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Diffstat (limited to 'libc/misc/dirent/readdir_r.c')
-rw-r--r--libc/misc/dirent/readdir_r.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libc/misc/dirent/readdir_r.c b/libc/misc/dirent/readdir_r.c
new file mode 100644
index 000000000..9d9db0dee
--- /dev/null
+++ b/libc/misc/dirent/readdir_r.c
@@ -0,0 +1,63 @@
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include "dirstream.h"
+
+extern int getdents __P ((unsigned int fd, struct dirent *dirp, unsigned int count));
+
+
+int readdir_r(DIR *dir, struct dirent *entry, struct dirent **result)
+{
+ int ret;
+ ssize_t bytes;
+ struct dirent *de;
+
+ if (!dir) {
+ __set_errno(EBADF);
+ return(EBADF);
+ }
+ de = NULL;
+
+#ifdef _POSIX_THREADS
+ pthread_mutex_lock(dir->dd_lock);
+#endif
+
+ do {
+ if (dir->dd_size <= dir->dd_nextloc) {
+ /* read dir->dd_max bytes of directory entries. */
+ bytes = getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
+ if (bytes <= 0) {
+ *result = NULL;
+ ret = errno;
+ goto all_done;
+ }
+ dir->dd_size = bytes;
+ dir->dd_nextloc = 0;
+ }
+
+ de = (struct dirent *) (((char *) dir->dd_buf) + dir->dd_nextloc);
+
+ /* Am I right? H.J. */
+ dir->dd_nextloc += de->d_reclen;
+
+ /* We have to save the next offset here. */
+ dir->dd_nextoff = de->d_off;
+ /* Skip deleted files. */
+ } while (de->d_ino == 0);
+
+ if (de == NULL) {
+ *result = NULL;
+ } else {
+ *result = memcpy (entry, de, de->d_reclen);
+ }
+ ret = 0;
+
+all_done:
+
+#ifdef _POSIX_THREADS
+ pthread_mutex_unlock(dir->dd_lock);
+#endif
+ return((de != NULL)? 0 : ret);
+}