1 files changed, 34 insertions, 0 deletions

diff --git a/app/src/main/c/exec.c b/app/src/main/c/exec.c
new file mode 100644
index 0000000..fdaec0f
--- /dev/null
+++ b/app/src/main/c/exec.c
@@ -0,0 +1,34 @@
+#include <jni.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+static inline const char **to_string_array(JNIEnv *env, jobjectArray ja) {
+        const int len = (*env)->GetArrayLength(env, ja);
+        const char **ca = calloc((size_t) len + 1, sizeof(char *));
+
+        for (int i = 0; i < len; ++i) {
+                jstring jstr = (jstring) (*env)->GetObjectArrayElement(env, ja, i);
+                ca[i] = (*env)->GetStringUTFChars(env, jstr, NULL);
+        }
+
+        ca[len] = NULL;
+        return ca;
+}
+
+static inline void exec(const char **argcv) {
+        execv(argcv[0], (char *const *) argcv);
+        exit(1);
+}
+
+JNIEXPORT jint JNICALL
+Java_org_pacien_tincapp_commands_Executor_forkExec(JNIEnv *env, jclass class, jobjectArray argcv) {
+        pid_t pid = fork();
+        switch (pid) {
+                case 0:
+                        exec(to_string_array(env, argcv));
+                        return 0;
+
+                default:
+                        return pid;
+        }
+}