newlib-cygwin/newlib/libc/reent/isattyr.c

64 lines
1.2 KiB
C

/* Reentrant versions of isatty system call. */
#include <reent.h>
#include <unistd.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
#ifdef REENTRANT_SYSCALLS_PROVIDED
int _dummy_isatty_syscalls = 1;
#else
/* We use the errno variable used by the system dependent layer. */
#undef errno
extern int errno;
/*
FUNCTION
<<_isatty_r>>---Reentrant version of isatty
INDEX
_isatty_r
ANSI_SYNOPSIS
#include <reent.h>
int _isatty_r(struct _reent *<[ptr]>,
int <[fd]>);
TRAD_SYNOPSIS
#include <reent.h>
int _isatty_r(<[ptr]>, <[fd]>)
struct _reent *<[ptr]>;
int <[fd]>;
DESCRIPTION
This is a reentrant version of <<isatty>>. It
takes a pointer to the global data block, which holds
<<errno>>.
*/
int
_isatty_r (ptr, fd)
struct _reent *ptr;
int fd;
{
int ret;
errno = 0;
if ((ret = _isatty (fd)) == -1 && errno != 0)
ptr->_errno = errno;
return ret;
}
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */