<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html> <!-- SECTION: Programming --> <head> <title>File and Directory APIs</title> <meta name='keywords' content='Programming'> <meta name='creator' content='Mini-XML v2.3'> <style type='text/css'><!-- h1, h2, h3, p { font-family: sans-serif; text-align: justify; } tt, pre a:link, pre a:visited, tt a:link, tt a:visited { font-weight: bold; color: #7f0000; } pre { font-weight: bold; color: #7f0000; margin-left: 2em; } span.info { background: #000000; border: solid thin #000000; color: #ffffff; font-size: 80%; font-style: italic; font-weight: bold; white-space: nowrap; } h3 span.info { float: right; font-size: 100%; } h1.title, h2.title, h3.title { border-bottom: solid 2px #000000; } --></style> </head> <body> <!-- "$Id: api-filedir.shtml 6649 2007-07-11 21:46:42Z mike $" File and directory API introduction for the Common UNIX Printing System (CUPS). Copyright 2007 by Apple Inc. Copyright 1997-2005 by Easy Software Products, all rights reserved. These coded instructions, statements, and computer programs are the property of Apple Inc. and are protected by Federal copyright law. Distribution and use rights are outlined in the file "LICENSE.txt" which should have been included with this file. If this file is file is missing or damaged, see the license at "http://www.cups.org/". --> <h2 class='title'>Introduction</h2> <p>The CUPS file and directory APIs provide portable interfaces for manipulating files and listing files and directories. Unlike stdio <tt>FILE</tt> streams, the <tt>cupsFile</tt> functions allow you to open more than 256 files at any given time. They also manage the platform-specific details of locking, large file support, line endings (CR, LF, or CR LF), and reading and writing files using Flate ("gzip") compression. Finally, you can also connect, read from, and write to network connections using the <tt>cupsFile</tt> functions.</p> <p>The <tt>cupsDir</tt> functions manage the platform-specific details of directory access/listing and provide a convenient way to get both a list of files and the information (permissions, size, timestamp, etc.) for each of those files.</p> <p>The CUPS scheduler (<tt>cupsd</tt>), <tt>mailto</tt> notifier, and many of the CUPS API functions use these functions for everything except console (stdin, stdout, stderr) I/O.</p> <h2 class='title'>General Usage</h2> <p>The <var><cups/dir.h></var> and <var><cups/file.h></var> header files must be included to use the <tt>cupsDir</tt> and <tt>cupsFile</tt> functions, respectively.</p> <p>Programs using these functions must be linked to the CUPS library: <var>libcups.a</var>, <var>libcups.so.2</var>, <var>libcups.2.dylib</var>, <var>libcups_s.a</var>, or <var>libcups2.lib</var> depending on the platform. The following command compiles <var>myprogram.c</var> using GCC and the CUPS library:</p> <pre class='command'> <kbd>gcc -o myprogram myprogram.c -lcups</kbd> </pre> <h2 class='title'>Compatibility</h2> <p>All of these functions require CUPS 1.2 or higher.</p> <h2 class='title'>Contents</h2> <ul> <li><a href='#FUNCTIONS'>Functions</a></li> <li><a href='#STRUCTURES'>Structures</a></li> <li><a href='#TYPES'>Types</a></li> </ul> <!-- NEW PAGE --> <h2 class='title'><a name='FUNCTIONS'>Functions</a></h2> <ul> <li><a href='#cupsDirClose'><tt>cupsDirClose()</tt></a> </li> <li><a href='#cupsDirOpen'><tt>cupsDirOpen()</tt></a> </li> <li><a href='#cupsDirRead'><tt>cupsDirRead()</tt></a> </li> <li><a href='#cupsDirRewind'><tt>cupsDirRewind()</tt></a> </li> <li><a href='#cupsFileClose'><tt>cupsFileClose()</tt></a> </li> <li><a href='#cupsFileCompression'><tt>cupsFileCompression()</tt></a> </li> <li><a href='#cupsFileEOF'><tt>cupsFileEOF()</tt></a> </li> <li><a href='#cupsFileFind'><tt>cupsFileFind()</tt></a> </li> <li><a href='#cupsFileFlush'><tt>cupsFileFlush()</tt></a> </li> <li><a href='#cupsFileGetChar'><tt>cupsFileGetChar()</tt></a> </li> <li><a