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 <stdbool.h>
28 #include <io.h>
29 #include <stdio.h>
30 #include <string.h>
31 #include <malloc.h>
32
33 void report_error(char const * msg)
34 {
35 LPVOID lpMsgBuf;
36 DWORD dw = GetLastError();
37
38 FormatMessage(
39 FORMAT_MESSAGE_ALLOCATE_BUFFER |
40 FORMAT_MESSAGE_FROM_SYSTEM |
41 FORMAT_MESSAGE_IGNORE_INSERTS,
42 NULL,
43 dw,
44 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
45 (LPTSTR) &lpMsgBuf,
46 0,
47 NULL);
48
49 fprintf(stderr,
50 "%s Failed with error %d: %s\n",
51 msg, dw, lpMsgBuf);
52
53 LocalFree(lpMsgBuf);
54 }
55
56 /*
57 * Test if pos points to /prefix/_/ where _ can
58 * be any character.
59 */
60 int is_prefix_here(int pos, char const *in, int len, const char* prefix)
61 {
62 // Length of c/ is 2
63 int prefix_size = strlen(prefix);
64 if (pos+prefix_size+2 > len) return 0;
65 if (in[pos+prefix_size+1]=='/') {
66 return strncmp(in + pos, prefix, prefix_size) == 0;
67 }
68 return 0;
69 }
70
71 /*
72 * Replace /cygdrive/_/ with _:/
73 * Works in place since drive letter is always
74 * shorter than /cygdrive/
75 */
76 char *replace_cygdrive_cygwin(char const *in)
77 {
78 size_t len = strlen(in);
79 char *out = (char*) malloc(len+1);
80 int i,j;
81
82 if (len < 12) {
83 memmove(out, in, len + 1);
84 return out;
85 }
86
87 for (i = 0, j = 0; i<len;) {
88 if (is_prefix_here(i, in, len, "/cygdrive/")) {
89 out[j++] = in[i+10];
90 out[j++] = ':';
91 i+=11;
92 } else {
93 out[j] = in[i];
94 i++;
95 j++;
96 }
97 }
98 out[j] = '\0';
99 return out;
100 }
101
102 void append(char **b, size_t *bl, size_t *u, char *add, size_t addlen)
103 {
104 while ((addlen+*u+1) > *bl) {
105 *bl *= 2;
106 *b = (char*) realloc(*b, *bl);
107 }
108 memcpy(*b+*u, add, addlen);
109 *u += addlen;
110 }
111
112 /*
113 * Creates a new string from in where the first occurrence of sub is
114 * replaced by rep.
115 */
116 char *replace_substring(char *in, char *sub, char *rep)
117 {
118 int in_len = strlen(in);
119 int sub_len = strlen(sub);
120 int rep_len = strlen(rep);
121 char *out = (char *) malloc(in_len - sub_len + rep_len + 1);
122 char *p;
123
124 if (!(p = strstr(in, sub))) {
125 // If sub isn't a substring of in, just return in.
126 return in;
127 }
128
129 // Copy characters from beginning of in to start of sub.
130 strncpy(out, in, p - in);
131 out[p - in] = '\0';
132
133 sprintf(out + (p - in), "%s%s", rep, p + sub_len);
134
135 return out;
136 }
137
138 char* msys_path_list; // @-separated list of paths prefix to look for
139 char* msys_path_list_end; // Points to last \0 in msys_path_list.
140
141 void setup_msys_path_list(char const * argument)
142 {
143 char* p;
144 char* drive_letter_pos;
145
146 msys_path_list = strdup(&argument[2]);
147 msys_path_list_end = &msys_path_list[strlen(msys_path_list)];
148
149 // Convert all at-sign (@) in path list to \0.
150 // @ was chosen as separator to minimize risk of other tools messing around with it
151 p = msys_path_list;
152 do {
153 if (p[1] == ':') {
154 // msys has mangled our path list, restore it from c:/... to /c/...
155 drive_letter_pos = p+1;
156 *drive_letter_pos = *p;
157 *p = '/';
158 }
159
160 // Look for an @ in the list
161 p = strchr(p, '@');
162 if (p != NULL) {
163 *p = '\0';
164 p++;
165 }
166 } while (p != NULL);
167 }
168
169 char *replace_cygdrive_msys(char const *in)
170 {
171 char* str;
172 char* prefix;
173 char* p;
174
175 str = strdup(in);
176
177 // For each prefix in the path list, search for it and replace /c/... with c:/...
