1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
6 */
7 #ifndef INCLUDE_posix_h__
8 #define INCLUDE_posix_h__
9
10 #include "common.h"
11
12 #include <fcntl.h>
13 #include <time.h>
14
15 /* stat: file mode type testing macros */
16 #ifndef S_IFGITLINK
17 #define S_IFGITLINK 0160000
18 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
19 #endif
20
21 #ifndef S_IFLNK
22 #define S_IFLNK 0120000
23 #undef _S_IFLNK
24 #define _S_IFLNK S_IFLNK
25 #endif
26
27 #ifndef S_IWUSR
28 #define S_IWUSR 00200
29 #endif
30
31 #ifndef S_IXUSR
32 #define S_IXUSR 00100
33 #endif
34
35 #ifndef S_ISLNK
36 #define S_ISLNK(m) (((m) & _S_IFMT) == _S_IFLNK)
37 #endif
38
39 #ifndef S_ISDIR
40 #define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR)
41 #endif
42
43 #ifndef S_ISREG
44 #define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
45 #endif
46
47 #ifndef S_ISFIFO
48 #define S_ISFIFO(m) (((m) & _S_IFMT) == _S_IFIFO)
49 #endif
50
51 /* if S_ISGID is not defined, then don't try to set it */
52 #ifndef S_ISGID
53 #define S_ISGID 0
54 #endif
55
56 #ifndef O_BINARY
57 #define O_BINARY 0
58 #endif
59 #ifndef O_CLOEXEC
60 #define O_CLOEXEC 0
61 #endif
62 #ifndef SOCK_CLOEXEC
63 #define SOCK_CLOEXEC 0
64 #endif
65
66 /* access() mode parameter #defines */
67 #ifndef F_OK
68 #define F_OK 0 /* existence check */
69 #endif
70 #ifndef W_OK
71 #define W_OK 2 /* write mode check */
72 #endif
73 #ifndef R_OK
74 #define R_OK 4 /* read mode check */
75 #endif
76
77 /* Determine whether an errno value indicates that a read or write failed
78 * because the descriptor is blocked.
79 */
80 #if defined(EWOULDBLOCK)
81 #define GIT_ISBLOCKED(e) ((e) == EAGAIN || (e) == EWOULDBLOCK)
82 #else
83 #define GIT_ISBLOCKED(e) ((e) == EAGAIN)
84 #endif
85
86 /* define some standard errnos that the runtime may be missing. for example,
87 * mingw lacks EAFNOSUPPORT. */
88 #ifndef EAFNOSUPPORT
89 #define EAFNOSUPPORT (INT_MAX-1)
90 #endif
91
92 /* Provide a 64-bit size for offsets. */
93
94 #if defined(_MSC_VER)
95 typedef __int64 off64_t;
96 #elif defined(__HAIKU__)
97 typedef __haiku_std_int64 off64_t;
98 #elif defined(__APPLE__)
99 typedef __int64_t off64_t;
100 #else
101 typedef int64_t off64_t;
102 #endif
103
104 typedef int git_file;
105
106 /**
107 * Standard POSIX Methods
108 *
109 * All the methods starting with the `p_` prefix are
110 * direct ports of the standard POSIX methods.
111 *
112 * Some of the methods are slightly wrapped to provide
113 * saner defaults. Some of these methods are emulated
114 * in Windows platforms.
115 *
116 * Use your manpages to check the docs on these.
117 */
118
119 extern ssize_t p_read(git_file fd, void *buf, size_t cnt);
120 extern int p_write(git_file fd, const void *buf, size_t cnt);
121
122 #define p_close(fd) close(fd)
123 #define p_umask(m) umask(m)
124
125 extern int p_open(const char *path, int flags, ...);
126 extern int p_creat(const char *path, mode_t mode);
127 extern int p_getcwd(char *buffer_out, size_t size);
128 extern int p_rename(const char *from, const char *to);
129
130 extern int git__page_size(size_t *page_size);
131 extern int git__mmap_alignment(size_t *page_size);
132
133 /* The number of times `p_fsync` has been called. Note that this is for
134 * test code only; it it not necessarily thread-safe and should not be
135 * relied upon in production.
136 */
137 extern size_t p_fsync__cnt;
138
139 /**
140 * Platform-dependent methods
141 */
142 #ifdef GIT_WIN32
143 # include "win32/posix.h"
144 #else
145 # include "unix/posix.h"
146 #endif
147
148 #include "strnlen.h"
149
150 #ifdef NO_READDIR_R
p_readdir_r(DIR * dirp,struct dirent * entry,struct dirent ** result)151 GIT_INLINE(int) p_readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
152 {
153 GIT_UNUSED(entry);
154 *result = readdir(dirp);
155 return 0;
156 }
157 #else /* NO_READDIR_R */
158 # define p_readdir_r(d,e,r) readdir_r(d,e,r)
159 #endif
160
161 #ifdef NO_ADDRINFO
162 # include <netdb.h>
163 struct addrinfo {
164 struct hostent *ai_hostent;
165 struct servent *ai_servent;
166 struct sockaddr_in ai_addr_in;
167 struct sockaddr *ai_addr;
168 size_t ai_addrlen;
169 int ai_family;
170 int ai_socktype;
171 int ai_protocol;
172 long ai_port;
173 struct addrinfo *ai_next;
174 };
175
176 extern int p_getaddrinfo(const char *host, const char *port,
177 struct addrinfo *hints, struct addrinfo **info);
178 extern void p_freeaddrinfo(struct addrinfo *info);
179 extern const char *p_gai_strerror(int ret);
180 #else
181 # define p_getaddrinfo(a, b, c, d) getaddrinfo(a, b, c, d)
182 # define p_freeaddrinfo(a) freeaddrinfo(a)
183 # define p_gai_strerror(c) gai_strerror(c)
184 #endif /* NO_ADDRINFO */
185
186 #endif
187