href='#cupsFileGetConf'><tt>cupsFileGetConf()</tt></a> </li> <li><a href='#cupsFileGetLine'><tt>cupsFileGetLine()</tt></a> </li> <li><a href='#cupsFileGets'><tt>cupsFileGets()</tt></a> </li> <li><a href='#cupsFileLock'><tt>cupsFileLock()</tt></a> </li> <li><a href='#cupsFileNumber'><tt>cupsFileNumber()</tt></a> </li> <li><a href='#cupsFileOpen'><tt>cupsFileOpen()</tt></a> </li> <li><a href='#cupsFileOpenFd'><tt>cupsFileOpenFd()</tt></a> </li> <li><a href='#cupsFilePeekChar'><tt>cupsFilePeekChar()</tt></a> </li> <li><a href='#cupsFilePrintf'><tt>cupsFilePrintf()</tt></a> </li> <li><a href='#cupsFilePutChar'><tt>cupsFilePutChar()</tt></a> </li> <li><a href='#cupsFilePuts'><tt>cupsFilePuts()</tt></a> </li> <li><a href='#cupsFileRead'><tt>cupsFileRead()</tt></a> </li> <li><a href='#cupsFileRewind'><tt>cupsFileRewind()</tt></a> </li> <li><a href='#cupsFileSeek'><tt>cupsFileSeek()</tt></a> </li> <li><a href='#cupsFileStderr'><tt>cupsFileStderr()</tt></a> </li> <li><a href='#cupsFileStdin'><tt>cupsFileStdin()</tt></a> </li> <li><a href='#cupsFileStdout'><tt>cupsFileStdout()</tt></a> </li> <li><a href='#cupsFileTell'><tt>cupsFileTell()</tt></a> </li> <li><a href='#cupsFileUnlock'><tt>cupsFileUnlock()</tt></a> </li> <li><a href='#cupsFileWrite'><tt>cupsFileWrite()</tt></a> </li> </ul> <!-- NEW PAGE --> <h3 class='title'><a name='cupsDirClose'>cupsDirClose()</a></h3> <h4>Description</h4> <p>Close a directory. <h4>Syntax</h4> <p><tt> void<br> cupsDirClose( <a href='#cups_dir_t'>cups_dir_t</a> * dp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>dp</tt></td><td>Directory</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Nothing.</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsDirOpen'>cupsDirOpen()</a></h3> <h4>Description</h4> <p>Open a directory. <h4>Syntax</h4> <p><tt> <a href='#cups_dir_t'>cups_dir_t</a> *<br> cupsDirOpen( const char * directory); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>directory</tt></td><td>Directory name</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Directory</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsDirRead'>cupsDirRead()</a></h3> <h4>Description</h4> <p>Read the next directory entry. <h4>Syntax</h4> <p><tt> <a href='#cups_dentry_t'>cups_dentry_t</a> *<br> cupsDirRead( <a href='#cups_dir_t'>cups_dir_t</a> * dp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>dp</tt></td><td>Directory</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Directory entry</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsDirRewind'>cupsDirRewind()</a></h3> <h4>Description</h4> <p>Rewind to the start of the directory. <h4>Syntax</h4> <p><tt> void<br> cupsDirRewind( <a href='#cups_dir_t'>cups_dir_t</a> * dp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>dp</tt></td><td>Directory</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Nothing.</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileClose'>cupsFileClose()</a></h3> <h4>Description</h4> <p>Close a CUPS file. <h4>Syntax</h4> <p><tt> int<br> cupsFileClose( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>0 on success, -1 on error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileCompression'>cupsFileCompression()</a></h3> <h4>Description</h4> <p>Return whether a file is compressed. <h4>Syntax</h4> <p><tt> int<br> cupsFileCompression( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>CUPS_FILE_NONE or CUPS_FILE_GZIP</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileEOF'>cupsFileEOF()</a></h3> <h4>Description</h4> <p>Return the end-of-file status. <h4>Syntax</h4> <p><tt> int<br> cupsFileEOF( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>1 on EOF, 0 otherwise</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileFind'>cupsFileFind()</a></h3> <h4>Description</h4> <p>Find a file using the specified path. <p>This function allows the paths in the path string to be separated by colons (UNIX standard) or semicolons (Windows standard) and stores the result in the buffer supplied. If the file cannot be found in any of the supplied paths, NULL is returned. A NULL path only matches the current directory. <h4>Syntax</h4> <p><tt> const char *<br> cupsFileFind( const char * filename, const char * path, int executable, char * buffer, int bufsize); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>filename</tt></td><td>File to find</td></tr> <tr><td><tt>path</tt></td><td>Colon/semicolon-separated path</td></tr> <tr><td><tt>executable</tt></td><td>1 = executable files, 0 = any file/dir</td></tr> <tr><td><tt>buffer</tt></td><td>Filename buffer</td></tr> <tr><td><tt>bufsize</tt></td><td>Size of filename buffer</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Full path to file or NULL</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileFlush'>cupsFileFlush()</a></h3> <h4>Description</h4> <p>Flush pending output. <h4>Syntax</h4> <p><tt> int<br> cupsFileFlush( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>0 on success, -1 on error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileGetChar'>cupsFileGetChar()</a></h3> <h4>Description</h4> <p>Get a single character from a file. <h4>Syntax</h4> <p><tt> int<br> cupsFileGetChar( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Character or -1 on EOF</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileGetConf'>cupsFileGetConf()</a></h3> <h4>Description</h4> <p>Get a line from a configuration file... <h4>Syntax</h4> <p><tt> char *<br> cupsFileGetConf( <a href='#cups_file_t'>cups_file_t</a> * fp, char * buf, size_t buflen, char ** value, int * linenum); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>buf</tt></td><td>String buffer</td></tr> <tr><td><tt>buflen</tt></td><td>Size of string buffer</td></tr> <tr><td><tt>value</tt></td><td>Pointer to value</td></tr> <tr><td><tt>linenum</tt></td><td>Current line number</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Line read or NULL on eof/error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileGetLine'>cupsFileGetLine()</a></h3> <h4>Description</h4> <p>Get a CR and/or LF-terminated line that may contain binary data. <p>This function differs from cupsFileGets() in that the trailing CR and LF are preserved, as is any binary data on the line. The buffer is nul- terminated, however you should use the returned length to determine the number of bytes on the line. <h4>Syntax</h4> <p><tt> size_t<br> cupsFileGetLine( <a href='#cups_file_t'>cups_file_t</a> * fp, char * buf, size_t buflen); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>File to read from</td></tr> <tr><td><tt>buf</tt></td><td>Buffer</td></tr> <tr><td><tt>buflen</tt></td><td>Size of buffer</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Number of bytes on line or 0 on EOF</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileGets'>cupsFileGets()</a></h3> <h4>Description</h4> <p>Get a CR and/or LF-terminated line. <h4>Syntax</h4> <p><tt> char *<br> cupsFileGets( <a href='#cups_file_t'>cups_file_t</a> * fp, char * buf, size_t buflen); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>buf</tt></td><td>String buffer</td></tr> <tr><td><tt>buflen</tt></td><td>Size of string buffer</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Line read or NULL on eof/error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileLock'>cupsFileLock()</a></h3> <h4>Description</h4> <p>Temporarily lock access to a file. <h4>Syntax</h4> <p><tt> int<br> cupsFileLock( <a href='#cups_file_t'>cups_file_t</a> * fp, int block); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>File to lock</td></tr> <tr><td><tt>block</tt></td><td>1 to wait for the lock, 0 to fail right away</td></tr> </tbody></table></div> <h4>Returns</h4> <p>0 on success, -1 on error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileNumber'>cupsFileNumber()</a></h3> <h4>Description</h4> <p>Return the file descriptor associated with a