1 #ifndef _LINUX_SEQ_FILE_H
2 #define _LINUX_SEQ_FILE_H
3 #ifdef __KERNEL__
4
5 #include <linux/types.h>
6 #include <linux/string.h>
7 #include <asm/semaphore.h>
8
9 struct seq_operations;
10 struct file;
11 struct vfsmount;
12 struct dentry;
13 struct inode;
14
15 struct seq_file {
16 char *buf;
17 size_t size;
18 size_t from;
19 size_t count;
20 loff_t index;
21 struct semaphore sem;
22 struct seq_operations *op;
23 void *private;
24 };
25
26 struct seq_operations {
27 void * (*start) (struct seq_file *m, loff_t *pos);
28 void (*stop) (struct seq_file *m, void *v);
29 void * (*next) (struct seq_file *m, void *v, loff_t *pos);
30 int (*show) (struct seq_file *m, void *v);
31 };
32
33 int seq_open(struct file *, struct seq_operations *);
34 ssize_t seq_read(struct file *, char *, size_t, loff_t *);
35 loff_t seq_lseek(struct file *, loff_t, int);
36 int seq_release(struct inode *, struct file *);
37 int seq_escape(struct seq_file *, const char *, const char *);
38
seq_putc(struct seq_file * m,char c)39 static inline int seq_putc(struct seq_file *m, char c)
40 {
41 if (m->count < m->size) {
42 m->buf[m->count++] = c;
43 return 0;
44 }
45 return -1;
46 }
47
seq_puts(struct seq_file * m,const char * s)48 static inline int seq_puts(struct seq_file *m, const char *s)
49 {
50 int len = strlen(s);
51 if (m->count + len < m->size) {
52 memcpy(m->buf + m->count, s, len);
53 m->count += len;
54 return 0;
55 }
56 m->count = m->size;
57 return -1;
58 }
59
60 int seq_printf(struct seq_file *, const char *, ...)
61 __attribute__ ((format (printf,2,3)));
62
63 int seq_path(struct seq_file *, struct vfsmount *, struct dentry *, char *);
64
65 int single_open(struct file *, int (*)(struct seq_file *, void *), void *);
66 int single_release(struct inode *, struct file *);
67 int seq_release_private(struct inode *, struct file *);
68
69 #define SEQ_START_TOKEN ((void *)1)
70
71 #endif
72 #endif
73