1 /*
2 * No copyright is claimed. This code is in the public domain; do with
3 * it what you wish.
4 */
5 #ifndef UTIL_LINUX_PATH_H
6 #define UTIL_LINUX_PATH_H
7
8 #include <stdio.h>
9 #include <stdint.h>
10 #include <sys/stat.h>
11 #include <sys/types.h>
12 #include <dirent.h>
13
14 #include "c.h"
15
16 struct path_cxt {
17 int dir_fd;
18 char *dir_path;
19
20 int refcount;
21
22 char *prefix;
23 char path_buffer[PATH_MAX];
24
25 void *dialect;
26 void (*free_dialect)(struct path_cxt *);
27 int (*redirect_on_enoent)(struct path_cxt *, const char *, int *);
28 };
29
30 struct path_cxt *ul_new_path(const char *dir, ...)
31 __attribute__ ((__format__ (__printf__, 1, 2)));
32 void ul_unref_path(struct path_cxt *pc);
33 void ul_ref_path(struct path_cxt *pc);
34
35 void ul_path_init_debug(void);
36
37 int ul_path_set_prefix(struct path_cxt *pc, const char *prefix);
38 const char *ul_path_get_prefix(struct path_cxt *pc);
39
40 int ul_path_set_dir(struct path_cxt *pc, const char *dir);
41 const char *ul_path_get_dir(struct path_cxt *pc);
42
43 int ul_path_set_dialect(struct path_cxt *pc, void *data, void free_data(struct path_cxt *));
44 void *ul_path_get_dialect(struct path_cxt *pc);
45
46 int ul_path_set_enoent_redirect(struct path_cxt *pc, int (*func)(struct path_cxt *, const char *, int *));
47 int ul_path_get_dirfd(struct path_cxt *pc);
48 void ul_path_close_dirfd(struct path_cxt *pc);
49 int ul_path_isopen_dirfd(struct path_cxt *pc);
50 int ul_path_is_accessible(struct path_cxt *pc);
51
52 char *ul_path_get_abspath(struct path_cxt *pc, char *buf, size_t bufsz, const char *path, ...)
53 __attribute__ ((__format__ (__printf__, 4, 5)));
54
55 int ul_path_stat(struct path_cxt *pc, struct stat *sb, int flags, const char *path);
56 int ul_path_access(struct path_cxt *pc, int mode, const char *path);
57 int ul_path_accessf(struct path_cxt *pc, int mode, const char *path, ...)
58 __attribute__ ((__format__ (__printf__, 3, 4)));
59
60 int ul_path_open(struct path_cxt *pc, int flags, const char *path);
61 int ul_path_openf(struct path_cxt *pc, int flags, const char *path, ...)
62 __attribute__ ((__format__ (__printf__, 3, 4)));
63 int ul_path_vopenf(struct path_cxt *pc, int flags, const char *path, va_list ap)
64 __attribute__ ((__format__ (__printf__, 3, 0)));
65
66 FILE *ul_path_fopen(struct path_cxt *pc, const char *mode, const char *path);
67 FILE *ul_path_fopenf(struct path_cxt *pc, const char *mode, const char *path, ...)
68 __attribute__ ((__format__ (__printf__, 3, 4)));
69 FILE *ul_path_vfopenf(struct path_cxt *pc, const char *mode, const char *path, va_list ap)
70 __attribute__ ((__format__ (__printf__, 3, 0)));
71
72 DIR *ul_path_opendir(struct path_cxt *pc, const char *path);
73 DIR *ul_path_vopendirf(struct path_cxt *pc, const char *path, va_list ap)
74 __attribute__ ((__format__ (__printf__, 2, 0)));
75 DIR *ul_path_opendirf(struct path_cxt *pc, const char *path, ...)
76 __attribute__ ((__format__ (__printf__, 2, 3)));
77
78 ssize_t ul_path_readlink(struct path_cxt *pc, char *buf, size_t bufsiz, const char *path);
79 ssize_t ul_path_readlinkf(struct path_cxt *pc, char *buf, size_t bufsiz, const char *path, ...)
80 __attribute__ ((__format__ (__printf__, 4, 5)));
81
82 int ul_path_read(struct path_cxt *pc, char *buf, size_t len, const char *path);
83 int ul_path_vreadf(struct path_cxt *pc, char *buf, size_t len, const char *path, va_list ap)
84 __attribute__ ((__format__ (__printf__, 4, 0)));
85 int ul_path_readf(struct path_cxt *pc, char *buf, size_t len, const char *path, ...)
