[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/util-linux/fsck_minix.c b/ap/app/busybox/src/util-linux/fsck_minix.c
new file mode 100644
index 0000000..c1d1b2c
--- /dev/null
+++ b/ap/app/busybox/src/util-linux/fsck_minix.c
@@ -0,0 +1,1315 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * fsck.c - a file system consistency checker for Linux.
+ *
+ * (C) 1991, 1992 Linus Torvalds.
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+/*
+ * 09.11.91 - made the first rudimentary functions
+ *
+ * 10.11.91 - updated, does checking, no repairs yet.
+ * Sent out to the mailing-list for testing.
+ *
+ * 14.11.91 - Testing seems to have gone well. Added some
+ * correction-code, and changed some functions.
+ *
+ * 15.11.91 - More correction code. Hopefully it notices most
+ * cases now, and tries to do something about them.
+ *
+ * 16.11.91 - More corrections (thanks to Mika Jalava). Most
+ * things seem to work now. Yeah, sure.
+ *
+ * 19.04.92 - Had to start over again from this old version, as a
+ * kernel bug ate my enhanced fsck in february.
+ *
+ * 28.02.93 - added support for different directory entry sizes..
+ *
+ * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
+ * superblock information
+ *
+ * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
+ * to that required by fsutil
+ *
+ * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
+ * Added support for file system valid flag. Also
+ * added program_version variable and output of
+ * program name and version number when program
+ * is executed.
+ *
+ * 30.10.94 - added support for v2 filesystem
+ * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
+ *
+ * 10.12.94 - added test to prevent checking of mounted fs adapted
+ * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
+ * program. (Daniel Quinlan, quinlan@yggdrasil.com)
+ *
+ * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
+ * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
+ *
+ * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
+ * (Russell King). He made them for ARM. It would seem
+ * that the ARM is powerful enough to do this in C whereas
+ * i386 and m64k must use assembly to get it fast >:-)
+ * This should make minix fsck system-independent.
+ * (janl@math.uio.no, Nicolai Langfeldt)
+ *
+ * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
+ * warnings. Added mc68k bitops from
+ * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
+ *
+ * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
+ * Andreas Schwab.
+ *
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
+ * - added Native Language Support
+ *
+ *
+ * I've had no time to add comments - hopefully the function names
+ * are comments enough. As with all file system checkers, this assumes
+ * the file system is quiescent - don't use it on a mounted device
+ * unless you can be sure nobody is writing to it (and remember that the
+ * kernel can write to it when it searches for files).
+ *
+ * Usage: fsck [-larvsm] device
+ * -l for a listing of all the filenames
+ * -a for automatic repairs (not implemented)
+ * -r for repairs (interactive) (not implemented)
+ * -v for verbose (tells how many files)
+ * -s for superblock info
+ * -m for minix-like "mode not cleared" warnings
+ * -f force filesystem check even if filesystem marked as valid
+ *
+ * The device may be a block device or a image of one, but this isn't
+ * enforced (but it's not much fun on a character device :-).
+ */
+
+//usage:#define fsck_minix_trivial_usage
+//usage: "[-larvsmf] BLOCKDEV"
+//usage:#define fsck_minix_full_usage "\n\n"
+//usage: "Check MINIX filesystem\n"
+//usage: "\n -l List all filenames"
+//usage: "\n -r Perform interactive repairs"
+//usage: "\n -a Perform automatic repairs"
+//usage: "\n -v Verbose"
+//usage: "\n -s Output superblock information"
+//usage: "\n -m Show \"mode not cleared\" warnings"
+//usage: "\n -f Force file system check"
+
+#include <mntent.h>
+#include "libbb.h"
+#include "minix.h"
+
+#ifndef BLKGETSIZE
+#define BLKGETSIZE _IO(0x12,96) /* return device size */
+#endif
+
+struct BUG_bad_inode_size {
+ char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
+#if ENABLE_FEATURE_MINIX2
+ char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
+#endif
+};
+
+enum {
+#ifdef UNUSED
