--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/unix/native/libjava/ProcessImpl_md.c Mon Jan 26 10:55:27 2015 -0500
@@ -0,0 +1,724 @@
+/*
+ * Copyright (c) 1995, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#undef _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE 1
+
+#include "jni.h"
+#include "jvm.h"
+#include "jvm_md.h"
+#include "jni_util.h"
+#include "io_util.h"
+
+/*
+ * Platform-specific support for java.lang.Process
+ */
+#include <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <string.h>
+
+#if defined(__solaris__) || defined(_ALLBSD_SOURCE) || defined(_AIX)
+#include <spawn.h>
+#endif
+
+#include "childproc.h"
+
+/*
+ * There are 4 possible strategies we might use to "fork":
+ *
+ * - fork(2). Very portable and reliable but subject to
+ * failure due to overcommit (see the documentation on
+ * /proc/sys/vm/overcommit_memory in Linux proc(5)).
+ * This is the ancient problem of spurious failure whenever a large
+ * process starts a small subprocess.
+ *
+ * - vfork(). Using this is scary because all relevant man pages
+ * contain dire warnings, e.g. Linux vfork(2). But at least it's
+ * documented in the glibc docs and is standardized by XPG4.
+ * http://www.opengroup.org/onlinepubs/000095399/functions/vfork.html
+ * On Linux, one might think that vfork() would be implemented using
+ * the clone system call with flag CLONE_VFORK, but in fact vfork is
+ * a separate system call (which is a good sign, suggesting that
+ * vfork will continue to be supported at least on Linux).
+ * Another good sign is that glibc implements posix_spawn using
+ * vfork whenever possible. Note that we cannot use posix_spawn
+ * ourselves because there's no reliable way to close all inherited
+ * file descriptors.
+ *
+ * - clone() with flags CLONE_VM but not CLONE_THREAD. clone() is
+ * Linux-specific, but this ought to work - at least the glibc
+ * sources contain code to handle different combinations of CLONE_VM
+ * and CLONE_THREAD. However, when this was implemented, it
+ * appeared to fail on 32-bit i386 (but not 64-bit x86_64) Linux with
+ * the simple program
+ * Runtime.getRuntime().exec("/bin/true").waitFor();
+ * with:
+ * # Internal Error (os_linux_x86.cpp:683), pid=19940, tid=2934639536
+ * # Error: pthread_getattr_np failed with errno = 3 (ESRCH)
+ * We believe this is a glibc bug, reported here:
+ * http://sources.redhat.com/bugzilla/show_bug.cgi?id=10311
+ * but the glibc maintainers closed it as WONTFIX.
+ *
+ * - posix_spawn(). While posix_spawn() is a fairly elaborate and
+ * complicated system call, it can't quite do everything that the old
+ * fork()/exec() combination can do, so the only feasible way to do
+ * this, is to use posix_spawn to launch a new helper executable
+ * "jprochelper", which in turn execs the target (after cleaning
+ * up file-descriptors etc.) The end result is the same as before,
+ * a child process linked to the parent in the same way, but it
+ * avoids the problem of duplicating the parent (VM) process
+ * address space temporarily, before launching the target command.
+ *
+ * Based on the above analysis, we are currently using vfork() on
+ * Linux and spawn() on other Unix systems, but the code to use clone()
+ * and fork() remains.
+ */
+
+
+static void
+setSIGCHLDHandler(JNIEnv *env)
+{
+ /* There is a subtle difference between having the signal handler
+ * for SIGCHLD be SIG_DFL and SIG_IGN. We cannot obtain process
+ * termination information for child processes if the signal
+ * handler is SIG_IGN. It must be SIG_DFL.
+ *
+ * We used to set the SIGCHLD handler only on Linux, but it's
+ * safest to set it unconditionally.
+ *
+ * Consider what happens if java's parent process sets the SIGCHLD
+ * handler to SIG_IGN. Normally signal handlers are inherited by
+ * children, but SIGCHLD is a controversial case. Solaris appears
+ * to always reset it to SIG_DFL, but this behavior may be
+ * non-standard-compliant, and we shouldn't rely on it.
