1 /* 2 * Copyright (c) 2009-2013, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google, Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <unistd.h> 34 #include <stdio.h> 35 #include <sys/ioctl.h> 36 #include <linux/fs.h> 37 #include <stdlib.h> 38 #include <cutils/properties.h> 39 40 #include "utils.h" 41 #include "debug.h" 42 43 #ifndef BLKDISCARD 44 #define BLKDISCARD _IO(0x12,119) 45 #endif 46 47 #ifndef BLKSECDISCARD 48 #define BLKSECDISCARD _IO(0x12,125) 49 #endif 50 51 #define READ_BUF_SIZE (16*1024) 52 53 int get_stream_size(FILE *stream) { 54 int size; 55 fseek(stream, 0, SEEK_END); 56 size = ftell(stream); 57 fseek(stream, 0, SEEK_SET); 58 return size; 59 } 60 61 uint64_t get_block_device_size(int fd) 62 { 63 uint64_t size = 0; 64 int ret; 65 66 ret = ioctl(fd, BLKGETSIZE64, &size); 67 68 if (ret) 69 return 0; 70 71 return size; 72 } 73 74 uint64_t get_file_size(int fd) 75 { 76 struct stat buf; 77 int ret; 78 int64_t computed_size; 79 80 ret = fstat(fd, &buf); 81 if (ret) 82 return 0; 83 84 if (S_ISREG(buf.st_mode)) 85 computed_size = buf.st_size; 86 else if (S_ISBLK(buf.st_mode)) 87 computed_size = get_block_device_size(fd); 88 else 89 computed_size = 0; 90 91 return computed_size; 92 } 93 94 uint64_t get_file_size64(int fd) 95 { 96 struct stat64 buf; 97 int ret; 98 uint64_t computed_size; 99 100 ret = fstat64(fd, &buf); 101 if (ret) 102 return 0; 103 104 if (S_ISREG(buf.st_mode)) 105 computed_size = buf.st_size; 106 else if (S_ISBLK(buf.st_mode)) 107 computed_size = get_block_device_size(fd); 108 else 109 computed_size = 0; 110 111 return computed_size; 112 } 113 114 115 char *strip(char *str) 116 { 117 int n; 118 119 n = strspn(str, " \t"); 120 str += n; 121 n = strcspn(str, " \t"); 122 str[n] = '\0'; 123 124 return str; 125 } 126 127 int wipe_block_device(int fd, int64_t len) 128 { 129 uint64_t range[2]; 130 int ret; 131 132 range[0] = 0; 133 range[1] = len; 134 ret = ioctl(fd, BLKSECDISCARD, &range); 135 if (ret < 0) { 136 range[0] = 0; 137 range[1] = len; 138 ret = ioctl(fd, BLKDISCARD, &range); 139 if (ret < 0) { 140 D(WARN, "Discard failed\n"); 141 return 1; 142 } else { 143 D(WARN, "Wipe via secure discard failed, used discard instead\n"); 144 return 0; 145 } 146 } 147 148 return 0; 149 } 150 151 int create_temp_file() { 152 char tempname[] = "/dev/fastboot_data_XXXXXX"; 153 int fd; 154 155 fd = mkstemp(tempname); 156 if (fd < 0) 157 return -1; 158 159 unlink(tempname); 160 161 return fd; 162 } 163 164 ssize_t bulk_write(int bulk_in, const char *buf, size_t length) 165 { 166 size_t count = 0; 167 ssize_t ret; 168 169 do { 170 ret = TEMP_FAILURE_RETRY(write(bulk_in, buf + count, length - count)); 171 if (ret < 0) { 172 D(WARN, "[ bulk_write failed fd=%d length=%zu errno=%d %s ]", 173 bulk_in, length, errno, strerror(errno)); 174 return -1; 175 } else { 176 count += ret; 177 } 178 } while (count < length); 179 180 D(VERBOSE, "[ bulk_write done fd=%d ]", bulk_in); 181 return count; 182 } 183 184 ssize_t bulk_read(int bulk_out, char *buf, size_t length) 185 { 186 ssize_t ret; 187 size_t n = 0; 188 189 while (n < length) { 190 size_t to_read = (length - n > READ_BUF_SIZE) ? READ_BUF_SIZE : length - n; 191 ret = TEMP_FAILURE_RETRY(read(bulk_out, buf + n, to_read)); 192 if (ret < 0) { 193 D(WARN, "[ bulk_read failed fd=%d length=%zu errno=%d %s ]", 194 bulk_out, length, errno, strerror(errno)); 195 return ret; 196 } 197 n += ret; 198 if (ret < (ssize_t)to_read) { 199 D(VERBOSE, "bulk_read short read, ret=%zd to_read=%zu n=%zu length=%zu", 200 ret, to_read, n, length); 201 break; 202 } 203 } 204 205 return n; 206 } 207 208 #define NAP_TIME 200 // 200 ms between polls 209 static int wait_for_property(const char *name, const char *desired_value, int maxwait) 210 { 211 char value[PROPERTY_VALUE_MAX] = {'\0'}; 212 int maxnaps = (maxwait * 1000) / NAP_TIME; 213 214 if (maxnaps < 1) { 215 maxnaps = 1; 216 } 217 218 while (maxnaps-- > 0) { 219 usleep(NAP_TIME * 1000); 220 if (property_get(name, value, NULL)) { 221 if (desired_value == NULL || strcmp(value, desired_value) == 0) { 222 return 0; 223 } 224 } 225 } 226 return -1; /* failure */ 227 } 228 229 int service_start(const char *service_name) 230 { 231 int result = 0; 232 char property_value[PROPERTY_VALUE_MAX]; 233 234 property_get(service_name, property_value, ""); 235 if (strcmp("running", property_value) != 0) { 236 D(INFO, "Starting %s", service_name); 237 property_set("ctl.start", service_name); 238 if (wait_for_property(service_name, "running", 5)) 239 result = -1; 240 } 241 242 return result; 243 } 244 245 int service_stop(const char *service_name) 246 { 247 int result = 0; 248 249 D(INFO, "Stopping MDNSD"); 250 property_set("ctl.stop", service_name); 251 if (wait_for_property(service_name, "stopped", 5)) 252 result = -1; 253 254 return result; 255 } 256 257 int ssh_server_start() 258 { 259 return service_start("sshd"); 260 } 261
