100 signal(SIGALRM, SIG_IGN);
101 printf("%s", _("<proceeding>\n"));
102 return;
103 }
104 signal(SIGALRM, alarm_signal);
105 printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
106 delay);
107 alarm(delay);
108 } else
109 fputs(_("Proceed anyway? (y,N) "), stdout);
110 buf[0] = 0;
111 if (!fgets(buf, sizeof(buf), stdin) ||
112 strchr(_("nN"), buf[0]) ||
113 !(strchr(short_yes, buf[0]) ||
114 strchr(english_yes, buf[0]))) {
115 putc('\n', stdout);
116 exit(1);
117 }
118 signal(SIGALRM, SIG_IGN);
119 }
120
check_mount(const char * device,int force,const char * type)121 void check_mount(const char *device, int force, const char *type)
122 {
123 errcode_t retval;
124 int mount_flags;
125
126 retval = ext2fs_check_if_mounted(device, &mount_flags);
127 if (retval) {
128 com_err("ext2fs_check_if_mount", retval,
129 _("while determining whether %s is mounted."),
130 device);
131 return;
132 }
133 if (mount_flags & EXT2_MF_MOUNTED) {
134 fprintf(stderr, _("%s is mounted; "), device);
135 if (force >= 2) {
136 fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
137 "incorrect.\n"), stderr);
138 return;
139 }
140 abort_mke2fs:
141 fprintf(stderr, _("will not make a %s here!\n"), type);
142 exit(1);
143 }
144 if (mount_flags & EXT2_MF_BUSY) {
145 fprintf(stderr, _("%s is apparently in use by the system; "),
146 device);
147 if (force >= 2) {
148 fputs(_("mke2fs forced anyway.\n"), stderr);
149 return;
150 }
151 goto abort_mke2fs;
152 }
153 }
154
parse_journal_opts(const char * opts)155 void parse_journal_opts(const char *opts)
156 {
157 char *buf, *token, *next, *p, *arg;
158 int len;
159 int journal_usage = 0;
160
161 len = strlen(opts);
162 buf = malloc(len+1);
163 if (!buf) {
164 fputs(_("Couldn't allocate memory to parse journal "
165 "options!\n"), stderr);
166 exit(1);
167 }
168 strcpy(buf, opts);
169 for (token = buf; token && *token; token = next) {
170 p = strchr(token, ',');
171 next = 0;
172 if (p) {
173 *p = 0;
174 next = p+1;
175 }
176 arg = strchr(token, '=');
177 if (arg) {
178 *arg = 0;
179 arg++;
180 }
181 #if 0
182 printf("Journal option=%s, argument=%s\n", token,
183 arg ? arg : "NONE");
184 #endif
185 if (strcmp(token, "device") == 0) {
186 journal_device = blkid_get_devname(NULL, arg, NULL);
187 if (!journal_device) {
188 if (arg)
189 fprintf(stderr, _("\nCould not find "
190 "journal device matching %s\n"),
191 arg);
192 journal_usage++;
193 continue;
194 }
195 } else if (strcmp(token, "size") == 0) {
196 if (!arg) {
197 journal_usage++;
198 continue;
199 }
200 journal_size = strtoul(arg, &p, 0);
201 if (*p)
202 journal_usage++;
203 } else if (strcmp(token, "fast_commit_size") == 0) {
204 if (!arg) {
205 journal_usage++;
206 continue;
207 }
208 journal_fc_size = strtoul(arg, &p, 0);
209 if (*p)
210 journal_usage++;
211 } else if (!strcmp(token, "location")) {
212 if (!arg) {
213 journal_usage++;
214 continue;
215 }
216 journal_location_string = strdup(arg);
217 } else if (strcmp(token, "v1_superblock") == 0) {
218 journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
219 continue;
220 } else
221 journal_usage++;
222 }
223 if (journal_usage) {
224 fputs(_("\nBad journal options specified.\n\n"
225 "Journal options are separated by commas, "
226 "and may take an argument which\n"
227 "\tis set off by an equals ('=') sign.\n\n"
228 "Valid journal options are:\n"
229 "\tsize=<journal size in megabytes>\n"
230 "\tdevice=<journal device>\n"
231 "\tlocation=<journal location>\n\n"
232 "The journal size must be between "
233 "1024 and 10240000 filesystem blocks.\n\n"), stderr);
234 free(buf);
235 exit(1);
236 }
237 free(buf);
238 }
239
jsize_to_blks(ext2_filsys fs,int size)240 static inline int jsize_to_blks(ext2_filsys fs, int size)
241 {
242 return (size * 1024) / (fs->blocksize / 1024);
243 }
244
245 /* Fast commit size is in KBs */
fcsize_to_blks(ext2_filsys fs,int size)246 static inline int fcsize_to_blks(ext2_filsys fs, int size)
247 {
248 return (size * 1024) / (fs->blocksize);
249 }
250
251 /*
252 * Determine the number of journal blocks to use, either via
253 * user-specified # of megabytes, or via some intelligently selected
254 * defaults.
