public List<String> buildARGV(MicroC posix) {
List<String> argv;
String os = System.getProperty("os.name");
if (this.programArgs != null) {
// if we had args passed to us, don't mess around, just use them
argv = new JvmBasedArgvFinder(this.programArgs).getArgv();
} else if ("Linux".equals(os)) {
argv = new LinuxArgvFinder(posix.getpid()).getArgv();
}
// else if ("Mac OS X".equals(os)) {
// argv = new MacARGVFinder().getArgv();
// if (!argv.get(0).endsWith("java")) {
// this works sometimes, not others, needs debugging. For now this heuristic
// seems to work
// argv = new JvmBasedArgvFinder(this.programArgs).getArgv();
// }
// }
else {
argv = new JvmBasedArgvFinder(this.programArgs).getArgv();
}
if (this.extraVmArgs.size() > 0) {
List<String> new_argv = new ArrayList<String>(argv.size() + extraVmArgs.size());
new_argv.add(argv.get(0));
new_argv.addAll(extraVmArgs);
new_argv.addAll(argv.subList(1, argv.size()));
argv = new_argv;
}
if (this.extraProgramArgs.size() > 0) {
argv.addAll(extraProgramArgs);
}
return argv;
}
public Status forkish() throws IOException {
if (isDaemon()) {
posix.setsid();
OutputStream old_out = System.out;
OutputStream old_err = System.err;
System.setOut(new PrintStream(new FileOutputStream(out, true)));
System.setErr(new PrintStream(new FileOutputStream(err, true)));
old_err.close();
old_out.close();
if (pidfile != null) {
FileOutputStream p_out = new FileOutputStream(pidfile);
p_out.write(String.valueOf(posix.getpid()).getBytes());
p_out.close();
}
return Status.child(posix.getpid());
} else {
String[] envp = getEnv(Daemon.class.getName() + "=daemon");
List<String> argv = buildARGV(posix);
jnr.ffi.Runtime runtime = jnr.ffi.Runtime.getSystemRuntime();
Pointer NULL = Pointer.wrap(runtime, 0L);
IntByReference child_pid = new IntByReference();
int rs =
posix.posix_spawnp(
child_pid, argv.get(0), NULL, NULL, argv.toArray(new String[argv.size()]), envp);
if (rs != 0) {
throw new RuntimeException(posix.strerror(rs));
}
return Status.parent(child_pid.getValue());
}
}