[thirdparty/e2fsprogs.git] / debugfs / set_fields.c

/*
 * set_fields.c --- set a superblock value
 * 
 * Copyright (C) 2000, 2001, 2002, 2003, 2004 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 <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <fcntl.h>
#include <utime.h>

#include "debugfs.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"

static struct ext2_super_block set_sb;
static struct ext2_inode set_inode;

struct field_set_info {
	const char	*name;
	void	*ptr;
	unsigned int	size;
	errcode_t (*func)(struct field_set_info *info, char *arg);
};

static errcode_t parse_uint(struct field_set_info *info, char *arg);
static errcode_t parse_int(struct field_set_info *info, char *arg);
static errcode_t parse_string(struct field_set_info *info, char *arg);
static errcode_t parse_uuid(struct field_set_info *info, char *arg);
static errcode_t parse_hashalg(struct field_set_info *info, char *arg);
static errcode_t parse_time(struct field_set_info *info, char *arg);

static struct field_set_info super_fields[] = {
	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	{ "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
	{ "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
	{ "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
	{ "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
	{ "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
	{ "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
	{ "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
	{ "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
	{ "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
	{ "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
	{ "mtime", &set_sb.s_mtime, 4, parse_time },
	{ "wtime", &set_sb.s_wtime, 4, parse_time },
	{ "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
	{ "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
	/* s_magic */
	{ "state", &set_sb.s_state, 2, parse_uint },
	{ "errors", &set_sb.s_errors, 2, parse_uint },
	{ "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_time },
	{ "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
	{ "creator_os", &set_sb.s_creator_os, 4, parse_uint },
	{ "rev_level", &set_sb.s_rev_level, 4, parse_uint },
	{ "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
	{ "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
	{ "first_ino", &set_sb.s_first_ino, 4, parse_uint },
	{ "inode_size", &set_sb.s_inode_size, 2, parse_uint },
	{ "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
	{ "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
	{ "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
	{ "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint }, 
	{ "uuid", &set_sb.s_uuid, 16, parse_uuid },
	{ "volume_name",  &set_sb.s_volume_name, 16, parse_string },
	{ "last_mounted",  &set_sb.s_last_mounted, 64, parse_string },
	{ "lastcheck",  &set_sb.s_lastcheck, 4, parse_uint },
	{ "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap, 
		  4, parse_uint },
	{ "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
	{ "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
		  parse_uint },
	{ "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2,
		  parse_uint },
	/* s_padding1 */
	{ "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid },
	{ "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
	{ "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
	{ "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
	{ "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid },
	{ "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg },
	{ "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint },
	/* s_reserved_word_pad */
	{ "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint },
	{ "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint },
	{ "mkfs_time", &set_sb.s_mkfs_time, 4, parse_time },
	{ 0, 0, 0, 0 }
};

static struct field_set_info inode_fields[] = {
	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	{ "mode", &set_inode.i_mode, 2, parse_uint },
	{ "uid", &set_inode.i_uid, 2, parse_uint },
	{ "size", &set_inode.i_uid, 4, parse_uint },
	{ "atime", &set_inode.i_atime, 4, parse_time },
	{ "ctime", &set_inode.i_ctime, 4, parse_time },
	{ "mtime", &set_inode.i_mtime, 4, parse_time },
	{ "dtime", &set_inode.i_dtime, 4, parse_time },
	{ "gid", &set_inode.i_gid, 2, parse_uint },
	{ "links_count", &set_inode.i_links_count, 2, parse_uint },
	{ "blocks", &set_inode.i_blocks, 4, parse_uint },
	{ "flags", &set_inode.i_flags, 4, parse_uint },
	{ "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint },
	{ "block[0]", &set_inode.i_block[0], 4, parse_uint },
	{ "block[1]", &set_inode.i_block[1], 4, parse_uint },
	{ "block[2]", &set_inode.i_block[2], 4, parse_uint },
	{ "block[3]", &set_inode.i_block[3], 4, parse_uint },
	{ "block[4]", &set_inode.i_block[4], 4, parse_uint },
	{ "block[5]", &set_inode.i_block[5], 4, parse_uint },
	{ "block[6]", &set_inode.i_block[6], 4, parse_uint },
	{ "block[7]", &set_inode.i_block[7], 4, parse_uint },
	{ "block[8]", &set_inode.i_block[8], 4, parse_uint },
	{ "block[9]", &set_inode.i_block[9], 4, parse_uint },
	{ "block[10]", &set_inode.i_block[10], 4, parse_uint },
	{ "block[11]", &set_inode.i_block[11], 4, parse_uint },
	{ "block[12]", &set_inode.i_block[12], 4, parse_uint },
	{ "block[13]", &set_inode.i_block[13], 4, parse_uint },
	{ "block[14]", &set_inode.i_block[14], 4, parse_uint },
	{ "generation", &set_inode.i_generation, 4, parse_uint },
	{ "file_acl", &set_inode.i_file_acl, 4, parse_uint },
	{ "dir_acl", &set_inode.i_dir_acl, 4, parse_uint },
	{ "faddr", &set_inode.i_faddr, 4, parse_uint },
	{ "frag", &set_inode.osd2.linux2.l_i_frag, 8, parse_uint },
	{ "fsize", &set_inode.osd2.linux2.l_i_fsize, 8, parse_uint },
	{ "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 8, parse_uint },
	{ "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 8, parse_uint },
	{ "author", &set_inode.osd2.hurd2.h_i_author, 8, parse_uint },
	{ 0, 0, 0, 0 }
};


