e2fsprogs/misc/util.c

287 lines
6.5 KiB
C

/*
* 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%
*/
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#include <stdio.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_LINUX_MAJOR_H
#include <linux/major.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include "et/com_err.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "nls-enable.h"
#include "blkid/blkid.h"
#include "util.h"
#ifndef HAVE_STRCASECMP
int strcasecmp (char *s1, char *s2)
{
while (*s1 && *s2) {
int ch1 = *s1++, ch2 = *s2++;
if (isupper (ch1))
ch1 = tolower (ch1);
if (isupper (ch2))
ch2 = tolower (ch2);
if (ch1 != ch2)
return ch1 - ch2;
}
return *s1 ? 1 : *s2 ? -1 : 0;
}
#endif
/*
* Given argv[0], return the program name.
*/
char *get_progname(char *argv_zero)
{
char *cp;
cp = strrchr(argv_zero, '/');
if (!cp )
return argv_zero;
else
return cp+1;
}
void proceed_question(void)
{
char buf[256];
const char *short_yes = _("yY");
fflush(stdout);
fflush(stderr);
fputs(_("Proceed anyway? (y,n) "), stdout);
buf[0] = 0;
fgets(buf, sizeof(buf), stdin);
if (strchr(short_yes, buf[0]) == 0)
exit(1);
}
void check_plausibility(const char *device)
{
int val;
#ifdef HAVE_OPEN64
struct stat64 s;
val = stat64(device, &s);
#else
struct stat s;
val = stat(device, &s);
#endif
if(val == -1) {
fprintf(stderr, _("Could not stat %s --- %s\n"),
device, error_message(errno));
if (errno == ENOENT)
fputs(_("\nThe device apparently does not exist; "
"did you specify it correctly?\n"), stderr);
exit(1);
}
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
/* On FreeBSD, all disk devices are character specials */
if (!S_ISBLK(s.st_mode) && !S_ISCHR(s.st_mode))
#else
if (!S_ISBLK(s.st_mode))
#endif
{
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) {
com_err("ext2fs_check_if_mount", retval,
_("while determining whether %s is mounted."),
device);
return;
}
if (!(mount_flags & EXT2_MF_MOUNTED))
return;
fprintf(stderr, _("%s is mounted; "), device);
if (force) {
fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
"incorrect.\n"), stderr);
} else {
fprintf(stderr, _("will not make a %s here!\n"), type);
exit(1);
}
}
void parse_journal_opts(const char *opts)
{
char *buf, *token, *next, *p, *arg;
int len;
int journal_usage = 0;
len = strlen(opts);
buf = malloc(len+1);
if (!buf) {
fputs(_("Couldn't allocate memory to parse journal "
"options!\n"), stderr);
exit(1);
}
strcpy(buf, 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 0
printf("Journal option=%s, argument=%s\n", token,
arg ? arg : "NONE");
#endif
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) {
fputs(_("\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"), stderr);
exit(1);
}
}
/*
* 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) {
fputs(_("\nFilesystem too small for a journal\n"), stderr);
return 0;
}
if (size >= 0) {
j_blocks = size * 1024 / (fs->blocksize / 1024);
if (j_blocks < 1024 || j_blocks > 102400) {
fprintf(stderr, _("\nThe requested journal "
"size is %d blocks; it must be\n"
"between 1024 and 102400 blocks. "
"Aborting.\n"),
j_blocks);
exit(1);
}
if (j_blocks > fs->super->s_free_blocks_count) {
fputs(_("\nJournal size too big for filesystem.\n"),
stderr);
exit(1);
}
return j_blocks;
}
if (fs->super->s_blocks_count < 32768)
j_blocks = 1024;
else if (fs->super->s_blocks_count < 262144)
j_blocks = 4096;
else
j_blocks = 8192;
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));
}