tests: add mknod.test

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

tests/.gitignore

@@ -65,6 +65,7 @@ lstat64
 membarrier
 memfd_create
 mincore
+mknod
 mlock2
 mmap
 mmap64

tests/Makefile.am

@@ -114,6 +114,7 @@ check_PROGRAMS = \
 	membarrier \
 	memfd_create \
 	mincore \
+	mknod \
 	mlock2 \
 	mmap \
 	mmap64 \
@@ -282,6 +283,7 @@ DECODER_TESTS = \
 	membarrier.test \
 	memfd_create.test \
 	mincore.test \
+	mknod.test \
 	mlock2.test \
 	mmap.test \
 	mmap64.test \

tests/mknod.c

@@ -0,0 +1,29 @@
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_mknod
+
+# include <errno.h>
+# include <stdio.h>
+# include <sys/stat.h>
+# include <unistd.h>
+
+# define TMP_FILE "mknod"
+
+int
+main(void)
+{
+	int rc = syscall(__NR_mknod, TMP_FILE, S_IFREG|0600, 0);
+	printf("mknod(\"%s\", S_IFREG|0600) = %d %s (%m)\n",
+	       TMP_FILE, rc,
+	       errno == ENOSYS ? "ENOSYS" : "EEXIST");
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_mknod")
+
+#endif

tests/mknod.test

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# Check mknod syscall decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -emknod -a29 $args > "$OUT"
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"