48 lines
1.9 KiB
HTML
48 lines
1.9 KiB
HTML
<html><!-- This HTML file has been created by texi2html 1.29
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from syscalls.texi on 4 June 1994 -->
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<TITLE>Syscall specifications of Linux - getpgrp</TITLE>
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<P>Go to the <A HREF="syscalls_61.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_61.html">previous</A>, <A HREF="syscalls_63.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_63.html">next</A> section.<P>
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<H2><A NAME="SEC62" HREF="syscalls_toc.html#SEC62" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_toc.html#SEC62">getpgrp, setpgid and setpgrp</A></H2>
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<P>
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<H3>SYNOPSIS</H3>
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<P>
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<CODE>pid_t getpgrp(void);</CODE>
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<P>
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<CODE>int setpgid(pid_t <VAR>pid</VAR>, pid_t <VAR>pgid</VAR>);</CODE>
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<P>
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<CODE>int setpgrp(void);</CODE>
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<P>
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<H3>PARAMETERS</H3>
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<P>
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<VAR>pid</VAR>: [in] the task to modify (0 for the current task).
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<P>
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<VAR>pgid</VAR>: [in] the new process group id. If zero is specified, the
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value of <VAR>pid</VAR> is taken.
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<P>
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<H3>DESCRIPTION</H3>
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<P>
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<CODE>getpgrp</CODE> returns the current process group. <CODE>setpgid</CODE> sets
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the process group id of the task specified by <VAR>pid</VAR> to <VAR>pgid</VAR>.
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<CODE>setpgrp</CODE> sets the group id of the current task to its process id.
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<P>
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Note: <CODE>setpgrp</CODE> is implemented as <CODE>setpgid(0,0)</CODE>.
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<P>
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<H3>RETURN VALUE</H3>
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<P>
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<VAR>getpgrp</VAR> allways succeed and returns the current process group id.
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<P>
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On success, <CODE>setpgrp</CODE> and <CODE>setgpid</CODE> return zero. On error,
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they return -1 and <CODE>errno</CODE> is set to one of the following values:
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<P>
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For <VAR>setpgid</VAR>:
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<P>
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<UL>
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<LI><CODE>EINVAL</CODE>: pgid is less than 0.
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<LI><CODE>ESRCH</CODE>.
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</UL>
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<P>
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For both calls: <CODE>EPERM</CODE>.
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<P>
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<P>Go to the <A HREF="syscalls_61.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_61.html">previous</A>, <A HREF="syscalls_63.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_63.html">next</A> section.<P>
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