1 files changed, 112 insertions, 0 deletions
diff --git a/lib/libc/gen/readdir-compat11.c b/lib/libc/gen/readdir-compat11.c
new file mode 100644
index 000000000000..606e15bd7b36
--- /dev/null
+++ b/lib/libc/gen/readdir-compat11.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * From: FreeBSD: head/lib/libc/gen/readdir.c 314436 2017-02-28 23:42:47Z imp
+ */
+
+#include "namespace.h"
+#include <sys/param.h>
+#define	_WANT_FREEBSD11_DIRENT
+#include <dirent.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include "un-namespace.h"
+
+#include "libc_private.h"
+#include "gen-private.h"
+#include "telldir.h"
+
+#include "gen-compat.h"
+
+static bool
+freebsd11_cvtdirent(struct freebsd11_dirent *dstdp, struct dirent *srcdp)
+{
+
+	if (srcdp->d_namlen >= sizeof(dstdp->d_name))
+		return (false);
+	dstdp->d_type = srcdp->d_type;
+	dstdp->d_namlen = srcdp->d_namlen;
+	dstdp->d_fileno = srcdp->d_fileno;		/* truncate */
+	dstdp->d_reclen = FREEBSD11_DIRSIZ(dstdp);
+	bcopy(srcdp->d_name, dstdp->d_name, dstdp->d_namlen);
+	bzero(dstdp->d_name + dstdp->d_namlen,
+	    dstdp->d_reclen - offsetof(struct freebsd11_dirent, d_name) -
+	    dstdp->d_namlen);
+	return (true);
+}
+
+struct freebsd11_dirent *
+freebsd11_readdir(DIR *dirp)
+{
+	struct freebsd11_dirent *dstdp;
+	struct dirent *dp;
+
+	if (__isthreaded)
+		_pthread_mutex_lock(&dirp->dd_lock);
+	dp = _readdir_unlocked(dirp, RDU_SKIP);
+	if (dp != NULL) {
+		if (dirp->dd_compat_de == NULL)
+			dirp->dd_compat_de = malloc(sizeof(struct
+			    freebsd11_dirent));
+		if (freebsd11_cvtdirent(dirp->dd_compat_de, dp))
+			dstdp = dirp->dd_compat_de;
+		else
+			dstdp = NULL;
+	} else
+		dstdp = NULL;
+	if (__isthreaded)
+		_pthread_mutex_unlock(&dirp->dd_lock);
+
+	return (dstdp);
+}
+
+int
+freebsd11_readdir_r(DIR *dirp, struct freebsd11_dirent *entry,
+    struct freebsd11_dirent **result)
+{
+	struct dirent xentry, *xresult;
+	int error;
+
+	error = __readdir_r(dirp, &xentry, &xresult);
+	if (error != 0)
+		return (error);
+	if (xresult != NULL) {
+		if (freebsd11_cvtdirent(entry, &xentry))
+			*result = entry;
+		else /* should not happen due to RDU_SHORT */
+			*result = NULL;
+	} else
+		*result = NULL;
+	return (0);
+}
+
+__sym_compat(readdir, freebsd11_readdir, FBSD_1.0);
+__sym_compat(readdir_r, freebsd11_readdir_r, FBSD_1.0);