summaryrefslogtreecommitdiff
path: root/libc/misc/dirent/readdir64_r.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc/misc/dirent/readdir64_r.c')
-rw-r--r--libc/misc/dirent/readdir64_r.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/libc/misc/dirent/readdir64_r.c b/libc/misc/dirent/readdir64_r.c
new file mode 100644
index 000000000..6735db8d8
--- /dev/null
+++ b/libc/misc/dirent/readdir64_r.c
@@ -0,0 +1,79 @@
+#include <features.h>
+#ifdef __UCLIBC_HAVE_LFS__
+#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS != 64
+#undef _FILE_OFFSET_BITS
+#define _FILE_OFFSET_BITS 64
+#endif
+#ifndef __USE_LARGEFILE64
+# define __USE_LARGEFILE64 1
+#endif
+/* We absolutely do _NOT_ want interfaces silently
+ * renamed under us or very bad things will happen... */
+#ifdef __USE_FILE_OFFSET64
+# undef __USE_FILE_OFFSET64
+#endif
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include "dirstream.h"
+
+extern int getdents64 __P ((unsigned int fd, struct dirent64 *dirp, unsigned int count));
+
+
+int readdir64_r(DIR *dir, struct dirent64 *entry, struct dirent64 **result)
+{
+ int ret;
+ ssize_t bytes;
+ struct dirent64 *de;
+
+ if (!dir) {
+ __set_errno(EBADF);
+ return(EBADF);
+ }
+ de = NULL;
+
+#ifdef __UCLIBC_HAS_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 = getdents64(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 dirent64 *) (((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 __UCLIBC_HAS_THREADS__
+ pthread_mutex_unlock(&(dir->dd_lock));
+#endif
+ return((de != NULL)? 0 : ret);
+}
+#endif /* __UCLIBC_HAVE_LFS__ */
+