/*
* util.c --- miscellaneous utilities
*
* Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#ifdef __linux__
#include <sys/utsname.h>
#endif
#ifdef HAVE_CONIO_H
#undef HAVE_TERMIOS_H
#include <conio.h>
#define read_a_char() getch()
#else
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include "e2fsck.h"
extern e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */
#include <sys/time.h>
#include <sys/resource.h>
void fatal_error(e2fsck_t ctx, const char *msg)
{
if (msg)
fprintf (stderr, "e2fsck: %s\n", msg);
if (ctx->fs && ctx->fs->io) {
if (ctx->fs->io->magic == EXT2_ET_MAGIC_IO_CHANNEL)
io_channel_flush(ctx->fs->io);
else
fprintf(stderr, "e2fsck: io manager magic bad!\n");
}
ctx->flags |= E2F_FLAG_ABORT;
if (ctx->flags & E2F_FLAG_SETJMP_OK)
longjmp(ctx->abort_loc, 1);
exit(FSCK_ERROR);
}
void *e2fsck_allocate_memory(e2fsck_t ctx, unsigned int size,
const char *description)
{
void *ret;
char buf[256];
#ifdef DEBUG_ALLOCATE_MEMORY
printf("Allocating %u bytes for %s...\n", size, description);
#endif
ret = malloc(size);
if (!ret) {
sprintf(buf, "Can't allocate %s\n", description);
fatal_error(ctx, buf);
}
memset(ret, 0, size);
return ret;
}
char *string_copy(e2fsck_t ctx EXT2FS_ATTR((unused)),
const char *str, int len)
{
char *ret;
if (!str)
return NULL;
if (!len)
len = strlen(str);
ret = malloc(len+1);
if (ret) {
strncpy(ret, str, len);
ret[len] = 0;
}
return ret;
}
#ifndef HAVE_STRNLEN
/*
* Incredibly, libc5 doesn't appear to have strnlen. So we have to
* provide our own.
*/
int e2fsck_strnlen(const char * s, int count)
{
const char *cp = s;
while (count-- && *cp)
cp++;
return cp - s;
}
#endif
#ifndef HAVE_CONIO_H
static int read_a_char(void)
{
char c;
int r;
int fail = 0;
while(1) {
if (e2fsck_global_ctx &&
(e2fsck_global_ctx->flags & E2F_FLAG_CANCEL)) {
return 3;
}
r = read(0, &c, 1);
if (r == 1)
return c;
if (fail++ > 100)
break;
}
return EOF;
}
#endif
int ask_yn(const char * string, int def)
{
int c;
const char *defstr;
const char *short_yes = _("yY");
const char *short_no = _("nN");
#ifdef HAVE_TERMIOS_H
struct termios termios, tmp;
tcgetattr (0, &termios);
tmp = termios;
tmp.c_lflag &= ~(ICANON | ECHO);
tmp.c_cc[VMIN] = 1;
tmp.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tmp);
#endif
if (def == 1)
defstr = _(_("<y>"));
else if (def == 0)
defstr = _(_("<n>"));
else
defstr = _(" (y/n)");
printf("%s%s? ", string, defstr);
while (1) {
fflush (stdout);
if ((c = read_a_char()) == EOF)
break;
if (c == 3) {
#ifdef HAVE_TERMIOS_H
tcsetattr (0, TCSANOW, &termios);
#endif
if (e2fsck_global_ctx &&
e2fsck_global_ctx->flags & E2F_FLAG_SETJMP_OK) {
puts("\n");
longjmp(e2fsck_global_ctx->abort_loc, 1);
}
puts(_("cancelled!\n"));
return 0;
}
if (strchr(short_yes, (char) c)) {
def = 1;
break;
}
else if (strchr(short_no, (char) c)) {
def = 0;
break;
}
else if ((c == ' ' || c == '\n') && (def != -1))
break;
}
if (def)
puts(_("yes\n"));
else
puts (_("no\n"));
#ifdef HAVE_TERMIOS_H
tcsetattr (0, TCSANOW, &termios);
#endif
return def;
}
int ask (e2fsck_t ctx, const char * string, int def)
{
if (ctx->options & E2F_OPT_NO) {
printf (_("%s? no\n\n"), string);
return 0;
}
if (ctx->options & E2F_OPT_YES) {
printf (_("%s? yes\n\n"), string);
return 1;
}
if (ctx->options & E2F_OPT_PREEN) {
printf ("%s? %s\n\n", string, def ? _("yes") : _("no"));
return def;
}
return ask_yn(string, def);
}
void e2fsck_read_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
errcode_t retval;
const char *old_op;
if (ctx->invalid_bitmaps) {
com_err(ctx->program_name, 0,
_("e2fsck_read_bitmaps: illegal bitmap block(s) for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
old_op = ehandler_operation(_("reading inode and block bitmaps"));
