e2fsprogs/old_e2fsprogs/util.c

/* vi: set sw=4 ts=4: */
/*
 * util.c --- helper functions used by tune2fs and mke2fs
 *
 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <linux/major.h>
#include <sys/stat.h>

#include "e2fsbb.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "blkid/blkid.h"
#include "util.h"

void proceed_question(void)
{
	fputs("Proceed anyway? (y,n) ", stdout);
	if (bb_ask_confirmation() == 0)
		exit(1);
}

void check_plausibility(const char *device, int force)
{
	int val;
	struct stat s;
	val = stat(device, &s);
	if (force)
		return;
	if (val == -1)
		bb_perror_msg_and_die("cannot stat %s", device);
	if (!S_ISBLK(s.st_mode)) {
		printf("%s is not a block special device.\n", device);
		proceed_question();
		return;
	}

#ifdef HAVE_LINUX_MAJOR_H
#ifndef MAJOR
#define MAJOR(dev)	((dev)>>8)
#define MINOR(dev)	((dev) & 0xff)
#endif
#ifndef SCSI_BLK_MAJOR
#ifdef SCSI_DISK0_MAJOR
#ifdef SCSI_DISK8_MAJOR
#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
  ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
#else
#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
  ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
#endif /* defined(SCSI_DISK8_MAJOR) */
#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
#else
#define SCSI_BLK_MAJOR(M)  ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
#endif /* defined(SCSI_DISK0_MAJOR) */
#endif /* defined(SCSI_BLK_MAJOR) */
	if (((MAJOR(s.st_rdev) == HD_MAJOR &&
	      MINOR(s.st_rdev)%64 == 0) ||
	     (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
	      MINOR(s.st_rdev)%16 == 0))) {
		printf("%s is entire device, not just one partition!\n", device);
		proceed_question();
	}
#endif
}

void check_mount(const char *device, int force, const char *type)
{
	errcode_t retval;
	int mount_flags;

	retval = ext2fs_check_if_mounted(device, &mount_flags);
	if (retval) {
		bb_error_msg("cannot determine if %s is mounted", device);
		return;
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		bb_error_msg("%s is mounted !", device);
force_check:
		if (force)
			bb_error_msg("badblocks forced anyways");
		else
			bb_error_msg_and_die("it's not safe to run badblocks!");
	}

	if (mount_flags & EXT2_MF_BUSY) {
		bb_error_msg("%s is apparently in use by the system", device);
		goto force_check;
	}

}

void parse_journal_opts(char **journal_device, int *journal_flags,
			int *journal_size, const char *opts)
{
	char *buf, *token, *next, *p, *arg;
	int journal_usage = 0;
	buf = xstrdup(opts);
	for (token = buf; token && *token; token = next) {
		p = strchr(token, ',');
		next = 0;
		if (p) {
			*p = 0;
			next = p+1;
		}
		arg = strchr(token, '=');
		if (arg) {
			*arg = 0;
			arg++;
		}
		if (strcmp(token, "device") == 0) {
			*journal_device = blkid_get_devname(NULL, arg, NULL);
			if (!journal_device) {
				journal_usage++;
				continue;
			}
		} else if (strcmp(token, "size") == 0) {
			if (!arg) {
				journal_usage++;
				continue;
			}
			(*journal_size) = strtoul(arg, &p, 0);
			if (*p)
				journal_usage++;
		} else if (strcmp(token, "v1_superblock") == 0) {
			(*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
			continue;
		} else
			journal_usage++;
	}
	if (journal_usage)
		bb_error_msg_and_die(
			"\nBad journal options specified.\n\n"
			"Journal options are separated by commas, "
			"and may take an argument which\n"
			"\tis set off by an equals ('=') sign.\n\n"
			"Valid journal options are:\n"
			"\tsize=<journal size in megabytes>\n"
			"\tdevice=<journal device>\n\n"
			"The journal size must be between "
			"1024 and 102400 filesystem blocks.\n\n");
}