static struct field_set_info *find_field(struct field_set_info *fields,
					 char *field)
{
	struct field_set_info *ss;

	if (strncmp(field, "s_", 2) == 0)
		field += 2;
	for (ss = fields ; ss->name ; ss++) {
		if (strcmp(ss->name, field) == 0)
			return ss;
	}
	return NULL;
}

static errcode_t parse_uint(struct field_set_info *info, char *arg)
{
	unsigned long	num;
	char *tmp;
	__u32	*ptr32;
	__u16	*ptr16;
	__u8	*ptr8;

	num = strtoul(arg, &tmp, 0);
	if (*tmp) {
		fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
			arg, info->name);
		return EINVAL;
	}
	switch (info->size) {
	case 4:
		ptr32 = (__u32 *) info->ptr;
		*ptr32 = num;
		break;
	case 2:
		ptr16 = (__u16 *) info->ptr;
		*ptr16 = num;
		break;
	case 1:
		ptr8 = (__u8 *) info->ptr;
		*ptr8 = num;
		break;
	}
	return 0;
}

static errcode_t parse_int(struct field_set_info *info, char *arg)
{
	long	num;
	char *tmp;
	__s32	*ptr32;
	__s16	*ptr16;
	__s8	*ptr8;

	num = strtol(arg, &tmp, 0);
	if (*tmp) {
		fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
			arg, info->name);
		return EINVAL;
	}
	switch (info->size) {
	case 4:
		ptr32 = (__s32 *) info->ptr;
		*ptr32 = num;
		break;
	case 2:
		ptr16 = (__s16 *) info->ptr;
		*ptr16 = num;
		break;
	case 1:
		ptr8 = (__s8 *) info->ptr;
		*ptr8 = num;
		break;
	}
	return 0;
}

static errcode_t parse_string(struct field_set_info *info, char *arg)
{
	char	*cp = (char *) info->ptr;

	if (strlen(arg) >= info->size) {
		fprintf(stderr, "Error maximum size for %s is %d.\n",
			info->name, info->size);
		return EINVAL;
	}
	strcpy(cp, arg);
	return 0;
}

static errcode_t parse_time(struct field_set_info *info, char *arg)
{
	struct	tm	ts;
	__u32		*ptr32;

	ptr32 = (__u32 *) info->ptr;

	if (strcmp(arg, "now") == 0) {
		*ptr32 = time(0);
		return 0;
	}
	memset(&ts, 0, sizeof(ts));
#ifdef HAVE_STRPTIME
	strptime(arg, "%Y%m%d%H%M%S", &ts);
#else
	sscanf(arg, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
	       &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
	ts.tm_year -= 1900;
	ts.tm_mon -= 1;
	if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
	    ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
	    ts.tm_min > 59 || ts.tm_sec > 61)
		ts.tm_mday = 0;
#endif
	if (ts.tm_mday == 0) {
		/* Try it as an integer... */
		return parse_uint(info, arg);
	}
	*ptr32 = mktime(&ts);
	return 0;
}

