1/* 2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26#include <Windows.h> 27#include <io.h> 28#include <stdio.h> 29#include <string.h> 30#include <malloc.h> 31 32void report_error(char const * msg) 33{ 34 LPVOID lpMsgBuf; 35 DWORD dw = GetLastError(); 36 37 FormatMessage( 38 FORMAT_MESSAGE_ALLOCATE_BUFFER | 39 FORMAT_MESSAGE_FROM_SYSTEM | 40 FORMAT_MESSAGE_IGNORE_INSERTS, 41 NULL, 42 dw, 43 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 44 (LPTSTR) &lpMsgBuf, 45 0, 46 NULL); 47 48 fprintf(stderr, 49 "%s Failed with error %d: %s\n", 50 msg, dw, lpMsgBuf); 51 52 LocalFree(lpMsgBuf); 53} 54 55/* 56 * Test if pos points to /cygdrive/_/ where _ can 57 * be any character. 58 */ 59int is_cygdrive_here(int pos, char const *in, int len) 60{ 61 // Length of /cygdrive/c/ is 12 62 if (pos+12 > len) return 0; 63 if (in[pos+11]=='/' && 64 in[pos+9]=='/' && 65 in[pos+8]=='e' && 66 in[pos+7]=='v' && 67 in[pos+6]=='i' && 68 in[pos+5]=='r' && 69 in[pos+4]=='d' && 70 in[pos+3]=='g' && 71 in[pos+2]=='y' && 72 in[pos+1]=='c' && 73 in[pos+0]=='/') { 74 return 1; 75 } 76 return 0; 77} 78 79/* 80 * Replace /cygdrive/_/ with _:/ 81 * Works in place since drive letter is always 82 * shorter than /cygdrive/ 83 */ 84char *replace_cygdrive_cygwin(char const *in) 85{ 86 size_t len = strlen(in); 87 char *out = (char*) malloc(len+1); 88 int i,j; 89 90 if (len < 12) { 91 memmove(out, in, len + 1); 92 return out; 93 } 94 95 for (i = 0, j = 0; i<len;) { 96 if (is_cygdrive_here(i, in, len)) { 97 out[j++] = in[i+10]; 98 out[j++] = ':'; 99 i+=11; 100 } else { 101 out[j] = in[i]; 102 i++; 103 j++; 104 } 105 } 106 out[j] = '\0'; 107 return out; 108} 109 110void append(char **b, size_t *bl, size_t *u, char *add, size_t addlen) 111{ 112 while ((addlen+*u+1) > *bl) { 113 *bl *= 2; 114 *b = (char*) realloc(*b, *bl); 115 } 116 memcpy(*b+*u, add, addlen); 117 *u += addlen; 118} 119 120/* 121 * Creates a new string from in where the first occurrence of sub is 122 * replaced by rep. 123 */ 124char *replace_substring(char *in, char *sub, char *rep) 125{ 126 int in_len = strlen(in); 127 int sub_len = strlen(sub); 128 int rep_len = strlen(rep); 129 char *out = (char *) malloc(in_len - sub_len + rep_len + 1); 130 char *p; 131 132 if (!(p = strstr(in, sub))) { 133 // If sub isn't a substring of in, just return in. 134 return in; 135 } 136 137 // Copy characters from beginning of in to start of sub. 138 strncpy(out, in, p - in); 139 out[p - in] = '\0'; 140 141 sprintf(out + (p - in), "%s%s", rep, p + sub_len); 142 143 return out; 144} 145 146char* msys_path_list; // @-separated list of paths prefix to look for 147char* msys_path_list_end; // Points to last \0 in msys_path_list. 148 149void setup_msys_path_list(char const * argument) 150{ 151 char* p; 152 char* drive_letter_pos; 153 154 msys_path_list = strdup(&argument[2]); 155 msys_path_list_end = &msys_path_list[strlen(msys_path_list)]; 156 157 // Convert all at-sign (@) in path list to \0. 158 // @ was chosen as separator to minimize risk of other tools messing around with it 159 p = msys_path_list; 160 do { 161 if (p[1] == ':') { 162 // msys has mangled our path list, restore it from c:/... to /c/... 