source: MondoRescue/branches/2.2.5/mindi-busybox/e2fsprogs/old_e2fsprogs/util.c@ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago

Update to busybox 1.7.2
  • Property svn:eol-style set to native
File size: 6.8 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * util.c --- helper functions used by tune2fs and mke2fs
4 *
5 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 * %End-Header%
11 */
12
13#include <stdio.h>
14#include <string.h>
15#include <errno.h>
16#include <linux/major.h>
17#include <sys/stat.h>
18
19#include "e2fsbb.h"
20#include "e2p/e2p.h"
21#include "ext2fs/ext2_fs.h"
22#include "ext2fs/ext2fs.h"
23#include "blkid/blkid.h"
24#include "util.h"
25
26void proceed_question(void)
27{
28 fputs("Proceed anyway? (y,n) ", stdout);
29 if (bb_ask_confirmation() == 0)
30 exit(1);
31}
32
33void check_plausibility(const char *device, int force)
34{
35 int val;
36 struct stat s;
37 val = stat(device, &s);
38 if (force)
39 return;
40 if(val == -1)
41 bb_perror_msg_and_die("cannot stat %s", device);
42 if (!S_ISBLK(s.st_mode)) {
43 printf("%s is not a block special device.\n", device);
44 proceed_question();
45 return;
46 }
47
48#ifdef HAVE_LINUX_MAJOR_H
49#ifndef MAJOR
50#define MAJOR(dev) ((dev)>>8)
51#define MINOR(dev) ((dev) & 0xff)
52#endif
53#ifndef SCSI_BLK_MAJOR
54#ifdef SCSI_DISK0_MAJOR
55#ifdef SCSI_DISK8_MAJOR
56#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
57 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
58 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
59#else
60#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
61 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
62#endif /* defined(SCSI_DISK8_MAJOR) */
63#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
64#else
65#define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
66#endif /* defined(SCSI_DISK0_MAJOR) */
67#endif /* defined(SCSI_BLK_MAJOR) */
68 if (((MAJOR(s.st_rdev) == HD_MAJOR &&
69 MINOR(s.st_rdev)%64 == 0) ||
70 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
71 MINOR(s.st_rdev)%16 == 0))) {
72 printf("%s is entire device, not just one partition!\n", device);
73 proceed_question();
74 }
75#endif
76}
77
78void check_mount(const char *device, int force, const char *type)
79{
80 errcode_t retval;
81 int mount_flags;
82
83 retval = ext2fs_check_if_mounted(device, &mount_flags);
84 if (retval) {
85 bb_error_msg("cannot determine if %s is mounted", device);
86 return;
87 }
88 if (mount_flags & EXT2_MF_MOUNTED) {
89 bb_error_msg("%s is mounted !", device);
90force_check:
91 if (force)
92 bb_error_msg("badblocks forced anyways");
93 else
94 bb_error_msg_and_die("it's not safe to run badblocks!");
95 }
96
97 if (mount_flags & EXT2_MF_BUSY) {
98 bb_error_msg("%s is apparently in use by the system", device);
99 goto force_check;
100 }
101
102}
103
104void parse_journal_opts(char **journal_device, int *journal_flags,
105 int *journal_size, const char *opts)
106{
107 char *buf, *token, *next, *p, *arg;
108 int journal_usage = 0;
109 buf = xstrdup(opts);
110 for (token = buf; token && *token; token = next) {
111 p = strchr(token, ',');
112 next = 0;
113 if (p) {
114 *p = 0;
115 next = p+1;
116 }
117 arg = strchr(token, '=');
118 if (arg) {
119 *arg = 0;
120 arg++;
121 }
122 if (strcmp(token, "device") == 0) {
123 *journal_device = blkid_get_devname(NULL, arg, NULL);
124 if (!journal_device) {
125 journal_usage++;
126 continue;
127 }
128 } else if (strcmp(token, "size") == 0) {
129 if (!arg) {
130 journal_usage++;
131 continue;
132 }
133 (*journal_size) = strtoul(arg, &p, 0);
134 if (*p)
135 journal_usage++;
136 } else if (strcmp(token, "v1_superblock") == 0) {
137 (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
138 continue;
139 } else
140 journal_usage++;
141 }
142 if (journal_usage)
143 bb_error_msg_and_die(
144 "\nBad journal options specified.\n\n"
145 "Journal options are separated by commas, "
146 "and may take an argument which\n"
147 "\tis set off by an equals ('=') sign.\n\n"
148 "Valid journal options are:\n"
149 "\tsize=<journal size in megabytes>\n"
150 "\tdevice=<journal device>\n\n"
151 "The journal size must be between "
152 "1024 and 102400 filesystem blocks.\n\n");
153}
154
155/*
156 * Determine the number of journal blocks to use, either via
157 * user-specified # of megabytes, or via some intelligently selected
158 * defaults.
