From dec0bdbb64a662c2276fcca1afb3e069143990ac Mon Sep 17 00:00:00 2001 From: Francois Pons Date: Tue, 11 Apr 2000 15:15:23 +0000 Subject: *** empty log message *** --- perl-install/resize_fat/any.pm | 2 +- perl-install/resize_fat/boot_sector.pm | 2 +- perl-install/resize_fat/c_rewritten.xs | 100 +++++++++++++++++++++++++++------ perl-install/resize_fat/main.pm | 2 +- 4 files changed, 87 insertions(+), 19 deletions(-) (limited to 'perl-install/resize_fat') diff --git a/perl-install/resize_fat/any.pm b/perl-install/resize_fat/any.pm index 63f154008..407159437 100644 --- a/perl-install/resize_fat/any.pm +++ b/perl-install/resize_fat/any.pm @@ -27,7 +27,7 @@ sub min_cluster_count($) { } sub max_cluster_count($) { my ($fs) = @_; - 2 ** $fs->{fs_type_size} - 11; + (1 << $ {{ FAT16 => 16, FAT32 => 28 }}{$fs->{fs_type}}) - 11; } diff --git a/perl-install/resize_fat/boot_sector.pm b/perl-install/resize_fat/boot_sector.pm index dbfc33830..294f93a97 100644 --- a/perl-install/resize_fat/boot_sector.pm +++ b/perl-install/resize_fat/boot_sector.pm @@ -75,7 +75,7 @@ sub read($) { $fs->{nb_root_dir_entries} = 0; $fs->{info_offset} = $fs->{info_offset_in_sectors} * $fs->{sector_size}; - $resize_fat::bad_cluster_value = 0xffffff7; + $resize_fat::bad_cluster_value = 0x0ffffff7; } $fs->{fat_offset} = $fs->{nb_reserved} * $fs->{sector_size}; diff --git a/perl-install/resize_fat/c_rewritten.xs b/perl-install/resize_fat/c_rewritten.xs index eb3e314dd..33171c614 100644 --- a/perl-install/resize_fat/c_rewritten.xs +++ b/perl-install/resize_fat/c_rewritten.xs @@ -9,15 +9,37 @@ unsigned int *fat_remap = NULL; int fat_remap_size; int type_size, nb_clusters, bad_cluster_value; +void free_all() { +#define FREE(p) if (p) free(p), p = NULL; + FREE(fat); + FREE(fat_flag_map); + FREE(fat_remap); +#undef FREE +} + unsigned int next(unsigned int cluster) { short *p = fat + type_size * cluster; - if (cluster > nb_clusters + 2) croak("fat::next: cluster %d outside filesystem", cluster); + if (!fat) { + free_all(); + croak("fat::next: trying to use null pointer"); + } + if (cluster > nb_clusters + 2) { + free_all(); + croak("fat::next: cluster %d outside filesystem", cluster); + } return type_size == 1 ? *p : *((unsigned int *) p); } void set_next(unsigned int cluster, unsigned int val) { short *p = fat + type_size * cluster; - if (cluster > nb_clusters + 2) croak("fat::set_next: cluster %d outside filesystem", cluster); + if (!fat) { + free_all(); + croak("fat::set_next: trying to use null pointer"); + } + if (cluster > nb_clusters + 2) { + free_all(); + croak("fat::set_next: cluster %d outside filesystem", cluster); + } type_size == 1 ? *p : *((unsigned int *) p) = val; } @@ -32,13 +54,17 @@ read_fat(fd, offset, size, magic) PPCODE: { fat = (short *) malloc(size); + if (!fat) { + free_all(); + croak("read_fat: not enough memory"); + } if (lseek(fd, offset, SEEK_SET) != offset || read(fd, fat, size) != size) { - free(fat); fat = NULL; + free_all(); croak("read_fat: reading FAT failed"); } if (magic != *(unsigned char *) fat) { - free(fat); fat = NULL; + free_all(); croak("read_fat: FAT has invalid signature"); } } @@ -49,17 +75,16 @@ write_fat(fd, size) int size PPCODE: { - if (write(fd, fat, size) != size) croak("write_fat: write failed"); + if (write(fd, fat, size) != size) { + free_all(); + croak("write_fat: write failed"); + } } void free_all() PPCODE: -#define FREE(p) if (p) free(p), p = NULL; - FREE(fat); - FREE(fat_flag_map); - FREE(fat_remap); -#undef FREE + free_all(); void scan_fat(nb_clusters_, type_size_) @@ -74,7 +99,10 @@ scan_fat(nb_clusters_, type_size_) type_size = type_size_; nb_clusters = nb_clusters_; bad_cluster_value = type_size == 32 ? 