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ls.c

/*
 * ls.c                 - List the contents of an ext2fs superblock
 *
 * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
 *                                 Laboratoire MASI, Institut Blaise Pascal
 *                                 Universite Pierre et Marie Curie (Paris VI)
 *
 * Copyright (C) 1995, 1996, 1997  Theodore Ts'o <tytso@mit.edu>
 * 
 * This file can be redistributed under the terms of the GNU Library General
 * Public License
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <string.h>
#include <grp.h>
#include <pwd.h>
#include <time.h>

#include "e2p.h"

static void print_user (unsigned short uid, FILE *f)
{
      struct passwd *pw;

      fprintf(f, "%u ", uid);
      pw = getpwuid (uid);
      if (pw == NULL)
            fprintf(f, "(user unknown)\n");
      else
            fprintf(f, "(user %s)\n", pw->pw_name);
}

static void print_group (unsigned short gid, FILE *f)
{
      struct group *gr;

      fprintf(f, "%u ", gid);
      gr = getgrgid (gid);
      if (gr == NULL)
            fprintf(f, "(group unknown)\n");
      else
            fprintf(f, "(group %s)\n", gr->gr_name);
}

#define MONTH_INT (86400 * 30)
#define WEEK_INT (86400 * 7)
#define DAY_INT   (86400)
#define HOUR_INT (60 * 60)
#define MINUTE_INT (60)

static const char *interval_string(unsigned int secs)
{
      static char buf[256], tmp[80];
      int         hr, min, num;

      buf[0] = 0;

      if (secs == 0)
            return "<none>";

      if (secs >= MONTH_INT) {
            num = secs / MONTH_INT;
            secs -= num*MONTH_INT;
            sprintf(buf, "%d month%s", num, (num>1) ? "s" : "");
      }
      if (secs >= WEEK_INT) {
            num = secs / WEEK_INT;
            secs -= num*WEEK_INT;
            sprintf(tmp, "%s%d week%s", buf[0] ? ", " : "",
                  num, (num>1) ? "s" : "");
            strcat(buf, tmp);
      }
      if (secs >= DAY_INT) {
            num = secs / DAY_INT;
            secs -= num*DAY_INT;
            sprintf(tmp, "%s%d day%s", buf[0] ? ", " : "",
                  num, (num>1) ? "s" : "");
            strcat(buf, tmp);
      }
      if (secs > 0) {
            hr = secs / HOUR_INT;
            secs -= hr*HOUR_INT;
            min = secs / MINUTE_INT;
            secs -= min*MINUTE_INT;
            sprintf(tmp, "%s%d:%02d:%02d", buf[0] ? ", " : "",
                  hr, min, secs);
            strcat(buf, tmp);
      }
      return buf;
}

static void print_features(struct ext2_super_block * s, FILE *f)
{
#ifdef EXT2_DYNAMIC_REV
      int   i, j, printed=0;
      __u32 *mask = &s->s_feature_compat, m;

      fprintf(f, "Filesystem features:     ");
      for (i=0; i <3; i++,mask++) {
            for (j=0,m=1; j < 32; j++, m<<=1) {
                  if (*mask & m) {
                        fprintf(f, " %s", e2p_feature2string(i, m));
                        printed++;
                  }
            }
      }
      if (printed == 0)
            fprintf(f, " (none)");
      fprintf(f, "\n");
#endif
}

static void print_mntopts(struct ext2_super_block * s, FILE *f)
{
#ifdef EXT2_DYNAMIC_REV
      int   i, printed=0;
      __u32 mask = s->s_default_mount_opts, m;

      fprintf(f, "Default mount options:   ");
      if (mask & EXT3_DEFM_JMODE) {
            fprintf(f, " %s", e2p_mntopt2string(mask & EXT3_DEFM_JMODE));
            printed++;
      }
      for (i=0,m=1; i < 32; i++, m<<=1) {
            if (m & EXT3_DEFM_JMODE)
                  continue;
            if (mask & m) {
                  fprintf(f, " %s", e2p_mntopt2string(m));
                  printed++;
            }
      }
      if (printed == 0)
            fprintf(f, " (none)");
      fprintf(f, "\n");
#endif
}

