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/*
* readdir.c: opendir/readdir/closedir
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#define __KLIBC_DIRENT_INTERNALS
#include <dirent.h>
DIR *fdopendir(int fd)
{
DIR *dp = zalloc(sizeof(DIR));
if (!dp)
return NULL;
dp->__fd = fd;
return dp;
}
DIR *opendir(const char *name)
{
int fd, err;
DIR *dp;
fd = open(name, O_DIRECTORY | O_RDONLY);
if (fd < 0)
return NULL;
dp = fdopendir(fd);
if (!dp) {
err = errno;
close(fd);
errno = err;
}
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;
dir->next = (struct dirent *)((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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