--- a/jdk/src/java.base/unix/native/libjava/UNIXProcess_md.c Mon Jan 26 15:46:47 2015 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,724 +0,0 @@
-/*
- * Copyright (c) 1995, 2013, 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_UNIXProcess_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_UNIXProcess_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_UNIXProcess_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_UNIXProcess_destroyProcess(JNIEnv *env,
- jobject junk,
- jint pid,
- jboolean force)
-{
- int sig = (force == JNI_TRUE) ? SIGKILL : SIGTERM;
- kill(pid, sig);
-}