static errcode_t parse_uuid(struct field_set_info *info, char *arg)
{
	unsigned char *	p = (unsigned char *) info->ptr;
	
	if ((strcasecmp(arg, "null") == 0) ||
	    (strcasecmp(arg, "clear") == 0)) {
		uuid_clear(p);
	} else if (strcasecmp(arg, "time") == 0) {
		uuid_generate_time(p);
	} else if (strcasecmp(arg, "random") == 0) {
		uuid_generate(p);
	} else if (uuid_parse(arg, p)) {
		fprintf(stderr, "Invalid UUID format: %s\n", arg);
		return EINVAL;
	}
	return 0;
}

static errcode_t parse_hashalg(struct field_set_info *info, char *arg)
{
	int	hashv;
	unsigned char	*p = (unsigned char *) info->ptr;

	hashv = e2p_string2hash(arg);
	if (hashv < 0) {
		fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
		return EINVAL;
	}
	*p = hashv;
	return 0;
}


static void print_possible_fields(struct field_set_info *fields)
{
	struct field_set_info *ss;
	const char	*type, *cmd;
	FILE *f;

	if (fields == super_fields) {
		type = "Superblock";
		cmd = "set_super_value";
	} else {
		type = "Inode";
		cmd = "set_inode";
	}
	f = open_pager();

	fprintf(f, "%s fields supported by the %s command:\n", type, cmd);

	for (ss = fields ; ss->name ; ss++) {
		type = "unknown";
		if (ss->func == parse_string)
			type = "string";
		else if (ss->func == parse_int)
			type = "integer";
		else if (ss->func == parse_uint)
			type = "unsigned integer";
		else if (ss->func == parse_uuid)
			type = "UUID";
		else if (ss->func == parse_hashalg)
			type = "hash algorithm";
		else if (ss->func == parse_time)
			type = "date/time";
		fprintf(f, "\t%-20s\t%s\n", ss->name, type);
	}
	close_pager(f);
}


void do_set_super(int argc, char *argv[])
{
	const char *usage = "<field> <value>\n"
		"\t\"set_super_value -l\" will list the names of "
		"superblock fields\n\twhich can be set.";
	static struct field_set_info *ss;
	
	if ((argc == 2) && !strcmp(argv[1], "-l")) {
		print_possible_fields(super_fields);
		return;
	}

	if (common_args_process(argc, argv, 3, 3, "set_super_value",
				usage, CHECK_FS_RW))
		return;

	if ((ss = find_field(super_fields, argv[1])) == 0) {
		com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
		return;
	}
	set_sb = *current_fs->super;
	if (ss->func(ss, argv[2]) == 0) {
		*current_fs->super = set_sb;
		ext2fs_mark_super_dirty(current_fs);
	}
}

void do_set_inode(int argc, char *argv[])
{
	const char *usage = "<inode> <field> <value>\n"
		"\t\"set_inode -l\" will list the names of "
		"the fields in an ext2 inode\n\twhich can be set.";
	static struct field_set_info *ss;
	ext2_ino_t ino;
	
	if ((argc == 2) && !strcmp(argv[1], "-l")) {
		print_possible_fields(inode_fields);
		return;
	}

	if (common_args_process(argc, argv, 4, 4, "set_inode",
				usage, CHECK_FS_RW))
		return;

	if ((ss = find_field(inode_fields, argv[2])) == 0) {
		com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
		return;
	}

	ino = string_to_inode(argv[1]);
	if (!ino)
		return;

	if (debugfs_read_inode(ino, &set_inode, argv[1]))
		return;

