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 FS(sysfs) 22 FS(procfs) 23 FS(debugfs) 24 FS(tracefs) 25 FS(hugetlbfs) 26 FS(bpf_fs) 27 28 #undef FS 29 30 31 int cgroupfs_find_mountpoint(char *buf, size_t maxlen, const char *subsys); 32 33 int filename__read_int(const char *filename, int *value); 34 int filename__read_ull(const char *filename, unsigned long long *value); 35 int filename__read_xll(const char *filename, unsigned long long *value); 36 int filename__read_str(const char *filename, char **buf, size_t *sizep); 37 38 int filename__write_int(const char *filename, int value); 39 40 int procfs__read_str(const char *entry, char **buf, size_t *sizep); 41 42 int sysctl__read_int(const char *sysctl, int *value); 43 int sysfs__read_int(const char *entry, int *value); 44 int sysfs__read_ull(const char *entry, unsigned long long *value); 45 int sysfs__read_xll(const char *entry, unsigned long long *value); 46 int sysfs__read_str(const char *entry, char **buf, size_t *sizep); 47 int sysfs__read_bool(const char *entry, bool *value); 48 49 int sysfs__write_int(const char *entry, int value); 50 #endif /* __API_FS__ */ 51