mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-08 20:55:01 +00:00
66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/* Reentrant versions of open system call. */
|
|
|
|
#include <reent.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <_syslist.h>
|
|
|
|
/* Some targets provides their own versions of this functions. Those
|
|
targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
|
|
|
|
#ifdef _REENT_ONLY
|
|
#ifndef REENTRANT_SYSCALLS_PROVIDED
|
|
#define REENTRANT_SYSCALLS_PROVIDED
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef REENTRANT_SYSCALLS_PROVIDED
|
|
|
|
/* We use the errno variable used by the system dependent layer. */
|
|
#undef errno
|
|
extern int errno;
|
|
|
|
/*
|
|
FUNCTION
|
|
<<_open_r>>---Reentrant version of open
|
|
|
|
INDEX
|
|
_open_r
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <reent.h>
|
|
int _open_r(struct _reent *<[ptr]>,
|
|
const char *<[file]>, int <[flags]>, int <[mode]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <reent.h>
|
|
int _open_r(<[ptr]>, <[file]>, <[flags]>, <[mode]>)
|
|
struct _reent *<[ptr]>;
|
|
char *<[file]>;
|
|
int <[flags]>;
|
|
int <[mode]>;
|
|
|
|
DESCRIPTION
|
|
This is a reentrant version of <<open>>. It
|
|
takes a pointer to the global data block, which holds
|
|
<<errno>>.
|
|
*/
|
|
|
|
int
|
|
_DEFUN (_open_r, (ptr, file, flags, mode),
|
|
struct _reent *ptr _AND
|
|
_CONST char *file _AND
|
|
int flags _AND
|
|
int mode)
|
|
{
|
|
int ret;
|
|
|
|
errno = 0;
|
|
if ((ret = _open (file, flags, mode)) == -1 && errno != 0)
|
|
ptr->_errno = errno;
|
|
return ret;
|
|
}
|
|
|
|
|
|
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
|