+ MINIX1_LINK_MAX = 250,
+ MINIX2_LINK_MAX = 65530,
+ MINIX_I_MAP_SLOTS = 8,
+ MINIX_Z_MAP_SLOTS = 64,
+ MINIX_V1 = 0x0001, /* original minix fs */
+ MINIX_V2 = 0x0002, /* minix V2 fs */
+#endif
+ MINIX_NAME_MAX = 255, /* # chars in a file name */
+};
+
+
+#if !ENABLE_FEATURE_MINIX2
+enum { version2 = 0 };
+#endif
+
+enum { MAX_DEPTH = 32 };
+
+enum { dev_fd = 3 };
+
+struct globals {
+#if ENABLE_FEATURE_MINIX2
+ smallint version2;
+#endif
+ smallint changed; /* is filesystem modified? */
+ smallint errors_uncorrected; /* flag if some error was not corrected */
+ smallint termios_set;
+ smallint dirsize;
+ smallint namelen;
+ const char *device_name;
+ int directory, regular, blockdev, chardev, links, symlinks, total;
+ char *inode_buffer;
+
+ char *inode_map;
+ char *zone_map;
+
+ unsigned char *inode_count;
+ unsigned char *zone_count;
+
+ /* File-name data */
+ int name_depth;
+ char *name_component[MAX_DEPTH+1];
+
+ /* Bigger stuff */
+ struct termios sv_termios;
+ char superblock_buffer[BLOCK_SIZE];
+ char add_zone_ind_blk[BLOCK_SIZE];
+ char add_zone_dind_blk[BLOCK_SIZE];
+ IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
+ char check_file_blk[BLOCK_SIZE];
+
+ /* File-name data */
+ char current_name[MAX_DEPTH * MINIX_NAME_MAX];
+};
+#define G (*ptr_to_globals)
+#if ENABLE_FEATURE_MINIX2
+#define version2 (G.version2 )
+#endif
+#define changed (G.changed )
+#define errors_uncorrected (G.errors_uncorrected )
+#define termios_set (G.termios_set )
+#define dirsize (G.dirsize )
+#define namelen (G.namelen )
+#define device_name (G.device_name )
+#define directory (G.directory )
+#define regular (G.regular )
+#define blockdev (G.blockdev )
+#define chardev (G.chardev )
+#define links (G.links )
+#define symlinks (G.symlinks )
+#define total (G.total )
+#define inode_buffer (G.inode_buffer )
+#define inode_map (G.inode_map )
+#define zone_map (G.zone_map )
+#define inode_count (G.inode_count )
+#define zone_count (G.zone_count )
+#define name_depth (G.name_depth )
+#define name_component (G.name_component )
+#define sv_termios (G.sv_termios )
+#define superblock_buffer (G.superblock_buffer )
+#define add_zone_ind_blk (G.add_zone_ind_blk )
+#define add_zone_dind_blk (G.add_zone_dind_blk )
+#define add_zone_tind_blk (G.add_zone_tind_blk )
+#define check_file_blk (G.check_file_blk )
+#define current_name (G.current_name )
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ dirsize = 16; \
+ namelen = 14; \
+ current_name[0] = '/'; \
+ /*current_name[1] = '\0';*/ \
+ name_component[0] = ¤t_name[0]; \
+} while (0)
+
+
+#define OPTION_STR "larvsmf"
+enum {
+ OPT_l = (1 << 0),
+ OPT_a = (1 << 1),
+ OPT_r = (1 << 2),
+ OPT_v = (1 << 3),
+ OPT_s = (1 << 4),
+ OPT_w = (1 << 5),
+ OPT_f = (1 << 6),
+};
+#define OPT_list (option_mask32 & OPT_l)
+#define OPT_automatic (option_mask32 & OPT_a)
+#define OPT_repair (option_mask32 & OPT_r)
+#define OPT_verbose (option_mask32 & OPT_v)
+#define OPT_show (option_mask32 & OPT_s)
+#define OPT_warn_mode (option_mask32 & OPT_w)
+#define OPT_force (option_mask32 & OPT_f)
+/* non-automatic repairs requested? */
+#define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
+
+
+#define Inode1 (((struct minix1_inode *) inode_buffer)-1)
+#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
+
+#define Super (*(struct minix_superblock *)(superblock_buffer))
+
+#if ENABLE_FEATURE_MINIX2
+# define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
+#else
+# define ZONES ((unsigned)(Super.s_nzones))
+#endif
+#define INODES ((unsigned)Super.s_ninodes)
+#define IMAPS ((unsigned)Super.s_imap_blocks)
+#define ZMAPS ((unsigned)Super.s_zmap_blocks)
+#define FIRSTZONE ((unsigned)Super.s_firstdatazone)
+#define ZONESIZE ((unsigned)Super.s_log_zone_size)
+#define MAXSIZE ((unsigned)Super.s_max_size)
+#define MAGIC (Super.s_magic)
+
+/* gcc likes this more (code is smaller) than macro variant */
+static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
+{
+ return (size + n-1) / n;
+}
+
+#if !ENABLE_FEATURE_MINIX2
+#define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
+#else
+#define INODE_BLOCKS div_roundup(INODES, \
+ (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
+#endif
+
+#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
+#define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
