1 /*
2 * Copyright (c) 2014, 2019, 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 "PosixPlatform.h"
27
28 #include "PlatformString.h"
29 #include "FilePath.h"
30 #include "Helpers.h"
31
32 #include <assert.h>
33 #include <stdbool.h>
34 #include <sys/types.h>
35 #include <unistd.h>
36 #include <sys/sysctl.h>
37 #include <sys/file.h>
38 #include <sys/stat.h>
39 #include <sys/wait.h>
40 #include <errno.h>
41 #include <limits.h>
42 #include <pwd.h>
43 #include <iostream>
44 #include <algorithm>
45 #include <dlfcn.h>
46 #include <signal.h>
47
48 using namespace std;
49
50 PosixPlatform::PosixPlatform(void) {
51 }
52
53 PosixPlatform::~PosixPlatform(void) {
54 }
55
56 TString PosixPlatform::GetTempDirectory() {
57 struct passwd* pw = getpwuid(getuid());
58 TString homedir(pw->pw_dir);
59 homedir += getTmpDirString();
60 if (!FilePath::DirectoryExists(homedir)) {
61 if (!FilePath::CreateDirectory(homedir, false)) {
62 homedir.clear();
63 }
64 }
65
66 return homedir;
67 }
68
69 TString PosixPlatform::fixName(const TString& name) {
70 TString fixedName(name);
71 const TString chars("?:*<>/\\");
72 for (TString::const_iterator it = chars.begin(); it != chars.end(); it++) {
73 fixedName.erase(std::remove(fixedName.begin(),
74 fixedName.end(), *it), fixedName.end());
75 }
76 return fixedName;
77 }
78
79 MessageResponse PosixPlatform::ShowResponseMessage(TString title,
80 TString description) {
81 MessageResponse result = mrCancel;
82
83 printf("%s %s (Y/N)\n", PlatformString(title).toPlatformString(),
84 PlatformString(description).toPlatformString());
85 fflush(stdout);
86
87 std::string input;
88 std::cin >> input;
89
90 if (input == "Y") {
91 result = mrOK;
92 }
93
94 return result;
95 }
96
97 void PosixPlatform::SetCurrentDirectory(TString Value) {
98 chdir(StringToFileSystemString(Value));
99 }
100
101 Module PosixPlatform::LoadLibrary(TString FileName) {
102 return dlopen(StringToFileSystemString(FileName), RTLD_LAZY);
103 }
104
105 void PosixPlatform::FreeLibrary(Module AModule) {
106 dlclose(AModule);
107 }
108
109 Procedure PosixPlatform::GetProcAddress(Module AModule,
110 std::string MethodName) {
111 return dlsym(AModule, PlatformString(MethodName));
112 }
113
114 Process* PosixPlatform::CreateProcess() {
115 return new PosixProcess();
116 }
117
118 void PosixPlatform::addPlatformDependencies(JavaLibrary *pJavaLibrary) {
119 }
120
121 void Platform::CopyString(char *Destination,
122 size_t NumberOfElements, const char *Source) {
123 strncpy(Destination, Source, NumberOfElements);
124
125 if (NumberOfElements > 0) {
126 Destination[NumberOfElements - 1] = '\0';
127 }
128 }
129
130 void Platform::CopyString(wchar_t *Destination,
131 size_t NumberOfElements, const wchar_t *Source) {
132 wcsncpy(Destination, Source, NumberOfElements);
133
134 if (NumberOfElements > 0) {
135 Destination[NumberOfElements - 1] = '\0';
136 }
137 }
138
139 // Owner must free the return value.
140
141 MultibyteString Platform::WideStringToMultibyteString(
142 const wchar_t* value) {
143 MultibyteString result;
144 size_t count = 0;
145
146 if (value == NULL) {
147 return result;
148 }
149
150 count = wcstombs(NULL, value, 0);
151 if (count > 0) {
152 result.data = new char[count + 1];
153 result.data[count] = '\0';
154 result.length = count;
155 wcstombs(result.data, value, count);
156 }
157
158 return result;
159 }
160
161 // Owner must free the return value.
