11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * the documentation and/or other materials provided with the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <unistd.h> 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <fcntl.h> 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint daemon( int nochdir, int noclose ) 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pid_t pid; 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ( !nochdir && chdir("/") != 0 ) 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ( !noclose ) 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int fd = open("/dev/null", O_RDWR); 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ( fd < 0 ) 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ( dup2( fd, 0 ) < 0 || 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project dup2( fd, 1 ) < 0 || 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project dup2( fd, 2 ) < 0 ) 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project close(fd); 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project close(fd); 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pid = fork(); 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (pid < 0) 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (pid > 0) 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project _exit(0); 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ( setsid() < 0 ) 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return -1; 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return 0; 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 69