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	/* 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	* Licensed under GPLv2, see file LICENSE in this tarball for details.
8	*/
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	if (val == -1)
38	bb_perror_msg_and_die("can't stat %s", device);
39	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	bb_error_msg("can't determine if %s is mounted", device);
83	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	bb_error_msg_and_die("can't journal device %s", journal_device);
220	if (!quiet)
221	printf("Adding journal to device %s: ", journal_device);
222	fflush(stdout);
223	retval = ext2fs_add_journal_device(fs, jfs);
224	if (retval)
225	bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
226	if (!quiet)
227	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	if (!quiet)
243	printf("Creating journal (%ld blocks): ", journal_blocks);
244	fflush(stdout);
245	retval = ext2fs_add_journal_inode(fs, journal_blocks,
246	journal_flags);
247	if (retval)
248	bb_error_msg_and_die("can't create journal");
249	if (!quiet)
250	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	putenv(oldpath);
263	return oldpath;
264	}