tests: check decoding of fchown syscall

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

tests/.gitignore

@@ -40,6 +40,7 @@ faccessat
 fanotify_mark
 fchmod
 fchmodat
+fchown
 fchownat
 fcntl
 fcntl64

tests/Makefile.am

@@ -92,6 +92,7 @@ check_PROGRAMS = \
 	fanotify_mark \
 	fchmod \
 	fchmodat \
+	fchown \
 	fchownat \
 	fcntl \
 	fcntl64 \
@@ -303,6 +304,7 @@ DECODER_TESTS = \
 	fanotify_mark.test \
 	fchmod.test \
 	fchmodat.test \
+	fchown.test \
 	fchownat.test \
 	fcntl.test \
 	fcntl64.test \

tests/fchown.c

@@ -0,0 +1,20 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_fchown
+
+# define SYSCALL_NR __NR_fchown
+# define SYSCALL_NAME "fchown"
+# define ACCESS_BY_DESCRIPTOR
+
+# if defined __NR_fchown32 && __NR_fchown != __NR_fchown32
+#  define UGID_TYPE_IS_SHORT
+# endif
+
+# include "xchownx.c"
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_fchown")
+
+#endif

tests/fchown.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check fchown syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -a16