fixpath.c revision 492:e64f2cb57d05 
1/*
2 * Copyright (c) 2011, 2012, 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
32/*
33 * Test if pos points to /cygdrive/_/ where _ can
34 * be any character.
35 */
36int is_cygdrive_here(int pos, char *in, int len)
37{
38  // Length of /cygdrive/c/ is 12
39  if (pos+12 > len) return 0;
40  if (in[pos+11]=='/' &&
41      in[pos+9]=='/' &&
42      in[pos+8]=='e' &&
43      in[pos+7]=='v' &&
44      in[pos+6]=='i' &&
45      in[pos+5]=='r' &&
46      in[pos+4]=='d' &&
47      in[pos+3]=='g' &&
48      in[pos+2]=='y' &&
49      in[pos+1]=='c' &&
50      in[pos+0]=='/') {
51    return 1;
52  }
53  return 0;
54}
55
56/*
57 * Replace /cygdrive/_/ with _:/
58 * Works in place since drive letter is always
59 * shorter than /cygdrive/
60 */
61char *replace_cygdrive_cygwin(char *in)
62{
63  int len = strlen(in);
64  char *out = malloc(len+1);
65  int i,j;
66
67  if (len < 12) {
68    strcpy(out, in);
69    return out;
70  }
71  for (i = 0, j = 0; i<len;) {
72    if (is_cygdrive_here(i, in, len)) {
73      out[j++] = in[i+10];
74      out[j++] = ':';
75      i+=11;
76    } else {
77      out[j] = in[i];
78      i++;
79      j++;
80    }
81  }
82  out[j] = 0;
83  return out;
84}
85
86void append(char **b, size_t *bl, size_t *u, char *add, size_t addlen)
87{
88  while ( (addlen+*u+1) > *bl) {
89    *bl *= 2;
90    *b = realloc(*b, *bl);
91  }
92  memcpy(*b+*u, add, addlen);
93  *u += addlen;
94}
95
96/*
97 * Creates a new string from in where the first occurance of sub is
98 * replaced by rep.
99 */
100char *replace_substring(char *in, char *sub, char *rep)
101{
102  int in_len = strlen(in);
103  int sub_len = strlen(sub);
104  int rep_len = strlen(rep);
105  char *out = malloc(in_len - sub_len + rep_len + 1);
106  char *p;
107
108  if (!(p = strstr(in, sub))) {
109    // If sub isn't a substring of in, just return in.
110    return in;
111  }
112
113  // Copy characters from beginning of in to start of sub.
114  strncpy(out, in, p - in);
115  out[p - in] = '\0';
116
117  sprintf(out + (p - in), "%s%s", rep, p + sub_len);
118
119  return out;
120}
121
122char* msys_path_list; // @-separated list of paths prefix to look for
123char* msys_path_list_end; // Points to last \0 in msys_path_list.
124
125void setup_msys_path_list(char* argument)
126{
127  char* p;
128  char* drive_letter_pos;
129
130  msys_path_list = strdup(&argument[2]);
131  msys_path_list_end = &msys_path_list[strlen(msys_path_list)];
132
133  // Convert all at-sign (@) in path list to \0.
134  // @ was chosen as separator to minimize risk of other tools messing around with it
135  p = msys_path_list;
136  do {
137    if (p[1] == ':') {
138      // msys has mangled our path list, restore it from c:/... to /c/...
139      drive_letter_pos = p+1;
140      *drive_letter_pos = *p;
141      *p = '/';
142    }
143
144    // Look for an @ in the list
145    p = strchr(p, '@');
146    if (p != NULL) {
147      *p = '\0';
148      p++;
149    }
150  } while (p != NULL);
151}
152
153char *replace_cygdrive_msys(char *in)
154{
155  char* str;
156  char* prefix;
157  char* p;
158
159  str = strdup(in);
160
161  // For each prefix in the path list, search for it and replace /c/... with c:/...