0xffffff7 : 0xfff7; - if (type_size % 16) croak("scan_fat: unable to handle FAT%d", type_size); + if (type_size % 16) { + free_all(); + croak("scan_fat: unable to handle FAT%d", type_size); + } type_size /= 16; for (p = fat + 2 * type_size; p < fat + type_size * (nb_clusters + 2); p += type_size) { @@ -112,6 +140,10 @@ allocate_fat_flag(size) int size CODE: fat_flag_map = calloc(size, 1); + if (!fat_flag_map) { + free_all(); + croak("allocate_fat_flag: not enough memory"); + } int checkFat(cluster, type, name) @@ -121,10 +153,20 @@ checkFat(cluster, type, name) CODE: int nb = 0; + if (!fat_flag_map) { + free_all(); + croak("Bad FAT: trying to use null pointer"); + } for (; cluster < bad_cluster_value; cluster = next(cluster)) { - if (cluster == 0) croak("Bad FAT: unterminated chain for %s\n", name); - - if (fat_flag_map[cluster]) croak("Bad FAT: cluster %d is cross-linked for %s\n", cluster, name); + if (cluster == 0) { + free_all(); + croak("Bad FAT: unterminated chain for %s\n", name); + } + + if (fat_flag_map[cluster]) { + free_all(); + croak("Bad FAT: cluster %d is cross-linked for %s\n", cluster, name); + } fat_flag_map[cluster] = type; nb++; } @@ -136,6 +178,10 @@ unsigned int flag(cluster) unsigned int cluster CODE: + if (!fat_flag_map) { + free_all(); + croak("Bad FAT: trying to use null pointer"); + } RETVAL = fat_flag_map[cluster]; OUTPUT: RETVAL @@ -145,6 +191,10 @@ set_flag(cluster, flag) unsigned int cluster int flag CODE: + if (!fat_flag_map) { + free_all(); + croak("Bad FAT: trying to use null pointer"); + } fat_flag_map[cluster] = flag; void @@ -153,16 +203,30 @@ allocate_fat_remap(size) CODE: fat_remap_size = size; fat_remap = (unsigned int *) calloc(size, sizeof(unsigned int *)); + if (!fat_remap) { + free_all(); + croak("allocate_fat_remap: not enough memory"); + } unsigned int fat_remap(cluster) unsigned int cluster CODE: + if (!fat_remap) { + free_all(); + croak("fat_remap: trying to use null pointer"); + } if (cluster >= bad_cluster_value) { RETVAL = cluster; /* special cases */ } else { - if (fat_remap == NULL) croak("fat_remap: NULL in fat_remap"); - if (cluster >= fat_remap_size) croak("fat_remap: cluster %d >= %d in fat_remap", cluster, fat_remap_size); + if (fat_remap == NULL) { + free_all(); + croak("fat_remap: NULL in fat_remap"); + } + if (cluster >= fat_remap_size) { + free_all(); + croak("fat_remap: cluster %d >= %d in fat_remap", cluster, fat_remap_size); + } RETVAL = fat_remap[cluster]; } OUTPUT: @@ -173,4 +237,8 @@ set_fat_remap(cluster, val) unsigned int cluster unsigned int val CODE: + if (!fat_remap) { + free_all(); + croak("set_fat_remap: trying to use null pointer"); + } fat_remap[cluster] = val; diff --git a/perl-install/resize_fat/main.pm b/perl-install/resize_fat/main.pm index c2e589e74..0c94586ec 100644 --- a/perl-install/resize_fat/main.pm +++ b/perl-install/resize_fat/main.pm @@ -130,7 +130,7 @@ sub resize { $size >= $min or die "Minimum filesystem size is $min sectors"; $size <= $max or die "Maximum filesystem size is $max sectors"; - log::l("resize_fat: Partition size will be ", $size >> 11, "Mb (well exactly ${size} sectors)"); + log::l("resize_fat: Partition size will be ". ($size * $SECTORSIZE >> 20) ."Mb (well exactly ${size} sectors)"); my $new_data_size = $size * $SECTORSIZE - $fs->{cluster_offset}; my $new_nb_clusters = divide($new_data_size, $fs->{cluster_size}); -- cgit v1.2.1