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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <sys/stat.h>
#include "devnum-util.h"
#include "hibernate-resume-config.h"
#include "hibernate-util.h"
#include "initrd-util.h"
#include "log.h"
#include "main-func.h"
#include "parse-util.h"
#include "static-destruct.h"
static HibernateInfo arg_info = {};
STATIC_DESTRUCTOR_REGISTER(arg_info, hibernate_info_done);
static int setup_hibernate_info_and_warn(void) {
int r;
r = acquire_hibernate_info(&arg_info);
if (r == -ENODEV) {
log_info_errno(r, "No resume device found, exiting.");
return 0;
}
if (r < 0)
return r;
compare_hibernate_location_and_warn(&arg_info);
return 1;
}
static int run(int argc, char *argv[]) {
struct stat st;
int r;
log_setup();
if (argc < 1 || argc > 3)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program expects zero, one, or two arguments.");
umask(0022);
if (!in_initrd())
return 0;
if (argc > 1) {
arg_info.device = argv[1];
if (argc == 3) {
r = safe_atou64(argv[2], &arg_info.offset);
if (r < 0)
return log_error_errno(r, "Failed to parse resume offset %s: %m", argv[2]);
}
} else {
r = setup_hibernate_info_and_warn();
if (r <= 0)
return r;
if (arg_info.efi)
clear_efi_hibernate_location();
}
if (stat(arg_info.device, &st) < 0)
return log_error_errno(errno, "Failed to stat resume device '%s': %m", arg_info.device);
if (!S_ISBLK(st.st_mode))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Resume device '%s' is not a block device.", arg_info.device);
/* The write shall not return if a resume takes place. */
r = write_resume_config(st.st_rdev, arg_info.offset, arg_info.device);
log_full_errno(r < 0 ? LOG_ERR : LOG_DEBUG,
r < 0 ? r : SYNTHETIC_ERRNO(ENOENT),
"Unable to resume from device '%s' (" DEVNUM_FORMAT_STR ") offset %" PRIu64 ", continuing boot process.",
arg_info.device, DEVNUM_FORMAT_VAL(st.st_rdev), arg_info.offset);
return r;
}
DEFINE_MAIN_FUNCTION(run);
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