diff options
| -rw-r--r-- | Makefile.am | 4 | ||||
| -rw-r--r-- | configure.ac | 17 | ||||
| -rw-r--r-- | fsck/Makefile.am | 13 | ||||
| -rw-r--r-- | fsck/base_device.c | 169 | ||||
| -rw-r--r-- | fsck/fsck.8 | 417 | ||||
| -rw-r--r-- | fsck/fsck.c | 1326 | ||||
| -rw-r--r-- | fsck/fsck.h | 73 | ||||
| -rw-r--r-- | include/ismounted.h | 6 | ||||
| -rw-r--r-- | lib/ismounted.c | 199 |
9 files changed, 2222 insertions, 2 deletions
diff --git a/Makefile.am b/Makefile.am index 00ae9df7f..72a0a8299 100644 --- a/Makefile.am +++ b/Makefile.am @@ -29,6 +29,10 @@ if BUILD_MOUNT SUBDIRS += mount endif +if BUILD_FSCK +SUBDIRS += fsck +endif + ACLOCAL_AMFLAGS = -I m4 EXTRA_DIST = \ diff --git a/configure.ac b/configure.ac index e5e4a5b97..ac7d238cc 100644 --- a/configure.ac +++ b/configure.ac @@ -79,7 +79,9 @@ AC_CHECK_HEADERS( linux/tiocl.h \ linux/version.h \ locale.h \ + stdlib.h \ pty.h \ + mntent.h \ rpcsvc/nfs_prot.h \ scsi/scsi.h \ stdlib.h \ @@ -205,7 +207,6 @@ AC_ARG_ENABLE([mount], AS_HELP_STRING([--disable-mount], [do not build mount utilities]), [], enable_mount=check ) - build_mount=yes if test "${enable_mount}" = "no"; then build_mount=no @@ -217,10 +218,21 @@ else AC_MSG_WARN([non-linux system; do not build mount utilities]) build_mount=no fi - AM_CONDITIONAL(BUILD_MOUNT, test "x$build_mount" = xyes) +AC_ARG_ENABLE([fsck], + AS_HELP_STRING([--enable-fsck], [do build fsck]), + [], enable_fsck=no +) +if test "x$enable_fsck" = xyes; then + if test "x$have_blkid" = xno && test "x$have_volume_id" = xno; then + AC_MSG_ERROR([libblkid or libvolume_id is needed to build util-linux-ng fsck]) + fi +fi +AM_CONDITIONAL(BUILD_FSCK, test "x$enable_fsck" = xyes) + + dnl UTIL_PKG_STATIC(VARIABLE, MODULES) dnl ---------------------------------- AC_DEFUN([UTIL_PKG_STATIC], [ @@ -751,6 +763,7 @@ AC_CONFIG_FILES([ Makefile disk-utils/Makefile fdisk/Makefile +fsck/Makefile getopt/Makefile hwclock/Makefile include/Makefile diff --git a/fsck/Makefile.am b/fsck/Makefile.am new file mode 100644 index 000000000..7f9d4ea1c --- /dev/null +++ b/fsck/Makefile.am @@ -0,0 +1,13 @@ +include $(top_srcdir)/config/include-Makefile.am + +sbin_PROGRAMS = fsck +dist_man_MANS = fsck.8 + +fsck_SOURCES = base_device.c fsck.c fsck.h ../lib/ismounted.c +fsck_LDADD = +fsck_CFLAGS = + +if HAVE_BLKID +fsck_LDADD += $(BLKID_LIBS) +fsck_CFLAGS += $(BLKID_CFLAGS) +endif diff --git a/fsck/base_device.c b/fsck/base_device.c new file mode 100644 index 000000000..aad2ba058 --- /dev/null +++ b/fsck/base_device.c @@ -0,0 +1,169 @@ +/* + * base_device.c + * + * Return the "base device" given a particular device; this is used to + * assure that we only fsck one partition on a particular drive at any + * one time. Otherwise, the disk heads will be seeking all over the + * place. If the base device can not be determined, return NULL. + * + * The base_device() function returns an allocated string which must + * be freed. + * + * Written by Theodore Ts'o, <tytso@mit.edu> + * + * Copyright (C) 2000 Theodore Ts'o. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + */ +#include <stdio.h> +#if HAVE_UNISTD_H +#include <unistd.h> +#endif +#if HAVE_STDLIB_H +#include <stdlib.h> +#endif +#include <ctype.h> +#include <string.h> + +#include "fsck.h" + +/* + * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3 + * pathames. + */ +static const char *devfs_hier[] = { + "host", "bus", "target", "lun", 0 +}; + +char *base_device(const char *device) +{ + char *str, *cp; + const char **hier, *disk; + int len; + + str = malloc(strlen(device)+1); + if (!str) + return NULL; + strcpy(str, device); + cp = str; + + /* Skip over /dev/; if it's not present, give up. */ + if (strncmp(cp, "/dev/", 5) != 0) + goto errout; + cp += 5; + + /* Skip over /dev/dsk/... */ + if (strncmp(cp, "dsk/", 4) == 0) + cp += 4; + + /* + * For md devices, we treat them all as if they were all + * on one disk, since we don't know how to parallelize them. + */ + if (cp[0] == 'm' && cp[1] == 'd') { + *(cp+2) = 0; + return str; + } + + /* Handle DAC 960 devices */ + if (strncmp(cp, "rd/", 3) == 0) { + cp += 3; + if (cp[0] != 'c' || cp[2] != 'd' || + !isdigit(cp[1]) || !isdigit(cp[3])) + goto errout; + *(cp+4) = 0; + return str; + } + + /* Now let's handle /dev/hd* and /dev/sd* devices.... */ + if ((cp[0] == 'h' || cp[0] == 's') && (cp[1] == 'd')) { + cp += 2; + /* If there's a single number after /dev/hd, skip it */ + if (isdigit(*cp)) + cp++; + /* What follows must be an alpha char, or give up */ + if (!isalpha(*cp)) + goto errout; + *(cp + 1) = 0; + return str; + } + + /* Now let's handle devfs (ugh) names */ + len = 0; + if (strncmp(cp, "ide/", 4) == 0) + len = 4; + if (strncmp(cp, "scsi/", 5) == 0) + len = 5; + if (len) { + cp += len; + /* + * Now we proceed down the expected devfs hierarchy. + * i.e., .../host1/bus2/target3/lun4/... + * If we don't find the expected token, followed by + * some number of digits at each level, abort. + */ + for (hier = devfs_hier; *hier; hier++) { + len = strlen(*hier); + if (strncmp(cp, *hier, len) != 0) + goto errout; + cp += len; + while (*cp != '/' && *cp != 0) { + if (!isdigit(*cp)) + goto errout; + cp++; + } + cp++; + } + *(cp - 1) = 0; + return str; + } + + /* Now handle devfs /dev/disc or /dev/disk names */ + disk = 0; + if (strncmp(cp, "discs/", 6) == 0) + disk = "disc"; + else if (strncmp(cp, "disks/", 6) == 0) + disk = "disk"; + if (disk) { + cp += 6; + if (strncmp(cp, disk, 4) != 0) + goto errout; + cp += 4; + while (*cp != '/' && *cp != 0) { + if (!isdigit(*cp)) + goto errout; + cp++; + } + *cp = 0; + return str; + } + +errout: + free(str); + return NULL; +} + +#ifdef DEBUG +int main(int argc, char** argv) +{ + const char *base; + char buf[256], *cp; + + while (1) { + if (fgets(buf, sizeof(buf), stdin) == NULL) + break; + cp = strchr(buf, '\n'); + if (cp) + *cp = 0; + cp = strchr(buf, '\t'); + if (cp) + *cp = 0; + base = base_device(buf); + printf("%s\t%s\n", buf, base ? base : "NONE"); + } + exit(0); +} +#endif diff --git a/fsck/fsck.8 b/fsck/fsck.8 new file mode 100644 index 000000000..abfdeed06 --- /dev/null +++ b/fsck/fsck.8 @@ -0,0 +1,417 @@ +.\" -*- nroff -*- +.\" Copyright 1993, 1994, 1995 by Theodore Ts'o. All Rights Reserved. +.\" This file may be copied under the terms of the GNU Public License. +.