163 drive_letter_pos = p+1; 164 *drive_letter_pos = *p; 165 *p = '/'; 166 } 167 168 // Look for an @ in the list 169 p = strchr(p, '@'); 170 if (p != NULL) { 171 *p = '\0'; 172 p++; 173 } 174 } while (p != NULL); 175} 176 177char *replace_cygdrive_msys(char const *in) 178{ 179 char* str; 180 char* prefix; 181 char* p; 182 183 str = strdup(in); 184 185 // For each prefix in the path list, search for it and replace /c/... with c:/... 186 for (prefix = msys_path_list; prefix < msys_path_list_end && prefix != NULL; prefix += strlen(prefix)+1) { 187 p=str; 188 while ((p = strstr(p, prefix))) { 189 char* drive_letter = p+1; 190 *p = *drive_letter; 191 *drive_letter = ':'; 192 p++; 193 } 194 } 195 196 return str; 197} 198 199char*(*replace_cygdrive)(char const *in) = NULL; 200 201char *files_to_delete[1024]; 202int num_files_to_delete = 0; 203 204char *fix_at_file(char const *in) 205{ 206 char *tmpdir; 207 char name[2048]; 208 char *atname; 209 char *buffer; 210 size_t buflen=65536; 211 size_t used=0; 212 size_t len; 213 int rc; 214 FILE *atout; 215 FILE *atin; 216 char block[2048]; 217 size_t blocklen; 218 char *fixed; 219 220 atin = fopen(in+1, "r"); 221 if (atin == NULL) { 222 fprintf(stderr, "Could not read at file %s\n", in+1); 223 exit(-1); 224 } 225 226 tmpdir = getenv("TEMP"); 227 if (tmpdir == NULL) { 228#if _WIN64 229 tmpdir = "c:/cygwin64/tmp"; 230#else 231 tmpdir = "c:/cygwin/tmp"; 232#endif 233 } 234 _snprintf(name, sizeof(name), "%s\\atfile_XXXXXX", tmpdir); 235 236 rc = _mktemp_s(name, strlen(name)+1); 237 if (rc) { 238 fprintf(stderr, "Could not create temporary file name for at file!\n"); 239 exit(-1); 240 } 241 242 atout = fopen(name, "w"); 243 if (atout == NULL) { 244 fprintf(stderr, "Could not open temporary file for writing! %s\n", name); 245 exit(-1); 246 } 247 248 buffer = (char*) malloc(buflen); 249 while ((blocklen = fread(block, 1, sizeof(block), atin)) > 0) { 250 append(&buffer, &buflen, &used, block, blocklen); 251 } 252 buffer[used] = 0; 253 if (getenv("DEBUG_FIXPATH") != NULL) { 254 fprintf(stderr, "fixpath input from @-file %s: %s\n", &in[1], buffer); 255 } 256 fixed = replace_cygdrive(buffer); 257 if (getenv("DEBUG_FIXPATH") != NULL) { 258 fprintf(stderr, "fixpath converted to @-file %s is: %s\n", name, fixed); 259 } 260 fwrite(fixed, strlen(fixed), 1, atout); 261 fclose(atin); 262 fclose(atout); 263 free(fixed); 264 free(buffer); 265 files_to_delete[num_files_to_delete] = (char*) malloc(strlen(name)+1); 266 strcpy(files_to_delete[num_files_to_delete], name); 267 num_files_to_delete++; 268 atname = (char*) malloc(strlen(name)+2); 269 atname[0] = '@'; 270 strcpy(atname+1, name); 271 return atname; 272} 273 274// given an argument, convert it to the windows command line safe quoted version 275// using rules from: 276// http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23/everyone-quotes-arguments-the-wrong-way.aspx 277// caller is responsible for freeing both input and output. 