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01466d36af
Instead of a separate help function for each command, let's just require each command to handle a --help option. This will make it easier to layer the commands (for example, "sign" could have several subcommand variants, each with its own help). BUG=none BRANCH=none TEST=make runtests I also compared the result of running "futility help CMD" before and after this change. The help still shows up correctly. Change-Id: I5c58176f32b41b0a2c2b8f0afb17dddd80fddc70 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/260495 Reviewed-by: Randall Spangler <rspangler@chromium.org>
99 lines
1.9 KiB
C
99 lines
1.9 KiB
C
/* Copyright 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Exports the kernel commandline from a given partition/image.
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*/
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#include <getopt.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include "futility.h"
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#include "vboot_host.h"
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enum {
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OPT_KLOADADDR = 1000,
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OPT_HELP,
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};
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static const struct option long_opts[] = {
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{"kloadaddr", 1, NULL, OPT_KLOADADDR},
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{"help", 0, 0, OPT_HELP},
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{NULL, 0, NULL, 0}
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};
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/* Print help and return error */
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static void print_help(int argc, char *argv[])
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{
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printf("\nUsage: " MYNAME " %s [--kloadaddr ADDRESS] "
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"KERNEL_PARTITION\n\n", argv[0]);
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}
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static int do_dump_kern_cfg(int argc, char *argv[])
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{
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char *infile = NULL;
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char *config = NULL;
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uint64_t kernel_body_load_address = USE_PREAMBLE_LOAD_ADDR;
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int parse_error = 0;
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char *e;
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int i;
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while (((i = getopt_long(argc, argv, ":", long_opts, NULL)) != -1) &&
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!parse_error) {
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switch (i) {
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default:
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case '?':
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/* Unhandled option */
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parse_error = 1;
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break;
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case 0:
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/* silently handled option */
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break;
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case OPT_KLOADADDR:
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kernel_body_load_address = strtoul(optarg, &e, 0);
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if (!*optarg || (e && *e)) {
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fprintf(stderr, "Invalid --kloadaddr\n");
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parse_error = 1;
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}
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break;
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case OPT_HELP:
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print_help(argc, argv);
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return 0;
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}
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}
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if (optind >= argc) {
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fprintf(stderr, "Expected argument after options\n");
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parse_error = 1;
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} else
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infile = argv[optind];
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if (parse_error) {
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print_help(argc, argv);
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return 1;
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}
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if (!infile || !*infile) {
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fprintf(stderr, "Must specify filename\n");
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return 1;
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}
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config = FindKernelConfig(infile, kernel_body_load_address);
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if (!config)
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return 1;
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printf("%s", config);
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free(config);
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return 0;
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}
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DECLARE_FUTIL_COMMAND(dump_kernel_config, do_dump_kern_cfg, VBOOT_VERSION_ALL,
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"Prints the kernel command line");
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