int read_super(int fd, squashfs_super_block *sBlk, int *be, char *source) { read_bytes(fd, SQUASHFS_START, sizeof(squashfs_super_block), (char *) sBlk); /* Check it is a SQUASHFS superblock */ swap = 0; if(sBlk->s_magic != SQUASHFS_MAGIC) { if(sBlk->s_magic == SQUASHFS_MAGIC_SWAP) { squashfs_super_block sblk; ERROR("Reading a different endian SQUASHFS filesystem on %s - ignoring -le/-be options\n", source); SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk); memcpy(sBlk, &sblk, sizeof(squashfs_super_block)); swap = 1; } else { ERROR("Can't find a SQUASHFS superblock on %s\n", source); goto failed_mount; } } /* Check the MAJOR & MINOR versions */ if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) { if(sBlk->s_major == 1) ERROR("Filesystem on %s is a SQUASHFS 1.x filesystem. Appending\nto SQUASHFS 1.x filesystems is not supported. Please convert it to a SQUASHFS 2.1 filesystem...n", source); else ERROR("Major/Minor mismatch, filesystem on %s is (%d:%d), I support (%d: <= %d)\n", source, sBlk->s_major, sBlk->s_minor, SQUASHFS_MAJOR, SQUASHFS_MINOR); goto failed_mount; } #if __BYTE_ORDER == __BIG_ENDIAN *be = !swap; #else *be = swap; #endif printf("Found a valid SQUASHFS superblock on %s.\n", source); printf("\tInodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : ""); printf("\tData is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : ""); printf("\tFragments are %scompressed\n", SQUASHFS_UNCOMPRESSED_FRAGMENTS(sBlk->flags) ? "un" : ""); printf("\tCheck data is %s present in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not"); printf("\tFragments are %s present in the filesystem\n", SQUASHFS_NO_FRAGMENTS(sBlk->flags) ? "not" : ""); printf("\tAlways_use_fragments option is %s specified\n", SQUASHFS_ALWAYS_FRAGMENTS(sBlk->flags) ? "" : "not"); printf("\tDuplicates are %s removed\n", SQUASHFS_DUPLICATES(sBlk->flags) ? "" : "not"); printf("\tFilesystem size %d bytes\n", sBlk->bytes_used); printf("\tBlock size %d\n", sBlk->block_size); printf("\tNumber of fragments %d\n", sBlk->fragments); printf("\tNumber of inodes %d\n", sBlk->inodes); printf("\tNumber of uids %d\n", sBlk->no_uids); printf("\tNumber of gids %d\n", sBlk->no_guids); TRACE("sBlk->inode_table_start %x\n", sBlk->inode_table_start); TRACE("sBlk->directory_table_start %x\n", sBlk->directory_table_start); TRACE("sBlk->uid_start %x\n", sBlk->uid_start); TRACE("sBlk->fragment_table_start %x\n", sBlk->fragment_table_start); printf("\n"); return TRUE; failed_mount: return FALSE; }
int read_super(int fd, squashfs_super_block *sBlk, int *be, char *source) { squashfs_super_block sblk; read_bytes(fd, SQUASHFS_START, sizeof(squashfs_super_block), (char *) sBlk); /* Check it is a SQUASHFS superblock */ swap = 0; switch (sBlk->s_magic) { case SQUASHFS_MAGIC_LZMA: if (!lzma) goto bad; break; case SQUASHFS_MAGIC: break; case SQUASHFS_MAGIC_SWAP: case SQUASHFS_MAGIC_LZMA_SWAP: ERROR("Reading a different endian SQUASHFS filesystem on %s - ignoring -le/-be options\n", source); SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk); memcpy(sBlk, &sblk, sizeof(squashfs_super_block)); swap = 1; break; bad: default: ERROR("Can't find a SQUASHFS superblock on %s\n", source); goto failed_mount; } /* Check the MAJOR & MINOR versions */ if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) { if(sBlk->s_major < 3) ERROR("Filesystem on %s is a SQUASHFS %d.%d filesystem. Appending\nto SQUASHFS %d.%d filesystems is not supported. Please convert it to a SQUASHFS 3.0 filesystem\n", source, sBlk->s_major, sBlk->s_minor, sBlk->s_major, sBlk->s_minor); else ERROR("Major/Minor mismatch, filesystem on %s is %d.%d, I support 3.0\n", source, sBlk->s_major, sBlk->s_minor); goto failed_mount; } #if __BYTE_ORDER == __BIG_ENDIAN *be = !swap; #else *be = swap; #endif printf("Found a valid %s%s SQUASHFS superblock on %s.\n", SQUASHFS_EXPORTABLE(sBlk->flags) ? "exportable " : "", *be ? "big endian" : "little endian", source); printf("\tInodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : ""); printf("\tData is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : ""); printf("\tFragments are %scompressed\n", SQUASHFS_UNCOMPRESSED_FRAGMENTS(sBlk->flags) ? "un" : ""); printf("\tCheck data is %spresent in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not "); printf("\tFragments are %spresent in the filesystem\n", SQUASHFS_NO_FRAGMENTS(sBlk->flags) ? "not " : ""); printf("\tAlways_use_fragments option is %sspecified\n", SQUASHFS_ALWAYS_FRAGMENTS(sBlk->flags) ? "" : "not "); printf("\tDuplicates are %sremoved\n", SQUASHFS_DUPLICATES(sBlk->flags) ? "" : "not "); printf("\tFilesystem size %.2f Kbytes (%.2f Mbytes)\n", sBlk->bytes_used / 1024.0, sBlk->bytes_used / (1024.0 * 1024.0)); printf("\tBlock size %d\n", sBlk->block_size); printf("\tNumber of fragments %d\n", sBlk->fragments); printf("\tNumber of inodes %d\n", sBlk->inodes); printf("\tNumber of uids %d\n", sBlk->no_uids); printf("\tNumber of gids %d\n", sBlk->no_guids); TRACE("sBlk->inode_table_start %llx\n", sBlk->inode_table_start); TRACE("sBlk->directory_table_start %llx\n", sBlk->directory_table_start); TRACE("sBlk->uid_start %llx\n", sBlk->uid_start); TRACE("sBlk->fragment_table_start %llx\n", sBlk->fragment_table_start); TRACE("sBlk->lookup_table_start %xllx\n", sBlk->lookup_table_start); printf("\n"); return TRUE; failed_mount: return FALSE; }