Support gnu error(), patch contributed by Andrew Ip <aip@cwlinux.com>

libc/misc/Makefile

@@ -26,7 +26,8 @@ include $(TOPDIR)Rules.mak
 
 
 DIRS = assert ctype dirent file fnmatch glob internals lsearch \
-       mntent syslog time utmp tsearch locale sysvipc statfs insremque
+       mntent syslog time utmp tsearch locale sysvipc statfs \
+       error insremque
 ifeq ($(strip $(INCLUDE_REGEX)),true)
 DIRS += regex
 endif

libc/misc/error/Makefile

@@ -0,0 +1,39 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2002 Erik Andersen <andersen@uclibc.org>
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program 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 Library General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Library General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+TOPDIR=../../../
+include $(TOPDIR)Rules.mak
+
+CSRC=error.c
+COBJS=$(patsubst %.c,%.o, $(CSRC))
+OBJS=$(COBJS)
+
+all: $(OBJS) $(LIBC)
+
+$(LIBC): ar-target
+
+ar-target: $(OBJS)
+	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
+
+$(COBJS): %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
+clean:
+	rm -f *.[oa] *~ core
+

libc/misc/error/error.c

@@ -0,0 +1,98 @@
+/* Error handler for noninteractive utilities
+   Copyright (C) 1990-1998, 2000, 2001 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.  Its master source is NOT part of
+   the C library, however.  The master source lives in /gd/gnu/lib.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
+/* Adjusted slightly by Erik Andersen <andersen@uclibc.org> */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include "error.h"
+
+
+/* This variable is incremented each time `error' is called.  */
+unsigned int error_message_count;
+/* Sometimes we want to have at most one error per line.  This
+   variable controls whether this mode is selected or not.  */
+static int error_one_per_line;
+
+
+void __error (int status, int errnum, const char *message, ...)
+{
+    va_list args;
+
+    fflush (stdout);
+
+    va_start (args, message);
+    vfprintf (stderr, message, args);
+    va_end (args);
+    ++error_message_count;
+    if (errnum) {
+	fprintf (stderr, ": %s", strerror (errnum));
+    }
+    putc ('\n', stderr);
+    if (status)
+	exit (status);
+}
+
+void __error_at_line (int status, int errnum, const char *file_name,
+	       unsigned int line_number, const char *message, ...)
+{
+    va_list args;
+
+    if (error_one_per_line) {
+	static const char *old_file_name;
+	static unsigned int old_line_number;
+
+	if (old_line_number == line_number &&
+		(file_name == old_file_name || !strcmp (old_file_name, file_name)))
+	    /* Simply return and print nothing.  */
+	    return;
+
+	old_file_name = file_name;
+	old_line_number = line_number;
+    }
+
+    fflush (stdout);
+
+    if (file_name != NULL)
+	fprintf (stderr, "%s:%d: ", file_name, line_number);
+
+    va_start (args, message);
+    vfprintf (stderr, message, args);
+    va_end (args);
+
+    ++error_message_count;
+    if (errnum) {
+	fprintf (stderr, ": %s", strerror (errnum));
+    }
+    putc ('\n', stderr);
+    if (status)
+	exit (status);
+}
+
+/* Use the weaks here in an effort at controlling namespace pollution */
+#undef error
+#undef error_at_line
+weak_alias (__error, error)
+weak_alias (__error_at_line, error_at_line)
+