/* * fsck.minix.c - a file system consistency checker for Linux. * * (C) 1991, 1992 Linus Torvalds. This file may be redistributed * as per the GNU copyleft. */ /* * 09.11.91 - made the first rudimetary 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 * super-block 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 systemindependent. * (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 . * * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by * Andreas Schwab. * * 1999-02-22 Arkadiusz Miśkiewicz * - added Native Language Support * * 2008-04-06 James Youngman * - Issue better error message if we fail to open the device. * - Restore terminal state if we get a fatal signal. * * * 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). * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "c.h" #include "exitcodes.h" #include "minix_programs.h" #include "nls.h" #include "pathnames.h" #include "bitops.h" #include "ismounted.h" #include "all-io.h" #include "closestream.h" #include "rpmatch.h" #include "strutils.h" #define ROOT_INO 1 #define YESNO_LENGTH 64 /* Global variables used in minix_programs.h inline fuctions */ int fs_version = 1; char *super_block_buffer; static char *inode_buffer; #define Inode (((struct minix_inode *) inode_buffer) - 1) #define Inode2 (((struct minix2_inode *) inode_buffer) - 1) static char *device_name; static int device_fd; static int repair, automatic, verbose, list, show, warn_mode, force; static int directory, regular, blockdev, chardev, links, symlinks, total; static int changed; /* flags if the filesystem has been changed */ static int errors_uncorrected; /* flag if some error was not corrected */ static size_t dirsize = 16; static size_t namelen = 14; static struct termios termios; static volatile sig_atomic_t termios_set; /* File-name data */ #define MAX_DEPTH 50 static int name_depth; static char name_list[MAX_DEPTH][MINIX_NAME_MAX + 1]; /* Copy of the previous, just for error reporting - see get_current_name. This * is a waste of 12kB or so. */ static char current_name[MAX_DEPTH * (MINIX_NAME_MAX + 1) + 1]; static unsigned char *inode_count = NULL; static unsigned char *zone_count = NULL; static void recursive_check(unsigned int ino); static void recursive_check2(unsigned int ino); static char *inode_map; static char *zone_map; #define inode_in_use(x) (isset(inode_map,(x)) != 0) #define zone_in_use(x) (isset(zone_map,(x)-get_first_zone()+1) != 0) #define mark_inode(x) (setbit(inode_map,(x)),changed=1) #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1) #define mark_zone(x) (setbit(zone_map,(x)-get_first_zone()+1),changed=1) #define unmark_zone(x) (clrbit(zone_map,(x)-get_first_zone()+1),changed=1) static void reset(void) { if (termios_set) tcsetattr(STDIN_FILENO, TCSANOW, &termios); } static void fatalsig(int sig) { /* We received a fatal signal. Reset the terminal. Also reset the * signal handler and re-send the signal, so that the parent process * knows which signal actually caused our death. */ signal(sig, SIG_DFL); reset(); raise(sig); } static void __attribute__((__noreturn__)) leave(int status) { reset(); exit(status); } static void usage(FILE *out) { fputs(USAGE_HEADER, out); fprintf(out, _(" %s [options] \n"), program_invocation_short_name); fputs(USAGE_SEPARATOR, out); fputs(_("Check the consistency of a Minix filesystem.