glibc/stdio-common/perror.c
Ulrich Drepper 6293b80374 Update.
2001-08-17  Ulrich Drepper  <drepper@redhat.com>

	* sunrpc/svc_simple.c (universal): Use __write instead of write.

	* wcsmbs/wcscoll.c: Also define __wcscoll.
	* include/wchar.h: Declare __wcscoll.

	* libio/fwprintf.c: Use __vfwprintf instead of vfwprintf.
	* libio/vwprintf.c: Likewise.
	* libio/wprintf.c: Likewise.

	* iconv/gconv_cache.c: Use __munmap instead of munmap.

	* posix/regex.c [_LIBC] (convert_mbs_to_wcs): Use __mbrtowc
	instead of mbrtowc.
	[_LIBC]: Use __iswctype instead of iswctype, __wcslen instead of
	wcslen, and __wcscoll instead of wcscoll.

	* sysdeps/unix/sockatmark.c (sockatmark): Use __ioctl instead of ioctl.

	* sysdeps/unix/sysv/linux/gai_sigqueue.c (__gai_sigqueue): Use
	__getuid instead of getuid.

	* stdio-common/perror.c (perror): Use __close instead of close.
	* iconv/gconv_cache.c (__gconv_load_cache): Likewise.
	* libio/freopen.c (freopen): Likewise.
	* libio/freopen64.c (freopen64): Likewise.
2001-08-17 07:51:36 +00:00

88 lines
2.6 KiB
C

/* Copyright (C) 1991-1993,1997,1998,2000,2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#ifdef USE_IN_LIBIO
# include "libioP.h"
#endif
static void
perror_internal (FILE *fp, const char *s)
{
char buf[1024];
int errnum = errno;
const char *colon;
const char *errstring;
if (s == NULL || *s == '\0')
s = colon = "";
else
colon = ": ";
errstring = __strerror_r (errnum, buf, sizeof buf);
#ifdef USE_IN_LIBIO
if (_IO_fwide (fp, 0) > 0)
(void) __fwprintf (fp, L"%s%s%s\n", s, colon, errstring);
else
#endif
(void) fprintf (fp, "%s%s%s\n", s, colon, errstring);
}
/* Print a line on stderr consisting of the text in S, a colon, a space,
a message describing the meaning of the contents of `errno' and a newline.
If S is NULL or "", the colon and space are omitted. */
void
perror (const char *s)
{
FILE *fp;
int fd = -1;
/* The standard says that 'perror' must not change the orientation
of the stream. What is supposed to happen when the stream isn't
oriented yet? In this case we'll create a new stream which is
using the same underlying file descriptor. */
if (__builtin_expect (_IO_fwide (stderr, 0) != 0, 1)
|| fileno_unlocked (stderr) == -1
|| (fd = __dup (fileno_unlocked (stderr))) == -1
|| (fp = fdopen (fd, "w+")) == NULL)
{
if (__builtin_expect (fd != -1, 0))
__close (fd);
/* Use standard error as is. */
perror_internal (stderr, s);
}
else
{
/* We don't have to do any special hacks regarding the file
position. Since the stderr stream wasn't used so far we just
write to the descriptor. */
perror_internal (fp, s);
/* Close the stream. */
fclose (fp);
((_IO_FILE *) stderr)->_offset = _IO_pos_BAD;
}
}