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