\" +.TH FSCK 8 "February 2009" "Linux" "MAINTENANCE COMMANDS" +.SH NAME +fsck \- check and repair a Linux file system +.SH SYNOPSIS +.B fsck +[ +.B \-sAVRTMNP +] +[ +.B \-C +[ +.I fd +] +] +[ +.B \-t +.I fstype +] +.I [filesys ... ] +[\-\-] [ +.B fs-specific-options +] +.SH DESCRIPTION +.B fsck +is used to check and optionally repair one or more Linux file systems. +.I filesys +can be a device name (e.g. +.IR /dev/hdc1 ", " /dev/sdb2 ), +a mount point (e.g. +.IR / ", " /usr ", " /home ), +or an ext2 label or UUID specifier (e.g. +UUID=8868abf6-88c5-4a83-98b8-bfc24057f7bd or LABEL=root). +Normally, the +.B fsck +program will try to handle filesystems on different physical disk drives +in parallel to reduce the total amount of time needed to check all of the +filesystems. +.PP +If no filesystems are specified on the command line, and the +.B \-A +option is not specified, +.B fsck +will default to checking filesystems in +.B /etc/fstab +serially. This is equivalent to the +.B \-As +options. +.PP +The exit code returned by +.B fsck +is the sum of the following conditions: +.br +\ 0\ \-\ No errors +.br +\ 1\ \-\ File system errors corrected +.br +\ 2\ \-\ System should be rebooted +.br +\ 4\ \-\ File system errors left uncorrected +.br +\ 8\ \-\ Operational error +.br +\ 16\ \-\ Usage or syntax error +.br +\ 32\ \-\ Fsck canceled by user request +.br +\ 128\ \-\ Shared library error +.br +The exit code returned when multiple file systems are checked +is the bit-wise OR of the exit codes for each +file system that is checked. +.PP +In actuality, +.B fsck +is simply a front-end for the various file system checkers +(\fBfsck\fR.\fIfstype\fR) available under Linux. The file +system-specific checker is searched for in +.I /sbin +first, then in +.I /etc/fs +and +.IR /etc , +and finally in the directories listed in the PATH environment +variable. Please see the file system-specific checker manual pages for +further details. +.SH OPTIONS +.TP +.B \-s +Serialize +.B fsck +operations. This is a good idea if you are checking multiple +filesystems and the checkers are in an interactive mode. (Note: +.BR e2fsck (8) +runs in an interactive mode by default. To make +.BR e2fsck (8) +run in a non-interactive mode, you must either specify the +.B \-p +or +.B \-a +option, if you wish for errors to be corrected automatically, or the +.B \-n +option if you do not.) +.TP +.BI \-t " fslist" +Specifies the type(s) of file system to be checked. When the +.B \-A +flag is specified, only filesystems that match +.I fslist +are checked. The +.I fslist +parameter is a comma-separated list of filesystems and options +specifiers. All of the filesystems in this comma-separated list may be +prefixed by a negation operator +.RB ' no ' +or +.RB ' ! ', +which requests that only those filesystems not listed in +.I fslist +will be checked. If all of the filesystems in +.I fslist +are not prefixed by a negation operator, then only those filesystems +listed +in +.I fslist +will be checked. +.sp +Options specifiers may be included in the comma-separated +.IR fslist . +They must have the format +.BI opts= fs-option\fR. +If an options specifier is present, then only filesystems which contain +.I fs-option +in their mount options field of +.B /etc/fstab +will be checked. If the options specifier is prefixed by a negation +operator, then only +those filesystems that do not have +.I fs-option +in their mount options field of +.B /etc/fstab +will be checked. +.sp +For example, if +.B opts=ro +appears in +.IR fslist , +then only filesystems listed in +.B /etc/fstab +with the +.B ro +option will be checked. +.sp +For compatibility with Mandrake distributions whose boot scripts +depend upon an unauthorized UI change to the +.B fsck +program, if a filesystem type of +.B loop +is found in +.IR fslist , +it is treated as if +.B opts=loop +were specified as an argument to the +.B \-t +option. +.sp +Normally, the filesystem type is deduced by searching for +.I filesys +in the +.I /etc/fstab +file and using the corresponding entry. +If the type can not be deduced, and there is only a single filesystem +given as an argument to the +.B \-t +option, +.B fsck +will use the specified filesystem type. If this type is not +available, then the default file system type (currently ext2) is used. +.TP +.B \-A +Walk through the +.I /etc/fstab +file and try to check all file systems in one run. This option is +typically used from the +.I /etc/rc +system initialization file, instead of multiple commands for checking +a single file system. +.sp +The root filesystem will be checked first unless the +.B \-P +option is specified (see below). After that, +filesystems will be checked in the order specified by the +.I fs_passno +(the sixth) field in the +.I /etc/fstab +file. +Filesystems with a +.I fs_passno +value of 0 are skipped and are not checked at all. Filesystems with a +.I fs_passno +value of greater than zero will be checked in order, +with filesystems with the lowest +.I fs_passno +number being checked first. +If there are multiple filesystems with the same pass number, +fsck will attempt to check them in parallel, although it will avoid running +multiple filesystem checks on the same physical disk. +.sp +Hence, a very common configuration in +.I /etc/fstab +files is to set the root filesystem to have a +.I fs_passno +value of 1 +and to set all other filesystems to have a +.I fs_passno +value of 2. This will allow +.B fsck +to automatically run filesystem checkers in parallel if it is advantageous +to do so. System administrators might choose +not to use this configuration if they need to avoid multiple filesystem +checks running in parallel for some reason --- for example, if the +machine in question is short on memory so that +excessive paging is a concern. +.TP +.B \-C\fR [ \fI "fd" \fR ] +Display completion/progress bars for those filesystem checkers (currently +only for ext2 and ext3) which support them. Fsck will manage the +filesystem checkers so that only one of them will display +a progress bar at a time. GUI front-ends may specify a file descriptor +.IR fd , +in which case the progress bar information will be sent to that file descriptor. +.TP +.B \-M +Do not check mounted filesystems and return an exit code of 0 +for mounted filesystems. +.TP +.B \-N +Don't execute, just show what would be done. +.TP +.B \-P +When the +.B \-A +flag is set, check the root filesystem in parallel with the other filesystems. +This is not the safest thing in the world to do, +since if the root filesystem is in doubt things like the +.BR e2fsck (8) +executable might be corrupted! This option is mainly provided +for those sysadmins who don't want to repartition