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 /*

  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 #include <Windows.h>

 #include <io.h>

 #include <stdio.h>

 #include <string.h>

 #include <malloc.h>

 /*

  * Test if pos points to /cygdrive/_/ where _ can

  * be any character.

  */

 int is_cygdrive_here(int pos, char *in, int len)

 {

   // Length of /cygdrive/c/ is 12

   if (pos+12 > len) return 0;

   if (in[pos+11]=='/' &&

       in[pos+9]=='/' &&

       in[pos+8]=='e' &&

       in[pos+7]=='v' &&

       in[pos+6]=='i' &&

       in[pos+5]=='r' &&

       in[pos+4]=='d' &&

       in[pos+3]=='g' &&

       in[pos+2]=='y' &&

       in[pos+1]=='c' &&

       in[pos+0]=='/') {

     return 1;

   }

   return 0;

 }

 /*

  * Replace /cygdrive/_/ with _:/

  * Works in place since drive letter is always

  * shorter than /cygdrive/

  */

 char *replace_cygdrive_cygwin(char *in)

 {

   int len = strlen(in);

   char *out = malloc(len+1);

   int i,j;

   if (len < 12) {

     strcpy(out, in);

     return out;

   }

   for (i = 0, j = 0; i<len;) {

     if (is_cygdrive_here(i, in, len)) {

       out[j++] = in[i+10];

       out[j++] = ':';

       i+=11;

     } else {

       out[j] = in[i];

       i++;

       j++;

     }

   }

   out[j] = 0;

   return out;

 }

 void append(char **b, size_t *bl, size_t *u, char *add, size_t addlen)

 {

   while ( (addlen+*u+1) > *bl) {

     *bl *= 2;

     *b = realloc(*b, *bl);

   }

   memcpy(*b+*u, add, addlen);

   *u += addlen;

 }

 /*

  * Creates a new string from in where the first occurance of sub is

  * replaced by rep.

  */

 char *replace_substring(char *in, char *sub, char *rep)

 {

   int in_len = strlen(in);

   int sub_len = strlen(sub);

   int rep_len = strlen(rep);

   char *out = malloc(in_len - sub_len + rep_len + 1);

   char *p;

   if (!(p = strstr(in, sub))) {

     // If sub isn't a substring of in, just return in.

     return in;

   }

   // Copy characters from beginning of in to start of sub.

   strncpy(out, in, p - in);

   out[p - in] = '\0';

   sprintf(out + (p - in), "%s%s", rep, p + sub_len);

   return out;

 }

 char* msys_path_list; // @-separated list of paths prefix to look for

 char* msys_path_list_end; // Points to last \0 in msys_path_list.

 void setup_msys_path_list(char* argument)

 {

   char* p;

   char* drive_letter_pos;

   msys_path_list = strdup(&argument[2]);

   msys_path_list_end = &msys_path_list[strlen(msys_path_list)];

   // Convert all at-sign (@) in path list to \0.

   // @ was chosen as separator to minimize risk of other tools messing around with it

   p = msys_path_list;

   do {

     if (p[1] == ':') {

       // msys has mangled our path list, restore it from c:/... to /c/...

       drive_letter_pos = p+1;

       *drive_letter_pos = *p;

       *p = '/';

     }

     // Look for an @ in the list

     p = strchr(p, '@');

     if (p != NULL) {

       *p = '\0';

       p++;

     }

   } while (p != NULL);

 }

 char *replace_cygdrive_msys(char *in)

 {

   char* str;

   char* prefix;

   char* p;

   str = strdup(in);

   // For each prefix in the path list, search for it and replace /c/... with c:/...

   for (prefix = msys_path_list; prefix < msys_path_list_end && prefix != NULL; prefix += strlen(prefix)+1) {

     p=str;

     while ((p = strstr(p, prefix))) {

       char* drive_letter = p+1;

       *p = *drive_letter;

       *drive_letter = ':';

       p++;

     }

   }

   return str;

 }

 char*(*replace_cygdrive)(char *in) = NULL;

 char *files_to_delete[1024];

 int num_files_to_delete = 0;

 char *fix_at_file(char *in)

 {

   char *tmpdir;

   char name[2048];

   char *atname;

   char *buffer;

   size_t buflen=65536;

   size_t used=0;

   size_t len;

   int rc;

   FILE *atout;

   FILE *atin;

   char block[2048];

   size_t blocklen;

   char *fixed;

   atin = fopen(in+1, "r");

   if (atin == NULL) {

     fprintf(stderr, "Could not read at file %s\n", in+1);

     exit(-1);