+ *
+ * References:
+ * http://www.opengroup.org/onlinepubs/7908799/xsh/exec.html
+ * http://www.pasc.org/interps/unofficial/db/p1003.1/pasc-1003.1-132.html
+ */
+ struct sigaction sa;
+ sa.sa_handler = SIG_DFL;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_NOCLDSTOP | SA_RESTART;
+ if (sigaction(SIGCHLD, &sa, NULL) < 0)
+ JNU_ThrowInternalError(env, "Can't set SIGCHLD handler");
+}
+
+static void*
+xmalloc(JNIEnv *env, size_t size)
+{
+ void *p = malloc(size);
+ if (p == NULL)
+ JNU_ThrowOutOfMemoryError(env, NULL);
+ return p;
+}
+
+#define NEW(type, n) ((type *) xmalloc(env, (n) * sizeof(type)))
+
+/**
+ * If PATH is not defined, the OS provides some default value.
+ * Unfortunately, there's no portable way to get this value.
+ * Fortunately, it's only needed if the child has PATH while we do not.
+ */
+static const char*
+defaultPath(void)
+{
+#ifdef __solaris__
+ /* These really are the Solaris defaults! */
+ return (geteuid() == 0 || getuid() == 0) ?
+ "/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:/opt/SUNWspro/bin:/usr/sbin" :
+ "/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:/opt/SUNWspro/bin:";
+#else
+ return ":/bin:/usr/bin"; /* glibc */
+#endif
+}
+
+static const char*
+effectivePath(void)
+{
+ const char *s = getenv("PATH");
+ return (s != NULL) ? s : defaultPath();
+}
+
+static int
+countOccurrences(const char *s, char c)
+{
+ int count;
+ for (count = 0; *s != '\0'; s++)
+ count += (*s == c);
+ return count;
+}
+
+static const char * const *
+effectivePathv(JNIEnv *env)
+{
+ char *p;
+ int i;
+ const char *path = effectivePath();
+ int count = countOccurrences(path, ':') + 1;
+ size_t pathvsize = sizeof(const char *) * (count+1);
+ size_t pathsize = strlen(path) + 1;
+ const char **pathv = (const char **) xmalloc(env, pathvsize + pathsize);
+
+ if (pathv == NULL)
+ return NULL;
+ p = (char *) pathv + pathvsize;
+ memcpy(p, path, pathsize);
+ /* split PATH by replacing ':' with NULs; empty components => "." */
+ for (i = 0; i < count; i++) {
+ char *q = p + strcspn(p, ":");
+ pathv[i] = (p == q) ? "." : p;
+ *q = '\0';
+ p = q + 1;
+ }
+ pathv[count] = NULL;
+ return pathv;
+}
+
+JNIEXPORT void JNICALL
+Java_java_lang_ProcessImpl_init(JNIEnv *env, jclass clazz)
+{
+ parentPathv = effectivePathv(env);
+ CHECK_NULL(parentPathv);
+ setSIGCHLDHandler(env);
+}
+
+
+#ifndef WIFEXITED
+#define WIFEXITED(status) (((status)&0xFF) == 0)
+#endif
+
+#ifndef WEXITSTATUS
+#define WEXITSTATUS(status) (((status)>>8)&0xFF)
+#endif
+
+#ifndef WIFSIGNALED
+#define WIFSIGNALED(status) (((status)&0xFF) > 0 && ((status)&0xFF00) == 0)
+#endif
+
+#ifndef WTERMSIG
+#define WTERMSIG(status) ((status)&0x7F)
+#endif
+
+/* Block until a child process exits and return its exit code.
+ Note, can only be called once for any given pid. */
+JNIEXPORT jint JNICALL
+Java_java_lang_ProcessImpl_waitForProcessExit(JNIEnv* env,
+ jobject junk,
+ jint pid)
+{
+ /* We used to use waitid() on Solaris, waitpid() on Linux, but
+ * waitpid() is more standard, so use it on all POSIX platforms. */
+ int status;
+ /* Wait for the child process to exit. This returns immediately if
+ the child has already exited. */
+ while (waitpid(pid, &status, 0) < 0) {
+ switch (errno) {
+ case ECHILD: return 0;
+ case EINTR: break;
+ default: return -1;
+ }
+ }
+
+ if (WIFEXITED(status)) {
+ /*
+ * The child exited normally; get its exit code.
