mirror of https://github.com/vitalif/e2fsprogs
760 lines
16 KiB
C
760 lines
16 KiB
C
/*
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* util.c --- miscellaneous utilities
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*
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* Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef __linux__
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#include <sys/utsname.h>
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#endif
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#ifdef HAVE_CONIO_H
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#undef HAVE_TERMIOS_H
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#include <conio.h>
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#define read_a_char() getch()
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#else
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#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#endif
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include "e2fsck.h"
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extern e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */
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#include <time.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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void fatal_error(e2fsck_t ctx, const char *msg)
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{
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ext2_filsys fs = ctx->fs;
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int exit_value = FSCK_ERROR;
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if (msg)
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fprintf (stderr, "e2fsck: %s\n", msg);
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if (!fs)
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goto out;
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if (fs->io) {
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ext2fs_mmp_stop(ctx->fs);
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if (ctx->fs->io->magic == EXT2_ET_MAGIC_IO_CHANNEL)
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io_channel_flush(ctx->fs->io);
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else
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fprintf(stderr, "e2fsck: io manager magic bad!\n");
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}
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if (ext2fs_test_changed(fs)) {
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exit_value |= FSCK_NONDESTRUCT;
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printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
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ctx->device_name);
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if (ctx->mount_flags & EXT2_MF_ISROOT)
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exit_value |= FSCK_REBOOT;
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}
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if (!ext2fs_test_valid(fs)) {
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printf(_("\n%s: ********** WARNING: Filesystem still has "
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"errors **********\n\n"), ctx->device_name);
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exit_value |= FSCK_UNCORRECTED;
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exit_value &= ~FSCK_NONDESTRUCT;
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}
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out:
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ctx->flags |= E2F_FLAG_ABORT;
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if (ctx->flags & E2F_FLAG_SETJMP_OK)
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longjmp(ctx->abort_loc, 1);
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exit(exit_value);
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}
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void *e2fsck_allocate_memory(e2fsck_t ctx, unsigned int size,
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const char *description)
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{
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void *ret;
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char buf[256];
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#ifdef DEBUG_ALLOCATE_MEMORY
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printf("Allocating %u bytes for %s...\n", size, description);
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#endif
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ret = malloc(size);
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if (!ret) {
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sprintf(buf, "Can't allocate %s\n", description);
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fatal_error(ctx, buf);
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}
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memset(ret, 0, size);
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return ret;
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}
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char *string_copy(e2fsck_t ctx EXT2FS_ATTR((unused)),
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const char *str, int len)
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{
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char *ret;
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if (!str)
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return NULL;
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if (!len)
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len = strlen(str);
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ret = malloc(len+1);
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if (ret) {
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strncpy(ret, str, len);
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ret[len] = 0;
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}
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return ret;
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}
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#ifndef HAVE_STRNLEN
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/*
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* Incredibly, libc5 doesn't appear to have strnlen. So we have to
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* provide our own.