   }

   tmpdir = getenv("TMP");

   if (tmpdir == NULL) {

     tmpdir = "c:/cygwin/tmp";

   }

   _snprintf(name, sizeof(name), "%s\\atfile_XXXXXX", tmpdir);

   rc = _mktemp_s(name, strlen(name)+1);

   if (rc) {

     fprintf(stderr, "Could not create temporary file name for at file!\n");

     exit(-1);

   }

   atout = fopen(name, "w");

   if (atout == NULL) {

     fprintf(stderr, "Could not open temporary file for writing! %s\n", name);

     exit(-1);

   }

   buffer = malloc(buflen);

   while((blocklen = fread(block,1,sizeof(block),atin)) > 0) {

     append(&buffer, &buflen, &used, block, blocklen);

   }

   buffer[used] = 0;

   if (getenv("DEBUG_FIXPATH") != NULL) {

     fprintf(stderr, "fixpath input from @-file %s: %s\n", &in[1], buffer);

   }

   fixed = replace_cygdrive(buffer);

   if (getenv("DEBUG_FIXPATH") != NULL) {

     fprintf(stderr, "fixpath converted to @-file %s is: %s\n", name, fixed);

   }

   fwrite(fixed, strlen(fixed), 1, atout);

   fclose(atin);

   fclose(atout);

   free(fixed);

   free(buffer);

   files_to_delete[num_files_to_delete] = malloc(strlen(name)+1);

   strcpy(files_to_delete[num_files_to_delete], name);

   num_files_to_delete++;

   atname = malloc(strlen(name)+2);

   atname[0] = '@';

   strcpy(atname+1, name);

   return atname;

 }

 int main(int argc, char **argv)

 {

     STARTUPINFO si;

     PROCESS_INFORMATION pi;

     unsigned short rc;

     char *new_at_file;

     char *old_at_file;

     char *line;

     int i;

     DWORD exitCode;

     if (argc<3 || argv[1][0] != '-' || (argv[1][1] != 'c' && argv[1][1] != 'm')) {

         fprintf(stderr, "Usage: fixpath -c|m<path@path@...> /cygdrive/c/WINDOWS/notepad.exe /cygdrive/c/x/test.txt");

         exit(0);

     }

     if (getenv("DEBUG_FIXPATH") != NULL) {

       fprintf(stderr, "fixpath input line >%s<\n", strstr(GetCommandLine(), argv[1]));

     }

     if (argv[1][1] == 'c' && argv[1][2] == '\0') {

       if (getenv("DEBUG_FIXPATH") != NULL) {

         fprintf(stderr, "using cygwin mode\n");

       }

       replace_cygdrive = replace_cygdrive_cygwin;

     } else if (argv[1][1] == 'm') {

       if (getenv("DEBUG_FIXPATH") != NULL) {

         fprintf(stderr, "using msys mode, with path list: %s\n", &argv[1][2]);

       }

       setup_msys_path_list(argv[1]);

       replace_cygdrive = replace_cygdrive_msys;

     } else {

       fprintf(stderr, "Unknown mode: %s\n", argv[1]);

       exit(-1);

     }

     line = replace_cygdrive(strstr(GetCommandLine(), argv[2]));

     for (i=1; i<argc; ++i) {

        if (argv[i][0] == '@') {

           // Found at-file! Fix it!

           old_at_file = replace_cygdrive(argv[i]);

           new_at_file = fix_at_file(old_at_file);

           line = replace_substring(line, old_at_file, new_at_file);

        }

     }

     if (getenv("DEBUG_FIXPATH") != NULL) {

       fprintf(stderr, "fixpath converted line >%s<\n", line);

     }

     ZeroMemory(&si,sizeof(si));

     si.cb=sizeof(si);

     ZeroMemory(&pi,sizeof(pi));

     rc = CreateProcess(NULL,

                        line,

                        0,

                        0,

                        TRUE,

                        0,

                        0,

                        0,

                        &si,

                        &pi);

     if(!rc)

     {

       //Could not start process;

       fprintf(stderr, "Could not start process!\n");

       exit(-1);

     }

     WaitForSingleObject(pi.hProcess,INFINITE);

     GetExitCodeProcess(pi.hProcess,&exitCode);

     if (getenv("DEBUG_FIXPATH") != NULL) {

       for (i=0; i<num_files_to_delete; ++i) {

         fprintf(stderr, "Not deleting temporary fixpath file %s\n",

                 files_to_delete[i]);

       }

     }

     else {

       for (i=0; i<num_files_to_delete; ++i) {

         remove(files_to_delete[i]);

       }

     }

     exit(exitCode);

 }