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- <html>
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- <title>getdirentry</title>
- <body bgcolor=#ffffff>
- <h2 align=center>getdirentry</h2>
- <h4 align=center>OS/161 Reference Manual</h4>
- <h3>Name</h3>
- getdirentry - read filename from directory
- <h3>Library</h3>
- Standard C Library (libc, -lc)
- <h3>Synopsis</h3>
- #include <unistd.h><br>
- <br>
- int<br>
- getdirentry(int <em>fd</em>, char *<em>buf</em>, size_t <em>buflen</em>);
- <h3>Description</h3>
- getdirentry retrieves the next filename from a directory referred to
- by the file handle <em>filehandle</em>. The name is stored in
- <em>buf</em>, an area of size <em>buflen</em>. The length of of the
- name actually found is returned.
- <p>
- Note: this call behaves like read() - the name stored in <em>buf</em>
- is not null-terminated.
- <p>
- Which filename is the "next" is chosen based on the seek pointer
- associated with the file handle. The meaning of the seek pointer on a
- directory is defined by the filesystem in use and should not be
- interpreted - the only ways in which <A HREF=lseek.html>lseek</A>
- should be used are with SEEK_SET and an offset previously returned by
- lseek, or with any of SEEK_SET, SEEK_CUR, or SEEK_EOF with an offset
- of 0.
- <p>
- <h3>Return Values</h3>
- On success, getdirentry returns the length of the name transferred.
- On error, -1 is returned, and <A HREF=errno.html>errno</A> is set
- according to the error encountered.
- <h3>Errors</h3>
- <blockquote><table width=90%>
- <td width=10%> </td><td> </td></tr>
- <tr><td>EBADF</td> <td><em>fd</em> is not a valid file handle.</td></tr>
- <tr><td>ENOTDIR</td> <td><em>fd</em> does not refer to a directory.</td></tr>
- <tr><td>EIO</td> <td>A hard I/O error occurred.</td></tr>
- <tr><td>EFAULT</td> <td><em>buf</em> points to an invalid address.</td></tr>
- </table></blockquote>
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