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getdents() - Unix, Linux System Call
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NAME
getdents - get directory entries
SYNOPSIS
#include <unistd.h>
#include <linux/types.h>
#include <linux/dirent.h>
#include <linux/unistd.h>
#include <errno.h>
int getdents(unsigned int fd, struct dirent *dirp, unsigned int count);
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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.
The system call
getdents() reads several
dirent structures from the directory
pointed at by
fd into the memory area pointed to by
dirp. The parameter
count is the size of the memory area.
The
dirent structure is declared as follows:
struct dirent {
long d_ino; /* inode number */
off_t d_off; /* offset to next dirent */
unsigned short d_reclen; /* length of this dirent */
char d_name [NAME_MAX+1]; /* filename (null-terminated) */
}
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d_ino is an inode number.
d_off is the distance from the start of the directory to the start of the next
dirent. d_reclen is the size of this entire
dirent. d_name is a null-terminated filename.
This call supersedes
readdir(2).
RETURN VALUE
On success, the number of bytes read is returned.
On end of directory, 0 is returned.
On error, -1 is returned, and
errno is set appropriately.
ERRORS
Tag | Description |
EBADF |
Invalid file descriptor
fd. |
EFAULT |
Argument points outside the calling processs address space.
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EINVAL |
Result buffer is too small.
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ENOENT |
No such directory.
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ENOTDIR | |
File descriptor does not refer to a directory.
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CONFORMING TO
SVr4.
NOTES
Glibc does not provide a wrapper for this system call; call it using
syscall(2).
SEE ALSO
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