255 *
256 * Find a reasonable journal file size (in blocks) given the number of blocks in
257 * the filesystem. For very small filesystems, it is not reasonable to have a
258 * journal that fills more than half of the filesystem.
259 */
figure_journal_size(struct ext2fs_journal_params * jparams,int requested_j_size,int requested_fc_size,ext2_filsys fs)260 void figure_journal_size(struct ext2fs_journal_params *jparams,
261 int requested_j_size, int requested_fc_size, ext2_filsys fs)
262 {
263 int total_blocks, ret;
264
265 ret = ext2fs_get_journal_params(jparams, fs);
266 if (ret) {
267 fputs(_("\nFilesystem too small for a journal\n"), stderr);
268 return;
269 }
270
271 if (requested_j_size > 0 ||
272 (ext2fs_has_feature_fast_commit(fs->super) && requested_fc_size > 0)) {
273 if (requested_j_size > 0)
274 jparams->num_journal_blocks =
275 jsize_to_blks(fs, requested_j_size);
276 if (ext2fs_has_feature_fast_commit(fs->super) &&
277 requested_fc_size > 0)
278 jparams->num_fc_blocks =
279 fcsize_to_blks(fs, requested_fc_size);
280 else if (!ext2fs_has_feature_fast_commit(fs->super))
281 jparams->num_fc_blocks = 0;
282 total_blocks = jparams->num_journal_blocks + jparams->num_fc_blocks;
283 if (total_blocks < 1024 || total_blocks > 10240000) {
284 fprintf(stderr, _("\nThe total requested journal "
285 "size is %d blocks; it must be\n"
286 "between 1024 and 10240000 blocks. "
287 "Aborting.\n"),
288 total_blocks);
289 exit(1);
290 }
291 if ((unsigned int) total_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
292 fputs(_("\nTotal journal size too big for filesystem.\n"),
293 stderr);
294 exit(1);
295 }
296 }
297 }
298
print_check_message(int mnt,unsigned int check)299 void print_check_message(int mnt, unsigned int check)
300 {
301 if (mnt < 0)
302 mnt = 0;
303 if (!mnt && !check)
304 return;
305 printf(_("This filesystem will be automatically "
306 "checked every %d mounts or\n"
307 "%g days, whichever comes first. "
308 "Use tune2fs -c or -i to override.\n"),
309 mnt, ((double) check) / (3600 * 24));
310 }
311
dump_mmp_msg(struct mmp_struct * mmp,const char * msg)312 void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
313 {
314
315 if (msg)
316 printf("MMP check failed: %s\n", msg);
317 if (mmp) {
318 time_t t = mmp->mmp_time;
319
320 printf("MMP error info: node: %.*s, device: %.*s, updated: %s",
321 EXT2_LEN_STR(mmp->mmp_nodename),
322 EXT2_LEN_STR(mmp->mmp_bdevname), ctime(&t));
323 }
324 }
325