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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/><meta http-equiv="X-UA-Compatible" content="IE=9"/><meta name="generator" content="Doxygen 1.8.8"/><title>fuse: include/fuse_opt.h File Reference</title><link href="tabs.css" rel="stylesheet" type="text/css"/><script type="text/javascript" src="jquery.js"></script><script type="text/javascript" src="dynsections.js"></script><link href="doxygen.css" rel="stylesheet" type="text/css" /></head><body><div id="top"><!-- do not remove this div, it is closed by doxygen! --><div id="titlearea"><table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">fuse </div> </td> </tr> </tbody></table></div><!-- end header part --><!-- Generated by Doxygen 1.8.8 --> <div id="navrow1" class="tabs"> <ul 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name="nested-classes"></a>Data Structures</h2></td></tr><tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structfuse__opt.html">fuse_opt</a></td></tr><tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structfuse__args.html">fuse_args</a></td></tr><tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr></table><table class="memberdecls"><tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>Macros</h2></td></tr><tr class="memitem:a371d830a8aedd9e3f96d9bb31876a8f1"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a371d830a8aedd9e3f96d9bb31876a8f1">FUSE_OPT_KEY</a>(templ, key)   { templ, -1U, key }</td></tr><tr class="separator:a371d830a8aedd9e3f96d9bb31876a8f1"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:aca35962e17d189ceb5447f8eea11bd33"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#aca35962e17d189ceb5447f8eea11bd33">FUSE_OPT_END</a>   { NULL, 0, 0 }</td></tr><tr class="separator:aca35962e17d189ceb5447f8eea11bd33"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a9bea40fe56b18be9aa110185ab7387ed"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a9bea40fe56b18be9aa110185ab7387ed">FUSE_ARGS_INIT</a>(argc, argv)   { argc, argv, 0 }</td></tr><tr class="separator:a9bea40fe56b18be9aa110185ab7387ed"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a48cb1aea482de904a848651360117748"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a48cb1aea482de904a848651360117748">FUSE_OPT_KEY_OPT</a>   -1</td></tr><tr class="separator:a48cb1aea482de904a848651360117748"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a632b025441794a4e6fe59b7ab53bbfc4"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a632b025441794a4e6fe59b7ab53bbfc4">FUSE_OPT_KEY_NONOPT</a>   -2</td></tr><tr class="separator:a632b025441794a4e6fe59b7ab53bbfc4"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a8533ff341f910c1bd05f10c8fcc35a04"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a8533ff341f910c1bd05f10c8fcc35a04">FUSE_OPT_KEY_KEEP</a>   -3</td></tr><tr class="separator:a8533ff341f910c1bd05f10c8fcc35a04"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a6e97b6ce492f1baaaf0a4eb4970c9a2f"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a6e97b6ce492f1baaaf0a4eb4970c9a2f">FUSE_OPT_KEY_DISCARD</a>   -4</td></tr><tr class="separator:a6e97b6ce492f1baaaf0a4eb4970c9a2f"><td class="memSeparator" colspan="2"> </td></tr></table><table class="memberdecls"><tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>Typedefs</h2></td></tr><tr class="memitem:a975525ccd73368c818ef2e3e917aeb33"><td class="memItemLeft" align="right" valign="top">typedef int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a975525ccd73368c818ef2e3e917aeb33">fuse_opt_proc_t</a> )(void *data, const char *arg, int key, struct <a class="el" href="structfuse__args.html">fuse_args</a> *outargs)</td></tr><tr class="separator:a975525ccd73368c818ef2e3e917aeb33"><td class="memSeparator" colspan="2"> </td></tr></table><table class="memberdecls"><tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>Functions</h2></td></tr><tr class="memitem:a539ef1f571c34f516c60c4cbe2901c0e"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a539ef1f571c34f516c60c4cbe2901c0e">fuse_opt_parse</a> (struct <a class="el" href="structfuse__args.html">fuse_args</a> *args, void *data, const struct <a class="el" href="structfuse__opt.html">fuse_opt</a> opts[], <a class="el" href="fuse__opt_8h.html#a975525ccd73368c818ef2e3e917aeb33">fuse_opt_proc_t</a> proc)</td></tr><tr class="separator:a539ef1f571c34f516c60c4cbe2901c0e"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:aaae525d5e959c5394bc323be0c1d02b0"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#aaae525d5e959c5394bc323be0c1d02b0">fuse_opt_add_opt</a> (char **opts, const char *opt)</td></tr><tr class="separator:aaae525d5e959c5394bc323be0c1d02b0"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a51a00d087d08bef250a53b9e4979b1cd"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a51a00d087d08bef250a53b9e4979b1cd">fuse_opt_add_opt_escaped</a> (char **opts, const char *opt)</td></tr><tr class="separator:a51a00d087d08bef250a53b9e4979b1cd"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a21602e6a0fff64fc9c7b642d12382094"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a21602e6a0fff64fc9c7b642d12382094">fuse_opt_add_arg</a> (struct <a class="el" href="structfuse__args.html">fuse_args</a> *args, const char *arg)</td></tr><tr class="separator:a21602e6a0fff64fc9c7b642d12382094"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:adb2922444d67f58e4233d21320386bc0"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#adb2922444d67f58e4233d21320386bc0">fuse_opt_insert_arg</a> (struct <a class="el" href="structfuse__args.html">fuse_args</a> *args, int pos, const char *arg)</td></tr><tr class="separator:adb2922444d67f58e4233d21320386bc0"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:a2cdf272429ab3869a5162976141b287d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#a2cdf272429ab3869a5162976141b287d">fuse_opt_free_args</a> (struct <a class="el" href="structfuse__args.html">fuse_args</a> *args)</td></tr><tr class="separator:a2cdf272429ab3869a5162976141b287d"><td class="memSeparator" colspan="2"> </td></tr><tr class="memitem:af16c684bd2b10b7ac0ae299afa1e0e06"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="fuse__opt_8h.html#af16c684bd2b10b7ac0ae299afa1e0e06">fuse_opt_match</a> (const struct <a class="el" href="structfuse__opt.html">fuse_opt</a> opts[], const char *opt)</td></tr><tr class="separator:af16c684bd2b10b7ac0ae299afa1e0e06"><td class="memSeparator" colspan="2"> </td></tr></table><a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2><div class="textblock"><p>This file defines the option parsing interface of FUSE </p></div><h2 class="groupheader">Macro Definition Documentation</h2><a class="anchor" id="a9bea40fe56b18be9aa110185ab7387ed"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_ARGS_INIT</td> <td>(</td> <td class="paramtype"> </td> <td class="paramname">argc, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"> </td> <td class="paramname">argv </td> </tr> <tr> <td></td> <td>)</td> <td></td><td>   { argc, argv, 0 }</td> </tr> </table></div><div class="memdoc"><p>Initializer for 'struct <a class="el" href="structfuse__args.html">fuse_args</a>' </p>
</div></div><a class="anchor" id="aca35962e17d189ceb5447f8eea11bd33"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_END   { NULL, 0, 0 }</td> </tr> </table></div><div class="memdoc"><p>Last option. An array of 'struct <a class="el" href="structfuse__opt.html">fuse_opt</a>' must end with a NULL template value </p>
</div></div><a class="anchor" id="a371d830a8aedd9e3f96d9bb31876a8f1"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_KEY</td> <td>(</td> <td class="paramtype"> </td> <td class="paramname">templ, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"> </td> <td class="paramname">key </td> </tr> <tr> <td></td> <td>)</td> <td></td><td>   { templ, -1U, key }</td> </tr> </table></div><div class="memdoc"><p>Key option. In case of a match, the processing function will be called with the specified key. </p>
</div></div><a class="anchor" id="a6e97b6ce492f1baaaf0a4eb4970c9a2f"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_KEY_DISCARD   -4</td> </tr> </table></div><div class="memdoc"><p>Special key value for options to discard</p><p>Argument is not passed to processing function, but behave as if the processing function returned zero </p>
</div></div><a class="anchor" id="a8533ff341f910c1bd05f10c8fcc35a04"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_KEY_KEEP   -3</td> </tr> </table></div><div class="memdoc"><p>Special key value for options to keep</p><p>Argument is not passed to processing function, but behave as if the processing function returned 1 </p>
</div></div><a class="anchor" id="a632b025441794a4e6fe59b7ab53bbfc4"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_KEY_NONOPT   -2</td> </tr> </table></div><div class="memdoc"><p>Key value passed to the processing function for all non-options</p><p>Non-options are the arguments beginning with a character other than '-' or all arguments after the special '–' option </p>
</div></div><a class="anchor" id="a48cb1aea482de904a848651360117748"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">#define FUSE_OPT_KEY_OPT   -1</td> </tr> </table></div><div class="memdoc"><p>Key value passed to the processing function if an option did not match any template </p>
</div></div><h2 class="groupheader">Typedef Documentation</h2><a class="anchor" id="a975525ccd73368c818ef2e3e917aeb33"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">typedef int(* fuse_opt_proc_t)(void *data, const char *arg, int key, struct <a class="el" href="structfuse__args.html">fuse_args</a> *outargs)</td> </tr> </table></div><div class="memdoc"><p>Processing function</p><p>This function is called if</p><ul><li>option did not match any 'struct <a class="el" href="structfuse__opt.html">fuse_opt</a>'</li><li>argument is a non-option</li><li>option did match and offset was set to -1</li></ul><p>The 'arg' parameter will always contain the whole argument or option including the parameter if exists. A two-argument option ("-x foo") is always converted to single argument option of the form "-xfoo" before this function is called.</p><p>Options of the form '-ofoo' are passed to this function without the '-o' prefix.</p><p>The return value of this function determines whether this argument is to be inserted into the output argument vector, or discarded.</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">data</td><td>is the user data passed to the <a class="el" href="fuse__opt_8h.html#a539ef1f571c34f516c60c4cbe2901c0e">fuse_opt_parse()</a> function </td></tr> <tr><td class="paramname">arg</td><td>is the whole argument or option </td></tr> <tr><td class="paramname">key</td><td>determines why the processing function was called </td></tr> <tr><td class="paramname">outargs</td><td>the current output argument list </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on error, 0 if arg is to be discarded, 1 if arg should be kept </dd></dl>
</div></div><h2 class="groupheader">Function Documentation</h2><a class="anchor" id="a21602e6a0fff64fc9c7b642d12382094"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_add_arg </td> <td>(</td> <td class="paramtype">struct <a class="el" href="structfuse__args.html">fuse_args</a> * </td> <td class="paramname"><em>args</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const char * </td> <td class="paramname"><em>arg</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Add an argument to a NULL terminated argument vector</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">args</td><td>is the structure containing the current argument list </td></tr> <tr><td class="paramname">arg</td><td>is the new argument to add </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on allocation error, 0 on success </dd></dl>