+
+/* Before you ask "where they come from?": */
+/* setbit/clrbit are supplied by sys/param.h */
+
+static int minix_bit(const char *a, unsigned i)
+{
+ return (a[i >> 3] & (1<<(i & 7)));
+}
+
+static void minix_setbit(char *a, unsigned i)
+{
+ setbit(a, i);
+ changed = 1;
+}
+static void minix_clrbit(char *a, unsigned i)
+{
+ clrbit(a, i);
+ changed = 1;
+}
+
+/* Note: do not assume 0/1, it is 0/nonzero */
+#define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
+#define inode_in_use(x) (minix_bit(inode_map,(x)))
+
+#define mark_inode(x) (minix_setbit(inode_map,(x)))
+#define unmark_inode(x) (minix_clrbit(inode_map,(x)))
+
+#define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
+#define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
+
+
+static void recursive_check(unsigned ino);
+#if ENABLE_FEATURE_MINIX2
+static void recursive_check2(unsigned ino);
+#endif
+
+static void die(const char *str) NORETURN;
+static void die(const char *str)
+{
+ if (termios_set)
+ tcsetattr_stdin_TCSANOW(&sv_termios);
+ bb_error_msg_and_die("%s", str);
+}
+
+static void push_filename(const char *name)
+{
+ // /dir/dir/dir/file
+ // ^ ^ ^
+ // [0] [1] [2] <-name_component[i]
+ if (name_depth < MAX_DEPTH) {
+ int len;
+ char *p = name_component[name_depth];
+ *p++ = '/';
+ len = sprintf(p, "%.*s", namelen, name);
+ name_component[name_depth + 1] = p + len;
+ }
+ name_depth++;
+}
+
+static void pop_filename(void)
+{
+ name_depth--;
+ if (name_depth < MAX_DEPTH) {
+ *name_component[name_depth] = '\0';
+ if (!name_depth) {
+ current_name[0] = '/';
+ current_name[1] = '\0';
+ }
+ }
+}
+
+static int ask(const char *string, int def)
+{
+ int c;
+
+ if (!OPT_repair) {
+ bb_putchar('\n');
+ errors_uncorrected = 1;
+ return 0;
+ }
+ if (OPT_automatic) {
+ bb_putchar('\n');
+ if (!def)
+ errors_uncorrected = 1;
+ return def;
+ }
+ printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
+ for (;;) {
+ fflush_all();
+ c = getchar();
+ if (c == EOF) {
+ if (!def)
+ errors_uncorrected = 1;
+ return def;
+ }
+ if (c == '\n')
+ break;
+ c |= 0x20; /* tolower */
+ if (c == 'y') {
+ def = 1;
+ break;
+ }
+ if (c == 'n') {
+ def = 0;
+ break;
+ }
+ }
+ if (def)
+ printf("y\n");
+ else {
+ printf("n\n");
+ errors_uncorrected = 1;
+ }
+ return def;
+}
+
+/*
+ * Make certain that we aren't checking a filesystem that is on a
+ * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
+ * 1994 Theodore Ts'o. Also licensed under GPL.
+ */
+static void check_mount(void)
+{
+ if (find_mount_point(device_name, 0)) {
+ int cont;
+#if ENABLE_FEATURE_MTAB_SUPPORT
+ /*
+ * If the root is mounted read-only, then /etc/mtab is
+ * probably not correct; so we won't issue a warning based on
+ * it.
+ */
+ int fd = open(bb_path_mtab_file, O_RDWR);
+
+ if (fd < 0 && errno == EROFS)
+ return;
+ close(fd);
+#endif
+ printf("%s is mounted. ", device_name);
+ cont = 0;
+ if (isatty(0) && isatty(1))
+ cont = ask("Do you really want to continue", 0);
+ if (!cont) {
+ printf("Check aborted\n");
+ exit(EXIT_SUCCESS);
+ }
+ }
+}
+
+/*
+ * check_zone_nr checks to see that *nr is a valid zone nr. If it
+ * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
+ * if an error was corrected, and returns the zone (0 for no zone
+ * or a bad zone-number).
+ */
+static int check_zone_nr2(uint32_t *nr, smallint *corrected)
+{
+ const char *msg;
+ if (!*nr)
+ return 0;
+ if (*nr < FIRSTZONE)
+ msg = "< FIRSTZONE";
+ else if (*nr >= ZONES)
+ msg = ">= ZONES";
+ else
+ return *nr;
+ printf("Zone nr %s in file '%s'. ", msg, current_name);
+ if (ask("Remove block", 1)) {
+ *nr = 0;
+ *corrected = 1;
+ }
+ return 0;
+}
+
+static int check_zone_nr(uint16_t *nr, smallint *corrected)
+{
+ uint32_t nr32 = *nr;
+ int r = check_zone_nr2(&nr32, corrected);
+ *nr = (uint16_t)nr32;
+ return r;
+}
+
+/*
+ * read-block reads block nr into the buffer at addr.
+ */
+static void read_block(unsigned nr, void *addr)
+{
+ if (!nr) {
+ memset(addr, 0, BLOCK_SIZE);
+ return;
+ }
+ xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
+ if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
+ printf("%s: bad block %u in file '%s'\n",
+ bb_msg_read_error, nr, current_name);
+ errors_uncorrected = 1;
+ memset(addr, 0, BLOCK_SIZE);
+ }
+}
+
+/*
+ * write_block writes block nr to disk.
