source: main/trunk/search4j/libsearch4j.cpp@ 29357

Last change on this file since 29357 was 28699, checked in by ak19, 10 years ago

Jeremy (jts21) has fixed a bug in search4j. In the past the -m flag to set the minimum Java version needed to be of the form 1.8.0_0 and could not accept 1.8.0 and would crash. Now the java minor and update version numbers are optional.
File size: 10.7 KB
Line 
1/*
2* Library of functions for the Search4j utility
3*/
4
5#include "libsearch4j.h"
6
7
8#ifdef WINDOWS
9//minimal launch4j stuff
10#define NO_JAVA_FOUND 0
11#define FOUND_JRE 1
12#define FOUND_SDK 2
13
14//windows functions
15#define popen _popen
16#define pclose _pclose
17#define strcmp _stricmp
18
19#endif /* WINDOWS */
20
21void replace_all ( std::string & str, std::string const & pattern, std::string const & replacement ) {
22
23 std::string::size_type start = str.find( pattern, 0 );
24
25 while ( start != str.npos ) {
26 str.replace( start, pattern.size(), replacement );
27 start = str.find( pattern, start+replacement.size() );
28 }
29
30}
31
32
33int process( string command, bool render ) {
34
35 #ifdef WINDOWS
36
37 STARTUPINFO si;
38 PROCESS_INFORMATION pi;
39 memset(&pi, 0, sizeof(pi));
40 memset(&si, 0, sizeof(si));
41 si.cb = sizeof(si);
42
43 DWORD dwExitCode = -1;
44 char* cmd = (char*)command.c_str();
45
46 bool result;
47 if ( render ) {
48 result = CreateProcess(NULL, cmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
49 } else {
50 result = CreateProcess(NULL, cmd, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi);
51 }
52
53 if ( result ) {
54 WaitForSingleObject(pi.hProcess, INFINITE);
55 GetExitCodeProcess(pi.hProcess, &dwExitCode);
56 CloseHandle(pi.hThread);
57 CloseHandle(pi.hProcess);
58 }
59 return dwExitCode;
60
61 #else
62
63 return system( command.c_str() );
64
65 #endif
66}
67
68
69
70int process_and_catch_output( string command, string &output ) {
71
72 FILE *pPipe;
73
74 char cmd[1024];
75 strcpy(cmd, command.c_str());
76 strcat(cmd, " 2>&1" );
77
78 //if ( verbose ) cout << "process(): running '" << command << "'" << endl;
79#ifdef WINDOWS
80 if( (pPipe = _popen( cmd, "rt" )) == NULL ) {
81 _pclose( pPipe );
82#else
83 if( (pPipe = popen( cmd, "r" )) == NULL ) {
84 pclose( pPipe );
85#endif
86 return -1;
87 }
88 //if ( verbose ) cout << "started process" << endl;
89
90 /* Read pipe until end of file. */
91 while( !feof( pPipe ) ) {
92 char psBuffer[128];
93 //if ( verbose ) cout << "get some data" << endl;
94 if( fgets( psBuffer, 128, pPipe ) != NULL ) {
95
96 //if ( verbose ) cout << "got: " << psBuffer << endl;
97 output.append( psBuffer );
98
99 } else {
100 //if ( verbose ) cout << "none left" << endl;
101 }
102
103 }
104
105 /* Close pipe and return return value of pPipe. */
106#ifdef WINDOWS
107 int code = _pclose( pPipe );
108#else
109 int code = pclose( pPipe );
110#endif
111
112 return code;
113
114}
115
116//Jvm class methods
117
118Jvm::Jvm()
119 : era_(1), major_(0), minor_(0), update_(0),
120 javaHome_(),
121 isJdk_(false), healthy_(false)
122{}
123
124Jvm::~Jvm()
125{
126 // javaHome automatically destructed
127}
128
129
130void Jvm::setJavaHome( string jh ) {
131 healthy_ = true;
132 javaHome_ = jh;
133 setVersionFromExeOuput();
134 setIsJdkFromJavacPresence();
135}
136
137string Jvm::getJavaHome() {
138 return javaHome_;
139}
140
141string Jvm::getExecutable() {
142 string exec = "";
143 exec.append( javaHome_ );
144
145 #ifdef WINDOWS
146 exec.append( "\\bin\\java.exe" );
147 #endif
148
149 #ifndef WINDOWS
150 exec.append( "/bin/java" );
151 #endif
152
153 return exec;
154}
155
156#ifdef WINDOWS
157string Jvm::getWinExecutable() {
158 string exec = "";
159 exec.append( javaHome_ );
160 exec.append( "\\bin\\javaw.exe" );
161 return exec;
162}
163#endif
164
165
166string Jvm::getVersion() {
167 stringstream ss;
168 ss << era_ << "." << major_ << "." << minor_ << "_" << update_;
169 return ss.str();
170}
171
172bool Jvm::check() {
173 return healthy_;
174}
175
176bool Jvm::setVersionFromString( string version ) {