/*
 * Determine the number of journal blocks to use, either via
 * user-specified # of megabytes, or via some intelligently selected
 * defaults.
 *
 * Find a reasonable journal file size (in blocks) given the number of blocks
 * in the filesystem.  For very small filesystems, it is not reasonable to
 * have a journal that fills more than half of the filesystem.
 */
int figure_journal_size(int size, ext2_filsys fs)
{
	blk_t j_blocks;

	if (fs->super->s_blocks_count < 2048) {
		bb_error_msg("Filesystem too small for a journal");
		return 0;
	}

	if (size >= 0) {
		j_blocks = size * 1024 / (fs->blocksize	/ 1024);
		if (j_blocks < 1024 || j_blocks > 102400)
			bb_error_msg_and_die("\nThe requested journal "
				"size is %d blocks;\n it must be "
				"between 1024 and 102400 blocks; Aborting",
				j_blocks);
		if (j_blocks > fs->super->s_free_blocks_count)
			bb_error_msg_and_die("Journal size too big for filesystem");
		return j_blocks;
	}

	if (fs->super->s_blocks_count < 32768)
		j_blocks = 1024;
	else if (fs->super->s_blocks_count < 256*1024)
		j_blocks = 4096;
	else if (fs->super->s_blocks_count < 512*1024)
		j_blocks = 8192;
	else if (fs->super->s_blocks_count < 1024*1024)
		j_blocks = 16384;
	else
		j_blocks = 32768;

	return j_blocks;
}

void print_check_message(ext2_filsys fs)
{
	printf("This filesystem will be automatically "
		 "checked every %d mounts or\n"
		 "%g days, whichever comes first.  "
		 "Use tune2fs -c or -i to override.\n",
	       fs->super->s_max_mnt_count,
	       (double)fs->super->s_checkinterval / (3600 * 24));
}

void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
{
	errcode_t	retval;
	ext2_filsys	jfs;
	io_manager	io_ptr;

	check_plausibility(journal_device, force);
	check_mount(journal_device, force, "journal");
	io_ptr = unix_io_manager;
	retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
					EXT2_FLAG_JOURNAL_DEV_OK, 0,
					fs->blocksize, io_ptr, &jfs);
	if (retval)
		bb_error_msg_and_die("cannot journal device %s", journal_device);
	if (!quiet)
		printf("Adding journal to device %s: ", journal_device);
	fflush(stdout);
	retval = ext2fs_add_journal_device(fs, jfs);
	if (retval)
		bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
	if (!quiet)
		puts("done");
	ext2fs_close(jfs);
}

void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
{
	unsigned long journal_blocks;
	errcode_t	retval;

	journal_blocks = figure_journal_size(journal_size, fs);
	if (!journal_blocks) {
		fs->super->s_feature_compat &=
			~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
		return;
	}
	if (!quiet)
		printf("Creating journal (%ld blocks): ", journal_blocks);
	fflush(stdout);
	retval = ext2fs_add_journal_inode(fs, journal_blocks,
						  journal_flags);
	if (retval)
		bb_error_msg_and_die("cannot create journal");
	if (!quiet)
		puts("done");
}

char *e2fs_set_sbin_path(void)
{
	char *oldpath = getenv("PATH");
	/* Update our PATH to include /sbin  */
#define PATH_SET "/sbin"
	if (oldpath)
		oldpath = xasprintf("%s:%s", PATH_SET, oldpath);
	 else
		oldpath = PATH_SET;
	putenv(oldpath);
	return oldpath;
}
1	niro	532	/* 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
26			void proceed_question(void)
27			{
28			fputs("Proceed anyway? (y,n) ", stdout);
29			if (bb_ask_confirmation() == 0)
30			exit(1);
31			}
32
33			void 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	niro	816	if (val == -1)
41	niro	532	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
78			void 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);
90			force_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
104			void 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			*/
164			int 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
199			void 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
209			void 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	niro	816	if (!quiet)
224	niro	532	printf("Adding journal to device %s: ", journal_device);
225			fflush(stdout);
226			retval = ext2fs_add_journal_device(fs, jfs);
227	niro	816	if (retval)
228	niro	532	bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
229	niro	816	if (!quiet)
230	niro	532	puts("done");
231			ext2fs_close(jfs);
232			}
233
234			void 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	niro	816	if (!quiet)
246	niro	532	printf("Creating journal (%ld blocks): ", journal_blocks);
247			fflush(stdout);
248			retval = ext2fs_add_journal_inode(fs, journal_blocks,
249			journal_flags);
250	niro	816	if (retval)
251	niro	532	bb_error_msg_and_die("cannot create journal");
252	niro	816	if (!quiet)
253	niro	532	puts("done");
254			}
255
256			char *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	niro	816	putenv(oldpath);
266	niro	532	return oldpath;
267			}