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*/
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int e2fsck_strnlen(const char * s, int count)
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{
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const char *cp = s;
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while (count-- && *cp)
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cp++;
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return cp - s;
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}
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#endif
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#ifndef HAVE_CONIO_H
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static int read_a_char(void)
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{
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char c;
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int r;
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int fail = 0;
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while(1) {
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if (e2fsck_global_ctx &&
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(e2fsck_global_ctx->flags & E2F_FLAG_CANCEL)) {
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return 3;
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}
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r = read(0, &c, 1);
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if (r == 1)
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return c;
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if (fail++ > 100)
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break;
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}
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return EOF;
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}
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#endif
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int ask_yn(const char * string, int def)
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{
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int c;
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const char *defstr;
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const char *short_yes = _("yY");
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const char *short_no = _("nN");
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#ifdef HAVE_TERMIOS_H
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struct termios termios, tmp;
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tcgetattr (0, &termios);
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tmp = termios;
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tmp.c_lflag &= ~(ICANON | ECHO);
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tmp.c_cc[VMIN] = 1;
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tmp.c_cc[VTIME] = 0;
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tcsetattr (0, TCSANOW, &tmp);
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#endif
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if (def == 1)
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defstr = _(_("<y>"));
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else if (def == 0)
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defstr = _(_("<n>"));
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else
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defstr = _(" (y/n)");
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printf("%s%s? ", string, defstr);
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while (1) {
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fflush (stdout);
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if ((c = read_a_char()) == EOF)
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break;
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if (c == 3) {
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#ifdef HAVE_TERMIOS_H
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tcsetattr (0, TCSANOW, &termios);
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#endif
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if (e2fsck_global_ctx &&
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e2fsck_global_ctx->flags & E2F_FLAG_SETJMP_OK) {
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puts("\n");
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longjmp(e2fsck_global_ctx->abort_loc, 1);
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}
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puts(_("cancelled!\n"));
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return 0;
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}
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if (strchr(short_yes, (char) c)) {
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def = 1;
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break;
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}
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else if (strchr(short_no, (char) c)) {
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def = 0;
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break;
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}
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else if ((c == 27 || c == ' ' || c == '\n') && (def != -1))
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break;
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}
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if (def)
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puts(_("yes\n"));
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else
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puts (_("no\n"));
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#ifdef HAVE_TERMIOS_H
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tcsetattr (0, TCSANOW, &termios);
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#endif
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return def;
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}
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int ask (e2fsck_t ctx, const char * string, int def)
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{
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if (ctx->options & E2F_OPT_NO) {
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printf (_("%s? no\n\n"), string);
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return 0;
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}
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if (ctx->options & E2F_OPT_YES) {
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printf (_("%s? yes\n\n"), string);
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return 1;
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}
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if (ctx->options & E2F_OPT_PREEN) {
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printf ("%s? %s\n\n", string, def ? _("yes") : _("no"));
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return def;
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}
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return ask_yn(string, def);
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}
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void e2fsck_read_bitmaps(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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errcode_t retval;
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const char *old_op;
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if (ctx->invalid_bitmaps) {
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com_err(ctx->program_name, 0,
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_("e2fsck_read_bitmaps: illegal bitmap block(s) for %s"),
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ctx->device_name);
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fatal_error(ctx, 0);
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}
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old_op = ehandler_operation(_("reading inode and block bitmaps"));
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retval = ext2fs_read_bitmaps(fs);
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ehandler_operation(old_op);
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if (retval) {
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com_err(ctx->program_name, retval,
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_("while retrying to read bitmaps for %s"),
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ctx->device_name);
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fatal_error(ctx, 0);
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}
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}
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void e2fsck_write_bitmaps(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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errcode_t retval;
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const char *old_op;
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old_op = ehandler_operation(_("writing block and inode bitmaps"));
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retval = ext2fs_write_bitmaps(fs);