+ */
+ return WEXITSTATUS(status);
+ } else if (WIFSIGNALED(status)) {
+ /* The child exited because of a signal.
+ * The best value to return is 0x80 + signal number,
+ * because that is what all Unix shells do, and because
+ * it allows callers to distinguish between process exit and
+ * process death by signal.
+ * Unfortunately, the historical behavior on Solaris is to return
+ * the signal number, and we preserve this for compatibility. */
+#ifdef __solaris__
+ return WTERMSIG(status);
+#else
+ return 0x80 + WTERMSIG(status);
+#endif
+ } else {
+ /*
+ * Unknown exit code; pass it through.
+ */
+ return status;
+ }
+}
+
+static const char *
+getBytes(JNIEnv *env, jbyteArray arr)
+{
+ return arr == NULL ? NULL :
+ (const char*) (*env)->GetByteArrayElements(env, arr, NULL);
+}
+
+static void
+releaseBytes(JNIEnv *env, jbyteArray arr, const char* parr)
+{
+ if (parr != NULL)
+ (*env)->ReleaseByteArrayElements(env, arr, (jbyte*) parr, JNI_ABORT);
+}
+
+static void
+throwIOException(JNIEnv *env, int errnum, const char *defaultDetail)
+{
+ static const char * const format = "error=%d, %s";
+ const char *detail = defaultDetail;
+ char *errmsg;
+ jstring s;
+
+ if (errnum != 0) {
+ const char *s = strerror(errnum);
+ if (strcmp(s, "Unknown error") != 0)
+ detail = s;
+ }
+ /* ASCII Decimal representation uses 2.4 times as many bits as binary. */
+ errmsg = NEW(char, strlen(format) + strlen(detail) + 3 * sizeof(errnum));
+ if (errmsg == NULL)
+ return;
+
+ sprintf(errmsg, format, errnum, detail);
+ s = JNU_NewStringPlatform(env, errmsg);
+ if (s != NULL) {
+ jobject x = JNU_NewObjectByName(env, "java/io/IOException",
+ "(Ljava/lang/String;)V", s);
+ if (x != NULL)
+ (*env)->Throw(env, x);
+ }
+ free(errmsg);
+}
+
+#ifdef DEBUG_PROCESS
+/* Debugging process code is difficult; where to write debug output? */
+static void
+debugPrint(char *format, ...)
+{
+ FILE *tty = fopen("/dev/tty", "w");
+ va_list ap;
+ va_start(ap, format);
+ vfprintf(tty, format, ap);
+ va_end(ap);
+ fclose(tty);
+}
+#endif /* DEBUG_PROCESS */
+
+static void
+copyPipe(int from[2], int to[2])
+{
+ to[0] = from[0];
+ to[1] = from[1];
+}
+
+/* arg is an array of pointers to 0 terminated strings. array is terminated
+ * by a null element.
+ *
+ * *nelems and *nbytes receive the number of elements of array (incl 0)
+ * and total number of bytes (incl. 0)
+ * Note. An empty array will have one null element
+ * But if arg is null, then *nelems set to 0, and *nbytes to 0
+ */
+static void arraysize(const char * const *arg, int *nelems, int *nbytes)
+{
+ int i, bytes, count;
+ const char * const *a = arg;
+ char *p;
+ int *q;
+ if (arg == 0) {
+ *nelems = 0;
+ *nbytes = 0;
+ return;
+ }
+ /* count the array elements and number of bytes */
+ for (count=0, bytes=0; *a != 0; count++, a++) {
+ bytes += strlen(*a)+1;
+ }
+ *nbytes = bytes;
+ *nelems = count+1;
+}
+
+/* copy the strings from arg[] into buf, starting at given offset
+ * return new offset to next free byte
+ */
+static int copystrings(char *buf, int offset, const char * const *arg) {
+ char *p;
+ const char * const *a;
+ int count=0;
+
+ if (arg == 0) {
+ return offset;
+ }
+ for (p=buf+offset, a=arg; *a != 0; a++) {
+ int len = strlen(*a) +1;
+ memcpy(p, *a, len);
+ p += len;
+ count += len;
+ }
+ return offset+count;
+}
+
+/**
+ * We are unusually paranoid; use of clone/vfork is
+ * especially likely to tickle gcc/glibc bugs.
