66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* unistd.h: POSIX constants and functions. */
|
|
|
|
#ifndef _UNISTD_H
|
|
#define _UNISTD_H
|
|
|
|
#define __need_NULL
|
|
#include <stddef.h>
|
|
|
|
#include <bits/seek.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
|
|
#define STDIN_FILENO 0
|
|
#define STDOUT_FILENO 1
|
|
#define STDERR_FILENO 2
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/* Create a new process that is a clone of the current one. */
|
|
pid_t fork(void);
|
|
|
|
/* Return the current process' process ID. */
|
|
pid_t getpid(void);
|
|
|
|
/* Return the current process' parent process ID. */
|
|
pid_t getppid(void);
|
|
|
|
/* Replace the current process with another one. On success, does not return. */
|
|
int execv(const char* path, char* const* argv);
|
|
|
|
int execve(const char*, char* const*, char* const*);
|
|
int execvp(const char*, char* const*);
|
|
|
|
/* Call the operating system kernel for a specific service. */
|
|
long syscall(long num, ...);
|
|
|
|
/* Sleep for X microseconds. */
|
|
int usleep(useconds_t us);
|
|
|
|
/* Sleep for X seconds. */
|
|
unsigned long sleep(unsigned long seconds);
|
|
|
|
/* Close a file descriptor. */
|
|
int close(int fd);
|
|
|
|
/* Read bytes from a file descriptor. */
|
|
ssize_t read(int fd, void* buf, size_t size);
|
|
|
|
/* Write bytes to a file descriptor. */
|
|
ssize_t write(int fd, const void* buf, size_t size);
|
|
|
|
/* Modify a file descriptor's offset. */
|
|
off_t lseek(int fd, off_t offset, int whence);
|
|
|
|
/* Duplicate a file descriptor. */
|
|
int dup(int fd);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|