+ */
+static void write_block(unsigned nr, void *addr)
+{
+ if (!nr)
+ return;
+ if (nr < FIRSTZONE || nr >= ZONES) {
+ printf("Internal error: trying to write bad block\n"
+ "Write request ignored\n");
+ errors_uncorrected = 1;
+ return;
+ }
+ xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
+ if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
+ printf("%s: bad block %u in file '%s'\n",
+ bb_msg_write_error, nr, current_name);
+ errors_uncorrected = 1;
+ }
+}
+
+/*
+ * map_block calculates the absolute block nr of a block in a file.
+ * It sets 'changed' if the inode has needed changing, and re-writes
+ * any indirect blocks with errors.
+ */
+static int map_block(struct minix1_inode *inode, unsigned blknr)
+{
+ uint16_t ind[BLOCK_SIZE >> 1];
+ int block, result;
+ smallint blk_chg;
+
+ if (blknr < 7)
+ return check_zone_nr(inode->i_zone + blknr, &changed);
+ blknr -= 7;
+ if (blknr < 512) {
+ block = check_zone_nr(inode->i_zone + 7, &changed);
+ goto common;
+ }
+ blknr -= 512;
+ block = check_zone_nr(inode->i_zone + 8, &changed);
+ read_block(block, ind); /* double indirect */
+ blk_chg = 0;
+ result = check_zone_nr(&ind[blknr / 512], &blk_chg);
+ if (blk_chg)
+ write_block(block, ind);
+ block = result;
+ common:
+ read_block(block, ind);
+ blk_chg = 0;
+ result = check_zone_nr(&ind[blknr % 512], &blk_chg);
+ if (blk_chg)
+ write_block(block, ind);
+ return result;
+}
+
+#if ENABLE_FEATURE_MINIX2
+static int map_block2(struct minix2_inode *inode, unsigned blknr)
+{
+ uint32_t ind[BLOCK_SIZE >> 2];
+ int block, result;
+ smallint blk_chg;
+
+ if (blknr < 7)
+ return check_zone_nr2(inode->i_zone + blknr, &changed);
+ blknr -= 7;
+ if (blknr < 256) {
+ block = check_zone_nr2(inode->i_zone + 7, &changed);
+ goto common2;
+ }
+ blknr -= 256;
+ if (blknr < 256 * 256) {
+ block = check_zone_nr2(inode->i_zone + 8, &changed);
+ goto common1;
+ }
+ blknr -= 256 * 256;
+ block = check_zone_nr2(inode->i_zone + 9, &changed);
+ read_block(block, ind); /* triple indirect */
+ blk_chg = 0;
+ result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
+ if (blk_chg)
+ write_block(block, ind);
+ block = result;
+ common1:
+ read_block(block, ind); /* double indirect */
+ blk_chg = 0;
+ result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
+ if (blk_chg)
+ write_block(block, ind);
+ block = result;
+ common2:
+ read_block(block, ind);
+ blk_chg = 0;
+ result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
+ if (blk_chg)
+ write_block(block, ind);
+ return result;
+}
+#endif
+
+static void write_superblock(void)
+{
+ /*
+ * Set the state of the filesystem based on whether or not there
+ * are uncorrected errors. The filesystem valid flag is
+ * unconditionally set if we get this far.
+ */
+ Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
+ if (!errors_uncorrected)
+ Super.s_state &= ~MINIX_ERROR_FS;
+
+ xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
+ if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
+ die("can't write superblock");
+}
+
+static void write_tables(void)
+{
+ write_superblock();
+
+ if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
+ die("can't write inode map");
+ if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
+ die("can't write zone map");
+ if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
+ die("can't write inodes");
+}
+
+static void get_dirsize(void)
+{
+ int block;
+ char blk[BLOCK_SIZE];
+ int size;
+
+#if ENABLE_FEATURE_MINIX2
+ if (version2)
+ block = Inode2[MINIX_ROOT_INO].i_zone[0];
+ else
+#endif
+ block = Inode1[MINIX_ROOT_INO].i_zone[0];
+ read_block(block, blk);
+ for (size = 16; size < BLOCK_SIZE; size <<= 1) {
+ if (strcmp(blk + size + 2, "..") == 0) {
+ dirsize = size;
+ namelen = size - 2;
+ return;
+ }
+ }
+ /* use defaults */
+}
+
+static void read_superblock(void)
+{
+ xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
+ if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
+ die("can't read superblock");
+ /* already initialized to:
+ namelen = 14;
+ dirsize = 16;
