lrzip/util.c

/*
   Copyright (C) 2006-2011 Con Kolivas
   Copyright (C) 2008, 2011 Peter Hyman
   Copyright (C) 1998 Andrew Tridgell

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

/*
  Utilities used in rzip

  tridge, June 1996
  */

/*
 * Realloc removed
 * Functions added
 *    read_config()
 * Peter Hyman, December 2008
 */

#include "rzip.h"

static const char *infile = NULL;
static char delete_infile = 0;
static const char *outfile = NULL;
static char delete_outfile = 0;
static FILE *outputfile = NULL;

void register_infile(const char *name, char delete)
{
	infile = name;
	delete_infile = delete;
}

void register_outfile(const char *name, char delete)
{
	outfile = name;
	delete_outfile = delete;
}

void register_outputfile(FILE *f)
{
	outputfile = f;
}

static void unlink_files(void)
{
	/* Delete temporary files generated for testing or faking stdio */
	if (outfile && delete_outfile)
		unlink(outfile);

	if (infile && delete_infile)
		unlink(infile);
}

static void fatal_exit(void)
{
	unlink_files();
	fprintf(outputfile, "Fatal error - exiting\n");
	fflush(outputfile);
	exit(1);
}

/* Failure when there is likely to be a meaningful error in perror */
void fatal(const char *format, ...)
{
	va_list ap;

	if (format) {
		va_start(ap, format);
		vfprintf(stderr, format, ap);
		va_end(ap);
	}

	perror(NULL);
	fatal_exit();
}

void failure(const char *format, ...)
{
	va_list ap;

	if (format) {
		va_start(ap, format);
		vfprintf(stderr, format, ap);
		va_end(ap);
	}

	fatal_exit();
}

void sighandler()
{
	unlink_files();
	exit(0);
}

void round_to_page(i64 *size)
{
	*size -= *size % PAGE_SIZE;
	if (unlikely(!*size))
		*size = PAGE_SIZE;
}