aboutsummaryrefslogtreecommitdiffstats
path: root/find_java/src/source/find_java_exe.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'find_java/src/source/find_java_exe.cpp')
-rw-r--r--find_java/src/source/find_java_exe.cpp155
1 files changed, 155 insertions, 0 deletions
diff --git a/find_java/src/source/find_java_exe.cpp b/find_java/src/source/find_java_exe.cpp
new file mode 100644
index 0000000..6b1add9
--- /dev/null
+++ b/find_java/src/source/find_java_exe.cpp
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * "find_java.exe", for Windows only.
+ * Tries to find a Java binary in a variety of places and prints the
+ * first one found on STDOUT and returns 0.
+ *
+ * If not found, returns error 1 with no message
+ * (unless ANDROID_SDKMAN_DEBUG or -d if set, in which case there's a message on STDERR).
+ *
+ * Implementation details:
+ * - We don't have access to ATL or MFC.
+ * - We don't want to pull in things like STL.
+ * - No Unicode/MBCS support for now.
+ *
+ * TODO for later version:
+ * - provide an env variable to let users override which version is being used.
+ * - if there's more than one java.exe found, enumerate them all.
+ * - and in that case take the one with the highest Java version number.
+ * - since that operation is expensive, do it only once and cache the result
+ * in a temp file. If the temp file is not found or the java binary no
+ * longer exists, re-run the enumaration.
+ */
+
+#ifdef _WIN32
+
+#include "utils.h"
+#include "find_java.h"
+#include <io.h>
+#include <fcntl.h>
+
+static void testFindJava() {
+
+ CPath javaPath("<not found>");
+ int v = findJavaInEnvPath(&javaPath);
+ printf("findJavaInEnvPath: [%d] %s\n", v, javaPath.cstr());
+
+ javaPath.set("<not found>");
+ v = findJavaInRegistry(&javaPath);
+ printf("findJavaInRegistry [%d] %s\n", v, javaPath.cstr());
+
+ javaPath.set("<not found>");
+ v = findJavaInProgramFiles(&javaPath);
+ printf("findJavaInProgramFiles [%d] %s\n", v, javaPath.cstr());
+}
+
+
+int main(int argc, char* argv[]) {
+
+ gIsConsole = true; // tell utils to to print errors to stderr
+ gIsDebug = (getenv("ANDROID_SDKMAN_DEBUG") != NULL);
+ bool doShortPath = false;
+ bool doVersion = false;
+ bool doJavaW = false;
+
+ for (int i = 1; i < argc; i++) {
+ if (strncmp(argv[i], "-t", 2) == 0) {
+ testFindJava();
+ return 0;
+
+ } else if (strncmp(argv[i], "-d", 2) == 0) {
+ gIsDebug = true;
+
+ } else if (strncmp(argv[i], "-s", 2) == 0) {
+ doShortPath = true;
+
+ } else if (strncmp(argv[i], "-v", 2) == 0) {
+ doVersion = true;
+
+ } else if (strcmp(argv[i], "-w") == 0 || strcmp(argv[i], "-javaw") == 0) {
+ doJavaW = true;
+
+ } else {
+ printf(
+ "Outputs the path of the first Java.exe found on the local system.\n"
+ "Returns code 0 when found, 1 when not found.\n"
+ "Options:\n"
+ "-h / -help : This help.\n"
+ "-t / -test : Internal test.\n"
+ "-s / -short : Print path in short DOS form.\n"
+ "-w / -javaw : Search a matching javaw.exe; defaults to java.exe if not found.\n"
+ "-v / -version: Only prints the Java version found.\n"
+ );
+ return 2;
+ }
+ }
+
+ // Find the first suitable version of Java we can use.
+ CPath javaPath;
+ int version = findJavaInEnvPath(&javaPath);
+ if (version < MIN_JAVA_VERSION) {
+ version = findJavaInRegistry(&javaPath);
+ }
+ if (version < MIN_JAVA_VERSION) {
+ version = findJavaInProgramFiles(&javaPath);
+ }
+ if (version < MIN_JAVA_VERSION || javaPath.isEmpty()) {
+ if (gIsDebug) {
+ fprintf(stderr, "Failed to find Java on your system.\n");
+ }
+ return 1;
+ }
+ _ASSERT(!javaPath.isEmpty());
+
+ if (doShortPath) {
+ PVOID oldWow64Value = disableWow64FsRedirection();
+ if (!javaPath.toShortPath(&javaPath)) {
+ revertWow64FsRedirection(&oldWow64Value);
+ fprintf(stderr,
+ "Failed to convert path to a short DOS path: %s\n",
+ javaPath.cstr());
+ return 1;
+ }
+ revertWow64FsRedirection(&oldWow64Value);
+ }
+
+ if (doVersion) {
+ // Print version found. We already have the version as an integer
+ // so we don't need to run java -version a second time.
+ printf("%d.%d", version / 1000, version % 1000);
+ return 0;
+ }
+
+ if (doJavaW) {
+ // Try to find a javaw.exe instead of java.exe at the same location.
+ CPath javawPath(javaPath);
+ javawPath.replaceName("java.exe", "javaw.exe");
+ // Only accept it if we can actually find the exec
+ PVOID oldWow64Value = disableWow64FsRedirection();
+ if (javawPath.fileExists()) {
+ javaPath.set(javawPath.cstr());
+ }
+ revertWow64FsRedirection(&oldWow64Value);
+ }
+
+ // Print java.exe path found
+ printf("%s", javaPath.cstr());
+ return 0;
+}
+
+#endif /* _WIN32 */