/*
 *	Ported to Linux's Second Extended File System as part of the
 *	dump and restore backup suit
 *	Remy Card <card@Linux.EU.Org>, 1994-1997
 *	Stelian Pop <stelian@popies.net>, 1999-2000
 *	Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
 */

/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char rcsid[] =
	"$Id: compaterr.c,v 1.11 2003/10/26 16:05:46 stelian Exp $";
#endif /* not lint */

#include <config.h>
#include <sys/types.h>
#include <compaterr.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

extern char *__progname;		/* Program name, from crt0. */

#if !defined(HAVE_ERR) || !defined(HAVE_ERRX) || !defined(HAVE_VERR) || !defined(HAVE_VERRX) || !defined(HAVE_VWARN) || !defined(HAVE_VWARNX) || !defined(HAVE_WARN) || !defined(HAVE_WARNX)

__BEGIN_DECLS
__dead void     errc __P((int, int, const char *, ...));
__dead void     verrc __P((int, int, const char *, _BSD_VA_LIST_));
void            warnc __P((int, const char *, ...));
void            vwarnc __P((int, const char *, _BSD_VA_LIST_));
void            err_set_file __P((void *));
void            err_set_exit __P((void (*)(int)));
__END_DECLS

static void (*err_exit)(int);

static FILE *err_file; /* file to use for error output */
/*
 * This is declared to take a `void *' so that the caller is not required
 * to include <stdio.h> first.  However, it is really a `FILE *', and the
 * manual page documents it as such.
 */
void
err_set_file(void *fp)
{
	if (fp)
		err_file = fp;
	else
		err_file = stderr;
}

void
err_set_exit(void (*ef)(int))
{
	err_exit = ef;
}

__dead void
errc(int eval, int code, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	verrc(eval, code, fmt, ap);
	va_end(ap);
}

__dead void
verrc(int eval, int code, const char *fmt, va_list ap)
{
	if (err_file == 0)
		err_set_file((FILE *)0);
	fprintf(err_file, "%s: ", __progname);
	if (fmt != NULL) {
		vfprintf(err_file, fmt, ap);
		fprintf(err_file, ": ");
	}
	fprintf(err_file, "%s\n", strerror(code));
	if (err_exit)
		err_exit(eval);
	exit(eval);
}

void
warnc(int code, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	vwarnc(code, fmt, ap);
	va_end(ap);
}

void
vwarnc(int code, const char *fmt, va_list ap)
{
	if (err_file == 0)
		err_set_file((FILE *)0);
	fprintf(err_file, "%s: ", __progname);
	if (fmt != NULL) {
		vfprintf(err_file, fmt, ap);
		fprintf(err_file, ": ");
	}
	fprintf(err_file, "%s\n", strerror(code));
}
#endif

#ifndef	HAVE_ERR
__dead void
err(int eval, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	verrc(eval, errno, fmt, ap);
	va_end(ap);
}
#endif

#ifndef	HAVE_VERR
__dead void
verr(int eval, const char *fmt, va_list ap)
{
	verrc(eval, errno, fmt, ap);
}
#endif

#ifndef	HAVE_ERRX
__dead void
errx(int eval, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	verrx(eval, fmt, ap);
	va_end(ap);
}
#endif

#ifndef	HAVE_VERRX
__dead void
verrx(int eval, const char *fmt, va_list ap)
{
	if (err_file == 0)
		err_set_file((FILE *)0);
	fprintf(err_file, "%s: ", __progname);
	if (fmt != NULL)
		vfprintf(err_file, fmt, ap);
	fprintf(err_file, "\n");
	if (err_exit)
		err_exit(eval);
	exit(eval);
}
#endif

#ifndef	HAVE_WARN
void
warn(const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	vwarnc(errno, fmt, ap);
	va_end(ap);
}
#endif

#ifndef	HAVE_VWARN
void
vwarn(const char *fmt, va_list ap)
{
	vwarnc(errno, fmt, ap);
}
#endif

#ifndef	HAVE_WARNX
void
warnx(const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	vwarnx(fmt, ap);
	va_end(ap);
}
#endif

#ifndef	HAVE_VWARNX
void
vwarnx(const char *fmt, va_list ap)
{
	if (err_file == 0)
		err_set_file((FILE *)0);
	fprintf(err_file, "%s: ", __progname);
	if (fmt != NULL)
		vfprintf(err_file, fmt, ap);
	fprintf(err_file, "\n");
}
#endif
