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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)perror.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "namespace.h" 41 #include <sys/types.h> 42 #include <sys/uio.h> 43 #include <unistd.h> 44 #include <errno.h> 45 #include <limits.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include "un-namespace.h" 49 #include "libc_private.h" 50 #include "local.h" 51 52 void 53 perror(s) 54 const char *s; 55 { 56 char msgbuf[NL_TEXTMAX]; 57 struct iovec *v; 58 struct iovec iov[4]; 59 60 v = iov; 61 if (s != NULL && *s != '\0') { 62 v->iov_base = (char *)s; 63 v->iov_len = strlen(s); 64 v++; 65 v->iov_base = ": "; 66 v->iov_len = 2; 67 v++; 68 } 69 strerror_r(errno, msgbuf, sizeof(msgbuf)); 70 v->iov_base = msgbuf; 71 v->iov_len = strlen(v->iov_base); 72 v++; 73 v->iov_base = "\n"; 74 v->iov_len = 1; 75 FLOCKFILE(stderr); 76 __sflush(stderr); 77 (void)_writev(stderr->_file, iov, (v - iov) + 1); 78 stderr->_flags &= ~__SOFF; 79 FUNLOCKFILE(stderr); 80 } 81