278char * quote_arg(char const * in_arg) { 279 char *quoted = NULL; 280 char *current = quoted; 281 int pass; 282 283 if (strlen(in_arg) == 0) { 284 // empty string? explicitly quote it. 285 return _strdup("\"\""); 286 } 287 288 if (strpbrk(in_arg, " \t\n\v\r\\\"") == NULL) { 289 return _strdup(in_arg); 290 } 291 292 // process the arg twice. Once to calculate the size and then to copy it. 293 for (pass=1; pass<=2; pass++) { 294 char const *arg = in_arg; 295 296 // initial " 297 if (pass == 2) { 298 *current = '\"'; 299 } 300 current++; 301 302 // process string to be quoted until NUL 303 do { 304 int escapes = 0; 305 306 while (*arg == '\\') { 307 // count escapes. 308 escapes++; 309 arg++; 310 } 311 312 if (*arg == '\0') { 313 // escape the escapes before final " 314 escapes *= 2; 315 } else if (*arg == '"') { 316 // escape the escapes and the " 317 escapes = escapes * 2 + 1; 318 } else { 319 // escapes aren't special, just echo them. 320 } 321 322 // emit some escapes 323 while (escapes > 0) { 324 if (pass == 2) { 325 *current = '\\'; 326 } 327 current++; 328 escapes--; 329 } 330 331 // and the current char 332 if (pass == 2) { 333 *current = *arg; 334 } 335 current++; 336 } while (*arg++ != '\0'); 337 338 // allocate the buffer 339 if (pass == 1) { 340 size_t alloc = (size_t) (current - quoted + (ptrdiff_t) 2); 341 current = quoted = (char*) calloc(alloc, sizeof(char)); 342 } 343 } 344 345 // final " and \0 346 *(current - 1) = '"'; 347 *current = '\0'; 348 349 return quoted; 350} 351 352int main(int argc, char const ** argv) 353{ 354 STARTUPINFO si; 355 PROCESS_INFORMATION pi; 356 unsigned short rc; 357 358 char *line; 359 char *current; 360 int i, cmd; 361 DWORD exitCode = 0; 362 DWORD processFlags = 0; 363 BOOL processInheritHandles = TRUE; 364 BOOL waitForChild = TRUE; 365 366 if (argc<2 || argv[1][0] != '-' || (argv[1][1] != 'c' && argv[1][1] != 'm')) { 367 fprintf(stderr, "Usage: fixpath -c|m<path@path@...> [--detach] /cygdrive/c/WINDOWS/notepad.exe [/cygdrive/c/x/test.txt|@/cygdrive/c/x/atfile]\n"); 368 exit(0); 369 } 370 371 if (getenv("DEBUG_FIXPATH") != NULL) { 372 char const * cmdline = GetCommandLine(); 373 fprintf(stderr, "fixpath input line >%s<\n", strstr(cmdline, argv[1])); 374 } 375 376 if (argv[1][1] == 'c' && argv[1][2] == '\0') { 377 if (getenv("DEBUG_FIXPATH") != NULL) { 378 fprintf(stderr, "fixpath using cygwin mode\n"); 379 } 380 replace_cygdrive = replace_cygdrive_cygwin; 381 } else if (argv[1][1] == 'm') { 382 if (getenv("DEBUG_FIXPATH") != NULL) { 383 fprintf(stderr, "fixpath using msys mode, with path list: %s\n", &argv[1][2]); 384 } 385 setup_msys_path_list(argv[1]); 386 replace_cygdrive = replace_cygdrive_msys; 387 } else { 388 fprintf(stderr, "fixpath Unknown mode: %s\n", argv[1]); 389 exit(-1); 390 } 391 392 if (argv[2][0] == '-') { 393 if (strcmp(argv[2], "--detach") == 0) { 394 if (getenv("DEBUG_FIXPATH") != NULL) { 395 fprintf(stderr, "fixpath in detached mode\n"); 396 } 397 processFlags |= DETACHED_PROCESS; 398 processInheritHandles = FALSE; 399 waitForChild = FALSE; 400 } else { 401 fprintf(stderr, "fixpath Unknown argument: %s\n", argv[2]); 402 exit(-1); 403 } 404 i = 3; 405 } else { 406 i = 2; 407 } 408 409 // handle assignments 410 while (i < argc) { 411 char const * assignment = strchr(argv[i], '='); 412 if (assignment != NULL && assignment != argv[i]) { 413 size_t var_len = (size_t) (assignment - argv[i] + (ptrdiff_t) 1); 414 