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 Module PosixPlatform::LoadLibrary(TString FileName) {
98 return dlopen(StringToFileSystemString(FileName), RTLD_LAZY);
99 }
100
101 void PosixPlatform::FreeLibrary(Module AModule) {
102 dlclose(AModule);
103 }
104
105 Procedure PosixPlatform::GetProcAddress(Module AModule,
106 std::string MethodName) {
107 return dlsym(AModule, PlatformString(MethodName));
108 }
109
110 Process* PosixPlatform::CreateProcess() {
111 return new PosixProcess();
112 }
113
114 void PosixPlatform::addPlatformDependencies(JavaLibrary *pJavaLibrary) {
115 }
116
117 void Platform::CopyString(char *Destination,
118 size_t NumberOfElements, const char *Source) {
119 strncpy(Destination, Source, NumberOfElements);
120
121 if (NumberOfElements > 0) {
122 Destination[NumberOfElements - 1] = '\0';
123 }
124 }
125
126 void Platform::CopyString(wchar_t *Destination,
127 size_t NumberOfElements, const wchar_t *Source) {
128 wcsncpy(Destination, Source, NumberOfElements);
129
130 if (NumberOfElements > 0) {
131 Destination[NumberOfElements - 1] = '\0';
132 }
133 }
134
135 // Owner must free the return value.
136
137 MultibyteString Platform::WideStringToMultibyteString(
138 const wchar_t* value) {
139 MultibyteString result;
140 size_t count = 0;
141
142 if (value == NULL) {
143 return result;
144 }
145
146 count = wcstombs(NULL, value, 0);
147 if (count > 0) {
148 result.data = new char[count + 1];
149 result.data[count] = '\0';
150 result.length = count;
151 wcstombs(result.data, value, count);
152 }
153
154 return result;
155 }
156
157 // Owner must free the return value.
158
159 WideString Platform::MultibyteStringToWideString(const char* value) {
160 WideString result;
161 size_t count = 0;
162
163 if (value == NULL) {
164 return result;
165 }
166
167 count = mbstowcs(NULL, value, 0);
168 if (count > 0) {
169 result.data = new wchar_t[count + 1];
170 result.data[count] = '\0';
171 result.length = count;
172 mbstowcs(result.data, value, count);
173 }
174
175 return result;
176 }
177
178 void PosixPlatform::InitStreamLocale(wios *stream) {
179 // Nothing to do for POSIX platforms.
180 }
181
182 PosixProcess::PosixProcess() : Process() {
183 FChildPID = 0;
184 FRunning = false;
185 FOutputHandle = 0;
186 FInputHandle = 0;
187 }
188
189 PosixProcess::~PosixProcess() {
190 Terminate();
191 }
192
193 bool PosixProcess::ReadOutput() {
194 bool result = false;
195
196 if (FOutputHandle != 0 && IsRunning() == true) {
197 char buffer[4096] = {0};
198
199 ssize_t count = read(FOutputHandle, buffer, sizeof (buffer));
200
201 if (count == -1) {
202 if (errno == EINTR) {
203 // continue;
204 } else {
205 perror("read");
206 exit(1);
207 }
208 } else if (count == 0) {
209 // break;
210 } else {
211 std::list<TString> output = Helpers::StringToArray(buffer);
212 FOutput.splice(FOutput.end(), output, output.begin(), output.end());
213 result = true;
214 }
215 }
216
217 return false;
218 }
219
220 bool PosixProcess::IsRunning() {
221 bool result = false;
222
223 if (kill(FChildPID, 0) == 0) {
224 result = true;
225 }
226
227 return result;
228 }
229
230 bool PosixProcess::Terminate() {
231 bool result = false;
232
233 if (IsRunning() == true && FRunning == true) {
234 FRunning = false;
235 Cleanup();
236 int status = kill(FChildPID, SIGTERM);
237
238 if (status == 0) {
239 result = true;
240 } else {
241 #ifdef DEBUG
242 if (errno == EINVAL) {
243 printf("Kill error: The value of the sig argument is an invalid or unsupported signal number.");
244 } else if (errno == EPERM) {
245 printf("Kill error: The process does not have permission to send the signal to any receiving process.");
246 } else if (errno == ESRCH) {
247 printf("Kill error: No process or process group can be found corresponding to that specified by pid.");
248 }
249 #endif // DEBUG
250 if (IsRunning() == true) {
251 status = kill(FChildPID, SIGKILL);
252
253 if (status == 0) {
254 result = true;
255 }
256 }
257 }
258 }
259
260 return result;
261 }
262
263 bool PosixProcess::Wait() {
264 bool result = false;
265
266 int status = 0;
267 pid_t wpid = 0;
268
269 wpid = wait(&status);
270 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
271 if (errno != EINTR) {
272 status = -1;
273 }
274 }
275
276 #ifdef DEBUG
277 if (WIFEXITED(status)) {
278 printf("child exited, status=%d\n", WEXITSTATUS(status));
279 } else if (WIFSIGNALED(status)) {
280 printf("child killed (signal %d)\n", WTERMSIG(status));
281 } else if (WIFSTOPPED(status)) {
282 printf("child stopped (signal %d)\n", WSTOPSIG(status));
283 #ifdef WIFCONTINUED // Not all implementations support this
284 } else if (WIFCONTINUED(status)) {
285 printf("child continued\n");
286 #endif // WIFCONTINUED
287 } else { // Non-standard case -- may never happen
288 printf("Unexpected status (0x%x)\n", status);
289 }
290 #endif // DEBUG
291
292 if (wpid != -1) {
293 result = true;
294 }
295
296 return result;
297 }
298
299 TProcessID PosixProcess::GetProcessID() {
300 return FChildPID;
301 }
302
303 void PosixProcess::SetInput(TString Value) {
304 if (FInputHandle != 0) {
305 if (write(FInputHandle, Value.data(), Value.size()) < 0) {
306 throw Exception(_T("Internal Error - write failed"));
307 }
308 }
309 }
310
311 std::list<TString> PosixProcess::GetOutput() {
312 ReadOutput();
313 return Process::GetOutput();
314 }