the root +filesystem to be small and compact (which is really the right solution). +.TP +.B \-R +When checking all file systems with the +.B \-A +flag, skip the root file system (in case it's already mounted read-write). +.TP +.B \-T +Don't show the title on startup. +.TP +.B \-V +Produce verbose output, including all file system-specific commands +that are executed. +.TP +.B fs-specific-options +Options which are not understood by +.B fsck +are passed to the filesystem-specific checker. These arguments +.B must +not take arguments, as there is no +way for +.B fsck +to be able to properly guess which arguments take options and which +don't. +.IP +Options and arguments which follow the +.B \-\- +are treated as file system-specific options to be passed to the +file system-specific checker. +.IP +Please note that fsck is not +designed to pass arbitrarily complicated options to filesystem-specific +checkers. If you're doing something complicated, please just +execute the filesystem-specific checker directly. If you pass +.B fsck +some horribly complicated option and arguments, and it doesn't do +what you expect, +.B don't bother reporting it as a bug. +You're almost certainly doing something that you shouldn't be doing +with +.BR fsck. +.PP +Options to different filesystem-specific fsck's are not standardized. +If in doubt, please consult the man pages of the filesystem-specific +checker. Although not guaranteed, the following options are supported +by most file system checkers: +.TP +.B \-a +Automatically repair the file system without any questions (use +this option with caution). Note that +.BR e2fsck (8) +supports +.B \-a +for backwards compatibility only. This option is mapped to +.BR e2fsck 's +.B \-p +option which is safe to use, unlike the +.B \-a +option that some file system checkers support. +.TP +.B \-n +For some filesystem-specific checkers, the +.B \-n +option will cause the fs-specific fsck to avoid attempting to repair any +problems, but simply report such problems to stdout. This is however +not true for all filesystem-specific checkers. In particular, +.BR fsck.reiserfs (8) +will not report any corruption if given this option. +.BR fsck.minix (8) +does not support the +.B \-n +option at all. +.TP +.B \-r +Interactively repair the filesystem (ask for confirmations). Note: It +is generally a bad idea to use this option if multiple fsck's are being +run in parallel. Also note that this is +.BR e2fsck 's +default behavior; it supports this option for backwards compatibility +reasons only. +.TP +.B \-y +For some filesystem-specific checkers, the +.B \-y +option will cause the fs-specific fsck to always attempt to fix any +detected filesystem corruption automatically. Sometimes an expert may +be able to do better driving the fsck manually. Note that +.B not +all filesystem-specific checkers implement this option. In particular +.BR fsck.minix (8) +and +.BR fsck.cramfs (8) +does not support the +.B -y +option as of this writing. +.SH AUTHOR +Theodore Ts'o (tytso@mit.edu) +.SH AVAILABILITY +The blkid command is part of the util-linux-ng package and is available from +ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. +.SH FILES +.IR /etc/fstab . +.SH ENVIRONMENT VARIABLES +The +.B fsck +program's behavior is affected by the following environment variables: +.TP +.B FSCK_FORCE_ALL_PARALLEL +If this environment variable is set, +.B fsck +will attempt to run all of the specified filesystems in parallel, +regardless of whether the filesystems appear to be on the same +device. (This is useful for RAID systems or high-end storage systems +such as those sold by companies such as IBM or EMC.) +.TP +.B FSCK_MAX_INST +This environment variable will limit the maximum number of file system +checkers that can be running at one time. This allows configurations +which have a large number of disks to avoid +.B fsck +starting too many file system checkers at once, which might overload +CPU and memory resources available on the system. If this value is +zero, then an unlimited number of processes can be spawned. This is +currently the default, but future versions of +.B fsck +may attempt to automatically determine how many file system checks can +be run based on gathering accounting data from the operating system. +.TP +.B PATH +The +.B PATH +environment variable is used to find file system checkers. A set of +system directories are searched first: +.BR /sbin , +.BR /sbin/fs.d , +.BR /sbin/fs , +.BR /etc/fs , +and +.BR /etc . +Then the set of directories found in the +.B PATH +environment are searched. +.TP +.B FSTAB_FILE +This environment variable allows the system administrator +to override the standard location of the +.B /etc/fstab +file. It is also useful for developers who are testing +.BR fsck . +.SH SEE ALSO +.BR fstab (5), +.BR mkfs (8), +.BR fsck.ext2 (8) +or +.BR fsck.ext3 (8) +or +.BR e2fsck (8), +.BR cramfsck (8), +.BR fsck.minix (8), +.BR fsck.msdos (8), +.BR fsck.jfs (8), +.BR fsck.nfs (8), +.BR fsck.vfat (8), +.BR fsck.xfs (8), +.BR fsck.xiafs (8), +.BR reiserfsck (8). diff --git a/fsck/fsck.c b/fsck/fsck.c new file mode 100644 index 000000000..c3f0d6a93 --- /dev/null +++ b/fsck/fsck.c @@ -0,0 +1,1326 @@ +/* + * pfsck --- A generic, parallelizing front-end for the fsck program. + * It will automatically try to run fsck programs in parallel if the + * devices are on separate spindles. It is based on the same ideas as + * the generic front end for fsck by David Engel and Fred van Kempen, + * but it has been completely rewritten from scratch to support + * parallel execution. + * + * Written by Theodore Ts'o, <tytso@mit.edu> + * + * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994: + * o Changed -t fstype to behave like with mount when -A (all file + * systems) or -M (like mount) is specified. + * o fsck looks if it can find the fsck.type program to decide + * if it should ignore the fs type. This way more fsck programs + * can be added without changing this front-end. + * o -R flag skip root file system. + * + * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, + * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o. + * + * Copyright (C) 2009 Karel Zak <kzak@redhat.com> + * + * This file may be redistributed under the terms of the GNU Public + * License. + */ + +#define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */ + +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/signal.h> +#include <sys/stat.h> +#include <limits.h> +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <time.h> +#include <stdlib.h> +#include <errno.h> +#include <paths.h> +#include <unistd.h> +#include <errno.h> +#include <malloc.h> +#include <signal.h> + +#include <blkid.h> + +#include "nls.h" +#include "pathnames.h" +#include "ismounted.h" + +#include "fsck.h" + +static const char *ignored_types[] = { + "ignore", + "iso9660", + "nfs", + "proc", + "sw", + "swap", + "tmpfs", + "devpts", + NULL +}; + +static const char *really_wanted[] = { + "minix", + "ext2", + "ext3", + "ext4", + "ext4dev", + "jfs", + "reiserfs", + "xiafs", + "xfs", + NULL +}; + +#define BASE_MD "/dev/md" + +/* + * Global variables for options + */ +char *devices[MAX_DEVICES]; +char *args[MAX_ARGS]; +int num_devices, num_args; + +int verbose = 0; +int doall = 0; +int noexecute = 0; +int serialize = 0; +int skip_root = 0; +int ignore_mounted = 0; +int notitle = 0; +int parallel_root = 0; +int progress = 0; +int progress_fd = 0; +int force_all_parallel = 0; +int num_running = 0; +int max_running = 0; +volatile int cancel_requested = 0; +int kill_sent = 0; +char *progname; +char *fstype = NULL; +struct fs_info *filesys_info = NULL, *filesys_last = NULL; +struct fsck_instance *instance_list; +const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc"; +char *fsck_path = 0; +blkid_cache cache = NULL; + +static char *string_copy(const char *s) +{ + char *ret; + + if (!s) + return 0; + ret = malloc(strlen(s)+1); + if (ret) + strcpy(ret, s); + return ret; +} + +static int string_to_int(const char *s) +{ + long l; + char *p; + + l = strtol(s, &p, 0); + if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX) + return -1; + else + return (int) l; +} + +static int ignore(struct fs_info *); + +static char *skip_over_blank(char *cp) +{ + while (*cp && isspace(*cp)) + cp++; + return cp; +} + +static char *skip_over_word(char *cp) +{ + while (*cp && !isspace(*cp)) + cp++; + return cp; +} + +static void strip_line(char *line) +{ + char *p; + + while (*line) { + p = line + strlen(line) - 1; + if ((*p == '\n') || (*p == '\r')) + *p = 0; + else + break; + } +} + +static char *parse_word(char **buf) +{ + char *word, *next; + + word = *buf; + if (*word == 0) + return 0; + + word = skip_over_blank(word); + next = skip_over_word(word); + if (*next) + *next++ = 0; + *buf = next; + return word; +} + +static void parse_escape(char *word) +{ + char *p, *q; + int ac, i; + + if (!word) + return; + + for (p = word, q = word; *p; p++, q++) { + *q = *p; + if (*p != '\\') + continue; + if (*++p == 0) + break; + if (*p == 't') { + *q = '\t'; + continue; + } + if (*p == 'n') { + *q = '\n'; + continue; + } + if (!isdigit(*p)) { + *q = *p; + continue; + } + ac = 0; + for (i = 0; i < 3; i++, p++) { + if (!isdigit(*p)) + break; + ac = (ac * 8) + (*p - '0'); + } + *q = ac; + p--; + } + *q = 0; +} + +static void free_instance(struct fsck_instance *i) +{ + if (i->prog) + free(i->prog); + if (i->device) + free(i->device); + if (i->base_device) + free(i->base_device); + free(i); + return; +} + +static struct fs_info *create_fs_device(const char *device, const char *mntpnt, + const char *type, const char *opts, + int freq, int passno) +{ + struct fs_info *fs; + + if (!(fs = malloc(sizeof(struct fs_info)))) + return NULL; + + fs->device = string_copy(device); + fs->mountpt = string_copy(mntpnt); + fs->type = string_copy(type); + fs->opts = string_copy(opts ? opts : ""); + fs->freq = freq; + fs->passno = passno; + fs->flags = 0; + fs->next = NULL; + + if (!filesys_info) + filesys_info = fs; + else + filesys_last->next = fs; + filesys_last = fs; + + return fs; +} + + + +static int parse_fstab_line(char *line, struct fs_info **ret_fs) +{ + char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp; + struct fs_info *fs; + + *ret_fs = 0; + strip_line(line); + cp = line; + + device = parse_word(&cp); + if (!device || *device == '#') + return 0; /* Ignore blank lines and comments */ + mntpnt = parse_word(&cp); + type = parse_word(&cp); + opts = parse_word(&cp); + freq = parse_word(&cp); + passno = parse_word(&cp); + + if (!mntpnt || !type) + return -1; + + parse_escape(device); + parse_escape(mntpnt); + parse_escape(type); + parse_escape(opts); + parse_escape(freq); + parse_escape(passno); + + dev = blkid_get_devname(cache, device, NULL); + if (dev) + device = dev; + + if (strchr(type, ',')) + type = 0; + + fs = create_fs_device(device, mntpnt, type ? type : "auto", opts, + freq ? atoi(freq) : -1, + passno ? atoi(passno) : -1); + if (dev) + free(dev); + + if (!fs) + return -1; + *ret_fs = fs; + return 0; +} + +static void interpret_type(struct fs_info *fs) +{ + char *t; + + if (strcmp(fs->type, "auto") != 0) + return; + t = blkid_get_tag_value(cache, "TYPE", fs->device); + if (t) { + free(fs->type); + fs->type = t; + } +} + +/* + * Load the filesystem database from /etc/fstab + */ +static void load_fs_info(const char *filename) +{ + FILE *f; + char buf[1024]; + int lineno = 0; + int old_fstab = 1; + struct fs_info *fs; + + if ((f = fopen(filename, "r")) == NULL) { + fprintf(stderr, _("WARNING: couldn't open %s: %s\n"), + filename, strerror(errno)); + return; + } + while (!feof(f)) { + lineno++; + if (!fgets(buf, sizeof(buf), f)) + break; + buf[sizeof(buf)-1] = 0; + if (parse_fstab_line(buf, &fs) < 0) { + fprintf(stderr, _("WARNING: bad format " + "on line %d of %s\n"), lineno, filename); + continue; + } + if (!fs) + continue; + if (fs->passno < 0) + fs->passno = 0; + else + old_fstab = 0; + } + + fclose(f); + + if (old_fstab && filesys_info) { + fputs(_("\007\007\007" + "WARNING: Your /etc/fstab does not contain the fsck passno\n" + " field. I will kludge around things for you, but you\n" + " should fix your /etc/fstab file as soon as you can.