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<a name='TOP'><h2><a href='../mains.html'>root</a>/<a href='../files/108.html'>lib</a>/wait.c</h2>
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<h2>DEFINITIONS</h2>
This source file includes following definitions.
<ol>
<li><a href='#L17' title='Defined at 17.'>_syscall3</a>
</ol>
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<pre>
<a name='L1'><i><font color='green'>/*</font></i>
<a name='L2'><i><font color='green'>* linux/lib/wait.c</font></i>
<a name='L3'><i><font color='green'>*</font></i>
<a name='L4'><i><font color='green'>* (C) 1991 Linus Torvalds</font></i>
<a name='L5'><i><font color='green'>*/</font></i>
<a name='L6'>
<a name='L7'><font color='darkred'>#define</font> <a href='../S/50.html#L71' title='Refered from 71 in include/unistd.h.'>__LIBRARY__</a>
<a name='L8'><font color='darkred'>#include</font> <<a href='50.html'>unistd.h</a>> <i><font color='green'>// Linux 标准头文件。定义了各种符号常数和类型，并申明了各种函数。</font></i>
<a name='L9'><i><font color='green'>// 如定义了__LIBRARY__，则还包括系统调用号和内嵌汇编_syscall0()等。</font></i>
<a name='L10'><font color='darkred'>#include</font> <<a href='47.html'>sys/wait.h</a>> <i><font color='green'>// 等待调用头文件。定义系统调用wait()和waitpid()及相关常数符号。</font></i>
<a name='L11'>
<a name='L12'><i><font color='green'>//// 等待进程终止系统调用函数。</font></i>
<a name='L13'><i><font color='green'>// 该下面宏结构对应于函数：pid_t waitpid(pid_t pid, int * wait_stat, int options)</font></i>
<a name='L14'><i><font color='green'>//</font></i>
<a name='L15'><i><font color='green'>// 参数：pid - 等待被终止进程的进程id，或者是用于指定特殊情况的其它特定数值；</font></i>
<a name='L16'><i><font color='green'>// wait_stat - 用于存放状态信息；options - WNOHANG 或WUNTRACED 或是0。</font></i>
<a name='L17'><a href='../R/380.html' title='Multiple refered from 2 places.'>_syscall3</a> (<a href='../S/45.html#L23' title='Defined at 23 in include/sys/types.h.'>pid_t</a>, waitpid, <a href='../S/45.html#L23' title='Defined at 23 in include/sys/types.h.'>pid_t</a>, pid, <b>int</b> *, wait_stat, <b>int</b>, options)
<a name='L18'><i><font color='green'>//// wait()系统调用。直接调用waitpid()函数。</font></i>
<a name='L19'> <a href='../S/45.html#L23' title='Defined at 23 in include/sys/types.h.'>pid_t</a> wait (<b>int</b> *wait_stat)
<a name='L20'><font color='red'>{</font>
<a name='L21'> <b>return</b> waitpid (-1, wait_stat, 0);
<a name='L22'><font color='red'>}</font>
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