BSD 4.4 Lite Lib Sources

1 files changed, 72 insertions, 0 deletions

diff --git a/lib/libc/gen/readdir.c b/lib/libc/gen/readdir.c
new file mode 100644
index 0000000..d0651da
--- /dev/null
+++ b/lib/libc/gen/readdir.c
@@ -0,0 +1,72 @@
+/*
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)readdir.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <dirent.h>
+
+/*
+ * get next entry in a directory.
+ */
+struct dirent *
+readdir(dirp)
+	register DIR *dirp;
+{
+	register struct dirent *dp;
+
+	for (;;) {
+		if (dirp->dd_loc == 0) {
+			dirp->dd_size = getdirentries(dirp->dd_fd,
+			    dirp->dd_buf, dirp->dd_len, &dirp->dd_seek);
+			if (dirp->dd_size <= 0)
+				return NULL;
+		}
+		if (dirp->dd_loc >= dirp->dd_size) {
+			dirp->dd_loc = 0;
+			continue;
+		}
+		dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
+		if ((int)dp & 03)	/* bogus pointer check */
+			return NULL;
+		if (dp->d_reclen <= 0 ||
+		    dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc)
+			return NULL;
+		dirp->dd_loc += dp->d_reclen;
+		if (dp->d_ino == 0)
+			continue;
+		return (dp);
+	}
+}