ls.c revision 6b226c3de2aea0ae3a44a56d0322ba3a7f561886 
1/*
2 * ls.c			- List the contents of an ext2fs superblock
3 *
4 * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
5 *                                 Laboratoire MASI, Institut Blaise Pascal
6 *                                 Universite Pierre et Marie Curie (Paris VI)
7 *
8 * Copyright (C) 1995, 1996, 1997  Theodore Ts'o <tytso@mit.edu>
9 *
10 * This file can be redistributed under the terms of the GNU Library General
11 * Public License
12 */
13
14#include <stdio.h>
15#include <stdlib.h>
16#include <sys/types.h>
17#include <string.h>
18#include <grp.h>
19#include <pwd.h>
20#include <time.h>
21
22#include "e2p.h"
23
24static void print_user (unsigned short uid, FILE *f)
25{
26	struct passwd *pw;
27
28	fprintf(f, "%u ", uid);
29	pw = getpwuid (uid);
30	if (pw == NULL)
31		fprintf(f, "(user unknown)\n");
32	else
33		fprintf(f, "(user %s)\n", pw->pw_name);
34}
35
36static void print_group (unsigned short gid, FILE *f)
37{
38	struct group *gr;
39
40	fprintf(f, "%u ", gid);
41	gr = getgrgid (gid);
42	if (gr == NULL)
43		fprintf(f, "(group unknown)\n");
44	else
45		fprintf(f, "(group %s)\n", gr->gr_name);
46}
47
48#define MONTH_INT (86400 * 30)
49#define WEEK_INT (86400 * 7)
50#define DAY_INT	(86400)
51#define HOUR_INT (60 * 60)
52#define MINUTE_INT (60)
53
54static const char *interval_string(unsigned int secs)
55{
56	static char buf[256], tmp[80];
57	int		hr, min, num;
58
59	buf[0] = 0;
60
61	if (secs == 0)
62		return "<none>";
63
64	if (secs >= MONTH_INT) {
65		num = secs / MONTH_INT;
66		secs -= num*MONTH_INT;
67		sprintf(buf, "%d month%s", num, (num>1) ? "s" : "");
68	}
69	if (secs >= WEEK_INT) {
70		num = secs / WEEK_INT;
71		secs -= num*WEEK_INT;
72		sprintf(tmp, "%s%d week%s", buf[0] ? ", " : "",
73			num, (num>1) ? "s" : "");
74		strcat(buf, tmp);
75	}
76	if (secs >= DAY_INT) {
77		num = secs / DAY_INT;
78		secs -= num*DAY_INT;
79		sprintf(tmp, "%s%d day%s", buf[0] ? ", " : "",
80			num, (num>1) ? "s" : "");
81		strcat(buf, tmp);
82	}
83	if (secs > 0) {
84		hr = secs / HOUR_INT;
85		secs -= hr*HOUR_INT;
86		min = secs / MINUTE_INT;
87		secs -= min*MINUTE_INT;
88		sprintf(tmp, "%s%d:%02d:%02d", buf[0] ? ", " : "",
89			hr, min, secs);
90		strcat(buf, tmp);
91	}
92	return buf;
93}
94
95static void print_features(struct ext2_super_block * s, FILE *f)
96{
97#ifdef EXT2_DYNAMIC_REV
98	int	i, j, printed=0;
99	__u32	*mask = &s->s_feature_compat, m;
100
101	fprintf(f, "Filesystem features:     ");
102	for (i=0; i <3; i++,mask++) {
103		for (j=0,m=1; j < 32; j++, m<<=1) {
104			if (*mask & m) {
105				fprintf(f, " %s", e2p_feature2string(i, m));
106				printed++;
107			}
108		}
109	}
110	if (printed == 0)
111		fprintf(f, " (none)");
112	fprintf(f, "\n");
113#endif
114}
115
116static void print_mntopts(struct ext2_super_block * s, FILE *f)
117{
118#ifdef EXT2_DYNAMIC_REV
119	int	i, printed=0;
120	__u32	mask = s->s_default_mount_opts, m;
121
122	fprintf(f, "Default mount options:   ");
123	if (mask & EXT3_DEFM_JMODE) {
124		fprintf(f, " %s", e2p_mntopt2string(mask & EXT3_DEFM_JMODE));
125		printed++;
126	}
127	for (i=0,m=1; i < 32; i++, m<<=1) {
