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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:31:44 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:31:44 -0800 |
commit | 9066cfe9886ac131c34d59ed0e2d287b0e3c0087 (patch) | |
tree | d88beb88001f2482911e3d28e43833b50e4b4e97 /core/jni/com_android_internal_os_ZygoteInit.cpp | |
parent | d83a98f4ce9cfa908f5c54bbd70f03eec07e7553 (diff) | |
download | frameworks_base-9066cfe9886ac131c34d59ed0e2d287b0e3c0087.zip frameworks_base-9066cfe9886ac131c34d59ed0e2d287b0e3c0087.tar.gz frameworks_base-9066cfe9886ac131c34d59ed0e2d287b0e3c0087.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'core/jni/com_android_internal_os_ZygoteInit.cpp')
-rw-r--r-- | core/jni/com_android_internal_os_ZygoteInit.cpp | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/core/jni/com_android_internal_os_ZygoteInit.cpp b/core/jni/com_android_internal_os_ZygoteInit.cpp new file mode 100644 index 0000000..ada4dd3 --- /dev/null +++ b/core/jni/com_android_internal_os_ZygoteInit.cpp @@ -0,0 +1,367 @@ +/* + * Copyright (C) 2007 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#define LOG_TAG "Zygote" + +#include <sys/types.h> +#include <unistd.h> +#include <fcntl.h> +#include <utils/misc.h> +#include <errno.h> +#include <sys/select.h> + +#include "jni.h" +#include <JNIHelp.h> +#include "android_runtime/AndroidRuntime.h" + +#ifdef HAVE_ANDROID_OS +#include <linux/capability.h> +#include <linux/prctl.h> +#include <sys/prctl.h> +extern "C" int capget(cap_user_header_t hdrp, cap_user_data_t datap); +extern "C" int capset(cap_user_header_t hdrp, const cap_user_data_t datap); +#endif + + +namespace android { + +/* + * In class com.android.internal.os.ZygoteInit: + * private static native boolean setreuid(int ruid, int euid) + */ +static jint com_android_internal_os_ZygoteInit_setreuid( + JNIEnv* env, jobject clazz, jint ruid, jint euid) +{ + int err; + + errno = 0; + err = setreuid(ruid, euid); + + //LOGI("setreuid(%d,%d) err %d errno %d", ruid, euid, err, errno); + + return errno; +} + +/* + * In class com.android.internal.os.ZygoteInit: + * private static native int setregid(int rgid, int egid) + */ +static jint com_android_internal_os_ZygoteInit_setregid( + JNIEnv* env, jobject clazz, jint rgid, jint egid) +{ + int err; + + errno = 0; + err = setregid(rgid, egid); + + //LOGI("setregid(%d,%d) err %d errno %d", rgid, egid, err, errno); + + return errno; +} + +/* + * In class com.android.internal.os.ZygoteInit: + * private static native int setpgid(int rgid, int egid) + */ +static jint com_android_internal_os_ZygoteInit_setpgid( + JNIEnv* env, jobject clazz, jint pid, jint pgid) +{ + int err; + + errno = 0; + + err = setpgid(pid, pgid); + + return errno; +} + +/* + * In class com.android.internal.os.ZygoteInit: + * private static native int getpgid(int pid) + */ +static jint com_android_internal_os_ZygoteInit_getpgid( + JNIEnv* env, jobject clazz, jint pid) +{ + pid_t ret; + ret = getpgid(pid); + + if (ret < 0) { + jniThrowIOException(env, errno); + } + + return ret; +} + +static void com_android_internal_os_ZygoteInit_reopenStdio(JNIEnv* env, + jobject clazz, jobject in, jobject out, jobject errfd) +{ + int fd; + int err; + + fd = jniGetFDFromFileDescriptor(env, in); + + if (env->ExceptionOccurred() != NULL) { + return; + } + + do { + err = dup2(fd, STDIN_FILENO); + } while (err < 0 && errno == EINTR); + + fd = jniGetFDFromFileDescriptor(env, out); + + if (env->ExceptionOccurred() != NULL) { + return; + } + + do { + err = dup2(fd, STDOUT_FILENO); + } while (err < 0 && errno == EINTR); + + fd = jniGetFDFromFileDescriptor(env, errfd); + + if (env->ExceptionOccurred() != NULL) { + return; + } + + do { + err = dup2(fd, STDERR_FILENO); + } while (err < 0 && errno == EINTR); +} + +static void com_android_internal_os_ZygoteInit_closeDescriptor(JNIEnv* env, + jobject clazz, jobject descriptor) +{ + int fd; + int err; + + fd = jniGetFDFromFileDescriptor(env, descriptor); + + if (env->ExceptionOccurred() != NULL) { + return; + } + + do { + err = close(fd); + } while (err < 0 && errno == EINTR); + + if (err < 0) { + jniThrowIOException(env, errno); + return; + } +} + +static void com_android_internal_os_ZygoteInit_setCloseOnExec (JNIEnv *env, + jobject clazz, jobject descriptor, jboolean flag) +{ + int fd; + int err; + int fdFlags; + + fd = jniGetFDFromFileDescriptor(env, descriptor); + + if (env->ExceptionOccurred() != NULL) { + return; + } + + fdFlags = fcntl(fd, F_GETFD); + + if (fdFlags < 