1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// Workarounds for horrible build environment idiosyncrasies.
// Instead of polluting the code with strange #ifdefs to work around bugs
// in specific compiler, library, or OS versions, localize all that here
// and in portability.c
// The tendency of gcc to produce stupid warnings continues with
// warn_unused_result, which warns about things like ignoring the return code
// of nice(2) (which is completely useless since -1 is a legitimate return
// value on success and even the man page tells you to use errno instead).
// This makes it stop.
#undef _FORTIFY_SOURCE
// Always use long file support.
#define _FILE_OFFSET_BITS 64
// This isn't in the spec, but it's how we determine what we're using.
#include <features.h>
#ifndef O_DIRECTORY
#define O_DIRECTORY 0200000
#endif
#if defined(__GLIBC__)
// "Function prototypes shall be provided." but aren't.
// http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html
char *crypt(const char *key, const char *salt);
// An SUSv4 function that glibc refuses to #define without crazy #defines,
// see http://pubs.opengroup.org/onlinepubs/9699919799/functions/strptime.html
#include <time.h>
char *strptime(const char *buf, const char *format, struct tm *tm);
// uClibc pretends to be glibc and copied a lot of its bugs, but has a few more
#if defined(__UCLIBC__)
#include <unistd.h>
#include <stdio.h>
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 00400000 /* don't follow links */
#endif
// When building under obsolete glibc, hold its hand a bit.
#elif __GLIBC_MINOR__ < 10
#define AT_FDCWD -100
#define AT_SYMLINK_NOFOLLOW 0x100
#define AT_REMOVEDIR 0x200
#define fstatat fstatat64
int fstatat64(int dirfd, const char *pathname, void *buf, int flags);
int readlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz);
char *stpcpy(char *dest, const char *src);
#include <sys/stat.h>
int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags);
int openat(int dirfd, const char *pathname, int flags, ...);
#include <dirent.h>
DIR *fdopendir(int fd);
#include <unistd.h>
int fchownat(int dirfd, const char *pathname,
uid_t owner, gid_t group, int flags);
int isblank(int c);
int unlinkat(int dirfd, const char *pathname, int flags);
#include <stdio.h>
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
#endif
#endif
#ifdef __GNUC__
#define noreturn __attribute__((noreturn))
#else
#define noreturn
#endif
#ifndef __APPLE__
#include <byteswap.h>
#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define IS_BIG_ENDIAN 1
#else
#define IS_BIG_ENDIAN 0
#endif
int clearenv(void);
#else
#ifdef __BIG_ENDIAN__
#define IS_BIG_ENDIAN 1
#else
#define IS_BIG_ENDIAN 0
#endif
#endif
#if IS_BIG_ENDIAN
#define IS_LITTLE_ENDIAN 0
#define SWAP_BE16(x) (x)
#define SWAP_BE32(x) (x)
#define SWAP_BE64(x) (x)
#define SWAP_LE16(x) bswap_16(x)
#define SWAP_LE32(x) bswap_32(x)
#define SWAP_LE64(x) bswap_64(x)
#else
#define IS_LITTLE_ENDIAN 1
#define SWAP_BE16(x) bswap_16(x)
#define SWAP_BE32(x) bswap_32(x)
#define SWAP_BE64(x) bswap_64(x)
#define SWAP_LE16(x) (x)
#define SWAP_LE32(x) (x)
#define SWAP_LE64(x) (x)
#endif
// Some versions of gcc produce spurious "may be uninitialized" warnings in
// cases where it provably can't happen. Unfortunately, although this warning
// is calculated and produced separately from the "is definitely used
// uninitialized" warnings, there's no way to turn off the broken spurious "may
// be" warnings without also turning off the non-broken "is" warnings.
#if CFG_TOYBOX_DEBUG
#define GCC_BUG =0
#else
#define GCC_BUG
#endif
#if defined(__APPLE__) || defined(__ANDROID__)
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
ssize_t getline(char **lineptr, size_t *n, FILE *stream);
#endif
|
