tests: check printing of block/char device numbers in -yy mode

* tests/dev-yy.c: New file.
* tests/pure_executables.list: Add dev-yy.
* tests/.gitignore: Likewise.
* tests/gen_tests.in (dev-yy): New test.

4 files changed, 104 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
index 430adca4e..dd0c8e12a 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -40,6 +40,7 @@ copy_file_range
 count-f
 creat
 delete_module
+dev-yy
 dup
 dup2
 dup3
diff --git a/tests/dev-yy.c b/tests/dev-yy.c
new file mode 100644
index 000000000..58a1e414f
--- /dev/null
+++ b/tests/dev-yy.c
@@ -0,0 +1,101 @@
+/*
+ * Check printing of character/block device numbers in -yy mode.
+ *
+ * Copyright (c) 2018 The strace developers.
+ * 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 "tests.h"
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include <asm/unistd.h>
+
+#include <linux/fcntl.h>
+
+#include <sys/sysmacros.h>
+
+#if defined __NR_openat && defined O_PATH
+
+int
+main(void)
+{
+	static const struct {
+		const char *path;
+		unsigned int major;
+		unsigned int minor;
+		bool blk;
+		bool optional;
+	} checks[] = {
+		{ "/dev/zero", 1, 5, false, false },
+		{ "/dev/full", 1, 7, false, false },
+		{ "/dev/sda",  8, 0, true,  true  },
+	};
+
+	for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) {
+		/*
+		 * We can't have nice things here and call openat() directly as
+		 * some libcs (yes, musl, I'm looking at you now) are too
+		 * frivolous in passing flags to the kernel.
+		 */
+		long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path,
+				  O_RDONLY|O_PATH);
+
+		printf("openat(AT_FDCWD, \"%s\", O_RDONLY|O_PATH) = %s",
+		       checks[i].path, sprintrc(fd));
+		if (fd >= 0)
+			printf("<%s<%s %u:%u>>",
+			       checks[i].path,
+			       checks[i].blk ? "block" : "char",
+			       checks[i].major, checks[i].minor);
+		puts("");
+
+		if (fd < 0) {
+			if (checks[i].optional)
+				continue;
+			else
+				perror_msg_and_fail("openat(\"%s\")",
+						    checks[i].path);
+		}
+
+		int rc = fsync(fd);
+
+		printf("fsync(%ld<%s<%s %u:%u>>) = %s\n",
+		       fd, checks[i].path, checks[i].blk ? "block" : "char",
+		       checks[i].major, checks[i].minor, sprintrc(rc));
+
+		close(fd);
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_openat && O_PATH")
+
+#endif
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index 6215e3dd5..55cc98def 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -49,6 +49,7 @@ clock_xettime	-a36 -e trace=clock_getres,clock_gettime,clock_settime
 copy_file_range
 creat	-a20
 delete_module	-a23
+dev-yy	-a30 -e trace=openat,fsync -P "/dev/full" -P "/dev/zero" -P "/dev/sda" -yy
 dup	-a8
 dup2	-a13
 dup3	-a24
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index bf5f694ce..18b5f1d8b 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -23,6 +23,7 @@ clock_xettime
 copy_file_range
 creat
 delete_module
+dev-yy
 dup
 dup2
 dup3