1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __API_FS__
 3#define __API_FS__
 4
 5#include <stdbool.h>
 6#include <unistd.h>
 7
 8/*
 9 * On most systems <limits.h> would have given us this, but  not on some systems
10 * (e.g. GNU/Hurd).
11 */
12#ifndef PATH_MAX
13#define PATH_MAX 4096
14#endif
15
16#define FS(name)				\
17	const char *name##__mountpoint(void);	\
18	const char *name##__mount(void);	\
19	bool name##__configured(void);		\
20
21/*
22 * The xxxx__mountpoint() entry points find the first match mount point for each
23 * filesystems listed below, where xxxx is the filesystem type.
24 *
25 * The interface is as follows:
26 *
27 * - If a mount point is found on first call, it is cached and used for all
28 *   subsequent calls.
29 *
30 * - If a mount point is not found, NULL is returned on first call and all
31 *   subsequent calls.
32 */
33FS(sysfs)
34FS(procfs)
35FS(debugfs)
36FS(tracefs)
37FS(hugetlbfs)
38FS(bpf_fs)
39
40#undef FS
41
42
43int cgroupfs_find_mountpoint(char *buf, size_t maxlen, const char *subsys);
44
45int filename__read_int(const char *filename, int *value);
46int filename__read_ull(const char *filename, unsigned long long *value);
47int filename__read_xll(const char *filename, unsigned long long *value);
48int filename__read_str(const char *filename, char **buf, size_t *sizep);
49
50int filename__write_int(const char *filename, int value);
51
52int procfs__read_str(const char *entry, char **buf, size_t *sizep);
53
54int sysctl__read_int(const char *sysctl, int *value);
55int sysfs__read_int(const char *entry, int *value);
56int sysfs__read_ull(const char *entry, unsigned long long *value);
57int sysfs__read_xll(const char *entry, unsigned long long *value);
58int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
59int sysfs__read_bool(const char *entry, bool *value);
60
61int sysfs__write_int(const char *entry, int value);
62#endif /* __API_FS__ */

 
 1#ifndef __API_FS__
 2#define __API_FS__
 3
 4#include <stdbool.h>
 5#include <unistd.h>
 6
 7/*
 8 * On most systems <limits.h> would have given us this, but  not on some systems
 9 * (e.g. GNU/Hurd).
10 */
11#ifndef PATH_MAX
12#define PATH_MAX 4096
13#endif
14
15#define FS(name)				\
16	const char *name##__mountpoint(void);	\
17	const char *name##__mount(void);	\
18	bool name##__configured(void);		\
19
 
 
 
 
 
 
 
 
 
 
 
 
20FS(sysfs)
21FS(procfs)
22FS(debugfs)
23FS(tracefs)
24FS(hugetlbfs)
 
25
26#undef FS
27
28
 
 
29int filename__read_int(const char *filename, int *value);
30int filename__read_ull(const char *filename, unsigned long long *value);
 
31int filename__read_str(const char *filename, char **buf, size_t *sizep);
32
 
 
33int procfs__read_str(const char *entry, char **buf, size_t *sizep);
34
35int sysctl__read_int(const char *sysctl, int *value);
36int sysfs__read_int(const char *entry, int *value);
37int sysfs__read_ull(const char *entry, unsigned long long *value);
 
38int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
 
 
 
39#endif /* __API_FS__ */