[thirdparty/e2fsprogs.git] / e2fsck / util.c

/*
 * 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;
}
Commit	Line	Data
3839e657 TT	1	/*
3839e657 TT	2	* util.c --- miscellaneous utilities
efc6f628	3	*
21c84b71 TT	4	* Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
	5	*
	6	* %Begin-Header%
	7	* This file may be redistributed under the terms of the GNU Public
	8	* License.
	9	* %End-Header%
3839e657 TT	10	*/
	11
	12	#include <stdlib.h>
80875db5	13	#include <stdio.h>
3839e657 TT	14	#include <unistd.h>
	15	#include <string.h>
	16	#include <ctype.h>
80875db5 TT	17	#ifdef __linux__
	18	#include <sys/utsname.h>
	19	#endif
9ecd8bec TT	20
	21	#ifdef HAVE_CONIO_H
	22	#undef HAVE_TERMIOS_H
	23	#include <conio.h>
e6597048	24	#define read_a_char() getch()
9ecd8bec TT	25	#else
9ecd8bec TT	26	#ifdef HAVE_TERMIOS_H
3839e657	27	#include <termios.h>
9ecd8bec TT	28	#endif
	29	#endif
	30
4a9f5936 TT	31	#ifdef HAVE_MALLOC_H
	32	#include <malloc.h>
	33	#endif
3839e657	34
49a7360b JS	35	#ifdef HAVE_ERRNO_H
	36	#include <errno.h>
	37	#endif
	38
3839e657 TT	39	#include "e2fsck.h"
3839e657 TT	40
aa75eccc	41	extern e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */
542867fb	42
50e1e10f TT	43	#include <sys/time.h>
	44	#include <sys/resource.h>
	45
f8188fff	46	void fatal_error(e2fsck_t ctx, const char *msg)
3839e657	47	{
efc6f628	48	if (msg)
1b6bf175	49	fprintf (stderr, "e2fsck: %s\n", msg);
58a75177	50	if (ctx->fs && ctx->fs->io) {
e39ac922	51	if (ctx->fs->io->magic == EXT2_ET_MAGIC_IO_CHANNEL)
58a75177 TT	52	io_channel_flush(ctx->fs->io);
	53	else
	54	fprintf(stderr, "e2fsck: io manager magic bad!\n");
	55	}
f8188fff TT	56	ctx->flags \|= E2F_FLAG_ABORT;
	57	if (ctx->flags & E2F_FLAG_SETJMP_OK)
	58	longjmp(ctx->abort_loc, 1);
3839e657 TT	59	exit(FSCK_ERROR);
	60	}
	61
f8188fff TT	62	void *e2fsck_allocate_memory(e2fsck_t ctx, unsigned int size,
f8188fff TT	63	const char *description)
3839e657 TT	64	{
	65	void *ret;
	66	char buf[256];
	67
	68	#ifdef DEBUG_ALLOCATE_MEMORY
611378fe	69	printf("Allocating %u bytes for %s...\n", size, description);
3839e657 TT	70	#endif
	71	ret = malloc(size);
	72	if (!ret) {
7f88b043	73	sprintf(buf, "Can't allocate %s\n", description);
f8188fff	74	fatal_error(ctx, buf);
3839e657 TT	75	}
	76	memset(ret, 0, size);
	77	return ret;
	78	}
	79
efc6f628	80	char *string_copy(e2fsck_t ctx EXT2FS_ATTR((unused)),
54434927	81	const char *str, int len)
f364093b TT	82	{
f364093b TT	83	char *ret;
efc6f628	84
f364093b TT	85	if (!str)
	86	return NULL;
	87	if (!len)
	88	len = strlen(str);
	89	ret = malloc(len+1);
	90	if (ret) {
	91	strncpy(ret, str, len);
	92	ret[len] = 0;
	93	}
	94	return ret;
	95	}
	96
	97	#ifndef HAVE_STRNLEN
	98	/*
	99	* Incredibly, libc5 doesn't appear to have strnlen. So we have to
	100	* provide our own.