\n\n"), stderr); + + for (fs = filesys_info; fs; fs = fs->next) { + fs->passno = 1; + } + } +} + +/* Lookup filesys in /etc/fstab and return the corresponding entry. */ +static struct fs_info *lookup(char *filesys) +{ + struct fs_info *fs; + + /* No filesys name given. */ + if (filesys == NULL) + return NULL; + + for (fs = filesys_info; fs; fs = fs->next) { + if (!strcmp(filesys, fs->device) || + (fs->mountpt && !strcmp(filesys, fs->mountpt))) + break; + } + + return fs; +} + +/* Find fsck program for a given fs type. */ +static char *find_fsck(char *type) +{ + char *s; + const char *tpl; + static char prog[256]; + char *p = string_copy(fsck_path); + struct stat st; + + /* Are we looking for a program or just a type? */ + tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s"); + + for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) { + sprintf(prog, tpl, s, type); + if (stat(prog, &st) == 0) break; + } + free(p); + return(s ? prog : NULL); +} + +static int progress_active(NOARGS) +{ + struct fsck_instance *inst; + + for (inst = instance_list; inst; inst = inst->next) { + if (inst->flags & FLAG_DONE) + continue; + if (inst->flags & FLAG_PROGRESS) + return 1; + } + return 0; +} + +/* + * Execute a particular fsck program, and link it into the list of + * child processes we are waiting for. + */ +static int execute(const char *type, const char *device, const char *mntpt, + int interactive) +{ + char *s, *argv[80], prog[80]; + int argc, i; + struct fsck_instance *inst, *p; + pid_t pid; + + inst = malloc(sizeof(struct fsck_instance)); + if (!inst) + return ENOMEM; + memset(inst, 0, sizeof(struct fsck_instance)); + + sprintf(prog, "fsck.%s", type); + argv[0] = string_copy(prog); + argc = 1; + + for (i=0; i <num_args; i++) + argv[argc++] = string_copy(args[i]); + + if (progress) { + if ((strcmp(type, "ext2") == 0) || + (strcmp(type, "ext3") == 0) || + (strcmp(type, "ext4") == 0) || + (strcmp(type, "ext4dev") == 0)) { + char tmp[80]; + + tmp[0] = 0; + if (!progress_active()) { + snprintf(tmp, 80, "-C%d", progress_fd); + inst->flags |= FLAG_PROGRESS; + } else if (progress_fd) + snprintf(tmp, 80, "-C%d", progress_fd * -1); + if (tmp[0]) + argv[argc++] = string_copy(tmp); + } + } + + argv[argc++] = string_copy(device); + argv[argc] = 0; + + s = find_fsck(prog); + if (s == NULL) { + fprintf(stderr, _("fsck: %s: not found\n"), prog); + free(inst); + return ENOENT; + } + + if (verbose || noexecute) { + printf("[%s (%d) -- %s] ", s, num_running, + mntpt ? mntpt : device); + for (i=0; i < argc; i++) + printf("%s ", argv[i]); + printf("\n"); + } + + /* Fork and execute the correct program. */ + if (noexecute) + pid = -1; + else if ((pid = fork()) < 0) { + perror("fork"); + free(inst); + return errno; + } else if (pid == 0) { + if (!interactive) + close(0); + (void) execv(s, argv); + perror(argv[0]); + free(inst); + exit(EXIT_ERROR); + } + + for (i=0; i < argc; i++) + free(argv[i]); + + inst->pid = pid; + inst->prog = string_copy(prog); + inst->type = string_copy(type); + inst->device = string_copy(device); + inst->base_device = base_device(device); + inst->start_time = time(0); + inst->next = NULL; + + /* + * Find the end of the list, so we add the instance on at the end. + */ + for (p = instance_list; p && p->next; p = p->next); + + if (p) + p->next = inst; + else + instance_list = inst; + + return 0; +} + +/* + * Send a signal to all outstanding fsck child processes + */ +static int kill_all(int signum) +{ + struct fsck_instance *inst; + int n = 0; + + for (inst = instance_list; inst; inst = inst->next) { + if (inst->flags & FLAG_DONE) + continue; + kill(inst->pid, signum); + n++; + } + return n; +} + +/* + * Wait for one child process to exit; when it does, unlink it from + * the list of executing child processes, and return it. + */ +static struct fsck_instance *wait_one(int flags) +{ + int status; + int sig; + struct fsck_instance *inst, *inst2, *prev; + pid_t pid; + + if (!instance_list) + return NULL; + + if (noexecute) { + inst = instance_list; + prev = 0; +#ifdef RANDOM_DEBUG + while (inst->next && (random() & 1)) { + prev = inst; + inst = inst->next; + } +#endif + inst->exit_status = 0; + goto ret_inst; + } + + /* + * gcc -Wall fails saving throw against stupidity + * (inst and prev are thought to be uninitialized variables) + */ + inst = prev = NULL; + + do { + pid = waitpid(-1, &status, flags); + if (cancel_requested && !kill_sent) { + kill_all(SIGTERM); + kill_sent++; + } + if ((pid == 0) && (flags & WNOHANG)) + return NULL; + if (pid < 0) { + if ((errno == EINTR) || (errno == EAGAIN)) + continue; + if (errno == ECHILD) { + fprintf(stderr, + _("%s: wait: No more child process?!?\n"), + progname); + return NULL; + } + perror("wait"); + continue; + } + for (prev = 0, inst = instance_list; + inst; + prev = inst, inst = inst->next) { + if (inst->pid == pid) + break; + } + } while (!inst); + + if (WIFEXITED(status)) + status = WEXITSTATUS(status); + else if (WIFSIGNALED(status)) { + sig = WTERMSIG(status); + if (sig == SIGINT) { + status = EXIT_UNCORRECTED; + } else { + printf(_("Warning... %s for device %s exited " + "with signal %d.\n"), + inst->prog, inst->device, sig); + status = EXIT_ERROR; + } + } else { + printf(_("%s %s: status is %x, should never happen.\n"), + inst->prog, inst->device, status); + status = EXIT_ERROR; + } + inst->exit_status = status; + inst->flags |= FLAG_DONE; + if (progress && (inst->flags & FLAG_PROGRESS) && + !progress_active()) { + for (inst2 = instance_list; inst2; inst2 = inst2->next) { + if (inst2->flags & FLAG_DONE) + continue; + if (strcmp(inst2->type, "ext2") && + strcmp(inst2->type, "ext3") && + strcmp(inst2->type, "ext4") && + strcmp(inst2->type, "ext4dev")) + continue; + /* + * If we've just started the fsck, wait a tiny + * bit before sending the kill, to give it + * time to set up the signal handler + */ + if (inst2->start_time < time(0)+2) { + if (fork() == 0) { + sleep(1); + kill(inst2->pid, SIGUSR1); + exit(0); + } + } else + kill(inst2->pid, SIGUSR1); + inst2->flags |= FLAG_PROGRESS; + break; + } + } +ret_inst: + if (prev) + prev->next = inst->next; + else + instance_list = inst->next; + if (verbose > 1) + printf(_("Finished with %s (exit status %d)\n"), + inst->device, inst->exit_status); + num_running--; + return inst; +} + +#define FLAG_WAIT_ALL 0 +#define FLAG_WAIT_ATLEAST_ONE 1 +/* + * Wait until all executing child processes have exited; return the + * logical OR of all of their exit code values. + */ +static int wait_many(int flags) +{ + struct fsck_instance *inst; + int global_status = 0; + int wait_flags = 0; + + while ((inst = wait_one(wait_flags))) { + global_status |= inst->exit_status; + free_instance(inst); +#ifdef RANDOM_DEBUG + if (noexecute && (flags & WNOHANG) && !