fixpath.c revision 1015:45183b39d300
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 occurance 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(strpbrk(in_arg, " \t\n\v\r\\\"") == NULL) { 284 return _strdup(in_arg); 285 } 286 287 // process the arg twice. Once to calculate the size and then to copy it. 288 for(pass=1; pass<=2; pass++) { 289 char const *arg = in_arg; 290 291 // initial " 292 if(pass == 2) { 293 *current = '\"'; 294 } 295 current++; 296 297 // process string to be quoted until NUL 298 do { 299 int escapes = 0; 300 301 while (*arg == '\\') { 302 // count escapes. 303 escapes++; 304 arg++; 305 } 306 307 if (*arg == '\0') { 308 // escape the escapes before final " 309 escapes *= 2; 310 } else if (*arg == '"') { 311 // escape the escapes and the " 312 escapes = escapes * 2 + 1; 313 } else { 314 // escapes aren't special, just echo them. 315 } 316 317 // emit some escapes 318 while (escapes > 0) { 319 if (pass == 2) { 320 *current = '\\'; 321 } 322 current++; 323 escapes--; 324 } 325 326 // and the current char 327 if (pass == 2) { 328 *current = *arg; 329 } 330 current++; 331 } while( *arg++ != '\0'); 332 333 // allocate the buffer 334 if (pass == 1) { 335 size_t alloc = (size_t) (current - quoted + (ptrdiff_t) 2); 336 current = quoted = (char*) calloc(alloc, sizeof(char)); 337 } 338 } 339 340 // final " and \0 341 *(current - 1) = '"'; 342 *current = '\0'; 343 344 return quoted; 345} 346 347int main(int argc, char const ** argv) 348{ 349 STARTUPINFO si; 350 PROCESS_INFORMATION pi; 351 unsigned short rc; 352 353 char *line; 354 char *current; 355 int i, cmd; 356 DWORD exitCode; 357 358 if (argc<2 || argv[1][0] != '-' || (argv[1][1] != 'c' && argv[1][1] != 'm')) { 359 fprintf(stderr, "Usage: fixpath -c|m<path@path@...> /cygdrive/c/WINDOWS/notepad.exe [/cygdrive/c/x/test.txt|@/cygdrive/c/x/atfile]\n"); 360 exit(0); 361 } 362 363 if (getenv("DEBUG_FIXPATH") != NULL) { 364 char const * cmdline = GetCommandLine(); 365 fprintf(stderr, "fixpath input line >%s<\n", strstr( cmdline , argv[1])); 366 } 367 368 if (argv[1][1] == 'c' && argv[1][2] == '\0') { 369 if (getenv("DEBUG_FIXPATH") != NULL) { 370 fprintf(stderr, "fixpath using cygwin mode\n"); 371 } 372 replace_cygdrive = replace_cygdrive_cygwin; 373 } else if (argv[1][1] == 'm') { 374 if (getenv("DEBUG_FIXPATH") != NULL) { 375 fprintf(stderr, "fixpath using msys mode, with path list: %s\n", &argv[1][2]); 376 } 377 setup_msys_path_list(argv[1]); 378 replace_cygdrive = replace_cygdrive_msys; 379 } else { 380 fprintf(stderr, "fixpath Unknown mode: %s\n", argv[1]); 381 exit(-1); 382 } 383 384 i = 2; 385 386 // handle assignments 387 while (i < argc) { 388 char const * assignment = strchr(argv[i], '='); 389 if (assignment != NULL && assignment != argv[i]) { 390 size_t var_len = (size_t) (assignment - argv[i] + (ptrdiff_t) 1); 391 char *var = (char *) calloc(var_len, sizeof(char)); 392 char *val = replace_cygdrive(assignment + 1); 393 memmove(var, argv[i], var_len); 394 var[var_len - 1] = '\0'; 395 strupr(var); 396 397 if (getenv("DEBUG_FIXPATH") != NULL) { 398 fprintf(stderr, "fixpath setting var >%s< to >%s<\n", var, val); 399 } 400 401 rc = SetEnvironmentVariable(var, val); 402 if(!rc) { 403 // Could not set var for some reason. Try to report why. 404 const int msg_len = 80 + var_len + strlen(val); 405 char * msg = (char *) alloca(msg_len); 406 _snprintf_s(msg, msg_len, _TRUNCATE, "Could not set environment variable [%s=%s]", var, val); 407 report_error(msg); 408 exit(1); 409 } 410 free(var); 411 free(val); 412 } else { 413 // no more assignments; 414 break; 415 } 416 i++; 417 } 418 419 // remember index of the command 420 cmd = i; 421 422 // handle command and it's args. 423 while (i < argc) { 424 char const *replaced = replace_cygdrive(argv[i]); 425 if(replaced[0] == '@') { 426 // Found at-file! Fix it! 427 replaced = fix_at_file(replaced); 428 } 429 argv[i] = quote_arg(replaced); 430 i++; 431 } 432 433 // determine the length of the line 434 line = NULL; 435 // args 436 for(i = cmd; i < argc; i++) { 437 line += (ptrdiff_t) strlen(argv[i]); 438 } 439 // spaces and null 440 line += (ptrdiff_t) (argc - cmd + 1); 441 // allocate 442 line = (char*) calloc(line - (char*) NULL, sizeof(char)); 443 444 // copy in args. 445 current = line; 446 for(i = cmd; i < argc; i++) { 447 ptrdiff_t len = strlen(argv[i]); 448 if (i != cmd) { 449 *current++ = ' '; 450 } 451 memmove(current, argv[i], len); 452 current += len; 453 } 454 *current = '\0'; 455 456 if (getenv("DEBUG_FIXPATH") != NULL) { 457 fprintf(stderr, "fixpath converted line >%s<\n", line); 458 } 459 460 if(cmd == argc) { 461 if (getenv("DEBUG_FIXPATH") != NULL) { 462 fprintf(stderr, "fixpath no command provided!\n"); 463 } 464 exit(0); 465 } 466 467 ZeroMemory(&si,sizeof(si)); 468 si.cb=sizeof(si); 469 ZeroMemory(&pi,sizeof(pi)); 470 471 fflush(stderr); 472 fflush(stdout); 473 474 rc = CreateProcess(NULL, 475 line, 476 0, 477 0, 478 TRUE, 479 0, 480 NULL, 481 NULL, 482 &si, 483 &pi); 484 if(!rc) { 485 // Could not start process for some reason. Try to report why: 486 report_error("Could not start process!"); 487 exit(126); 488 } 489 490 WaitForSingleObject(pi.hProcess,INFINITE); 491 GetExitCodeProcess(pi.hProcess,&exitCode); 492 493 if (getenv("DEBUG_FIXPATH") != NULL) { 494 for (i=0; i<num_files_to_delete; ++i) { 495 fprintf(stderr, "fixpath Not deleting temporary file %s\n", 496 files_to_delete[i]); 497 } 498 } else { 499 for (i=0; i<num_files_to_delete; ++i) { 500 remove(files_to_delete[i]); 501 } 502 } 503 504 if (exitCode != 0) { 505 if (getenv("DEBUG_FIXPATH") != NULL) { 506 fprintf(stderr, "fixpath exit code %d\n", 507 exitCode); 508 } 509 } 510 511 exit(exitCode); 512} 513