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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_FS__
#define __API_FS__
#include <stdbool.h>
#include <unistd.h>
/*
* On most systems <limits.h> would have given us this, but not on some systems
* (e.g. GNU/Hurd).
*/
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
#define FS(name) \
const char *name##__mountpoint(void); \
const char *name##__mount(void); \
bool name##__configured(void); \
/*
* The xxxx__mountpoint() entry points find the first match mount point for each
* filesystems listed below, where xxxx is the filesystem type.
*
* The interface is as follows:
*
* - If a mount point is found on first call, it is cached and used for all
* subsequent calls.
*
* - If a mount point is not found, NULL is returned on first call and all
* subsequent calls.
*/
FS(sysfs)
FS(procfs)
FS(debugfs)
FS(tracefs)
FS(hugetlbfs)
FS(bpf_fs)
#undef FS
int cgroupfs_find_mountpoint(char *buf, size_t maxlen, const char *subsys);
int filename__read_int(const char *filename, int *value);
int filename__read_ull(const char *filename, unsigned long long *value);
int filename__read_xll(const char *filename, unsigned long long *value);
int filename__read_str(const char *filename, char **buf, size_t *sizep);
int filename__write_int(const char *filename, int value);
int procfs__read_str(const char *entry, char **buf, size_t *sizep);
int sysctl__read_int(const char *sysctl, int *value);
int sysfs__read_int(const char *entry, int *value);
int sysfs__read_ull(const char *entry, unsigned long long *value);
int sysfs__read_xll(const char *entry, unsigned long long *value);
int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
int sysfs__read_bool(const char *entry, bool *value);
int sysfs__write_int(const char *entry, int value);
#endif /* __API_FS__ */
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