tests: extend test coverage of getresuid syscall

* tests/getresugid.c: New file.
* tests/getresuid.c: New file.
* tests/getresuid.test: New test.
* tests/.gitignore: Add getresuid.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add getresuid.test.
(EXTRA_DIST): Add getresugid.c.

tests/.gitignore

@@ -62,6 +62,7 @@ getdents64
 getgroups
 getgroups32
 getrandom
+getresuid
 getrusage
 getxxid
 inet-cmsg

tests/Makefile.am

@@ -114,6 +114,7 @@ check_PROGRAMS = \
 	getgroups \
 	getgroups32 \
 	getrandom \
+	getresuid \
 	getrusage \
 	getxxid \
 	inet-cmsg \
@@ -350,6 +351,7 @@ DECODER_TESTS = \
 	getgroups.test \
 	getgroups32.test \
 	getrandom.test \
+	getresuid.test \
 	getrusage.test \
 	getxxid.test \
 	inet-cmsg.test \
@@ -540,6 +542,7 @@ EXTRA_DIST = init.sh run.sh match.awk \
 	     filter-unavailable.expected \
 	     fstatat.c \
 	     fstatx.c \
+	     getresugid.c \
 	     ip_mreq.expected \
 	     ipc.sh \
 	     ipc_msgbuf.expected \

tests/getresugid.c

@@ -0,0 +1,60 @@
+/*
+ * Check decoding of getresuid/getresgid/getresuid32/getresgid32 syscalls.
+ *
+ * Copyright (c) 2016 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.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	unsigned UGID_TYPE *const r = tail_alloc(sizeof(*r));
+	unsigned UGID_TYPE *const e = tail_alloc(sizeof(*e));
+	unsigned UGID_TYPE *const s = tail_alloc(sizeof(*s));
+	(void) tail_alloc(1);
+
+	if (syscall(SYSCALL_NR, r, e, s))
+		perror_msg_and_fail(SYSCALL_NAME);
+
+	printf("%s([%u], [%u], [%u]) = 0\n", SYSCALL_NAME,
+	       (unsigned) *r, (unsigned) *e, (unsigned) *s);
+
+	assert(syscall(SYSCALL_NR, NULL, e, s) == -1);
+	printf("%s(NULL, %p, %p) = -1 EFAULT (%m)\n", SYSCALL_NAME, e, s);
+
+	assert(syscall(SYSCALL_NR, r, NULL, s) == -1);
+	printf("%s(%p, NULL, %p) = -1 EFAULT (%m)\n", SYSCALL_NAME, r, s);
+
+	assert(syscall(SYSCALL_NR, r, e, NULL) == -1);
+	printf("%s(%p, %p, NULL) = -1 EFAULT (%m)\n", SYSCALL_NAME, r, e);
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}

tests/getresuid.c

@@ -0,0 +1,21 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_getresuid
+
+# define SYSCALL_NR	__NR_getresuid
+# define SYSCALL_NAME	"getresuid"
+
+# if defined __NR_getresuid32 && __NR_getresuid != __NR_getresuid32
+#  define UGID_TYPE	short
+# else
+#  define UGID_TYPE	int
+# endif
+
+# include "getresugid.c"
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_getresuid")
+
+#endif

tests/getresuid.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check getresuid syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -a25