uclibc-ng/include/unistd.h

/* unistd.h <ndf@linux.mit.edu> */
#include <features.h>
#include <sys/types.h>

#ifndef __UNISTD_H
#define __UNISTD_H

#include <errno.h>
#include <asm/unistd.h>

#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2



extern int close __P ((int));
extern size_t read __P ((int __fd, char * __buf, size_t __nbytes));
extern size_t write __P ((int __fd, __const char * __buf, size_t __n));
extern off_t lseek __P ((int __fd, off_t __n, int __whence));
extern int pipe __P ((int __pipedes[2]));
extern unsigned int alarm __P ((unsigned int __seconds));
extern int sleep __P ((unsigned int __seconds));
extern void usleep __P ((unsigned long __microseconds));
extern int pause __P ((void));
extern char*    crypt __P((__const char *__key, __const char *__salt));
extern int isatty __P ((int __fd));
extern int readlink __P ((__const char *__path, char *__buf, size_t __len));
extern int link __P ((__const char *__from, __const char *__to));
extern int symlink __P ((__const char *__from, __const char *__to));
extern int readlink __P ((__const char *__path, char *__buf, size_t __len));
extern int unlink __P ((__const char *__name));
extern char *getcwd __P ((char *__buf, size_t __size));
extern int fchdir __P ((int __fd));
extern int chdir __P ((__const char *__path));
extern int chown __P ((__const char *__file,
                       uid_t __owner, gid_t __group));

extern int fchown __P ((int __fd,
                       uid_t __owner, gid_t __group));

extern int fsync __P ((int __fd));

extern int sync __P ((void));

extern int rmdir __P ((__const char *__path));

extern int rename __P((__const char* _old, __const char* _new));

extern int access __P ((__const char *__name, int __type));

extern int      reboot __P ((int __magic, int __magic_too, int __flag));

extern int mkstemp __P ((char * __template));
extern char * mktemp __P ((char * __template));

extern int _clone __P ((int (*fn)(void *arg), void *child_stack, int flags, void *arg));


#if 0                                                                         
#ifndef SYS_fork
#define SYS_fork 2
#endif

#define vfork() ({ \
register long __res __asm__ ("%d0"); \
__asm__ __volatile__ ("trap  #0" \
                      : "=g" (__res) \
                      : "0" (SYS_fork) \
                      : "%d0"); \
__res; \
})
#endif

#define vfork() ({						\
register unsigned long __res __asm__ ("%d0") = __NR_fork;	\
__asm__ __volatile__ ("trap  #0"				\
                      : "=g" (__res)				\
                      : "0" (__res)				\
                      : "%d0");					\
if (__res >= (unsigned long)-4096) {				\
	errno = -__res;						\
	__res = (pid_t)-1;					\
}								\
(pid_t)__res;							\
})


#define fork fork_not_available_use_vfork
#define clone clone_not_available_use__clone
		

#ifndef SEEK_SET
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif

#ifndef R_OK
#define	R_OK	4		/* Test for read permission.  */
#define	W_OK	2		/* Test for write permission.  */
#define	X_OK	1		/* Test for execute permission.  */
#define	F_OK	0		/* Test for existence.  */
#endif

#endif /* __UNISTD_H */