projects / unix-history / blame
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|---|---|---|
| 3ebb09da KM |
1 | .\" Copyright (c) 1980 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 5 | .\" @(#)setpgid.2 4.1 (Berkeley) %G% | |
| 6 | .\" | |
| 7 | .TH SETPGRP 2J | |
| 8 | .UC 4 | |
| 9 | .SH NAME | |
| 10 | setpgrp, getpgrp \- set/get process group | |
| 11 | .SH SYNOPSIS | |
| 12 | .B int getpgrp(pid) | |
| 13 | .PP | |
| 14 | .B setpgrp(pid, pgrp) | |
| 15 | .PP | |
| 16 | .B cc ... \-ljobs | |
| 17 | .SH DESCRIPTION | |
| 18 | The process group of the specified process is returned by | |
| 19 | .I getpgrp. | |
| 20 | .I Setpgrp | |
| 21 | sets the process group of the specified process | |
| 22 | .I pid | |
| 23 | to the specified | |
| 24 | .I pgrp. | |
| 25 | If | |
| 26 | .I pid | |
| 27 | is zero, then the call applies to the current process. | |
| 28 | .PP | |
| 29 | If the invoker is not the super-user, then the affected process | |
| 30 | must have the same effective user-id as the invoker or be a descendant | |
| 31 | of the invoking process. | |
| 32 | .PP | |
| 33 | This call is used by | |
| 34 | .IR csh (1) | |
| 35 | to create | |
| 36 | process groups | |
| 37 | in implementing job control. | |
| 38 | The TIOCGPGRP and TIOCSPGRP calls | |
| 39 | described in | |
| 40 | .IR tty (4) | |
| 41 | are used to get/set the process group of the control terminal. | |
| 42 | .PP | |
| 43 | See | |
| 44 | .IR jobs(3) | |
| 45 | for a general discussion of job control. | |
| 46 | .SH "SEE ALSO" | |
| 47 | jobs(3), getuid(2), tty(4) | |
| 48 | .SH BUGS | |
| 49 | The job control facilities are not available in standard version 7 UNIX. | |
| 50 | These facilities are still under development and may change in future | |
| 51 | releases of the system as better inter-process communication facilities | |
| 52 | and support for virtual terminals become available. The options and | |
| 53 | specifications of these system calls and even the calls themselves | |
| 54 | are thus subject to change. | |
| 55 | .PP | |
| 56 | A system call | |
| 57 | .I setpgrp | |
| 58 | has been implemented in other versions of UNIX which are not widely | |
| 59 | used outside of Bell Laboratories; these implementations | |
| 60 | have, in general, slightly different semantics. |