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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>sched_getparam</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_008_189"> </a>NAME</h4><blockquote>sched_getparam - get scheduling parameters(<b>REALTIME</b>)</blockquote><h4><a name = "tag_000_008_190"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="sched.h.html">sched.h</a>>int sched_getparam(pid_t <i>pid</i>, struct sched_param *<i>param</i>);</code></pre></blockquote><h4><a name = "tag_000_008_191"> </a>DESCRIPTION</h4><blockquote>The<i>sched_getparam()</i>function returns the scheduling parameters of a process specified by<i>pid</i>in the<b>sched_param</b>structure pointed to by<i>param</i>.<p>If a process specified by<i>pid</i>exists and if the calling process has permission,the scheduling parameters for the process whose process ID is equal to<i>pid</i>will be returned.<p>If<i>pid</i>is zero, the scheduling parameters for the calling process will be returned.The behaviour of the<i>sched_getparam()</i>function is unspecified if the value of<i>pid</i>is negative.</blockquote><h4><a name = "tag_000_008_192"> </a>RETURN VALUE</h4><blockquote>Upon successful completion, the<i>sched_getparam()</i>function returns zero.If the call to<i>sched_getparam()</i>is unsuccessful, the function returns a value of -1 and sets<i>errno</i>to indicate the error.</blockquote><h4><a name = "tag_000_008_193"> </a>ERRORS</h4><blockquote>The <i>sched_getparam()</i>function will fail if:<dl compact><dt>[ENOSYS]<dd>The function<i>sched_getparam()</i>is not supported by this implementation.<dt>[EPERM]<dd>The requesting process does not have permissionto obtain the scheduling parameters of the specified process.<dt>[ESRCH]<dd>No process can be found corresponding to that specified by<i>pid</i>.</dl></blockquote><h4><a name = "tag_000_008_194"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_195"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_196"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_197"> </a>SEE ALSO</h4><blockquote><i><a href="sched_getscheduler.html">sched_getscheduler()</a></i>,<i><a href="sched_setparam.html">sched_setparam()</a></i>,<i><a href="sched_setscheduler.html">sched_setscheduler()</a></i>,<i><a href="sched.h.html"><sched.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from the POSIX Realtime Extension (1003.1b-1993/1003.1i-1995)</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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