This source file includes following definitions.
- minix_dir_read
- minix_readdir
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8
9 #include <asm/segment.h>
10
11 #include <linux/errno.h>
12 #include <linux/fs.h>
13 #include <linux/minix_fs.h>
14 #include <linux/stat.h>
15
16 static int minix_dir_read(struct inode * inode, struct file * filp, char * buf, int count)
17 {
18 return -EISDIR;
19 }
20
21 static int minix_readdir(struct inode *, struct file *, struct dirent *, int);
22
23 static struct file_operations minix_dir_operations = {
24 NULL,
25 minix_dir_read,
26 NULL,
27 minix_readdir,
28 NULL,
29 NULL,
30 NULL,
31 NULL,
32 NULL
33 };
34
35
36
37
38 struct inode_operations minix_dir_inode_operations = {
39 &minix_dir_operations,
40 minix_create,
41 minix_lookup,
42 minix_link,
43 minix_unlink,
44 minix_symlink,
45 minix_mkdir,
46 minix_rmdir,
47 minix_mknod,
48 minix_rename,
49 NULL,
50 NULL,
51 NULL,
52 minix_truncate,
53 NULL
54 };
55
56 static int minix_readdir(struct inode * inode, struct file * filp,
57 struct dirent * dirent, int count)
58 {
59 unsigned int offset,i;
60 char c;
61 struct buffer_head * bh;
62 struct minix_dir_entry * de;
63
64 if (!inode || !S_ISDIR(inode->i_mode))
65 return -EBADF;
66 if (filp->f_pos & (sizeof (struct minix_dir_entry) - 1))
67 return -EBADF;
68 while (filp->f_pos < inode->i_size) {
69 offset = filp->f_pos & 1023;
70 bh = minix_bread(inode,(filp->f_pos)>>BLOCK_SIZE_BITS,0);
71 if (!bh) {
72 filp->f_pos += 1024-offset;
73 continue;
74 }
75 de = (struct minix_dir_entry *) (offset + bh->b_data);
76 while (offset < 1024 && filp->f_pos < inode->i_size) {
77 offset += sizeof (struct minix_dir_entry);
78 filp->f_pos += sizeof (struct minix_dir_entry);
79 if (de->inode) {
80 for (i = 0; i < MINIX_NAME_LEN; i++)
81 if ((c = de->name[i]) != 0)
82 put_fs_byte(c,i+dirent->d_name);
83 else
84 break;
85 if (i) {
86 put_fs_long(de->inode,&dirent->d_ino);
87 put_fs_byte(0,i+dirent->d_name);
88 put_fs_word(i,&dirent->d_reclen);
89 brelse(bh);
90 return i;
91 }
92 }
93 de++;
94 }
95 brelse(bh);
96 }
97 return 0;
98 }