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131 lines
2.7 KiB
131 lines
2.7 KiB
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include "hardware_legacy/power.h"
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int main(int argc, char **argv)
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{
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int pid, fd, mode;
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unsigned int delay = 0;
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int status = 0;
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char *file = 0;
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char lockid[32];
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if (argc < 2) {
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printf("Usage: %s [-f logfile] [-a] [-d delay] <program>\n", argv[0]);
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exit(1);
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}
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close(0); open("/dev/null", 0);
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close(1);
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mode = O_TRUNC;
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while(**++argv == '-') {
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while(*++*argv) {
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switch(**argv) {
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case 'f':
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if(*++*argv)
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file = *argv;
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else
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file = *++argv;
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goto next_arg;
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case 'd':
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if(*++*argv)
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delay = atoi(*argv);
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else
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delay = atoi(*++argv);
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goto next_arg;
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case 'a':
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mode = O_APPEND;
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break;
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}
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}
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next_arg: ;
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}
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if (file) {
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if(open(file, O_WRONLY|mode|O_CREAT, 0666) < 0) {
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perror(file);
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exit(1);
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}
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}
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else {
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if(open("/dev/null", O_WRONLY) < 0) {
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perror("/dev/null");
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exit(1);
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}
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}
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switch(pid = fork()) {
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case -1:
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perror(argv[0]);
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exit(1);
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break;
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case 0:
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fflush(stdout);
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close(2); dup(1); /* join stdout and stderr */
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chdir("/");
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umask(0);
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setpgrp();
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setsid();
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for (fd = 3; fd < 256; fd++) {
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close(fd);
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}
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if(delay) {
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snprintf(lockid, 32, "daemonize%d", (int) getpid());
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acquire_wake_lock(PARTIAL_WAKE_LOCK, lockid);
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}
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switch(pid = fork()) {
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case -1:
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break;
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case 0:
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if(delay) {
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sleep(delay);
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}
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execv(argv[0], argv);
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execvp(argv[0], argv);
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perror(argv[0]);
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break;
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default:
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if(delay) {
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waitpid(pid, &status, 0);
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release_wake_lock(lockid);
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}
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_exit(0);
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}
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_exit(1);
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break;
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default:
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exit(0);
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break;
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}
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}
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/* vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab */
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