setpgrp() set process group ID to process ID	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

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SYNOPSIS

#include <sys/types.h>

#include <unistd.h>

pid_t setpgrp(void);

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DESCRIPTION

If the process is not already a session leader, setpgrp() sets the process group ID of the calling process to the process ID of the calling process. If setpgrp() creates a new session, the new session has no controlling terminal.

The setpgrp() function has no affect when the calling process is a session group leader.

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PARAMETERS

None.

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RETURN VALUES

The setpgrp() function returns the value of the new process group ID.

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CONFORMANCE

POSIX.1 (1996)

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MULTITHREAD SAFETY LEVEL

MT-Safe.

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PORTING ISSUES

In Win32, detaching from controlling terminal means the following:

• If there are no other processes using the console window (for example, an invoking shell, or a previously-invoked child), the console window is closed.
• Any children created after the call to setpgrp() is created without a console window attached.

The returned process group ID is the Win32 process ID of the process group leader. Refer to Windows Concepts in the MKS Toolkit UNIX to Windows Porting Guide for more information about process IDs.

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AVAILABILITY

MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition

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SEE ALSO

Functions:

execl(), execle(), execlp(), execv(), execve(), execvp(), fork(), getpgid(), getpid(), getsid(), setpgid(), setsid(), tcsetpgrp()

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MKS Toolkit 9.2 Documentation Build 16.