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/*
* tinc app, an Android binding and user interface for the tinc mesh VPN daemon
* Copyright (C) 2018 Pacien TRAN-GIRARD
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <jni.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.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;
}
}
JNIEXPORT jint JNICALL
Java_org_pacien_tincapp_commands_Executor_wait(JNIEnv *env, jclass class, jint pid) {
int status;
waitpid(pid, &status, 0);
return WIFEXITED(status) ? WEXITSTATUS(status) : -1;
}
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