+ */
+#ifdef __attribute_noinline__ /* See: sys/cdefs.h */
+__attribute_noinline__
+#endif
+
+#define START_CHILD_USE_CLONE 0 /* clone() currently disabled; see above. */
+
+#ifdef START_CHILD_USE_CLONE
+static pid_t
+cloneChild(ChildStuff *c) {
+#ifdef __linux__
+#define START_CHILD_CLONE_STACK_SIZE (64 * 1024)
+ /*
+ * See clone(2).
+ * Instead of worrying about which direction the stack grows, just
+ * allocate twice as much and start the stack in the middle.
+ */
+ if ((c->clone_stack = malloc(2 * START_CHILD_CLONE_STACK_SIZE)) == NULL)
+ /* errno will be set to ENOMEM */
+ return -1;
+ return clone(childProcess,
+ c->clone_stack + START_CHILD_CLONE_STACK_SIZE,
+ CLONE_VFORK | CLONE_VM | SIGCHLD, c);
+#else
+/* not available on Solaris / Mac */
+ assert(0);
+ return -1;
+#endif
+}
+#endif
+
+static pid_t
+vforkChild(ChildStuff *c) {
+ volatile pid_t resultPid;
+
+ /*
+ * We separate the call to vfork into a separate function to make
+ * very sure to keep stack of child from corrupting stack of parent,
+ * as suggested by the scary gcc warning:
+ * warning: variable 'foo' might be clobbered by 'longjmp' or 'vfork'
+ */
+ resultPid = vfork();
+
+ if (resultPid == 0) {
+ childProcess(c);
+ }
+ assert(resultPid != 0); /* childProcess never returns */
+ return resultPid;
+}
+
+static pid_t
+forkChild(ChildStuff *c) {
+ pid_t resultPid;
+
+ /*
+ * From Solaris fork(2): In Solaris 10, a call to fork() is
+ * identical to a call to fork1(); only the calling thread is
+ * replicated in the child process. This is the POSIX-specified
+ * behavior for fork().
+ */
+ resultPid = fork();
+
+ if (resultPid == 0) {
+ childProcess(c);
+ }
+ assert(resultPid != 0); /* childProcess never returns */
+ return resultPid;
+}
+
+#if defined(__solaris__) || defined(_ALLBSD_SOURCE) || defined(_AIX)
+static pid_t
+spawnChild(JNIEnv *env, jobject process, ChildStuff *c, const char *helperpath) {
+ pid_t resultPid;
+ jboolean isCopy;
+ int i, offset, rval, bufsize, magic;
+ char *buf, buf1[16];
+ char *hlpargs[2];
+ SpawnInfo sp;
+
+ /* need to tell helper which fd is for receiving the childstuff
+ * and which fd to send response back on
+ */
+ snprintf(buf1, sizeof(buf1), "%d:%d", c->childenv[0], c->fail[1]);
+ /* put the fd string as argument to the helper cmd */
+ hlpargs[0] = buf1;
+ hlpargs[1] = 0;
+
+ /* Following items are sent down the pipe to the helper
+ * after it is spawned.
+ * All strings are null terminated. All arrays of strings
+ * have an empty string for termination.
+ * - the ChildStuff struct
+ * - the SpawnInfo struct
+ * - the argv strings array
+ * - the envv strings array
+ * - the home directory string
+ * - the parentPath string
+ * - the parentPathv array
+ */
+ /* First calculate the sizes */
+ arraysize(c->argv, &sp.nargv, &sp.argvBytes);
+ bufsize = sp.argvBytes;
+ arraysize(c->envv, &sp.nenvv, &sp.envvBytes);
+ bufsize += sp.envvBytes;
+ sp.dirlen = c->pdir == 0 ? 0 : strlen(c->pdir)+1;
+ bufsize += sp.dirlen;
+ arraysize(parentPathv, &sp.nparentPathv, &sp.parentPathvBytes);
+ bufsize += sp.parentPathvBytes;
+ /* We need to clear FD_CLOEXEC if set in the fds[].
+ * Files are created FD_CLOEXEC in Java.
