POSIX Multi-Process option group. More...

Files
file	times.h
	POSIX process CPU time accounting (<sys/times.h>)

Functions
int	pthread_atfork (void(prepare)(void), void(parent)(void), void(*child)(void))
	Register fork handlers to be called around fork().

clock_t	times (struct tms *buf)
	Get the process and child process times.

FUNC_NORETURN void	_exit (int status)
	Terminate the calling process without calling atexit() handlers.

int	execl (const char path, const char arg0,...)
	Replace the process image with a new program (argument list form).

int	execle (const char path, const char arg0,...)
	Replace process image with a new program plus environment (argument list form).

int	execlp (const char file, const char arg0,...)
	Replace process image using PATH search (argument list form).

int	execv (const char path, char const argv[])
	Replace process image with a new program (vector form).

int	execve (const char path, char const argv[], char *const envp[])
	Replace process image with a new program plus environment (vector form).

int	execvp (const char file, char const argv[])
	Replace process image using PATH search (vector form).

int	fexecve (int fd, char const argv[], char const envp[])
	Replace process image using an open file descriptor (vector form).

pid_t	fork (void)
	Create a child process.

pid_t	getpgid (pid_t pid)
	Get the process group ID of a process.

pid_t	getpgrp (void)
	Get the process group ID of the calling process.

pid_t	getpid (void)
	Get the process ID of the calling process.

pid_t	getppid (void)
	Get the process ID of the parent of the calling process.

pid_t	getsid (pid_t pid)
	Get the session ID of a process.

pid_t	setsid (void)
	Create a new session and set the process group ID.

unsigned int	sleep (unsigned int seconds)
	Suspend execution for at least the specified number of seconds.

int	usleep (useconds_t useconds)
	Suspend execution for at least the specified number of microseconds (obsolescent).

Detailed Description

POSIX Multi-Process option group.

Covers fork(), exec*(), _exit(), getpid(), getppid(), getpgid(), setpgid(), setsid(), getsid(), sleep(), wait*(), and related process-control functions.

Function Documentation

◆ _exit()

FUNC_NORETURN void _exit ( int status )

Terminate the calling process without calling atexit() handlers.

◆ execl()

int execl	(	const char *	path,
		const char *	arg0,
			...
	)

✗

Replace the process image with a new program (argument list form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execl.html

◆ execle()

int execle	(	const char *	path,
		const char *	arg0,
			...
	)

✗

Replace process image with a new program plus environment (argument list form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execle.html

◆ execlp()

int execlp	(	const char *	file,
		const char *	arg0,
			...
	)

✗

Replace process image using PATH search (argument list form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execlp.html

◆ execv()

int execv	(	const char *	path,
		char *const	argv[]
	)

✗

Replace process image with a new program (vector form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execv.html

◆ execve()

int execve	(	const char *	path,
		char *const	argv[],
		char *const	envp[]
	)

✗

Replace process image with a new program plus environment (vector form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execve.html

◆ execvp()

int execvp	(	const char *	file,
		char *const	argv[]
	)

✗

Replace process image using PATH search (vector form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/execvp.html

◆ fexecve()

int fexecve	(	int	fd,
		char *const	argv[],
		char *const	envp[]
	)

Replace process image using an open file descriptor (vector form).

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fexecve.html

◆ fork()

pid_t fork ( void )

✗

Create a child process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fork.html

◆ getpgid()

pid_t getpgid ( pid_t pid )

✗

Get the process group ID of a process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpgid.html

◆ getpgrp()

pid_t getpgrp ( void )

✗

Get the process group ID of the calling process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpgrp.html

◆ getpid()

pid_t getpid ( void )

Get the process ID of the calling process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpid.html

◆ getppid()

pid_t getppid ( void )

✗

Get the process ID of the parent of the calling process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getppid.html

◆ getsid()

pid_t getsid ( pid_t pid )

✗

Get the session ID of a process.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsid.html

◆ pthread_atfork()

int pthread_atfork	(	void(*)(void)	prepare,
		void(*)(void)	parent,
		void(*)(void)	child
	)

Register fork handlers to be called around fork().

Parameters

prepare	Handler called in the parent before fork().
parent	Handler called in the parent after fork().
child	Handler called in the child after fork().

Returns: 0 on success, or a positive error number on failure.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_atfork.html

◆ setsid()

pid_t setsid ( void )

✗

Create a new session and set the process group ID.

See also: https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsid.html

◆ sleep()

unsigned int sleep ( unsigned int seconds )

Suspend execution for at least the specified number of seconds.

◆ times()

clock_t times ( struct tms * buf )

Get the process and child process times.