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e2fsprogs/misc/util.c

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/*
* 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%
*/
#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
#endif
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
#endif
#ifdef _WIN32
#define _POSIX
#define __USE_MINGW_ALARM
#endif
#include "config.h"
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_LINUX_MAJOR_H
#include <linux/major.h>
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <time.h>
#include "et/com_err.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "support/nls-enable.h"
#include "support/devname.h"
#include "blkid/blkid.h"
#include "util.h"
char *journal_location_string = NULL;
#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;
}
static jmp_buf alarm_env;
static void alarm_signal(int signal EXT2FS_ATTR((unused)))
{
longjmp(alarm_env, 1);
}
void proceed_question(int delay)
{
char buf[256];
const char *short_yes = _("yY");
const char *english_yes = "yY";
fflush(stdout);
fflush(stderr);
if (delay > 0) {
if (setjmp(alarm_env)) {
signal(SIGALRM, SIG_IGN);
printf("%s", _("<proceeding>\n"));
return;
}
signal(SIGALRM, alarm_signal);
printf(_("Proceed anyway (or wait %d seconds to proceed) ? (y,N) "),
delay);
alarm(delay);
} else
fputs(_("Proceed anyway? (y,N) "), stdout);
buf[0] = 0;
if (!fgets(buf, sizeof(buf), stdin) ||
strchr(_("nN"), buf[0]) ||
!(strchr(short_yes, buf[0]) ||
strchr(english_yes, buf[0]))) {
putc('\n', stdout);
exit(1);
}
signal(SIGALRM, SIG_IGN);
}
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) {
fprintf(stderr, _("%s is mounted; "), device);
if (force >= 2) {
fputs(_("mke2fs forced anyway. Hope /etc/mtab is "
"incorrect.\n"), stderr);
return;
}
abort_mke2fs:
fprintf(stderr, _("will not make a %s here!\n"), type);
exit(1);
}
if (mount_flags & EXT2_MF_BUSY) {
fprintf(stderr, _("%s is apparently in use by the system; "),
device);
if (force >= 2) {
fputs(_("mke2fs forced anyway.\n"), stderr);
return;
}
goto abort_mke2fs;
}
}
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 = get_devname(NULL, arg, NULL);
if (!journal_device) {
if (arg)
fprintf(stderr, _("\nCould not find "
"journal device matching %s\n"),
arg);
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, "fast_commit_size") == 0) {
if (!arg) {
journal_usage++;
continue;
}
journal_fc_size = strtoul(arg, &p, 0);
if (*p)
journal_usage++;
} else if (!strcmp(token, "location")) {
if (!arg) {
journal_usage++;
continue;
}
journal_location_string = strdup(arg);
} 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"
"\tlocation=<journal location>\n\n"
"The journal size must be between "
"1024 and 10240000 filesystem blocks.\n\n"), stderr);
free(buf);
exit(1);
}
free(buf);
}
static inline int jsize_to_blks(ext2_filsys fs, int size)
{
return (size * 1024) / (fs->blocksize / 1024);
}
/* Fast commit size is in KBs */
static inline int fcsize_to_blks(ext2_filsys fs, int size)
{
return (size * 1024) / (fs->blocksize);
}
/*
* 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.
*/
void figure_journal_size(struct ext2fs_journal_params *jparams,
int requested_j_size, int requested_fc_size, ext2_filsys fs)
{
int total_blocks, ret;
ret = ext2fs_get_journal_params(jparams, fs);
if (ret) {
fputs(_("\nFilesystem too small for a journal\n"), stderr);
return;
}
if (requested_j_size > 0 ||
(ext2fs_has_feature_fast_commit(fs->super) && requested_fc_size > 0)) {
if (requested_j_size > 0)
jparams->num_journal_blocks =
jsize_to_blks(fs, requested_j_size);
if (ext2fs_has_feature_fast_commit(fs->super) &&
requested_fc_size > 0)
jparams->num_fc_blocks =
fcsize_to_blks(fs, requested_fc_size);
else if (!ext2fs_has_feature_fast_commit(fs->super))
jparams->num_fc_blocks = 0;
total_blocks = jparams->num_journal_blocks + jparams->num_fc_blocks;
if (total_blocks < 1024 || total_blocks > 10240000) {
fprintf(stderr, _("\nThe total requested journal "
"size is %d blocks; it must be\n"
"between 1024 and 10240000 blocks. "
"Aborting.\n"),
total_blocks);
exit(1);
}
if ((unsigned int) total_blocks > ext2fs_free_blocks_count(fs->super) / 2) {
fputs(_("\nTotal journal size too big for filesystem.\n"),
stderr);
exit(1);
}
}
}
void print_check_message(int mnt, unsigned int check)
{
if (mnt < 0)
mnt = 0;
if (!mnt && !check)
return;
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"),
mnt, ((double) check) / (3600 * 24));
}
void dump_mmp_msg(struct mmp_struct *mmp, const char *msg)
{
if (msg)
printf("MMP check failed: %s\n", msg);
if (mmp) {
time_t t = mmp->mmp_time;
printf("MMP error info: node: %.*s, device: %.*s, updated: %s",
EXT2_LEN_STR(mmp->mmp_nodename),
EXT2_LEN_STR(mmp->mmp_bdevname), ctime(&t));
}
}
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