Originální popis anglicky:
readdir - read directory entry
Návod, kniha: Linux Programmer's Manual
#include <unistd.h>
#include <linux/dirent.h>
#include <linux/unistd.h>
_syscall3(int, readdir, uint, fd, struct dirent *, dirp, uint, count);
int readdir(unsigned int fd, struct dirent *dirp, unsigned int count);
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system call interface, which can change, and which is superseded by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 pointed at
by
fd into the memory area pointed to by
dirp. The parameter
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]; /* file name (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 file name.
On success, 1 is returned. On end of directory, 0 is returned. On error, -1 is
returned, and
errno is set appropriately.
- 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.
This system call is Linux specific.
getdents(2),
readdir(3)
