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17<title>Debugging with GDB: write</title>
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64<a name="write"></a>
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70<a name="write-1"></a>
71<h4 class="unnumberedsubsubsec">write</h4>
72<a name="index-write_002c-file_002di_002fo-system-call"></a>
73
74<dl compact="compact">
75<dt>Synopsis:</dt>
76<dd><div class="smallexample">
77<pre class="smallexample">int write(int fd, const void *buf, unsigned int count);
78</pre></div>
79
80</dd>
81<dt>Request:</dt>
82<dd><p>&lsquo;<samp>Fwrite,<var>fd</var>,<var>bufptr</var>,<var>count</var></samp>&rsquo;
83</p>
84</dd>
85<dt>Return value:</dt>
86<dd><p>On success, the number of bytes written are returned.
87Zero indicates nothing was written.  On error, -1
88is returned.
89</p>
90</dd>
91<dt>Errors:</dt>
92<dd>
93<dl compact="compact">
94<dt><code>EBADF</code></dt>
95<dd><p><var>fd</var> is not a valid file descriptor or is not open for
96writing.
97</p>
98</dd>
99<dt><code>EFAULT</code></dt>
100<dd><p><var>bufptr</var> is an invalid pointer value.
101</p>
102</dd>
103<dt><code>EFBIG</code></dt>
104<dd><p>An attempt was made to write a file that exceeds the
105host-specific maximum file size allowed.
106</p>
107</dd>
108<dt><code>ENOSPC</code></dt>
109<dd><p>No space on device to write the data.
110</p>
111</dd>
112<dt><code>EINTR</code></dt>
113<dd><p>The call was interrupted by the user.
114</p></dd>
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