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
zalloc(size_t size)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