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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)perror.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/stdio/perror.c,v 1.9 2007/01/09 00:28:07 imp Exp $ 31 * $DragonFly: src/lib/libc/stdio/perror.c,v 1.7 2005/11/20 11:07:30 swildner Exp $ 32 */ 33 34 #include "namespace.h" 35 #include <sys/types.h> 36 #include <sys/uio.h> 37 #include <unistd.h> 38 #include <errno.h> 39 #include <limits.h> 40 #include <stdio.h> 41 #include <string.h> 42 #include "un-namespace.h" 43 #include "libc_private.h" 44 #include "local.h" 45 #include "priv_stdio.h" 46 47 void 48 perror(const char *s) 49 { 50 char msgbuf[NL_TEXTMAX]; 51 struct iovec *v; 52 struct iovec iov[4]; 53 54 v = iov; 55 if (s != NULL && *s != '\0') { 56 v->iov_base = __DECONST(char *, s); 57 v->iov_len = strlen(s); 58 v++; 59 v->iov_base = __DECONST(char *, ": "); 60 v->iov_len = 2; 61 v++; 62 } 63 strerror_r(errno, msgbuf, sizeof(msgbuf)); 64 v->iov_base = msgbuf; 65 v->iov_len = strlen(v->iov_base); 66 v++; 67 v->iov_base = __DECONST(char *, "\n"); 68 v->iov_len = 1; 69 FLOCKFILE(stderr); 70 __sflush(stderr); 71 _writev(stderr->pub._fileno, iov, (v - iov) + 1); 72 stderr->pub._flags &= ~__SOFF; 73 FUNLOCKFILE(stderr); 74 } 75