retval = ext2fs_read_bitmaps(fs);
ehandler_operation(old_op);
if (retval) {
com_err(ctx->program_name, retval,
_("while retrying to read bitmaps for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
}
void e2fsck_write_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
errcode_t retval;
const char *old_op;
old_op = ehandler_operation(_("writing block and inode bitmaps"));
retval = ext2fs_write_bitmaps(fs);
ehandler_operation(old_op);
if (retval) {
com_err(ctx->program_name, retval,
_("while rewriting block and inode bitmaps for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
}
void preenhalt(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
if (!(ctx->options & E2F_OPT_PREEN))
return;
fprintf(stderr, _("\n\n%s: UNEXPECTED INCONSISTENCY; "
"RUN fsck MANUALLY.\n\t(i.e., without -a or -p options)\n"),
ctx->device_name);
ctx->flags |= E2F_FLAG_EXITING;
if (fs != NULL) {
fs->super->s_state |= EXT2_ERROR_FS;
ext2fs_mark_super_dirty(fs);
ext2fs_close(fs);
}
exit(FSCK_UNCORRECTED);
}
#ifdef RESOURCE_TRACK
void init_resource_track(struct resource_track *track, io_channel channel)
{
#ifdef HAVE_GETRUSAGE
struct rusage r;
#endif
io_stats io_start = 0;
track->brk_start = sbrk(0);
gettimeofday(&track->time_start, 0);
#ifdef HAVE_GETRUSAGE
#ifdef sun
memset(&r, 0, sizeof(struct rusage));
#endif
getrusage(RUSAGE_SELF, &r);
track->user_start = r.ru_utime;
track->system_start = r.ru_stime;
#else
track->user_start.tv_sec = track->user_start.tv_usec = 0;
track->system_start.tv_sec = track->system_start.tv_usec = 0;
#endif
track->bytes_read = 0;
track->bytes_written = 0;
if (channel && channel->manager && channel->manager->get_stats)
channel->manager->get_stats(channel, &io_start);
if (io_start) {
track->bytes_read = io_start->bytes_read;
track->bytes_written = io_start->bytes_written;
}
}
#ifdef __GNUC__
#define _INLINE_ __inline__
#else
#define _INLINE_
#endif
static _INLINE_ float timeval_subtract(struct timeval *tv1,
struct timeval *tv2)
{
return ((tv1->tv_sec - tv2->tv_sec) +
((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
}
void print_resource_track(e2fsck_t ctx, const char *desc,
struct resource_track *track, io_channel channel)
{
#ifdef HAVE_GETRUSAGE
struct rusage r;
#endif
#ifdef HAVE_MALLINFO
struct mallinfo malloc_info;
#endif
struct timeval time_end;
if ((desc && !(ctx->options & E2F_OPT_TIME2)) ||
(!desc && !(ctx->options & E2F_OPT_TIME)))
return;
e2fsck_clear_progbar(ctx);
gettimeofday(&time_end, 0);
if (desc)
printf("%s: ", desc);
#ifdef HAVE_MALLINFO
#define kbytes(x) (((unsigned long)(x) + 1023) / 1024)
malloc_info = mallinfo();
printf(_("Memory used: %luk/%luk (%luk/%luk), "),
kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
#else
printf(_("Memory used: %lu, "),
(unsigned long) (((char *) sbrk(0)) -
((char *) track->brk_start)));
#endif
#ifdef HAVE_GETRUSAGE
getrusage(RUSAGE_SELF, &r);
printf(_("time: %5.2f/%5.2f/%5.2f\n"),
timeval_subtract(&time_end, &track->time_start),
timeval_subtract(&r.ru_utime, &track->user_start),
timeval_subtract(&r.ru_stime, &track->system_start));
#else
printf(_("elapsed time: %6.3f\n"),
timeval_subtract(&time_end, &track->time_start));
#endif
#define mbytes(x) (((x) + 1048575) / 1048576)
if (channel && channel->manager && channel->manager->get_stats) {
io_stats delta = 0;
unsigned long long bytes_read = 0;
unsigned long long bytes_written = 0;
if (desc)
printf("%s: ", desc);
channel->manager->get_stats(channel, &delta);
if (delta) {
bytes_read = delta->bytes_read - track->bytes_read;
bytes_written = delta->bytes_written -
track->bytes_written;
}
printf("I/O read: %lluMB, write: %lluMB, rate: %.2fMB/s\n",
mbytes(bytes_read), mbytes(bytes_written),