	101	*/
	102	int e2fsck_strnlen(const char * s, int count)
	103	{
	104	const char *cp = s;
	105
	106	while (count-- && *cp)
	107	cp++;
	108	return cp - s;
	109	}
	110	#endif
	111
542867fb	112	#ifndef HAVE_CONIO_H
3e699064	113	static int read_a_char(void)
542867fb TT	114	{
	115	char c;
	116	int r;
	117	int fail = 0;
	118
	119	while(1) {
	120	if (e2fsck_global_ctx &&
	121	(e2fsck_global_ctx->flags & E2F_FLAG_CANCEL)) {
	122	return 3;
	123	}
	124	r = read(0, &c, 1);
	125	if (r == 1)
	126	return c;
	127	if (fail++ > 100)
	128	break;
	129	}
	130	return EOF;
	131	}
	132	#endif
	133
3839e657 TT	134	int ask_yn(const char * string, int def)
	135	{
	136	int c;
3839e657	137	const char *defstr;
53ef44c4 TT	138	const char *short_yes = _("yY");
53ef44c4 TT	139	const char *short_no = _("nN");
3839e657	140
9ecd8bec TT	141	#ifdef HAVE_TERMIOS_H
	142	struct termios termios, tmp;
	143
3839e657 TT	144	tcgetattr (0, &termios);
	145	tmp = termios;
	146	tmp.c_lflag &= ~(ICANON \| ECHO);
50e1e10f TT	147	tmp.c_cc[VMIN] = 1;
50e1e10f TT	148	tmp.c_cc[VTIME] = 0;
3839e657	149	tcsetattr (0, TCSANOW, &tmp);
9ecd8bec	150	#endif
3839e657 TT	151
3839e657 TT	152	if (def == 1)
542867fb	153	defstr = _(_("<y>"));
3839e657	154	else if (def == 0)
542867fb	155	defstr = _(_("<n>"));
3839e657	156	else
0c4a0726	157	defstr = _(" (y/n)");
3839e657 TT	158	printf("%s%s? ", string, defstr);
	159	while (1) {
	160	fflush (stdout);
e6597048	161	if ((c = read_a_char()) == EOF)
3839e657	162	break;
542867fb TT	163	if (c == 3) {
	164	#ifdef HAVE_TERMIOS_H
	165	tcsetattr (0, TCSANOW, &termios);
	166	#endif
	167	if (e2fsck_global_ctx &&
	168	e2fsck_global_ctx->flags & E2F_FLAG_SETJMP_OK) {
	169	puts("\n");
	170	longjmp(e2fsck_global_ctx->abort_loc, 1);
	171	}
	172	puts(_("cancelled!\n"));
	173	return 0;
	174	}
0c4a0726	175	if (strchr(short_yes, (char) c)) {
3839e657 TT	176	def = 1;
	177	break;
	178	}
0c4a0726	179	else if (strchr(short_no, (char) c)) {
3839e657 TT	180	def = 0;
	181	break;
	182	}
	183	else if ((c == ' ' \|\| c == '\n') && (def != -1))
	184	break;
	185	}
	186	if (def)
542867fb	187	puts(_("yes\n"));
3839e657	188	else
542867fb	189	puts (_("no\n"));
9ecd8bec	190	#ifdef HAVE_TERMIOS_H
3839e657	191	tcsetattr (0, TCSANOW, &termios);
9ecd8bec	192	#endif
3839e657 TT	193	return def;
	194	}
	195
1b6bf175	196	int ask (e2fsck_t ctx, const char * string, int def)
3839e657	197	{
1b6bf175	198	if (ctx->options & E2F_OPT_NO) {
0c4a0726	199	printf (_("%s? no\n\n"), string);
3839e657 TT	200	return 0;
3839e657 TT	201	}
1b6bf175	202	if (ctx->options & E2F_OPT_YES) {
0c4a0726	203	printf (_("%s? yes\n\n"), string);
3839e657 TT	204	return 1;
3839e657 TT	205	}
1b6bf175	206	if (ctx->options & E2F_OPT_PREEN) {
0c4a0726	207	printf ("%s? %s\n\n", string, def ? _("yes") : _("no"));
3839e657 TT	208	return def;
	209	}