</div></div><a class="anchor" id="aaae525d5e959c5394bc323be0c1d02b0"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_add_opt </td> <td>(</td> <td class="paramtype">char ** </td> <td class="paramname"><em>opts</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const char * </td> <td class="paramname"><em>opt</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Add an option to a comma separated option list</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">opts</td><td>is a pointer to an option list, may point to a NULL value </td></tr> <tr><td class="paramname">opt</td><td>is the option to add </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on allocation error, 0 on success </dd></dl>
</div></div><a class="anchor" id="a51a00d087d08bef250a53b9e4979b1cd"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_add_opt_escaped </td> <td>(</td> <td class="paramtype">char ** </td> <td class="paramname"><em>opts</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const char * </td> <td class="paramname"><em>opt</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Add an option, escaping commas, to a comma separated option list</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">opts</td><td>is a pointer to an option list, may point to a NULL value </td></tr> <tr><td class="paramname">opt</td><td>is the option to add </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on allocation error, 0 on success </dd></dl>
</div></div><a class="anchor" id="a2cdf272429ab3869a5162976141b287d"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">void fuse_opt_free_args </td> <td>(</td> <td class="paramtype">struct <a class="el" href="structfuse__args.html">fuse_args</a> * </td> <td class="paramname"><em>args</em></td><td>)</td> <td></td> </tr> </table></div><div class="memdoc"><p>Free the contents of argument list</p><p>The structure itself is not freed</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">args</td><td>is the structure containing the argument list </td></tr> </table> </dd></dl>
</div></div><a class="anchor" id="adb2922444d67f58e4233d21320386bc0"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_insert_arg </td> <td>(</td> <td class="paramtype">struct <a class="el" href="structfuse__args.html">fuse_args</a> * </td> <td class="paramname"><em>args</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>pos</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const char * </td> <td class="paramname"><em>arg</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Add an argument at the specified position in a NULL terminated argument vector</p><p>Adds the argument to the N-th position. This is useful for adding options at the beginning of the array which must not come after the special '–' option.</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">args</td><td>is the structure containing the current argument list </td></tr> <tr><td class="paramname">pos</td><td>is the position at which to add the argument </td></tr> <tr><td class="paramname">arg</td><td>is the new argument to add </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on allocation error, 0 on success </dd></dl>
</div></div><a class="anchor" id="af16c684bd2b10b7ac0ae299afa1e0e06"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_match </td> <td>(</td> <td class="paramtype">const struct <a class="el" href="structfuse__opt.html">fuse_opt</a> </td> <td class="paramname"><em>opts</em>[], </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const char * </td> <td class="paramname"><em>opt</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Check if an option matches</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">opts</td><td>is the option description array </td></tr> <tr><td class="paramname">opt</td><td>is the option to match </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>1 if a match is found, 0 if not </dd></dl>
</div></div><a class="anchor" id="a539ef1f571c34f516c60c4cbe2901c0e"></a><div class="memitem"><div class="memproto"> <table class="memname"> <tr> <td class="memname">int fuse_opt_parse </td> <td>(</td> <td class="paramtype">struct <a class="el" href="structfuse__args.html">fuse_args</a> * </td> <td class="paramname"><em>args</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">void * </td> <td class="paramname"><em>data</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const struct <a class="el" href="structfuse__opt.html">fuse_opt</a> </td> <td class="paramname"><em>opts</em>[], </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="fuse__opt_8h.html#a975525ccd73368c818ef2e3e917aeb33">fuse_opt_proc_t</a> </td> <td class="paramname"><em>proc</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table></div><div class="memdoc"><p>Option parsing function</p><p>If 'args' was returned from a previous call to <a class="el" href="fuse__opt_8h.html#a539ef1f571c34f516c60c4cbe2901c0e">fuse_opt_parse()</a> or it was constructed from</p><p>A NULL 'args' is equivalent to an empty argument vector</p><p>A NULL 'opts' is equivalent to an 'opts' array containing a single end marker</p><p>A NULL 'proc' is equivalent to a processing function always returning '1'</p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">args</td><td>is the input and output argument list </td></tr> <tr><td class="paramname">data</td><td>is the user data </td></tr> <tr><td class="paramname">opts</td><td>is the option description array </td></tr> <tr><td class="paramname">proc</td><td>is the processing function </td></tr> </table> </dd></dl><dl class="section return"><dt>Returns</dt><dd>-1 on error, 0 on success </dd></dl>
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