	if (ss->func(ss, argv[3]) == 0) {
		if (debugfs_write_inode(ino, &set_inode, argv[1]))
			return;
	}
}
Commit	Line	Data
c6bd0c97	1	/*
7dec050a TT	2	* set_fields.c --- set a superblock value
	3	*
	4	* Copyright (C) 2000, 2001, 2002, 2003, 2004 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%
c6bd0c97 TT	10	*/
	11
	12	#include <stdio.h>
	13	#include <unistd.h>
	14	#include <stdlib.h>
	15	#include <ctype.h>
	16	#include <string.h>
	17	#include <time.h>
	18	#include <sys/types.h>
	19	#include <sys/stat.h>
	20	#ifdef HAVE_ERRNO_H
	21	#include <errno.h>
	22	#endif
	23	#include <fcntl.h>
	24	#include <utime.h>
	25
	26	#include "debugfs.h"
3e699064 TT	27	#include "uuid/uuid.h"
3e699064 TT	28	#include "e2p/e2p.h"
c6bd0c97 TT	29
c6bd0c97 TT	30	static struct ext2_super_block set_sb;
7dec050a	31	static struct ext2_inode set_inode;
c6bd0c97	32
7dec050a	33	struct field_set_info {
b044c2e0	34	const char *name;
c6bd0c97	35	void *ptr;
54434927	36	unsigned int size;
7dec050a	37	errcode_t (func)(struct field_set_info info, char *arg);
c6bd0c97 TT	38	};
c6bd0c97 TT	39
7dec050a TT	40	static errcode_t parse_uint(struct field_set_info info, char arg);
	41	static errcode_t parse_int(struct field_set_info info, char arg);
	42	static errcode_t parse_string(struct field_set_info info, char arg);
	43	static errcode_t parse_uuid(struct field_set_info info, char arg);
	44	static errcode_t parse_hashalg(struct field_set_info info, char arg);
	45	static errcode_t parse_time(struct field_set_info info, char arg);
c6bd0c97	46
7dec050a	47	static struct field_set_info super_fields[] = {
c6bd0c97 TT	48	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	49	{ "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
	50	{ "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
	51	{ "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
	52	{ "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
	53	{ "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
	54	{ "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
	55	{ "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
	56	{ "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
	57	{ "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
	58	{ "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
7dec050a TT	59	{ "mtime", &set_sb.s_mtime, 4, parse_time },
7dec050a TT	60	{ "wtime", &set_sb.s_wtime, 4, parse_time },
c6bd0c97 TT	61	{ "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
	62	{ "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
	63	/* s_magic */
	64	{ "state", &set_sb.s_state, 2, parse_uint },
	65	{ "errors", &set_sb.s_errors, 2, parse_uint },
	66	{ "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
7dec050a	67	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_time },
c6bd0c97 TT	68	{ "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
	69	{ "creator_os", &set_sb.s_creator_os, 4, parse_uint },
	70	{ "rev_level", &set_sb.s_rev_level, 4, parse_uint },
	71	{ "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
	72	{ "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
	73	{ "first_ino", &set_sb.s_first_ino, 4, parse_uint },
426d734f	74	{ "inode_size", &set_sb.s_inode_size, 2, parse_uint },
c6bd0c97 TT	75	{ "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
	76	{ "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
	77	{ "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
	78	{ "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint },
f61fc0b5	79	{ "uuid", &set_sb.s_uuid, 16, parse_uuid },
c6bd0c97 TT	80	{ "volume_name", &set_sb.s_volume_name, 16, parse_string },
c6bd0c97 TT	81	{ "last_mounted", &set_sb.s_last_mounted, 64, parse_string },
364a373e	82	{ "lastcheck", &set_sb.s_lastcheck, 4, parse_uint },
c6bd0c97 TT	83	{ "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap,
	84	4, parse_uint },
	85	{ "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
	86	{ "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
	87	parse_uint },
a06bd026 TT	88	{ "reserved_gdt_blocks", &set_sb.s_reserved_gdt_blocks, 2,
a06bd026 TT	89	parse_uint },
c6bd0c97	90	/* s_padding1 */
f61fc0b5	91	{ "journal_uuid", &set_sb.s_journal_uuid, 16, parse_uuid },
c6bd0c97 TT	92	{ "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
	93	{ "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
	94	{ "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
f61fc0b5 TT	95	{ "hash_seed", &set_sb.s_hash_seed, 16, parse_uuid },
f61fc0b5 TT	96	{ "def_hash_version", &set_sb.s_def_hash_version, 1, parse_hashalg },
a06bd026 TT	97	{ "jnl_backup_type", &set_sb.s_jnl_backup_type, 1, parse_uint },
	98	/* s_reserved_word_pad */
	99	{ "default_mount_opts", &set_sb.s_default_mount_opts, 4, parse_uint },
	100	{ "first_meta_bg", &set_sb.s_first_meta_bg, 4, parse_uint },
7dec050a	101	{ "mkfs_time", &set_sb.s_mkfs_time, 4, parse_time },
c6bd0c97 TT	102	{ 0, 0, 0, 0 }
	103	};
	104
7dec050a TT	105	static struct field_set_info inode_fields[] = {
	106	{ "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
	107	{ "mode", &set_inode.i_mode, 2, parse_uint },
	108	{ "uid", &set_inode.i_uid, 2, parse_uint },
	109	{ "size", &set_inode.i_uid, 4, parse_uint },
	110	{ "atime", &set_inode.i_atime, 4, parse_time },
	111	{ "ctime", &set_inode.i_ctime, 4, parse_time },
	112	{ "mtime", &set_inode.i_mtime, 4, parse_time },
	113	{ "dtime", &set_inode.i_dtime, 4, parse_time },
	114	{ "gid", &set_inode.i_gid, 2, parse_uint },
	115	{ "links_count", &set_inode.i_links_count, 2, parse_uint },
	116	{ "blocks", &set_inode.i_blocks, 4, parse_uint },
	117	{ "flags", &set_inode.i_flags, 4, parse_uint },
	118	{ "translator", &set_inode.osd1.hurd1.h_i_translator, 4, parse_uint },
	119	{ "block[0]", &set_inode.i_block[0], 4, parse_uint },
	120	{ "block[1]", &set_inode.i_block[1], 4, parse_uint },
	121	{ "block[2]", &set_inode.i_block[2], 4, parse_uint },
	122	{ "block[3]", &set_inode.i_block[3], 4, parse_uint },
	123	{ "block[4]", &set_inode.i_block[4], 4, parse_uint },
	124	{ "block[5]", &set_inode.i_block[5], 4, parse_uint },
	125	{ "block[6]", &set_inode.i_block[6], 4, parse_uint },
	126	{ "block[7]", &set_inode.i_block[7], 4, parse_uint },
	127	{ "block[8]", &set_inode.i_block[8], 4, parse_uint },
	128	{ "block[9]", &set_inode.i_block[9], 4, parse_uint },
	129	{ "block[10]", &set_inode.i_block[10], 4, parse_uint },
	130	{ "block[11]", &set_inode.i_block[11], 4, parse_uint },
	131	{ "block[12]", &set_inode.i_block[12], 4, parse_uint },
	132	{ "block[13]", &set_inode.i_block[13], 4, parse_uint },
	133	{ "block[14]", &set_inode.i_block[14], 4, parse_uint },
	134	{ "generation", &set_inode.i_generation, 4, parse_uint },
	135	{ "file_acl", &set_inode.i_file_acl, 4, parse_uint },
	136	{ "dir_acl", &set_inode.i_dir_acl, 4, parse_uint },
	137	{ "faddr", &set_inode.i_faddr, 4, parse_uint },
	138	{ "frag", &set_inode.osd2.linux2.l_i_frag, 8, parse_uint },
	139	{ "fsize", &set_inode.osd2.linux2.l_i_fsize, 8, parse_uint },
	140	{ "uid_high", &set_inode.osd2.linux2.l_i_uid_high, 8, parse_uint },
