From 498267851d48ee60376dc96411fb8693a5e95a3c Mon Sep 17 00:00:00 2001 From: Guido Guenther Date: Wed, 21 Nov 2007 16:55:40 +0100 Subject: remove unneeded e2fslib --- e2fslib/imager.c | 380 ------------------------------------------------------- 1 file changed, 380 deletions(-) delete mode 100644 e2fslib/imager.c (limited to 'e2fslib/imager.c') diff --git a/e2fslib/imager.c b/e2fslib/imager.c deleted file mode 100644 index 242e36a..0000000 --- a/e2fslib/imager.c +++ /dev/null @@ -1,380 +0,0 @@ -/* - * image.c --- writes out the critical parts of the filesystem as a - * flat file. - * - * Copyright (C) 2000 Theodore Ts'o. - * - * Note: this uses the POSIX IO interfaces, unlike most of the other - * functions in this library. So sue me. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include -#include -#if HAVE_UNISTD_H -#include -#endif -#if HAVE_ERRNO_H -#include -#endif -#include -#include -#if HAVE_SYS_STAT_H -#include -#endif -#if HAVE_SYS_TYPES_H -#include -#endif - -#include "ext2_fs.h" -#include "ext2fs.h" - -/* - * This function returns 1 if the specified block is all zeros - */ -static int check_zero_block(char *buf, int blocksize) -{ - char *cp = buf; - int left = blocksize; - - while (left > 0) { - if (*cp++) - return 0; - left--; - } - return 1; -} - -/* - * Write the inode table out as a single block. - */ -#define BUF_BLOCKS 32 - -errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags) -{ - unsigned int group, left, c, d; - char *buf, *cp; - blk_t blk; - ssize_t actual; - errcode_t retval; - - buf = malloc(fs->blocksize * BUF_BLOCKS); - if (!buf) - return ENOMEM; - - for (group = 0; group < fs->group_desc_count; group++) { - blk = fs->group_desc[(unsigned)group].bg_inode_table; - if (!blk) - return EXT2_ET_MISSING_INODE_TABLE; - left = fs->inode_blocks_per_group; - while (left) { - c = BUF_BLOCKS; - if (c > left) - c = left; - retval = io_channel_read_blk(fs->io, blk, c, buf); - if (retval) - goto errout; - cp = buf; - while (c) { - if (!(flags & IMAGER_FLAG_SPARSEWRITE)) { - d = c; - goto skip_sparse; - } - /* Skip zero blocks */ - if (check_zero_block(cp, fs->blocksize)) { - c--; - blk++; - left--; - cp += fs->blocksize; - lseek(fd, fs->blocksize, SEEK_CUR); - continue; - } - /* Find non-zero blocks */ - for (d=1; d < c; d++) { - if (check_zero_block(cp + d*fs->blocksize, fs->blocksize)) - break; - } - skip_sparse: - actual = write(fd, cp, fs->blocksize * d); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != fs->blocksize * d) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - blk += d; - left -= d; - cp += fs->blocksize * d; - c -= d; - } - } - } - retval = 0; - -errout: - free(buf); - return retval; -} - -/* - * Read in the inode table and stuff it into place - */ -errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags) -{ - unsigned int group, c, left; - char *buf; - blk_t blk; - ssize_t actual; - errcode_t retval; - - buf = malloc(fs->blocksize * BUF_BLOCKS); - if (!buf) - return ENOMEM; - - for (group = 0; group < fs->group_desc_count; group++) { - blk = fs->group_desc[(unsigned)group].bg_inode_table; - if (!blk) { - retval = EXT2_ET_MISSING_INODE_TABLE; - goto errout; - } - left = fs->inode_blocks_per_group; - while (left) { - c = BUF_BLOCKS; - if (c > left) - c = left; - actual = read(fd, buf, fs->blocksize * c); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != fs->blocksize * c) { - retval = EXT2_ET_SHORT_READ; - goto errout; - } - retval = io_channel_write_blk(fs->io, blk, c, buf); - if (retval) - goto errout; - - blk += c; - left -= c; - } - } - retval = ext2fs_flush_icache(fs); - -errout: - free(buf); - return retval; -} - -/* - * Write out superblock and group descriptors - */ -errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags) -{ - char *buf, *cp; - ssize_t actual; - errcode_t retval; - - buf = malloc(fs->blocksize); - if (!buf) - return ENOMEM; - - /* - * Write out the superblock - */ - memset(buf, 0, fs->blocksize); - memcpy(buf, fs->super, SUPERBLOCK_SIZE); - actual = write(fd, buf, fs->blocksize); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != fs->blocksize) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - - /* - * Now write out the block group descriptors - */ - cp = (char *) fs->group_desc; - actual = write(fd, cp, fs->blocksize * fs->desc_blocks); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != fs->blocksize * fs->desc_blocks) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - - retval = 0; - -errout: - free(buf); - return retval; -} - -/* - * Read the superblock and group descriptors and overwrite them. - */ -errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags) -{ - char *buf; - ssize_t actual, size; - errcode_t retval; - - size = fs->blocksize * (fs->group_desc_count + 1); - buf = malloc(size); - if (!buf) - return ENOMEM; - - /* - * Read it all in. - */ - actual = read(fd, buf, size); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != size) { - retval = EXT2_ET_SHORT_READ; - goto errout; - } - - /* - * Now copy in the superblock and group descriptors - */ - memcpy(fs->super, buf, SUPERBLOCK_SIZE); - - memcpy(fs->group_desc, buf + fs->blocksize, - fs->blocksize * fs->group_desc_count); - - retval = 0; - -errout: - free(buf); - return retval; -} - -/* - * Write the block/inode bitmaps. - */ -errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags) -{ - char *ptr; - int c, size; - char zero_buf[1024]; - ssize_t actual; - errcode_t retval; - - if (flags & IMAGER_FLAG_INODEMAP) { - if (!fs->inode_map) { - retval = ext2fs_read_inode_bitmap(fs); - if (retval) - return retval; - } - ptr = fs->inode_map->bitmap; - size = (EXT2_INODES_PER_GROUP(fs->super) / 8); - } else { - if (!fs->block_map) { - retval = ext2fs_read_block_bitmap(fs); - if (retval) - return retval; - } - ptr = fs->block_map->bitmap; - size = EXT2_BLOCKS_PER_GROUP(fs->super) / 8; - } - size = size * fs->group_desc_count; - - actual = write(fd, ptr, size); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != size) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - size = size % fs->blocksize; - memset(zero_buf, 0, sizeof(zero_buf)); - if (size) { - size = fs->blocksize - size; - while (size) { - c = size; - if (c > sizeof(zero_buf)) - c = sizeof(zero_buf); - actual = write(fd, zero_buf, c); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != c) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - size -= c; - } - } - retval = 0; -errout: - return (retval); -} - - -/* - * Read the block/inode bitmaps. - */ -errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags) -{ - char *ptr, *buf = 0; - int size; - ssize_t actual; - errcode_t retval; - - if (flags & IMAGER_FLAG_INODEMAP) { - if (!fs->inode_map) { - retval = ext2fs_read_inode_bitmap(fs); - if (retval) - return retval; - } - ptr = fs->inode_map->bitmap; - size = (EXT2_INODES_PER_GROUP(fs->super) / 8); - } else { - if (!fs->block_map) { - retval = ext2fs_read_block_bitmap(fs); - if (retval) - return retval; - } - ptr = fs->block_map->bitmap; - size = EXT2_BLOCKS_PER_GROUP(fs->super) / 8; - } - size = size * fs->group_desc_count; - - buf = malloc(size); - if (!buf) - return ENOMEM; - - actual = read(fd, buf, size); - if (actual == -1) { - retval = errno; - goto errout; - } - if (actual != size) { - retval = EXT2_ET_SHORT_WRITE; - goto errout; - } - memcpy(ptr, buf, size); - - retval = 0; -errout: - if (buf) - free(buf); - return (retval); -} -- cgit v1.2.3