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/* Copyright 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Exports the kernel commandline from a given partition/image.
*/
#include <getopt.h>
#include <stdio.h>
#include <sys/mman.h>
#include <unistd.h>
#include "futility.h"
#include "vboot_host.h"
enum {
OPT_KLOADADDR = 1000,
};
static const struct option long_opts[] = {
{"kloadaddr", 1, NULL, OPT_KLOADADDR},
{NULL, 0, NULL, 0}
};
/* Print help and return error */
static void PrintHelp(const char *progname)
{
printf("\nUsage: " MYNAME " %s [--kloadaddr ADDRESS] "
"KERNEL_PARTITION\n\n", progname);
}
static int do_dump_kernel_config(int argc, char *argv[])
{
char *infile = NULL;
char *config = NULL;
uint64_t kernel_body_load_address = USE_PREAMBLE_LOAD_ADDR;
int parse_error = 0;
char *e;
int i;
while (((i = getopt_long(argc, argv, ":", long_opts, NULL)) != -1) &&
!parse_error) {
switch (i) {
default:
case '?':
/* Unhandled option */
parse_error = 1;
break;
case 0:
/* silently handled option */
break;
case OPT_KLOADADDR:
kernel_body_load_address = strtoul(optarg, &e, 0);
if (!*optarg || (e && *e)) {
fprintf(stderr, "Invalid --kloadaddr\n");
parse_error = 1;
}
break;
}
}
if (optind >= argc) {
fprintf(stderr, "Expected argument after options\n");
parse_error = 1;
} else
infile = argv[optind];
if (parse_error) {
PrintHelp(argv[0]);
return 1;
}
if (!infile || !*infile) {
fprintf(stderr, "Must specify filename\n");
return 1;
}
config = FindKernelConfig(infile, kernel_body_load_address);
if (!config)
return 1;
printf("%s", config);
free(config);
return 0;
}
DECLARE_FUTIL_COMMAND(dump_kernel_config, do_dump_kernel_config,
"Prints the kernel command line",
PrintHelp);
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