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 <fcntl.h> 10 #include <stdbool.h> 11 #include <stddef.h> 12 #include <stdlib.h> 13 #include <stdarg.h> 14 #include <linux/compiler.h> 15 #include <linux/types.h> 16 #include "namespaces.h" 17 18 /* General helper functions */ 19 void usage(const char *err) __noreturn; 20 void die(const char *err, ...) __noreturn __printf(1, 2); 21 22 static inline void *zalloc(size_t size) 23 { 24 return calloc(1, size); 25 } 26 27 #define zfree(ptr) ({ free(*ptr); *ptr = NULL; }) 28 29 struct dirent; 30 struct strlist; 31 32 int mkdir_p(char *path, mode_t mode); 33 int rm_rf(const char *path); 34 struct strlist *lsdir(const char *name, bool (*filter)(const char *, struct dirent *)); 35 bool lsdir_no_dot_filter(const char *name, struct dirent *d); 36 int copyfile(const char *from, const char *to); 37 int copyfile_mode(const char *from, const char *to, mode_t mode); 38 int copyfile_ns(const char *from, const char *to, struct nsinfo *nsi); 39 int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size); 40 41 ssize_t readn(int fd, void *buf, size_t n); 42 ssize_t writen(int fd, const void *buf, size_t n); 43 44 size_t hex_width(u64 v); 45 int hex2u64(const char *ptr, u64 *val); 46 47 extern unsigned int page_size; 48 extern int cacheline_size; 49 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) 57 58 const char *perf_tip(const char *dirpath); 59 60 #ifndef HAVE_SCHED_GETCPU_SUPPORT 61 int sched_getcpu(void); 62 #endif 63 64 #ifndef HAVE_SETNS_SUPPORT 65 int setns(int fd, int nstype); 66 #endif 67 68 #endif /* GIT_COMPAT_UTIL_H */ 69