+ * Otherwise, they will be closed when the target gets exec'd */
+ for (i=0; i<3; i++) {
+ if (c->fds[i] != -1) {
+ int flags = fcntl(c->fds[i], F_GETFD);
+ if (flags & FD_CLOEXEC) {
+ fcntl(c->fds[i], F_SETFD, flags & (~1));
+ }
+ }
+ }
+
+ rval = posix_spawn(&resultPid, helperpath, 0, 0, (char * const *) hlpargs, environ);
+
+ if (rval != 0) {
+ return -1;
+ }
+
+ /* now the lengths are known, copy the data */
+ buf = NEW(char, bufsize);
+ if (buf == 0) {
+ return -1;
+ }
+ offset = copystrings(buf, 0, &c->argv[0]);
+ offset = copystrings(buf, offset, &c->envv[0]);
+ memcpy(buf+offset, c->pdir, sp.dirlen);
+ offset += sp.dirlen;
+ offset = copystrings(buf, offset, parentPathv);
+ assert(offset == bufsize);
+
+ magic = magicNumber();
+
+ /* write the two structs and the data buffer */
+ write(c->childenv[1], (char *)&magic, sizeof(magic)); // magic number first
+ write(c->childenv[1], (char *)c, sizeof(*c));
+ write(c->childenv[1], (char *)&sp, sizeof(sp));
+ write(c->childenv[1], buf, bufsize);
+ free(buf);
+
+ /* In this mode an external main() in invoked which calls back into
+ * childProcess() in this file, rather than directly
+ * via the statement below */
+ return resultPid;
+}
+#endif
+
+/*
+ * Start a child process running function childProcess.
+ * This function only returns in the parent.
+ */
+static pid_t
+startChild(JNIEnv *env, jobject process, ChildStuff *c, const char *helperpath) {
+ switch (c->mode) {
+ case MODE_VFORK:
+ return vforkChild(c);
+ case MODE_FORK:
+ return forkChild(c);
+#if defined(__solaris__) || defined(_ALLBSD_SOURCE) || defined(_AIX)
+ case MODE_POSIX_SPAWN:
+ return spawnChild(env, process, c, helperpath);
+#endif
+ default:
+ return -1;
+ }
+}
+
+JNIEXPORT jint JNICALL
+Java_java_lang_ProcessImpl_forkAndExec(JNIEnv *env,
+ jobject process,
+ jint mode,
+ jbyteArray helperpath,
+ jbyteArray prog,
+ jbyteArray argBlock, jint argc,
+ jbyteArray envBlock, jint envc,
+ jbyteArray dir,
+ jintArray std_fds,
+ jboolean redirectErrorStream)
+{
+ int errnum;
+ int resultPid = -1;
+ int in[2], out[2], err[2], fail[2], childenv[2];
+ jint *fds = NULL;
+ const char *phelperpath = NULL;
+ const char *pprog = NULL;
+ const char *pargBlock = NULL;
+ const char *penvBlock = NULL;
+ ChildStuff *c;
+
+ in[0] = in[1] = out[0] = out[1] = err[0] = err[1] = fail[0] = fail[1] = -1;
+ childenv[0] = childenv[1] = -1;
+
+ if ((c = NEW(ChildStuff, 1)) == NULL) return -1;
+ c->argv = NULL;
+ c->envv = NULL;
+ c->pdir = NULL;
+ c->clone_stack = NULL;
+
+ /* Convert prog + argBlock into a char ** argv.
+ * Add one word room for expansion of argv for use by
+ * execve_as_traditional_shell_script.