162
163 WideString Platform::MultibyteStringToWideString(const char* value) {
164 WideString result;
165 size_t count = 0;
166
167 if (value == NULL) {
168 return result;
169 }
170
171 count = mbstowcs(NULL, value, 0);
172 if (count > 0) {
173 result.data = new wchar_t[count + 1];
174 result.data[count] = '\0';
175 result.length = count;
176 mbstowcs(result.data, value, count);
177 }
178
179 return result;
180 }
181
182 void PosixPlatform::InitStreamLocale(wios *stream) {
183 // Nothing to do for POSIX platforms.
184 }
185
186 PosixProcess::PosixProcess() : Process() {
187 FChildPID = 0;
188 FRunning = false;
189 FOutputHandle = 0;
190 FInputHandle = 0;
191 }
192
193 PosixProcess::~PosixProcess() {
194 Terminate();
195 }
196
197 bool PosixProcess::ReadOutput() {
198 bool result = false;
199
200 if (FOutputHandle != 0 && IsRunning() == true) {
201 char buffer[4096] = {0};
202
203 ssize_t count = read(FOutputHandle, buffer, sizeof (buffer));
204
205 if (count == -1) {
206 if (errno == EINTR) {
207 // continue;
208 } else {
209 perror("read");
210 exit(1);
211 }
212 } else if (count == 0) {
213 // break;
214 } else {
215 std::list<TString> output = Helpers::StringToArray(buffer);
216 FOutput.splice(FOutput.end(), output, output.begin(), output.end());
217 result = true;
218 }
219 }
220
221 return false;
222 }
223
224 bool PosixProcess::IsRunning() {
225 bool result = false;
226
227 if (kill(FChildPID, 0) == 0) {
228 result = true;
229 }
230
231 return result;
232 }
233
234 bool PosixProcess::Terminate() {
235 bool result = false;
236
237 if (IsRunning() == true && FRunning == true) {
238 FRunning = false;
239 Cleanup();
240 int status = kill(FChildPID, SIGTERM);
241
242 if (status == 0) {
243 result = true;
244 } else {
245 #ifdef DEBUG
246 if (errno == EINVAL) {
247 printf("Kill error: The value of the sig argument is an invalid or unsupported signal number.");
248 } else if (errno == EPERM) {
249 printf("Kill error: The process does not have permission to send the signal to any receiving process.");
250 } else if (errno == ESRCH) {
251 printf("Kill error: No process or process group can be found corresponding to that specified by pid.");
252 }
253 #endif // DEBUG
254 if (IsRunning() == true) {
255 status = kill(FChildPID, SIGKILL);
256
257 if (status == 0) {
258 result = true;
259 }
260 }
261 }
262 }
263
264 return result;
265 }
266
267 bool PosixProcess::Wait() {
268 bool result = false;
269
270 int status = 0;
271 pid_t wpid = 0;
272
273 wpid = wait(&status);
274 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
275 if (errno != EINTR) {
276 status = -1;
277 }
278 }
279
280 #ifdef DEBUG
281 if (WIFEXITED(status)) {
282 printf("child exited, status=%d\n", WEXITSTATUS(status));
283 } else if (WIFSIGNALED(status)) {
284 printf("child killed (signal %d)\n", WTERMSIG(status));
285 } else if (WIFSTOPPED(status)) {
286 printf("child stopped (signal %d)\n", WSTOPSIG(status));
287 #ifdef WIFCONTINUED // Not all implementations support this
288 } else if (WIFCONTINUED(status)) {
289 printf("child continued\n");
290 #endif // WIFCONTINUED
291 } else { // Non-standard case -- may never happen
292 printf("Unexpected status (0x%x)\n", status);
293 }
294 #endif // DEBUG
295
296 if (wpid != -1) {
297 result = true;
298 }
299
300 return result;
301 }
302
303 TProcessID PosixProcess::GetProcessID() {
304 return FChildPID;
305 }
306
307 void PosixProcess::SetInput(TString Value) {
308 if (FInputHandle != 0) {
309 write(FInputHandle, Value.data(), Value.size());
310 }
311 }
312
313 std::list<TString> PosixProcess::GetOutput() {
314 ReadOutput();
315 return Process::GetOutput();
316 }