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<a name='TOP'><h2><a href='../mains.html'>root</a>/<a href='../files/108.html'>lib</a>/write.c</h2>
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<a name='L1'><i><font color='green'>/*</font></i>
<a name='L2'><i><font color='green'>* linux/lib/write.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'>
<a name='L11'><i><font color='green'>//// 写文件系统调用函数。</font></i>
<a name='L12'><i><font color='green'>// 该宏结构对应于函数：int write(int fd, const char * buf, off_t count)</font></i>
<a name='L13'><i><font color='green'>// 参数：fd - 文件描述符；buf - 写缓冲区指针；count - 写字节数。</font></i>
<a name='L14'><i><font color='green'>// 返回：成功时返回写入的字节数(0 表示写入0 字节)；出错时将返回-1，并且设置了出错号。</font></i>
<a name='L15'><a href='../D/702.html' title='Multiple defined in 2 places.'>_syscall3</a> (<b>int</b>, write, <b>int</b>, fd, <b>const</b> <b>char</b> *, buf, <a href='../S/45.html#L32' title='Defined at 32 in include/sys/types.h.'>off_t</a>, count)
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