+ version2 = 0;
+ */
+ if (MAGIC == MINIX1_SUPER_MAGIC) {
+ } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
+ namelen = 30;
+ dirsize = 32;
+#if ENABLE_FEATURE_MINIX2
+ } else if (MAGIC == MINIX2_SUPER_MAGIC) {
+ version2 = 1;
+ } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
+ namelen = 30;
+ dirsize = 32;
+ version2 = 1;
+#endif
+ } else
+ die("bad magic number in superblock");
+ if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
+ die("only 1k blocks/zones supported");
+ if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
+ die("bad s_imap_blocks field in superblock");
+ if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
+ die("bad s_zmap_blocks field in superblock");
+}
+
+static void read_tables(void)
+{
+ inode_map = xzalloc(IMAPS * BLOCK_SIZE);
+ zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
+ inode_buffer = xmalloc(INODE_BUFFER_SIZE);
+ inode_count = xmalloc(INODES + 1);
+ zone_count = xmalloc(ZONES);
+ if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
+ die("can't read inode map");
+ if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
+ die("can't read zone map");
+ if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
+ die("can't read inodes");
+ if (NORM_FIRSTZONE != FIRSTZONE) {
+ printf("warning: firstzone!=norm_firstzone\n");
+ errors_uncorrected = 1;
+ }
+ get_dirsize();
+ if (OPT_show) {
+ printf("%u inodes\n"
+ "%u blocks\n"
+ "Firstdatazone=%u (%u)\n"
+ "Zonesize=%u\n"
+ "Maxsize=%u\n"
+ "Filesystem state=%u\n"
+ "namelen=%u\n\n",
+ INODES,
+ ZONES,
+ FIRSTZONE, NORM_FIRSTZONE,
+ BLOCK_SIZE << ZONESIZE,
+ MAXSIZE,
+ Super.s_state,
+ namelen);
+ }
+}
+
+static void get_inode_common(unsigned nr, uint16_t i_mode)
+{
+ total++;
+ if (!inode_count[nr]) {
+ if (!inode_in_use(nr)) {
+ printf("Inode %d is marked as 'unused', but it is used "
+ "for file '%s'\n", nr, current_name);
+ if (OPT_repair) {
+ if (ask("Mark as 'in use'", 1))
+ mark_inode(nr);
+ else
+ errors_uncorrected = 1;
+ }
+ }
+ if (S_ISDIR(i_mode))
+ directory++;
+ else if (S_ISREG(i_mode))
+ regular++;
+ else if (S_ISCHR(i_mode))
+ chardev++;
+ else if (S_ISBLK(i_mode))
+ blockdev++;
+ else if (S_ISLNK(i_mode))
+ symlinks++;
+ else if (S_ISSOCK(i_mode));
+ else if (S_ISFIFO(i_mode));
+ else {
+ printf("%s has mode %05o\n", current_name, i_mode);
+ }
+ } else
+ links++;
+ if (!++inode_count[nr]) {
+ printf("Warning: inode count too big\n");
+ inode_count[nr]--;
+ errors_uncorrected = 1;
+ }
+}
+
+static struct minix1_inode *get_inode(unsigned nr)
+{
+ struct minix1_inode *inode;
+
+ if (!nr || nr > INODES)
+ return NULL;
+ inode = Inode1 + nr;
+ get_inode_common(nr, inode->i_mode);
+ return inode;
+}
+
+#if ENABLE_FEATURE_MINIX2
+static struct minix2_inode *get_inode2(unsigned nr)
+{
+ struct minix2_inode *inode;
+
+ if (!nr || nr > INODES)
+ return NULL;
+ inode = Inode2 + nr;
+ get_inode_common(nr, inode->i_mode);
+ return inode;
+}
+#endif
+
+static void check_root(void)
+{
+ struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
+
+ if (!inode || !S_ISDIR(inode->i_mode))
+ die("root inode isn't a directory");
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void check_root2(void)
+{
+ struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
+
+ if (!inode || !S_ISDIR(inode->i_mode))
+ die("root inode isn't a directory");
+}
+#else
+void check_root2(void);
+#endif
+
+static int add_zone_common(int block, smallint *corrected)
+{
+ if (!block)
+ return 0;
+ if (zone_count[block]) {
+ printf("Already used block is reused in file '%s'. ",
+ current_name);
+ if (ask("Clear", 1)) {
+ block = 0;
+ *corrected = 1;
+ return -1; /* "please zero out *znr" */
+ }
+ }
+ if (!zone_in_use(block)) {
+ printf("Block %d in file '%s' is marked as 'unused'. ",
+ block, current_name);
+ if (ask("Correct", 1))
+ mark_zone(block);
+ }
+ if (!++zone_count[block])
+ zone_count[block]--;
+ return block;
+}
+
+static int add_zone(uint16_t *znr, smallint *corrected)
+{
+ int block;
+
+ block = check_zone_nr(znr, corrected);
+ block = add_zone_common(block, corrected);
