/*- * Copyright (c) 1991, 1993, 1994 * 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. */ #ifndef lint #if 0 static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/2/94"; #endif #endif /* not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/types.h> #include <sys/stat.h> #include <err.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "stty.h" #include "extern.h" /* * Gross, but since we're changing the control descriptor from 1 to 0, most * users will be probably be doing "stty > /dev/sometty" by accident. If 1 * and 2 are both ttys, but not the same, assume that 1 was incorrectly * redirected. */ void checkredirect(void) { struct stat sb1, sb2; if (isatty(STDOUT_FILENO) && isatty(STDERR_FILENO) && !fstat(STDOUT_FILENO, &sb1) && !fstat(STDERR_FILENO, &sb2) && (sb1.st_rdev != sb2.st_rdev)) warnx("stdout appears redirected, but stdin is the control descriptor"); } |