GETPGRP(2)                386BSD Programmer's Manual                GETPGRP(2)

NAME
     getpgrp - get process group

SYNOPSIS
     pid_t
     getpgrp(int pid)

DESCRIPTION
     The process group of the specified process is returned by getpgrp().  If
     pid is zero, the call applies to the current process.

     Process groups are used for distribution of signals, and by terminals to
     arbitrate requests for their input: processes that have the same process
     group as the terminal are foreground and may read, while others will
     block with a signal if they attempt to read.

     This call is thus used by programs such as csh(1) to create process
     groups in implementing job control.  The TIOCGPGRP and TIOCSPGRP calls
     described in termios(4) are used to get/set the process group of the
     control terminal.

SEE ALSO
     setpgrp(2),  getuid(2),  termios(4)

HISTORY
     The getpgrp function call appeared in 4.0BSD.

4.2 Berkeley Distribution       March 10, 1991                               1