162  for (prefix = msys_path_list; prefix < msys_path_list_end && prefix != NULL; prefix += strlen(prefix)+1) {
163    p=str;
164    while ((p = strstr(p, prefix))) {
165      char* drive_letter = p+1;
166      *p = *drive_letter;
167      *drive_letter = ':';
168      p++;
169    }
170  }
171
172  return str;
173}
174
175char*(*replace_cygdrive)(char *in) = NULL;
176
177char *files_to_delete[1024];
178int num_files_to_delete = 0;
179
180char *fix_at_file(char *in)
181{
182  char *tmpdir;
183  char name[2048];
184  char *atname;
185  char *buffer;
186  size_t buflen=65536;
187  size_t used=0;
188  size_t len;
189  int rc;
190  FILE *atout;
191  FILE *atin;
192  char block[2048];
193  size_t blocklen;
194  char *fixed;
195
196  atin = fopen(in+1, "r");
197  if (atin == NULL) {
198    fprintf(stderr, "Could not read at file %s\n", in+1);
199    exit(-1);
200  }
201
202  tmpdir = getenv("TMP");
203  if (tmpdir == NULL) {
204    tmpdir = "c:/cygwin/tmp";
205  }
206  _snprintf(name, sizeof(name), "%s\\atfile_XXXXXX", tmpdir);
207
208  rc = _mktemp_s(name, strlen(name)+1);
209  if (rc) {
210    fprintf(stderr, "Could not create temporary file name for at file!\n");
211    exit(-1);
212  }
213
214  atout = fopen(name, "w");
215  if (atout == NULL) {
216    fprintf(stderr, "Could not open temporary file for writing! %s\n", name);
217    exit(-1);
218  }
219
220  buffer = malloc(buflen);
221  while((blocklen = fread(block,1,sizeof(block),atin)) > 0) {
222    append(&buffer, &buflen, &used, block, blocklen);
223  }
224  buffer[used] = 0;
225  if (getenv("DEBUG_FIXPATH") != NULL) {
226    fprintf(stderr, "fixpath input from @-file %s: %s\n", &in[1], buffer);
227  }
228  fixed = replace_cygdrive(buffer);
229  if (getenv("DEBUG_FIXPATH") != NULL) {
230    fprintf(stderr, "fixpath converted to @-file %s is: %s\n", name, fixed);
231  }
232  fwrite(fixed, strlen(fixed), 1, atout);
233  fclose(atin);
234  fclose(atout);
235  free(fixed);
236  free(buffer);
237  files_to_delete[num_files_to_delete] = malloc(strlen(name)+1);
238  strcpy(files_to_delete[num_files_to_delete], name);
239  num_files_to_delete++;
240  atname = malloc(strlen(name)+2);
241  atname[0] = '@';
242  strcpy(atname+1, name);
243  return atname;
244}
245
246int main(int argc, char **argv)
247{
248    STARTUPINFO si;
249    PROCESS_INFORMATION pi;
250    unsigned short rc;
251
252    char *new_at_file;
253    char *old_at_file;
254    char *line;
255    int i;
256    DWORD exitCode;
257
258    if (argc<3 || argv[1][0] != '-' || (argv[1][1] != 'c' && argv[1][1] != 'm')) {
259        fprintf(stderr, "Usage: fixpath -c|m<path@path@...> /cygdrive/c/WINDOWS/notepad.exe /cygdrive/c/x/test.txt");
260        exit(0);
261    }
262
263    if (getenv("DEBUG_FIXPATH") != NULL) {
264      fprintf(stderr, "fixpath input line >%s<\n", strstr(GetCommandLine(), argv[1]));
265    }
266
267    if (argv[1][1] == 'c' && argv[1][2] == '\0') {
268      if (getenv("DEBUG_FIXPATH") != NULL) {
269        fprintf(stderr, "using cygwin mode\n");
270      }
271      replace_cygdrive = replace_cygdrive_cygwin;
272    } else if (argv[1][1] == 'm') {
273      if (getenv("DEBUG_FIXPATH") != NULL) {
274        fprintf(stderr, "using msys mode, with path list: %s\n", &argv[1][2]);
275      }
276      setup_msys_path_list(argv[1]);
277      replace_cygdrive = replace_cygdrive_msys;
278    } else {
279      fprintf(stderr, "Unknown mode: %s\n", argv[1]);
280      exit(-1);
281    }
282    line = replace_cygdrive(strstr(GetCommandLine(), argv[2]));
283
284    for (i=1; i<argc; ++i) {
285       if (argv[i][0] == '@') {
286          // Found at-file! Fix it!
287          old_at_file = replace_cygdrive(argv[i]);
288          new_at_file = fix_at_file(old_at_file);
289          line = replace_substring(line, old_at_file, new_at_file);
290       }
291    }
292
293    if (getenv("DEBUG_FIXPATH") != NULL) {
294      fprintf(stderr, "fixpath converted line >%s<\n", line);
295    }
296
297    ZeroMemory(&si,sizeof(si));
298    si.cb=sizeof(si);
299    ZeroMemory(&pi,sizeof(pi));
300
301    rc = CreateProcess(NULL,
302                       line,
303                       0,
304                       0,
305                       TRUE,
306                       0,
307                       0,
308                       0,
309                       &si,
310                       &pi);
311    if(!rc)
312    {
313      //Could not start process;
314      fprintf(stderr, "Could not start process!\n");
315      exit(-1);
316    }
317
318    WaitForSingleObject(pi.hProcess,INFINITE);
319    GetExitCodeProcess(pi.hProcess,&exitCode);
320
321    if (getenv("DEBUG_FIXPATH") != NULL) {
322      for (i=0; i<num_files_to_delete; ++i) {
323        fprintf(stderr, "Not deleting temporary fixpath file %s\n",
324                files_to_delete[i]);
325      }
326    }
327    else {
328      for (i=0; i<num_files_to_delete; ++i) {
329        remove(files_to_delete[i]);
330      }
331    }
332
333    exit(exitCode);
334}
335