177 era_ = atoi( version.substr(0,1).c_str() );
178 major_ = atoi( version.substr(2,1).c_str() );
179 if(version.length() >= 5) {
180 minor_ = atoi( version.substr(4,1).c_str() );
181 } else {
182 minor_ = 0;
183 }
184 if(version.length() >= 7) {
185 update_ = atoi( version.substr(6,2).c_str() );
186 } else {
187 update_ = 0;
188 }
189 return true;
190}
191
192int Jvm::compare( Jvm otherJvm ) {
193 //era
194 if ( era_ > otherJvm.getEra() )
195 return 1;
196 else if ( era_ < otherJvm.getEra() )
197 return -1;
198
199 //major
200 if ( major_ > otherJvm.getMajor() )
201 return 1;
202 else if ( major_ < otherJvm.getMajor() )
203 return -1;
204
205 //minor
206 if ( minor_ > otherJvm.getMinor() )
207 return 1;
208 else if ( minor_ < otherJvm.getMinor() )
209 return -1;
210
211 //update
212 if ( update_ > otherJvm.getUpdate() )
213 return 1;
214 else if ( update_ < otherJvm.getUpdate() )
215 return -1;
216
217 //all the same so far, must be exactly the same
218 return 0;
219
220}
221
222int Jvm::getEra() { return era_; }
223int Jvm::getMajor() { return major_; }
224int Jvm::getMinor() { return minor_; }
225int Jvm::getUpdate() { return update_; }
226
227bool Jvm::getIsJdk() { return isJdk_; }
228bool Jvm::getIsJre() { return !isJdk_; }
229
230void Jvm::setVersionFromExeOuput() {
231 string command = "", output = "";
232 command.append( "\"" );
233 command.append( getExecutable() );
234 command.append( "\"" );
235 command.append(" -version");
236
237 //cerr << "command: " << command << endl;
238 int result = process_and_catch_output( command, output );
239 //cerr << "output: " << output << endl;
240
241 if ( result == 0 ) {
242 if ( strcmp( output.substr( 0, 12 ).c_str() , "java version" ) == 0 || true ) {
243 era_ = atoi( output.substr(14,1).c_str() );
244 major_ = atoi( output.substr(16,1).c_str() );
245 minor_ = atoi( output.substr(18,1).c_str() );
246 update_ = atoi( output.substr(20,2).c_str() );
247 } else {
248 healthy_=false;
249 }
250 } else {
251 healthy_ = false;
252 }
253}
254void Jvm::setIsJdkFromJavacPresence() {
255 string javacFile = "";
256 javacFile.append( javaHome_ );
257
258 #ifdef WINDOWS
259 javacFile.append( "\\bin\\javac.exe" );
260 #endif
261 #ifndef WINDOWS
262 javacFile.append( "/bin/javac" );
263 #endif
264 struct stat stFileInfo;
265 isJdk_ = ( stat(javacFile.c_str(),&stFileInfo) == 0 );
266}
267
268//end of Jvm class methods
269
270
271#ifdef WINDOWS
272int regSearch(HKEY hKey, const char* keyName, int searchType, char* foundJavaVer ) {
273 DWORD x = 0;
274 unsigned long size = 1024;
275 FILETIME time;
276 char buffer[1024] = {0};
277
278 int foundJava = NO_JAVA_FOUND;
279
280 while (RegEnumKeyEx(
281 hKey, // handle to key to enumerate
282 x++, // index of subkey to enumerate
283 buffer, // address of buffer for subkey name
284 &size, // address for size of subkey buffer
285 NULL, // reserved
286 NULL, // address of buffer for class string
287 NULL, // address for size of class buffer
288 &time) == ERROR_SUCCESS) {
289 strcpy(foundJavaVer, buffer);
290 foundJava = searchType;
291 size = 1024;
292 }
293
294 return foundJava;
295
296}
297#endif
298
299/*
300* function to find java
301* implements the logic drawn on the dl lab whiteboard in feb 08
302* return a Jvm object which represents the jvm on disk
303*/
304bool find( Jvm &jvm, bool use_minimum, const Jvm& minimum, bool jreOnly, bool jdkOnly, string phint, string hint, bool verbose ) {
305
306 if ( verbose ) cout << "Searching for a JVM" << endl;
307
308 char *javaHomeEnv = "";
309 bool jvmFound = false;
310
311 if ( !jvmFound ) {
312
313 //try the priority hint
314 if ( verbose ) cout << " - trying priority hint: ";
315 if ( strcmp(phint.c_str(),"") != 0 ) {
316 if ( verbose ) cout << "(" << phint << ") ";
317 jvm.setJavaHome( phint );
318 if ( jvm.check() ) {
319 if ( use_minimum ) {
320 if ( jvm.compare( minimum ) >= 0 ) {
321 jvmFound = true;
322 }
323 } else {
324 jvmFound = true;
325 }
326 }
327 if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
328 jvmFound = false;