static void print_super_flags(struct ext2_super_block * s, FILE *f)
{
      int   flags_found = 0;

      if (s->s_flags == 0)
            return;

      fputs("Filesystem flags:         ", f);
      if (s->s_flags & EXT2_FLAGS_SIGNED_HASH) {
            fputs("signed_directory_hash ", f);
            flags_found++;
      }
      if (s->s_flags & EXT2_FLAGS_UNSIGNED_HASH) {
            fputs("unsigned_directory_hash ", f);
            flags_found++;
      }
      if (s->s_flags & EXT2_FLAGS_TEST_FILESYS) {
            fputs("test_filesystem ", f);
            flags_found++;
      }
      if (flags_found)
            fputs("\n", f);
      else
            fputs("(none)\n", f);
}


#ifndef EXT2_INODE_SIZE
#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode)
#endif

#ifndef EXT2_GOOD_OLD_REV
#define EXT2_GOOD_OLD_REV 0
#endif

void list_super2(struct ext2_super_block * sb, FILE *f)
{
      int inode_blocks_per_group;
      char buf[80], *str;
      time_t      tm;

      inode_blocks_per_group = (((sb->s_inodes_per_group *
                            EXT2_INODE_SIZE(sb)) +
                           EXT2_BLOCK_SIZE(sb) - 1) /
                          EXT2_BLOCK_SIZE(sb));
      if (sb->s_volume_name[0]) {
            memset(buf, 0, sizeof(buf));
            strncpy(buf, sb->s_volume_name, sizeof(sb->s_volume_name));
      } else
            strcpy(buf, "<none>");
      fprintf(f, "Filesystem volume name:   %s\n", buf);
      if (sb->s_last_mounted[0]) {
            memset(buf, 0, sizeof(buf));
            strncpy(buf, sb->s_last_mounted, sizeof(sb->s_last_mounted));
      } else
            strcpy(buf, "<not available>");
      fprintf(f, "Last mounted on:          %s\n", buf);
      fprintf(f, "Filesystem UUID:          %s\n", e2p_uuid2str(sb->s_uuid));
      fprintf(f, "Filesystem magic number:  0x%04X\n", sb->s_magic);
      fprintf(f, "Filesystem revision #:    %d", sb->s_rev_level);
      if (sb->s_rev_level == EXT2_GOOD_OLD_REV) {
            fprintf(f, " (original)\n");
#ifdef EXT2_DYNAMIC_REV
      } else if (sb->s_rev_level == EXT2_DYNAMIC_REV) {
            fprintf(f, " (dynamic)\n");
#endif
      } else
            fprintf(f, " (unknown)\n");
      print_features(sb, f);
      print_super_flags(sb, f);
      print_mntopts(sb, f);
      fprintf(f, "Filesystem state:        ");
      print_fs_state (f, sb->s_state);
      fprintf(f, "\n");
      fprintf(f, "Errors behavior:          ");
      print_fs_errors(f, sb->s_errors);
      fprintf(f, "\n");
      str = e2p_os2string(sb->s_creator_os);
      fprintf(f, "Filesystem OS type:       %s\n", str);
      free(str);
      fprintf(f, "Inode count:              %u\n", sb->s_inodes_count);
      fprintf(f, "Block count:              %u\n", sb->s_blocks_count);
      fprintf(f, "Reserved block count:     %u\n", sb->s_r_blocks_count);
      fprintf(f, "Free blocks:              %u\n", sb->s_free_blocks_count);
      fprintf(f, "Free inodes:              %u\n", sb->s_free_inodes_count);
      fprintf(f, "First block:              %u\n", sb->s_first_data_block);
      fprintf(f, "Block size:               %u\n", EXT2_BLOCK_SIZE(sb));
      fprintf(f, "Fragment size:            %u\n", EXT2_FRAG_SIZE(sb));
      if (sb->s_reserved_gdt_blocks)
            fprintf(f, "Reserved GDT blocks:      %u\n", 
                  sb->s_reserved_gdt_blocks);
      fprintf(f, "Blocks per group:         %u\n", sb->s_blocks_per_group);
      fprintf(f, "Fragments per group:      %u\n", sb->s_frags_per_group);
      fprintf(f, "Inodes per group:         %u\n", sb->s_inodes_per_group);
      fprintf(f, "Inode blocks per group:   %u\n", inode_blocks_per_group);
      if (sb->s_raid_stride)
            fprintf(f, "RAID stride:              %u\n",
                  sb->s_raid_stride);
      if (sb->s_raid_stripe_width)
            fprintf(f, "RAID stripe width:        %u\n",
                  sb->s_raid_stripe_width);
      if (sb->s_first_meta_bg)
            fprintf(f, "First meta block group:   %u\n",
                  sb->s_first_meta_bg);
      if (sb->s_mkfs_time) {
            tm = sb->s_mkfs_time;
            fprintf(f, "Filesystem created:       %s", ctime(&tm));
      }
      tm = sb->s_mtime;
      fprintf(f, "Last mount time:          %s",
            sb->s_mtime ? ctime(&tm) : "n/a\n");
      tm = sb->s_wtime;
      fprintf(f, "Last write time:          %s", ctime(&tm));
      fprintf(f, "Mount count:              %u\n", sb->s_mnt_count);
      fprintf(f, "Maximum mount count:      %d\n", sb->s_max_mnt_count);
      tm = sb->s_lastcheck;
      fprintf(f, "Last checked:             %s", ctime(&tm));
      fprintf(f, "Check interval:           %u (%s)\n", sb->s_checkinterval,
             interval_string(sb->s_checkinterval));
      if (sb->s_checkinterval)
      {
            time_t next;

