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/* Reentrant versions of fcntl system call. This implementation just
calls the fcntl system call. */
#include <reent.h>
#include <fcntl.h>
#include <sys/stat.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
#ifndef REENTRANT_SYSCALLS_PROVIDED
/* We use the errno variable used by the system dependent layer. */
#undef errno
extern int errno;
/*
FUNCTION
<<_fcntl_r>>---Reentrant version of fcntl
INDEX
_fcntl_r
ANSI_SYNOPSIS
#include <reent.h>
int _fcntl_r(struct _reent *<[ptr]>,
int <[fd]>, int <[cmd]>, <[arg]>);
TRAD_SYNOPSIS
#include <reent.h>
int _fcntl_r(<[ptr]>, <[fd]>, <[cmd]>, <[arg]>)
struct _reent *<[ptr]>;
int <[fd]>;
int <[cmd]>;
int <[arg]>;
DESCRIPTION
This is a reentrant version of <<fcntl>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
int
_fcntl_r (ptr, fd, cmd, arg)
struct _reent *ptr;
int fd;
int cmd;
int arg;
{
int ret;
errno = 0;
if ((ret = _fcntl (fd, cmd, arg)) == -1 && errno != 0)
ptr->_errno = errno;
return ret;
}
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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