[thirdparty/e2fsprogs.git] / misc / util.c

/*
 * 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%
 */

#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE

#include <stdio.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_LINUX_MAJOR_H
#include <linux/major.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif

#include "et/com_err.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "nls-enable.h"
#include "blkid/blkid.h"
#include "util.h"

#ifndef HAVE_STRCASECMP
int strcasecmp (char *s1, char *s2)
{
	while (*s1 && *s2) {
		int ch1 = *s1++, ch2 = *s2++;
		if (isupper (ch1))
			ch1 = tolower (ch1);
		if (isupper (ch2))
			ch2 = tolower (ch2);
		if (ch1 != ch2)
			return ch1 - ch2;
	}
	return *s1 ? 1 : *s2 ? -1 : 0;
}
#endif

/*
 * Given argv[0], return the program name.
 */
char *get_progname(char *argv_zero)
{
	char	*cp;

	cp = strrchr(argv_zero, '/');
	if (!cp )
		return argv_zero;
	else
		return cp+1;
}

void proceed_question(void)
{
	char buf[256];
	const char *short_yes = _("yY");

	fflush(stdout);
	fflush(stderr);
	fputs(_("Proceed anyway? (y,n) "), stdout);
	buf[0] = 0;
	fgets(buf, sizeof(buf), stdin);
	if (strchr(short_yes, buf[0]) == 0)
		exit(1);
}

void check_plausibility(const char *device)
{
	int val;
#ifdef HAVE_OPEN64
	struct stat64 s;
	
	val = stat64(device, &s);
#else
	struct stat s;
	
	val = stat(device, &s);
#endif
	
	if(val == -1) {
		fprintf(stderr, _("Could not stat %s --- %s\n"),
			device, error_message(errno));
		if (errno == ENOENT)
			fputs(_("\nThe device apparently does not exist; "
				"did you specify it correctly?\n"), stderr);
		exit(1);
	}
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
	/* On FreeBSD, all disk devices are character specials */
	if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode))
#else
	if (!S_ISBLK(s.st_mode))
#endif
	{
		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) {
		com_err("ext2fs_check_if_mount", retval,
			_("while determining whether %s is mounted."),
			device);
		return;
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		fprintf(stderr, _("%s is mounted; "), device);
		if (force) {
			fputs(_("mke2fs forced anyway.  Hope /etc/mtab is "
				"incorrect.\n"), stderr);
			return;
		}
	abort_mke2fs:
		fprintf(stderr, _("will not make a %s here!\n"), type);
		exit(1);
	}
	if (mount_flags & EXT2_MF_BUSY) {
		fprintf(stderr, _("%s is apparently in use by the system; "),
			device);
		if (force) {
			fputs(_("mke2fs forced anyway.\n"), stderr);
			return;
		}
		goto abort_mke2fs;
	}
}

void parse_journal_opts(const char *opts)
{
	char	*buf, *token, *next, *p, *arg;
	int	len;
	int	journal_usage = 0;

	len = strlen(opts);
	buf = malloc(len+1);
	if (!buf) {
		fputs(_("Couldn't allocate memory to parse journal "
			"options!\n"), stderr);
		exit(1);
	}
	strcpy(buf, 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 0
		printf("Journal option=%s, argument=%s\n", token,
		       arg ? arg : "NONE");
#endif
		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) {
		fputs(_("\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"), stderr);
		exit(1);
	}
}	