(double)mbytes(bytes_read + bytes_written) /
timeval_subtract(&time_end, &track->time_start));
}
}
#endif /* RESOURCE_TRACK */
void e2fsck_read_inode(e2fsck_t ctx, unsigned long ino,
struct ext2_inode * inode, const char *proc)
{
int retval;
retval = ext2fs_read_inode(ctx->fs, ino, inode);
if (retval) {
com_err("ext2fs_read_inode", retval,
_("while reading inode %lu in %s"), ino, proc);
fatal_error(ctx, 0);
}
}
void e2fsck_read_inode_full(e2fsck_t ctx, unsigned long ino,
struct ext2_inode *inode, int bufsize,
const char *proc)
{
int retval;
retval = ext2fs_read_inode_full(ctx->fs, ino, inode, bufsize);
if (retval) {
com_err("ext2fs_read_inode_full", retval,
_("while reading inode %lu in %s"), ino, proc);
fatal_error(ctx, 0);
}
}
extern void e2fsck_write_inode_full(e2fsck_t ctx, unsigned long ino,
struct ext2_inode * inode, int bufsize,
const char *proc)
{
int retval;
retval = ext2fs_write_inode_full(ctx->fs, ino, inode, bufsize);
if (retval) {
com_err("ext2fs_write_inode", retval,
_("while writing inode %lu in %s"), ino, proc);
fatal_error(ctx, 0);
}
}
extern void e2fsck_write_inode(e2fsck_t ctx, unsigned long ino,
struct ext2_inode * inode, const char *proc)
{
int retval;
retval = ext2fs_write_inode(ctx->fs, ino, inode);
if (retval) {
com_err("ext2fs_write_inode", retval,
_("while writing inode %lu in %s"), ino, proc);
fatal_error(ctx, 0);
}
}
#ifdef MTRACE
void mtrace_print(char *mesg)
{
FILE *malloc_get_mallstream();
FILE *f = malloc_get_mallstream();
if (f)
fprintf(f, "============= %s\n", mesg);
}
#endif
blk_t get_backup_sb(e2fsck_t ctx, ext2_filsys fs, const char *name,
io_manager manager)
{
struct ext2_super_block *sb;
io_channel io = NULL;
void *buf = NULL;
int blocksize;
blk_t superblock, ret_sb = 8193;
if (fs && fs->super) {
ret_sb = (fs->super->s_blocks_per_group +
fs->super->s_first_data_block);
if (ctx) {
ctx->superblock = ret_sb;
ctx->blocksize = fs->blocksize;
}
return ret_sb;
}
if (ctx) {
if (ctx->blocksize) {
ret_sb = ctx->blocksize * 8;
if (ctx->blocksize == 1024)
ret_sb++;
ctx->superblock = ret_sb;
return ret_sb;
}
ctx->superblock = ret_sb;
ctx->blocksize = 1024;
}
if (!name || !manager)
goto cleanup;
if (manager->open(name, 0, &io) != 0)
goto cleanup;
if (ext2fs_get_mem(SUPERBLOCK_SIZE, &buf))
goto cleanup;
sb = (struct ext2_super_block *) buf;
for (blocksize = EXT2_MIN_BLOCK_SIZE;
blocksize <= EXT2_MAX_BLOCK_SIZE ; blocksize *= 2) {
superblock = blocksize*8;
if (blocksize == 1024)
superblock++;
io_channel_set_blksize(io, blocksize);
if (io_channel_read_blk(io, superblock,
-SUPERBLOCK_SIZE, buf))
continue;
#ifdef WORDS_BIGENDIAN
if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
ext2fs_swap_super(sb);
#endif
if ((sb->s_magic == EXT2_SUPER_MAGIC) &&
(EXT2_BLOCK_SIZE(sb) == blocksize)) {
ret_sb = superblock;
if (ctx) {
ctx->superblock = superblock;
ctx->blocksize = blocksize;
}
break;
}
}
cleanup:
if (io)
io_channel_close(io);
if (buf)
ext2fs_free_mem(&buf);
return (ret_sb);
}
/*
* Given a mode, return the ext2 file type
*/
int ext2_file_type(unsigned int mode)
{
if (LINUX_S_ISREG(mode))
return EXT2_FT_REG_FILE;
if (LINUX_S_ISDIR(mode))
return EXT2_FT_DIR;
if (LINUX_S_ISCHR(mode))
return EXT2_FT_CHRDEV;
if (LINUX_S_ISBLK(mode))
return EXT2_FT_BLKDEV;
if (LINUX_S_ISLNK(mode))
return EXT2_FT_SYMLINK;
if (LINUX_S_ISFIFO(mode))
return EXT2_FT_FIFO;
if (LINUX_S_ISSOCK(mode))
return EXT2_FT_SOCK;
return 0;
}
#define STRIDE_LENGTH 8
/*
* Helper function which zeros out _num_ blocks starting at _blk_. In
* case of an error, the details of the error is returned via _ret_blk_
* and _ret_count_ if they are non-NULL pointers. Returns 0 on
* success, and an error code on an error.
