1 files changed, 72 insertions, 0 deletions
diff --git a/release/src/router/busybox/coreutils/readlink.c b/release/src/router/busybox/coreutils/readlink.c
new file mode 100644
index 00000000..bcf352e7
--- /dev/null
+++ b/release/src/router/busybox/coreutils/readlink.c
@@ -0,0 +1,72 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini readlink implementation for busybox
+ *
+ * Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ *
+ * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
+ */
+#include "libbb.h"
+
+/*
+ * # readlink --version
+ * readlink (GNU coreutils) 6.10
+ * # readlink --help
+ *   -f, --canonicalize
+ *      canonicalize by following every symlink in
+ *      every component of the given name recursively;
+ *      all but the last component must exist
+ *   -e, --canonicalize-existing
+ *      canonicalize by following every symlink in
+ *      every component of the given name recursively,
+ *      all components must exist
+ *   -m, --canonicalize-missing
+ *      canonicalize by following every symlink in
+ *      every component of the given name recursively,
+ *      without requirements on components existence
+ *   -n, --no-newline              do not output the trailing newline
+ *   -q, --quiet, -s, --silent     suppress most error messages
+ *   -v, --verbose                 report error messages
+ *
+ * bbox supports: -f -n -v (fully), -q -s (accepts but ignores)
+ */
+
+int readlink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int readlink_main(int argc UNUSED_PARAM, char **argv)
+{
+	char *buf;
+	char *fname;
+	char pathbuf[PATH_MAX];
+
+	USE_FEATURE_READLINK_FOLLOW(
+		unsigned opt;
+		/* We need exactly one non-option argument.  */
+		opt_complementary = "=1";
+		opt = getopt32(argv, "fnvsq");
+		fname = argv[optind];
+	)
+	SKIP_FEATURE_READLINK_FOLLOW(
+		const unsigned opt = 0;
+		if (argc != 2) bb_show_usage();
+		fname = argv[1];
+	)
+
+	/* compat: coreutils readlink reports errors silently via exit code */
+	if (!(opt & 4)) /* not -v */
+		logmode = LOGMODE_NONE;
+
+	if (opt & 1) { /* -f */
+		buf = realpath(fname, pathbuf);
+	} else {
+		buf = xmalloc_readlink_or_warn(fname);
+	}
+
+	if (!buf)
+		return EXIT_FAILURE;
+	printf((opt & 2) ? "%s" : "%s\n", buf);
+
+	if (ENABLE_FEATURE_CLEAN_UP && !opt)
+		free(buf);
+
+	fflush_stdout_and_exit(EXIT_SUCCESS);
+}