1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <sys/types.h> 18 #include <sys/stat.h> 19 #include <fcntl.h> 20 #include <sysexits.h> 21 22 #include <errno.h> 23 #include <limits.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 28 #include <hardware/hardware.h> 29 #include <hardware/boot_control.h> 30 31 static void usage(FILE* where, int argc, char* argv[]) 32 { 33 fprintf(where, 34 "%s - command-line wrapper for the boot_control HAL.\n" 35 "\n" 36 "Usage:\n" 37 " %s COMMAND\n" 38 "\n" 39 "Commands:\n" 40 " %s hal-info - Show info about boot_control HAL used.\n" 41 " %s get-number-slots - Prints number of slots.\n" 42 " %s get-current-slot - Prints currently running SLOT.\n" 43 " %s mark-boot-successful - Mark current slot as GOOD.\n" 44 " %s set-active-boot-slot SLOT - On next boot, load and execute SLOT.\n" 45 " %s set-slot-as-unbootable SLOT - Mark SLOT as invalid.\n" 46 " %s is-slot-bootable SLOT - Returns 0 only if SLOT is bootable.\n" 47 " %s is-slot-marked-successful SLOT - Returns 0 only if SLOT is marked GOOD.\n" 48 " %s get-suffix SLOT - Prints suffix for SLOT.\n" 49 "\n" 50 "SLOT parameter is the zero-based slot-number.\n", 51 argv[0], argv[0], argv[0], argv[0], argv[0], argv[0], 52 argv[0], argv[0], argv[0], argv[0], argv[0]); 53 } 54 55 static int do_hal_info(const hw_module_t *hw_module) 56 { 57 fprintf(stdout, 58 "HAL name: %s\n" 59 "HAL author: %s\n" 60 "HAL module version: %d.%d\n", 61 hw_module->name, 62 hw_module->author, 63 hw_module->module_api_version>>8, 64 hw_module->module_api_version&0xff); 65 return EX_OK; 66 } 67 68 static int do_get_number_slots(boot_control_module_t *module) 69 { 70 int num_slots = module->getNumberSlots(module); 71 fprintf(stdout, "%d\n", num_slots); 72 return EX_OK; 73 } 74 75 static int do_get_current_slot(boot_control_module_t *module) 76 { 77 int cur_slot = module->getCurrentSlot(module); 78 fprintf(stdout, "%d\n", cur_slot); 79 return EX_OK; 80 } 81 82 static int do_mark_boot_successful(boot_control_module_t *module) 83 { 84 int ret = module->markBootSuccessful(module); 85 if (ret == 0) 86 return EX_OK; 87 fprintf(stderr, "Error marking as having booted successfully: %s\n", 88 strerror(-ret)); 89 return EX_SOFTWARE; 90 } 91 92 static int do_set_active_boot_slot(boot_control_module_t *module, 93 int slot_number) 94 { 95 int ret = module->setActiveBootSlot(module, slot_number); 96 if (ret == 0) 97 return EX_OK; 98 fprintf(stderr, "Error setting active boot slot: %s\n", strerror(-ret)); 99 return EX_SOFTWARE; 100 } 101 102 static int do_set_slot_as_unbootable(boot_control_module_t *module, 103 int slot_number) 104 { 105 int ret = module->setSlotAsUnbootable(module, slot_number); 106 if (ret == 0) 107 return EX_OK; 108 fprintf(stderr, "Error setting slot as unbootable: %s\n", strerror(-ret)); 109 return EX_SOFTWARE; 110 } 111 112 113 static int do_is_slot_bootable(boot_control_module_t *module, int slot_number) 114 { 115 int ret = module->isSlotBootable(module, slot_number); 116 if (ret == 0) { 117 return EX_SOFTWARE; 118 } else if (ret < 0) { 119 fprintf(stderr, "Error calling isSlotBootable(): %s\n", 120 strerror(-ret)); 121 return EX_SOFTWARE; 122 } 123 return EX_OK; 124 } 125 126 127 static int do_get_suffix(boot_control_module_t *module, int slot_number) 128 { 129 const char* suffix = module->getSuffix(module, slot_number); 130 fprintf(stdout, "%s\n", suffix); 131 return EX_OK; 132 } 133 134 static int do_is_slot_marked_successful(boot_control_module_t *module, 135 int slot_number) 136 { 137 if (module->isSlotMarkedSuccessful == NULL) { 138 fprintf(stderr, "isSlotMarkedSuccessful() is not implemented by HAL.\n"); 139 return EX_UNAVAILABLE; 140 } 141 int ret = module->isSlotMarkedSuccessful(module, slot_number); 142 if (ret == 0) { 143 return EX_SOFTWARE; 144 } else if (ret < 0) { 145 fprintf(stderr, "Error calling isSlotMarkedSuccessful(): %s\n", 146 strerror(-ret)); 147 return EX_SOFTWARE; 148 } 149 return EX_OK; 150 } 151 152 static int parse_slot(int pos, int argc, char *argv[]) 153 { 154 if (pos > argc - 1) { 155 usage(stderr, argc, argv); 156 exit(EX_USAGE); 157 return -1; 158 } 159 errno = 0; 160 long int ret = strtol(argv[pos], NULL, 10); 161 if (errno != 0 || ret > INT_MAX || ret < 0) { 162 usage(stderr, argc, argv); 163 exit(EX_USAGE); 164 return -1; 165 } 166 return (int)ret; 167 } 168 169 int main(int argc, char *argv[]) 170 { 171 const hw_module_t *hw_module; 172 boot_control_module_t *module; 173 int ret; 174 175 if (argc < 2) { 176 usage(stderr, argc, argv); 177 return EX_USAGE; 178 } 179 180 ret = hw_get_module("bootctrl", &hw_module); 181 if (ret != 0) { 182 fprintf(stderr, "Error getting bootctrl module.\n"); 183 return EX_SOFTWARE; 184 } 185 module = (boot_control_module_t*) hw_module; 186 module->init(module); 187 188 if (strcmp(argv[1], "hal-info") == 0) { 189 return do_hal_info(hw_module); 190 } else if (strcmp(argv[1], "get-number-slots") == 0) { 191 return do_get_number_slots(module); 192 } else if (strcmp(argv[1], "get-current-slot") == 0) { 193 return do_get_current_slot(module); 194 } else if (strcmp(argv[1], "mark-boot-successful") == 0) { 195 return do_mark_boot_successful(module); 196 } else if (strcmp(argv[1], "set-active-boot-slot") == 0) { 197 return do_set_active_boot_slot(module, parse_slot(2, argc, argv)); 198 } else if (strcmp(argv[1], "set-slot-as-unbootable") == 0) { 199 return do_set_slot_as_unbootable(module, parse_slot(2, argc, argv)); 200 } else if (strcmp(argv[1], "is-slot-bootable") == 0) { 201 return do_is_slot_bootable(module, parse_slot(2, argc, argv)); 202 } else if (strcmp(argv[1], "get-suffix") == 0) { 203 return do_get_suffix(module, parse_slot(2, argc, argv)); 204 } else if (strcmp(argv[1], "is-slot-marked-successful") == 0) { 205 return do_is_slot_marked_successful(module, parse_slot(2, argc, argv)); 206 } else { 207 usage(stderr, argc, argv); 208 return EX_USAGE; 209 } 210 211 return 0; 212 } 213
