Manpage of READDIR

READDIR

Section: Linux Programmer's Manual (2)
Updated: 2013-06-21
Index
 

NAME

readdir - read directory entry  

SYNOPSIS

int readdir(unsigned int fd, struct old_linux_dirent *dirp,            unsigned int count);

Note: There is no glibc wrapper for this system call; see NOTES.  

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 This page documents the bare kernel system call interface, which is superseded by getdents(2).

readdir() reads one old_linux_direntstructure from the directory referred to by the file descriptor fdinto the buffer pointed to by dirp. The argument countis ignored; at most one old_linux_direntstructure is read.

The old_linux_direntstructure is declared as follows:

struct old_linux_dirent {
    long  d_ino;              /* inode number */
    off_t d_off;              /* offset to this old_linux_dirent */
    unsigned short d_reclen;  /* length of this d_name */
    char  d_name[NAME_MAX+1]; /* filename (null-terminated) */
}

d_inois an inode number. d_offis the distance from the start of the directory to this old_linux_dirent. d_reclenis the size of d_name, not counting the terminating null byte (aq\0aq). d_nameis a null-terminated filename.  

RETURN VALUE

On success, 1 is returned. On end of directory, 0 is returned. On error, -1 is returned, and errnois 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). You will need to define the old_linux_direntstructure yourself. However, probably you should use readdir(3) instead.

This system call does not exist on x86-64.  

SEE ALSO

getdents(2), readdir(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO

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Time: 22:27:43 GMT, June 20, 2016