| // Copyright (c) 2010 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. |
| // |
| // BootloaderType implementation |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include <string> |
| |
| #include "bootloader_type.h" |
| |
| namespace cros_boot_mode { |
| |
| const char *BootloaderType::kBootloaderTypeText[] = { |
| "debug", // cros_debug (cros_fw with developer override) |
| "chromeos", // cros_fw (any platform) |
| "efi", // cros_efi |
| "legacy", // cros_legacy |
| }; |
| const size_t BootloaderType::kBootloaderTypeCount = |
| sizeof(kBootloaderTypeText) / sizeof(*kBootloaderTypeText); |
| // These values are expected to be found in the kernel commandline with space |
| // or '\0' word boundaries. The ordering of this array must correspond to |
| // the array above and the defined enum. |
| const char *BootloaderType::kSupportedBootloaders[] = { |
| "cros_debug", |
| "cros_secure", |
| "cros_efi", |
| "cros_legacy", |
| }; |
| |
| const int BootloaderType::kMaxKernelCmdlineSize = 4096; // one page. |
| |
| BootloaderType::BootloaderType() { } |
| BootloaderType::~BootloaderType() { } |
| |
| // This function looks for given argument space or nul delimited in |
| // a /proc/cmdline style char array. See bootloader_type.h for details. |
| int BootloaderType::Process(const char *contents, size_t length) { |
| if (!length || !contents) |
| return kUnsupported; |
| |
| static const char kDelimiter = ' '; |
| static const char kTerminal = '\0'; |
| for (unsigned i = 0; i < kBootloaderTypeCount; ++i) { |
| const char *candidate = kSupportedBootloaders[i]; |
| const char *start = strstr(contents, candidate); |
| while (start) { |
| const char *end = start + strlen(candidate); |
| if ((*end == kTerminal || *end == kDelimiter) && |
| (start == contents || *(start - 1) == kDelimiter)) |
| return i; |
| start = strstr(end, candidate); |
| } |
| } |
| return kUnsupported; |
| } |
| |
| } // namespace cros_boot_mode |