perror.c revision 331722
1331722Seadler/* 21573Srgrimes * Copyright (c) 1988, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 13249808Semaste * 3. Neither the name of the University nor the names of its contributors 141573Srgrimes * may be used to endorse or promote products derived from this software 151573Srgrimes * without specific prior written permission. 161573Srgrimes * 171573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271573Srgrimes * SUCH DAMAGE. 281573Srgrimes */ 291573Srgrimes 301573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 311573Srgrimesstatic char sccsid[] = "@(#)perror.c 8.1 (Berkeley) 6/4/93"; 321573Srgrimes#endif /* LIBC_SCCS and not lint */ 3392986Sobrien#include <sys/cdefs.h> 3492986Sobrien__FBSDID("$FreeBSD: stable/11/lib/libc/stdio/perror.c 331722 2018-03-29 02:50:57Z eadler $"); 351573Srgrimes 3671579Sdeischen#include "namespace.h" 371573Srgrimes#include <sys/types.h> 381573Srgrimes#include <sys/uio.h> 391573Srgrimes#include <unistd.h> 401573Srgrimes#include <errno.h> 41108089Stjr#include <limits.h> 421573Srgrimes#include <stdio.h> 431573Srgrimes#include <string.h> 4471579Sdeischen#include "un-namespace.h" 45108090Stjr#include "libc_private.h" 46108090Stjr#include "local.h" 471573Srgrimes 481573Srgrimesvoid 49249810Semasteperror(const char *s) 501573Srgrimes{ 51108089Stjr char msgbuf[NL_TEXTMAX]; 5292889Sobrien struct iovec *v; 531573Srgrimes struct iovec iov[4]; 541573Srgrimes 551573Srgrimes v = iov; 5640731Srnordier if (s != NULL && *s != '\0') { 571573Srgrimes v->iov_base = (char *)s; 581573Srgrimes v->iov_len = strlen(s); 591573Srgrimes v++; 601573Srgrimes v->iov_base = ": "; 611573Srgrimes v->iov_len = 2; 621573Srgrimes v++; 631573Srgrimes } 64108089Stjr strerror_r(errno, msgbuf, sizeof(msgbuf)); 65108089Stjr v->iov_base = msgbuf; 661573Srgrimes v->iov_len = strlen(v->iov_base); 671573Srgrimes v++; 681573Srgrimes v->iov_base = "\n"; 691573Srgrimes v->iov_len = 1; 70320942Skib FLOCKFILE_CANCELSAFE(stderr); 71108090Stjr __sflush(stderr); 72108090Stjr (void)_writev(stderr->_file, iov, (v - iov) + 1); 73108090Stjr stderr->_flags &= ~__SOFF; 74320942Skib FUNLOCKFILE_CANCELSAFE(); 751573Srgrimes} 76