0) { + jniThrowIOException(env, errno); + return; + } + + if (flag) { + fdFlags |= FD_CLOEXEC; + } else { + fdFlags &= ~FD_CLOEXEC; + } + + err = fcntl(fd, F_SETFD, fdFlags); + + if (err < 0) { + jniThrowIOException(env, errno); + return; + } +} + +static void com_android_internal_os_ZygoteInit_setCapabilities (JNIEnv *env, + jobject clazz, jlong permitted, jlong effective) +{ +#ifdef HAVE_ANDROID_OS + struct __user_cap_header_struct capheader; + struct __user_cap_data_struct capdata; + int err; + + memset (&capheader, 0, sizeof(capheader)); + memset (&capdata, 0, sizeof(capdata)); + + capheader.version = _LINUX_CAPABILITY_VERSION; + capheader.pid = 0; + + // As of this writing, capdata is __u32, but that's expected + // to change... + capdata.effective = effective; + capdata.permitted = permitted; + + err = capset (&capheader, &capdata); + + if (err < 0) { + jniThrowIOException(env, errno); + return; + } +#endif /* HAVE_ANDROID_OS */ +} + +static jlong com_android_internal_os_ZygoteInit_capgetPermitted (JNIEnv *env, + jobject clazz, jint pid) +{ +#ifndef HAVE_ANDROID_OS + return (jlong)0; +#else + struct __user_cap_header_struct capheader; + struct __user_cap_data_struct capdata; + int err; + + memset (&capheader, 0, sizeof(capheader)); + memset (&capdata, 0, sizeof(capdata)); + + capheader.version = _LINUX_CAPABILITY_VERSION; + capheader.pid = pid; + + err = capget (&capheader, &capdata); + + if (err < 0) { + jniThrowIOException(env, errno); + return 0; + } + + return (jlong) capdata.permitted; +#endif /* HAVE_ANDROID_OS */ +} + +static jint com_android_internal_os_ZygoteInit_selectReadable ( + JNIEnv *env, jobject clazz, jobjectArray fds) +{ + if (fds == NULL) { + jniThrowException(env, "java/lang/NullPointerException", + "fds == null"); + return -1; + } + + jsize length = env->GetArrayLength(fds); + fd_set fdset; + + if (env->ExceptionOccurred() != NULL) { + return -1; + } + + FD_ZERO(&fdset); + + int nfds = 0; + for (jsize i = 0; i < length; i++) { + jobject fdObj = env->GetObjectArrayElement(fds, i); + if (env->ExceptionOccurred() != NULL) { + return -1; + } + if (fdObj == NULL) { + continue; + } + int fd = jniGetFDFromFileDescriptor(env, fdObj); + if (env->ExceptionOccurred() != NULL) { + return -1; + } + + FD_SET(fd, &fdset); + + if (fd >= nfds) { + nfds = fd + 1; + } + } + + int err; + do { + err = select (nfds, &fdset, NULL, NULL, NULL); + } while (err < 0 && errno == EINTR); + + if (err < 0) { + jniThrowIOException(env, errno); + return -1; + } + + for (jsize i = 0; i < length; i++) { + jobject fdObj = env->GetObjectArrayElement(fds, i); + if (env->ExceptionOccurred() != NULL) { + return -1; + } + if (fdObj == NULL) { + continue; + } + int fd = jniGetFDFromFileDescriptor(env, fdObj); + if (env->ExceptionOccurred() != NULL) { + return -1; + } + if (FD_ISSET(fd, &fdset)) { + return (jint)i; + } + } + return -1; +} + +static jobject com_android_internal_os_ZygoteInit_createFileDescriptor ( + JNIEnv *env, jobject clazz, jint fd) +{ + return jniCreateFileDescriptor(env, fd); +} + +/* + * JNI registration. + */ +static JNINativeMethod gMethods[] = { + /* name, signature, funcPtr */ + { "setreuid", "(II)I", + (void*) com_android_internal_os_ZygoteInit_setreuid }, + { "setregid", "(II)I", + (void*) com_android_internal_os_ZygoteInit_setregid }, + { "setpgid", "(II)I", + (void *) com_android_internal_os_ZygoteInit_setpgid }, + { "getpgid", "(I)I", + (void *) com_android_internal_os_ZygoteInit_getpgid }, + { "reopenStdio", + "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;" + "Ljava/io/FileDescriptor;)V", + (void *) com_android_internal_os_ZygoteInit_reopenStdio}, + { "closeDescriptor", "(Ljava/io/FileDescriptor;)V", + (void *) com_android_internal_os_ZygoteInit_closeDescriptor}, + { "setCloseOnExec", "(Ljava/io/FileDescriptor;Z)V", + (void *) com_android_internal_os_ZygoteInit_setCloseOnExec}, + { "setCapabilities", "(JJ)V", + (void *) com_android_internal_os_ZygoteInit_setCapabilities }, + { "capgetPermitted", "(I)J", + (void *) com_android_internal_os_ZygoteInit_capgetPermitted }, + { "selectReadable", "([Ljava/io/FileDescriptor;)I", + (void *) com_android_internal_os_ZygoteInit_selectReadable }, + { "createFileDescriptor", "(I)Ljava/io/FileDescriptor;", + (void *) com_android_internal_os_ZygoteInit_createFileDescriptor } +}; +int register_com_android_internal_os_ZygoteInit(JNIEnv* env) +{ + return AndroidRuntime::registerNativeMethods(env, + "com/android/internal/os/ZygoteInit", gMethods, NELEM(gMethods)); +} + +}; // namespace android + |