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 #ifdef _WIN32
20 #define _POSIX
21 #define __USE_MINGW_ALARM
22 #endif
23
24 #include "config.h"
25 #include <fcntl.h>
26 #include <setjmp.h>
27 #include <signal.h>
28 #include <stdio.h>
29 #include <string.h>
30 #ifdef HAVE_ERRNO_H
31 #include <errno.h>
32 #endif
33 #if HAVE_UNISTD_H
34 #include <unistd.h>
35 #endif
36 #ifdef HAVE_LINUX_MAJOR_H
37 #include <linux/major.h>
38 #endif
39 #include <sys/types.h>
40 #ifdef HAVE_SYS_STAT_H
41 #include <sys/stat.h>
42 #endif
43 #ifdef HAVE_UNISTD_H
44 #include <unistd.h>
45 #endif
46 #include <time.h>
47
48 #include "et/com_err.h"
49 #include "e2p/e2p.h"
50 #include "ext2fs/ext2_fs.h"
51 #include "ext2fs/ext2fs.h"
52 #include "support/nls-enable.h"
53 #include "support/devname.h"
54 #include "blkid/blkid.h"
55 #include "util.h"
56
57 char *journal_location_string = NULL;
58
59 #ifndef HAVE_STRCASECMP
strcasecmp(char * s1,char * s2)60 int strcasecmp (char *s1, char *s2)
61 {
62 while (*s1 && *s2) {
63 int ch1 = *s1++, ch2 = *s2++;
64 if (isupper (ch1))
65 ch1 = tolower (ch1);
66 if (isupper (ch2))
67 ch2 = tolower (ch2);
68 if (ch1 != ch2)
69 return ch1 - ch2;
70 }
71 return *s1 ? 1 : *s2 ? -1 : 0;
72 }
73 #endif
74
75 /*
76 * Given argv[0], return the program name.
77 */
get_progname(char * argv_zero)78 char *get_progname(char *argv_zero)
79 {
80 char *cp;
81
82 cp = strrchr(argv_zero, '/');
83 if (!cp )
84 return argv_zero;
85 else
86 return cp+1;
87 }
88
89 static jmp_buf alarm_env;
90
alarm_signal(int signal EXT2FS_ATTR ((unused)))91 static void alarm_signal(int signal EXT2FS_ATTR((unused)))
92 {
93 longjmp(alarm_env, 1);
94 }
95
proceed_question(int delay)96 void proceed_question(int delay)
97 {
98 char buf[256];
99 const char *short_yes = _("yY");
100 const char *english_yes = "yY";
101
102 fflush(stdout);
103 fflush(stderr);
104 if (delay > 0) {
105 if (setjmp(alarm_env)) {
106 signal(SIGALRM, SIG_IGN);
107 printf("%s", _("<proceeding>\n"));
108 return;
109 }
110 signal(SIGALRM, alarm_signal);
111 printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
112 delay);
113 alarm(delay);
114 } else
115 fputs(_("Proceed anyway? (y,N) "), stdout);
116 buf[0] = 0;
117 if (!fgets(buf, sizeof(buf), stdin) ||
118 strchr(_("nN"), buf[0]) ||
119 !(strchr(short_yes, buf[0]) ||
120 strchr(english_yes, buf[0]))) {
121 putc('\n', stdout);
122 exit(1);
123 }
124 signal(SIGALRM, SIG_IGN);
125 }
126
check_mount(const char * device,int force,const char * type)127 void check_mount(const char *device, int force, const char *type)
128 {
129 errcode_t retval;
130 int mount_flags;
131
132 retval = ext2fs_check_if_mounted(device, &mount_flags);
133 if (retval) {
134 com_err("ext2fs_check_if_mount", retval,
135 _("while determining whether %s is mounted."),
136 device);
137 return;
138 }
139 if (mount_flags & EXT2_MF_MOUNTED) {
140 fprintf(stderr, _("%s is mounted; "), device);
141 if (force >= 2) {
142 fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
143 "incorrect.\n"), stderr);
144 return;
145 }
146 abort_mke2fs:
147 fprintf(stderr, _("will not make a %s here!\n"), type);
148 exit(1);
149 }
150 if (mount_flags & EXT2_MF_BUSY) {
151 fprintf(stderr, _("%s is apparently in use by the system; "),
152 device);
153 if (force >= 2) {
154 fputs(_("mke2fs forced anyway.\n"), stderr);
155 return;
156 }
157 goto abort_mke2fs;
158 }
159 }
160
parse_journal_opts(const char * opts)161 void parse_journal_opts(const char *opts)
162 {
163 char *buf, *token, *next, *p, *arg;
164 int len;
165 int journal_usage = 0;
166
167 len = strlen(opts);
168 buf = malloc(len+1);
169 if (!buf) {
170 fputs(_("Couldn't allocate memory to parse journal "
171 "options!\n"), stderr);
172 exit(1);
173 }
174 strcpy(buf, opts);
175 for (token = buf; token && *token; token = next) {
176 p = strchr(token, ',');
177 next = 0;
178 if (p) {
179 *p = 0;
180 next = p+1;
181 }
182 arg = strchr(token, '=');
183 if (arg) {
184 *arg = 0;
185 arg++;
186 }
187 #if 0
188 printf("Journal option=%s, argument=%s\n", token,
189 arg ? arg : "NONE");
190 #endif
191 if (strcmp(token, "device") == 0) {
192 journal_device = get_devname(NULL, arg, NULL);
193 if (!journal_device) {
194 if (arg)
195 fprintf(stderr, _("\nCould not find "