	210	return ask_yn(string, def);
	211	}
	212
f8188fff	213	void e2fsck_read_bitmaps(e2fsck_t ctx)
3839e657	214	{
1b6bf175	215	ext2_filsys fs = ctx->fs;
3839e657	216	errcode_t retval;
e94bc631	217	const char *old_op;
3839e657	218
1b6bf175 TT	219	if (ctx->invalid_bitmaps) {
1b6bf175 TT	220	com_err(ctx->program_name, 0,
0c4a0726	221	_("e2fsck_read_bitmaps: illegal bitmap block(s) for %s"),
1b6bf175	222	ctx->device_name);
f8188fff	223	fatal_error(ctx, 0);
3839e657	224	}
f3db3566	225
e94bc631	226	old_op = ehandler_operation(_("reading inode and block bitmaps"));
f3db3566	227	retval = ext2fs_read_bitmaps(fs);
e94bc631	228	ehandler_operation(old_op);
f3db3566	229	if (retval) {
1b6bf175	230	com_err(ctx->program_name, retval,
0c4a0726	231	_("while retrying to read bitmaps for %s"),
1b6bf175	232	ctx->device_name);
f8188fff	233	fatal_error(ctx, 0);
3839e657 TT	234	}
	235	}
	236
f8188fff	237	void e2fsck_write_bitmaps(e2fsck_t ctx)
3839e657	238	{
1b6bf175	239	ext2_filsys fs = ctx->fs;
3839e657	240	errcode_t retval;
e94bc631	241	const char *old_op;
3839e657	242
1bb6f6c8 AD	243	old_op = ehandler_operation(_("writing block and inode bitmaps"));
	244	retval = ext2fs_write_bitmaps(fs);
	245	ehandler_operation(old_op);
	246	if (retval) {
	247	com_err(ctx->program_name, retval,
	248	_("while rewriting block and inode bitmaps for %s"),
	249	ctx->device_name);
	250	fatal_error(ctx, 0);
3839e657 TT	251	}
	252	}
	253
1b6bf175	254	void preenhalt(e2fsck_t ctx)
3839e657	255	{
1b6bf175 TT	256	ext2_filsys fs = ctx->fs;
	257
	258	if (!(ctx->options & E2F_OPT_PREEN))
3839e657	259	return;
0c4a0726 TT	260	fprintf(stderr, _("\n\n%s: UNEXPECTED INCONSISTENCY; "
0c4a0726 TT	261	"RUN fsck MANUALLY.\n\t(i.e., without -a or -p options)\n"),
1b6bf175	262	ctx->device_name);
79cc3362	263	ctx->flags \|= E2F_FLAG_EXITING;
50e1e10f TT	264	if (fs != NULL) {
	265	fs->super->s_state \|= EXT2_ERROR_FS;
	266	ext2fs_mark_super_dirty(fs);
	267	ext2fs_close(fs);
	268	}
3839e657 TT	269	exit(FSCK_UNCORRECTED);
	270	}
	271
8bf191e8	272	#ifdef RESOURCE_TRACK
6d96b00d	273	void init_resource_track(struct resource_track *track, io_channel channel)
3839e657	274	{
50e1e10f	275	#ifdef HAVE_GETRUSAGE
3839e657	276	struct rusage r;
50e1e10f	277	#endif
6d96b00d	278	io_stats io_start = 0;
efc6f628	279
3839e657 TT	280	track->brk_start = sbrk(0);
3839e657 TT	281	gettimeofday(&track->time_start, 0);
50e1e10f	282	#ifdef HAVE_GETRUSAGE
53ef44c4 TT	283	#ifdef sun
53ef44c4 TT	284	memset(&r, 0, sizeof(struct rusage));
1b6bf175	285	#endif
3839e657 TT	286	getrusage(RUSAGE_SELF, &r);
	287	track->user_start = r.ru_utime;
	288	track->system_start = r.ru_stime;
50e1e10f TT	289	#else
	290	track->user_start.tv_sec = track->user_start.tv_usec = 0;
	291	track->system_start.tv_sec = track->system_start.tv_usec = 0;
	292	#endif
