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 #define _LARGEFILE_SOURCE
13 #define _LARGEFILE64_SOURCE
14
15 #include <stdio.h>
16 #include <string.h>
17 #ifdef HAVE_ERRNO_H
18 #include <errno.h>
19 #endif
20 #ifdef HAVE_LINUX_MAJOR_H
21 #include <linux/major.h>
22 #endif
23 #ifdef HAVE_SYS_STAT_H
24 #include <sys/stat.h>
25 #endif
26
27 #include "et/com_err.h"
28 #include "e2p/e2p.h"
29 #include "ext2fs/ext2_fs.h"
30 #include "ext2fs/ext2fs.h"
31 #include "nls-enable.h"
32 #include "blkid/blkid.h"
33 #include "util.h"
34
35 #ifndef HAVE_STRCASECMP
strcasecmp(char * s1,char * s2)36 int strcasecmp (char *s1, char *s2)
37 {
38 while (*s1 && *s2) {
39 int ch1 = *s1++, ch2 = *s2++;
40 if (isupper (ch1))
41 ch1 = tolower (ch1);
42 if (isupper (ch2))
43 ch2 = tolower (ch2);
44 if (ch1 != ch2)
45 return ch1 - ch2;
46 }
47 return *s1 ? 1 : *s2 ? -1 : 0;
48 }
49 #endif
50
51 /*
52 * Given argv[0], return the program name.
53 */
get_progname(char * argv_zero)54 char *get_progname(char *argv_zero)
55 {
56 char *cp;
57
58 cp = strrchr(argv_zero, '/');
59 if (!cp )
60 return argv_zero;
61 else
62 return cp+1;
63 }
64
proceed_question(void)65 void proceed_question(void)
66 {
67 char buf[256];
68 const char *short_yes = _("yY");
69
70 fflush(stdout);
71 fflush(stderr);
72 fputs(_("Proceed anyway? (y,n) "), stdout);
73 buf[0] = 0;
74 if (!fgets(buf, sizeof(buf), stdin) ||
75 strchr(short_yes, buf[0]) == 0)
76 exit(1);
77 }
78
check_plausibility(const char * device)79 void check_plausibility(const char *device)
80 {
81 int val;
82 #ifdef HAVE_OPEN64
83 struct stat64 s;
84
85 val = stat64(device, &s);
86 #else
87 struct stat s;
88
89 val = stat(device, &s);
90 #endif
91
92 if(val == -1) {
93 fprintf(stderr, _("Could not stat %s --- %s\n"),
94 device, error_message(errno));
95 if (errno == ENOENT)
96 fputs(_("\nThe device apparently does not exist; "
97 "did you specify it correctly?\n"), stderr);
98 exit(1);
99 }
100 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
101 /* On FreeBSD, all disk devices are character specials */
102 if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode))
103 #else
104 if (!S_ISBLK(s.st_mode))
105 #endif
106 {
107 printf(_("%s is not a block special device.\n"), device);
108 proceed_question();
109 return;
110 }
111
112 #ifdef HAVE_LINUX_MAJOR_H
113 #ifndef MAJOR
114 #define MAJOR(dev) ((dev)>>8)
115 #define MINOR(dev) ((dev) & 0xff)
116 #endif
117 #ifndef SCSI_BLK_MAJOR
118 #ifdef SCSI_DISK0_MAJOR
119 #ifdef SCSI_DISK8_MAJOR
120 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
121 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
122 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
123 #else
124 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
125 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
126 #endif /* defined(SCSI_DISK8_MAJOR) */
127 #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
128 #else
129 #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
130 #endif /* defined(SCSI_DISK0_MAJOR) */
131 #endif /* defined(SCSI_BLK_MAJOR) */
132 if (((MAJOR(s.st_rdev) == HD_MAJOR &&
133 MINOR(s.st_rdev)%64 == 0) ||
134 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
135 MINOR(s.st_rdev)%16 == 0))) {
136 printf(_("%s is entire device, not just one partition!\n"),
137 device);
138 proceed_question();
139 }
140 #endif
141 }
142
check_mount(const char * device,int force,const char * type)143 void check_mount(const char *device, int force, const char *type)
144 {
145 errcode_t retval;
146 int mount_flags;
147
148 retval = ext2fs_check_if_mounted(device, &mount_flags);
149 if (retval) {
150 com_err("ext2fs_check_if_mount", retval,
151 _("while determining whether %s is mounted."),
152 device);
153 return;
154 }
155 if (mount_flags & EXT2_MF_MOUNTED) {
156 fprintf(stderr, _("%s is mounted; "), device);