178 for (prefix = msys_path_list; prefix < msys_path_list_end && prefix != NULL; prefix += strlen(prefix)+1) {
179 p=str;
180 while ((p = strstr(p, prefix))) {
181 char* drive_letter = p+1;
182 *p = *drive_letter;
183 *drive_letter = ':';
184 p++;
185 }
186 }
187
188 return str;
189 }
190
191 /*
192 * Replace /mnt/_/ with _:/
193 * Works in place since drive letter is always
194 * shorter than /mnt/
195 */
196 char *replace_cygdrive_wsl(char const *in)
197 {
198 size_t len = strlen(in);
199 char *out = (char*) malloc(len+1);
200 int i,j;
201
202 if (len < 7) {
203 memmove(out, in, len + 1);
204 return out;
205 }
206
207 for (i = 0, j = 0; i<len;) {
208 if (is_prefix_here(i, in, len, "/mnt/")) {
209 out[j++] = in[i+5];
210 out[j++] = ':';
211 i+=6;
212 } else {
213 out[j] = in[i];
214 i++;
215 j++;
216 }
217 }
218 out[j] = '\0';
219 return out;
220 }
221
222 char*(*replace_cygdrive)(char const *in) = NULL;
223 bool debug_fixpath = false;
224
225 char *files_to_delete[1024];
226 int num_files_to_delete = 0;
227
228 char *fix_at_file(char const *in)
229 {
230 char *tmpdir;
231 char name[2048];
232 char *atname;
233 char *buffer;
234 size_t buflen=65536;
235 size_t used=0;
236 size_t len;
237 int rc;
238 FILE *atout;
239 FILE *atin;
240 char block[2048];
241 size_t blocklen;
242 char *fixed;
243
244 atin = fopen(in+1, "r");
245 if (atin == NULL) {
246 fprintf(stderr, "Could not read at file %s\n", in+1);
247 exit(-1);
248 }
249
250 tmpdir = getenv("TEMP");
251 if (tmpdir == NULL) {
252 #if _WIN64
253 tmpdir = "c:/cygwin64/tmp";
254 #else
255 tmpdir = "c:/cygwin/tmp";
256 #endif
257 }
258 _snprintf(name, sizeof(name), "%s\\atfile_XXXXXX", tmpdir);
259
260 rc = _mktemp_s(name, strlen(name)+1);
261 if (rc) {
262 fprintf(stderr, "Could not create temporary file name for at file!\n");
263 exit(-1);
264 }
265
266 atout = fopen(name, "w");
267 if (atout == NULL) {
268 fprintf(stderr, "Could not open temporary file for writing! %s\n", name);
269 exit(-1);
270 }
271
272 buffer = (char*) malloc(buflen);
273 while ((blocklen = fread(block, 1, sizeof(block), atin)) > 0) {
274 append(&buffer, &buflen, &used, block, blocklen);
275 }
276 buffer[used] = 0;
277 if (debug_fixpath) {
278 fprintf(stderr, "fixpath input from @-file %s: %s\n", &in[1], buffer);
279 }
280 fixed = replace_cygdrive(buffer);
281 if (debug_fixpath) {
282 fprintf(stderr, "fixpath converted to @-file %s is: %s\n", name, fixed);
283 }
284 fwrite(fixed, strlen(fixed), 1, atout);
285 fclose(atin);
286 fclose(atout);
287 free(fixed);
288 free(buffer);
289 files_to_delete[num_files_to_delete] = (char*) malloc(strlen(name)+1);
290 strcpy(files_to_delete[num_files_to_delete], name);
291 num_files_to_delete++;
292 atname = (char*) malloc(strlen(name)+2);
293 atname[0] = '@';
294 strcpy(atname+1, name);
295 return atname;
296 }
297
298 // given an argument, convert it to the windows command line safe quoted version
299 // using rules from:
300 // http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23/everyone-quotes-arguments-the-wrong-way.aspx
301 // caller is responsible for freeing both input and output.
302 char * quote_arg(char const * in_arg) {
303 char *quoted = NULL;
304 char *current = quoted;
305 int pass;
306
307 if (strlen(in_arg) == 0) {
308 // empty string? explicitly quote it.
309 return _strdup("\"\"");
310 }
311
312 if (strpbrk(in_arg, " \t\n\v\r\\\"") == NULL) {
313 return _strdup(in_arg);
314 }
315
316 // process the arg twice. Once to calculate the size and then to copy it.
