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b7b865cfee
In order to dual boot Windows and ChromeOS, Windows must
not find a GPT partition table on the disk. So change
ChromeOS to cope with an alternative signature "CHROMEOS"
instead of the standard "EFI PART"
BUG=chrome-os-partner:6108
TEST=rebuild chromeos, install it,
run cgpt legacy /dev/sda
dd if=/dev/sda of=/tmp/x bs=1k
hexdump -C /tmp/X
see the string CHROMEOS
BRANCH=link
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Change-Id: Ia88eff33b9880bd73a78c1b8e026c1f8298c4557
Reviewed-on: https://gerrit.chromium.org/gerrit/31264
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
// Copyright (c) 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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#include "cgpt.h"
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#include <getopt.h>
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#include <string.h>
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#include "cgpt_params.h"
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static void Usage(void)
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{
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printf("\nUsage: %s legacy [OPTIONS] DRIVE\n\n"
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"Switch GPT header signature to \"CHROMEOS\".\n\n"
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"Options:\n"
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" -e Switch GPT header signature back to \"EFI PART\"\n"
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"\n", progname);
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}
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int cmd_legacy(int argc, char *argv[]) {
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CgptLegacyParams params;
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memset(¶ms, 0, sizeof(params));
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int c;
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int errorcnt = 0;
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opterr = 0; // quiet, you
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while ((c=getopt(argc, argv, ":he")) != -1)
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{
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switch (c)
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{
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case 'e':
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params.efipart = 1;
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break;
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case 'h':
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Usage();
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return CGPT_OK;
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case '?':
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Error("unrecognized option: -%c\n", optopt);
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errorcnt++;
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break;
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case ':':
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Error("missing argument to -%c\n", optopt);
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errorcnt++;
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break;
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default:
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errorcnt++;
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break;
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}
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}
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if (errorcnt)
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{
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Usage();
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return CGPT_FAILED;
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}
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if (optind >= argc) {
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Usage();
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return CGPT_FAILED;
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}
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params.drive_name = argv[optind];
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return cgpt_legacy(¶ms);
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}
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