perror.c revision 40731
1251881Speter/* 2251881Speter * Copyright (c) 1988, 1993 3251881Speter * The Regents of the University of California. All rights reserved. 4251881Speter * 5251881Speter * Redistribution and use in source and binary forms, with or without 6251881Speter * modification, are permitted provided that the following conditions 7251881Speter * are met: 8251881Speter * 1. Redistributions of source code must retain the above copyright 9251881Speter * notice, this list of conditions and the following disclaimer. 10251881Speter * 2. Redistributions in binary form must reproduce the above copyright 11251881Speter * notice, this list of conditions and the following disclaimer in the 12251881Speter * documentation and/or other materials provided with the distribution. 13251881Speter * 3. All advertising materials mentioning features or use of this software 14251881Speter * must display the following acknowledgement: 15251881Speter * This product includes software developed by the University of 16251881Speter * California, Berkeley and its contributors. 17251881Speter * 4. Neither the name of the University nor the names of its contributors 18251881Speter * may be used to endorse or promote products derived from this software 19251881Speter * without specific prior written permission. 20251881Speter * 21251881Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22251881Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23251881Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24251881Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25251881Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26251881Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27251881Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28251881Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29251881Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30251881Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31251881Speter * SUCH DAMAGE. 32251881Speter */ 33251881Speter 34251881Speter#if defined(LIBC_SCCS) && !defined(lint) 35251881Speterstatic char sccsid[] = "@(#)perror.c 8.1 (Berkeley) 6/4/93"; 36251881Speter#endif /* LIBC_SCCS and not lint */ 37251881Speter 38251881Speter#include <sys/types.h> 39251881Speter#include <sys/uio.h> 40251881Speter#include <unistd.h> 41251881Speter#include <errno.h> 42251881Speter#include <stdio.h> 43251881Speter#include <string.h> 44251881Speter 45251881Spetervoid 46251881Speterperror(s) 47251881Speter const char *s; 48251881Speter{ 49251881Speter register struct iovec *v; 50251881Speter struct iovec iov[4]; 51251881Speter 52251881Speter v = iov; 53251881Speter if (s != NULL && *s != '\0') { 54251881Speter v->iov_base = (char *)s; 55251881Speter v->iov_len = strlen(s); 56251881Speter v++; 57251881Speter v->iov_base = ": "; 58251881Speter v->iov_len = 2; 59251881Speter v++; 60251881Speter } 61251881Speter v->iov_base = strerror(errno); 62251881Speter v->iov_len = strlen(v->iov_base); 63251881Speter v++; 64251881Speter v->iov_base = "\n"; 65251881Speter v->iov_len = 1; 66251881Speter (void)writev(STDERR_FILENO, iov, (v - iov) + 1); 67251881Speter} 68251881Speter