\n"), out); fputs(USAGE_OPTIONS, out); fputs(_(" -l, --list list all filenames\n"), out); fputs(_(" -a, --auto automatic repair\n"), out); fputs(_(" -r, --repair interactive repair\n"), out); fputs(_(" -v, --verbose be verbose\n"), out); fputs(_(" -s, --super output super-block information\n"), out); fputs(_(" -m, --uncleared activate mode not cleared warnings\n"), out); fputs(_(" -f, --force force check\n"), out); fputs(USAGE_SEPARATOR, out); fputs(USAGE_HELP, out); fputs(USAGE_VERSION, out); fprintf(out, USAGE_MAN_TAIL("fsck.minix(8)")); leave(out == stderr ? FSCK_EX_USAGE : FSCK_EX_OK); } static void die(const char *fmt, ...) __attribute__ ((__format__(__printf__, 1, 2))); static void die(const char *fmt, ...) { va_list ap; fprintf(stderr, UTIL_LINUX_VERSION); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); fputc('\n', stderr); leave(FSCK_EX_ERROR); } /* This simply goes through the file-name data and prints out the current file. */ static void get_current_name(void) { int i = 0, ct; char *p, *q; q = current_name; while (i < name_depth) { p = name_list[i++]; ct = namelen; *q++ = '/'; while (ct-- && *p) *q++ = *p++; } if (i == 0) *q++ = '/'; *q = 0; } static int ask(const char *string, int def) { int resp; char input[YESNO_LENGTH]; if (!repair) { printf("\n"); errors_uncorrected = 1; return 0; } if (automatic) { printf("\n"); if (!def) errors_uncorrected = 1; return def; } /* TRANSLATORS: these yes no questions uses rpmatch(), and should be * translated. */ printf(def ? _("%s (y/n)? ") : _("%s (n/y)? "), string); fflush(stdout); ignore_result( fgets(input, YESNO_LENGTH, stdin) ); resp = rpmatch(input); switch (resp) { case RPMATCH_INVALID: /* def = def */ break; case RPMATCH_NO: case RPMATCH_YES: def = resp; break; default: /* rpmatch bug? */ abort(); } 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) { int cont; if (!is_mounted(device_name)) return; printf(_("%s is mounted. "), device_name); if (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) cont = ask(_("Do you really want to continue"), 0); else cont = 0; if (!cont) { printf(_("check aborted.\n")); exit(FSCK_EX_OK); } return; } /* 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_nr(unsigned short *nr, int *corrected) { if (!*nr) return 0; if (*nr < get_first_zone()) { get_current_name(); printf(_("Zone nr < FIRSTZONE in file `%s'."), current_name); } else if (*nr >= get_nzones()) { get_current_name(); printf(_("Zone nr >= ZONES in file `%s'."), current_name); } else return *nr; if (ask(_("Remove block"), 1)) { *nr = 0; *corrected = 1; } return 0; } static int check_zone_nr2(unsigned int *nr, int *corrected) { if (!*nr) return 0; if (*nr < get_first_zone()) { get_current_name(); printf(_("Zone nr < FIRSTZONE in file `%s'."), current_name); } else if (*nr >= get_nzones()) { get_current_name(); printf(_("Zone nr >= ZONES in file `%s'."), current_name); } else return *nr; if (ask(_("Remove block"), 1)) { *nr = 0; *corrected = 1; } return 0; } /* read-block reads block nr into the buffer at addr. */ static void read_block(unsigned int nr, char *addr) { if (!nr) { memset(addr, 0, MINIX_BLOCK_SIZE); return; } if (MINIX_BLOCK_SIZE * nr != lseek(device_fd, MINIX_BLOCK_SIZE * nr, SEEK_SET)) { get_current_name(); printf(_("Read error: unable to seek to block in file '%s'\n"), current_name); memset(addr, 0, MINIX_BLOCK_SIZE); errors_uncorrected = 1; } else if (MINIX_BLOCK_SIZE != read(device_fd, addr, MINIX_BLOCK_SIZE)) { get_current_name(); printf(_("Read error: bad block in file '%s'\n"), current_name); memset(addr, 0, MINIX_BLOCK_SIZE); errors_uncorrected = 1; } } /* write_block writes block nr to disk. */ static void write_block(unsigned int nr, char *addr) { if (!nr) return; if (nr < get_first_zone() || nr >= get_nzones()) { printf(_("Internal error: trying to write bad block\n" "Write request ignored\n")); errors_uncorrected = 1; return; } if (MINIX_BLOCK_SIZE * nr != lseek(device_fd, MINIX_BLOCK_SIZE * nr, SEEK_SET)) die(_("seek failed in write_block")); if (MINIX_BLOCK_SIZE != write(device_fd, addr, MINIX_BLOCK_SIZE)) { get_current_name(); printf(_("Write error: bad block in file '%s'\n"), 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 minix_inode *inode, unsigned int blknr) { unsigned short ind[MINIX_BLOCK_SIZE >> 1]; unsigned short dind[MINIX_BLOCK_SIZE >> 1]; int blk_chg, block, result; 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); read_block(block, (char *)ind); blk_chg = 0; result = check_zone_nr(blknr + ind, &blk_chg); if (blk_chg) write_block(block, (char *)ind); return result; } blknr -= 512; block = check_zone_nr(inode->i_zone + 8, &changed); read_block(block, (char *)dind); blk_chg = 0; result = check_zone_nr(dind + (blknr / 512), &blk_chg); if (blk_chg) write_block(block, (char *)dind); block = result; read_block(block, (char *)ind); blk_chg = 0; result = check_zone_nr(ind + (blknr % 512), &blk_chg); if (blk_chg) write_block(block, (char *)ind); return result; } static int map_block2(struct minix2_inode *inode, unsigned int blknr) { unsigned int ind[MINIX_BLOCK_SIZE >> 2]; unsigned int dind[MINIX_BLOCK_SIZE >> 2]; unsigned int tind[MINIX_BLOCK_SIZE >> 2]; int blk_chg, block, result; 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); read_block(block, (char *)ind); blk_chg = 0; result = check_zone_nr2(blknr + ind, &blk_chg); if (blk_chg) write_block(block, (char *)ind); return result; } blknr -= 256; if (blknr < 256 * 256) { block = check_zone_nr2(inode->i_zone + 8, &changed); read_block(block, (char *)dind); blk_chg = 0; result = check_zone_nr2(dind + blknr / 256, &blk_chg); if (blk_chg) write_block(block, (char *)dind); block = result; read_block(block, (char *)ind); blk_chg = 0; result = check_zone_nr2(ind + blknr % 256, &blk_chg); if (blk_chg) write_block(block, (char *)ind); return result; } blknr -= 256 * 256; block = check_zone_nr2(inode->i_zone + 9, &changed); read_block(block, (char *)tind); blk_chg = 0; result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg); if (blk_chg) write_block(block, (char *)tind); block = result; read_block(block, (char *)dind); blk_chg = 0; result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg); if (blk_chg) write_block(block, (char *)dind); block = result; read_block(block, (char *)ind); blk_chg = 0; result = check_zone_nr2(ind + blknr % 256, &blk_chg); if (blk_chg) write_block(block, (char *)ind); return result; } static void write_super_block(void) { /* v3 super block does not track state */ if (fs_version == 3) return; /* 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; if (errors_uncorrected) Super.s_state |= MINIX_ERROR_FS; else Super.s_state &= ~MINIX_ERROR_FS; if (MINIX_BLOCK_SIZE != lseek(device_fd, MINIX_BLOCK_SIZE, SEEK_SET)) die(_("seek failed in write_super_block")); if (MINIX_BLOCK_SIZE != write(device_fd, super_block_buffer, MINIX_BLOCK_SIZE)) die(_("unable to write super-block")); return; } static void write_tables(void) { unsigned long buffsz = get_inode_buffer_size(); unsigned long imaps = get_nimaps(); unsigned long zmaps = get_nzmaps(); write_super_block(); if (write_all(device_fd, inode_map, imaps * MINIX_BLOCK_SIZE)) die(_("Unable to write inode map")); if (write_all(device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE)) die(_("Unable to write zone map")); if (write_all(device_fd, inode_buffer, buffsz)) die(_("Unable to write inodes")); } static void get_dirsize(void) { int block; char blk[MINIX_BLOCK_SIZE]; size_t size; if (fs_version == 2 || fs_version == 3) block = Inode2[ROOT_INO].i_zone[0]; else block = Inode[ROOT_INO].i_zone[0]; read_block(block, blk); for (size = 16; size < MINIX_BLOCK_SIZE; size <<= 1) { if (strcmp(blk + size + 2, "..") == 0) { dirsize = size; namelen = size - 2; return; } } /* use defaults */ } static void read_superblock(void) { if (MINIX_BLOCK_SIZE != lseek(device_fd, MINIX_BLOCK_SIZE, SEEK_SET)) die(_("seek failed")); super_block_buffer = calloc(1, MINIX_BLOCK_SIZE); if (!super_block_buffer) die(_("unable to alloc