128		if (m & EXT3_DEFM_JMODE)
129			continue;
130		if (mask & m) {
131			fprintf(f, " %s", e2p_mntopt2string(m));
132			printed++;
133		}
134	}
135	if (printed == 0)
136		fprintf(f, " (none)");
137	fprintf(f, "\n");
138#endif
139}
140
141static void print_super_flags(struct ext2_super_block * s, FILE *f)
142{
143	int	flags_found = 0;
144
145	if (s->s_flags == 0)
146		return;
147
148	fputs("Filesystem flags:         ", f);
149	if (s->s_flags & EXT2_FLAGS_SIGNED_HASH) {
150		fputs("signed_directory_hash ", f);
151		flags_found++;
152	}
153	if (s->s_flags & EXT2_FLAGS_UNSIGNED_HASH) {
154		fputs("unsigned_directory_hash ", f);
155		flags_found++;
156	}
157	if (s->s_flags & EXT2_FLAGS_TEST_FILESYS) {
158		fputs("test_filesystem ", f);
159		flags_found++;
160	}
161	if (flags_found)
162		fputs("\n", f);
163	else
164		fputs("(none)\n", f);
165}
166
167
168#ifndef EXT2_INODE_SIZE
169#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode)
170#endif
171
172#ifndef EXT2_GOOD_OLD_REV
173#define EXT2_GOOD_OLD_REV 0
174#endif
175
176void list_super2(struct ext2_super_block * sb, FILE *f)
177{
178	int inode_blocks_per_group;
179	char buf[80], *str;
180	time_t	tm;
181
182	inode_blocks_per_group = (((sb->s_inodes_per_group *
183				    EXT2_INODE_SIZE(sb)) +
184				   EXT2_BLOCK_SIZE(sb) - 1) /
185				  EXT2_BLOCK_SIZE(sb));
186	if (sb->s_volume_name[0]) {
187		memset(buf, 0, sizeof(buf));
188		strncpy(buf, sb->s_volume_name, sizeof(sb->s_volume_name));
189	} else
190		strcpy(buf, "<none>");
191	fprintf(f, "Filesystem volume name:   %s\n", buf);
192	if (sb->s_last_mounted[0]) {
193		memset(buf, 0, sizeof(buf));
194		strncpy(buf, sb->s_last_mounted, sizeof(sb->s_last_mounted));
195	} else
196		strcpy(buf, "<not available>");
197	fprintf(f, "Last mounted on:          %s\n", buf);
198	fprintf(f, "Filesystem UUID:          %s\n", e2p_uuid2str(sb->s_uuid));
199	fprintf(f, "Filesystem magic number:  0x%04X\n", sb->s_magic);
200	fprintf(f, "Filesystem revision #:    %d", sb->s_rev_level);
201	if (sb->s_rev_level == EXT2_GOOD_OLD_REV) {
202		fprintf(f, " (original)\n");
203#ifdef EXT2_DYNAMIC_REV
204	} else if (sb->s_rev_level == EXT2_DYNAMIC_REV) {
205		fprintf(f, " (dynamic)\n");
206#endif
207	} else
208		fprintf(f, " (unknown)\n");
209	print_features(sb, f);
210	print_super_flags(sb, f);
211	print_mntopts(sb, f);
212	fprintf(f, "Filesystem state:        ");
213	print_fs_state (f, sb->s_state);
214	fprintf(f, "\n");
215	fprintf(f, "Errors behavior:          ");
216	print_fs_errors(f, sb->s_errors);
217	fprintf(f, "\n");
218	str = e2p_os2string(sb->s_creator_os);
219	fprintf(f, "Filesystem OS type:       %s\n", str);
220	free(str);
221	fprintf(f, "Inode count:              %u\n", sb->s_inodes_count);
222	fprintf(f, "Block count:              %u\n", sb->s_blocks_count);
223	fprintf(f, "Reserved block count:     %u\n", sb->s_r_blocks_count);
224	fprintf(f, "Free blocks:              %u\n", sb->s_free_blocks_count);
225	fprintf(f, "Free inodes:              %u\n", sb->s_free_inodes_count);
226	fprintf(f, "First block:              %u\n", sb->s_first_data_block);
227	fprintf(f, "Block size:               %u\n", EXT2_BLOCK_SIZE(sb));