(random() % 3)) + break; +#endif + if (flags & FLAG_WAIT_ATLEAST_ONE) + wait_flags = WNOHANG; + } + return global_status; +} + +/* + * Run the fsck program on a particular device + * + * If the type is specified using -t, and it isn't prefixed with "no" + * (as in "noext2") and only one filesystem type is specified, then + * use that type regardless of what is specified in /etc/fstab. + * + * If the type isn't specified by the user, then use either the type + * specified in /etc/fstab, or DEFAULT_FSTYPE. + */ +static void fsck_device(struct fs_info *fs, int interactive) +{ + const char *type; + int retval; + + interpret_type(fs); + + if (strcmp(fs->type, "auto") != 0) + type = fs->type; + else if (fstype && strncmp(fstype, "no", 2) && + strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) && + !strchr(fstype, ',')) + type = fstype; + else + type = DEFAULT_FSTYPE; + + num_running++; + retval = execute(type, fs->device, fs->mountpt, interactive); + if (retval) { + fprintf(stderr, _("%s: Error %d while executing fsck.%s " + "for %s\n"), progname, retval, type, fs->device); + num_running--; + } +} + + +/* + * Deal with the fsck -t argument. + */ +struct fs_type_compile { + char **list; + int *type; + int negate; +} fs_type_compiled; + +#define FS_TYPE_NORMAL 0 +#define FS_TYPE_OPT 1 +#define FS_TYPE_NEGOPT 2 + +static const char *fs_type_syntax_error = +N_("Either all or none of the filesystem types passed to -t must be prefixed\n" + "with 'no' or '!'.\n"); + +static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp) +{ + char *cp, *list, *s; + int num = 2; + int negate, first_negate = 1; + + if (fs_type) { + for (cp=fs_type; *cp; cp++) { + if (*cp == ',') + num++; + } + } + + cmp->list = malloc(num * sizeof(char *)); + cmp->type = malloc(num * sizeof(int)); + if (!cmp->list || !cmp->type) { + fputs(_("Couldn't allocate memory for filesystem types\n"), + stderr); + exit(EXIT_ERROR); + } + memset(cmp->list, 0, num * sizeof(char *)); + memset(cmp->type, 0, num * sizeof(int)); + cmp->negate = 0; + + if (!fs_type) + return; + + list = string_copy(fs_type); + num = 0; + s = strtok(list, ","); + while(s) { + negate = 0; + if (strncmp(s, "no", 2) == 0) { + s += 2; + negate = 1; + } else if (*s == '!') { + s++; + negate = 1; + } + if (strcmp(s, "loop") == 0) + /* loop is really short-hand for opts=loop */ + goto loop_special_case; + else if (strncmp(s, "opts=", 5) == 0) { + s += 5; + loop_special_case: + cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT; + } else { + if (first_negate) { + cmp->negate = negate; + first_negate = 0; + } + if ((negate && !cmp->negate) || + (!negate && cmp->negate)) { + fputs(_(fs_type_syntax_error), stderr); + exit(EXIT_USAGE); + } + } +#if 0 + printf("Adding %s to list (type %d).\n", s, cmp->type[num]); +#endif + cmp->list[num++] = string_copy(s); + s = strtok(NULL, ","); + } + free(list); +} + +/* + * This function returns true if a particular option appears in a + * comma-delimited options list + */ +static int opt_in_list(const char *opt, char *optlist) +{ + char *list, *s; + + if (!optlist) + return 0; + list = string_copy(optlist); + + s = strtok(list, ","); + while(s) { + if (strcmp(s, opt) == 0) { + free(list); + return 1; + } + s = strtok(NULL, ","); + } + free(list); + return 0; +} + +/* See if the filesystem matches the criteria given by the -t option */ +static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp) +{ + int n, ret = 0, checked_type = 0; + char *cp; + + if (cmp->list == 0 || cmp->list[0] == 0) + return 1; + + for (n=0; (cp = cmp->list[n]); n++) { + switch (cmp->type[n]) { + case FS_TYPE_NORMAL: + checked_type++; + if (strcmp(cp, fs->type) == 0) { + ret = 1; + } + break; + case FS_TYPE_NEGOPT: + if (opt_in_list(cp, fs->opts)) + return 0; + break; + case FS_TYPE_OPT: + if (!opt_in_list(cp, fs->opts)) + return 0; + break; + } + } + if (checked_type == 0) + return 1; + return (cmp->negate ? !ret : ret); +} + +/* Check if we should ignore this filesystem. */ +static int ignore(struct fs_info *fs) +{ + const char **ip; + int wanted = 0; + + /* + * If the pass number is 0, ignore it. + */ + if (fs->passno == 0) + return 1; + + /* + * If this is a bind mount, ignore it. + */ + if (opt_in_list("bind", fs->opts)) { + fprintf(stderr, + _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"), + fs->mountpt); + return 1; + } + + interpret_type(fs); + + /* + * If a specific fstype is specified, and it doesn't match, + * ignore it. + */ + if (!fs_match(fs, &fs_type_compiled)) return 1; + + /* Are we ignoring this type? */ + for(ip = ignored_types; *ip; ip++) + if (strcmp(fs->type, *ip) == 0) return 1; + + /* Do we really really want to check this fs? */ + for(ip = really_wanted; *ip; ip++) + if (strcmp(fs->type, *ip) == 0) { + wanted = 1; + break; + } + + /* See if the <fsck.fs> program is available. */ + if (find_fsck(fs->type) == NULL) { + if (wanted) + fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"), + fs->device, fs->type); + return 1; + } + + /* We can and want to check this file system type. */ + return 0; +} + +/* + * Returns TRUE if a partition on the same disk is already being + * checked. + */ +static int device_already_active(char *device) +{ + struct fsck_instance *inst; + char *base; + + if (force_all_parallel) + return 0; + +#ifdef BASE_MD + /* Don't check a soft raid disk with any other disk */ + if (instance_list && + (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) || + !strncmp(device, BASE_MD, sizeof(BASE_MD)-1))) + return 1; +#endif + + base = base_device(device); + /* + * If we don't know the base device, assume that the device is + * already active if there are any fsck instances running. + */ + if (!base) + return (instance_list != 0); + for (inst = instance_list; inst; inst = inst->next) { + if (!inst->base_device || !strcmp(base, inst->base_device)) { + free(base); + return 1; + } + } + free(base); + return 0; +} + +/* Check all file systems, using the /etc/fstab table. */ +static int check_all(NOARGS) +{ + struct fs_info *fs = NULL; + int status = EXIT_OK; + int not_done_yet = 1; + int passno = 1; + int pass_done; + + if (verbose) + fputs(_("Checking all file systems.\n"), stdout); + + /* + * Do an initial scan over the filesystem; mark filesystems + * which should be ignored as done, and resolve any "auto" + * filesystem types (done as a side-effect of calling ignore()). + */ + for (fs = filesys_info; fs; fs = fs->next) { + if (ignore(fs)) + fs->flags |= FLAG_DONE; + } + + /* + * Find and check the root filesystem. + */ + if (!parallel_root) { + for (fs = filesys_info; fs; fs = fs->next) { + if (!strcmp(fs->mountpt, "/")) + break; + } + if (fs) { + if (!skip_root && !ignore(fs) && + !