*
* As a special case, if the first argument is NULL, then it will
* attempt to free the static zeroizing buffer. (This is to keep
* programs that check for memory leaks happy.)
*/
errcode_t e2fsck_zero_blocks(ext2_filsys fs, blk_t blk, int num,
blk_t *ret_blk, int *ret_count)
{
int j, count, next_update, next_update_incr;
static char *buf;
errcode_t retval;
/* If fs is null, clean up the static buffer and return */
if (!fs) {
if (buf) {
free(buf);
buf = 0;
}
return 0;
}
/* Allocate the zeroizing buffer if necessary */
if (!buf) {
buf = malloc(fs->blocksize * STRIDE_LENGTH);
if (!buf) {
com_err("malloc", ENOMEM,
_("while allocating zeroizing buffer"));
exit(1);
}
memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
}
/* OK, do the write loop */
next_update = 0;
next_update_incr = num / 100;
if (next_update_incr < 1)
next_update_incr = 1;
for (j = 0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
count = num - j;
if (count > STRIDE_LENGTH)
count = STRIDE_LENGTH;
retval = io_channel_write_blk(fs->io, blk, count, buf);
if (retval) {
if (ret_count)
*ret_count = count;
if (ret_blk)
*ret_blk = blk;
return retval;
}
}
return 0;
}
/*
* Check to see if a filesystem is in /proc/filesystems.
* Returns 1 if found, 0 if not
*/
int fs_proc_check(const char *fs_name)
{
FILE *f;
char buf[80], *cp, *t;
f = fopen("/proc/filesystems", "r");
if (!f)
return (0);
while (!feof(f)) {
if (!fgets(buf, sizeof(buf), f))
break;
cp = buf;
if (!isspace(*cp)) {
while (*cp && !isspace(*cp))
cp++;
}
while (*cp && isspace(*cp))
cp++;
if ((t = strchr(cp, '\n')) != NULL)
*t = 0;
if ((t = strchr(cp, '\t')) != NULL)
*t = 0;
if ((t = strchr(cp, ' ')) != NULL)
*t = 0;
if (!strcmp(fs_name, cp)) {
fclose(f);
return (1);
}
}
fclose(f);
return (0);
}
/*
* Check to see if a filesystem is available as a module
* Returns 1 if found, 0 if not
*/
int check_for_modules(const char *fs_name)
{
#ifdef __linux__
struct utsname uts;
FILE *f;
char buf[1024], *cp, *t;
int i;
if (uname(&uts))
return (0);
snprintf(buf, sizeof(buf), "/lib/modules/%s/modules.dep", uts.release);
f = fopen(buf, "r");
if (!f)
return (0);
while (!feof(f)) {
if (!fgets(buf, sizeof(buf), f))
break;
if ((cp = strchr(buf, ':')) != NULL)
*cp = 0;
else
continue;
if ((cp = strrchr(buf, '/')) != NULL)
cp++;
else
cp = buf;
i = strlen(cp);
if (i > 3) {
t = cp + i - 3;
if (!strcmp(t, ".ko"))
*t = 0;
}
if (!strcmp(cp, fs_name)) {
fclose(f);
return (1);
}
}
fclose(f);
#endif /* __linux__ */
return (0);
}
/*
* Helper function that does the right thing if write returns a
* partial write, or an EGAIN/EINTR error.
*/
int write_all(int fd, char *buf, size_t count)
{
ssize_t ret;
int c = 0;
while (count > 0) {
ret = write(fd, buf, count);
if (ret < 0) {
if ((errno == EAGAIN) || (errno == EINTR))
continue;
return -1;
}
count -= ret;
buf += ret;
c += ret;
}
return c;
}