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<!--
libexplain - Explain errno values returned by libc functions
Copyright (C) 2009, 2010 Peter Miller
Written by Peter Miller <pmiller@opensource.org.au>
This program is free software; you can redistribute it and/or modify
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<title>
No Medium Found, 2.0, Notes
</title>
</head>
<body>
<table width="100%" >
<tr>
<td align="left" >
<a href="100-notes.html" >Prev</a>,
<a href="000-notes.html" >Top</a>
</td><td align="right" >
<a href="200-slide.html" >Slide</a>,
<a href="300-notes.html" >Next</a>
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<h1 >
2. Using the Library
</h1>
<h2> 2.1 The simple case </h2>
const char *explain_rename(const char *oldpath, const char *newpath);
<br/>
<a href="210-slide.html" >slide</a>
<h2> 2.2 The errno case </h2>
const char *explain_errno_rename(int errno, const char *oldpath,
const char *newpath);
<br/>
<a href="220-slide.html" >slide</a>
<h2> 2.3 Multi-thread </h2>
const char *explain_message_rename(char *msg, size_t msg_size, int errno,
const char *oldpath, const char *newpath);
<br/>
const char *explain_message_errno_rename(char *msg, size_t msg_size, int errno,
const char *oldpath, const char *newpath);
<br/>
<a href="230-slide.html" >slide</a>
<h2> 2.4 Interface Sugar </h2>
int explain_rename_or_die(const char *oldpath, const char *newpath);
<br>
int explain_rename_on_error(const char *oldpath, const char *newpath);
<br/>
<a href="240-slide.html" >slide</a>
<h2> 2.5 All the other system calls </h2>
as above, but as appropriate
<br/>
<a href="250-slide.html" >slide</a>
<h2> 2.6 cat </h2>
<a href="260-slide.html" >slide</a>
<ul>
<li> code example
<li> full error handling, no tramp data
<li> even works for stdout
</ul>
<h2> 2.7 Rusty's Scale of Interface Goodness </h2>
<a href="270-slide.html" >slide</a>
<table >
<tr><td valign="top" align="right" >10.</td>
<td valign="top" >It's impossible to get wrong.</td></tr>
<tr><td valign="top" align="right" >9.</td>
<td valign="top" >The compiler or linker won't let you get it
wrong.</td></tr>
<tr><td valign="top" align="right" >8.</td>
<td valign="top" >The compiler will warn if you get it wrong.</td></tr>
<tr><td valign="top" align="right" >7.</td>
<td valign="top" >The obvious use is (probably) the correct one.</td></tr>
<tr><td valign="top" align="right" >6.</td>
<td valign="top" >The name tells you how to use it.</td></tr>
<tr><td valign="top" align="right" >5.</td>
<td valign="top" >Do it right or it will break at runtime.</td></tr>
<tr><td valign="top" align="right" >4.</td>
<td valign="top" >Follow common convention and you'll get it
right.</td></tr>
<tr><td valign="top" align="right" >3.</td>
<td valign="top" >Read the documentation and you'll get it right.</td></tr>
</table>
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