	141	{ "gid_high", &set_inode.osd2.linux2.l_i_gid_high, 8, parse_uint },
	142	{ "author", &set_inode.osd2.hurd2.h_i_author, 8, parse_uint },
	143	{ 0, 0, 0, 0 }
	144	};
	145
	146
	147	static struct field_set_info find_field(struct field_set_info fields,
	148	char *field)
c6bd0c97	149	{
7dec050a	150	struct field_set_info *ss;
c6bd0c97	151
3db9305a TT	152	if (strncmp(field, "s_", 2) == 0)
3db9305a TT	153	field += 2;
7dec050a	154	for (ss = fields ; ss->name ; ss++) {
c6bd0c97 TT	155	if (strcmp(ss->name, field) == 0)
	156	return ss;
	157	}
	158	return NULL;
	159	}
	160
7dec050a	161	static errcode_t parse_uint(struct field_set_info info, char arg)
c6bd0c97 TT	162	{
	163	unsigned long num;
	164	char *tmp;
	165	__u32 *ptr32;
	166	__u16 *ptr16;
	167	__u8 *ptr8;
	168
	169	num = strtoul(arg, &tmp, 0);
	170	if (*tmp) {
	171	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	172	arg, info->name);
	173	return EINVAL;
	174	}
	175	switch (info->size) {
	176	case 4:
	177	ptr32 = (__u32 *) info->ptr;
	178	*ptr32 = num;
	179	break;
	180	case 2:
	181	ptr16 = (__u16 *) info->ptr;
	182	*ptr16 = num;
	183	break;
	184	case 1:
	185	ptr8 = (__u8 *) info->ptr;
	186	*ptr8 = num;
	187	break;
	188	}
	189	return 0;
	190	}
	191
7dec050a	192	static errcode_t parse_int(struct field_set_info info, char arg)
c6bd0c97 TT	193	{
	194	long num;
	195	char *tmp;
	196	__s32 *ptr32;
	197	__s16 *ptr16;
	198	__s8 *ptr8;
	199
	200	num = strtol(arg, &tmp, 0);
	201	if (*tmp) {
	202	fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
	203	arg, info->name);
	204	return EINVAL;
	205	}
	206	switch (info->size) {
	207	case 4:
	208	ptr32 = (__s32 *) info->ptr;
	209	*ptr32 = num;
	210	break;
	211	case 2:
	212	ptr16 = (__s16 *) info->ptr;
	213	*ptr16 = num;
	214	break;
	215	case 1:
	216	ptr8 = (__s8 *) info->ptr;
	217	*ptr8 = num;
	218	break;
	219	}
	220	return 0;
	221	}
	222
7dec050a	223	static errcode_t parse_string(struct field_set_info info, char arg)
c6bd0c97 TT	224	{
	225	char cp = (char ) info->ptr;
	226
	227	if (strlen(arg) >= info->size) {
	228	fprintf(stderr, "Error maximum size for %s is %d.\n",
	229	info->name, info->size);
	230	return EINVAL;
	231	}
	232	strcpy(cp, arg);
	233	return 0;
	234	}
	235
7dec050a TT	236	static errcode_t parse_time(struct field_set_info info, char arg)
	237	{
	238	struct tm ts;
	239	__u32 *ptr32;
	240
	241	ptr32 = (__u32 *) info->ptr;
	242
	243	if (strcmp(arg, "now") == 0) {
	244	*ptr32 = time(0);
	245	return 0;
	246	}
	247	memset(&ts, 0, sizeof(ts));
	248	#ifdef HAVE_STRPTIME
	249	strptime(arg, "%Y%m%d%H%M%S", &ts);
	250	#else
	251	sscanf(arg, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
	252	&ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
	253	ts.tm_year -= 1900;
	254	ts.tm_mon -= 1;
	255	if (ts.tm_year < 0 \|\| ts.tm_mon < 0 \|\| ts.tm_mon > 11 \|\|
	256	ts.tm_mday < 0 \|\| ts.tm_mday > 31 \|\| ts.tm_hour > 23 \|\|
	257	ts.tm_min > 59 \|\| ts.tm_sec > 61)
	258	ts.tm_mday = 0;
	259	#endif
	260	if (ts.tm_mday == 0) {
	261	/* Try it as an integer... */
	262	return parse_uint(info, arg);
	263	}
	264	*ptr32 = mktime(&ts);
	265	return 0;
	266	}
	267
	268	static errcode_t parse_uuid(struct field_set_info info, char arg)
f61fc0b5	269	{
3e699064	270	unsigned char * p = (unsigned char *) info->ptr;
f61fc0b5 TT	271
	272	if ((strcasecmp(arg, "null") == 0) \|\|
	273	(strcasecmp(arg, "clear") == 0)) {
	274	uuid_clear(p);
	275	} else if (strcasecmp(arg, "time") == 0) {
	276	uuid_generate_time(p);
