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/*-*- 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"
#include "mkdir.h"
#include "virt.h"
#include "generator.h"
#include "special.h"
static const char *arg_dest = "/tmp";
int main(int argc, char *argv[]) {
_cleanup_free_ char *what = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r = EXIT_SUCCESS;
sd_id128_t id;
char *name;
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 (in_initrd()) {
log_debug("In initrd, exiting.");
return EXIT_SUCCESS;
}
if (detect_container(NULL) > 0) {
log_debug("In a container, exiting.");
return EXIT_SUCCESS;
}
if (!is_efi_boot()) {
log_debug("Not an EFI boot, exiting.");
return EXIT_SUCCESS;
}
r = path_is_mount_point("/boot", AT_SYMLINK_FOLLOW);
if (r > 0) {
log_debug("/boot is already a mount point, exiting.");
return EXIT_SUCCESS;
}
if (r == -ENOENT)
log_debug("/boot does not exist, continuing.");
else if (dir_is_empty("/boot") <= 0) {
log_debug("/boot already populated, exiting.");
return EXIT_SUCCESS;
}
r = efi_loader_get_device_part_uuid(&id);
if (r == -ENOENT) {
log_debug("EFI loader partition unknown, exiting.");
return EXIT_SUCCESS;
} else if (r < 0) {
log_error_errno(r, "Failed to read ESP partition UUID: %m");
return EXIT_FAILURE;
}
name = strjoina(arg_dest, "/boot.mount");
f = fopen(name, "wxe");
if (!f) {
log_error_errno(errno, "Failed to create mount unit file %s: %m", name);
return EXIT_FAILURE;
}
r = asprintf(&what,
"/dev/disk/by-partuuid/%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
SD_ID128_FORMAT_VAL(id));
if (r < 0) {
log_oom();
return EXIT_FAILURE;
}
fprintf(f,
"# Automatially generated by systemd-efi-boot-generator\n\n"
"[Unit]\n"
"Description=EFI System Partition\n"
"Documentation=man:systemd-efi-boot-generator(8)\n");
r = generator_write_fsck_deps(f, arg_dest, what, "/boot", "vfat");
if (r < 0)
return EXIT_FAILURE;
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
"Where=/boot\n"
"Type=vfat\n"
"Options=umask=0077,noauto\n",
what);
r = fflush_and_check(f);
if (r < 0) {
log_error_errno(r, "Failed to write mount unit file: %m");
return EXIT_FAILURE;
}
name = strjoina(arg_dest, "/boot.automount");
fclose(f);
f = fopen(name, "wxe");
if (!f) {
log_error_errno(errno, "Failed to create automount unit file %s: %m", name);
return EXIT_FAILURE;
}
fputs("# Automatially generated by systemd-efi-boot-generator\n\n"
"[Unit]\n"
"Description=EFI System Partition Automount\n\n"
"[Automount]\n"
"Where=/boot\n"
"TimeoutIdleSec=120\n", f);
r = fflush_and_check(f);
if (r < 0) {
log_error_errno(r, "Failed to write automount unit file: %m");
return EXIT_FAILURE;
}
name = strjoina(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/boot.automount");
mkdir_parents(name, 0755);
if (symlink("../boot.automount", name) < 0) {
log_error_errno(errno, "Failed to create symlink %s: %m", name);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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