228	fprintf(f, "Fragment size:            %u\n", EXT2_FRAG_SIZE(sb));
229	if (sb->s_reserved_gdt_blocks)
230		fprintf(f, "Reserved GDT blocks:      %u\n",
231			sb->s_reserved_gdt_blocks);
232	fprintf(f, "Blocks per group:         %u\n", sb->s_blocks_per_group);
233	fprintf(f, "Fragments per group:      %u\n", sb->s_frags_per_group);
234	fprintf(f, "Inodes per group:         %u\n", sb->s_inodes_per_group);
235	fprintf(f, "Inode blocks per group:   %u\n", inode_blocks_per_group);
236	if (sb->s_raid_stride)
237		fprintf(f, "Raid stride:              %u\n",
238			sb->s_raid_stride);
239	if (sb->s_raid_stripe_width)
240		fprintf(f, "Raid stripe width:        %u\n",
241			sb->s_raid_stripe_width);
242	if (sb->s_first_meta_bg)
243		fprintf(f, "First meta block group:   %u\n",
244			sb->s_first_meta_bg);
245	if (sb->s_mkfs_time) {
246		tm = sb->s_mkfs_time;
247		fprintf(f, "Filesystem created:       %s", ctime(&tm));
248	}
249	tm = sb->s_mtime;
250	fprintf(f, "Last mount time:          %s",
251		sb->s_mtime ? ctime(&tm) : "n/a\n");
252	tm = sb->s_wtime;
253	fprintf(f, "Last write time:          %s", ctime(&tm));
254	fprintf(f, "Mount count:              %u\n", sb->s_mnt_count);
255	fprintf(f, "Maximum mount count:      %d\n", sb->s_max_mnt_count);
256	tm = sb->s_lastcheck;
257	fprintf(f, "Last checked:             %s", ctime(&tm));
258	fprintf(f, "Check interval:           %u (%s)\n", sb->s_checkinterval,
259	       interval_string(sb->s_checkinterval));
260	if (sb->s_checkinterval)
261	{
262		time_t next;
263
264		next = sb->s_lastcheck + sb->s_checkinterval;
265		fprintf(f, "Next check after:         %s", ctime(&next));
266	}
267	fprintf(f, "Reserved blocks uid:      ");
268	print_user(sb->s_def_resuid, f);
269	fprintf(f, "Reserved blocks gid:      ");
270	print_group(sb->s_def_resgid, f);
271	if (sb->s_rev_level >= EXT2_DYNAMIC_REV) {
272		fprintf(f, "First inode:              %d\n", sb->s_first_ino);
273		fprintf(f, "Inode size:		  %d\n", sb->s_inode_size);
274	}
275	if (!e2p_is_null_uuid(sb->s_journal_uuid))
276		fprintf(f, "Journal UUID:             %s\n",
277			e2p_uuid2str(sb->s_journal_uuid));
278	if (sb->s_journal_inum)
279		fprintf(f, "Journal inode:            %u\n",
280			sb->s_journal_inum);
281	if (sb->s_journal_dev)
282		fprintf(f, "Journal device:	          0x%04x\n",
283			sb->s_journal_dev);
284	if (sb->s_last_orphan)
285		fprintf(f, "First orphan inode:       %u\n",
286			sb->s_last_orphan);
287	if ((sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
288	    sb->s_def_hash_version)
289		fprintf(f, "Default directory hash:   %s\n",
290			e2p_hash2string(sb->s_def_hash_version));
291	if (!e2p_is_null_uuid(sb->s_hash_seed))
292		fprintf(f, "Directory Hash Seed:      %s\n",
293			e2p_uuid2str(sb->s_hash_seed));
294	if (sb->s_jnl_backup_type) {
295		fprintf(f, "Journal backup:           ");
296		switch (sb->s_jnl_backup_type) {
297		case 1:
298			fprintf(f, "inode blocks\n");
299			break;
300		default:
301			fprintf(f, "type %u\n", sb->s_jnl_backup_type);
302		}
303	}
304}
305
306void list_super (struct ext2_super_block * s)
307{
308	list_super2(s, stdout);
309}
310
311