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
|
/* Reentrant versions of execution system calls. These
implementations just call the usual system calls. */
#include <reent.h>
#include <unistd.h>
#include <sys/wait.h>
#include <_syslist.h>
/* Some targets provides their own versions of these functions. Those
targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
#ifdef _REENT_ONLY
#ifndef REENTRANT_SYSCALLS_PROVIDED
#define REENTRANT_SYSCALLS_PROVIDED
#endif
#endif
/* If NO_EXEC is defined, we don't need these functions. */
#if defined (REENTRANT_SYSCALLS_PROVIDED) || defined (NO_EXEC)
int _dummy_exec_syscalls = 1;
#else
/* We use the errno variable used by the system dependent layer. */
#undef errno
extern int errno;
/*
FUNCTION
<<_execve_r>>---Reentrant version of execve
INDEX
_execve_r
SYNOPSIS
#include <reent.h>
int _execve_r(struct _reent *<[ptr]>, const char *<[name]>,
char *const <[argv]>[], char *const <[env]>[]);
DESCRIPTION
This is a reentrant version of <<execve>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
int
_execve_r (struct _reent *ptr,
const char *name,
char *const argv[],
char *const env[])
{
int ret;
errno = 0;
if ((ret = _execve (name, argv, env)) == -1 && errno != 0)
_REENT_ERRNO(ptr) = errno;
return ret;
}
/*
NEWPAGE
FUNCTION
<<_fork_r>>---Reentrant version of fork
INDEX
_fork_r
SYNOPSIS
#include <reent.h>
int _fork_r(struct _reent *<[ptr]>);
DESCRIPTION
This is a reentrant version of <<fork>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
#ifndef NO_FORK
int
_fork_r (struct _reent *ptr)
{
int ret;
errno = 0;
if ((ret = _fork ()) == -1 && errno != 0)
_REENT_ERRNO(ptr) = errno;
return ret;
}
#endif
/*
NEWPAGE
FUNCTION
<<_wait_r>>---Reentrant version of wait
INDEX
_wait_r
SYNOPSIS
#include <reent.h>
int _wait_r(struct _reent *<[ptr]>, int *<[status]>);
DESCRIPTION
This is a reentrant version of <<wait>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
int
_wait_r (struct _reent *ptr,
int *status)
{
int ret;
errno = 0;
if ((ret = _wait (status)) == -1 && errno != 0)
_REENT_ERRNO(ptr) = errno;
return ret;
}
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
|
