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READDIR
Section: Linux Programmer's Manual (2)
Updated: 2007-06-01
Index
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NAME
readdir - read directory entry
SYNOPSIS
#include <linux/types.h>
#include <linux/dirent.h>
int readdir(unsigned int fd, struct dirent *dirp,
unsigned int count);
DESCRIPTION
This is not the function you are interested in.
Look at
readdir(3)
for the POSIX conforming C library interface.
This page documents the bare kernel system call interface,
which can change, and which is superseded by
getdents(2).
readdir()
reads one
dirent
structure from the directory
referred to by the file descriptor
fd
into the buffer pointed to by
dirp.
The argument
count
is ignored; at most one
dirent
structure is read.
The
dirent
structure is declared as follows:
struct dirent {
long d_ino; /* inode number */
off_t d_off; /* offset to this dirent */
unsigned short d_reclen; /* length of this d_name */
char d_name[NAME_MAX+1]; /* filename (null-terminated) */
}
d_ino
is an inode number.
d_off
is the distance from the start of the directory to this
dirent.
d_reclen
is the size of
d_name,
not counting the null terminator.
d_name
is a null-terminated filename.
RETURN VALUE
On success, 1 is returned.
On end of directory, 0 is returned.
On error, -1 is returned, and
errno
is set appropriately.
ERRORS
- EBADF
-
Invalid file descriptor
fd.
- EFAULT
-
Argument points outside the calling process's address space.
- EINVAL
-
Result buffer is too small.
- ENOENT
-
No such directory.
- ENOTDIR
-
File descriptor does not refer to a directory.
CONFORMING TO
This system call is Linux-specific.
NOTES
Glibc does not provide a wrapper for this system call; call it using
syscall(2).
SEE ALSO
getdents(2),
readdir(3)
COLOPHON
This page is part of release 3.05 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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