Added Process.getWorkingDirectory() and setWorkingDirectory() and posix implementation.

readme.md

@@ -15,6 +15,7 @@ These APIs support Java 5 and later. Some of these APIs overlap with APIs availa
 ### Processes
 
 * Get the PID of the current process.
+* Get and set the process working directory.
 
 ### Terminal and console
 

src/main/cpp/posix.cpp

@@ -144,6 +144,30 @@ Java_net_rubygrapefruit_platform_internal_jni_PosixProcessFunctions_getPid(JNIEn
     return getpid();
 }
 
+JNIEXPORT jstring JNICALL
+Java_net_rubygrapefruit_platform_internal_jni_PosixProcessFunctions_getWorkingDirectory(JNIEnv *env, jclass target, jobject result) {
+    char* path = getcwd(NULL, 0);
+    if (path == NULL) {
+        mark_failed_with_errno(env, "could not getcwd()", result);
+        return NULL;
+    }
+    jstring dir = char_to_java(env, path, result);
+    free(path);
+    return dir;
+}
+
+JNIEXPORT void JNICALL
+Java_net_rubygrapefruit_platform_internal_jni_PosixProcessFunctions_setWorkingDirectory(JNIEnv *env, jclass target, jstring dir, jobject result) {
+    char* path = java_to_char(env, dir, result);
+    if (path == NULL) {
+        return;
+    }
+    if (chdir(path) != 0) {
+        mark_failed_with_errno(env, "could not setcwd()", result);
+    }
+    free(path);
+}
+
 /*
  * Terminal functions
  */

src/main/headers/generic.h

@@ -23,7 +23,7 @@
 extern "C" {
 #endif
 
-#define NATIVE_VERSION 11
+#define NATIVE_VERSION 12
 
 /*
  * Marks the given result as failed, using the given error message

src/main/java/net/rubygrapefruit/platform/Native.java

@@ -55,7 +55,7 @@ public class Native {
                     loader.load(platform.getLibraryName());
                     int nativeVersion = NativeLibraryFunctions.getVersion();
                     if (nativeVersion != NativeLibraryFunctions.VERSION) {
-                        throw new NativeException(String.format("Unexpected native library version loaded. Expected %s, was %s.", nativeVersion, NativeLibraryFunctions.VERSION));
+                        throw new NativeException(String.format("Unexpected native library version loaded. Expected %s, was %s.", NativeLibraryFunctions.VERSION, nativeVersion));
                     }
                 } catch (NativeException e) {
                     throw e;

src/main/java/net/rubygrapefruit/platform/Process.java

@@ -16,6 +16,8 @@
 
 package net.rubygrapefruit.platform;
 
+import java.io.File;
+
 /**
  * Functions to query and modify a process' state.
  */
@@ -28,4 +30,20 @@ public interface Process extends NativeIntegration {
      */
     @ThreadSafe
     int getProcessId() throws NativeException;
+
+    /**
+     * Returns the process' current working directory.
+     *
+     * @throws NativeException On failure.
+     */
+    @ThreadSafe
+    File getWorkingDirectory() throws NativeException;
+
+    /**
+     * Sets the process' working directory.
+     *
+     * @throws NativeException On failure.
+     */
+    @ThreadSafe
+    void setWorkingDirectory(File directory) throws NativeException;
 }

src/main/java/net/rubygrapefruit/platform/internal/DefaultProcess.java

@@ -19,8 +19,28 @@ package net.rubygrapefruit.platform.internal;
 import net.rubygrapefruit.platform.*;
 import net.rubygrapefruit.platform.internal.jni.PosixProcessFunctions;
 
+import java.io.File;
+
 public class DefaultProcess implements net.rubygrapefruit.platform.Process {
     public int getProcessId() throws NativeException {
         return PosixProcessFunctions.getPid();
     }
+
+    public File getWorkingDirectory() throws NativeException {
+        FunctionResult result = new FunctionResult();
+        String dir = PosixProcessFunctions.getWorkingDirectory(result);
+        if (result.isFailed()) {
+            throw new NativeException(String.format("Could not get process working directory: %s", result.getMessage()));
+        }
+        return new File(dir);
+    }
+
+    public void setWorkingDirectory(File directory) throws NativeException {
+        FunctionResult result = new FunctionResult();
+        PosixProcessFunctions.setWorkingDirectory(directory.getAbsolutePath(), result);
+        if (result.isFailed()) {
+            throw new NativeException(String.format("Could not set process working directory: %s", result.getMessage()));
+        }
+        System.setProperty("user.dir", directory.getAbsolutePath());
+    }
 }

src/main/java/net/rubygrapefruit/platform/internal/jni/NativeLibraryFunctions.java

@@ -20,7 +20,7 @@ import net.rubygrapefruit.platform.internal.FunctionResult;
 import net.rubygrapefruit.platform.internal.MutableSystemInfo;
 
 public class NativeLibraryFunctions {
-    public static final int VERSION = 11;
+    public static final int VERSION = 12;
 
     public static native int getVersion();
 

src/main/java/net/rubygrapefruit/platform/internal/jni/PosixProcessFunctions.java

@@ -1,21 +1,27 @@
-/*
- * Copyright 2012 Adam Murdoch
- *
- *    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.
- */
-
-package net.rubygrapefruit.platform.internal.jni;
-
-public class PosixProcessFunctions {
-    public static native int getPid();
-}
+/*
+ * Copyright 2012 Adam Murdoch
+ *
+ *    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.
+ */
+
+package net.rubygrapefruit.platform.internal.jni;
+
+import net.rubygrapefruit.platform.internal.FunctionResult;
+
+public class PosixProcessFunctions {
+    public static native int getPid();
+
+    public static native String getWorkingDirectory(FunctionResult result);
+
+    public static native void setWorkingDirectory(String dir, FunctionResult result);
+}

src/test/groovy/net/rubygrapefruit/platform/ProcessTest.groovy

@@ -1,36 +1,58 @@
-/*
- * Copyright 2012 Adam Murdoch
- *
- *    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.
- */
-
-package net.rubygrapefruit.platform
-
-import org.junit.Rule
-import org.junit.rules.TemporaryFolder
-import spock.lang.Specification
-
-class ProcessTest extends Specification {
-    @Rule TemporaryFolder tmpDir
-    final Process process = Native.get(Process.class)
-
-    def "caches process instance"() {
-        expect:
-        Native.get(Process.class) == process
-    }
-
-    def "can get PID"() {
-        expect:
-        process.getProcessId() != 0
-    }
-}
+/*
+ * Copyright 2012 Adam Murdoch
+ *
+ *    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.
+ */
+
+package net.rubygrapefruit.platform
+
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import spock.lang.Specification
+
+class ProcessTest extends Specification {
+    @Rule TemporaryFolder tmpDir
+    final Process process = Native.get(Process.class)
+
+    def "caches process instance"() {
+        expect:
+        Native.get(Process.class) == process
+    }
+
+    def "can get PID"() {
+        expect:
+        process.getProcessId() != 0
+    }
+
+    def "can change working directory"() {
+        def newDir = tmpDir.newFolder("dir").canonicalFile
+
+        when:
+        def original = process.workingDirectory
+
+        then:
+        original == new File(".").canonicalFile
+        original == new File(System.getProperty("user.dir"))
+
+        when:
+        process.workingDirectory = newDir
+
+        then:
+        process.workingDirectory == newDir
+        new File(".").canonicalFile == newDir
+        new File(System.getProperty("user.dir")) == newDir
+
+        cleanup:
+        process.workingDirectory = original
+    }
+}