Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 1 | /* |
| 2 | * newdir.c --- create a new directory block |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 3 | * |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 4 | * Copyright (C) 1994, 1995 Theodore Ts'o. |
| 5 | * |
| 6 | * %Begin-Header% |
Theodore Ts'o | 543547a | 2010-05-17 21:31:56 -0400 | [diff] [blame] | 7 | * This file may be redistributed under the terms of the GNU Library |
| 8 | * General Public License, version 2. |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 9 | * %End-Header% |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
Theodore Ts'o | d1154eb | 2011-09-18 17:34:37 -0400 | [diff] [blame^] | 12 | #include "config.h" |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 13 | #include <stdio.h> |
| 14 | #include <string.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 15 | #if HAVE_UNISTD_H |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 16 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 17 | #endif |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 18 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 19 | #include "ext2_fs.h" |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 20 | #include "ext2fs.h" |
| 21 | |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 22 | #ifndef EXT2_FT_DIR |
| 23 | #define EXT2_FT_DIR 2 |
| 24 | #endif |
| 25 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 26 | /* |
| 27 | * Create new directory block |
| 28 | */ |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 29 | errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, |
| 30 | ext2_ino_t parent_ino, char **block) |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 31 | { |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 32 | struct ext2_dir_entry *dir = NULL; |
| 33 | errcode_t retval; |
| 34 | char *buf; |
| 35 | int rec_len; |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 36 | int filetype = 0; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 37 | |
Theodore Ts'o | f3db356 | 1997-04-26 13:34:30 +0000 | [diff] [blame] | 38 | EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
| 39 | |
Theodore Ts'o | c4e3d3f | 2003-08-01 09:41:07 -0400 | [diff] [blame] | 40 | retval = ext2fs_get_mem(fs->blocksize, &buf); |
Theodore Ts'o | 7b4e453 | 1997-10-26 03:41:24 +0000 | [diff] [blame] | 41 | if (retval) |
| 42 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 43 | memset(buf, 0, fs->blocksize); |
| 44 | dir = (struct ext2_dir_entry *) buf; |
Theodore Ts'o | 8a48035 | 2009-06-21 21:07:38 -0400 | [diff] [blame] | 45 | |
| 46 | retval = ext2fs_set_rec_len(fs, fs->blocksize, dir); |
| 47 | if (retval) |
| 48 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 49 | |
| 50 | if (dir_ino) { |
Theodore Ts'o | e5b38a5 | 2001-01-01 16:17:12 +0000 | [diff] [blame] | 51 | if (fs->super->s_feature_incompat & |
| 52 | EXT2_FEATURE_INCOMPAT_FILETYPE) |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 53 | filetype = EXT2_FT_DIR << 8; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 54 | /* |
| 55 | * Set up entry for '.' |
| 56 | */ |
| 57 | dir->inode = dir_ino; |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 58 | dir->name_len = 1 | filetype; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 59 | dir->name[0] = '.'; |
Theodore Ts'o | 5dd77db | 2008-08-25 21:08:19 -0400 | [diff] [blame] | 60 | rec_len = fs->blocksize - EXT2_DIR_REC_LEN(1); |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 61 | dir->rec_len = EXT2_DIR_REC_LEN(1); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 62 | |
| 63 | /* |
| 64 | * Set up entry for '..' |
| 65 | */ |
| 66 | dir = (struct ext2_dir_entry *) (buf + dir->rec_len); |
Theodore Ts'o | 8a48035 | 2009-06-21 21:07:38 -0400 | [diff] [blame] | 67 | retval = ext2fs_set_rec_len(fs, rec_len, dir); |
| 68 | if (retval) |
| 69 | return retval; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 70 | dir->inode = parent_ino; |
Theodore Ts'o | e6198e5 | 1999-10-23 00:58:54 +0000 | [diff] [blame] | 71 | dir->name_len = 2 | filetype; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 72 | dir->name[0] = '.'; |
| 73 | dir->name[1] = '.'; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 74 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 75 | } |
| 76 | *block = buf; |
| 77 | return 0; |
| 78 | } |