6d96b00d TT	293	track->bytes_read = 0;
	294	track->bytes_written = 0;
	295	if (channel && channel->manager && channel->manager->get_stats)
	296	channel->manager->get_stats(channel, &io_start);
	297	if (io_start) {
	298	track->bytes_read = io_start->bytes_read;
	299	track->bytes_written = io_start->bytes_written;
	300	}
3839e657 TT	301	}
3839e657 TT	302
21c84b71 TT	303	#ifdef __GNUC__
	304	#define _INLINE_ __inline__
	305	#else
	306	#define _INLINE_
	307	#endif
	308
	309	static _INLINE_ float timeval_subtract(struct timeval *tv1,
	310	struct timeval *tv2)
3839e657 TT	311	{
	312	return ((tv1->tv_sec - tv2->tv_sec) +
	313	((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
	314	}
	315
9facd076 KC	316	void print_resource_track(e2fsck_t ctx, const char *desc,
9facd076 KC	317	struct resource_track *track, io_channel channel)
3839e657	318	{
50e1e10f	319	#ifdef HAVE_GETRUSAGE
3839e657	320	struct rusage r;
4a9f5936 TT	321	#endif
	322	#ifdef HAVE_MALLINFO
	323	struct mallinfo malloc_info;
50e1e10f	324	#endif
3839e657 TT	325	struct timeval time_end;
3839e657 TT	326
9facd076 KC	327	if ((desc && !(ctx->options & E2F_OPT_TIME2)) \|\|
	328	(!desc && !(ctx->options & E2F_OPT_TIME)))
	329	return;
	330
	331	e2fsck_clear_progbar(ctx);
3839e657	332	gettimeofday(&time_end, 0);
1b6bf175 TT	333
1b6bf175 TT	334	if (desc)
7fdfabd3	335	printf("%s: ", desc);
4a9f5936 TT	336
4a9f5936 TT	337	#ifdef HAVE_MALLINFO
70eabde9	338	#define kbytes(x) (((unsigned long)(x) + 1023) / 1024)
efc6f628	339
4a9f5936	340	malloc_info = mallinfo();
70eabde9	341	printf(_("Memory used: %luk/%luk (%luk/%luk), "),
80c5d7e4 TT	342	kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
80c5d7e4 TT	343	kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
4a9f5936	344	#else
70eabde9 AD	345	printf(_("Memory used: %lu, "),
	346	(unsigned long) (((char *) sbrk(0)) -
	347	((char *) track->brk_start)));
efc6f628	348	#endif
50e1e10f	349	#ifdef HAVE_GETRUSAGE
3839e657 TT	350	getrusage(RUSAGE_SELF, &r);
3839e657 TT	351
80c5d7e4	352	printf(_("time: %5.2f/%5.2f/%5.2f\n"),
3839e657 TT	353	timeval_subtract(&time_end, &track->time_start),
	354	timeval_subtract(&r.ru_utime, &track->user_start),
	355	timeval_subtract(&r.ru_stime, &track->system_start));
50e1e10f	356	#else
0c4a0726	357	printf(_("elapsed time: %6.3f\n"),
50e1e10f TT	358	timeval_subtract(&time_end, &track->time_start));
50e1e10f TT	359	#endif
6d96b00d TT	360	#define mbytes(x) (((x) + 1048575) / 1048576)
	361	if (channel && channel->manager && channel->manager->get_stats) {
	362	io_stats delta = 0;
	363	unsigned long long bytes_read = 0;
	364	unsigned long long bytes_written = 0;
	365
	366	if (desc)
	367	printf("%s: ", desc);
	368
	369	channel->manager->get_stats(channel, &delta);
	370	if (delta) {
	371	bytes_read = delta->bytes_read - track->bytes_read;