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ehandler_operation(old_op);
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if (retval) {
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com_err(ctx->program_name, retval,
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_("while rewriting block and inode bitmaps for %s"),
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ctx->device_name);
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fatal_error(ctx, 0);
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}
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}
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void preenhalt(e2fsck_t ctx)
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{
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ext2_filsys fs = ctx->fs;
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if (!(ctx->options & E2F_OPT_PREEN))
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return;
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fprintf(stderr, _("\n\n%s: UNEXPECTED INCONSISTENCY; "
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"RUN fsck MANUALLY.\n\t(i.e., without -a or -p options)\n"),
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ctx->device_name);
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ctx->flags |= E2F_FLAG_EXITING;
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if (fs != NULL) {
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fs->super->s_state |= EXT2_ERROR_FS;
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ext2fs_mark_super_dirty(fs);
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ext2fs_close(fs);
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}
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exit(FSCK_UNCORRECTED);
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}
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#ifdef RESOURCE_TRACK
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void init_resource_track(struct resource_track *track, io_channel channel)
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{
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#ifdef HAVE_GETRUSAGE
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struct rusage r;
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#endif
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io_stats io_start = 0;
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track->brk_start = sbrk(0);
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gettimeofday(&track->time_start, 0);
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#ifdef HAVE_GETRUSAGE
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#ifdef sun
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memset(&r, 0, sizeof(struct rusage));
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#endif
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getrusage(RUSAGE_SELF, &r);
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track->user_start = r.ru_utime;
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track->system_start = r.ru_stime;
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#else
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track->user_start.tv_sec = track->user_start.tv_usec = 0;
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track->system_start.tv_sec = track->system_start.tv_usec = 0;
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#endif
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track->bytes_read = 0;
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track->bytes_written = 0;
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if (channel && channel->manager && channel->manager->get_stats)
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channel->manager->get_stats(channel, &io_start);
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if (io_start) {
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track->bytes_read = io_start->bytes_read;
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track->bytes_written = io_start->bytes_written;
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}
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}
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#ifdef __GNUC__
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#define _INLINE_ __inline__
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#else
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#define _INLINE_
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#endif
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static _INLINE_ float timeval_subtract(struct timeval *tv1,
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struct timeval *tv2)
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{
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return ((tv1->tv_sec - tv2->tv_sec) +
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((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
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}
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void print_resource_track(e2fsck_t ctx, const char *desc,
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struct resource_track *track, io_channel channel)
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{
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#ifdef HAVE_GETRUSAGE
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struct rusage r;
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#endif
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#ifdef HAVE_MALLINFO
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struct mallinfo malloc_info;
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#endif
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struct timeval time_end;
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if ((desc && !(ctx->options & E2F_OPT_TIME2)) ||
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(!desc && !(ctx->options & E2F_OPT_TIME)))
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return;
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e2fsck_clear_progbar(ctx);
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gettimeofday(&time_end, 0);
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if (desc)
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printf("%s: ", desc);
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#ifdef HAVE_MALLINFO
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#define kbytes(x) (((unsigned long)(x) + 1023) / 1024)
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malloc_info = mallinfo();
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printf(_("Memory used: %luk/%luk (%luk/%luk), "),
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kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
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kbytes(malloc_info.uordblks), kbytes(malloc_info.fordblks));
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#else
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printf(_("Memory used: %lu, "),
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(unsigned long) (((char *) sbrk(0)) -
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((char *) track->brk_start)));
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#endif
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#ifdef HAVE_GETRUSAGE
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getrusage(RUSAGE_SELF, &r);
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printf(_("time: %5.2f/%5.2f/%5.2f\n"),
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timeval_subtract(&time_end, &track->time_start),
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timeval_subtract(&r.ru_utime, &track->user_start),
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timeval_subtract(&r.ru_stime, &track->system_start));
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#else
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printf(_("elapsed time: %6.3f\n"),
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timeval_subtract(&time_end, &track->time_start));
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#endif
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#define mbytes(x) (((x) + 1048575) / 1048576)
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if (channel && channel->manager && channel->manager->get_stats) {
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io_stats delta = 0;
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unsigned long long bytes_read = 0;
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unsigned long long bytes_written = 0;
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if (desc)
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printf("%s: ", desc);
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channel->manager->get_stats(channel, &delta);
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if (delta) {
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bytes_read = delta->bytes_read - track->bytes_read;
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bytes_written = delta->bytes_written -
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track->bytes_written;
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}
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printf("I/O read: %lluMB, write: %lluMB, rate: %.2fMB/s\n",
