mirror of https://github.com/vitalif/e2fsprogs
245 lines
7.6 KiB
C
245 lines
7.6 KiB
C
/*
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* ls.c - List the contents of an ext2fs superblock
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*
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* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
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* Laboratoire MASI, Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* Copyright (C) 1995, 1996, 1997 Theodore Ts'o <tytso@mit.edu>
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*
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* This file can be redistributed under the terms of the GNU Library General
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* Public License
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <string.h>
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#include <grp.h>
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#include <pwd.h>
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#include <time.h>
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#include "e2p.h"
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/*
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* The ext2fs library private definition of the ext2 superblock, so we
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* don't have to depend on the kernel's definition of the superblock,
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* which might not have the latest features.
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*/
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struct ext2fs_sb {
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__u32 s_inodes_count; /* Inodes count */
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__u32 s_blocks_count; /* Blocks count */
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__u32 s_r_blocks_count; /* Reserved blocks count */
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__u32 s_free_blocks_count; /* Free blocks count */
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__u32 s_free_inodes_count; /* Free inodes count */
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__u32 s_first_data_block; /* First Data Block */
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__u32 s_log_block_size; /* Block size */
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__s32 s_log_frag_size; /* Fragment size */
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__u32 s_blocks_per_group; /* # Blocks per group */
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__u32 s_frags_per_group; /* # Fragments per group */
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__u32 s_inodes_per_group; /* # Inodes per group */
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__u32 s_mtime; /* Mount time */
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__u32 s_wtime; /* Write time */
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__u16 s_mnt_count; /* Mount count */
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__s16 s_max_mnt_count; /* Maximal mount count */
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__u16 s_magic; /* Magic signature */
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__u16 s_state; /* File system state */
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__u16 s_errors; /* Behaviour when detecting errors */
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__u16 s_minor_rev_level; /* minor revision level */
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__u32 s_lastcheck; /* time of last check */
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__u32 s_checkinterval; /* max. time between checks */
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__u32 s_creator_os; /* OS */
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__u32 s_rev_level; /* Revision level */
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__u16 s_def_resuid; /* Default uid for reserved blocks */
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__u16 s_def_resgid; /* Default gid for reserved blocks */
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/*
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* These fields are for EXT2_DYNAMIC_REV superblocks only.
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*
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* Note: the difference between the compatible feature set and
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* the incompatible feature set is that if there is a bit set
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* in the incompatible feature set that the kernel doesn't
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* know about, it should refuse to mount the filesystem.
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*
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* e2fsck's requirements are more strict; if it doesn't know
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* about a feature in either the compatible or incompatible
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* feature set, it must abort and not try to meddle with
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* things it doesn't understand...
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*/
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__u32 s_first_ino; /* First non-reserved inode */
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__u16 s_inode_size; /* size of inode structure */
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__u16 s_block_group_nr; /* block group # of this superblock */
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__u32 s_feature_compat; /* compatible feature set */
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__u32 s_feature_incompat; /* incompatible feature set */
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__u32 s_feature_ro_compat; /* readonly-compatible feature set */
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__u8 s_uuid[16]; /* 128-bit uuid for volume */
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char s_volume_name[16]; /* volume name */
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char s_last_mounted[64]; /* directory where last mounted */
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__u32 s_reserved[206]; /* Padding to the end of the block */
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};
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static void print_user (unsigned short uid)
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{
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struct passwd *pw;
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printf ("%u ", uid);
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pw = getpwuid (uid);
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if (pw == NULL)
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printf ("(user unknown)\n");
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else
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printf ("(user %s)\n", pw->pw_name);
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}
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static void print_group (unsigned short gid)
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{
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struct group *gr;
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printf ("%u ", gid);
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gr = getgrgid (gid);
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if (gr == NULL)
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printf ("(group unknown)\n");
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else
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printf ("(group %s)\n", gr->gr_name);
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}
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#define MONTH_INT (86400 * 30)
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#define WEEK_INT (86400 * 7)
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#define DAY_INT (86400)
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#define HOUR_INT (60 * 60)
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#define MINUTE_INT (60)
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static const char *interval_string(unsigned int secs)
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{
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static char buf[256], tmp[80];
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int hr, min, num;
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buf[0] = 0;
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if (secs == 0)
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return "<none>";
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if (secs >= MONTH_INT) {
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num = secs / MONTH_INT;
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secs -= num*MONTH_INT;
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sprintf(buf, "%d month%s", num, (num>1) ? "s" : "");
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}
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if (secs >= WEEK_INT) {