efc6f628	372	bytes_written = delta->bytes_written -
6d96b00d TT	373	track->bytes_written;
	374	}
	375	printf("I/O read: %lluMB, write: %lluMB, rate: %.2fMB/s\n",
	376	mbytes(bytes_read), mbytes(bytes_written),
	377	(double)mbytes(bytes_read + bytes_written) /
	378	timeval_subtract(&time_end, &track->time_start));
	379	}
3839e657	380	}
8bf191e8	381	#endif /* RESOURCE_TRACK */
3839e657	382
08b21301	383	void e2fsck_read_inode(e2fsck_t ctx, unsigned long ino,
f3db3566 TT	384	struct ext2_inode * inode, const char *proc)
	385	{
	386	int retval;
	387
08b21301	388	retval = ext2fs_read_inode(ctx->fs, ino, inode);
f3db3566 TT	389	if (retval) {
f3db3566 TT	390	com_err("ext2fs_read_inode", retval,
611378fe	391	_("while reading inode %lu in %s"), ino, proc);
f8188fff	392	fatal_error(ctx, 0);
f3db3566 TT	393	}
	394	}
	395
fefaef39 AD	396	void e2fsck_read_inode_full(e2fsck_t ctx, unsigned long ino,
	397	struct ext2_inode *inode, int bufsize,
	398	const char *proc)
	399	{
	400	int retval;
	401
	402	retval = ext2fs_read_inode_full(ctx->fs, ino, inode, bufsize);
	403	if (retval) {
	404	com_err("ext2fs_read_inode_full", retval,
611378fe	405	_("while reading inode %lu in %s"), ino, proc);
fefaef39 AD	406	fatal_error(ctx, 0);
	407	}
	408	}
	409
cebe48a1 TT	410	extern void e2fsck_write_inode_full(e2fsck_t ctx, unsigned long ino,
	411	struct ext2_inode * inode, int bufsize,
	412	const char *proc)
	413	{
	414	int retval;
	415
	416	retval = ext2fs_write_inode_full(ctx->fs, ino, inode, bufsize);
	417	if (retval) {
	418	com_err("ext2fs_write_inode", retval,
611378fe	419	_("while writing inode %lu in %s"), ino, proc);
cebe48a1 TT	420	fatal_error(ctx, 0);
	421	}
	422	}
	423
08b21301	424	extern void e2fsck_write_inode(e2fsck_t ctx, unsigned long ino,
f3db3566 TT	425	struct ext2_inode * inode, const char *proc)
	426	{
	427	int retval;
	428
08b21301	429	retval = ext2fs_write_inode(ctx->fs, ino, inode);
f3db3566 TT	430	if (retval) {
f3db3566 TT	431	com_err("ext2fs_write_inode", retval,
611378fe	432	_("while writing inode %lu in %s"), ino, proc);
f8188fff	433	fatal_error(ctx, 0);
f3db3566 TT	434	}
	435	}
	436
3839e657 TT	437	#ifdef MTRACE
	438	void mtrace_print(char *mesg)
	439	{
	440	FILE *malloc_get_mallstream();
	441	FILE *f = malloc_get_mallstream();
	442
	443	if (f)
	444	fprintf(f, "============= %s\n", mesg);
	445	}
	446	#endif
	447
f1a1761d TT	448	blk_t get_backup_sb(e2fsck_t ctx, ext2_filsys fs, const char *name,
f1a1761d TT	449	io_manager manager)
1b6bf175	450	{
f1a1761d TT	451	struct ext2_super_block *sb;
f1a1761d TT	452	io_channel io = NULL;
fae9bfaa	453	void *buf = NULL;
f1a1761d TT	454	int blocksize;
f1a1761d TT	455	blk_t superblock, ret_sb = 8193;
efc6f628	456
f1a1761d TT	457	if (fs && fs->super) {
	458	ret_sb = (fs->super->s_blocks_per_group +
	459	fs->super->s_first_data_block);
