tests: add chmod.test

* tests/chmod.c: New file.
* tests/chmod.test: New test.
* tests/.gitignore: Add chmod.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add chmod.test.

tests/.gitignore

@@ -14,6 +14,7 @@ attach-p-cmd-cmd
 attach-p-cmd-p
 bpf
 caps
+chmod
 clock_nanosleep
 clock_xettime
 copy_file_range

tests/Makefile.am

@@ -64,6 +64,7 @@ check_PROGRAMS = \
 	attach-p-cmd-p \
 	bpf \
 	caps \
+	chmod \
 	clock_nanosleep \
 	clock_xettime \
 	copy_file_range \
@@ -226,6 +227,7 @@ TESTS = \
 	bexecve.test \
 	bpf.test \
 	caps.test \
+	chmod.test \
 	clock_nanosleep.test \
 	clock_xettime.test \
 	copy_file_range.test \

tests/chmod.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2016 Anchit Jain <anchitjain1234@gmail.com>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 "tests.h"
+#include <sys/syscall.h>
+
+#if defined __NR_chmod
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+int
+main(void)
+{
+	static const char fname[] = "chmod_test_file";
+
+	if (open(fname, O_CREAT|O_RDONLY, 0400) == -1)
+		perror_msg_and_fail("open");
+
+	int chmod_res = syscall(__NR_chmod, fname, 0600);
+
+	if (chmod_res == 0) {
+		printf("chmod(\"%s\", 0600) = 0\n", fname);
+	} else {
+		if (errno == ENOSYS) {
+			printf("chmod(\"%s\", 0600) = -1 ENOSYS (%m)\n", fname);
+		} else {
+			perror_msg_and_fail("chmod");
+		}
+	}
+
+	if (unlink(fname) == -1)
+		perror_msg_and_fail("unlink");
+
+	if (chmod_res == 0) {
+		if (syscall(__NR_chmod, fname, 0600) != -1)
+			perror_msg_and_fail("chmod");
+
+		printf("chmod(\"%s\", 0600) = -1 ENOENT (%m)\n", fname);
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_chmod")
+
+#endif

tests/chmod.test

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Check chmod syscall decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -a28 -echmod $args > "$OUT"
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"
+
+exit 0