Changeset df4f7c30 in mainline

Timestamp:

2026-03-17T12:37:07Z (27 hours ago)

Author:

Vít Skalický <skalicky@…>

Children:

128a311

Parents:

7c2a3c7

git-author:

Vít Skalický <skalicky@…> (2026-03-16 14:01:00)

git-committer:

Vít Skalický <skalicky@…> (2026-03-17 12:37:07)

Message:

Add opendir_handle() ot dirent.c

Add function to open a directory by its handle instead of pathname to
dirent.c.

Location:

uspace/lib/c

Files:

• generic/dirent.c (modified) (2 diffs)
• include/dirent.h (modified) (1 diff)

uspace/lib/c/generic/dirent.c

@@ -47 +47 @@
 };
 
-/** Open directory.
+/** Open directory by its handle (a.k.a. file descriptor).
+ *
+ * @param handle Directory handle
+ * @return Non-NULL pointer on success. On error returns @c NULL and sets errno.
+ */
+DIR *opendir_handle(int handle)
+{
+        DIR *dirp = malloc(sizeof(DIR));
+        if (!dirp) {
+                errno = ENOMEM;
+                return NULL;
+        }
+
+        errno_t rc = vfs_open(handle, MODE_READ);
+        if (rc != EOK) {
+                free(dirp);
+                errno = rc;
+                return NULL;
+        }
+
+        dirp->fd = handle;
+        dirp->pos = 0;
+        return dirp;
+}
+
+/** Open directory by its pathname.
  *
  * @param dirname Directory pathname
@@ -55 +80 @@
 DIR *opendir(const char *dirname)
 {
-        DIR *dirp = malloc(sizeof(DIR));
-        if (!dirp) {
-                errno = ENOMEM;
-                return NULL;
-        }
-
         int fd;
         errno_t rc = vfs_lookup(dirname, WALK_DIRECTORY, &fd);
         if (rc != EOK) {
-                free(dirp);
                 errno = rc;
                 return NULL;
         }
 
-        rc = vfs_open(fd, MODE_READ);
+        DIR *dirp = opendir_handle(fd);
+        rc = errno;
         if (rc != EOK) {
-                free(dirp);
                 vfs_put(fd);
                 errno = rc;
                 return NULL;
         }
-
-        dirp->fd = fd;
-        dirp->pos = 0;
         return dirp;
 }

uspace/lib/c/include/dirent.h

@@ -46 +46 @@
 typedef struct __dirstream DIR;
 
+extern DIR *opendir_handle(int handle);
 extern DIR *opendir(const char *);
 extern struct dirent *readdir(DIR *);