+ if (block == -1) {
+ *znr = 0;
+ block = 0;
+ }
+ return block;
+}
+
+#if ENABLE_FEATURE_MINIX2
+static int add_zone2(uint32_t *znr, smallint *corrected)
+{
+ int block;
+
+ block = check_zone_nr2(znr, corrected);
+ block = add_zone_common(block, corrected);
+ if (block == -1) {
+ *znr = 0;
+ block = 0;
+ }
+ return block;
+}
+#endif
+
+static void add_zone_ind(uint16_t *znr, smallint *corrected)
+{
+ int i;
+ int block;
+ smallint chg_blk = 0;
+
+ block = add_zone(znr, corrected);
+ if (!block)
+ return;
+ read_block(block, add_zone_ind_blk);
+ for (i = 0; i < (BLOCK_SIZE >> 1); i++)
+ add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
+ if (chg_blk)
+ write_block(block, add_zone_ind_blk);
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void add_zone_ind2(uint32_t *znr, smallint *corrected)
+{
+ int i;
+ int block;
+ smallint chg_blk = 0;
+
+ block = add_zone2(znr, corrected);
+ if (!block)
+ return;
+ read_block(block, add_zone_ind_blk);
+ for (i = 0; i < BLOCK_SIZE >> 2; i++)
+ add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
+ if (chg_blk)
+ write_block(block, add_zone_ind_blk);
+}
+#endif
+
+static void add_zone_dind(uint16_t *znr, smallint *corrected)
+{
+ int i;
+ int block;
+ smallint chg_blk = 0;
+
+ block = add_zone(znr, corrected);
+ if (!block)
+ return;
+ read_block(block, add_zone_dind_blk);
+ for (i = 0; i < (BLOCK_SIZE >> 1); i++)
+ add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
+ if (chg_blk)
+ write_block(block, add_zone_dind_blk);
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void add_zone_dind2(uint32_t *znr, smallint *corrected)
+{
+ int i;
+ int block;
+ smallint chg_blk = 0;
+
+ block = add_zone2(znr, corrected);
+ if (!block)
+ return;
+ read_block(block, add_zone_dind_blk);
+ for (i = 0; i < BLOCK_SIZE >> 2; i++)
+ add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
+ if (chg_blk)
+ write_block(block, add_zone_dind_blk);
+}
+
+static void add_zone_tind2(uint32_t *znr, smallint *corrected)
+{
+ int i;
+ int block;
+ smallint chg_blk = 0;
+
+ block = add_zone2(znr, corrected);
+ if (!block)
+ return;
+ read_block(block, add_zone_tind_blk);
+ for (i = 0; i < BLOCK_SIZE >> 2; i++)
+ add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
+ if (chg_blk)
+ write_block(block, add_zone_tind_blk);
+}
+#endif
+
+static void check_zones(unsigned i)
+{
+ struct minix1_inode *inode;
+
+ if (!i || i > INODES)
+ return;
+ if (inode_count[i] > 1) /* have we counted this file already? */
+ return;
+ inode = Inode1 + i;
+ if (!S_ISDIR(inode->i_mode)
+ && !S_ISREG(inode->i_mode)
+ && !S_ISLNK(inode->i_mode)
+ ) {
+ return;
+ }
+ for (i = 0; i < 7; i++)
+ add_zone(i + inode->i_zone, &changed);
+ add_zone_ind(7 + inode->i_zone, &changed);
+ add_zone_dind(8 + inode->i_zone, &changed);
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void check_zones2(unsigned i)
+{
+ struct minix2_inode *inode;
+
+ if (!i || i > INODES)
+ return;
+ if (inode_count[i] > 1) /* have we counted this file already? */
+ return;
+ inode = Inode2 + i;
+ if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
+ && !S_ISLNK(inode->i_mode))
+ return;
+ for (i = 0; i < 7; i++)
+ add_zone2(i + inode->i_zone, &changed);
+ add_zone_ind2(7 + inode->i_zone, &changed);
+ add_zone_dind2(8 + inode->i_zone, &changed);
+ add_zone_tind2(9 + inode->i_zone, &changed);
+}
+#endif
+
+static void check_file(struct minix1_inode *dir, unsigned offset)
+{
+ struct minix1_inode *inode;
+ int ino;
+ char *name;
+ int block;
+
+ block = map_block(dir, offset / BLOCK_SIZE);
+ read_block(block, check_file_blk);
+ name = check_file_blk + (offset % BLOCK_SIZE) + 2;
+ ino = *(uint16_t *) (name - 2);
+ if (ino > INODES) {
+ printf("%s contains a bad inode number for file '%.*s'. ",
+ current_name, namelen, name);
+ if (ask("Remove", 1)) {
+ *(uint16_t *) (name - 2) = 0;
+ write_block(block, check_file_blk);
+ }
+ ino = 0;
+ }
+ push_filename(name);
+ inode = get_inode(ino);
+ pop_filename();
+ if (!offset) {
+ if (inode && LONE_CHAR(name, '.'))
