READDIR

READDIR

NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO BUGS SEE ALSO

NAME

readdir - read a directory

SYNOPSIS

#include dir);

DESCRIPTION

The readdir() function returns a pointer to a dirent structure representing the next directory entry in the directory stream pointed to by dir. It returns NULL on reaching the end-of-file or if an error occurred.

The data returned by readdir() is overwritten by subsequent calls to readdir() for the same directory stream.

The dirent structure is defined as follows:

struct dirent { long d_ino; /* inode number / off_t d_off; / offset to the next dirent / unsigned short d_reclen;/ length of this record / unsigned char d_type; / type of file / char d_name[256?; / filename */ };

RETURN VALUE

The readdir() function returns a pointer to a dirent structure, or NULL if an error occurs or end-of-file is reached.

ERRORS

EBADF

Invalid directory stream descriptor dir.

CONFORMING TO

SVID 3, POSIX, BSD 4.3

According to POSIX, the dirent structure contains a field char d_name[? of unspecified size, with at most NAME_MAX characters preceding the terminating null character. Use of other fields will harm the portability of your programs.

BUGS

Field d_type is not implemented as of libc6 2.1 and will always return DT_UNKNOWN (0).

SEE ALSO

read(2), opendir(3), closedir(3), rewinddir(3), seekdir(3), telldir(3), scandir(3)