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<html><!-- This HTML file has been created by texi2html 1.29
from syscalls.texi on 4 June 1994 -->
<TITLE>Syscall specifications of Linux - fork</TITLE>
<P>Go to the <A HREF="syscalls_58.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_58.html">previous</A>, <A HREF="syscalls_60.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_60.html">next</A> section.<P>
<H2><A NAME="SEC59" HREF="syscalls_toc.html#SEC59" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_toc.html#SEC59">template</A></H2>
<P>
<H3>SYNOPSIS</H3>
<P>
<CODE>pid_t fork(void);</CODE>
<P>
<CODE>pid_t vfork(void);</CODE>
<P>
<H3>DESCRIPTION</H3>
<P>
Create a child task from the current task. The new task is an exact copy
of the parent appart from the PID. <CODE>vfork</CODE> is simply an alias for
<CODE>fork</CODE>.
<P>
<H3>RETURN VALUE</H3>
<P>
On success, the call returns the PID of the new task in the parent and
returns 1 in the child. On error, returns -1 and sets <CODE>errno</CODE> to the
following value: <CODE>EAGAIN</CODE> meaning that there is not enough memory
to complete the call.
<P>
<P>Go to the <A HREF="syscalls_58.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_58.html">previous</A>, <A HREF="syscalls_60.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_60.html">next</A> section.<P>