317 for (pass=1; pass<=2; pass++) {
318 char const *arg = in_arg;
319
320 // initial "
321 if (pass == 2) {
322 *current = '\"';
323 }
324 current++;
325
326 // process string to be quoted until NUL
327 do {
328 int escapes = 0;
329
330 while (*arg == '\\') {
331 // count escapes.
332 escapes++;
333 arg++;
334 }
335
336 if (*arg == '\0') {
337 // escape the escapes before final "
338 escapes *= 2;
339 } else if (*arg == '"') {
340 // escape the escapes and the "
341 escapes = escapes * 2 + 1;
342 } else {
343 // escapes aren't special, just echo them.
344 }
345
346 // emit some escapes
347 while (escapes > 0) {
348 if (pass == 2) {
349 *current = '\\';
350 }
351 current++;
352 escapes--;
353 }
354
355 // and the current char
356 if (pass == 2) {
357 *current = *arg;
358 }
359 current++;
360 } while (*arg++ != '\0');
361
362 // allocate the buffer
363 if (pass == 1) {
364 size_t alloc = (size_t) (current - quoted + (ptrdiff_t) 2);
365 current = quoted = (char*) calloc(alloc, sizeof(char));
366 }
367 }
368
369 // final " and \0
370 *(current - 1) = '"';
371 *current = '\0';
372
373 return quoted;
374 }
375
376 int main(int argc, char const ** argv)
377 {
378 STARTUPINFO si;
379 PROCESS_INFORMATION pi;
380 unsigned short rc;
381
382 char *line;
383 char *current;
384 int i, cmd;
385 DWORD exitCode = 0;
386 DWORD processFlags = 0;
387 BOOL processInheritHandles = TRUE;
388 BOOL waitForChild = TRUE;
389 char* fixpathPath;
390
391 debug_fixpath = (getenv("DEBUG_FIXPATH") != NULL);
392
393 if (argc<2 || argv[1][0] != '-' || (argv[1][1] != 'c' && argv[1][1] != 'm' && argv[1][1] != 'w')) {
394 fprintf(stderr, "Usage: fixpath -c|m|w<path@path@...> [--detach] /cygdrive/c/WINDOWS/notepad.exe [/cygdrive/c/x/test.txt|@/cygdrive/c/x/atfile]\n");
395 exit(0);
396 }
397
398 if (debug_fixpath) {
399 char const * cmdline = GetCommandLine();
400 fprintf(stderr, "fixpath input line >%s<\n", strstr(cmdline, argv[1]));
401 }
402
403 if (argv[1][1] == 'c' && argv[1][2] == '\0') {
404 if (debug_fixpath) {
405 fprintf(stderr, "fixpath using cygwin mode\n");
406 }
407 replace_cygdrive = replace_cygdrive_cygwin;
408 } else if (argv[1][1] == 'm') {
409 if (debug_fixpath) {
410 fprintf(stderr, "fixpath using msys mode, with path list: %s\n", &argv[1][2]);
411 }
412 setup_msys_path_list(argv[1]);
413 replace_cygdrive = replace_cygdrive_msys;
414 } else if (argv[1][1] == 'w') {
415 if (debug_fixpath) {
416 fprintf(stderr, "fixpath using wsl mode, with path list: %s\n", &argv[1][2]);
417 }
418 replace_cygdrive = replace_cygdrive_wsl;
419 } else {
420 fprintf(stderr, "fixpath Unknown mode: %s\n", argv[1]);
421 exit(-1);
422 }
423
424 if (argv[2][0] == '-') {
425 if (strcmp(argv[2], "--detach") == 0) {
426 if (debug_fixpath) {
427 fprintf(stderr, "fixpath in detached mode\n");
428 }
429 processFlags |= DETACHED_PROCESS;
430 processInheritHandles = FALSE;
431 waitForChild = FALSE;
432 } else {
433 fprintf(stderr, "fixpath Unknown argument: %s\n", argv[2]);
434 exit(-1);
435 }
436 i = 3;
437 } else {
438 i = 2;
439 }
440
441 // handle assignments
442 while (i < argc) {
443 char const * assignment = strchr(argv[i], '=');
444 if (assignment != NULL && assignment != argv[i]) {
445 size_t var_len = (size_t) (assignment - argv[i] + (ptrdiff_t) 1);
446 char *var = (char *) calloc(var_len, sizeof(char));
447 char *val = replace_cygdrive(assignment + 1);
448 memmove(var, argv[i], var_len);
449 var[var_len - 1] = '\0';
450 strupr(var);
451
452 if (debug_fixpath) {
453 fprintf(stderr, "fixpath setting var >%s< to >%s<\n", var, val);
454 }
455
456 rc = SetEnvironmentVariable(var, val);
457 if (!rc) {
458 // Could not set var for some reason. Try to report why.