+ return;
+ printf("%s: bad directory: '.' isn't first\n", current_name);
+ errors_uncorrected = 1;
+ }
+ if (offset == dirsize) {
+ if (inode && strcmp("..", name) == 0)
+ return;
+ printf("%s: bad directory: '..' isn't second\n", current_name);
+ errors_uncorrected = 1;
+ }
+ if (!inode)
+ return;
+ push_filename(name);
+ if (OPT_list) {
+ if (OPT_verbose)
+ printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
+ printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
+ }
+ check_zones(ino);
+ if (inode && S_ISDIR(inode->i_mode))
+ recursive_check(ino);
+ pop_filename();
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void check_file2(struct minix2_inode *dir, unsigned offset)
+{
+ struct minix2_inode *inode;
+ int ino;
+ char *name;
+ int block;
+
+ block = map_block2(dir, offset / BLOCK_SIZE);
+ read_block(block, check_file_blk);
+ name = check_file_blk + (offset % BLOCK_SIZE) + 2;
+ ino = *(uint16_t *) (name - 2);
+ if (ino > INODES) {
+ printf("%s contains a bad inode number for file '%.*s'. ",
+ current_name, namelen, name);
+ if (ask("Remove", 1)) {
+ *(uint16_t *) (name - 2) = 0;
+ write_block(block, check_file_blk);
+ }
+ ino = 0;
+ }
+ push_filename(name);
+ inode = get_inode2(ino);
+ pop_filename();
+ if (!offset) {
+ if (inode && LONE_CHAR(name, '.'))
+ return;
+ printf("%s: bad directory: '.' isn't first\n", current_name);
+ errors_uncorrected = 1;
+ }
+ if (offset == dirsize) {
+ if (inode && strcmp("..", name) == 0)
+ return;
+ printf("%s: bad directory: '..' isn't second\n", current_name);
+ errors_uncorrected = 1;
+ }
+ if (!inode)
+ return;
+ push_filename(name);
+ if (OPT_list) {
+ if (OPT_verbose)
+ printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
+ printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
+ }
+ check_zones2(ino);
+ if (inode && S_ISDIR(inode->i_mode))
+ recursive_check2(ino);
+ pop_filename();
+}
+#endif
+
+static void recursive_check(unsigned ino)
+{
+ struct minix1_inode *dir;
+ unsigned offset;
+
+ dir = Inode1 + ino;
+ if (!S_ISDIR(dir->i_mode))
+ die("internal error");
+ if (dir->i_size < 2 * dirsize) {
+ printf("%s: bad directory: size<32", current_name);
+ errors_uncorrected = 1;
+ }
+ for (offset = 0; offset < dir->i_size; offset += dirsize)
+ check_file(dir, offset);
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void recursive_check2(unsigned ino)
+{
+ struct minix2_inode *dir;
+ unsigned offset;
+
+ dir = Inode2 + ino;
+ if (!S_ISDIR(dir->i_mode))
+ die("internal error");
+ if (dir->i_size < 2 * dirsize) {
+ printf("%s: bad directory: size<32", current_name);
+ errors_uncorrected = 1;
+ }
+ for (offset = 0; offset < dir->i_size; offset += dirsize)
+ check_file2(dir, offset);
+}
+#endif
+
+static int bad_zone(int i)
+{
+ char buffer[BLOCK_SIZE];
+
+ xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
+ return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
+}
+
+static void check_counts(void)
+{
+ int i;
+
+ for (i = 1; i <= INODES; i++) {
+ if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
+ printf("Inode %d has non-zero mode. ", i);
+ if (ask("Clear", 1)) {
+ Inode1[i].i_mode = 0;
+ changed = 1;
+ }
+ }
+ if (!inode_count[i]) {
+ if (!inode_in_use(i))
+ continue;
+ printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
+ if (ask("Clear", 1))
+ unmark_inode(i);
+ continue;
+ }
+ if (!inode_in_use(i)) {
+ printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
+ if (ask("Set", 1))
+ mark_inode(i);
+ }
+ if (Inode1[i].i_nlinks != inode_count[i]) {
+ printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
+ i, Inode1[i].i_mode, Inode1[i].i_nlinks,
+ inode_count[i]);
+ if (ask("Set i_nlinks to count", 1)) {
+ Inode1[i].i_nlinks = inode_count[i];
+ changed = 1;
+ }
+ }
+ }
+ for (i = FIRSTZONE; i < ZONES; i++) {
+ if ((zone_in_use(i) != 0) == zone_count[i])
+ continue;
+ if (!zone_count[i]) {
+ if (bad_zone(i))
+ continue;
+ printf("Zone %d is marked 'in use', but no file uses it. ", i);
+ if (ask("Unmark", 1))
+ unmark_zone(i);
+ continue;
+ }
+ printf("Zone %d: %sin use, counted=%d\n",
+ i, zone_in_use(i) ? "" : "not ", zone_count[i]);
+ }
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void check_counts2(void)
