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e2fsprogs/misc/tune2fs.c
Theodore Ts'o c8c071a073 ChangeLog, e2image.c, mke2fs.c, mklost+found.c, tune2fs.c, util.c, uuidgen.c: 
e2image.c, mke2fs.c, mklost+found.c, tune2fs.c, util.c, uuidgen.c: Fix
  	gcc -Wall complaints, including one bug in tune2fs caused by a block
  	automatic shadowing version of the variable we really wanted to use,
  	which broke the logic testing to see if the filesystem was mounted.
ChangeLog, MCONFIG.in:
  (gcc-wall-new): Added new target which forgoes the make clean so we
  	only check the newly modified .c files.
2001-01-11 16:08:23 +00:00

620 lines
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/*
* tune2fs.c - Change the file system parameters on
* an unmounted second extended file system
*
* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
* Laboratoire MASI, Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* Copyright 1995, 1996, 1997 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
/*
* History:
* 93/06/01 - Creation
* 93/10/31 - Added the -c option to change the maximal mount counts
* 93/12/14 - Added -l flag to list contents of superblock
* M.J.E. Mol (marcel@duteca.et.tudelft.nl)
* F.W. ten Wolde (franky@duteca.et.tudelft.nl)
* 93/12/29 - Added the -e option to change errors behavior
* 94/02/27 - Ported to use the ext2fs library
* 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
*/
#include <fcntl.h>
#include <grp.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <linux/ext2_fs.h>
#include "ext2fs/ext2fs.h"
#include "et/com_err.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"
#include "util.h"
#include "../version.h"
#include "nls-enable.h"
const char * program_name = "tune2fs";
char * device_name;
char * new_label, *new_last_mounted, *new_UUID;
const char *journal_opts;
static int c_flag, C_flag, e_flag, g_flag, i_flag, l_flag, L_flag;
static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag;
static int print_label;
static int max_mount_count, mount_count, mount_flags;
static unsigned long interval, reserved_ratio, reserved_blocks;
static unsigned long resgid, resuid;
static unsigned short errors;
static int open_flag;
static char *features_cmd;
int journal_size, journal_flags;
char *journal_device;
static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
static void usage(void)
{
fprintf(stderr,
_("Usage: %s [-c max-mounts-count] [-e errors-behavior] "
"[-g group]\n"
"\t[-i interval[d|m|w]] [-j journal-options]\n"
"\t[-l] [-s sparse-flag] [-m reserved-blocks-percent]\n"
"\t[-r reserved-blocks-count] [-u user] [-C mount-count]\n"
"\t[-L volume-label] [-M last-mounted-dir] [-U UUID]\n"
"\t[-O [^]feature[,...]] device\n"), program_name);
exit (1);
}
static __u32 ok_features[3] = {
EXT3_FEATURE_COMPAT_HAS_JOURNAL, /* Compat */
EXT2_FEATURE_INCOMPAT_FILETYPE, /* Incompat */
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
};
/*
* Update the feature set as provided by the user.
*/
static void update_feature_set(ext2_filsys fs, char *features)
{
int sparse, old_sparse, filetype, old_filetype;
int journal, old_journal;
struct ext2_inode inode;
struct ext2_super_block *sb= fs->super;
errcode_t retval;
old_sparse = sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
old_filetype = sb->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_FILETYPE;
old_journal = sb->s_feature_compat &
EXT3_FEATURE_COMPAT_HAS_JOURNAL;
if (e2p_edit_feature(features, &sb->s_feature_compat,
ok_features)) {
fprintf(stderr, _("Invalid filesystem option set: %s\n"),
features);
exit(1);
}
sparse = sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
filetype = sb->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_FILETYPE;
journal = sb->s_feature_compat &
EXT3_FEATURE_COMPAT_HAS_JOURNAL;
if (old_journal && !journal) {
if ((mount_flags & EXT2_MF_MOUNTED) &&
!(mount_flags & EXT2_MF_READONLY)) {
fprintf(stderr,
_("The HAS_JOURNAL flag may only be "
"cleared when the filesystem is\n"
"unmounted or mounted "
"read-only.\n"));
exit(1);
}
if (sb->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_RECOVER) {
fprintf(stderr,
_("The NEEDS_RECOVERY flag is set. "
"Please run e2fsck before clearing\n"
"the HAS_JOURNAL flag.\n"));
exit(1);
}
/*
* Remove the immutable flag on the journal inode
*/
if (sb->s_journal_inum) {
retval = ext2fs_read_inode(fs, sb->s_journal_inum,
&inode);
if (retval) {
com_err(program_name, retval,
"while reading journal inode");
exit(1);
}
inode.i_flags &= ~EXT2_IMMUTABLE_FL;
retval = ext2fs_write_inode(fs, sb->s_journal_inum,
&inode);
if (retval) {
com_err(program_name, retval,
"while write journal inode");
exit(1);
}
}
}
if (journal && !old_journal) {
/*
* If adding a journal flag, let the create journal
* code below handle creating setting the flag and
* creating the journal. We supply a default size if
* necessary.
