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
95 fflush(stdout);
96 fflush(stderr);
97 if (delay > 0) {
98 if (setjmp(alarm_env)) {
99 signal(SIGALRM, SIG_IGN);
100 printf("%s", _("<proceeding>\n"));
101 return;
102 }
103 signal(SIGALRM, alarm_signal);
104 printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
105 delay);
106 alarm(delay);
107 } else
108 fputs(_("Proceed anyway? (y,N) "), stdout);
109 buf[0] = 0;
110 if (!fgets(buf, sizeof(buf), stdin) ||
111 strchr(short_yes, buf[0]) == 0) {
112 putc('\n', stdout);
113 exit(1);
114 }
115 signal(SIGALRM, SIG_IGN);
116 }
117
check_mount(const char * device,int force,const char * type)118 void check_mount(const char *device, int force, const char *type)
119 {
120 errcode_t retval;
121 int mount_flags;
122
123 retval = ext2fs_check_if_mounted(device, &mount_flags);
124 if (retval) {
125 com_err("ext2fs_check_if_mount", retval,
126 _("while determining whether %s is mounted."),
127 device);
128 return;
129 }
130 if (mount_flags & EXT2_MF_MOUNTED) {
131 fprintf(stderr, _("%s is mounted; "), device);
132 if (force >= 2) {
133 fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
134 "incorrect.\n"), stderr);
135 return;
136 }
137 abort_mke2fs:
138 fprintf(stderr, _("will not make a %s here!\n"), type);
139 exit(1);
140 }
141 if (mount_flags & EXT2_MF_BUSY) {
142 fprintf(stderr, _("%s is apparently in use by the system; "),
143 device);
144 if (force >= 2) {
145 fputs(_("mke2fs forced anyway.\n"), stderr);
146 return;
147 }
148 goto abort_mke2fs;
149 }
150 }
151
parse_journal_opts(const char * opts)152 void parse_journal_opts(const char *opts)
153 {
154 char *buf, *token, *next, *p, *arg;
155 int len;
156 int journal_usage = 0;
157
158 len = strlen(opts);
159 buf = malloc(len+1);
160 if (!buf) {
161 fputs(_("Couldn't allocate memory to parse journal "
162 "options!\n"), stderr);
163 exit(1);
164 }
165 strcpy(buf, opts);
166 for (token = buf; token && *token; token = next) {
167 p = strchr(token, ',');
168 next = 0;
169 if (p) {
170 *p = 0;
171 next = p+1;
172 }
173 arg = strchr(token, '=');
174 if (arg) {
175 *arg = 0;
176 arg++;
177 }
178 #if 0
179 printf("Journal option=%s, argument=%s\n", token,
180 arg ? arg : "NONE");
181 #endif
182 if (strcmp(token, "device") == 0) {
183 journal_device = blkid_get_devname(NULL, arg, NULL);
184 if (!journal_device) {
185 if (arg)
186 fprintf(stderr, _("\nCould not find "
187 "journal device matching %s\n"),
188 arg);
189 journal_usage++;
190 continue;
191 }
192 } else if (strcmp(token, "size") == 0) {
193 if (!arg) {
194 journal_usage++;
195 continue;
196 }
197 journal_size = strtoul(arg, &p, 0);
198 if (*p)
199 journal_usage++;
200 } else if (!strcmp(token, "location")) {
201 if (!arg) {
202 journal_usage++;
203 continue;
204 }
205 journal_location_string = strdup(arg);
206 } else if (strcmp(token, "v1_superblock") == 0) {
207 journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
208 continue;
209 } else
210 journal_usage++;
211 }
212 if (journal_usage) {
213 fputs(_("\nBad journal options specified.\n\n"
214 "Journal options are separated by commas, "
215 "and may take an argument which\n"
216 "\tis set off by an equals ('=') sign.\n\n"
217 "Valid journal options are:\n"
218 "\tsize=<journal size in megabytes>\n"
219 "\tdevice=<journal device>\n"
220 "\tlocation=<journal location>\n\n"
221 "The journal size must be between "
222 "1024 and 10240000 filesystem blocks.\n\n"), stderr);
223 free(buf);
224 exit(1);
225 }
226 free(buf);
227 }
228
229 /*
230 * Determine the number of journal blocks to use, either via
231 * user-specified # of megabytes, or via some intelligently selected
232 * defaults.
233 *
234 * Find a reasonable journal file size (in blocks) given the number of blocks
235 * in the filesystem. For very small filesystems, it is not reasonable to
236 * have a journal that fills more than half of the filesystem.
237 */
figure_journal_size(int size,ext2_filsys fs)238 unsigned int figure_journal_size(int size, ext2_filsys fs)
239 {
240 int j_blocks;
241
242 j_blocks = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
243 if (j_blocks < 0) {
244 fputs(_("\nFilesystem too small for a journal\n"), stderr);
245 return 0;
246 }
247
248 if (size > 0) {
249 j_blocks = size * 1024 / (fs->blocksize / 1024);
250 if (j_blocks < 1024 || j_blocks > 10240000) {
251 fprintf(stderr, _("\nThe requested journal "
252 "size is %d blocks; it must be\n"
253 "between 1024 and 10240000 blocks. "
254 "Aborting.\n"),
255 j_blocks);
256 exit(1);
257 }
258 if ((unsigned) j_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
259 fputs(_("\nJournal size too big for filesystem.\n"),
260 stderr);
261 exit(1);
262 }
263 }
264 return j_blocks;
265 }
266
print_check_message(int mnt,unsigned int check)267 void print_check_message(int mnt, unsigned int check)
268 {
269 if (mnt < 0)
270 mnt = 0;
271 if (!mnt && !check)
272 return;
273 printf(_("This filesystem will be automatically "
274 "checked every %d mounts or\n"
275 "%g days, whichever comes first. "
276 "Use tune2fs -c or -i to override.\n"),
277 mnt, ((double) check) / (3600 * 24));
278 }
279
dump_mmp_msg(struct mmp_struct * mmp,const char * msg)280 void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
281 {
282
283 if (msg)
284 printf("MMP check failed: %s\n", msg);
285 if (mmp) {
286 time_t t = mmp->mmp_time;
287
288 printf("MMP error info: last update: %s node: %s device: %s\n",
289 ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname);
290 }
291 }
292