| /* |
| * 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); |
| 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; |
| char tmpbuf[1024]; |
| jstring s; |
| |
| if (errnum != 0) { |
| int ret = getErrorString(errnum, tmpbuf, sizeof(tmpbuf)); |
| if (ret != EINVAL) |
| detail = tmpbuf; |
| } |
| /* 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); |
| } |
