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.
 *
 * Licensed under GPLv2, see file LICENSE in this tarball for details.
 */

#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("can't 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("can't 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("can't 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("can't 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	niro	984	* Licensed under GPLv2, see file LICENSE in this tarball for details.
8	niro	532	*/
9
10			#include <stdio.h>
11			#include <string.h>
12			#include <errno.h>
13			#include <linux/major.h>
14			#include <sys/stat.h>
15
16			#include "e2fsbb.h"
17			#include "e2p/e2p.h"
18			#include "ext2fs/ext2_fs.h"
19			#include "ext2fs/ext2fs.h"
20			#include "blkid/blkid.h"
21			#include "util.h"
22
23			void proceed_question(void)
24			{
25			fputs("Proceed anyway? (y,n) ", stdout);
26			if (bb_ask_confirmation() == 0)
27			exit(1);
28			}
29
30			void check_plausibility(const char *device, int force)
31			{
32			int val;
33			struct stat s;
34			val = stat(device, &s);
35			if (force)
36			return;
37	niro	816	if (val == -1)
38	niro	984	bb_perror_msg_and_die("can't stat %s", device);
39	niro	532	if (!S_ISBLK(s.st_mode)) {
40			printf("%s is not a block special device.\n", device);
41			proceed_question();
42			return;
43			}
44
45			#ifdef HAVE_LINUX_MAJOR_H
46			#ifndef MAJOR
47			#define MAJOR(dev) ((dev)>>8)
48			#define MINOR(dev) ((dev) & 0xff)
49			#endif
50			#ifndef SCSI_BLK_MAJOR
51			#ifdef SCSI_DISK0_MAJOR
52			#ifdef SCSI_DISK8_MAJOR
53			#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR \|\| \
54			((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) \|\| \
55			((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
56			#else
57			#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR \|\| \
58			((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
59			#endif /* defined(SCSI_DISK8_MAJOR) */
60			#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) \|\| (M) == SCSI_CDROM_MAJOR)
61			#else
62			#define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR \|\| (M) == SCSI_CDROM_MAJOR)
63			#endif /* defined(SCSI_DISK0_MAJOR) */
64			#endif /* defined(SCSI_BLK_MAJOR) */
65			if (((MAJOR(s.st_rdev) == HD_MAJOR &&
66			MINOR(s.st_rdev)%64 == 0) \|\|
67			(SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
68			MINOR(s.st_rdev)%16 == 0))) {
69			printf("%s is entire device, not just one partition!\n", device);
70			proceed_question();
71			}
72			#endif
73			}
74
75			void check_mount(const char device, int force, const char type)
76			{
77			errcode_t retval;
78			int mount_flags;
79
80			retval = ext2fs_check_if_mounted(device, &mount_flags);
81			if (retval) {
82	niro	984	bb_error_msg("can't determine if %s is mounted", device);
83	niro	532	return;
84			}
85			if (mount_flags & EXT2_MF_MOUNTED) {
86			bb_error_msg("%s is mounted !", device);
87			force_check:
88			if (force)
89			bb_error_msg("badblocks forced anyways");
90			else
91			bb_error_msg_and_die("it's not safe to run badblocks!");
92			}
93
94			if (mount_flags & EXT2_MF_BUSY) {
95			bb_error_msg("%s is apparently in use by the system", device);
96			goto force_check;
97			}
98
99			}
100
101			void parse_journal_opts(char *journal_device, int journal_flags,
102			int journal_size, const char opts)
103			{
104			char buf, token, next, p, *arg;
105			int journal_usage = 0;
106			buf = xstrdup(opts);
107			for (token = buf; token && *token; token = next) {
108			p = strchr(token, ',');
109			next = 0;
110			if (p) {
111			*p = 0;
112			next = p+1;
113			}
114			arg = strchr(token, '=');
115			if (arg) {
116			*arg = 0;
117			arg++;
118			}
119			if (strcmp(token, "device") == 0) {
120			*journal_device = blkid_get_devname(NULL, arg, NULL);
121			if (!journal_device) {
122			journal_usage++;
123			continue;
124			}
125			} else if (strcmp(token, "size") == 0) {
126			if (!arg) {
127			journal_usage++;
128			continue;
129			}
130			(*journal_size) = strtoul(arg, &p, 0);
131			if (*p)
132			journal_usage++;
133			} else if (strcmp(token, "v1_superblock") == 0) {
134			(*journal_flags) \|= EXT2_MKJOURNAL_V1_SUPER;
135			continue;
136			} else
137			journal_usage++;
138			}
139			if (journal_usage)
140			bb_error_msg_and_die(
141			"\nBad journal options specified.\n\n"
142			"Journal options are separated by commas, "
143			"and may take an argument which\n"
144			"\tis set off by an equals ('=') sign.\n\n"
145			"Valid journal options are:\n"
146			"\tsize=<journal size in megabytes>\n"
147			"\tdevice=<journal device>\n\n"
148			"The journal size must be between "
149			"1024 and 102400 filesystem blocks.\n\n");
150			}
151
152			/*
153			* Determine the number of journal blocks to use, either via
154			* user-specified # of megabytes, or via some intelligently selected
155			* defaults.