/*
 * 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) {
		fputs(_("\nFilesystem too small for a journal\n"), stderr);
		return 0;
	}
	
	if (size >= 0) {
		j_blocks = size * 1024 / (fs->blocksize	/ 1024);
		if (j_blocks < 1024 || j_blocks > 102400) {
			fprintf(stderr, _("\nThe requested journal "
				"size is %d blocks; it must be\n"
				"between 1024 and 102400 blocks.  "
				"Aborting.\n"),
				j_blocks);
			exit(1);
		}
		if (j_blocks > fs->super->s_free_blocks_count) {
			fputs(_("\nJournal size too big for filesystem.\n"),
			      stderr);
			exit(1);
		}
		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));
}
Commit	Line	Data
63985320 TT	1	/*
	2	* util.c --- helper functions used by tune2fs and mke2fs
	3	*
	4	* Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
	5	*
	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the GNU Public
	8	* License.
	9	* %End-Header%
	10	*/
	11
6ef3920a TT	12	#define _LARGEFILE_SOURCE
	13	#define _LARGEFILE64_SOURCE
	14
63985320 TT	15	#include <stdio.h>
	16	#include <string.h>
	17	#ifdef HAVE_ERRNO_H
	18	#include <errno.h>
	19	#endif
63985320 TT	20	#ifdef HAVE_LINUX_MAJOR_H
63985320 TT	21	#include <linux/major.h>
d71a495d TT	22	#endif
d71a495d TT	23	#ifdef HAVE_SYS_STAT_H
63985320 TT	24	#include <sys/stat.h>
	25	#endif
	26
	27	#include "et/com_err.h"
	28	#include "e2p/e2p.h"
54c637d4	29	#include "ext2fs/ext2_fs.h"
63985320 TT	30	#include "ext2fs/ext2fs.h"
63985320 TT	31	#include "nls-enable.h"
ed1b33e8	32	#include "blkid/blkid.h"
63985320 TT	33	#include "util.h"
	34
	35	#ifndef HAVE_STRCASECMP
	36	int strcasecmp (char s1, char s2)
	37	{
	38	while (s1 && s2) {
	39	int ch1 = s1++, ch2 = s2++;
	40	if (isupper (ch1))
	41	ch1 = tolower (ch1);
	42	if (isupper (ch2))
	43	ch2 = tolower (ch2);
	44	if (ch1 != ch2)
	45	return ch1 - ch2;
	46	}
	47	return s1 ? 1 : s2 ? -1 : 0;
	48	}
	49	#endif
	50
0072f8de AD	51	/*
	52	* Given argv[0], return the program name.
	53	*/
	54	char get_progname(char argv_zero)
	55	{
	56	char *cp;
	57
	58	cp = strrchr(argv_zero, '/');
	59	if (!cp )
	60	return argv_zero;
	61	else
	62	return cp+1;
	63	}
	64
63985320 TT	65	void proceed_question(void)
	66	{
	67	char buf[256];
c8c071a0	68	const char *short_yes = _("yY");
63985320 TT	69
	70	fflush(stdout);
	71	fflush(stderr);
54434927	72	fputs(_("Proceed anyway? (y,n) "), stdout);
63985320 TT	73	buf[0] = 0;
	74	fgets(buf, sizeof(buf), stdin);
	75	if (strchr(short_yes, buf[0]) == 0)
	76	exit(1);
	77	}
	78
	79	void check_plausibility(const char *device)
	80	{
	81	int val;
6ef3920a TT	82	#ifdef HAVE_OPEN64
	83	struct stat64 s;
	84
	85	val = stat64(device, &s);
	86	#else
63985320 TT	87	struct stat s;
	88
	89	val = stat(device, &s);
6ef3920a	90	#endif
63985320 TT	91
	92	if(val == -1) {
	93	fprintf(stderr, _("Could not stat %s --- %s\n"),
	94	device, error_message(errno));
	95	if (errno == ENOENT)
54434927 TT	96	fputs(_("\nThe device apparently does not exist; "
54434927 TT	97	"did you specify it correctly?\n"), stderr);
63985320 TT	98	exit(1);
63985320 TT	99	}
289e0557	100	#if defined(__FreeBSD__) \|\| defined(__FreeBSD_kernel__)
b34cbddb MA	101	/* On FreeBSD, all disk devices are character specials */
