| /* |
| * Copyright (C) 2008 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. |
| */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| #include <android/log.h> |
| #include <cutils/klog.h> |
| #include <logwrap/logwrap.h> |
| |
| void fatal(const char *msg) { |
| fprintf(stderr, "%s", msg); |
| ALOG(LOG_ERROR, "logwrapper", "%s", msg); |
| exit(-1); |
| } |
| |
| void usage() { |
| fatal( |
| "Usage: logwrapper [-a] [-d] [-k] BINARY [ARGS ...]\n" |
| "\n" |
| "Forks and executes BINARY ARGS, redirecting stdout and stderr to\n" |
| "the Android logging system. Tag is set to BINARY, priority is\n" |
| "always LOG_INFO.\n" |
| "\n" |
| "-a: Causes logwrapper to do abbreviated logging.\n" |
| " This logs up to the first 4K and last 4K of the command\n" |
| " being run, and logs the output when the command exits\n" |
| "-d: Causes logwrapper to SIGSEGV when BINARY terminates\n" |
| " fault address is set to the status of wait()\n" |
| "-k: Causes logwrapper to log to the kernel log instead of\n" |
| " the Android system log\n"); |
| } |
| |
| int main(int argc, char* argv[]) { |
| int seg_fault_on_exit = 0; |
| int log_target = LOG_ALOG; |
| bool abbreviated = false; |
| int ch; |
| int status = 0xAAAA; |
| int rc; |
| |
| while ((ch = getopt(argc, argv, "adk")) != -1) { |
| switch (ch) { |
| case 'a': |
| abbreviated = true; |
| break; |
| case 'd': |
| seg_fault_on_exit = 1; |
| break; |
| case 'k': |
| log_target = LOG_KLOG; |
| klog_set_level(6); |
| break; |
| case '?': |
| default: |
| usage(); |
| } |
| } |
| argc -= optind; |
| argv += optind; |
| |
| if (argc < 1) { |
| usage(); |
| } |
| |
| rc = android_fork_execvp_ext(argc, &argv[0], &status, true, |
| log_target, abbreviated, NULL, NULL, 0); |
| if (!rc) { |
| if (WIFEXITED(status)) |
| rc = WEXITSTATUS(status); |
| else |
| rc = -ECHILD; |
| } |
| |
| if (seg_fault_on_exit) { |
| uintptr_t fault_address = (uintptr_t) status; |
| *(int *) fault_address = 0; // causes SIGSEGV with fault_address = status |
| } |
| |
| return rc; |
| } |