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| 4 | GETPGRP(2) UNIX Programmer's Manual GETPGRP(2) | |
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| 8 | N\bNA\bAM\bME\bE | |
| 9 | getpgrp - get process group | |
| 10 | ||
| 11 | S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS | |
| 12 | p\bpg\bgr\brp\bp =\b= g\bge\bet\btp\bpg\bgr\brp\bp(\b(p\bpi\bid\bd)\b) | |
| 13 | i\bin\bnt\bt p\bpg\bgr\brp\bp;\b; | |
| 14 | i\bin\bnt\bt p\bpi\bid\bd;\b; | |
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| 16 | D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN | |
| 17 | The process group of the specified process is returned by | |
| 18 | _\bg_\be_\bt_\bp_\bg_\br_\bp. If _\bp_\bi_\bd is zero, then the call applies to the | |
| 19 | current process. | |
| 20 | ||
| 21 | Process groups are used for distribution of signals, and by | |
| 22 | terminals to arbitrate requests for their input: processes | |
| 23 | that have the same process group as the terminal are fore- | |
| 24 | ground and may read, while others will block with a signal | |
| 25 | if they attempt to read. | |
| 26 | ||
| 27 | This call is thus used by programs such as _\bc_\bs_\bh(1) to create | |
| 28 | process groups in implementing job control. The TIOCGPGRP | |
| 29 | and TIOCSPGRP calls described in _\bt_\bt_\by(4) are used to get/set | |
| 30 | the process group of the control terminal. | |
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| 32 | S\bSE\bEE\bE A\bAL\bLS\bSO\bO | |
| 33 | setpgrp(2), getuid(2), tty(4) | |
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| 63 | Printed 7/9/88 August 26, 1985 1 | |
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