/*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* Make FD be the controlling terminal, stdin, stdout, and stderr; then close FD. Returns 0 on success, nonzero on error. */ #include <sys/param.h> #include <sys/ioctl.h> #include <unistd.h> #include <fcntl.h> #include <utmp.h> int login_tty(int fd) { (void) setsid(); #ifdef TIOCSCTTY if (ioctl(fd, TIOCSCTTY, (char *)NULL) == -1) return (-1); #else { /* This might work. */ char *fdname = ttyname (fd); int newfd; if (fdname) { if (fd != 0) (void) close (0); if (fd != 1) (void) close (1); if (fd != 2) (void) close (2); newfd = open (fdname, O_RDWR); (void) close (newfd); } } #endif (void) dup2(fd, 0); (void) dup2(fd, 1); (void) dup2(fd, 2); if (fd > 2) (void) close(fd); return (0); }