/*
 * unistd.h — POSIX system call wrappers for nulsl-libc.
 *
 * These are thin, real wrappers around the raw syscall() interface — see
 * docs/syscalls.md. The kernel is the API; everything else is sugar.
 */

#ifndef _NULSL_UNISTD_H
#define _NULSL_UNISTD_H

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

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

/* Real syscall wrappers. */
ssize_t read(int fd, void *buf, size_t count);
ssize_t write(int fd, const void *buf, size_t count);
int close(int fd);
pid_t getpid(void);
void _exit(int status) __attribute__((noreturn));

/* Stub. */
int unlink(const char *path);

/* Raw syscall entry point (also available here for convenience). */
long syscall(long number, ...);

#ifdef __cplusplus
}
#endif

#endif /* _NULSL_UNISTD_H */