mirror of
https://github.com/sheumann/hush.git
synced 2024-11-19 08:31:11 +00:00
268 lines
6.8 KiB
C
268 lines
6.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* util.c --- helper functions used by tune2fs and mke2fs
|
|
*
|
|
* Copyright 1995, 1996, 1997, 1998, 1999, 2000 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 <string.h>
|
|
#include <errno.h>
|
|
#include <linux/major.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "e2fsbb.h"
|
|
#include "e2p/e2p.h"
|
|
#include "ext2fs/ext2_fs.h"
|
|
#include "ext2fs/ext2fs.h"
|
|
#include "blkid/blkid.h"
|
|
#include "util.h"
|
|
|
|
void proceed_question(void)
|
|
{
|
|
fputs("Proceed anyway? (y,n) ", stdout);
|
|
if (bb_ask_confirmation() == 0)
|
|
exit(1);
|
|
}
|
|
|
|
void check_plausibility(const char *device, int force)
|
|
{
|
|
int val;
|
|
struct stat s;
|
|
val = stat(device, &s);
|
|
if (force)
|
|
return;
|
|
if(val == -1)
|
|
bb_perror_msg_and_die("cannot stat %s", device);
|
|
if (!S_ISBLK(s.st_mode)) {
|
|
printf("%s is not a block special device.\n", device);
|
|
proceed_question();
|
|
return;
|
|
}
|
|
|
|
#ifdef HAVE_LINUX_MAJOR_H
|
|
#ifndef MAJOR
|
|
#define MAJOR(dev) ((dev)>>8)
|
|
#define MINOR(dev) ((dev) & 0xff)
|
|
#endif
|
|
#ifndef SCSI_BLK_MAJOR
|
|
#ifdef SCSI_DISK0_MAJOR
|
|
#ifdef SCSI_DISK8_MAJOR
|
|
#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
|
|
((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
|
|
((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
|
|
#else
|
|
#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
|
|
((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
|
|
#endif /* defined(SCSI_DISK8_MAJOR) */
|
|
#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
|
|
#else
|
|
#define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
|
|
#endif /* defined(SCSI_DISK0_MAJOR) */
|
|
#endif /* defined(SCSI_BLK_MAJOR) */
|
|
if (((MAJOR(s.st_rdev) == HD_MAJOR &&
|
|
MINOR(s.st_rdev)%64 == 0) ||
|
|
(SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
|
|
MINOR(s.st_rdev)%16 == 0))) {
|
|
printf("%s is entire device, not just one partition!\n", device);
|
|
proceed_question();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void check_mount(const char *device, int force, const char *type)
|
|
{
|
|
errcode_t retval;
|
|
int mount_flags;
|
|
|
|
retval = ext2fs_check_if_mounted(device, &mount_flags);
|
|
if (retval) {
|
|
bb_error_msg("cannot determine if %s is mounted", device);
|
|
return;
|
|
}
|
|
if (mount_flags & EXT2_MF_MOUNTED) {
|
|
bb_error_msg("%s is mounted !", device);
|
|
force_check:
|
|
if (force)
|
|
bb_error_msg("badblocks forced anyways");
|
|
else
|
|
bb_error_msg_and_die("it's not safe to run badblocks!");
|
|
}
|
|
|
|
if (mount_flags & EXT2_MF_BUSY) {
|
|
bb_error_msg("%s is apparently in use by the system", device);
|
|
goto force_check;
|
|
}
|
|
|
|
}
|
|
|
|
void parse_journal_opts(char **journal_device, int *journal_flags,
|
|
int *journal_size, const char *opts)
|
|
{
|
|
char *buf, *token, *next, *p, *arg;
|
|
int journal_usage = 0;
|
|
buf = xstrdup(opts);
|
|
for (token = buf; token && *token; token = next) {
|
|
p = strchr(token, ',');
|
|
next = 0;
|
|
if (p) {
|
|
*p = 0;
|
|
next = p+1;
|
|
}
|
|
arg = strchr(token, '=');
|
|
if (arg) {
|
|
*arg = 0;
|
|
arg++;
|
|
}
|
|
if (strcmp(token, "device") == 0) {
|
|
*journal_device = blkid_get_devname(NULL, arg, NULL);
|
|
if (!journal_device) {
|
|
journal_usage++;
|
|
continue;
|
|
}
|
|
} else if (strcmp(token, "size") == 0) {
|
|
if (!arg) {
|
|
journal_usage++;
|
|
continue;
|
|
}
|
|
(*journal_size) = strtoul(arg, &p, 0);
|
|
if (*p)
|
|
journal_usage++;
|
|
} else if (strcmp(token, "v1_superblock") == 0) {
|
|
(*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
|
|
continue;
|
|
} else
|
|
journal_usage++;
|
|
}
|
|
if (journal_usage)
|
|
bb_error_msg_and_die(
|
|
"\nBad journal options specified.\n\n"
|
|
"Journal options are separated by commas, "
|
|
"and may take an argument which\n"
|
|
"\tis set off by an equals ('=') sign.\n\n"
|
|
"Valid journal options are:\n"
|
|
"\tsize=<journal size in megabytes>\n"
|
|
"\tdevice=<journal device>\n\n"
|
|
"The journal size must be between "
|
|
"1024 and 102400 filesystem blocks.\n\n");
|
|
}
|
|
|
|
/*
|
|
* Determine the number of journal blocks to use, either via
|
|
* user-specified # of megabytes, or via some intelligently selected
|
|
* defaults.
|
|
*
|
|
* Find a reasonable journal file size (in blocks) given the number of blocks
|
|
* in the filesystem. For very small filesystems, it is not reasonable to
|
|
* have a journal that fills more than half of the filesystem.
|
|
*/
|
|
int figure_journal_size(int size, ext2_filsys fs)
|
|
{
|
|
blk_t j_blocks;
|
|
|
|
if (fs->super->s_blocks_count < 2048) {
|
|
bb_error_msg("Filesystem too small for a journal");
|
|
return 0;
|
|
}
|
|
|
|
if (size >= 0) {
|
|
j_blocks = size * 1024 / (fs->blocksize / 1024);
|
|
if (j_blocks < 1024 || j_blocks > 102400)
|
|
bb_error_msg_and_die("\nThe requested journal "
|
|
"size is %d blocks;\n it must be "
|
|
"between 1024 and 102400 blocks; Aborting",
|
|
j_blocks);
|
|
if (j_blocks > fs->super->s_free_blocks_count)
|
|
bb_error_msg_and_die("Journal size too big for filesystem");
|
|
return j_blocks;
|
|
}
|
|
|
|
if (fs->super->s_blocks_count < 32768)
|
|
j_blocks = 1024;
|
|
else if (fs->super->s_blocks_count < 256*1024)
|
|
j_blocks = 4096;
|
|
else if (fs->super->s_blocks_count < 512*1024)
|
|
j_blocks = 8192;
|
|
else if (fs->super->s_blocks_count < 1024*1024)
|
|
j_blocks = 16384;
|
|
else
|
|
j_blocks = 32768;
|
|
|
|
return j_blocks;
|
|
}
|
|
|
|
void print_check_message(ext2_filsys fs)
|
|
{
|
|
printf("This filesystem will be automatically "
|
|
"checked every %d mounts or\n"
|
|
"%g days, whichever comes first. "
|
|
"Use tune2fs -c or -i to override.\n",
|
|
fs->super->s_max_mnt_count,
|
|
(double)fs->super->s_checkinterval / (3600 * 24));
|
|
}
|
|
|
|
void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
|
|
{
|
|
errcode_t retval;
|
|
ext2_filsys jfs;
|
|
io_manager io_ptr;
|
|
|
|
check_plausibility(journal_device, force);
|
|
check_mount(journal_device, force, "journal");
|
|
io_ptr = unix_io_manager;
|
|
retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
|
|
EXT2_FLAG_JOURNAL_DEV_OK, 0,
|
|
fs->blocksize, io_ptr, &jfs);
|
|
if (retval)
|
|
bb_error_msg_and_die("cannot journal device %s", journal_device);
|
|
if(!quiet)
|
|
printf("Adding journal to device %s: ", journal_device);
|
|
fflush(stdout);
|
|
retval = ext2fs_add_journal_device(fs, jfs);
|
|
if(retval)
|
|
bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
|
|
if(!quiet)
|
|
puts("done");
|
|
ext2fs_close(jfs);
|
|
}
|
|
|
|
void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
|
|
{
|
|
unsigned long journal_blocks;
|
|
errcode_t retval;
|
|
|
|
journal_blocks = figure_journal_size(journal_size, fs);
|
|
if (!journal_blocks) {
|
|
fs->super->s_feature_compat &=
|
|
~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
|
|
return;
|
|
}
|
|
if(!quiet)
|
|
printf("Creating journal (%ld blocks): ", journal_blocks);
|
|
fflush(stdout);
|
|
retval = ext2fs_add_journal_inode(fs, journal_blocks,
|
|
journal_flags);
|
|
if(retval)
|
|
bb_error_msg_and_die("cannot create journal");
|
|
if(!quiet)
|
|
puts("done");
|
|
}
|
|
|
|
char *e2fs_set_sbin_path(void)
|
|
{
|
|
char *oldpath = getenv("PATH");
|
|
/* Update our PATH to include /sbin */
|
|
#define PATH_SET "/sbin"
|
|
if (oldpath)
|
|
oldpath = xasprintf("%s:%s", PATH_SET, oldpath);
|
|
else
|
|
oldpath = PATH_SET;
|
|
putenv (oldpath);
|
|
return oldpath;
|
|
}
|