basic implementation of POSIX (not XOPEN) dirent functions

1 files changed, 27 insertions, 3 deletions

diff --git a/src/dirent/opendir.c b/src/dirent/opendir.c
index 3e1d1c87..98a5df54 100644
--- a/src/dirent/opendir.c
+++ b/src/dirent/opendir.c
@@ -1,10 +1,34 @@
 #include <dirent.h>
-#include "stddef.h"
+#include "errno.h"
+#include "sys/types.h"
+#include "stdlib.h"
+#include "fcntl.h"
+#include "_dirent.h"
+
+#ifndef O_DIRECTORY
+#define O_DIRECTORY O_RDONLY
+#endif
+
+#ifndef O_SEARCH
+#define O_SEARCH O_RDONLY
+#endif
 
 DIR * opendir(const char * dirname)
 {
-	(void)dirname;
-	return NULL;
+	DIR *dir = malloc(sizeof(*dir));
+	if (dir == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	dir->fd = open(dirname, O_DIRECTORY | O_SEARCH);
+	if (dir->fd == -1) {
+		free(dir);
+		return NULL;
+	}
+	fcntl(dir->fd, F_SETFD, FD_CLOEXEC);
+
+	return dir;
 }
 
 /*