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num = secs / WEEK_INT;
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secs -= num*WEEK_INT;
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sprintf(tmp, "%s%d week%s", buf[0] ? ", " : "",
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num, (num>1) ? "s" : "");
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strcat(buf, tmp);
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}
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if (secs >= DAY_INT) {
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num = secs / DAY_INT;
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secs -= num*DAY_INT;
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sprintf(tmp, "%s%d day%s", buf[0] ? ", " : "",
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num, (num>1) ? "s" : "");
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strcat(buf, tmp);
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}
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if (secs > 0) {
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hr = secs / HOUR_INT;
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secs -= hr*HOUR_INT;
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min = secs / MINUTE_INT;
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secs -= min*MINUTE_INT;
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sprintf(tmp, "%s%d:%02d:%02d", buf[0] ? ", " : "",
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hr, min, secs);
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strcat(buf, tmp);
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}
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return buf;
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}
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#ifndef EXT2_INODE_SIZE
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#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode)
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#endif
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void list_super (struct ext2_super_block * s)
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{
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int inode_blocks_per_group;
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struct ext2fs_sb *sb = (struct ext2fs_sb *) s;
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char buf[80];
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const char *os;
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time_t tm;
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inode_blocks_per_group = (((s->s_inodes_per_group *
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EXT2_INODE_SIZE(s)) +
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EXT2_BLOCK_SIZE(s) - 1) /
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EXT2_BLOCK_SIZE(s));
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printf ("Filesystem magic number: 0x%04X\n", s->s_magic);
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printf ("Filesystem revision #: %d\n", s->s_rev_level);
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if (sb->s_volume_name[0]) {
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memset(buf, 0, sizeof(buf));
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strncpy(buf, sb->s_volume_name, sizeof(sb->s_volume_name));
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} else
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strcpy(buf, "<none>");
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printf("Filesystem volume name: %s\n", buf);
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if (sb->s_last_mounted[0]) {
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memset(buf, 0, sizeof(buf));
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strncpy(buf, sb->s_last_mounted, sizeof(sb->s_last_mounted));
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} else
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strcpy(buf, "<not available>");
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printf("Last mounted on: %s\n", buf);
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if (!e2p_is_null_uuid(sb->s_uuid)) {
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e2p_uuid_to_str(sb->s_uuid, buf);
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} else
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strcpy(buf, "<none>");
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printf("Filesystem UUID: %s\n", buf);
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printf ("Filesystem state: ");
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print_fs_state (stdout, s->s_state);
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printf ("\n");
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printf ("Errors behavior: ");
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print_fs_errors (stdout, s->s_errors);
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printf ("\n");
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switch (s->s_creator_os) {
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case EXT2_OS_LINUX: os = "Linux"; break;
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case EXT2_OS_HURD: os = "GNU"; break;
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case EXT2_OS_MASIX: os = "Masix"; break;
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default: os = "unknown"; break;
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}
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printf("Filesystem OS type: %s\n", os);
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printf("Inode count: %u\n", s->s_inodes_count);
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printf("Block count: %u\n", s->s_blocks_count);
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printf("Reserved block count: %u\n", s->s_r_blocks_count);
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printf("Free blocks: %u\n", s->s_free_blocks_count);
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printf("Free inodes: %u\n", s->s_free_inodes_count);
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printf("First block: %u\n", s->s_first_data_block);
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printf("Block size: %u\n", EXT2_BLOCK_SIZE(s));
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printf("Fragment size: %u\n", EXT2_FRAG_SIZE(s));
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printf("Blocks per group: %u\n", s->s_blocks_per_group);
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printf("Fragments per group: %u\n", s->s_frags_per_group);
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printf("Inodes per group: %u\n", s->s_inodes_per_group);
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printf("Inode blocks per group: %u\n", inode_blocks_per_group);
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tm = s->s_mtime;
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printf("Last mount time: %s", ctime(&tm));
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tm = s->s_wtime;
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printf("Last write time: %s", ctime(&tm));
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printf("Mount count: %u\n", s->s_mnt_count);
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printf("Maximum mount count: %d\n", s->s_max_mnt_count);
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tm = s->s_lastcheck;
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printf("Last checked: %s", ctime(&tm));
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printf("Check interval: %u (%s)\n", s->s_checkinterval,
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interval_string(s->s_checkinterval));
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if (s->s_checkinterval)
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{
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time_t next;
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next = s->s_lastcheck + s->s_checkinterval;
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printf("Next check after: %s", ctime(&next));
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}
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#ifdef EXT2_DEF_RESUID
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printf("Reserved blocks uid: ");
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print_user(s->s_def_resuid);
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printf("Reserved blocks gid: ");
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print_group(s->s_def_resgid);
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#endif
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#ifdef EXT2_DYNAMIC_REV
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if (s->s_rev_level >= EXT2_DYNAMIC_REV) {
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printf("First inode: %d\n", s->s_first_ino);
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printf("Inode size: %d\n", s->s_inode_size);
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}
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#endif
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}
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