1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: src/lib/libc/stdio/perror.c,v 1.3.6.1 2001/03/05 11:27:49 obrien Exp $ 34 * $DragonFly: src/lib/libc/stdio/perror.c,v 1.5 2005/01/31 22:29:40 dillon Exp $ 35 * 36 * @(#)perror.c 8.1 (Berkeley) 6/4/93 37 */ 38 39 #include "namespace.h" 40 #include <sys/types.h> 41 #include <sys/uio.h> 42 #include <unistd.h> 43 #include <errno.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include "un-namespace.h" 47 48 void 49 perror(const char *s) 50 { 51 struct iovec *v; 52 struct iovec iov[4]; 53 54 v = iov; 55 if (s != NULL && *s != '\0') { 56 v->iov_base = (char *)s; 57 v->iov_len = strlen(s); 58 v++; 59 v->iov_base = ": "; 60 v->iov_len = 2; 61 v++; 62 } 63 v->iov_base = strerror(errno); 64 v->iov_len = strlen(v->iov_base); 65 v++; 66 v->iov_base = "\n"; 67 v->iov_len = 1; 68 (void)_writev(STDERR_FILENO, iov, (v - iov) + 1); 69 } 70