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 NULL
34 };
35
36
37
38
39 struct inode_operations minix_dir_inode_operations = {
40 &minix_dir_operations,
41 minix_create,
42 minix_lookup,
43 minix_link,
44 minix_unlink,
45 minix_symlink,
46 minix_mkdir,
47 minix_rmdir,
48 minix_mknod,
49 minix_rename,
50 NULL,
51 NULL,
52 NULL,
53 minix_truncate,
54 NULL
55 };
56
57 static int minix_readdir(struct inode * inode, struct file * filp,
58 struct dirent * dirent, int count)
59 {
60 unsigned int offset,i;
61 char c;
62 struct buffer_head * bh;
63 struct minix_dir_entry * de;
64
65 if (!inode || !S_ISDIR(inode->i_mode))
66 return -EBADF;
67 if (filp->f_pos & (sizeof (struct minix_dir_entry) - 1))
68 return -EBADF;
69 while (filp->f_pos < inode->i_size) {
70 offset = filp->f_pos & 1023;
71 bh = minix_bread(inode,(filp->f_pos)>>BLOCK_SIZE_BITS,0);
72 if (!bh) {
73 filp->f_pos += 1024-offset;
74 continue;
75 }
76 de = (struct minix_dir_entry *) (offset + bh->b_data);
77 while (offset < 1024 && filp->f_pos < inode->i_size) {
78 offset += sizeof (struct minix_dir_entry);
79 filp->f_pos += sizeof (struct minix_dir_entry);
80 if (de->inode) {
81 for (i = 0; i < MINIX_NAME_LEN; i++)
82 if ((c = de->name[i]) != 0)
83 put_fs_byte(c,i+dirent->d_name);
84 else
85 break;
86 if (i) {
87 put_fs_long(de->inode,&dirent->d_ino);
88 put_fs_byte(0,i+dirent->d_name);
89 put_fs_word(i,&dirent->d_reclen);
90 brelse(bh);
91 return i;
92 }
93 }
94 de++;
95 }
96 brelse(bh);
97 }
98 return 0;
99 }