(ignore_mounted && is_mounted(fs->device))) { + fsck_device(fs, 1); + status |= wait_many(FLAG_WAIT_ALL); + if (status > EXIT_NONDESTRUCT) + return status; + } + fs->flags |= FLAG_DONE; + } + } + /* + * This is for the bone-headed user who enters the root + * filesystem twice. Skip root will skep all root entries. + */ + if (skip_root) + for (fs = filesys_info; fs; fs = fs->next) + if (!strcmp(fs->mountpt, "/")) + fs->flags |= FLAG_DONE; + + while (not_done_yet) { + not_done_yet = 0; + pass_done = 1; + + for (fs = filesys_info; fs; fs = fs->next) { + if (cancel_requested) + break; + if (fs->flags & FLAG_DONE) + continue; + /* + * If the filesystem's pass number is higher + * than the current pass number, then we don't + * do it yet. + */ + if (fs->passno > passno) { + not_done_yet++; + continue; + } + if (ignore_mounted && is_mounted(fs->device)) { + fs->flags |= FLAG_DONE; + continue; + } + /* + * If a filesystem on a particular device has + * already been spawned, then we need to defer + * this to another pass. + */ + if (device_already_active(fs->device)) { + pass_done = 0; + continue; + } + /* + * Spawn off the fsck process + */ + fsck_device(fs, serialize); + fs->flags |= FLAG_DONE; + + /* + * Only do one filesystem at a time, or if we + * have a limit on the number of fsck's extant + * at one time, apply that limit. + */ + if (serialize || + (max_running && (num_running >= max_running))) { + pass_done = 0; + break; + } + } + if (cancel_requested) + break; + if (verbose > 1) + printf(_("--waiting-- (pass %d)\n"), passno); + status |= wait_many(pass_done ? FLAG_WAIT_ALL : + FLAG_WAIT_ATLEAST_ONE); + if (pass_done) { + if (verbose > 1) + printf("----------------------------------\n"); + passno++; + } else + not_done_yet++; + } + if (cancel_requested && !kill_sent) { + kill_all(SIGTERM); + kill_sent++; + } + status |= wait_many(FLAG_WAIT_ATLEAST_ONE); + return status; +} + +static void usage(NOARGS) +{ + fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr); + exit(EXIT_USAGE); +} + +static void signal_cancel(int sig FSCK_ATTR((unused))) +{ + cancel_requested++; +} + +static void PRS(int argc, char *argv[]) +{ + int i, j; + char *arg, *dev, *tmp = 0; + char options[128]; + int opt = 0; + int opts_for_fsck = 0; + struct sigaction sa; + + /* + * Set up signal action + */ + memset(&sa, 0, sizeof(struct sigaction)); + sa.sa_handler = signal_cancel; + sigaction(SIGINT, &sa, 0); + sigaction(SIGTERM, &sa, 0); + + num_devices = 0; + num_args = 0; + instance_list = 0; + + progname = argv[0]; + + for (i=1; i < argc; i++) { + arg = argv[i]; + if (!arg) + continue; + if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) { + if (num_devices >= MAX_DEVICES) { + fprintf(stderr, _("%s: too many devices\n"), + progname); + exit(EXIT_ERROR); + } + dev = blkid_get_devname(cache, arg, NULL); + if (!dev && strchr(arg, '=')) { + /* + * Check to see if we failed because + * /proc/partitions isn't found. + */ + if (access("/proc/partitions", R_OK) < 0) { + fprintf(stderr, "Couldn't open /proc/partitions: %s\n", + strerror(errno)); + fprintf(stderr, "Is /proc mounted?\n"); + exit(EXIT_ERROR); + } + /* + * Check to see if this is because + * we're not running as root + */ + if (geteuid()) + fprintf(stderr, + "Must be root to scan for matching filesystems: %s\n", arg); + else + fprintf(stderr, + "Couldn't find matching filesystem: %s\n", arg); + exit(EXIT_ERROR); + } + devices[num_devices++] = dev ? dev : string_copy(arg); + continue; + } + if (arg[0] != '-' || opts_for_fsck) { + if (num_args >= MAX_ARGS) { + fprintf(stderr, _("%s: too many arguments\n"), + progname); + exit(EXIT_ERROR); + } + args[num_args++] = string_copy(arg); + continue; + } + for (j=1; arg[j]; j++) { + if (opts_for_fsck) { + options[++opt] = arg[j]; + continue; + } + switch (arg[j]) { + case 'A': + doall++; + break; + case 'C': + progress++; + if (arg[j+1]) { + progress_fd = string_to_int(arg+j+1); + if (progress_fd < 0) + progress_fd = 0; + else + goto next_arg; + } else if ((i+1) < argc && + !strncmp(argv[i+1], "-", 1) == 0) { + progress_fd = string_to_int(argv[i]); + if (progress_fd < 0) + progress_fd = 0; + else { + goto next_arg; + i++; + } + } + break; + case 'V': + verbose++; + break; + case 'N': + noexecute++; + break; + case 'R': + skip_root++; + break; + case 'T': + notitle++; + break; + case 'M': + ignore_mounted++; + break; + case 'P': + parallel_root++; + break; + case 's': + serialize++; + break; + case 't': + tmp = 0; + if (fstype) + usage(); + if (arg[j+1]) + tmp = arg+j+1; + else if ((i+1) < argc) + tmp = argv[++i]; + else + usage(); + fstype = string_copy(tmp); + compile_fs_type(fstype, &fs_type_compiled); + goto next_arg; + case '-': + opts_for_fsck++; + break; + case '?': + usage(); + break; + default: + options[++opt] = arg[j]; + break; + } + } + next_arg: + if (opt) { + options[0] = '-'; + options[++opt] = '\0'; + if (num_args >= MAX_ARGS) { + fprintf(stderr, + _("%s: too many arguments\n"), + progname); + exit(EXIT_ERROR); + } + args[num_args++] = string_copy(options); + opt = 0; + } + } + if (getenv("FSCK_FORCE_ALL_PARALLEL")) + force_all_parallel++; + if ((tmp = getenv("FSCK_MAX_INST"))) + max_running = atoi(tmp); +} + +int main(int argc, char *argv[]) +{ + int i, status = 0; + int interactive = 0; + char *oldpath = getenv("PATH"); + const char *fstab; + struct fs_info *fs; + + setvbuf(stdout, NULL, _IONBF, BUFSIZ); + setvbuf(stderr, NULL, _IONBF, BUFSIZ); + + setlocale(LC_MESSAGES, ""); + setlocale(LC_CTYPE, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + + blkid_get_cache(&cache, NULL); + PRS(argc, argv); + + if (!notitle) + printf("fsck from %s\n", PACKAGE_STRING); + + fstab = getenv("FSTAB_FILE"); + if (!fstab) + fstab = _PATH_MNTTAB; + load_fs_info(fstab); + + /* Update our search path to include uncommon directories. */ + if (oldpath) { + fsck_path = malloc (strlen (fsck_prefix_path) + 1 + + strlen (oldpath) + 1); + if (!fsck_path) { + fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname); + exit(EXIT_ERROR); + } + strcpy (fsck_path, fsck_prefix_path); + strcat (fsck_path, ":"); + strcat (fsck_path, oldpath); + } else { + fsck_path = string_copy(fsck_prefix_path); + } + + if ((num_devices == 1) || (serialize)) + interactive = 1; + + /* If -A was specified ("check all"), do that! */ + if (doall) + return check_all(); + + if (num_devices == 0) { + serialize++; + interactive++; + return check_all(); + } + for (i = 0 ; i < num_devices; i++) { + if (cancel_requested) { + if (!kill_sent) { + kill_all(SIGTERM); + kill_sent++; + } + break; + } + fs = lookup(devices[i]); + if (!fs) { + fs = create_fs_device(devices[i], 0, "auto", + 0, -1, -1); + if (!fs) + continue; + } + if (ignore_mounted && is_mounted(fs->device)) + continue; + fsck_device(fs, interactive); + if (serialize || + (max_running && (num_running >= max_running))) { + struct fsck_instance *inst; + + inst = wait_one(0); + if (inst) { + status |= inst->exit_status; + free_instance(inst); + } + if (verbose > 1) + printf("----------------------------------\n"); + } + } + status |= wait_many(FLAG_WAIT_ALL); + free(fsck_path); + blkid_put_cache(cache); + return status; +} diff --git a/fsck/fsck.h b/fsck/fsck.h new file mode 100644 index 000000000..8a0f70e32 --- /dev/null +++ b/fsck/fsck.h @@ -0,0 +1,73 @@ +/* + * fsck.h + */ + +#include <time.h> + +#ifdef __STDC__ +#define NOARGS void +#else +#define NOARGS +#define const +#endif + +#ifdef __GNUC__ +#define FSCK_ATTR(x) __attribute__(x) +#else +#define FSCK_ATTR(x) +#endif + + +#ifndef DEFAULT_FSTYPE +#define DEFAULT_FSTYPE "ext2" +#endif + +#define MAX_DEVICES 32 +#define MAX_ARGS 32 + +#define EXIT_OK 0 +#define EXIT_NONDESTRUCT 1 +#define EXIT_DESTRUCT 2 +#define EXIT_UNCORRECTED 4 +#define EXIT_ERROR 8 +#define EXIT_USAGE 16 +#define EXIT_LIBRARY 128 + +/* + * Internal structure for mount tabel entries. + */ + +struct fs_info { + char *device; + char *mountpt; + char *type; + char *opts; + int freq; + int passno; + int flags; + struct fs_info *next; +}; + +#define FLAG_DONE 1 +#define FLAG_PROGRESS 2 + +/* + * Structure to allow exit codes to be stored + */ +struct fsck_instance { + int pid; + int flags; + int exit_status; + time_t start_time; + char * prog; + char * type; + char * device; + char * base_device; + struct fsck_instance *next; +}; + +extern char *base_device(const char *device); +extern const char *identify_fs(const char *fs_name, const char *fs_types); + +/* ismounted.h */ +extern int is_mounted(const char *file); diff --git a/include/ismounted.h b/include/ismounted.h new file mode 100644 index 000000000..2b7cca022 --- /dev/null +++ b/include/ismounted.h @@ -0,0 +1,6 @@ +#ifndef IS_MOUNTED_H +#define IS_MOUNTED_H + +extern int is_mounted(const char *file); + +#endif /* IS_MOUNTED_H */ diff --git a/lib/ismounted.c b/lib/ismounted.c new file mode 100644 index 000000000..85f4ab30c --- /dev/null +++ b/lib/ismounted.c @@ -0,0 +1,199 @@ +/* + * ismounted.c --- Check to see if the filesystem was mounted + * + * Copyright (C) 1995,1996,1997,1998,1999,2000,2008 Theodore Ts'o. + * + * This file may be redistributed under the terms of the GNU Public + * License. + */ +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <fcntl.h> +#include <linux/fd.h> +#include <mntent.h> +#include <string.h> +#include <sys/stat.h> +#include <ctype.h> + +#include "ismounted.h" + +/* + * ext2fs_check_if_mounted flags + */ +#define MF_MOUNTED 1 + +static char *skip_over_blank(char *cp) +{ + while (*cp && isspace(*cp)) + cp++; + return cp; +} + +static char *skip_over_word(char *cp) +{ + while (*cp && !isspace(*cp)) + cp++; + return cp; +} + +static char *parse_word(char **buf) +{ + char *word, *next; + + word = *buf; + if (*word == 0) + return 0; + + word = skip_over_blank(word); + next = skip_over_word(word); + if (*next) + *next++ = 0; + *buf = next; + return word; +} + +/* + * Helper function which checks a file in /etc/mtab format to see if a + * filesystem is mounted. Returns an error if the file doesn't exist + * or can't be opened. + */ +static int check_mntent_file(const char *mtab_file, const char *file, + int *mount_flags) +{ + struct stat st_buf; + int retval = 0; + dev_t file_dev=0, file_rdev=0; + ino_t file_ino=0; + FILE *f; + char buf[1024], *device = 0, *mnt_dir = 0, *cp; + + *mount_flags = 0; + if ((f = fopen(mtab_file, "r")) == NULL) + return errno; + + if ((f = setmntent (mtab_file, "r")) == NULL) + return errno; + if (stat(file, &st_buf) == 0) { + if (S_ISBLK(st_buf.st_mode)) { +#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ + file_rdev = st_buf.st_rdev; +#endif /* __GNU__ */ + } else { + file_dev = st_buf.st_dev; + file_ino = st_buf.st_ino; + } + } + while (1) { + if (!fgets(buf, sizeof(buf), f)) { + device = mnt_dir = 0; + break; + } + buf[sizeof(buf)-1] = 0; + + cp = buf; + device = parse_word(&cp); + if (!device || *device == '#') + return 0; /* Ignore blank lines and comments */ + mnt_dir = parse_word(&cp); + + if (device[0] != '/') + continue; + + if (strcmp(file, device) == 0) + break; + if (stat(device, &st_buf) == 0) { + if (S_ISBLK(st_buf.st_mode)) { +#ifndef __GNU__ + if (file_rdev && (file_rdev == st_buf.st_rdev)) + break; +#endif /* __GNU__ */ + } else { + if (file_dev && ((file_dev == st_buf.st_dev) && + (file_ino == st_buf.st_ino))) + break; + } + } + } + + if (mnt_dir == 0) { +#ifndef __GNU__ /* The GNU hurd is broken with respect to stat devices */ + /* + * Do an extra check to see if this is the root device. We + * can't trust /etc/mtab, and /proc/mounts will only list + * /dev/root for the root filesystem. Argh. Instead we + * check if the given device has the same major/minor number + * as the device that the root directory is on. + */ + if (file_rdev && (stat("/", &st_buf) == 0) && + (st_buf.st_dev == file_rdev)) + *mount_flags = MF_MOUNTED; +#endif /* __GNU__ */ + goto errout; + } +#ifndef __GNU__ /* The GNU hurd is deficient; what else is new? */ + /* Validate the entry in case /etc/mtab is out of date */ + /* + * We need to be paranoid, because some broken distributions + * (read: Slackware) don't initialize /etc/mtab before checking + * all of the non-root filesystems on the disk. + */ + if (stat(mnt_dir, &st_buf) < 0) { + retval = errno; + if (retval == ENOENT) { +#ifdef DEBUG + printf("Bogus entry in %s! (%s does not exist)\n", + mtab_file, mnt_dir); +#endif /* DEBUG */ + retval = 0; + } + goto errout; + } + if (file_rdev && (st_buf.st_dev != file_rdev)) { +#ifdef DEBUG + printf("Bogus entry in %s! (%s not mounted on %s)\n", + mtab_file, file, mnt_dir); +#endif /* DEBUG */ + goto errout; + } +#endif /* __GNU__ */ + *mount_flags = MF_MOUNTED; + + retval = 0; +errout: + endmntent (f); + return retval; +} + +int is_mounted(const char *file) +{ + int retval; + int mount_flags = 0; + +#ifdef __linux__ + retval = check_mntent_file("/proc/mounts", file, &mount_flags); + if (retval) + return 0; + if (mount_flags) + return 1; +#endif /* __linux__ */ + retval = check_mntent_file("/etc/mtab", file, &mount_flags); + if (retval) + return 0; + return mount_flags; +} + +#ifdef DEBUG +int main(int argc, char **argv) +{ + if (argc < 2) { + fprintf(stderr, "Usage: %s device\n", argv[0]); + exit(1); + } + + if (is_mounted(argv[1])) + printf("\t%s is mounted.\n", argv[1]); + exit(0); +} +#endif /* DEBUG */ |