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/*
* 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 <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <logwrap/logwrap.h>
#include "cutils/log.h"
void fatal(const char *msg) {
fprintf(stderr, "%s", msg);
ALOG(LOG_ERROR, "logwrapper", "%s", msg);
exit(-1);
}
void usage() {
fatal(
"Usage: logwrapper [-d] 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"
"-d: Causes logwrapper to SIGSEGV when BINARY terminates\n"
" fault address is set to the status of wait()\n");
}
int main(int argc, char* argv[]) {
int seg_fault_on_exit = 0;
int status = 0xAAAA;
int rc;
if (argc < 2) {
usage();
}
if (strncmp(argv[1], "-d", 2) == 0) {
seg_fault_on_exit = 1;
argc--;
argv++;
}
if (argc < 2) {
usage();
}
rc = android_fork_execvp(argc - 1, &argv[1], &status, true, true);
if (!rc) {
if (WIFEXITED(status))
rc = WEXITSTATUS(status);
else
rc = -ECHILD;
}
if (seg_fault_on_exit) {
*(int *)status = 0; // causes SIGSEGV with fault_address = status
}
return rc;
}
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