196 "journal device matching %s\n"),
197 arg);
198 journal_usage++;
199 continue;
200 }
201 } else if (strcmp(token, "size") == 0) {
202 if (!arg) {
203 journal_usage++;
204 continue;
205 }
206 journal_size = strtoul(arg, &p, 0);
207 if (*p)
208 journal_usage++;
209 } else if (strcmp(token, "fast_commit_size") == 0) {
210 if (!arg) {
211 journal_usage++;
212 continue;
213 }
214 journal_fc_size = strtoul(arg, &p, 0);
215 if (*p)
216 journal_usage++;
217 } else if (!strcmp(token, "location")) {
218 if (!arg) {
219 journal_usage++;
220 continue;
221 }
222 journal_location_string = strdup(arg);
223 } else if (strcmp(token, "v1_superblock") == 0) {
224 journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
225 continue;
226 } else
227 journal_usage++;
228 }
229 if (journal_usage) {
230 fputs(_("\nBad journal options specified.\n\n"
231 "Journal options are separated by commas, "
232 "and may take an argument which\n"
233 "\tis set off by an equals ('=') sign.\n\n"
234 "Valid journal options are:\n"
235 "\tsize=<journal size in megabytes>\n"
236 "\tdevice=<journal device>\n"
237 "\tlocation=<journal location>\n\n"
238 "The journal size must be between "
239 "1024 and 10240000 filesystem blocks.\n\n"), stderr);
240 free(buf);
241 exit(1);
242 }
243 free(buf);
244 }
245
jsize_to_blks(ext2_filsys fs,int size)246 static inline int jsize_to_blks(ext2_filsys fs, int size)
247 {
248 return (size * 1024) / (fs->blocksize / 1024);
249 }
250
251 /* Fast commit size is in KBs */
fcsize_to_blks(ext2_filsys fs,int size)252 static inline int fcsize_to_blks(ext2_filsys fs, int size)
253 {
254 return (size * 1024) / (fs->blocksize);
255 }
256
257 /*
258 * Determine the number of journal blocks to use, either via
259 * user-specified # of megabytes, or via some intelligently selected
260 * defaults.
261 *
262 * Find a reasonable journal file size (in blocks) given the number of blocks in
263 * the filesystem. For very small filesystems, it is not reasonable to have a
264 * journal that fills more than half of the filesystem.
265 */
figure_journal_size(struct ext2fs_journal_params * jparams,int requested_j_size,int requested_fc_size,ext2_filsys fs)266 void figure_journal_size(struct ext2fs_journal_params *jparams,
267 int requested_j_size, int requested_fc_size, ext2_filsys fs)
268 {
269 int total_blocks, ret;
270
271 ret = ext2fs_get_journal_params(jparams, fs);
272 if (ret) {
273 fputs(_("\nFilesystem too small for a journal\n"), stderr);
274 return;
275 }
276
277 if (requested_j_size > 0 ||
278 (ext2fs_has_feature_fast_commit(fs->super) && requested_fc_size > 0)) {
279 if (requested_j_size > 0)
280 jparams->num_journal_blocks =
281 jsize_to_blks(fs, requested_j_size);
282 if (ext2fs_has_feature_fast_commit(fs->super) &&
283 requested_fc_size > 0)
284 jparams->num_fc_blocks =
285 fcsize_to_blks(fs, requested_fc_size);
286 else if (!ext2fs_has_feature_fast_commit(fs->super))
287 jparams->num_fc_blocks = 0;
288 total_blocks = jparams->num_journal_blocks + jparams->num_fc_blocks;
289 if (total_blocks < 1024 || total_blocks > 10240000) {
290 fprintf(stderr, _("\nThe total requested journal "
291 "size is %d blocks; it must be\n"
292 "between 1024 and 10240000 blocks. "
293 "Aborting.\n"),
294 total_blocks);
295 exit(1);
296 }
297 if ((unsigned int) total_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
298 fputs(_("\nTotal journal size too big for filesystem.\n"),
299 stderr);
300 exit(1);
301 }
302 }
303 }
304
print_check_message(int mnt,unsigned int check)305 void print_check_message(int mnt, unsigned int check)
306 {
307 if (mnt < 0)
308 mnt = 0;
309 if (!mnt && !check)
310 return;
311 printf(_("This filesystem will be automatically "
312 "checked every %d mounts or\n"
313 "%g days, whichever comes first. "
314 "Use tune2fs -c or -i to override.\n"),
315 mnt, ((double) check) / (3600 * 24));
316 }
317
dump_mmp_msg(struct mmp_struct * mmp,const char * msg)318 void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
319 {
320
321 if (msg)
322 printf("MMP check failed: %s\n", msg);
323 if (mmp) {
324 time_t t = mmp->mmp_time;
325
326 printf("MMP error info: node: %.*s, device: %.*s, updated: %s",
327 EXT2_LEN_STR(mmp->mmp_nodename),
328 EXT2_LEN_STR(mmp->mmp_bdevname), ctime(&t));
329 }
330 }
331