	102	if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode))
	103	#else
	104	if (!S_ISBLK(s.st_mode))
	105	#endif
	106	{
63985320 TT	107	printf(_("%s is not a block special device.\n"), device);
	108	proceed_question();
	109	return;
	110	}
	111
	112	#ifdef HAVE_LINUX_MAJOR_H
	113	#ifndef MAJOR
	114	#define MAJOR(dev) ((dev)>>8)
	115	#define MINOR(dev) ((dev) & 0xff)
	116	#endif
	117	#ifndef SCSI_BLK_MAJOR
d07b1503 TT	118	#ifdef SCSI_DISK0_MAJOR
	119	#ifdef SCSI_DISK8_MAJOR
	120	#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR \|\| \
	121	((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) \|\| \
	122	((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
	123	#else
	124	#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR \|\| \
	125	((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
	126	#endif /* defined(SCSI_DISK8_MAJOR) */
	127	#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) \|\| (M) == SCSI_CDROM_MAJOR)
	128	#else
63985320	129	#define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR \|\| (M) == SCSI_CDROM_MAJOR)
d07b1503 TT	130	#endif /* defined(SCSI_DISK0_MAJOR) */
d07b1503 TT	131	#endif /* defined(SCSI_BLK_MAJOR) */
63985320 TT	132	if (((MAJOR(s.st_rdev) == HD_MAJOR &&
	133	MINOR(s.st_rdev)%64 == 0) \|\|
	134	(SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
	135	MINOR(s.st_rdev)%16 == 0))) {
	136	printf(_("%s is entire device, not just one partition!\n"),
	137	device);
	138	proceed_question();
	139	}
	140	#endif
	141	}
	142
	143	void check_mount(const char device, int force, const char type)
	144	{
	145	errcode_t retval;
	146	int mount_flags;
	147
	148	retval = ext2fs_check_if_mounted(device, &mount_flags);
	149	if (retval) {
	150	com_err("ext2fs_check_if_mount", retval,
	151	_("while determining whether %s is mounted."),
	152	device);
	153	return;
	154	}
2fa8f37f TT	155	if (mount_flags & EXT2_MF_MOUNTED) {
	156	fprintf(stderr, _("%s is mounted; "), device);
	157	if (force) {
	158	fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
	159	"incorrect.\n"), stderr);
	160	return;
	161	}
	162	abort_mke2fs:
63985320 TT	163	fprintf(stderr, _("will not make a %s here!\n"), type);
	164	exit(1);
	165	}
2fa8f37f TT	166	if (mount_flags & EXT2_MF_BUSY) {
	167	fprintf(stderr, _("%s is apparently in use by the system; "),
	168	device);
	169	if (force) {
	170	fputs(_("mke2fs forced anyway.\n"), stderr);
	171	return;
	172	}
	173	goto abort_mke2fs;
	174	}
63985320 TT	175	}
	176
	177	void parse_journal_opts(const char *opts)
	178	{
	179	char buf, token, next, p, *arg;
	180	int len;
	181	int journal_usage = 0;
	182
	183	len = strlen(opts);
	184	buf = malloc(len+1);
	185	if (!buf) {
54434927 TT	186	fputs(_("Couldn't allocate memory to parse journal "
54434927 TT	187	"options!\n"), stderr);
63985320 TT	188	exit(1);
	189	}
	190	strcpy(buf, opts);
	191	for (token = buf; token && *token; token = next) {
	192	p = strchr(token, ',');
	193	next = 0;
	194	if (p) {
	195	*p = 0;
	196	next = p+1;
	197	}
	198	arg = strchr(token, '=');
	199	if (arg) {
	200	*arg = 0;
	201	arg++;
	202	}
	203	#if 0
	204	printf("Journal option=%s, argument=%s\n", token,
	205	arg ? arg : "NONE");
	206	#endif
	207	if (strcmp(token, "device") == 0) {
