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136 lines
4.5 KiB
HTML
136 lines
4.5 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>lseek (Debugging with GDB)</title>
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<meta name="description" content="lseek (Debugging with GDB)">
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<meta name="keywords" content="lseek (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="List-of-Supported-Calls.html#List-of-Supported-Calls" rel="up" title="List of Supported Calls">
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<link href="rename.html#rename" rel="next" title="rename">
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<link href="write.html#write" rel="prev" title="write">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="lseek"></a>
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<div class="header">
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<p>
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Next: <a href="rename.html#rename" accesskey="n" rel="next">rename</a>, Previous: <a href="write.html#write" accesskey="p" rel="prev">write</a>, Up: <a href="List-of-Supported-Calls.html#List-of-Supported-Calls" accesskey="u" rel="up">List of Supported Calls</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="lseek-1"></a>
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<h4 class="unnumberedsubsubsec">lseek</h4>
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<a name="index-lseek_002c-file_002di_002fo-system-call"></a>
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<dl compact="compact">
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<dt>Synopsis:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">long lseek (int fd, long offset, int flag);
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</pre></div>
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</dd>
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<dt>Request:</dt>
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<dd><p>‘<samp>Flseek,<var>fd</var>,<var>offset</var>,<var>flag</var></samp>’
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</p>
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<p><var>flag</var> is one of:
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</p>
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<dl compact="compact">
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<dt><code>SEEK_SET</code></dt>
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<dd><p>The offset is set to <var>offset</var> bytes.
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</p>
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</dd>
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<dt><code>SEEK_CUR</code></dt>
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<dd><p>The offset is set to its current location plus <var>offset</var>
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bytes.
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</p>
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</dd>
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<dt><code>SEEK_END</code></dt>
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<dd><p>The offset is set to the size of the file plus <var>offset</var>
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bytes.
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</p></dd>
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</dl>
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</dd>
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<dt>Return value:</dt>
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<dd><p>On success, the resulting unsigned offset in bytes from
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the beginning of the file is returned. Otherwise, a
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value of -1 is returned.
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</p>
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</dd>
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<dt>Errors:</dt>
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<dd>
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<dl compact="compact">
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<dt><code>EBADF</code></dt>
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<dd><p><var>fd</var> is not a valid open file descriptor.
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</p>
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</dd>
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<dt><code>ESPIPE</code></dt>
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<dd><p><var>fd</var> is associated with the <small>GDB</small> console.
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</p>
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</dd>
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<dt><code>EINVAL</code></dt>
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<dd><p><var>flag</var> is not a proper value.
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</p>
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</dd>
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<dt><code>EINTR</code></dt>
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<dd><p>The call was interrupted by the user.
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</p></dd>
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</dl>
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</dd>
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</dl>
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</body>
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</html>
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