lib/efi: Add new routines to access efi variables

[petitboot] / test / lib / test-efivar.c

diff --git a/test/lib/test-efivar.c b/test/lib/test-efivar.c
new file mode 100644 (file)
index 0000000..8ceb8f5
--- /dev/null
+++ b/test/lib/test-efivar.c
@@ -0,0 +1,127 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Copyright (C) 2018 Huaxintong Semiconductor Technology Co.,Ltd. All rights
+ *  reserved.
+ *  Author: Ge Song <ge.song@hxt-semitech.com>
+ */
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+#include <unistd.h>
+
+#include "efi/efivar.h"
+#include "talloc/talloc.h"
+
+#define DEF_ATTR       (EFI_VARIABLE_NON_VOLATILE | \
+       EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)
+
+static const char *test_efivar_guid = "c9c07add-256e-4452-b911-f8d0d35a1ac7";
+static const char *test_varname = "efivartest";
+static const char *test_data = "petitboot";
+
+static char* find_efitest_path(void)
+{
+       static char dir[PATH_MAX] = {0};
+       static bool run = false;
+       char *rest_path = "/efivarfs_data/";
+       char *pos = NULL;
+
+       if (run)
+               return dir;
+
+       readlink("/proc/self/exe", dir, PATH_MAX);
+
+       pos = strrchr(dir, '/');
+       *pos = '\0';
+
+       strcat(dir, rest_path);
+       run = true;
+
+       return dir;
+}
+
+static bool probe(void)
+{
+       char *path;
+       int rc;
+
+       path = find_efitest_path();
+
+       rc = access(path, F_OK);
+       if (rc) {
+               if (errno == ENOENT) {
+                       rc = mkdir(path, 0755);
+                       if(rc)
+                               return false;
+               } else {
+                       return false;
+               }
+       }
+
+       set_efivarfs_path(path);
+
+       return true;
+}
+
+int main(void)
+{
+       void *ctx = NULL;
+       int rc, errno_value;
+       size_t size;
+       uint8_t *data = NULL;
+       uint32_t attr = DEF_ATTR;
+       char *path = NULL;
+
+       if(!probe())
+               return ENOENT;
+
+       talloc_new(ctx);
+       size = strlen(test_data) + 1;
+       rc = efi_set_variable(ctx, test_efivar_guid, test_varname,
+                               (uint8_t *)test_data, size, attr);
+
+       rc = efi_get_variable(ctx, test_efivar_guid, test_varname,
+                               &data, &size, &attr);
+
+       assert(data != NULL);
+       rc = strcmp((char *)data, test_data);
+       if (rc) {
+               talloc_free(ctx);
+               assert(0);
+       }
+
+       rc = efi_del_variable(ctx, test_efivar_guid, test_varname);
+
+       rc = efi_get_variable(ctx, test_efivar_guid, test_varname,
+                               &data, &size, &attr);
+
+       errno_value = errno;
+       talloc_free(ctx);
+
+       assert(errno_value == ENOENT);
+
+       path = find_efitest_path();
+       rmdir(path);
+
+       return EXIT_SUCCESS;
+}