1 /*
2 * Copyright (c) 2006-2023, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 */
9
10 #include "proc.h"
11 #include "procfs.h"
12
13 #include <rthw.h>
14 #include <rtdbg.h>
15
16 #include <fcntl.h>
17 #include <errno.h>
18
19 #include <dfs_dentry.h>
20
seq_start(struct dfs_seq_file * seq,off_t * index)21 static void *seq_start(struct dfs_seq_file *seq, off_t *index)
22 {
23 off_t i = *index; // seq->index
24
25 return NULL + (i == 0);
26 }
27
seq_stop(struct dfs_seq_file * seq,void * data)28 static void seq_stop(struct dfs_seq_file *seq, void *data)
29 {
30 }
31
seq_next(struct dfs_seq_file * seq,void * data,off_t * index)32 static void *seq_next(struct dfs_seq_file *seq, void *data, off_t *index)
33 {
34 /* data: The return value of the start or next*/
35 off_t i = *index + 1; // seq->index
36
37 *index = i;
38
39 return NULL;
40 }
41
seq_show(struct dfs_seq_file * seq,void * data)42 static int seq_show(struct dfs_seq_file *seq, void *data)
43 {
44 /* data: The return value of the start or next*/
45 dfs_seq_puts(seq, "rt_weak const struct dfs_seq_ops *cpuinfo_get_seq_ops(void)\n--need your own function--\n");
46
47 return 0;
48 }
49
50 static const struct dfs_seq_ops seq_ops = {
51 .start = seq_start,
52 .stop = seq_stop,
53 .next = seq_next,
54 .show = seq_show,
55 };
56
cpuinfo_get_seq_ops(void)57 rt_weak const struct dfs_seq_ops *cpuinfo_get_seq_ops(void)
58 {
59 return &seq_ops;
60 }
61
proc_open(struct dfs_file * file)62 static int proc_open(struct dfs_file *file)
63 {
64 return dfs_seq_open(file, cpuinfo_get_seq_ops());
65 }
66
proc_close(struct dfs_file * file)67 static int proc_close(struct dfs_file *file)
68 {
69 return dfs_seq_release(file);
70 }
71
72 static const struct dfs_file_ops file_ops = {
73 .open = proc_open,
74 .read = dfs_seq_read,
75 .lseek = dfs_seq_lseek,
76 .close = proc_close,
77 };
78
proc_cpuinfo_init(void)79 int proc_cpuinfo_init(void)
80 {
81 struct proc_dentry *dentry = proc_create_data("cpuinfo", 0, NULL, &file_ops, NULL);
82 proc_release(dentry);
83
84 return 0;
85 }
86 INIT_ENV_EXPORT(proc_cpuinfo_init);
87