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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >Files and Directories [POSIX Section 5]</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="POSIX Standard Support" HREF="posix-standard-support.html"><LINK REL="PREVIOUS" TITLE="Process Environment [POSIX Section 4]" HREF="posix-process-environment.html"><LINK REL="NEXT" TITLE="Input and Output [POSIX Section 6]" HREF="posix-input-and-output.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="posix-process-environment.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 31. POSIX Standard Support</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="posix-input-and-output.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="POSIX-FILES-AND-DIRECTORIES">Files and Directories [POSIX Section 5]</H1 ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN13039">Functions Implemented</H2 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SCREEN" >DIR *opendir( const char *dirname ); struct dirent *readdir( DIR *dirp ); int readdir_r( DIR *dirp, struct dirent *entry, struct dirent **result ); void rewinddir( DIR *dirp ); int closedir( DIR *dirp ); int chdir( const char *path ); char *getcwd( char *buf, size_t size ); int open( const char * path , int oflag , ... ); int creat( const char * path, mode_t mode ); int link( const char *existing, const char *new ); int mkdir( const char *path, mode_t mode ); int unlink( const char *path ); int rmdir( const char *path ); int rename( const char *old, const char *new ); int stat( const char *path, struct stat *buf ); int fstat( int fd, struct stat *buf ); int access( const char *path, int amode ); long pathconf(const char *path, int name); long fpathconf(int fd, int name);</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN13042">Functions Omitted</H2 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SCREEN" >mode_t umask( mode_t cmask ); int mkfifo( const char *path, mode_t mode ); int chmod( const char *path, mode_t mode ); // TBA int fchmod( int fd, mode_t mode ); // TBA int chown( const char *path, uid_t owner, gid_t group ); int utime( const char *path, const struct utimbuf *times ); // TBA int ftruncate( int fd, off_t length ); // TBA</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN13045">Notes</H2 ><P ></P ><UL ><LI ><P > If a call to <TT CLASS="FUNCTION" >open()</TT > or <TT CLASS="FUNCTION" >creat()</TT > supplies the third _mode_ parameter, it will currently be ignored. </P ></LI ><LI ><P > Most of the functionality of these functions depends on the underlying filesystem. </P ></LI ><LI ><P > Currently<SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" > access()</I ></SPAN > only checks the <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >F_OK</I ></SPAN > mode explicitly, the others are all assumed to be true by default. </P ></LI ><LI ><P > The maximum number of open files allowed is supplied by the CYGNUM_FILEIO_NFILE option. The maximum number of file descriptors is supplied by the CYGNUM_FILEIO_NFD option. </P ></LI ></UL ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="posix-process-environment.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="posix-input-and-output.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Process Environment [POSIX Section 4]</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="posix-standard-support.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Input and Output [POSIX Section 6]</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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