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// natPosixProcess.cc - Native side of POSIX process code.
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <cni.h>
#include <jvm.h>
#include <java/lang/ConcreteProcess.h>
#include <java/lang/IllegalThreadStateException.h>
#include <java/lang/InterruptedException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/Thread.h>
#include <java/io/FileDescriptor.h>
#include <java/io/FileInputStream.h>
#include <java/io/FileOutputStream.h>
#include <java/io/IOException.h>
extern char **environ;
void
java::lang::ConcreteProcess::destroy (void)
{
if (! hasExited)
{
// Really kill it.
kill ((pid_t) pid, SIGKILL);
}
}
jint
java::lang::ConcreteProcess::exitValue (void)
{
if (! hasExited)
{
int wstat;
pid_t r = waitpid ((pid_t) pid, &wstat, WNOHANG);
if (r == -1)
{
jstring x = JvNewStringLatin1 (strerror (errno));
_Jv_Throw (new IllegalThreadStateException (x));
}
hasExited = true;
// Just use the raw status. FIXME: what is right?
status = wstat;
}
return status;
}
jint
java::lang::ConcreteProcess::waitFor (void)
{
if (! hasExited)
{
int wstat;
int r = waitpid ((pid_t) pid, &wstat, 0);
if (r != -1)
{
hasExited = true;
// Just use the raw status. FIXME: what is right?
status = wstat;
}
if (java::lang::Thread::interrupted())
_Jv_Throw (new InterruptedException (JvNewStringLatin1 ("wait interrupted")));
}
return status;
}
static char *
new_string (jstring string)
{
jsize s = _Jv_GetStringUTFLength (string);
char *buf = (char *) _Jv_Malloc (s + 1);
_Jv_GetStringUTFRegion (string, 0, s, buf);
buf[s] = '\0';
return buf;
}
void
java::lang::ConcreteProcess::startProcess (jstringArray progarray,
jstringArray envp)
{
using namespace java::io;
hasExited = false;
if (! progarray)
_Jv_Throw (new NullPointerException);
// Transform arrays to native form.
// FIXME: we use malloc here. We shouldn't. If an exception is
// thrown we will leak memory.
char **args = (char **) _Jv_Malloc ((progarray->length + 1)
* sizeof (char *));
char **env = NULL;
if (envp)
env = (char **) _Jv_Malloc ((envp->length + 1) * sizeof (char *));
// for (int i = 0; i < progarray->length; ++i)
// args[i] = NULL;
// for (int i = 0; i < envp->length; ++i)
// env[i] = NULL;
// FIXME: GC will fail here if _Jv_Malloc throws an exception.
// That's because we have to manually free the contents, but we
jstring *elts = elements (progarray);
for (int i = 0; i < progarray->length; ++i)
args[i] = new_string (elts[i]);
args[progarray->length] = NULL;
if (envp)
{
elts = elements (envp);
for (int i = 0; i < envp->length; ++i)
args[i] = new_string (elts[i]);
args[envp->length] = NULL;
}
// Create pipes for I/O.
int inp[2], outp[2], errp[2];
if (pipe (inp)
|| pipe (outp)
|| pipe (errp))
{
ioerror:
// FIXME.
_Jv_Free (args);
if (env)
_Jv_Free (env);
_Jv_Throw (new IOException (JvNewStringLatin1 (strerror (errno))));
}
// We create the streams before forking. Otherwise if we had an
// error while creating the streams we would have run the child with
// no way to communicate with it.
errorStream = new FileInputStream (new FileDescriptor (errp[0]));
inputStream = new FileInputStream (new FileDescriptor (inp[0]));
outputStream = new FileOutputStream (new FileDescriptor (outp[1]));
// We don't use vfork() because that would cause the local
// environment to be set by the child.
if ((pid = (jlong) fork ()) == -1)
goto ioerror;
if (pid == 0)
{
// Child process, so remap descriptors and exec.
if (envp)
environ = env;
// We ignore errors from dup2 because they should never occur.
dup2 (outp[0], 0);
dup2 (inp[1], 1);
dup2 (errp[1], 2);
close (inp[0]);
close (inp[1]);
close (errp[0]);
close (errp[1]);
close (outp[0]);
close (outp[1]);
environ = env;
execvp (args[0], args);
_exit (127);
}
// Parent. Close extra file descriptors and mark ours as
// close-on-exec.
close (outp[0]);
close (inp[1]);
close (errp[1]);
fcntl (outp[1], F_SETFD, 1);
fcntl (inp[0], F_SETFD, 1);
fcntl (errp[0], F_SETFD, 1);
}
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