CUPS file. <h4>Syntax</h4> <p><tt> int<br> cupsFileNumber( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>File descriptor</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileOpen'>cupsFileOpen()</a></h3> <h4>Description</h4> <p>Open a CUPS file. <h4>Syntax</h4> <p><tt> <a href='#cups_file_t'>cups_file_t</a> *<br> cupsFileOpen( const char * filename, const char * mode); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>filename</tt></td><td>Name of file</td></tr> <tr><td><tt>mode</tt></td><td>Open mode</td></tr> </tbody></table></div> <h4>Returns</h4> <p>CUPS file or NULL</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileOpenFd'>cupsFileOpenFd()</a></h3> <h4>Description</h4> <p>Open a CUPS file using a file descriptor. <h4>Syntax</h4> <p><tt> <a href='#cups_file_t'>cups_file_t</a> *<br> cupsFileOpenFd( int fd, const char * mode); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fd</tt></td><td>File descriptor</td></tr> <tr><td><tt>mode</tt></td><td>Open mode</td></tr> </tbody></table></div> <h4>Returns</h4> <p>CUPS file or NULL</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFilePeekChar'>cupsFilePeekChar()</a></h3> <h4>Description</h4> <p>Peek at the next character from a file. <h4>Syntax</h4> <p><tt> int<br> cupsFilePeekChar( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Character or -1 on EOF</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFilePrintf'>cupsFilePrintf()</a></h3> <h4>Description</h4> <p>Write a formatted string. <h4>Syntax</h4> <p><tt> int<br> cupsFilePrintf( <a href='#cups_file_t'>cups_file_t</a> * fp, const char * format, ...); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>format</tt></td><td>Printf-style format string</td></tr> <tr><td><tt>...</tt></td><td>Additional args as necessary</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Number of bytes written or -1</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFilePutChar'>cupsFilePutChar()</a></h3> <h4>Description</h4> <p>Write a character. <h4>Syntax</h4> <p><tt> int<br> cupsFilePutChar( <a href='#cups_file_t'>cups_file_t</a> * fp, int c); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>c</tt></td><td>Character to write</td></tr> </tbody></table></div> <h4>Returns</h4> <p>0 on success, -1 on error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFilePuts'>cupsFilePuts()</a></h3> <h4>Description</h4> <p>Write a string. <h4>Syntax</h4> <p><tt> int<br> cupsFilePuts( <a href='#cups_file_t'>cups_file_t</a> * fp, const char * s); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>s</tt></td><td>String to write</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Number of bytes written or -1</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileRead'>cupsFileRead()</a></h3> <h4>Description</h4> <p>Read from a file. <h4>Syntax</h4> <p><tt> <a href='#ssize_t'>ssize_t</a><br> cupsFileRead( <a href='#cups_file_t'>cups_file_t</a> * fp, char * buf, size_t bytes); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>buf</tt></td><td>Buffer</td></tr> <tr><td><tt>bytes</tt></td><td>Number of bytes to read</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Number of bytes read or -1</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileRewind'>cupsFileRewind()</a></h3> <h4>Description</h4> <p>Rewind a file. <h4>Syntax</h4> <p><tt> off_t<br> cupsFileRewind( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>New file position or -1</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileSeek'>cupsFileSeek()</a></h3> <h4>Description</h4> <p>Seek in a file. <h4>Syntax</h4> <p><tt> off_t<br> cupsFileSeek( <a href='#cups_file_t'>cups_file_t</a> * fp, off_t pos); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>pos</tt></td><td>Position in file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>New file position or -1</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileStderr'>cupsFileStderr()</a></h3> <h4>Description</h4> <p>Just reposition the current pointer, since we have the right range... <h4>Syntax</h4> <p><tt> <a href='#cups_file_t'>cups_file_t</a> *<br> cupsFileStderr(void); </tt></p> <h4>Arguments</h4> <p>None.