buffer for superblock")); if (MINIX_BLOCK_SIZE != read(device_fd, super_block_buffer, MINIX_BLOCK_SIZE)) die(_("unable to read super block")); if (Super.s_magic == MINIX_SUPER_MAGIC) { namelen = 14; dirsize = 16; fs_version = 1; } else if (Super.s_magic == MINIX_SUPER_MAGIC2) { namelen = 30; dirsize = 32; fs_version = 1; } else if (Super.s_magic == MINIX2_SUPER_MAGIC) { namelen = 14; dirsize = 16; fs_version = 2; } else if (Super.s_magic == MINIX2_SUPER_MAGIC2) { namelen = 30; dirsize = 32; fs_version = 2; } else if (Super3.s_magic == MINIX3_SUPER_MAGIC) { namelen = 60; dirsize = 64; fs_version = 3; } else die(_("bad magic number in super-block")); if (get_zone_size() != 0 || MINIX_BLOCK_SIZE != 1024) die(_("Only 1k blocks/zones supported")); if (get_nimaps() * MINIX_BLOCK_SIZE * 8 < get_ninodes() + 1) die(_("bad s_imap_blocks field in super-block")); if (get_nzmaps() * MINIX_BLOCK_SIZE * 8 < get_nzones() - get_first_zone() + 1) die(_("bad s_zmap_blocks field in super-block")); } static void read_tables(void) { unsigned long inodes = get_ninodes(); size_t buffsz = get_inode_buffer_size(); off_t norm_first_zone = first_zone_data(); off_t first_zone = get_first_zone(); unsigned long zones = get_nzones(); unsigned long imaps = get_nimaps(); unsigned long zmaps = get_nzmaps(); ssize_t rc; inode_map = malloc(imaps * MINIX_BLOCK_SIZE); if (!inode_map) die(_("Unable to allocate buffer for inode map")); zone_map = malloc(zmaps * MINIX_BLOCK_SIZE); if (!zone_map) die(_("Unable to allocate buffer for zone map")); inode_buffer = malloc(buffsz); if (!inode_buffer) die(_("Unable to allocate buffer for inodes")); inode_count = calloc(1, inodes + 1); if (!inode_count) die(_("Unable to allocate buffer for inode count")); zone_count = calloc(1, zones); if (!zone_count) die(_("Unable to allocate buffer for zone count")); rc = read(device_fd, inode_map, imaps * MINIX_BLOCK_SIZE); if (rc < 0 || imaps * MINIX_BLOCK_SIZE != (size_t) rc) die(_("Unable to read inode map")); rc = read(device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE); if (rc < 0 || zmaps * MINIX_BLOCK_SIZE != (size_t) rc) die(_("Unable to read zone map")); rc = read(device_fd, inode_buffer, buffsz); if (rc < 0 || buffsz != (size_t) rc) die(_("Unable to read inodes")); if (norm_first_zone != first_zone) { printf(_("Warning: Firstzone != Norm_firstzone\n")); errors_uncorrected = 1; } get_dirsize(); if (show) { printf(_("%ld inodes\n"), inodes); printf(_("%ld blocks\n"), zones); printf(_("Firstdatazone=%jd (%jd)\n"), (intmax_t)first_zone, (intmax_t)norm_first_zone); printf(_("Zonesize=%d\n"), MINIX_BLOCK_SIZE << get_zone_size()); printf(_("Maxsize=%zu\n"), get_max_size()); if (fs_version < 3) printf(_("Filesystem state=%d\n"), Super.s_state); printf(_("namelen=%zd\n\n"), namelen); } } static struct minix_inode * get_inode(unsigned int nr) { struct minix_inode *inode; if (!nr || nr > get_ninodes()) return NULL; total++; inode = Inode + nr; if (!inode_count[nr]) { if (!inode_in_use(nr)) { get_current_name(); printf(_("Inode %d marked unused, " "but used for file '%s'\n"), nr, current_name); if (repair) { if (ask(_("Mark in use"), 1)) mark_inode(nr); } else { errors_uncorrected = 1; } } if (S_ISDIR(inode->i_mode)) directory++; else if (S_ISREG(inode->i_mode)) regular++; else if (S_ISCHR(inode->i_mode)) chardev++; else if (S_ISBLK(inode->i_mode)) blockdev++; else if (S_ISLNK(inode->i_mode)) symlinks++; else if (S_ISSOCK(inode->i_mode)) ; else if (S_ISFIFO(inode->i_mode)) ; else { get_current_name(); printf(_("The file `%s' has mode %05o\n"), current_name, inode->i_mode); } } else links++; if (!++inode_count[nr]) { printf(_("Warning: inode count too big.