	277	} else if (strcasecmp(arg, "random") == 0) {
	278	uuid_generate(p);
	279	} else if (uuid_parse(arg, p)) {
	280	fprintf(stderr, "Invalid UUID format: %s\n", arg);
	281	return EINVAL;
	282	}
	283	return 0;
	284	}
	285
7dec050a	286	static errcode_t parse_hashalg(struct field_set_info info, char arg)
f61fc0b5 TT	287	{
	288	int hashv;
	289	unsigned char p = (unsigned char ) info->ptr;
	290
	291	hashv = e2p_string2hash(arg);
	292	if (hashv < 0) {
	293	fprintf(stderr, "Invalid hash algorithm: %s\n", arg);
	294	return EINVAL;
	295	}
	296	*p = hashv;
	297	return 0;
	298	}
	299
	300
7dec050a	301	static void print_possible_fields(struct field_set_info *fields)
6e96adcb	302	{
7dec050a TT	303	struct field_set_info *ss;
	304	const char type, cmd;
	305	FILE *f;
6e96adcb	306
7dec050a TT	307	if (fields == super_fields) {
	308	type = "Superblock";
	309	cmd = "set_super_value";
	310	} else {
	311	type = "Inode";
	312	cmd = "set_inode";
	313	}
	314	f = open_pager();
	315
	316	fprintf(f, "%s fields supported by the %s command:\n", type, cmd);
	317
	318	for (ss = fields ; ss->name ; ss++) {
6e96adcb TT	319	type = "unknown";
	320	if (ss->func == parse_string)
	321	type = "string";
	322	else if (ss->func == parse_int)
	323	type = "integer";
	324	else if (ss->func == parse_uint)
	325	type = "unsigned integer";
f61fc0b5 TT	326	else if (ss->func == parse_uuid)
	327	type = "UUID";
	328	else if (ss->func == parse_hashalg)
	329	type = "hash algorithm";
7dec050a TT	330	else if (ss->func == parse_time)
	331	type = "date/time";
	332	fprintf(f, "\t%-20s\t%s\n", ss->name, type);
6e96adcb	333	}
7dec050a	334	close_pager(f);
6e96adcb TT	335	}
	336
	337
c6bd0c97 TT	338	void do_set_super(int argc, char *argv[])
c6bd0c97 TT	339	{
e1018eea TT	340	const char *usage = "<field> <value>\n"
	341	"\t\"set_super_value -l\" will list the names of "
	342	"superblock fields\n\twhich can be set.";
7dec050a	343	static struct field_set_info *ss;
c6bd0c97	344
6e96adcb	345	if ((argc == 2) && !strcmp(argv[1], "-l")) {
7dec050a	346	print_possible_fields(super_fields);
6e96adcb TT	347	return;
	348	}
	349
e1018eea TT	350	if (common_args_process(argc, argv, 3, 3, "set_super_value",
e1018eea TT	351	usage, CHECK_FS_RW))
c6bd0c97 TT	352	return;
c6bd0c97 TT	353
7dec050a	354	if ((ss = find_field(super_fields, argv[1])) == 0) {
c6bd0c97 TT	355	com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
	356	return;
	357	}
	358	set_sb = *current_fs->super;
	359	if (ss->func(ss, argv[2]) == 0) {
	360	*current_fs->super = set_sb;
	361	ext2fs_mark_super_dirty(current_fs);
	362	}
	363	}
7dec050a TT	364
	365	void do_set_inode(int argc, char *argv[])
	366	{
	367	const char *usage = "<inode> <field> <value>\n"
	368	"\t\"set_inode -l\" will list the names of "
	369	"the fields in an ext2 inode\n\twhich can be set.";
	370	static struct field_set_info *ss;
	371	ext2_ino_t ino;
	372
	373	if ((argc == 2) && !strcmp(argv[1], "-l")) {
	374	print_possible_fields(inode_fields);
	375	return;
	376	}
	377
	378	if (common_args_process(argc, argv, 4, 4, "set_inode",
	379	usage, CHECK_FS_RW))
	380	return;
	381
	382	if ((ss = find_field(inode_fields, argv[2])) == 0) {
	383	com_err(argv[0], 0, "invalid field specifier: %s", argv[2]);
	384	return;
	385	}
	386
	387	ino = string_to_inode(argv[1]);
	388	if (!ino)
	389	return;
	390
	391	if (debugfs_read_inode(ino, &set_inode, argv[1]))
	392	return;
	393
	394	if (ss->func(ss, argv[3]) == 0) {
	395	if (debugfs_write_inode(ino, &set_inode, argv[1]))
	396	return;
	397	}
	398	}