+{
+ int i;
+
+ for (i = 1; i <= INODES; i++) {
+ if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
+ printf("Inode %d has non-zero mode. ", i);
+ if (ask("Clear", 1)) {
+ Inode2[i].i_mode = 0;
+ changed = 1;
+ }
+ }
+ if (!inode_count[i]) {
+ if (!inode_in_use(i))
+ continue;
+ printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
+ if (ask("Clear", 1))
+ unmark_inode(i);
+ continue;
+ }
+ if (!inode_in_use(i)) {
+ printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
+ if (ask("Set", 1))
+ mark_inode(i);
+ }
+ if (Inode2[i].i_nlinks != inode_count[i]) {
+ printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
+ i, Inode2[i].i_mode, Inode2[i].i_nlinks,
+ inode_count[i]);
+ if (ask("Set i_nlinks to count", 1)) {
+ Inode2[i].i_nlinks = inode_count[i];
+ changed = 1;
+ }
+ }
+ }
+ for (i = FIRSTZONE; i < ZONES; i++) {
+ if ((zone_in_use(i) != 0) == zone_count[i])
+ continue;
+ if (!zone_count[i]) {
+ if (bad_zone(i))
+ continue;
+ printf("Zone %d is marked 'in use', but no file uses it. ", i);
+ if (ask("Unmark", 1))
+ unmark_zone(i);
+ continue;
+ }
+ printf("Zone %d: %sin use, counted=%d\n",
+ i, zone_in_use(i) ? "" : "not ", zone_count[i]);
+ }
+}
+#endif
+
+static void check(void)
+{
+ memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
+ memset(zone_count, 0, ZONES * sizeof(*zone_count));
+ check_zones(MINIX_ROOT_INO);
+ recursive_check(MINIX_ROOT_INO);
+ check_counts();
+}
+
+#if ENABLE_FEATURE_MINIX2
+static void check2(void)
+{
+ memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
+ memset(zone_count, 0, ZONES * sizeof(*zone_count));
+ check_zones2(MINIX_ROOT_INO);
+ recursive_check2(MINIX_ROOT_INO);
+ check_counts2();
+}
+#else
+void check2(void);
+#endif
+
+int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
+{
+ struct termios tmp;
+ int retcode = 0;
+
+ xfunc_error_retval = 8;
+
+ INIT_G();
+
+ opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
+ getopt32(argv, OPTION_STR);
+ argv += optind;
+ device_name = argv[0];
+
+ check_mount(); /* trying to check a mounted filesystem? */
+ if (OPT_manual) {
+ if (!isatty(0) || !isatty(1))
+ die("need terminal for interactive repairs");
+ }
+ xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
+
+ /*sync(); paranoia? */
+ read_superblock();
+
+ /*
+ * Determine whether or not we should continue with the checking.
+ * This is based on the status of the filesystem valid and error
+ * flags and whether or not the -f switch was specified on the
+ * command line.
+ */
+ printf("%s: %s\n", applet_name, bb_banner);
+
+ if (!(Super.s_state & MINIX_ERROR_FS)
+ && (Super.s_state & MINIX_VALID_FS) && !OPT_force
+ ) {
+ if (OPT_repair)
+ printf("%s is clean, check is skipped\n", device_name);
+ return 0;
+ } else if (OPT_force)
+ printf("Forcing filesystem check on %s\n", device_name);
+ else if (OPT_repair)
+ printf("Filesystem on %s is dirty, needs checking\n",
+ device_name);
+
+ read_tables();
+
+ if (OPT_manual) {
+ tcgetattr(0, &sv_termios);
+ tmp = sv_termios;
+ tmp.c_lflag &= ~(ICANON | ECHO);
+ tcsetattr_stdin_TCSANOW(&tmp);
+ termios_set = 1;
+ }
+
+ if (version2) {
+ check_root2();
+ check2();
+ } else {
+ check_root();
+ check();
+ }
+
+ if (OPT_verbose) {
+ int i, free_cnt;
+
+ for (i = 1, free_cnt = 0; i <= INODES; i++)
+ if (!inode_in_use(i))
+ free_cnt++;
+ printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
+ 100 * (INODES - free_cnt) / INODES);
+ for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
+ if (!zone_in_use(i))
+ free_cnt++;
+ printf("%6u zones used (%u%%)\n\n"
+ "%6u regular files\n"
+ "%6u directories\n"
+ "%6u character device files\n"
+ "%6u block device files\n"
+ "%6u links\n"
+ "%6u symbolic links\n"
+ "------\n"
+ "%6u files\n",
+ (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
+ regular, directory, chardev, blockdev,
+ links - 2 * directory + 1, symlinks,
+ total - 2 * directory + 1);
+ }
+ if (changed) {
+ write_tables();
+ printf("FILE SYSTEM HAS BEEN CHANGED\n");
+ sync();
+ } else if (OPT_repair)
+ write_superblock();
+
+ if (OPT_manual)
+ tcsetattr_stdin_TCSANOW(&sv_termios);
+
+ if (changed)
+ retcode += 3;
+ if (errors_uncorrected)
+ retcode += 4;
+ return retcode;
+}