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authorLennart Poettering <lennart@poettering.net>2013-01-21 01:02:53 +0100
committerLennart Poettering <lennart@poettering.net>2013-01-21 01:04:16 +0100
commitf4ce2b3e5ce93b83f14f8785e205ebb5a9b8c1df (patch)
tree144cbcadc5d1dc8fe0e15952d68bc19e4270de95 /src/efi-boot-generator/efi-boot-generator.c
parent34e5a31ec5897de8ba1436dad53df99637569d0a (diff)
efi: add efi boot generator that automatically mounts the ESP to /boot
Diffstat (limited to 'src/efi-boot-generator/efi-boot-generator.c')
-rw-r--r--src/efi-boot-generator/efi-boot-generator.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/efi-boot-generator/efi-boot-generator.c b/src/efi-boot-generator/efi-boot-generator.c
new file mode 100644
index 0000000000..ee6ec31c0e
--- /dev/null
+++ b/src/efi-boot-generator/efi-boot-generator.c
@@ -0,0 +1,117 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "efivars.h"
+#include "path-util.h"
+#include "util.h"
+
+static const char *arg_dest = NULL;
+
+int main(int argc, char *argv[]) {
+ int r = EXIT_SUCCESS;
+ sd_id128_t id;
+ _cleanup_free_ char *name = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+
+ if (argc > 1 && argc != 4) {
+ log_error("This program takes three or no arguments.");
+ return EXIT_FAILURE;
+ }
+
+ if (argc > 1)
+ arg_dest = argv[3];
+
+ log_set_target(LOG_TARGET_SAFE);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ if (!is_efiboot())
+ return EXIT_SUCCESS;
+
+ if (dir_is_empty("/boot") <= 0)
+ return EXIT_SUCCESS;
+
+ r = efi_get_loader_device_part_uuid(&id);
+ if (r == -ENOENT)
+ return EXIT_SUCCESS;
+ if (r < 0) {
+ log_error("Failed to read ESP partition UUID: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ name = strjoin(arg_dest, "/boot.mount", NULL);
+ if (!name) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ f = fopen(name, "wxe");
+ if (!f) {
+ log_error("Failed to create mount unit file %s: %m", name);
+ return EXIT_FAILURE;
+ }
+
+ fprintf(f,
+ "# Automatially generated by systemd-efi-boot-generator\n\n"
+ "[Mount]\n"
+ "Where=/boot\n"
+ "What=/dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n"
+ "Options=umask=0077\n",
+ SD_ID128_FORMAT_VAL(id));
+
+ free(name);
+ name = strjoin(arg_dest, "/boot.automount", NULL);
+ if (!name) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ fclose(f);
+ f = fopen(name, "wxe");
+ if (!f) {
+ log_error("Failed to create automount unit file %s: %m", name);
+ return EXIT_FAILURE;
+ }
+
+ fprintf(f,
+ "# Automatially generated by systemd-efi-boot-generator\n\n"
+ "[Automount]\n"
+ "Where=/boot\n");
+
+ free(name);
+ name = strjoin(arg_dest, "/local-fs.target.wants/boot.automount", NULL);
+ if (!name) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ if (symlink("../boot.automount", name) < 0) {
+ log_error("Failed to create symlink: %m");
+ return EXIT_FAILURE;
+ }
+
+ return 0;
+}