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/*
* opendir/readdir/closedir
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/dirent.h>
#include <stdio.h>
#define __IO_DIR_DEFINED
struct _IO_dir {
int fd;
size_t bytes_left;
struct dirent *next;
struct dirent buffer[15]; /* 15 times max dirent size =~ 4K */
};
#include <dirent.h>
DIR *opendir(const char *name)
{
DIR *dp = malloc(sizeof(DIR));
if ( !dp )
return NULL;
dp->fd = open(name, O_DIRECTORY|O_RDONLY);
if ( dp->fd < 0 ) {
free(dp);
return NULL;
}
dp->bytes_left = 0;
return dp;
}
struct dirent *readdir(DIR *dir)
{
struct dirent *dent;
int rv;
if ( !dir->bytes_left ) {
rv = getdents(dir->fd, dir->buffer, sizeof(dir->buffer));
if ( rv <= 0 )
return NULL;
dir->bytes_left = rv;
dir->next = dir->buffer;
}
dent = dir->next;
((char *)dir->next) += dent->d_reclen;
dir->bytes_left -= dent->d_reclen;
return dent;
}
int closedir(DIR *dir)
{
int rv;
rv = close(dir->fd);
free(dir);
return rv;
}
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