1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef GIT_COMPAT_UTIL_H 3 #define GIT_COMPAT_UTIL_H 4 5 #define _BSD_SOURCE 1 6 /* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */ 7 #define _DEFAULT_SOURCE 1 8 9 #include <stdbool.h> 10 #include <stddef.h> 11 #include <stdlib.h> 12 #include <stdarg.h> 13 #include <linux/compiler.h> 14 #include <linux/types.h> 15 #include "namespaces.h" 16 17 /* General helper functions */ 18 void usage(const char *err) __noreturn; 19 void die(const char *err, ...) __noreturn __printf(1, 2); 20 21 static inline void *zalloc(size_t size) 22 { 23 return calloc(1, size); 24 } 25 26 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) 27 28 struct dirent; 29 struct strlist; 30 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); 38 39 ssize_t readn(int fd, void *buf, size_t n); 40 ssize_t writen(int fd, const void *buf, size_t n); 41 42 size_t hex_width(u64 v); 43 int hex2u64(const char *ptr, u64 *val); 44 45 extern unsigned int page_size; 46 extern int cacheline_size; 47 48 int fetch_kernel_version(unsigned int *puint, 49 char *str, size_t str_sz); 50 #define KVER_VERSION(x) (((x) >> 16) & 0xff) 51 #define KVER_PATCHLEVEL(x) (((x) >> 8) & 0xff) 52 #define KVER_SUBLEVEL(x) ((x) & 0xff) 53 #define KVER_FMT "%d.%d.%d" 54 #define KVER_PARAM(x) KVER_VERSION(x), KVER_PATCHLEVEL(x), KVER_SUBLEVEL(x) 55 56 const char *perf_tip(const char *dirpath); 57 58 #ifndef HAVE_SCHED_GETCPU_SUPPORT 59 int sched_getcpu(void); 60 #endif 61 62 #ifndef HAVE_SETNS_SUPPORT 63 int setns(int fd, int nstype); 64 #endif 65 66 extern bool perf_singlethreaded; 67 68 void perf_set_singlethreaded(void); 69 void perf_set_multithreaded(void); 70 71 #ifndef O_CLOEXEC 72 #ifdef __sparc__ 73 #define O_CLOEXEC 0x400000 74 #elif defined(__alpha__) || defined(__hppa__) 75 #define O_CLOEXEC 010000000 76 #else 77 #define O_CLOEXEC 02000000 78 #endif 79 #endif 80 81 #endif /* GIT_COMPAT_UTIL_H */ 82