libc: Add fdopendir()

2 files changed, 16 insertions, 1 deletions

diff --git a/include/dirent.h b/include/dirent.h
index b986ddb..dcd7f59 100644
--- a/include/dirent.h
+++ b/include/dirent.h
@@ -22,6 +22,7 @@ typedef struct {
 
 #ifndef KERNEL
 DIR *opendir(const char *dirname);
+DIR *fdopendir(int fd);
 struct dirent *readdir(DIR *dir);
 int closedir(DIR *dirp);
 int alphasort(const struct dirent **d1, const struct dirent **d2);
diff --git a/userland/libc/dirent/opendir.c b/userland/libc/dirent/opendir.c
index 7bfa562..efe8b6d 100644
--- a/userland/libc/dirent/opendir.c
+++ b/userland/libc/dirent/opendir.c
@@ -1,10 +1,24 @@
 #include <dirent.h>
 
+DIR *fdopendir(int fd) {
+  DIR *rc = malloc(sizeof(DIR));
+  if (!rc) {
+    return NULL;
+  }
+  rc->fd = fd;
+  rc->dir_num = 0;
+  return rc;
+}
+
 DIR *opendir(const char *dirname) {
   int fd = open(dirname, O_RDONLY, 0);
-  if (-1 == fd)
+  if (-1 == fd) {
     return NULL;
+  }
   DIR *rc = malloc(sizeof(DIR));
+  if (!rc) {
+    return NULL;
+  }
   rc->fd = fd;
   rc->dir_num = 0;
   return rc;