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	/* 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	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
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	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
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	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
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	putenv(oldpath);
266	return oldpath;
267	}