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 */
36 int 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 */
61 char *replace_cygdrive(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
86 void 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 */
100 char *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
122 char *files_to_delete[1024];
123 int num_files_to_delete = 0;
124
125 char *fix_at_file(char *in)
126 {
127 char *tmpdir;
128 char name[2048];
129 char *atname;
130 char *buffer;
131 size_t buflen=65536;
132 size_t used=0;
133 size_t len;
134 int rc;
135 FILE *atout;
136 FILE *atin;
137 char block[2048];
138 size_t blocklen;
139 char *fixed;
140
141 atin = fopen(in+1, "r");
142 if (atin == NULL) {
143 fprintf(stderr, "Could not read at file %s\n", in+1);
144 exit(-1);
145 }
146
147 tmpdir = getenv("TMP");
148 if (tmpdir == NULL) {
149 tmpdir = "c:/cygwin/tmp";
150 }
151 _snprintf(name, sizeof(name), "%s\\atfile_XXXXXX", tmpdir);
152
153 rc = _mktemp_s(name, strlen(name)+1);
154 if (rc) {
155 fprintf(stderr, "Could not create temporary file name for at file!\n");
156 exit(-1);
157 }
158
159 atout = fopen(name, "w");
160 if (atout == NULL) {
161 fprintf(stderr, "Could open temporary file for writing! %s\n", name);
162 exit(-1);
163 }
164
165 buffer = malloc(buflen);
166 while((blocklen = fread(block,1,sizeof(block),atin)) > 0) {
167 append(&buffer, &buflen, &used, block, blocklen);
168 }
169 buffer[used] = 0;
170 fixed = replace_cygdrive(buffer);
171 fwrite(fixed, strlen(fixed), 1, atout);
172 fclose(atin);
173 fclose(atout);
174 free(fixed);
175 free(buffer);
176 files_to_delete[num_files_to_delete] = malloc(strlen(name)+1);
177 strcpy(files_to_delete[num_files_to_delete], name);
178 num_files_to_delete++;
179 atname = malloc(strlen(name)+2);
180 atname[0] = '@';
181 strcpy(atname+1, name);
182 return atname;
183 }
184
185 int main(int argc, char **argv)
186 {
187 STARTUPINFO si;
188 PROCESS_INFORMATION pi;
189 unsigned short rc;
190
191 char *new_at_file;
192 char *old_at_file;
193 char *line;
194 int i;
195 DWORD exitCode;
196
197 if (argc<2) {
198 fprintf(stderr, "Usage: uncygdrive.exe /cygdrive/c/WINDOWS/notepad.exe /cygdrive/c/x/test.txt");
199 exit(0);
200 }
201
202 line = replace_cygdrive(strstr(GetCommandLine(), argv[1]));
203
204 for (i=1; i<argc; ++i) {
205 if (argv[i][0] == '@') {
206 // Found at-file! Fix it!
207 old_at_file = replace_cygdrive(argv[i]);
208 new_at_file = fix_at_file(old_at_file);
209 line = replace_substring(line, old_at_file, new_at_file);
210 }
211 }
212
213 if (getenv("DEBUG_UNCYGDRIVE") != NULL) {
214 fprintf(stderr, "uncygdrive >%s<\n", line);
215 }
216
217 ZeroMemory(&si,sizeof(si));
218 si.cb=sizeof(si);
219 ZeroMemory(&pi,sizeof(pi));
220
221 rc = CreateProcess(NULL,
222 line,
223 0,
224 0,
225 TRUE,
226 0,
227 0,
228 0,
229 &si,
230 &pi);
231 if(!rc)
232 {
233 //Could not start process;
234 fprintf(stderr, "Could not start process!\n");
235 exit(-1);
236 }
237
238 WaitForSingleObject(pi.hProcess,INFINITE);
239 GetExitCodeProcess(pi.hProcess,&exitCode);
240
241 if (getenv("DEBUG_UNCYGDRIVE") != NULL) {
242 for (i=0; i<num_files_to_delete; ++i) {
243 fprintf(stderr, "Not deleting temporary uncygdrive file %s\n",
244 files_to_delete[i]);
245 }
246 }
247 else {
248 for (i=0; i<num_files_to_delete; ++i) {
249 remove(files_to_delete[i]);
250 }
251 }
252
253 exit(exitCode);
254 }