+ * This word is also used when using spawn mode
+ */
+ assert(prog != NULL && argBlock != NULL);
+ if ((phelperpath = getBytes(env, helperpath)) == NULL) goto Catch;
+ if ((pprog = getBytes(env, prog)) == NULL) goto Catch;
+ if ((pargBlock = getBytes(env, argBlock)) == NULL) goto Catch;
+ if ((c->argv = NEW(const char *, argc + 3)) == NULL) goto Catch;
+ c->argv[0] = pprog;
+ c->argc = argc + 2;
+ initVectorFromBlock(c->argv+1, pargBlock, argc);
+
+ if (envBlock != NULL) {
+ /* Convert envBlock into a char ** envv */
+ if ((penvBlock = getBytes(env, envBlock)) == NULL) goto Catch;
+ if ((c->envv = NEW(const char *, envc + 1)) == NULL) goto Catch;
+ initVectorFromBlock(c->envv, penvBlock, envc);
+ }
+
+ if (dir != NULL) {
+ if ((c->pdir = getBytes(env, dir)) == NULL) goto Catch;
+ }
+
+ assert(std_fds != NULL);
+ fds = (*env)->GetIntArrayElements(env, std_fds, NULL);
+ if (fds == NULL) goto Catch;
+
+ if ((fds[0] == -1 && pipe(in) < 0) ||
+ (fds[1] == -1 && pipe(out) < 0) ||
+ (fds[2] == -1 && pipe(err) < 0) ||
+ (pipe(childenv) < 0) ||
+ (pipe(fail) < 0)) {
+ throwIOException(env, errno, "Bad file descriptor");
+ goto Catch;
+ }
+ c->fds[0] = fds[0];
+ c->fds[1] = fds[1];
+ c->fds[2] = fds[2];
+
+ copyPipe(in, c->in);
+ copyPipe(out, c->out);
+ copyPipe(err, c->err);
+ copyPipe(fail, c->fail);
+ copyPipe(childenv, c->childenv);
+
+ c->redirectErrorStream = redirectErrorStream;
+ c->mode = mode;
+
+ resultPid = startChild(env, process, c, phelperpath);
+ assert(resultPid != 0);
+
+ if (resultPid < 0) {
+ switch (c->mode) {
+ case MODE_VFORK:
+ throwIOException(env, errno, "vfork failed");
+ break;
+ case MODE_FORK:
+ throwIOException(env, errno, "fork failed");
+ break;
+ case MODE_POSIX_SPAWN:
+ throwIOException(env, errno, "spawn failed");
+ break;
+ }
+ goto Catch;
+ }
+ close(fail[1]); fail[1] = -1; /* See: WhyCantJohnnyExec (childproc.c) */
+
+ switch (readFully(fail[0], &errnum, sizeof(errnum))) {
+ case 0: break; /* Exec succeeded */
+ case sizeof(errnum):
+ waitpid(resultPid, NULL, 0);
+ throwIOException(env, errnum, "Exec failed");
+ goto Catch;
+ default:
+ throwIOException(env, errno, "Read failed");
+ goto Catch;
+ }
+
+ fds[0] = (in [1] != -1) ? in [1] : -1;
+ fds[1] = (out[0] != -1) ? out[0] : -1;
+ fds[2] = (err[0] != -1) ? err[0] : -1;
+
+ Finally:
+ free(c->clone_stack);
+
+ /* Always clean up the child's side of the pipes */
+ closeSafely(in [0]);
+ closeSafely(out[1]);
+ closeSafely(err[1]);
+
+ /* Always clean up fail and childEnv descriptors */
+ closeSafely(fail[0]);
+ closeSafely(fail[1]);
+ closeSafely(childenv[0]);
+ closeSafely(childenv[1]);
+
+ releaseBytes(env, helperpath, phelperpath);
+ releaseBytes(env, prog, pprog);
+ releaseBytes(env, argBlock, pargBlock);
+ releaseBytes(env, envBlock, penvBlock);
+ releaseBytes(env, dir, c->pdir);
+
+ free(c->argv);
+ free(c->envv);
+ free(c);
+
+ if (fds != NULL)
+ (*env)->ReleaseIntArrayElements(env, std_fds, fds, 0);
+
+ return resultPid;
+
+ Catch:
+ /* Clean up the parent's side of the pipes in case of failure only */
+ closeSafely(in [1]); in[1] = -1;
+ closeSafely(out[0]); out[0] = -1;
+ closeSafely(err[0]); err[0] = -1;
+ goto Finally;
+}
+
+JNIEXPORT void JNICALL
+Java_java_lang_ProcessImpl_destroyProcess(JNIEnv *env,
+ jobject junk,
+ jint pid,
+ jboolean force)
+{
+ int sig = (force == JNI_TRUE) ? SIGKILL : SIGTERM;
+ kill(pid, sig);
+}