157 if (force > 2) {
158 fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
159 "incorrect.\n"), stderr);
160 return;
161 }
162 abort_mke2fs:
163 fprintf(stderr, _("will not make a %s here!\n"), type);
164 exit(1);
165 }
166 if (mount_flags & EXT2_MF_BUSY) {
167 fprintf(stderr, _("%s is apparently in use by the system; "),
168 device);
169 if (force > 2) {
170 fputs(_("mke2fs forced anyway.\n"), stderr);
171 return;
172 }
173 goto abort_mke2fs;
174 }
175 }
176
parse_journal_opts(const char * opts)177 void parse_journal_opts(const char *opts)
178 {
179 char *buf, *token, *next, *p, *arg;
180 int len;
181 int journal_usage = 0;
182
183 len = strlen(opts);
184 buf = malloc(len+1);
185 if (!buf) {
186 fputs(_("Couldn't allocate memory to parse journal "
187 "options!\n"), stderr);
188 exit(1);
189 }
190 strcpy(buf, opts);
191 for (token = buf; token && *token; token = next) {
192 p = strchr(token, ',');
193 next = 0;
194 if (p) {
195 *p = 0;
196 next = p+1;
197 }
198 arg = strchr(token, '=');
199 if (arg) {
200 *arg = 0;
201 arg++;
202 }
203 #if 0
204 printf("Journal option=%s, argument=%s\n", token,
205 arg ? arg : "NONE");
206 #endif
207 if (strcmp(token, "device") == 0) {
208 journal_device = blkid_get_devname(NULL, arg, NULL);
209 if (!journal_device) {
210 if (arg)
211 fprintf(stderr, _("\nCould not find "
212 "journal device matching %s\n"),
213 arg);
214 journal_usage++;
215 continue;
216 }
217 } else if (strcmp(token, "size") == 0) {
218 if (!arg) {
219 journal_usage++;
220 continue;
221 }
222 journal_size = strtoul(arg, &p, 0);
223 if (*p)
224 journal_usage++;
225 } else if (strcmp(token, "v1_superblock") == 0) {
226 journal_flags |= EXT2_MKJOURNAL_V1_SUPER;
227 continue;
228 } else
229 journal_usage++;
230 }
231 if (journal_usage) {
232 fputs(_("\nBad journal options specified.\n\n"
233 "Journal options are separated by commas, "
234 "and may take an argument which\n"
235 "\tis set off by an equals ('=') sign.\n\n"
236 "Valid journal options are:\n"
237 "\tsize=<journal size in megabytes>\n"
238 "\tdevice=<journal device>\n\n"
239 "The journal size must be between "
240 "1024 and 10240000 filesystem blocks.\n\n"), stderr);
241 free(buf);
242 exit(1);
243 }
244 free(buf);
245 }
246
247 /*
248 * Determine the number of journal blocks to use, either via
249 * user-specified # of megabytes, or via some intelligently selected
250 * defaults.
251 *
252 * Find a reasonable journal file size (in blocks) given the number of blocks
253 * in the filesystem. For very small filesystems, it is not reasonable to
254 * have a journal that fills more than half of the filesystem.
255 */
figure_journal_size(int size,ext2_filsys fs)256 unsigned int figure_journal_size(int size, ext2_filsys fs)
257 {
258 int j_blocks;
259
260 j_blocks = ext2fs_default_journal_size(fs->super->s_blocks_count);
261 if (j_blocks < 0) {
262 fputs(_("\nFilesystem too small for a journal\n"), stderr);
263 return 0;
264 }
265
266 if (size > 0) {
267 j_blocks = size * 1024 / (fs->blocksize / 1024);
268 if (j_blocks < 1024 || j_blocks > 10240000) {
269 fprintf(stderr, _("\nThe requested journal "
270 "size is %d blocks; it must be\n"
271 "between 1024 and 10240000 blocks. "
272 "Aborting.\n"),
273 j_blocks);
274 exit(1);
275 }
276 if ((unsigned) j_blocks > fs->super->s_free_blocks_count / 2) {
277 fputs(_("\nJournal size too big for filesystem.\n"),
278 stderr);
279 exit(1);
280 }
281 }
282 return j_blocks;
283 }
284
print_check_message(ext2_filsys fs)285 void print_check_message(ext2_filsys fs)
286 {
287 printf(_("This filesystem will be automatically "
288 "checked every %d mounts or\n"
289 "%g days, whichever comes first. "
290 "Use tune2fs -c or -i to override.\n"),
291 fs->super->s_max_mnt_count,
292 (double)fs->super->s_checkinterval / (3600 * 24));
293 }
294