459 const int msg_len = 80 + var_len + strlen(val);
460 char * msg = (char *) alloca(msg_len);
461 _snprintf_s(msg, msg_len, _TRUNCATE, "Could not set environment variable [%s=%s]", var, val);
462 report_error(msg);
463 exit(1);
464 }
465 free(var);
466 free(val);
467 } else {
468 // no more assignments;
469 break;
470 }
471 i++;
472 }
473
474 // remember index of the command
475 cmd = i;
476
477 // handle command and it's args.
478 while (i < argc) {
479 char const *replaced = replace_cygdrive(argv[i]);
480 if (replaced[0] == '@') {
481 if (waitForChild == FALSE) {
482 fprintf(stderr, "fixpath Cannot use @-files in detached mode: %s\n", replaced);
483 exit(1);
484 }
485 // Found at-file! Fix it!
486 replaced = fix_at_file(replaced);
487 }
488 argv[i] = quote_arg(replaced);
489 i++;
490 }
491
492 // determine the length of the line
493 line = NULL;
494 // args
495 for (i = cmd; i < argc; i++) {
496 line += (ptrdiff_t) strlen(argv[i]);
497 }
498 // spaces and null
499 line += (ptrdiff_t) (argc - cmd + 1);
500 // allocate
501 line = (char*) calloc(line - (char*) NULL, sizeof(char));
502
503 // copy in args.
504 current = line;
505 for (i = cmd; i < argc; i++) {
506 ptrdiff_t len = strlen(argv[i]);
507 if (i != cmd) {
508 *current++ = ' ';
509 }
510 memmove(current, argv[i], len);
511 current += len;
512 }
513 *current = '\0';
514
515 if (debug_fixpath) {
516 fprintf(stderr, "fixpath converted line >%s<\n", line);
517 }
518
519 if (cmd == argc) {
520 if (debug_fixpath) {
521 fprintf(stderr, "fixpath no command provided!\n");
522 }
523 exit(0);
524 }
525
526 ZeroMemory(&si, sizeof(si));
527 si.cb=sizeof(si);
528 ZeroMemory(&pi, sizeof(pi));
529
530 fflush(stderr);
531 fflush(stdout);
532
533 fixpathPath = calloc(32767, sizeof(char));
534 rc = GetEnvironmentVariable("FIXPATH_PATH", fixpathPath, 32767);
535 if (rc) {
536 if (debug_fixpath) {
537 fprintf(stderr, "Setting Path to FIXPATH_PATH: %s\n", fixpathPath);
538 }
539 rc = SetEnvironmentVariable("Path", fixpathPath);
540 if (!rc) {
541 // Could not set Path for some reason. Try to report why.
542 const int msg_len = 80 + strlen(fixpathPath);
543 char * msg = (char *)alloca(msg_len);
544 _snprintf_s(msg, msg_len, _TRUNCATE, "Could not set environment variable [Path=%s]", fixpathPath);
545 report_error(msg);
546 exit(1);
547 }
548 }
549
550 rc = CreateProcess(NULL,
551 line,
552 0,
553 0,
554 processInheritHandles,
555 processFlags,
556 NULL,
557 NULL,
558 &si,
559 &pi);
560 if (!rc) {
561 // Could not start process for some reason. Try to report why:
562 report_error("Could not start process!");
563 exit(126);
564 }
565
566 if (waitForChild == TRUE) {
567 WaitForSingleObject(pi.hProcess, INFINITE);
568 GetExitCodeProcess(pi.hProcess, &exitCode);
569
570 if (debug_fixpath) {
571 for (i=0; i<num_files_to_delete; ++i) {
572 fprintf(stderr, "fixpath Not deleting temporary file %s\n",
573 files_to_delete[i]);
574 }
575 } else {
576 for (i=0; i<num_files_to_delete; ++i) {
577 remove(files_to_delete[i]);
578 }
579 }
580
581 if (exitCode != 0) {
582 if (debug_fixpath) {
583 fprintf(stderr, "fixpath exit code %d\n",
584 exitCode);
585 }
586 }
587 } else {
588 if (debug_fixpath) {
589 fprintf(stderr, "fixpath Not waiting for child process");
590 }
591 }
592
593 exit(exitCode);
594 }