ed1b33e8	208	journal_device = blkid_get_devname(NULL, arg, NULL);
2d15576d	209	if (!journal_device) {
63985320 TT	210	journal_usage++;
	211	continue;
	212	}
63985320 TT	213	} else if (strcmp(token, "size") == 0) {
	214	if (!arg) {
	215	journal_usage++;
	216	continue;
	217	}
	218	journal_size = strtoul(arg, &p, 0);
2537b6d0	219	if (*p)
63985320	220	journal_usage++;
63985320 TT	221	} else if (strcmp(token, "v1_superblock") == 0) {
	222	journal_flags \|= EXT2_MKJOURNAL_V1_SUPER;
	223	continue;
d6a27e00 TT	224	} else
d6a27e00 TT	225	journal_usage++;
63985320 TT	226	}
63985320 TT	227	if (journal_usage) {
54434927	228	fputs(_("\nBad journal options specified.\n\n"
63985320 TT	229	"Journal options are separated by commas, "
	230	"and may take an argument which\n"
	231	"\tis set off by an equals ('=') sign.\n\n"
ddc32a04	232	"Valid journal options are:\n"
63985320 TT	233	"\tsize=<journal size in megabytes>\n"
63985320 TT	234	"\tdevice=<journal device>\n\n"
2537b6d0	235	"The journal size must be between "
54434927	236	"1024 and 102400 filesystem blocks.\n\n"), stderr);
63985320 TT	237	exit(1);
	238	}
	239	}
	240
5683e6e2	241	/*
2537b6d0 TT	242	* Determine the number of journal blocks to use, either via
	243	* user-specified # of megabytes, or via some intelligently selected
	244	* defaults.
	245	*
5683e6e2 TT	246	* Find a reasonable journal file size (in blocks) given the number of blocks
	247	* in the filesystem. For very small filesystems, it is not reasonable to
	248	* have a journal that fills more than half of the filesystem.
	249	*/
4ea7bd04	250	int figure_journal_size(int size, ext2_filsys fs)
5683e6e2 TT	251	{
	252	blk_t j_blocks;
	253
2537b6d0	254	if (fs->super->s_blocks_count < 2048) {
54434927	255	fputs(_("\nFilesystem too small for a journal\n"), stderr);
2537b6d0 TT	256	return 0;
	257	}
	258
4ea7bd04 TT	259	if (size >= 0) {
4ea7bd04 TT	260	j_blocks = size * 1024 / (fs->blocksize / 1024);
2537b6d0 TT	261	if (j_blocks < 1024 \|\| j_blocks > 102400) {
	262	fprintf(stderr, _("\nThe requested journal "
	263	"size is %d blocks; it must be\n"
	264	"between 1024 and 102400 blocks. "
	265	"Aborting.\n"),
	266	j_blocks);
	267	exit(1);
	268	}
	269	if (j_blocks > fs->super->s_free_blocks_count) {
54434927 TT	270	fputs(_("\nJournal size too big for filesystem.\n"),
54434927 TT	271	stderr);
2537b6d0 TT	272	exit(1);
	273	}
	274	return j_blocks;
	275	}
	276
	277	if (fs->super->s_blocks_count < 32768)
5683e6e2	278	j_blocks = 1024;
7e69ba2a	279	else if (fs->super->s_blocks_count < 256*1024)
5683e6e2	280	j_blocks = 4096;
7e69ba2a	281	else if (fs->super->s_blocks_count < 512*1024)
5683e6e2	282	j_blocks = 8192;
7e69ba2a TT	283	else if (fs->super->s_blocks_count < 1024*1024)
	284	j_blocks = 16384;
	285	else
	286	j_blocks = 32768;
	287
5683e6e2 TT	288
	289	return j_blocks;
	290	}
2537b6d0	291
66cf2f60 TT	292	void print_check_message(ext2_filsys fs)
	293	{
	294	printf(_("This filesystem will be automatically "
	295	"checked every %d mounts or\n"
	296	"%g days, whichever comes first. "
	297	"Use tune2fs -c or -i to override.\n"),
	298	fs->super->s_max_mnt_count,
	299	(double)fs->super->s_checkinterval / (3600 * 24));
	300	}