READDIR(2) Linux Programmer's Manual READDIR(2)NAME
readdir - read directory entry
SYNOPSIS
#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);
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bare kernel system call interface, which can change, and which is superseded by getdents(2).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.
RETURN VALUE
On success, 1 is returned. On end of directory, 0 is returned. On error, -1 is returned, and errno is 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.
SEE ALSO getdents(2), readdir(3)Linux 1.3.6 1995-07-22 READDIR(2)
Check Out this Related Man Page
GETDENTS(2) Linux Programmer's Manual GETDENTS(2)NAME
getdents - get directory entries
SYNOPSIS
#include <unistd.h>
#include <linux/types.h>
#include <linux/dirent.h>
#include <linux/unistd.h>
_syscall3(int, getdents, uint, fd, struct dirent *, dirp, uint, count);
int getdents(unsigned int fd, struct dirent *dirp, unsigned int count);
DESCRIPTION
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]; /* file name (null-terminated) */
}
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 file name.
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 appro-
priately.
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
SVr4, SVID. SVr4 documents additional ENOLINK, EIO error conditions.
SEE ALSO readdir(2), readdir(3)Linux 1.3.6 1995-07-22 GETDENTS(2)
I am trying to read the directory contents throgh the readdir system call.
After getting the directory entry I am testing the type of it by using the folllowing macros S_ISDIR() S_ISREG() etc. But in some systems every file in the directory is displaying like a sub directory. and in some systems... (2 Replies)
Hi frnds,
i need ur help reg getdents command which is used to read the directory entries. I need to know the exact usage of the command and any sample code reg the usage of getdents command
-------------
deep :confused: (1 Reply)
Hi Friends,
Can anybody tell me what is the significance of having /etc directory structure in unix/linux
is there any specific reason to have that name as directory so as to store all process files or any other reason..
thanks
Vasikaran (1 Reply)
I read the description of the command readdir by using 'man readdir'. However, in the description i was suggesed to refer to readdir(3).
I wonder how to see the manual of readdir(3)
Thanks (1 Reply)
Does anyone here knows DSD scripting language?
How i read all files from a directory? I must use readdir in a while loop but i don;t know how? Help? (0 Replies)
hi all,
im using dirent.h headers readdir() function to traverse down a directory ( after openning it with opendir() ), and im printing the dir->d_name in a program.
while(( dir = readdir( d ) ) != NULL ){
if (stat(, &info) != 0){
fprintf(stderr, "stat() error on %s: %s\n",... (2 Replies)
I'm trying to figure out how to support Unicode or atleast an unsigned char in the d_name of struct dirent
The problem i'm facing is that I'm checking file names for special characters and obviously the "char d_name" doesn't like it. I'm looping through the directory and getting the file... (3 Replies)
Hello world,
I just learnt we can create a directory with custom size in a Linux server (say Redhat). Is it true? I'm asking because the only data (I can think of) a directory's inode holds is the files and 'sub-dir's. How can a new empty directory be of some required size? :wall:
PS : In... (2 Replies)