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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <sys/stat.h>
#include "devnum-util.h"
#include "initrd-util.h"
#include "log.h"
#include "main-func.h"
#include "parse-util.h"
#include "sleep-util.h"
static const char *arg_resume_device = NULL;
static uint64_t arg_resume_offset = 0; /* in memory pages */
static int run(int argc, char *argv[]) {
struct stat st;
int r;
log_setup();
if (argc < 2 || argc > 3)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program expects one or two arguments.");
umask(0022);
if (!in_initrd())
return 0;
arg_resume_device = argv[1];
if (argc == 3) {
r = safe_atou64(argv[2], &arg_resume_offset);
if (r < 0)
return log_error_errno(r, "Failed to parse resume offset %s: %m", argv[2]);
}
if (stat(arg_resume_device, &st) < 0)
return log_error_errno(errno, "Failed to stat resume device '%s': %m", arg_resume_device);
if (!S_ISBLK(st.st_mode))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Resume device '%s' is not a block device.", arg_resume_device);
/* The write shall not return if a resume takes place. */
r = write_resume_config(st.st_rdev, arg_resume_offset, arg_resume_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_resume_device, DEVNUM_FORMAT_VAL(st.st_rdev), arg_resume_offset);
return r;
}
DEFINE_MAIN_FUNCTION(run);
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