*/
if (!journal_opts)
journal_opts = "size=16";
sb->s_feature_compat &=~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
journal = old_journal;
}
if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
(sb->s_feature_compat || sb->s_feature_ro_compat ||
sb->s_feature_incompat))
ext2fs_update_dynamic_rev(fs);
if ((sparse != old_sparse) ||
(filetype != old_filetype) ||
(journal != old_journal)) {
sb->s_state &= ~EXT2_VALID_FS;
printf("\n%s\n", _(please_fsck));
}
ext2fs_mark_super_dirty(fs);
}
/*
* Add a journal to the filesystem.
*/
static void add_journal(ext2_filsys fs)
{
unsigned long journal_blocks;
errcode_t retval;
if (fs->super->s_feature_compat &
EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
fprintf(stderr, _("The filesystem already has a journal.\n"));
exit(1);
}
parse_journal_opts(journal_opts);
journal_blocks = journal_size * 1024 / (fs->blocksize / 1024);
if (journal_device) {
check_plausibility(journal_device);
check_mount(journal_device, 0, _("journal"));
printf(_("Creating journal on device %s: "),
journal_device);
retval = ext2fs_add_journal_device(fs, journal_device,
journal_blocks,
journal_flags);
if (retval) {
com_err (program_name, retval,
_("while trying to create journal on device %s"),
journal_device);
exit(1);
}
printf(_("done\n"));
} else if (journal_size) {
printf(_("Creating journal inode: "));
fflush(stdout);
retval = ext2fs_add_journal_inode(fs, journal_blocks,
journal_flags);
if (retval) {
printf("\n");
com_err(program_name, retval,
_("while trying to create journal"));
exit(1);
}
printf(_("done\n"));
/*
* If the filesystem wasn't mounted, we need to force
* the block group descriptors out.
*/
if ((mount_flags & EXT2_MF_MOUNTED) == 0)
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
}
}
/*
* Given argv[0], return the program name.
