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posix_setpgid — Sets the process group ID for a process (POSIX.1, 4.3.3)


int posix_setpgid(pid, pgid);
int pid: Process ID of process to change
int pgid: Process group to change pid to


0 on success and FALSE on failure.


This function sets the process group ID for the process given by pid to the value given by pgid . The calling process must have adequate permissions to perform this operation.

If pid is 0, then the call will attempt to set the process group ID for the current process.

If pgid is 0, then the call will use the process ID of the process identified by pid .

A process may only be moved between process groups which are in the same session.


PHP 3.0.13+, PHP 4.0b4+


Example 1087. Setting the process group ID

if (FALSE === posix_setpgid(3805, 1001)) {
    echo "Could not set new process group ID.\n";
} else {
    echo "Process group ID successfully changed.\n";

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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