</p> <h4>Returns</h4> <p>Return a CUPS file associated with stderr.</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileStdin'>cupsFileStdin()</a></h3> <h4>Description</h4> <p>Open file descriptor 2... <h4>Syntax</h4> <p><tt> <a href='#cups_file_t'>cups_file_t</a> *<br> cupsFileStdin(void); </tt></p> <h4>Arguments</h4> <p>None.</p> <h4>Returns</h4> <p>Return a CUPS file associated with stdin.</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileStdout'>cupsFileStdout()</a></h3> <h4>Description</h4> <p>Open file descriptor 0... <h4>Syntax</h4> <p><tt> <a href='#cups_file_t'>cups_file_t</a> *<br> cupsFileStdout(void); </tt></p> <h4>Arguments</h4> <p>None.</p> <h4>Returns</h4> <p>Return a CUPS file associated with stdout.</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileTell'>cupsFileTell()</a></h3> <h4>Description</h4> <p>Return the current file position. <h4>Syntax</h4> <p><tt> off_t<br> cupsFileTell( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> </tbody></table></div> <h4>Returns</h4> <p>File position</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileUnlock'>cupsFileUnlock()</a></h3> <h4>Description</h4> <p>Unlock access to a file. <h4>Syntax</h4> <p><tt> int<br> cupsFileUnlock( <a href='#cups_file_t'>cups_file_t</a> * fp); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>File to lock</td></tr> </tbody></table></div> <h4>Returns</h4> <p>0 on success, -1 on error</p> <!-- NEW PAGE --> <h3 class='title'><a name='cupsFileWrite'>cupsFileWrite()</a></h3> <h4>Description</h4> <p>Write to a file. <h4>Syntax</h4> <p><tt> <a href='#ssize_t'>ssize_t</a><br> cupsFileWrite( <a href='#cups_file_t'>cups_file_t</a> * fp, const char * buf, size_t bytes); </tt></p> <h4>Arguments</h4> <div class='table'><table align='center' border='1' width='80%' cellpadding='5' cellspacing='0' summary='Arguments'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fp</tt></td><td>CUPS file</td></tr> <tr><td><tt>buf</tt></td><td>Buffer</td></tr> <tr><td><tt>bytes</tt></td><td>Number of bytes to write</td></tr> </tbody></table></div> <h4>Returns</h4> <p>Number of bytes written</p> <!-- NEW PAGE --> <h2 class='title'><a name='STRUCTURES'>Structures</a></h2> <ul> <li><a href='#cups_dentry_s'><tt>cups_dentry_s</tt></a> </li> </ul> <!-- NEW PAGE --> <h3 class='title'><a name='cups_dentry_s'>cups_dentry_s</a></h3> <h4>Description</h4> <p>Directory entry type <h4>Definition</h4> <p><tt> struct cups_dentry_s<br> {<br> struct stat fileinfo;<br> char filename[260];<br> };</tt></p> <h4>Members</h4> <div class='table'><table align='center' border='1' width='80%' summary='Members'> <thead><tr><th>Name</th><th>Description</th></tr></thead> <tbody> <tr><td><tt>fileinfo</tt> </td><td>File information </td></tr> <tr><td><tt>filename[260]</tt> </td><td>File name </td></tr> </tbody></table></div> <!-- NEW PAGE --> <h2 class='title'><a name='TYPES'>Types</a></h2> <ul> <li><a href='#cups_dentry_t'><tt>cups_dentry_t</tt></a> </li> <li><a href='#cups_dir_t'><tt>cups_dir_t</tt></a> </li> <li><a href='#cups_file_t'><tt>cups_file_t</tt></a> </li> </ul> <!-- NEW PAGE --> <h3 class='title'><a name='cups_dentry_t'>cups_dentry_t</a></h3> <h4>Description</h4> <p>Directory entry type <h4>Definition</h4> <p><tt> typedef struct <a href='#cups_dentry_s'>cups_dentry_s</a> cups_dentry_t; </tt></p> <!-- NEW PAGE --> <h3 class='title'><a name='cups_dir_t'>cups_dir_t</a></h3> <h4>Description</h4> <p>Directory type <h4>Definition</h4> <p><tt> typedef struct _cups_dir_s cups_dir_t; </tt></p> <!-- NEW PAGE --> <h3 class='title'><a name='cups_file_t'>cups_file_t</a></h3> <h4>Description</h4> <p>CUPS file type <h4>Definition</h4> <p><tt> typedef struct _cups_file_s cups_file_t; </tt></p> </body> </html>