	460	if (ctx) {
	461	ctx->superblock = ret_sb;
	462	ctx->blocksize = fs->blocksize;
	463	}
	464	return ret_sb;
	465	}
efc6f628	466
f1a1761d TT	467	if (ctx) {
	468	if (ctx->blocksize) {
	469	ret_sb = ctx->blocksize * 8;
	470	if (ctx->blocksize == 1024)
	471	ret_sb++;
	472	ctx->superblock = ret_sb;
	473	return ret_sb;
	474	}
	475	ctx->superblock = ret_sb;
	476	ctx->blocksize = 1024;
	477	}
	478
	479	if (!name \|\| !manager)
	480	goto cleanup;
	481
	482	if (manager->open(name, 0, &io) != 0)
	483	goto cleanup;
	484
	485	if (ext2fs_get_mem(SUPERBLOCK_SIZE, &buf))
	486	goto cleanup;
	487	sb = (struct ext2_super_block *) buf;
	488
932a489c AD	489	for (blocksize = EXT2_MIN_BLOCK_SIZE;
932a489c AD	490	blocksize <= EXT2_MAX_BLOCK_SIZE ; blocksize *= 2) {
f1a1761d TT	491	superblock = blocksize*8;
	492	if (blocksize == 1024)
	493	superblock++;
	494	io_channel_set_blksize(io, blocksize);
	495	if (io_channel_read_blk(io, superblock,
	496	-SUPERBLOCK_SIZE, buf))
	497	continue;
2eae0930	498	#ifdef WORDS_BIGENDIAN
f1a1761d TT	499	if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
	500	ext2fs_swap_super(sb);
	501	#endif
e7b5d3c0 DD	502	if ((sb->s_magic == EXT2_SUPER_MAGIC) &&
e7b5d3c0 DD	503	(EXT2_BLOCK_SIZE(sb) == blocksize)) {
557ddb2f TT	504	ret_sb = superblock;
	505	if (ctx) {
	506	ctx->superblock = superblock;
	507	ctx->blocksize = blocksize;
	508	}
f1a1761d TT	509	break;
	510	}
	511	}
	512
	513	cleanup:
	514	if (io)
	515	io_channel_close(io);
	516	if (buf)
	517	ext2fs_free_mem(&buf);
	518	return (ret_sb);
1b6bf175	519	}
3839e657	520
6fdc7a32 TT	521	/*
	522	* Given a mode, return the ext2 file type
	523	*/
	524	int ext2_file_type(unsigned int mode)
	525	{
	526	if (LINUX_S_ISREG(mode))
	527	return EXT2_FT_REG_FILE;
	528
	529	if (LINUX_S_ISDIR(mode))
	530	return EXT2_FT_DIR;
efc6f628	531
6fdc7a32 TT	532	if (LINUX_S_ISCHR(mode))
6fdc7a32 TT	533	return EXT2_FT_CHRDEV;
efc6f628	534
6fdc7a32 TT	535	if (LINUX_S_ISBLK(mode))
6fdc7a32 TT	536	return EXT2_FT_BLKDEV;
efc6f628	537
6fdc7a32 TT	538	if (LINUX_S_ISLNK(mode))
	539	return EXT2_FT_SYMLINK;
	540
	541	if (LINUX_S_ISFIFO(mode))
	542	return EXT2_FT_FIFO;
efc6f628	543
6fdc7a32 TT	544	if (LINUX_S_ISSOCK(mode))
6fdc7a32 TT	545	return EXT2_FT_SOCK;
efc6f628	546
6fdc7a32 TT	547	return 0;
6fdc7a32 TT	548	}
49a7360b JS	549
	550	#define STRIDE_LENGTH 8
	551	/*
	552	* Helper function which zeros out _num_ blocks starting at _blk_. In
	553	* case of an error, the details of the error is returned via _ret_blk_
	554	* and _ret_count_ if they are non-NULL pointers. Returns 0 on
	555	* success, and an error code on an error.
	556	*
	557	* As a special case, if the first argument is NULL, then it will
	558	* attempt to free the static zeroizing buffer. (This is to keep
	559	* programs that check for memory leaks happy.)