\n")); inode_count[nr]--; errors_uncorrected = 1; } return inode; } static struct minix2_inode * get_inode2(unsigned int nr) { struct minix2_inode *inode; if (!nr || nr > get_ninodes()) return NULL; total++; inode = Inode2 + nr; if (!inode_count[nr]) { if (!inode_in_use(nr)) { get_current_name(); printf(_("Inode %d marked unused, " "but used for file '%s'\n"), nr, current_name); if (repair) { if (ask(_("Mark in use"), 1)) mark_inode(nr); else errors_uncorrected = 1; } } if (S_ISDIR(inode->i_mode)) directory++; else if (S_ISREG(inode->i_mode)) regular++; else if (S_ISCHR(inode->i_mode)) chardev++; else if (S_ISBLK(inode->i_mode)) blockdev++; else if (S_ISLNK(inode->i_mode)) symlinks++; else if (S_ISSOCK(inode->i_mode)) ; else if (S_ISFIFO(inode->i_mode)) ; else { get_current_name(); printf(_("The file `%s' has mode %05o\n"), current_name, inode->i_mode); } } else links++; if (!++inode_count[nr]) { printf(_("Warning: inode count too big.\n")); inode_count[nr]--; errors_uncorrected = 1; } return inode; } static void check_root(void) { struct minix_inode *inode = Inode + ROOT_INO; if (!inode || !S_ISDIR(inode->i_mode)) die(_("root inode isn't a directory")); } static void check_root2(void) { struct minix2_inode *inode = Inode2 + ROOT_INO; if (!inode || !S_ISDIR(inode->i_mode)) die(_("root inode isn't a directory")); } static int add_zone(unsigned short *znr, int *corrected) { int block; block = check_zone_nr(znr, corrected); if (!block) return 0; if (zone_count[block]) { get_current_name(); printf(_("Block has been used before. Now in file `%s'."), current_name); if (ask(_("Clear"), 1)) { *znr = 0; block = 0; *corrected = 1; } } if (!block) return 0; if (!zone_in_use(block)) { get_current_name(); printf(_("Block %d in file `%s' is marked not in use."), block, current_name); if (ask(_("Correct"), 1)) mark_zone(block); } if (!++zone_count[block]) zone_count[block]--; return block; } static int add_zone2(unsigned int *znr, int *corrected) { int block; block = check_zone_nr2(znr, corrected); if (!block) return 0; if (zone_count[block]) { get_current_name(); printf(_("Block has been used before. Now in file `%s'."), current_name); if (ask(_("Clear"), 1)) { *znr = 0; block = 0; *corrected = 1; } } if (!block) return 0; if (!zone_in_use(block)) { get_current_name(); printf(_("Block %d in file `%s' is marked not in use."), block, current_name); if (ask(_("Correct"), 1)) mark_zone(block); } if (!++zone_count[block]) zone_count[block]--; return block; } static void add_zone_ind(unsigned short *znr, int *corrected) { static char blk[MINIX_BLOCK_SIZE]; int i, chg_blk = 0; int block; block = add_zone(znr, corrected); if (!block) return; read_block(block, blk); for (i = 0; i < (MINIX_BLOCK_SIZE >> 1); i++) add_zone(i + (unsigned short *)blk, &chg_blk); if (chg_blk) write_block(block, blk); } static void add_zone_ind2(unsigned int *znr, int *corrected) { static char blk[MINIX_BLOCK_SIZE]; int i, chg_blk = 0; int block; block = add_zone2(znr, corrected); if (!block) return; read_block(block, blk); for (i = 0; i < MINIX_BLOCK_SIZE >> 2; i++) add_zone2(i + (unsigned int *)blk, &chg_blk); if (chg_blk) write_block(block, blk); } static void add_zone_dind(unsigned short *znr, int *corrected) { static char blk[MINIX_BLOCK_SIZE]; int i, blk_chg = 0; int block; block = add_zone(znr, corrected); if (!block) return; read_block(block, blk); for (i = 0; i < (MINIX_BLOCK_SIZE >> 1); i++) add_zone_ind(i + (unsigned short *)blk, &blk_chg); if (blk_chg) write_block(block, blk); } static void add_zone_dind2(unsigned int *znr, int *corrected) { static char blk[MINIX_BLOCK_SIZE]; int i, blk_chg = 0; int block; block = add_zone2(znr, corrected); if (!block) return; read_block(block, blk); for (i = 0; i < MINIX_BLOCK_SIZE >> 2; i++) add_zone_ind2(i + (unsigned int *)blk, &blk_chg); if (blk_chg) write_block(block, blk); } static void add_zone_tind2(unsigned int *znr, int *corrected) { static char blk[MINIX_BLOCK_SIZE]; int i, blk_chg = 0; int block; block = add_zone2(znr, corrected); if (!block) return; read_block(block, blk); for (i = 0; i < MINIX_BLOCK_SIZE >> 2; i++) add_zone_dind2(i + (unsigned int *)blk, &blk_chg); if (blk_chg) write_block(block, blk); } static void check_zones(unsigned int i) { struct minix_inode *inode; if (!i || i > get_ninodes()) return; if (inode_count[i] > 1) /* have we counted this file already? */ return; inode = Inode + 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); } static void check_zones2(unsigned int i) { struct minix2_inode *inode; if (!i || i > get_ninodes()) 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); } static void check_file(struct minix_inode *dir, unsigned int offset) { static char blk[MINIX_BLOCK_SIZE + 2]; struct minix_inode *inode; unsigned int ino; char *name; int block; block = map_block(dir, offset / MINIX_BLOCK_SIZE); read_block(block, blk); name = blk + (offset % MINIX_BLOCK_SIZE) + 2; ino = *(unsigned short *)(name - 2); if (ino > get_ninodes()) { get_current_name(); printf(_("The directory '%s' contains a bad inode number " "for file '%.*s'."), current_name, (int)namelen, name); if (ask(_(" Remove"), 1)) { *(unsigned short *)(name - 2) = 0; write_block(block, blk); } ino = 0; } if (name_depth < MAX_DEPTH) xstrncpy(name_list[name_depth], name, namelen); else return; name_depth++; inode = get_inode(ino); name_depth--; if (!offset) { if (!inode || strcmp(".", name)) { get_current_name(); printf(_("%s: bad directory: '.' isn't first\n"), current_name); errors_uncorrected = 1; } else return; } if (offset == dirsize) { if (!inode || strcmp("..", name)) { get_current_name(); printf(_("%s: bad directory: '..' isn't second\n"), current_name); errors_uncorrected = 1; } else return; } if (!inode) return; if (name_depth < MAX_DEPTH) xstrncpy(name_list[name_depth], name, namelen); else return; name_depth++; if (list) { if (verbose) printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); get_current_name(); printf("%s", current_name); if (S_ISDIR(inode->i_mode)) printf(":\n"); else printf("\n"); } check_zones(ino); if (inode && S_ISDIR(inode->i_mode)) recursive_check(ino); name_depth--; return; } static void check_file2(struct minix2_inode *dir, unsigned int offset) { static char blk[MINIX_BLOCK_SIZE + 4]; struct minix2_inode *inode; ino_t ino; char *name; int block; const int version_offset = fs_version == 3 ? 4 : 2; block = map_block2(dir, offset / MINIX_BLOCK_SIZE); read_block(block, blk); name = blk + (offset % MINIX_BLOCK_SIZE) + version_offset; ino = version_offset == 4 ? *(uint32_t *)(name - version_offset) : *(uint16_t *)(name - version_offset); if (ino > get_ninodes()) { get_current_name(); printf(_("The directory '%s' contains a bad inode number " "for file '%.*s'."), current_name, (int)namelen, name); if (ask(_(" Remove"), 1)) { memset(name - version_offset, 0, version_offset); write_block(block, blk); } ino = 0; } if (name_depth < MAX_DEPTH) xstrncpy(name_list[name_depth], name, namelen); else return; name_depth++; inode = get_inode2(ino); name_depth--; if (!offset) { if (!inode || strcmp(".", name)) { get_current_name(); printf(_("%s: bad directory: '.' isn't first\n"), current_name); errors_uncorrected = 1; } else return; } if (offset == dirsize) { if (!inode || strcmp("..", name)) { get_current_name(); printf(_("%s: bad directory: '..' isn't second\n"), current_name); errors_uncorrected = 1; } else return; } if (!inode) return; name_depth++; if (list) { if (verbose) printf("%6ju %07o %3d ", (uintmax_t)ino, inode->i_mode, inode->i_nlinks); get_current_name(); printf("%s", current_name); if (S_ISDIR(inode->i_mode)) printf(":\n"); else printf("\n"); } check_zones2(ino); if (inode && S_ISDIR(inode->i_mode)) recursive_check2(ino); name_depth--; return; } static void recursive_check(unsigned int ino) { struct minix_inode *dir; off_t offset; dir = Inode + ino; if (!S_ISDIR(dir->i_mode)) die(_("internal error")); if (dir->i_size < 2 * dirsize) { get_current_name(); printf(_("%s: bad directory: size < 32"), current_name); errors_uncorrected = 1; } for (offset = 0; offset < dir->i_size; offset += dirsize) check_file(dir, offset); } static void recursive_check2(unsigned int ino) { struct minix2_inode *dir; off_t offset; dir = Inode2 + ino; if (!S_ISDIR(dir->i_mode)) die(_("internal error")); if (dir->i_size < 2 * dirsize) { get_current_name(); printf(_("%s: bad directory: size < 32"), current_name); errors_uncorrected = 1; } for (offset = 0; offset < dir->i_size; offset += dirsize) check_file2(dir, offset); } static int bad_zone(int i) { char buffer[1024]; if (MINIX_BLOCK_SIZE * i != lseek(device_fd, MINIX_BLOCK_SIZE * i, SEEK_SET)) die(_("seek failed in bad_zone")); return (MINIX_BLOCK_SIZE != read(device_fd, buffer, MINIX_BLOCK_SIZE)); } static void check_counts(void) { unsigned long i; for (i = 1; i <= get_ninodes(); i++) { if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) { printf(_("Inode %lu mode not cleared."), i); if (ask(_("Clear"), 1)) { Inode[i].i_mode = 0; changed = 1; } } if (!inode_count[i]) { if (!inode_in_use(i)) continue; printf(_("Inode %lu not used, marked used in the bitmap."), i); if (ask(_("Clear"), 1)) unmark_inode(i); continue; } if (!inode_in_use(i)) { printf(_("Inode %lu used, marked unused in the bitmap."), i); if (ask(_("Set"), 1)) mark_inode(i); } if (Inode[i].i_nlinks != inode_count[i]) { printf(_("Inode %lu (mode = %07o), i_nlinks=%d, counted=%d."), i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]); if (ask(_("Set i_nlinks to count"), 1)) { Inode[i].i_nlinks = inode_count[i]; changed = 1; } } } for (i = get_first_zone(); i < get_nzones(); i++) { if (zone_in_use(i) == zone_count[i]) continue; if (!zone_count[i]) { if (bad_zone(i)) continue; printf(_("Zone %lu: marked in use, no file uses it."), i); if (ask(_("Unmark"), 1)) unmark_zone(i); continue; } if (zone_in_use(i)) printf(_("Zone %lu: in use, counted=%d\n"), i, zone_count[i]); else printf(_("Zone %lu: not in use, counted=%d\n"), i, zone_count[i]); } } static void check_counts2(void) { unsigned long i; for (i = 1; i <= get_ninodes(); i++) { if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) { printf(_("Inode %lu mode not cleared."), i); if (ask(_("Clear"), 1)) { Inode2[i].i_mode = 0; changed = 1; } } if (!inode_count[i]) { if (!inode_in_use(i)) continue; printf(_("Inode %lu not used, marked used in the bitmap."), i); if (ask(_("Clear"), 1)) unmark_inode(i); continue; } if (!inode_in_use(i)) { printf(_("Inode %lu used, marked unused in the bitmap."), i); if (ask(_("Set"), 1)) mark_inode(i); } if (Inode2[i].i_nlinks != inode_count[i]) { printf(_("Inode %lu (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 = get_first_zone(); i < get_nzones(); i++) { if (zone_in_use(i) == zone_count[i]) continue; if (!zone_count[i]) { if (bad_zone(i)) continue; printf(_("Zone %lu: marked in use, no file uses it."), i); if (ask(_("Unmark"), 1)) unmark_zone(i); continue; } if (zone_in_use(i)) printf(_("Zone %lu: in use, counted=%d\n"), i, zone_count[i]); else printf(_("Zone %lu: not in use, counted=%d\n"), i, zone_count[i]); } } static void check(void) { memset(inode_count, 0, (get_ninodes() + 1) * sizeof(*inode_count)); memset(zone_count, 0, get_nzones() * sizeof(*zone_count)); check_zones(ROOT_INO); recursive_check(ROOT_INO); check_counts(); } static void check2(void) { memset(inode_count, 0, (get_ninodes() + 1) * sizeof(*inode_count)); memset(zone_count, 0, get_nzones() * sizeof(*zone_count)); check_zones2(ROOT_INO); recursive_check2(ROOT_INO); check_counts2(); } int