1 /*
2 * mkdir.c --- make a directory in the filesystem
3 *
4 * Copyright (C) 1994, 1995 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12 #include <stdio.h>
13 #include <string.h>
14 #if HAVE_UNISTD_H
15 #include <unistd.h>
16 #endif
17 #include <fcntl.h>
18 #include <time.h>
19 #if HAVE_SYS_STAT_H
20 #include <sys/stat.h>
21 #endif
22 #if HAVE_SYS_TYPES_H
23 #include <sys/types.h>
24 #endif
25
26 #include "ext2_fs.h"
27 #include "ext2fs.h"
28
29 #ifndef EXT2_FT_DIR
30 #define EXT2_FT_DIR 2
31 #endif
32
ext2fs_mkdir(ext2_filsys fs,ext2_ino_t parent,ext2_ino_t inum,const char * name)33 errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
34 const char *name)
35 {
36 errcode_t retval;
37 struct ext2_inode parent_inode, inode;
38 ext2_ino_t ino = inum;
39 ext2_ino_t scratch_ino;
40 blk_t blk;
41 char *block = 0;
42
43 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
44
45 /*
46 * Allocate an inode, if necessary
47 */
48 if (!ino) {
49 retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
50 0, &ino);
51 if (retval)
52 goto cleanup;
53 }
54
55 /*
56 * Allocate a data block for the directory
57 */
58 retval = ext2fs_new_block(fs, 0, 0, &blk);
59 if (retval)
60 goto cleanup;
61
62 /*
63 * Create a scratch template for the directory
64 */
65 retval = ext2fs_new_dir_block(fs, ino, parent, &block);
66 if (retval)
67 goto cleanup;
68
69 /*
70 * Get the parent's inode, if necessary
71 */
72 if (parent != ino) {
73 retval = ext2fs_read_inode(fs, parent, &parent_inode);
74 if (retval)
75 goto cleanup;
76 } else
77 memset(&parent_inode, 0, sizeof(parent_inode));
78
79 /*
80 * Create the inode structure....
81 */
82 memset(&inode, 0, sizeof(struct ext2_inode));
83 inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
84 inode.i_uid = inode.i_gid = 0;
85 inode.i_blocks = fs->blocksize / 512;
86 inode.i_block[0] = blk;
87 inode.i_links_count = 2;
88 inode.i_ctime = inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(NULL);
89 inode.i_size = fs->blocksize;
90
91 /*
92 * Write out the inode and inode data block
93 */
94 retval = ext2fs_write_dir_block(fs, blk, block);
95 if (retval)
96 goto cleanup;
97 retval = ext2fs_write_new_inode(fs, ino, &inode);
98 if (retval)
99 goto cleanup;
100
101 /*
102 * Link the directory into the filesystem hierarchy
103 */
104 if (name) {
105 retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
106 &scratch_ino);
107 if (!retval) {
108 retval = EXT2_ET_DIR_EXISTS;
109 name = 0;
110 goto cleanup;
111 }
112 if (retval != EXT2_ET_FILE_NOT_FOUND)
113 goto cleanup;
114 retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
115 if (retval)
116 goto cleanup;
117 }
118
119 /*
120 * Update parent inode's counts
121 */
122 if (parent != ino) {
123 parent_inode.i_links_count++;
124 retval = ext2fs_write_inode(fs, parent, &parent_inode);
125 if (retval)
126 goto cleanup;
127 }
128
129 /*
130 * Update accounting....
131 */
132 ext2fs_block_alloc_stats(fs, blk, +1);
133 ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
134
135 cleanup:
136 if (block)
137 ext2fs_free_mem(&block);
138 return retval;
139
140 }
141
142
143