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