tests: add mknodat.test

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

tests/.gitignore

@@ -108,6 +108,7 @@ mincore
 mkdir
 mkdirat
 mknod
+mknodat
 mlock2
 mlockall
 mmap

tests/Makefile.am

@@ -160,6 +160,7 @@ check_PROGRAMS = \
 	mkdir \
 	mkdirat \
 	mknod \
+	mknodat \
 	mlock2 \
 	mlockall \
 	mmap \
@@ -420,6 +421,7 @@ DECODER_TESTS = \
 	mkdir.test \
 	mkdirat.test \
 	mknod.test \
+	mknodat.test \
 	mlock2.test \
 	mlockall.test \
 	mmap.test \

tests/mknodat.c

@@ -0,0 +1,41 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_mknodat
+
+# include <stdio.h>
+# include <sys/stat.h>
+# include <unistd.h>
+
+# ifdef MAJOR_IN_SYSMACROS
+#  include <sys/sysmacros.h>
+# endif
+# ifdef MAJOR_IN_MKDEV
+#  include <sys/mkdev.h>
+# endif
+
+int
+main(void)
+{
+	static const char sample[] = "mknokat_sample";
+	const long int fd = (long int) 0xdeadbeefffffffff;
+	long rc = syscall(__NR_mknodat, fd, sample, S_IFREG|0600, 0);
+	printf("mknodat(%d, \"%s\", S_IFREG|0600) = %ld %s (%m)\n",
+	       (int) fd, sample, rc, errno2name());
+
+	const unsigned long dev =
+		(unsigned long) 0xdeadbeef00000000 | makedev(1, 7);
+
+	rc = syscall(__NR_mknodat, fd, sample, S_IFCHR | 0400, dev);
+	printf("mknodat(%d, \"%s\", S_IFCHR|0400, makedev(1, 7)) = %ld %s (%m)\n",
+	       (int) fd, sample, rc, errno2name());
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_mknodat")
+
+#endif

tests/mknodat.test

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