329 }
330
331 }
332 if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
333 }
334
335 if ( !jvmFound ) {
336
337 //try JAVA_HOME
338 if ( verbose ) cout << " - trying JAVA_HOME: ";
339 javaHomeEnv = getenv( "JAVA_HOME" );
340 if ( javaHomeEnv != NULL ) {
341 if ( verbose ) cout << "(" << javaHomeEnv << ") ";
342 jvm.setJavaHome( javaHomeEnv );
343 if ( jvm.check() ) {
344 if ( use_minimum ) {
345 if ( jvm.compare( minimum ) >= 0 ) {
346 jvmFound = true;
347 }
348 } else {
349 jvmFound = true;
350 }
351 }
352 if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
353 jvmFound = false;
354 }
355
356 }
357 if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
358 }
359
360 if ( !jvmFound ) {
361
362 //try JRE_HOME
363 if ( verbose ) cout << " - trying JRE_HOME: ";
364 javaHomeEnv = getenv( "JRE_HOME" );
365 if ( javaHomeEnv != NULL ) {
366 if ( verbose ) cout << "(" << javaHomeEnv << ") ";
367 jvm.setJavaHome( javaHomeEnv );
368 if ( jvm.check() ) {
369 if ( use_minimum ) {
370 if ( jvm.compare( minimum ) >= 0 ) {
371 jvmFound = true;
372 }
373 } else {
374 jvmFound = true;
375 }
376 }
377 if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
378 jvmFound = false;
379 }
380
381 }
382 if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
383 }
384
385 #ifdef WINDOWS
386 if ( !jvmFound ) {
387
388 //try the registry - this code based on launch4j code
389 char foundJavaVer[8192] = {0};
390 int foundJava = NO_JAVA_FOUND;
391
392 if ( verbose ) cout << " - trying the registry: "; cout.flush();
393 HKEY hKey;
394 const char jre[] = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
395 const char sdk[] = "SOFTWARE\\JavaSoft\\Java Development Kit";
396
397 if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(jre), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
398 foundJava = regSearch(hKey, jre, FOUND_JRE, foundJavaVer);
399 RegCloseKey(hKey);
400 }
401
402 if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(sdk), 0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hKey) == ERROR_SUCCESS ) {
403 foundJava = regSearch(hKey, sdk, FOUND_SDK, foundJavaVer);
404 RegCloseKey(hKey);
405 }
406
407 if ( foundJava != NO_JAVA_FOUND ) {
408 char path[1024] = {0};
409 char keyBuffer[1024];
410 unsigned long datatype;
411 unsigned long bufferlength = 1024;
412 if (foundJava == FOUND_JRE) {
413 strcpy(keyBuffer, jre);
414 } else {
415 strcpy(keyBuffer, sdk);
416 }
417
418 strcat(keyBuffer, "\\");
419 strcat(keyBuffer, foundJavaVer);
420
421 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(keyBuffer), 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
422 unsigned char buffer[1024] = {0};
423 if (RegQueryValueEx(hKey, "JavaHome", NULL, &datatype, buffer, &bufferlength) == ERROR_SUCCESS) {
424 int i = 0;
425 do {
426 path[i] = buffer[i];
427 } while (path[i++] != 0);
428 if (foundJava == FOUND_SDK) {
429 strcat(path, "\\jre");
430 }
431 if ( verbose ) cerr << "path: " << path << endl ;
432 jvm.setJavaHome( path );
433 if ( jvm.check() ) {
434 if ( use_minimum ) {
435 if ( jvm.compare( minimum ) >= 0 ) {
436 jvmFound = true;
437 }
438 } else {
439 jvmFound = true;
440 }
441 }
442 if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
443 jvmFound = false;
444 }
445 }
446 RegCloseKey(hKey);
447 }
448 }
449 if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
450 }
451 #endif
452
453 if ( !jvmFound ) {
454
455 //try the hint
456 if ( verbose ) cout << " - trying hint: ";
457 if ( strcmp(hint.c_str(),"") != 0 ) {
458 if ( verbose ) cout << "(" << hint << ") ";
459 jvm.setJavaHome( hint );
460 if ( jvm.check() ) {
461 if ( use_minimum ) {
462 if ( jvm.compare( minimum ) >= 0 ) {
463 jvmFound = true;
464 }
465 } else {
466 jvmFound = true;
467 }
468 }
469 if ( (jreOnly && !jvm.getIsJre() ) || (jdkOnly && !jvm.getIsJdk()) ) {
470 jvmFound = false;
471 }
472
473 }
474 if ( verbose ) { if( jvmFound ) cout << "yes" << endl; else cout << "no" << endl; }
475 }
476
477
478 return jvmFound;
479}
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