[PATCH 3/3] selftests/efivarfs: Add create-read test

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Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx>

---
 tools/testing/selftests/efivarfs/Makefile      |    2 
 tools/testing/selftests/efivarfs/create-read.c |   38 +++++++++++++++++
 tools/testing/selftests/efivarfs/efivarfs.sh   |    7 +++
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/efivarfs/Makefile b/tools/testing/selftests/efivarfs/Makefile
index 1a943ee..b4a7aca 100644
--- a/tools/testing/selftests/efivarfs/Makefile
+++ b/tools/testing/selftests/efivarfs/Makefile
@@ -1,7 +1,7 @@
 CC = $(CROSS_COMPILE)gcc
 CFLAGS = -Wall
 
-test_objs = open-unlink
+test_objs = open-unlink create-read
 
 all: $(test_objs)
 
diff --git a/tools/testing/selftests/efivarfs/create-read.c b/tools/testing/selftests/efivarfs/create-read.c
new file mode 100644
index 0000000..25b6b77
--- /dev/null
+++ b/tools/testing/selftests/efivarfs/create-read.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+	const char *path;
+	char buf[4];
+	int fd, rc;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s <path>\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	path = argv[1];
+
+	/* create a test variable */
+	fd = open(path, O_RDWR | O_CREAT, 0600);
+	if (fd < 0) {
+		perror("open(O_WRONLY)");
+		return EXIT_FAILURE;
+	}
+
+	rc = read(fd, buf, sizeof(buf));
+	if (!(rc < 0 && errno == EIO)) {
+		fprintf(stderr, "Reading a new var should return -EIO\n");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}
diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh
index 3af4b37..880cdd5 100755
--- a/tools/testing/selftests/efivarfs/efivarfs.sh
+++ b/tools/testing/selftests/efivarfs/efivarfs.sh
@@ -70,6 +70,12 @@ test_create_empty()
 	fi
 }
 
+test_create_read()
+{
+	local file=$efivarfs_mount/$FUNCNAME-$test_guid
+	./create-read $file
+}
+
 test_delete()
 {
 	local attrs='\x07\x00\x00\x00'
@@ -125,6 +131,7 @@ rc=0
 
 run_test test_create
 run_test test_create_empty
+run_test test_create_read
 run_test test_delete
 run_test test_zero_size_delete
 run_test test_open_unlink
--
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