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getpgrp.0
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GETPGRP(2) UNIX Programmer's Manual GETPGRP(2)
NNAAMMEE
ggeettppggrrpp - get process group
SSYYNNOOPPSSIISS
_p_i_d___t
ggeettppggrrpp(_i_n_t _p_i_d)
DDEESSCCRRIIPPTTIIOONN
The process group of the specified process is returned by ggeettppggrrpp(). If
_p_i_d 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 con
trol terminal.
SSEEEE AALLSSOO
setpgrp(2), getuid(2), termios(4)
HHIISSTTOORRYY
The ggeettppggrrpp function call appeared in 4.0BSD.
4.2 Berkeley Distribution March 10, 1991 1