	560	*/
	561	errcode_t e2fsck_zero_blocks(ext2_filsys fs, blk_t blk, int num,
	562	blk_t ret_blk, int ret_count)
	563	{
	564	int j, count, next_update, next_update_incr;
	565	static char *buf;
	566	errcode_t retval;
	567
	568	/* If fs is null, clean up the static buffer and return */
	569	if (!fs) {
	570	if (buf) {
	571	free(buf);
	572	buf = 0;
	573	}
	574	return 0;
	575	}
	576	/* Allocate the zeroizing buffer if necessary */
	577	if (!buf) {
	578	buf = malloc(fs->blocksize * STRIDE_LENGTH);
	579	if (!buf) {
	580	com_err("malloc", ENOMEM,
	581	_("while allocating zeroizing buffer"));
	582	exit(1);
	583	}
	584	memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
	585	}
	586	/* OK, do the write loop */
	587	next_update = 0;
	588	next_update_incr = num / 100;
	589	if (next_update_incr < 1)
	590	next_update_incr = 1;
	591	for (j = 0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
	592	count = num - j;
	593	if (count > STRIDE_LENGTH)
	594	count = STRIDE_LENGTH;
	595	retval = io_channel_write_blk(fs->io, blk, count, buf);
	596	if (retval) {
	597	if (ret_count)
	598	*ret_count = count;
	599	if (ret_blk)
	600	*ret_blk = blk;
	601	return retval;
	602	}
	603	}
	604	return 0;
	605	}
80875db5 TT	606
	607	/*
	608	* Check to see if a filesystem is in /proc/filesystems.
	609	* Returns 1 if found, 0 if not
	610	*/
	611	int fs_proc_check(const char *fs_name)
	612	{
	613	FILE *f;
	614	char buf[80], cp, t;
	615
	616	f = fopen("/proc/filesystems", "r");
	617	if (!f)
	618	return (0);
	619	while (!feof(f)) {
	620	if (!fgets(buf, sizeof(buf), f))
	621	break;
	622	cp = buf;
	623	if (!isspace(*cp)) {
	624	while (cp && !isspace(cp))
	625	cp++;
	626	}
	627	while (cp && isspace(cp))
	628	cp++;
	629	if ((t = strchr(cp, '\n')) != NULL)
	630	*t = 0;
	631	if ((t = strchr(cp, '\t')) != NULL)
	632	*t = 0;
	633	if ((t = strchr(cp, ' ')) != NULL)
	634	*t = 0;
	635	if (!strcmp(fs_name, cp)) {
	636	fclose(f);
	637	return (1);
	638	}
	639	}
	640	fclose(f);
	641	return (0);
	642	}
	643
	644	/*
	645	* Check to see if a filesystem is available as a module
	646	* Returns 1 if found, 0 if not
	647	*/
	648	int check_for_modules(const char *fs_name)
	649	{
	650	#ifdef __linux__
	651	struct utsname uts;
	652	FILE *f;
	653	char buf[1024], cp, t;
	654	int i;
	655
	656	if (uname(&uts))
	657	return (0);
	658	snprintf(buf, sizeof(buf), "/lib/modules/%s/modules.dep", uts.release);
	659
	660	f = fopen(buf, "r");
	661	if (!f)
	662	return (0);
	663	while (!feof(f)) {
	664	if (!fgets(buf, sizeof(buf), f))
	665	break;
	666	if ((cp = strchr(buf, ':')) != NULL)
	667	*cp = 0;
	668	else
	669	continue;
670	if ((cp = strrchr(buf, '/')) != NULL)
671	cp++;
f2fe5da3 ES	672	else
f2fe5da3 ES	673	cp = buf;
80875db5 TT	674	i = strlen(cp);
	675	if (i > 3) {
	676	t = cp + i - 3;
	677	if (!strcmp(t, ".ko"))
	678	*t = 0;
	679	}
	680	if (!strcmp(cp, fs_name)) {
	681	fclose(f);
	682	return (1);
	683	}
	684	}
	685	fclose(f);
	686	#endif /* __linux__ */
	687	return (0);
	688	}
b0258cbc TT	689
	690	/*
	691	* Helper function that does the right thing if write returns a
	692	* partial write, or an EGAIN/EINTR error.
	693	*/
	694	int write_all(int fd, char *buf, size_t count)
	695	{
	696	ssize_t ret;
	697	int c = 0;
	698
	699	while (count > 0) {
	700	ret = write(fd, buf, count);
	701	if (ret < 0) {
	702	if ((errno == EAGAIN) \|\| (errno == EINTR))
	703	continue;
	704	return -1;
	705	}
	706	count -= ret;
	707	buf += ret;
	708	c += ret;
	709	}
	710	return c;
	711	}