usr/man/cat2/getpgrp.0



GETPGRP(2)          UNIX Programmer's Manual           GETPGRP(2)


N\bNA\bAM\bME\bE
     getpgrp - get process group

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     p\bpg\bgr\brp\bp =\b= g\bge\bet\btp\bpg\bgr\brp\bp(\b(p\bpi\bid\bd)\b)
     i\bin\bnt\bt p\bpg\bgr\brp\bp;\b;
     i\bin\bnt\bt p\bpi\bid\bd;\b;

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     The process group of the specified process is returned by
     _\bg_\be_\bt_\bp_\bg_\br_\bp. If _\bp_\bi_\bd is zero, then 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 fore-
     ground and may read, while others will block with a signal
     if they attempt to read.

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

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     setpgrp(2), getuid(2), tty(4)


Printed 7/9/88           August 26, 1985                        1