156			*
157			* Find a reasonable journal file size (in blocks) given the number of blocks
158			* in the filesystem. For very small filesystems, it is not reasonable to
159			* have a journal that fills more than half of the filesystem.
160			*/
161			int figure_journal_size(int size, ext2_filsys fs)
162			{
163			blk_t j_blocks;
164
165			if (fs->super->s_blocks_count < 2048) {
166			bb_error_msg("Filesystem too small for a journal");
167			return 0;
168			}
169
170			if (size >= 0) {
171			j_blocks = size * 1024 / (fs->blocksize / 1024);
172			if (j_blocks < 1024 \|\| j_blocks > 102400)
173			bb_error_msg_and_die("\nThe requested journal "
174			"size is %d blocks;\n it must be "
175			"between 1024 and 102400 blocks; Aborting",
176			j_blocks);
177			if (j_blocks > fs->super->s_free_blocks_count)
178			bb_error_msg_and_die("Journal size too big for filesystem");
179			return j_blocks;
180			}
181
182			if (fs->super->s_blocks_count < 32768)
183			j_blocks = 1024;
184			else if (fs->super->s_blocks_count < 256*1024)
185			j_blocks = 4096;
186			else if (fs->super->s_blocks_count < 512*1024)
187			j_blocks = 8192;
188			else if (fs->super->s_blocks_count < 1024*1024)
189			j_blocks = 16384;
190			else
191			j_blocks = 32768;
192
193			return j_blocks;
194			}
195
196			void print_check_message(ext2_filsys fs)
197			{
198			printf("This filesystem will be automatically "
199			"checked every %d mounts or\n"
200			"%g days, whichever comes first. "
201			"Use tune2fs -c or -i to override.\n",
202			fs->super->s_max_mnt_count,
203			(double)fs->super->s_checkinterval / (3600 * 24));
204			}
205
206			void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
207			{
208			errcode_t retval;
209			ext2_filsys jfs;
210			io_manager io_ptr;
211
212			check_plausibility(journal_device, force);
213			check_mount(journal_device, force, "journal");
214			io_ptr = unix_io_manager;
215			retval = ext2fs_open(journal_device, EXT2_FLAG_RW\|
216			EXT2_FLAG_JOURNAL_DEV_OK, 0,
217			fs->blocksize, io_ptr, &jfs);
218			if (retval)
219	niro	984	bb_error_msg_and_die("can't journal device %s", journal_device);
220	niro	816	if (!quiet)
221	niro	532	printf("Adding journal to device %s: ", journal_device);
222			fflush(stdout);
223			retval = ext2fs_add_journal_device(fs, jfs);
224	niro	816	if (retval)
225	niro	532	bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
226	niro	816	if (!quiet)
227	niro	532	puts("done");
228			ext2fs_close(jfs);
229			}
230
231			void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
232			{
233			unsigned long journal_blocks;
234			errcode_t retval;
235
236			journal_blocks = figure_journal_size(journal_size, fs);
237			if (!journal_blocks) {
238			fs->super->s_feature_compat &=
239			~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
240			return;
241			}
242	niro	816	if (!quiet)
243	niro	532	printf("Creating journal (%ld blocks): ", journal_blocks);
244			fflush(stdout);
245			retval = ext2fs_add_journal_inode(fs, journal_blocks,
246			journal_flags);
247	niro	816	if (retval)
248	niro	984	bb_error_msg_and_die("can't create journal");
249	niro	816	if (!quiet)
250	niro	532	puts("done");
251			}
252
253			char *e2fs_set_sbin_path(void)
254			{
255			char *oldpath = getenv("PATH");
256			/* Update our PATH to include /sbin */
257			#define PATH_SET "/sbin"
258			if (oldpath)
259			oldpath = xasprintf("%s:%s", PATH_SET, oldpath);
260			else
261			oldpath = PATH_SET;
262	niro	816	putenv(oldpath);
263	niro	532	return oldpath;
264			}