            next = sb->s_lastcheck + sb->s_checkinterval;
            fprintf(f, "Next check after:         %s", ctime(&next));
      }
      fprintf(f, "Reserved blocks uid:      ");
      print_user(sb->s_def_resuid, f);
      fprintf(f, "Reserved blocks gid:      ");
      print_group(sb->s_def_resgid, f);
      if (sb->s_rev_level >= EXT2_DYNAMIC_REV) {
            fprintf(f, "First inode:              %d\n", sb->s_first_ino);
            fprintf(f, "Inode size:         %d\n", sb->s_inode_size);
      }
      if (!e2p_is_null_uuid(sb->s_journal_uuid))
            fprintf(f, "Journal UUID:             %s\n",
                  e2p_uuid2str(sb->s_journal_uuid));
      if (sb->s_journal_inum)
            fprintf(f, "Journal inode:            %u\n",
                  sb->s_journal_inum);
      if (sb->s_journal_dev)
            fprintf(f, "Journal device:             0x%04x\n",
                  sb->s_journal_dev);
      if (sb->s_last_orphan)
            fprintf(f, "First orphan inode:       %u\n",
                  sb->s_last_orphan);
      if ((sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
          sb->s_def_hash_version)
            fprintf(f, "Default directory hash:   %s\n",
                  e2p_hash2string(sb->s_def_hash_version));
      if (!e2p_is_null_uuid(sb->s_hash_seed))
            fprintf(f, "Directory Hash Seed:      %s\n",
                  e2p_uuid2str(sb->s_hash_seed));
      if (sb->s_jnl_backup_type) {
            fprintf(f, "Journal backup:           ");
            switch (sb->s_jnl_backup_type) {
            case 1:
                  fprintf(f, "inode blocks\n");
                  break;
            default:
                  fprintf(f, "type %u\n", sb->s_jnl_backup_type);
            }
      }
}

void list_super (struct ext2_super_block * s)
{
      list_super2(s, stdout);
}


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