Test for proper handling of "cpio -p .."

PR:		bin/124924

usr.bin/cpio/test/Makefile

@@ -27,6 +27,7 @@ TESTS=	\
 	test_option_y.c				\
 	test_option_z.c				\
 	test_owner_parse.c			\
+	test_passthrough_dotdot.c		\
 	test_passthrough_reverse.c		\
 	test_pathmatch.c
 

usr.bin/cpio/test/test_passthrough_dotdot.c

@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 2003-2007 Tim Kientzle
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
+ */
+#include "test.h"
+__FBSDID("$FreeBSD$");
+
+/*
+ * Verify that "cpio -p .." works.
+ */
+
+DEFINE_TEST(test_passthrough_dotdot)
+{
+	struct stat st;
+	int fd, r;
+	int filelist;
+	int oldumask;
+
+	oldumask = umask(0);
+
+	/*
+	 * Create an assortment of files on disk.
+	 */
+	filelist = open("filelist", O_CREAT | O_WRONLY, 0644);
+
+	/* Directory. */
+	assertEqualInt(0, mkdir("dir", 0755));
+	assertEqualInt(0, chdir("dir"));
+
+	/* File with 10 bytes content. */
+	fd = open("file", O_CREAT | O_WRONLY, 0642);
+	assert(fd >= 0);
+	assertEqualInt(10, write(fd, "123456789", 10));
+	close(fd);
+	write(filelist, "file\n", 5);
+
+	/* All done. */
+	close(filelist);
+
+
+	/*
+	 * Use cpio passthrough mode to copy files to another directory.
+	 */
+	r = systemf("%s -pdvm .. <../filelist >../stdout 2>../stderr",
+	    testprog);
+	failure("Error invoking %s -pd ..", testprog);
+	assertEqualInt(r, 0);
+
+	assertEqualInt(0, chdir(".."));
+
+	/* Verify stderr and stdout. */
+	assertFileContents("../file\n", 8, "stderr");
+	assertEmptyFile("stdout");
+
+	/* Regular file. */
+	r = lstat("file", &st);
+	failure("Failed to stat file, errno=%d", errno);
+	assertEqualInt(r, 0);
+	if (r == 0) {
+		assert(S_ISREG(st.st_mode));
+		assertEqualInt(0642, st.st_mode & 0777);
+		assertEqualInt(10, st.st_size);
+		assertEqualInt(1, st.st_nlink);
+	}
+
+	umask(oldumask);
+}