Imported Debian patch 0.4.9-0.sarge.2

[debian/efibootmgr] / src / lib / efivars_sysfs.c

diff --git a/src/lib/efivars_sysfs.c b/src/lib/efivars_sysfs.c
new file mode 100644 (file)
index 0000000..642c5ad
--- /dev/null
+++ b/src/lib/efivars_sysfs.c
@@ -0,0 +1,120 @@
+/*
+  efivars_sysfs.[ch] - Manipulates EFI variables as exported in /sys/firmware/efi/vars
+
+  Copyright (C) 2001,2003 Dell Computer Corporation <Matt_Domsch@dell.com>
+
+    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; either version 2 of the License, or
+    (at your option) any later version.
+
+    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
+ */
+
+#define _FILE_OFFSET_BITS 64
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "efi.h"
+#include "efichar.h"
+#include "efibootmgr.h"
+#include "efivars_sysfs.h"
+
+static efi_status_t
+sysfs_read_variable(const char *name, efi_variable_t *var)
+{
+       char filename[PATH_MAX];
+       int fd;
+       size_t readsize;
+       char buffer[PATH_MAX+40];
+       if (!name || !var) return EFI_INVALID_PARAMETER;
+       memset(buffer, 0, sizeof(buffer));
+
+       snprintf(filename, PATH_MAX-1, "%s/%s/raw_var", SYSFS_DIR_EFI_VARS,name);
+       fd = open(filename, O_RDONLY);
+       if (fd == -1) {
+               return EFI_NOT_FOUND;
+       }
+       readsize = read(fd, var, sizeof(*var));
+       if (readsize != sizeof(*var)) {
+               close(fd);
+               return EFI_INVALID_PARAMETER;
+       }
+       close(fd);
+       return var->Status;
+}
+
+static efi_status_t
+sysfs_write_variable(const char *filename, efi_variable_t *var)
+{
+       int fd;
+       size_t writesize;
+       char buffer[PATH_MAX+40];
+
+       if (!filename || !var) return EFI_INVALID_PARAMETER;
+       memset(buffer, 0, sizeof(buffer));
+
+       fd = open(filename, O_WRONLY);
+       if (fd == -1) {
+               return EFI_INVALID_PARAMETER;
+       }
+       writesize = write(fd, var, sizeof(*var));
+       if (writesize != sizeof(*var)) {
+               close(fd);
+               return EFI_INVALID_PARAMETER;
+       }
+       close(fd);
+       return EFI_SUCCESS;
+}
+
+
+static efi_status_t
+sysfs_edit_variable(const char *name, efi_variable_t *var)
+{
+       char filename[PATH_MAX];
+       if (!var) return EFI_INVALID_PARAMETER;
+       snprintf(filename, PATH_MAX-1, "%s/%s/raw_var", SYSFS_DIR_EFI_VARS,name);
+       return sysfs_write_variable(filename, var);
+}
+
+static efi_status_t
+sysfs_create_variable(efi_variable_t *var)
+{
+       char filename[PATH_MAX];
+       if (!var) return EFI_INVALID_PARAMETER;
+       snprintf(filename, PATH_MAX-1, "%s/%s", SYSFS_DIR_EFI_VARS,"new_var");
+       return sysfs_write_variable(filename, var);
+}
+
+static efi_status_t
+sysfs_delete_variable(efi_variable_t *var)
+{
+       char filename[PATH_MAX];
+       if (!var) return EFI_INVALID_PARAMETER;
+       snprintf(filename, PATH_MAX-1, "%s/%s", SYSFS_DIR_EFI_VARS,"del_var");
+       return sysfs_write_variable(filename, var);
+}
+
+struct efivar_kernel_calls sysfs_kernel_calls = {
+       .read = sysfs_read_variable,
+       .edit = sysfs_edit_variable,
+       .create = sysfs_create_variable,
+       .delete = sysfs_delete_variable,
+       .path = SYSFS_DIR_EFI_VARS,
+};