[PATCH v3] tests: add fchmod.test

[Fabien Siron]

* tests/fchmod.c: New file.
* tests/fchmod.test: New test.
* tests/.gitignore: Add fchmod.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add fchmod.test.
---
 tests/.gitignore  |  1 +
 tests/Makefile.am |  2 ++
 tests/fchmod.c    | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/fchmod.test | 11 ++++++++
 4 files changed, 94 insertions(+)
 create mode 100644 tests/fchmod.c
 create mode 100755 tests/fchmod.test

diff --git a/tests/.gitignore b/tests/.gitignore
index c6a94d8..f212fde 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -25,6 +25,7 @@ execve-v
 execveat
 execveat-v
 fanotify_mark
+fchmod
 fcntl
 fcntl64
 file_handle
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 92d3255..81b56e8 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -75,6 +75,7 @@ check_PROGRAMS = \
 	execveat \
 	execveat-v \
 	fanotify_mark \
+	fchmod \
 	fcntl \
 	fcntl64 \
 	file_handle \
@@ -239,6 +240,7 @@ TESTS = \
 	execveat.test \
 	execveat-v.test \
 	fanotify_mark.test \
+	fchmod.test \
 	fcntl.test \
 	fcntl64.test \
 	file_handle.test \
diff --git a/tests/fchmod.c b/tests/fchmod.c
new file mode 100644
index 0000000..93e176a
--- /dev/null
+++ b/tests/fchmod.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016 Fabien Siron <fabien.siron at epita.fr>
+ * 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_fchmod
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+int
+main(void)
+{
+	static const char fname[] = "fchmod_test_file";
+
+	int fd = open(fname, O_CREAT|O_RDONLY, 0400);
+
+	if (fd == -1)
+		perror_msg_and_fail("open");
+
+	if (unlink(fname) == -1)
+		perror_msg_and_fail("unlink");
+
+	int fchmod_res = syscall(__NR_fchmod, fd, 0600);
+
+	close(fd);
+
+	if (fchmod_res == 0) {
+		printf("fchmod(%d, 0600) = 0\n", fd);
+
+		if (syscall(__NR_fchmod, fd, 0600) != -1)
+			perror_msg_and_fail("fchmod");
+
+		printf("fchmod(%d, 0600) = -1 EBADF (Bad file descriptor)\n",
+		       fd);
+	} else {
+		if (errno == ENOSYS) {
+			printf("fchmod(%d, 0600) = -1 ENOSYS (%m)\n", fd);
+		} else {
+			perror_msg_and_fail("fchmod");
+		}
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_fchmod")
+
+#endif
diff --git a/tests/fchmod.test b/tests/fchmod.test
new file mode 100755
index 0000000..931d727
--- /dev/null
+++ b/tests/fchmod.test
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -a16 -efchmod $args > "$OUT"
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"
+
+exit 0
-- 
2.7.1