Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / testing / selftests / efivarfs / create-read.c

diff --git a/kernel/tools/testing/selftests/efivarfs/create-read.c b/kernel/tools/testing/selftests/efivarfs/create-read.c
new file mode 100644 (file)
index 0000000..7feef18
--- /dev/null
+++ b/kernel/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) {
+               fprintf(stderr, "Reading a new var should return EOF\n");
+               return EXIT_FAILURE;
+       }
+
+       return EXIT_SUCCESS;
+}