diff options
Diffstat (limited to 'e2fsprogs/ext2fs/link.c')
-rw-r--r-- | e2fsprogs/ext2fs/link.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/e2fsprogs/ext2fs/link.c b/e2fsprogs/ext2fs/link.c deleted file mode 100644 index 08b2e96..0000000 --- a/e2fsprogs/ext2fs/link.c +++ /dev/null @@ -1,135 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * link.c --- create links in a ext2fs directory - * - * Copyright (C) 1993, 1994 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <stdio.h> -#include <string.h> -#if HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "ext2_fs.h" -#include "ext2fs.h" - -struct link_struct { - const char *name; - int namelen; - ext2_ino_t inode; - int flags; - int done; - struct ext2_super_block *sb; -}; - -static int link_proc(struct ext2_dir_entry *dirent, - int offset, - int blocksize, - char *buf, - void *priv_data) -{ - struct link_struct *ls = (struct link_struct *) priv_data; - struct ext2_dir_entry *next; - int rec_len, min_rec_len; - int ret = 0; - - rec_len = EXT2_DIR_REC_LEN(ls->namelen); - - /* - * See if the following directory entry (if any) is unused; - * if so, absorb it into this one. - */ - next = (struct ext2_dir_entry *) (buf + offset + dirent->rec_len); - if ((offset + dirent->rec_len < blocksize - 8) && - (next->inode == 0) && - (offset + dirent->rec_len + next->rec_len <= blocksize)) { - dirent->rec_len += next->rec_len; - ret = DIRENT_CHANGED; - } - - /* - * If the directory entry is used, see if we can split the - * directory entry to make room for the new name. If so, - * truncate it and return. - */ - if (dirent->inode) { - min_rec_len = EXT2_DIR_REC_LEN(dirent->name_len & 0xFF); - if (dirent->rec_len < (min_rec_len + rec_len)) - return ret; - rec_len = dirent->rec_len - min_rec_len; - dirent->rec_len = min_rec_len; - next = (struct ext2_dir_entry *) (buf + offset + - dirent->rec_len); - next->inode = 0; - next->name_len = 0; - next->rec_len = rec_len; - return DIRENT_CHANGED; - } - - /* - * If we get this far, then the directory entry is not used. - * See if we can fit the request entry in. If so, do it. - */ - if (dirent->rec_len < rec_len) - return ret; - dirent->inode = ls->inode; - dirent->name_len = ls->namelen; - strncpy(dirent->name, ls->name, ls->namelen); - if (ls->sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_FILETYPE) - dirent->name_len |= (ls->flags & 0x7) << 8; - - ls->done++; - return DIRENT_ABORT|DIRENT_CHANGED; -} - -/* - * Note: the low 3 bits of the flags field are used as the directory - * entry filetype. - */ -#ifdef __TURBOC__ -# pragma argsused -#endif -errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, - ext2_ino_t ino, int flags) -{ - errcode_t retval; - struct link_struct ls; - struct ext2_inode inode; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - if (!(fs->flags & EXT2_FLAG_RW)) - return EXT2_ET_RO_FILSYS; - - ls.name = name; - ls.namelen = name ? strlen(name) : 0; - ls.inode = ino; - ls.flags = flags; - ls.done = 0; - ls.sb = fs->super; - - retval = ext2fs_dir_iterate(fs, dir, DIRENT_FLAG_INCLUDE_EMPTY, - 0, link_proc, &ls); - if (retval) - return retval; - - if (!ls.done) - return EXT2_ET_DIR_NO_SPACE; - - if ((retval = ext2fs_read_inode(fs, dir, &inode)) != 0) - return retval; - - if (inode.i_flags & EXT2_INDEX_FL) { - inode.i_flags &= ~EXT2_INDEX_FL; - if ((retval = ext2fs_write_inode(fs, dir, &inode)) != 0) - return retval; - } - - return 0; -} |