tests: add struct_flock.test

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

tests/.gitignore

@@ -58,6 +58,7 @@ stack-fcall
 stat
 stat32
 statfs
+struct_flock
 sysinfo
 time
 timer_create

tests/Makefile.am

@@ -71,6 +71,7 @@ check_PROGRAMS = \
 	stat \
 	stat32 \
 	statfs \
+	struct_flock \
 	sysinfo \
 	time \
 	timer_create \
@@ -155,6 +156,7 @@ TESTS = \
 	stat32-v.test \
 	stat64-v.test \
 	statfs.test \
+	struct_flock.test \
 	sysinfo.test \
 	membarrier.test \
 	memfd_create.test \

tests/struct_flock.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include "flock.h"
+
+#define FILE_LEN 4096
+
+static void
+test_flock(int nr, const char *name)
+{
+	struct_kernel_flock fl = {
+		.l_type = F_RDLCK,
+		.l_start = (off_t) 0xdefaced1facefeed,
+		.l_len = (off_t) 0xdefaced2cafef00d
+	};
+	int rc;
+
+	syscall(nr, -1, F_SETLK, &fl);
+	printf("%s(-1, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
+	       ", l_start=%jd, l_len=%jd}) = -1 %s\n",
+	       name, (intmax_t) fl.l_start, (intmax_t) fl.l_len,
+	       errno == EBADF ? "EBADF (Bad file descriptor)" :
+				"EINVAL (Invalid argument)");
+
+	fl.l_start = 0;
+	fl.l_len = FILE_LEN;
+
+	rc = syscall(nr, 0, F_SETLK, &fl);
+	printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d}) = %s\n",
+	       name, FILE_LEN, rc ? "-1 EINVAL (Invalid argument)" : "0");
+
+	if (rc)
+		return;
+
+	syscall(nr, 0, F_GETLK, &fl);
+	printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d, l_pid=0}) = 0\n", name, FILE_LEN);
+
+	syscall(nr, 0, F_SETLK, &fl);
+	printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d}) = 0\n", name, FILE_LEN);
+
+}
+
+static void
+test_flock64(int nr, const char *name)
+{
+	struct_kernel_flock64 fl = {
+		.l_type = F_RDLCK,
+		.l_start = 0xdefaced1facefeed,
+		.l_len = 0xdefaced2cafef00d
+	};
+	int rc;
+
+	syscall(nr, -1, F_SETLK64, &fl);
+	printf("%s(-1, F_SETLK64, {l_type=F_RDLCK, l_whence=SEEK_SET"
+	       ", l_start=%jd, l_len=%jd}) = -1 %s\n",
+	       name, (intmax_t) fl.l_start, (intmax_t) fl.l_len,
+	       errno == EBADF ? "EBADF (Bad file descriptor)" :
+				"EINVAL (Invalid argument)");
+
+	fl.l_start = 0;
+	fl.l_len = FILE_LEN;
+
+	rc = syscall(nr, 0, F_SETLK64, &fl);
+	printf("%s(0, F_SETLK64, {l_type=F_RDLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d}) = %s\n",
+	       name, FILE_LEN, rc ? "-1 EINVAL (Invalid argument)" : "0");
+
+	if (rc)
+		return;
+
+	syscall(nr, 0, F_GETLK64, &fl);
+	printf("%s(0, F_GETLK64, {l_type=F_UNLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d, l_pid=0}) = 0\n", name, FILE_LEN);
+
+	syscall(nr, 0, F_SETLK64, &fl);
+	printf("%s(0, F_SETLK64, {l_type=F_UNLCK, l_whence=SEEK_SET"
+	       ", l_start=0, l_len=%d}) = 0\n", name, FILE_LEN);
+}
+
+int
+main(void)
+{
+	char fname[] = "struct_flock_XXXXXX";
+
+	(void) close(0);
+	assert(mkstemp(fname) == 0);
+	assert(unlink(fname) == 0);
+	assert(ftruncate(0, FILE_LEN) == 0);
+
+#ifdef __NR_fcntl
+	test_flock(__NR_fcntl, "fcntl");
+	test_flock64(__NR_fcntl, "fcntl");
+#endif
+#ifdef __NR_fcntl64
+	test_flock(__NR_fcntl64, "fcntl64");
+	test_flock64(__NR_fcntl64, "fcntl64");
+#endif
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}

tests/struct_flock.test

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Check struct flock and struct flock64 decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+syscalls=
+for n in fcntl fcntl64; do
+	$STRACE -e$n -h > /dev/null && syscalls=$syscalls,$n
+done
+run_strace -e trace=$syscalls $args > "$OUT"
+match_diff "$OUT" "$LOG"
+rm -f "$OUT"
+
+exit 0