readdir — read directory entry
#include <linux/types.h> #include <linux/dirent.h> #include <linux/unistd.h> #include <errno.h> _syscall3(int, readdir, unsigned int, fd, struct dirent *, dirp, unsigned int, count) /* Using syscall(2) may be preferable; see intro(2) */
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 This page documents the bare kernel system call interface, which can change, and which is superseded by getdents(2).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 thisdirent
*/ unsigned short d_reclen; /* length of thisd_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.
On success, 1 is returned. On end of directory, 0 is
returned. On error, −1 is returned, and errno
is set appropriately.
Invalid file descriptor fd
.
Argument points outside the calling process's address space.
Result buffer is too small.
No such directory.
File descriptor does not refer to a directory.
|