char *var = (char *) calloc(var_len, sizeof(char)); 415 char *val = replace_cygdrive(assignment + 1); 416 memmove(var, argv[i], var_len); 417 var[var_len - 1] = '\0'; 418 strupr(var); 419 420 if (getenv("DEBUG_FIXPATH") != NULL) { 421 fprintf(stderr, "fixpath setting var >%s< to >%s<\n", var, val); 422 } 423 424 rc = SetEnvironmentVariable(var, val); 425 if (!rc) { 426 // Could not set var for some reason. Try to report why. 427 const int msg_len = 80 + var_len + strlen(val); 428 char * msg = (char *) alloca(msg_len); 429 _snprintf_s(msg, msg_len, _TRUNCATE, "Could not set environment variable [%s=%s]", var, val); 430 report_error(msg); 431 exit(1); 432 } 433 free(var); 434 free(val); 435 } else { 436 // no more assignments; 437 break; 438 } 439 i++; 440 } 441 442 // remember index of the command 443 cmd = i; 444 445 // handle command and it's args. 446 while (i < argc) { 447 char const *replaced = replace_cygdrive(argv[i]); 448 if (replaced[0] == '@') { 449 if (waitForChild == FALSE) { 450 fprintf(stderr, "fixpath Cannot use @-files in detached mode: %s\n", replaced); 451 exit(1); 452 } 453 // Found at-file! Fix it! 454 replaced = fix_at_file(replaced); 455 } 456 argv[i] = quote_arg(replaced); 457 i++; 458 } 459 460 // determine the length of the line 461 line = NULL; 462 // args 463 for (i = cmd; i < argc; i++) { 464 line += (ptrdiff_t) strlen(argv[i]); 465 } 466 // spaces and null 467 line += (ptrdiff_t) (argc - cmd + 1); 468 // allocate 469 line = (char*) calloc(line - (char*) NULL, sizeof(char)); 470 471 // copy in args. 472 current = line; 473 for (i = cmd; i < argc; i++) { 474 ptrdiff_t len = strlen(argv[i]); 475 if (i != cmd) { 476 *current++ = ' '; 477 } 478 memmove(current, argv[i], len); 479 current += len; 480 } 481 *current = '\0'; 482 483 if (getenv("DEBUG_FIXPATH") != NULL) { 484 fprintf(stderr, "fixpath converted line >%s<\n", line); 485 } 486 487 if (cmd == argc) { 488 if (getenv("DEBUG_FIXPATH") != NULL) { 489 fprintf(stderr, "fixpath no command provided!\n"); 490 } 491 exit(0); 492 } 493 494 ZeroMemory(&si, sizeof(si)); 495 si.cb=sizeof(si); 496 ZeroMemory(&pi, sizeof(pi)); 497 498 fflush(stderr); 499 fflush(stdout); 500 501 rc = CreateProcess(NULL, 502 line, 503 0, 504 0, 505 processInheritHandles, 506 processFlags, 507 NULL, 508 NULL, 509 &si, 510 &pi); 511 if (!rc) { 512 // Could not start process for some reason. Try to report why: 513 report_error("Could not start process!"); 514 exit(126); 515 } 516 517 if (waitForChild == TRUE) { 518 WaitForSingleObject(pi.hProcess, INFINITE); 519 GetExitCodeProcess(pi.hProcess, &exitCode); 520 521 if (getenv("DEBUG_FIXPATH") != NULL) { 522 for (i=0; i<num_files_to_delete; ++i) { 523 fprintf(stderr, "fixpath Not deleting temporary file %s\n", 524 files_to_delete[i]); 525 } 526 } else { 527 for (i=0; i<num_files_to_delete; ++i) { 528 remove(files_to_delete[i]); 529 } 530 } 531 532 if (exitCode != 0) { 533 if (getenv("DEBUG_FIXPATH") != NULL) { 534 fprintf(stderr, "fixpath exit code %d\n", 535 exitCode); 536 } 537 } 538 } else { 539 if (getenv("DEBUG_FIXPATH") != NULL) { 540 fprintf(stderr, "fixpath Not waiting for child process"); 541 } 542 } 543 544 exit(exitCode); 545} 546