1/* 2 * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17#include <config.h> 18 19#include <sys/types.h> 20#include <sys/param.h> 21#include <sys/ioctl.h> 22 23#include <fcntl.h> 24#ifdef HAVE_UNISTD_H 25# include <unistd.h> 26#endif /* HAVE_UNISTD_H */ 27 28#include <pathnames.h> 29#include "missing.h" 30 31pid_t 32setsid() 33{ 34 int fd; 35 36#ifdef SETPGRP_VOID 37 if (setpgrp() == -1) 38#else 39 if (setpgrp(0, 0) == -1) 40#endif 41 return -1; 42# ifdef TIOCNOTTY 43 if ((fd = open(_PATH_TTY, O_RDWR, 0644)) != -1) { 44 (void) ioctl(fd, TIOCNOTTY, NULL); 45 close(fd); 46 } 47# endif 48 return getpid(); 49} 50