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mbytes(bytes_read), mbytes(bytes_written),
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(double)mbytes(bytes_read + bytes_written) /
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timeval_subtract(&time_end, &track->time_start));
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}
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}
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#endif /* RESOURCE_TRACK */
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void e2fsck_read_inode(e2fsck_t ctx, unsigned long ino,
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struct ext2_inode * inode, const char *proc)
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{
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int retval;
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retval = ext2fs_read_inode(ctx->fs, ino, inode);
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if (retval) {
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com_err("ext2fs_read_inode", retval,
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_("while reading inode %lu in %s"), ino, proc);
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fatal_error(ctx, 0);
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}
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}
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void e2fsck_read_inode_full(e2fsck_t ctx, unsigned long ino,
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struct ext2_inode *inode, int bufsize,
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const char *proc)
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{
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int retval;
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retval = ext2fs_read_inode_full(ctx->fs, ino, inode, bufsize);
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if (retval) {
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com_err("ext2fs_read_inode_full", retval,
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_("while reading inode %lu in %s"), ino, proc);
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fatal_error(ctx, 0);
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}
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}
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extern void e2fsck_write_inode_full(e2fsck_t ctx, unsigned long ino,
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struct ext2_inode * inode, int bufsize,
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const char *proc)
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{
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int retval;
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retval = ext2fs_write_inode_full(ctx->fs, ino, inode, bufsize);
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if (retval) {
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com_err("ext2fs_write_inode", retval,
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_("while writing inode %lu in %s"), ino, proc);
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fatal_error(ctx, 0);
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}
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}
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extern void e2fsck_write_inode(e2fsck_t ctx, unsigned long ino,
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struct ext2_inode * inode, const char *proc)
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{
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int retval;
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retval = ext2fs_write_inode(ctx->fs, ino, inode);
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if (retval) {
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com_err("ext2fs_write_inode", retval,
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_("while writing inode %lu in %s"), ino, proc);
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fatal_error(ctx, 0);
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}
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}
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#ifdef MTRACE
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void mtrace_print(char *mesg)
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{
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FILE *malloc_get_mallstream();
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FILE *f = malloc_get_mallstream();
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if (f)
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fprintf(f, "============= %s\n", mesg);
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}
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#endif
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blk_t get_backup_sb(e2fsck_t ctx, ext2_filsys fs, const char *name,
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io_manager manager)
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{
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struct ext2_super_block *sb;
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io_channel io = NULL;
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void *buf = NULL;
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int blocksize;
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blk_t superblock, ret_sb = 8193;
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if (fs && fs->super) {
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ret_sb = (fs->super->s_blocks_per_group +
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fs->super->s_first_data_block);
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if (ctx) {
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ctx->superblock = ret_sb;
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ctx->blocksize = fs->blocksize;
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}
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return ret_sb;
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}
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if (ctx) {
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if (ctx->blocksize) {
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ret_sb = ctx->blocksize * 8;
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if (ctx->blocksize == 1024)
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ret_sb++;
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ctx->superblock = ret_sb;
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return ret_sb;
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}
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ctx->superblock = ret_sb;
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ctx->blocksize = 1024;
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}
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if (!name || !manager)
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goto cleanup;
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if (manager->open(name, 0, &io) != 0)
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goto cleanup;
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if (ext2fs_get_mem(SUPERBLOCK_SIZE, &buf))
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goto cleanup;
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sb = (struct ext2_super_block *) buf;
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for (blocksize = EXT2_MIN_BLOCK_SIZE;
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blocksize <= EXT2_MAX_BLOCK_SIZE ; blocksize *= 2) {
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superblock = blocksize*8;
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if (blocksize == 1024)
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superblock++;
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io_channel_set_blksize(io, blocksize);
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if (io_channel_read_blk64(io, superblock,
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-SUPERBLOCK_SIZE, buf))
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continue;
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#ifdef WORDS_BIGENDIAN
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if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
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ext2fs_swap_super(sb);
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#endif
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if ((sb->s_magic == EXT2_SUPER_MAGIC) &&
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(EXT2_BLOCK_SIZE(sb) == blocksize)) {
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|
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_blk64(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;
|
|
}
|
|
|
|
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: last update: %s node: %s device: %s\n",
|
|
ctime(&t), mmp->mmp_nodename, mmp->mmp_bdevname);
|
|
}
|
|
}
|
|
|
|
errcode_t e2fsck_mmp_update(ext2_filsys fs)
|
|
{
|
|
errcode_t retval;
|
|
|
|
retval = ext2fs_mmp_update(fs);
|
|
if (retval == EXT2_ET_MMP_CHANGE_ABORT)
|
|
dump_mmp_msg(fs->mmp_cmp,
|
|
_("UNEXPECTED INCONSISTENCY: the filesystem is "
|
|
"being modified while fsck is running.\n"));
|
|
|
|
return retval;
|
|
}
|