1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef GIT_COMPAT_UTIL_H
3 #define GIT_COMPAT_UTIL_H
6 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
7 #define _DEFAULT_SOURCE 1
13 #include <linux/compiler.h>
14 #include <sys/types.h>
16 /* General helper functions */
17 void usage(const char *err) __noreturn;
18 void die(const char *err, ...) __noreturn __printf(1, 2);
20 static inline void *zalloc(size_t size)
22 return calloc(1, size);
25 #define zfree(ptr) ({ free((void *)*ptr); *ptr = NULL; })
31 int mkdir_p(char *path, mode_t mode);
32 int rm_rf(const char *path);
33 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *));
34 bool lsdir_no_dot_filter(const char *name, struct dirent *d);
35 int copyfile(const char *from, const char *to);
36 int copyfile_mode(const char *from, const char *to, mode_t mode);
37 int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi);
39 ssize_t readn(int fd, void *buf, size_t n);
40 ssize_t writen(int fd, const void *buf, size_t n);
42 size_t hex_width(u64 v);
43 int hex2u64(const char *ptr, u64 *val);
45 extern unsigned int page_size;
46 int __pure cacheline_size(void);
48 int sysctl__max_stack(void);
50 int fetch_kernel_version(unsigned int *puint,
51 char *str, size_t str_sz);
52 #define KVER_VERSION(x) (((x) >> 16) & 0xff)
53 #define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff)
54 #define KVER_SUBLEVEL(x) ((x) & 0xff)
55 #define KVER_FMT "%d.%d.%d"
56 #define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x)
58 const char *perf_tip(const char *dirpath);
60 #ifndef HAVE_GET_CURRENT_DIR_NAME
61 char *get_current_dir_name(void);
64 #ifndef HAVE_SCHED_GETCPU_SUPPORT
65 int sched_getcpu(void);
68 #ifndef HAVE_SETNS_SUPPORT
69 int setns(int fd, int nstype);
72 extern bool perf_singlethreaded;
74 void perf_set_singlethreaded(void);
75 void perf_set_multithreaded(void);
79 #define O_CLOEXEC 0x400000
80 #elif defined(__alpha__) || defined(__hppa__)
81 #define O_CLOEXEC 010000000
83 #define O_CLOEXEC 02000000
87 #endif /* GIT_COMPAT_UTIL_H */