main(int argc, char **argv) { struct termios tmp; int count; int retcode = FSCK_EX_OK; int i; static const struct option longopts[] = { {"list", no_argument, NULL, 'l'}, {"auto", no_argument, NULL, 'a'}, {"repair", no_argument, NULL, 'r'}, {"verbose", no_argument, NULL, 'v'}, {"super", no_argument, NULL, 's'}, {"uncleared", no_argument, NULL, 'm'}, {"force", no_argument, NULL, 'f'}, {"version", no_argument, NULL, 'V'}, {"help", no_argument, NULL, 'h'}, {NULL, 0, NULL, 0} }; setlocale(LC_ALL, ""); bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); atexit(close_stdout); if (INODE_SIZE * MINIX_INODES_PER_BLOCK != MINIX_BLOCK_SIZE) die(_("bad inode size")); if (INODE2_SIZE * MINIX2_INODES_PER_BLOCK != MINIX_BLOCK_SIZE) die(_("bad v2 inode size")); while ((i = getopt_long(argc, argv, "larvsmfVh", longopts, NULL)) != -1) switch (i) { case 'l': list = 1; break; case 'a': automatic = 1; repair = 1; break; case 'r': automatic = 0; repair = 1; break; case 'v': verbose = 1; break; case 's': show = 1; break; case 'm': warn_mode = 1; break; case 'f': force = 1; break; case 'V': printf(UTIL_LINUX_VERSION); return FSCK_EX_OK; case 'h': usage(stdout); default: usage(stderr); } argc -= optind; argv += optind; if (0 < argc) { device_name = argv[0]; } else usage(stderr); check_mount(); /* trying to check a mounted filesystem? */ if (repair && !automatic) { if (!isatty(STDIN_FILENO) || !isatty(STDOUT_FILENO)) die(_("need terminal for interactive repairs")); } device_fd = open(device_name, repair ? O_RDWR : O_RDONLY); if (device_fd < 0) die(_("cannot open %s: %s"), device_name, strerror(errno)); for (count = 0; count < 3; count++) sync(); 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. */ if (fs_version < 3 && !(Super.s_state & MINIX_ERROR_FS) && (Super.s_state & MINIX_VALID_FS) && !force) { if (repair) printf(_("%s is clean, no check.\n"), device_name); return retcode; } else if (force) printf(_("Forcing filesystem check on %s.\n"), device_name); else if (repair) printf(_("Filesystem on %s is dirty, needs checking.\n"), device_name); read_tables(); /* Restore the terminal state on fatal signals. We don't do this for * SIGALRM, SIGUSR1 or SIGUSR2. */ signal(SIGINT, fatalsig); signal(SIGQUIT, fatalsig); signal(SIGTERM, fatalsig); if (repair && !automatic) { tcgetattr(STDIN_FILENO, &termios); tmp = termios; tmp.c_lflag &= ~(ICANON | ECHO); tcsetattr(STDIN_FILENO, TCSANOW, &tmp); termios_set = 1; } if (fs_version == 2 || fs_version == 3) { check_root2(); check2(); } else { check_root(); check(); } if (verbose) { unsigned long inode, free; for (inode = 1, free = 0; inode <= get_ninodes(); inode++) if (!inode_in_use(inode)) free++; printf(_("\n%6ld inodes used (%ld%%)\n"), (get_ninodes() - free), 100 * (get_ninodes() - free) / get_ninodes()); for (inode = get_first_zone(), free = 0; inode < get_nzones(); inode++) if (!zone_in_use(inode)) free++; printf(_("%6ld zones used (%ld%%)\n"), (get_nzones() - free), 100 * (get_nzones() - free) / get_nzones()); printf(_("\n%6d regular files\n" "%6d directories\n" "%6d character device files\n" "%6d block device files\n" "%6d links\n" "%6d symbolic links\n" "------\n" "%6d files\n"), regular, directory, chardev, blockdev, links - 2 * directory + 1, symlinks, total - 2 * directory + 1); } if (changed) { write_tables(); printf(_("----------------------------\n" "FILE SYSTEM HAS BEEN CHANGED\n" "----------------------------\n")); for (count = 0; count < 3; count++) sync(); } else if (repair) write_super_block(); if (repair && !automatic) tcsetattr(STDIN_FILENO, TCSANOW, &termios); if (close_fd(device_fd) != 0) err(FSCK_EX_ERROR, _("write failed")); if (changed) retcode += 3; if (errors_uncorrected) retcode += 4; return retcode; }