Added cmp and readlink applets from Matt Kraai.

miscutils/readlink.c

@@ -0,0 +1,49 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini readlink implementation for busybox
+ *
+ *
+ * Copyright (C) 2000 by Lineo, inc.
+ * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "busybox.h"
+#include <errno.h>
+#include <unistd.h>
+
+int readlink_main(int argc, char **argv)
+{
+	char *buf = NULL;
+	int bufsize = 128, size = 128;
+
+	if (argc != 2)
+		usage(readlink_usage);
+
+	while (bufsize < size + 1) {
+		bufsize *= 2;
+		buf = xrealloc(buf, bufsize);
+		size = readlink(argv[1], buf, bufsize);
+		if (size == -1)
+			fatalError("%s: %s\n", argv[1], strerror(errno));
+	}
+
+	buf[size] = '\0';
+	puts(buf);
+
+	return EXIT_SUCCESS;
+}