*/
static char *get_progname(char *argv_zero)
{
char *cp;
cp = strrchr(argv_zero, '/');
if (!cp )
return argv_zero;
else
return cp+1;
}
static void parse_e2label_options(int argc, char ** argv)
{
if ((argc < 2) || (argc > 3)) {
fprintf(stderr, _("Usage: e2label device [newlabel]\n"));
exit(1);
}
device_name = argv[1];
if (argc == 3) {
open_flag = EXT2_FLAG_RW;
L_flag = 1;
new_label = argv[2];
} else
print_label++;
}
static void parse_tune2fs_options(int argc, char **argv)
{
int c;
char * tmp;
struct group * gr;
struct passwd * pw;
fprintf (stderr, _("tune2fs %s, %s for EXT2 FS %s, %s\n"),
E2FSPROGS_VERSION, E2FSPROGS_DATE,
EXT2FS_VERSION, EXT2FS_DATE);
while ((c = getopt (argc, argv, "c:e:g:i:j:lm:r:s:u:C:L:M:O:U:")) != EOF)
switch (c)
{
case 'c':
max_mount_count = strtol (optarg, &tmp, 0);
if (*tmp || max_mount_count > 16000) {
com_err (program_name, 0,
_("bad mounts count - %s"),
optarg);
usage();
}
c_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'C':
mount_count = strtoul (optarg, &tmp, 0);
if (*tmp || mount_count > 16000) {
com_err (program_name, 0,
_("bad mounts count - %s"),
optarg);
usage();
}
C_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'e':
if (strcmp (optarg, "continue") == 0)
errors = EXT2_ERRORS_CONTINUE;
else if (strcmp (optarg, "remount-ro") == 0)
errors = EXT2_ERRORS_RO;
else if (strcmp (optarg, "panic") == 0)
errors = EXT2_ERRORS_PANIC;
else {
com_err (program_name, 0,
_("bad error behavior - %s"),
optarg);
usage();
}
e_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'g':
resgid = strtoul (optarg, &tmp, 0);
if (*tmp) {
gr = getgrnam (optarg);
if (gr == NULL)
tmp = optarg;
else {
resgid = gr->gr_gid;
*tmp =0;
}
}
if (*tmp) {
com_err (program_name, 0,
_("bad gid/group name - %s"),
optarg);
usage();
}
g_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'i':
interval = strtoul (optarg, &tmp, 0);
switch (*tmp) {
case 's':
tmp++;
break;
case '\0':
case 'd':
case 'D': /* days */
interval *= 86400;
if (*tmp != '\0')
tmp++;
break;
case 'm':
case 'M': /* months! */
interval *= 86400 * 30;
tmp++;
break;
case 'w':
case 'W': /* weeks */
interval *= 86400 * 7;
tmp++;
break;
}
if (*tmp || interval > (365 * 86400)) {
com_err (program_name, 0,
_("bad interval - %s"), optarg);
usage();
}
i_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'l':
l_flag = 1;
break;
case 'j':
journal_opts = optarg;
open_flag = EXT2_FLAG_RW;
break;
case 'L':
new_label = optarg;
L_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'm':
reserved_ratio = strtoul (optarg, &tmp, 0);
if (*tmp || reserved_ratio > 50) {
com_err (program_name, 0,
_("bad reserved block ratio - %s"),
optarg);
usage();
}
m_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'M':
new_last_mounted = optarg;
M_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'O':
features_cmd = optarg;
open_flag = EXT2_FLAG_RW;
break;
case 'r':
reserved_blocks = strtoul (optarg, &tmp, 0);
if (*tmp) {
com_err (program_name, 0,
_("bad reserved blocks count - %s"),
optarg);
usage();
}
r_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 's':
s_flag = atoi(optarg);
open_flag = EXT2_FLAG_RW;
break;
case 'u':
resuid = strtoul (optarg, &tmp, 0);
if (*tmp) {
pw = getpwnam (optarg);
if (pw == NULL)
tmp = optarg;
else {
resuid = pw->pw_uid;
*tmp = 0;
}
}
if (*tmp) {
com_err (program_name, 0,
_("bad uid/user name - %s"),
optarg);
usage();
}
u_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'U':
new_UUID = optarg;
U_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
default:
usage();
}
if (optind < argc - 1 || optind == argc)
usage();
if (!open_flag && !l_flag)
usage();
device_name = argv[optind];
}
int main (int argc, char ** argv)
{
errcode_t retval;
ext2_filsys fs;
struct ext2_super_block *sb;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
#endif
if (argc && *argv)
program_name = *argv;
initialize_ext2_error_table();
if (strcmp(get_progname(argv[0]), "e2label") == 0)