86 __attribute__ ((__format__ (__printf__, 4, 5)));
87
88 int ul_path_read_string(struct path_cxt *pc, char **str, const char *path);
89 int ul_path_readf_string(struct path_cxt *pc, char **str, const char *path, ...)
90 __attribute__ ((__format__ (__printf__, 3, 4)));
91
92 int ul_path_read_buffer(struct path_cxt *pc, char *buf, size_t bufsz, const char *path);
93 int ul_path_readf_buffer(struct path_cxt *pc, char *buf, size_t bufsz, const char *path, ...)
94 __attribute__ ((__format__ (__printf__, 4, 5)));
95
96 int ul_path_scanf(struct path_cxt *pc, const char *path, const char *fmt, ...)
97 __attribute__ ((__format__ (__scanf__, 3, 4)));
98 int ul_path_scanff(struct path_cxt *pc, const char *path, va_list ap, const char *fmt, ...)
99 __attribute__ ((__format__ (__printf__, 2, 0)))
100 __attribute__ ((__format__ (__scanf__, 4, 5)));
101
102 int ul_path_read_majmin(struct path_cxt *pc, dev_t *res, const char *path);
103 int ul_path_readf_majmin(struct path_cxt *pc, dev_t *res, const char *path, ...)
104 __attribute__ ((__format__ (__printf__, 3, 4)));
105
106 int ul_path_read_u32(struct path_cxt *pc, uint32_t *res, const char *path);
107 int ul_path_readf_u32(struct path_cxt *pc, uint32_t *res, const char *path, ...)
108 __attribute__ ((__format__ (__printf__, 3, 4)));
109
110 int ul_path_read_s32(struct path_cxt *pc, int32_t *res, const char *path);
111 int ul_path_readf_s32(struct path_cxt *pc, int32_t *res, const char *path, ...)
112 __attribute__ ((__format__ (__printf__, 3, 4)));
113
114 int ul_path_read_u64(struct path_cxt *pc, uint64_t *res, const char *path);
115 int ul_path_readf_u64(struct path_cxt *pc, uint64_t *res, const char *path, ...)
116 __attribute__ ((__format__ (__printf__, 3, 4)));
117
118 int ul_path_read_s64(struct path_cxt *pc, int64_t *res, const char *path);
119 int ul_path_readf_s64(struct path_cxt *pc, int64_t *res, const char *path, ...)
120 __attribute__ ((__format__ (__printf__, 3, 4)));
121
122 int ul_path_write_string(struct path_cxt *pc, const char *str, const char *path);
123 int ul_path_writef_string(struct path_cxt *pc, const char *str, const char *path, ...)
124 __attribute__ ((__format__ (__printf__, 3, 4)));
125
126 int ul_path_write_s64(struct path_cxt *pc, int64_t num, const char *path);
127 int ul_path_write_u64(struct path_cxt *pc, uint64_t num, const char *path);
128 int ul_path_writef_u64(struct path_cxt *pc, uint64_t num, const char *path, ...)
129 __attribute__ ((__format__ (__printf__, 3, 4)));
130
131 int ul_path_count_dirents(struct path_cxt *pc, const char *path);
132 int ul_path_countf_dirents(struct path_cxt *pc, const char *path, ...)
133 __attribute__ ((__format__ (__printf__, 2, 3)));
134
135 int ul_path_next_dirent(struct path_cxt *pc, DIR **sub, const char *dirname, struct dirent **d);
136
137 FILE *ul_prefix_fopen(const char *prefix, const char *path, const char *mode);
138
139
140 #ifdef HAVE_CPU_SET_T
141 # include "cpuset.h"
142 int ul_path_readf_cpuset(struct path_cxt *pc, cpu_set_t **set, int maxcpus, const char *path, ...)
143 __attribute__ ((__format__ (__printf__, 4, 5)));
144
145 int ul_path_readf_cpulist(struct path_cxt *pc, cpu_set_t **set, int maxcpus, const char *path, ...)
146 __attribute__ ((__format__ (__printf__, 4, 5)));
147 #endif /* HAVE_CPU_SET_T */
148 #endif /* UTIL_LINUX_PATH_H */