159 *
160 * Find a reasonable journal file size (in blocks) given the number of blocks
161 * in the filesystem. For very small filesystems, it is not reasonable to
162 * have a journal that fills more than half of the filesystem.
163 */
164int figure_journal_size(int size, ext2_filsys fs)
165{
166 blk_t j_blocks;
167
168 if (fs->super->s_blocks_count < 2048) {
169 bb_error_msg("Filesystem too small for a journal");
170 return 0;
171 }
172
173 if (size >= 0) {
174 j_blocks = size * 1024 / (fs->blocksize / 1024);
175 if (j_blocks < 1024 || j_blocks > 102400)
176 bb_error_msg_and_die("\nThe requested journal "
177 "size is %d blocks;\n it must be "
178 "between 1024 and 102400 blocks; Aborting",
179 j_blocks);
180 if (j_blocks > fs->super->s_free_blocks_count)
181 bb_error_msg_and_die("Journal size too big for filesystem");
182 return j_blocks;
183 }
184
185 if (fs->super->s_blocks_count < 32768)
186 j_blocks = 1024;
187 else if (fs->super->s_blocks_count < 256*1024)
188 j_blocks = 4096;
189 else if (fs->super->s_blocks_count < 512*1024)
190 j_blocks = 8192;
191 else if (fs->super->s_blocks_count < 1024*1024)
192 j_blocks = 16384;
193 else
194 j_blocks = 32768;
195
196 return j_blocks;
197}
198
199void print_check_message(ext2_filsys fs)
200{
201 printf("This filesystem will be automatically "
202 "checked every %d mounts or\n"
203 "%g days, whichever comes first. "
204 "Use tune2fs -c or -i to override.\n",
205 fs->super->s_max_mnt_count,
206 (double)fs->super->s_checkinterval / (3600 * 24));
207}
208
209void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
210{
211 errcode_t retval;
212 ext2_filsys jfs;
213 io_manager io_ptr;
214
215 check_plausibility(journal_device, force);
216 check_mount(journal_device, force, "journal");
217 io_ptr = unix_io_manager;
218 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
219 EXT2_FLAG_JOURNAL_DEV_OK, 0,
220 fs->blocksize, io_ptr, &jfs);
221 if (retval)
222 bb_error_msg_and_die("cannot journal device %s", journal_device);
223 if(!quiet)
224 printf("Adding journal to device %s: ", journal_device);
225 fflush(stdout);
226 retval = ext2fs_add_journal_device(fs, jfs);
227 if(retval)
228 bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
229 if(!quiet)
230 puts("done");
231 ext2fs_close(jfs);
232}
233
234void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
235{
236 unsigned long journal_blocks;
237 errcode_t retval;
238
239 journal_blocks = figure_journal_size(journal_size, fs);
240 if (!journal_blocks) {
241 fs->super->s_feature_compat &=
242 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
243 return;
244 }
245 if(!quiet)
246 printf("Creating journal (%ld blocks): ", journal_blocks);
247 fflush(stdout);
248 retval = ext2fs_add_journal_inode(fs, journal_blocks,
249 journal_flags);
250 if(retval)
251 bb_error_msg_and_die("cannot create journal");
252 if(!quiet)
253 puts("done");
254}
255
256char *e2fs_set_sbin_path(void)
257{
258 char *oldpath = getenv("PATH");
259 /* Update our PATH to include /sbin */
260#define PATH_SET "/sbin"
261 if (oldpath)
262 oldpath = xasprintf("%s:%s", PATH_SET, oldpath);
263 else
264 oldpath = PATH_SET;
265 putenv (oldpath);
266 return oldpath;
267}
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