parse_e2label_options(argc, argv);
else
parse_tune2fs_options(argc, argv);
retval = ext2fs_open (device_name, open_flag, 0, 0,
unix_io_manager, &fs);
if (retval) {
com_err (program_name, retval, _("while trying to open %s"),
device_name);
printf(_("Couldn't find valid filesystem superblock.\n"));
exit(1);
}
sb = fs->super;
if (print_label) {
/* For e2label emulation */
printf("%.*s\n", (int) sizeof(sb->s_volume_name),
sb->s_volume_name);
exit(0);
}
retval = ext2fs_check_if_mounted(device_name, &mount_flags);
if (retval) {
com_err("ext2fs_check_if_mount", retval,
_("while determining whether %s is mounted."),
device_name);
exit(0);
}
/* Normally we only need to write out the superblock */
fs->flags |= EXT2_FLAG_SUPER_ONLY;
if (c_flag) {
sb->s_max_mnt_count = max_mount_count;
ext2fs_mark_super_dirty(fs);
printf (_("Setting maximal mount count to %d\n"),
max_mount_count);
}
if (C_flag) {
sb->s_mnt_count = mount_count;
ext2fs_mark_super_dirty(fs);
printf (_("Setting current mount count to %d\n"), mount_count);
}
if (e_flag) {
sb->s_errors = errors;
ext2fs_mark_super_dirty(fs);
printf (_("Setting error behavior to %d\n"), errors);
}
if (g_flag) {
sb->s_def_resgid = resgid;
ext2fs_mark_super_dirty(fs);
printf (_("Setting reserved blocks gid to %lu\n"), resgid);
}
if (i_flag) {
sb->s_checkinterval = interval;
ext2fs_mark_super_dirty(fs);
printf (_("Setting interval between check %lu seconds\n"), interval);
}
if (m_flag) {
sb->s_r_blocks_count = (sb->s_blocks_count / 100)
* reserved_ratio;
ext2fs_mark_super_dirty(fs);
printf (_("Setting reserved blocks percentage to %lu (%u blocks)\n"),
reserved_ratio, sb->s_r_blocks_count);
}
if (r_flag) {
if (reserved_blocks >= sb->s_blocks_count) {
com_err (program_name, 0,
_("reserved blocks count is too big (%ul)"),
reserved_blocks);
exit (1);
}
sb->s_r_blocks_count = reserved_blocks;
ext2fs_mark_super_dirty(fs);
printf (_("Setting reserved blocks count to %lu\n"),
reserved_blocks);
}
if (s_flag == 1) {
if (sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
fprintf(stderr, _("\nThe filesystem already"
" has sparse superblocks.\n"));
else {
sb->s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
sb->s_state &= ~EXT2_VALID_FS;
ext2fs_mark_super_dirty(fs);
printf(_("\nSparse superblock flag set. %s"),
_(please_fsck));
}
}
if (s_flag == 0) {
if (!(sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
fprintf(stderr, _("\nThe filesystem already"
" has sparse superblocks disabled.\n"));
else {
sb->s_feature_ro_compat &=
~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
sb->s_state &= ~EXT2_VALID_FS;
fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
ext2fs_mark_super_dirty(fs);
printf(_("\nSparse superblock flag cleared. %s"),
_(please_fsck));
}
}
if (u_flag) {
sb->s_def_resuid = resuid;
ext2fs_mark_super_dirty(fs);
printf (_("Setting reserved blocks uid to %lu\n"), resuid);
}
if (L_flag) {
if (strlen(new_label) > sizeof(sb->s_volume_name))
fprintf(stderr, _("Warning: label too "
"long, truncating.\n"));
memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
strncpy(sb->s_volume_name, new_label,
sizeof(sb->s_volume_name));
ext2fs_mark_super_dirty(fs);
}
if (M_flag) {
memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
strncpy(sb->s_last_mounted, new_last_mounted,
sizeof(sb->s_last_mounted));
ext2fs_mark_super_dirty(fs);
}
if (features_cmd)
update_feature_set(fs, features_cmd);
if (journal_opts)
add_journal(fs);
if (U_flag) {
if (strcasecmp(new_UUID, "null") == 0) {
uuid_clear(sb->s_uuid);
} else if (strcasecmp(new_UUID, "time") == 0) {
uuid_generate_time(sb->s_uuid);
} else if (strcasecmp(new_UUID, "random") == 0) {
uuid_generate(sb->s_uuid);
} else if (uuid_parse(new_UUID, sb->s_uuid)) {
com_err(program_name, 0, _("Invalid UUID format\n"));
exit(1);
}
ext2fs_mark_super_dirty(fs);
}
if (l_flag)
list_super (sb);
ext2fs_close (fs);
exit (0);
}
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