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/*
* fitscleanup.c
*
* Signal-catching routines to clean-up temporary files.
*
*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
*
* This file part of: AstrOmatic FITS/LDAC library
*
* Copyright: (C) 1995-2010 Emmanuel Bertin -- IAP/CNRS/UPMC
*
* License: GNU General Public License
*
* AstrOmatic software 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 3 of the
* License, or (at your option) any later version.
* AstrOmatic software 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 AstrOmatic software.
* If not, see <http://www.gnu.org/licenses/>.
*
* Last modified: 09/10/2010
*
*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fitscat_defs.h"
#include "fitscat.h"
#define CLEANUP_NFILES 64
void (*exit_func)(void);
char **cleanup_filename;
int cleanup_nfiles;
/****** cleanup_files ********************************************************
PROTO void cleanup_files(void)
PURPOSE Remove temporary files on exit.
INPUT -.
OUTPUT -.
NOTES -.
AUTHOR E. Bertin (IAP)
VERSION 25/04/2002
***/
void cleanup_files(void)
{
char **filename;
int i;
filename = cleanup_filename;
for (i=cleanup_nfiles; i--;)
{
remove(*filename);
free(*(filename++));
}
if (cleanup_nfiles)
{
free(cleanup_filename);
cleanup_nfiles = 0;
}
return;
}
/****** add_cleanupfilename **************************************************
PROTO void add_cleanupfilename(char *filename)
PURPOSE Add a file name to the list of files to be cleaned up at exit.
INPUT pointer to filename char string.
OUTPUT -.
NOTES -.
AUTHOR E. Bertin (IAP)
VERSION 10/01/2003
***/
void add_cleanupfilename(char *filename)
{
if (!cleanup_nfiles)
{
QMALLOC(cleanup_filename, char *, CLEANUP_NFILES);
}
else if (!(cleanup_nfiles%CLEANUP_NFILES))
{
QREALLOC(cleanup_filename, char *, cleanup_nfiles+CLEANUP_NFILES);
}
QMALLOC(cleanup_filename[cleanup_nfiles], char, MAXCHARS);
strcpy(cleanup_filename[cleanup_nfiles++], filename);
return;
}
/****** remove_cleanupfilename ***********************************************
PROTO void remove_cleanupfilename(char *filename)
PURPOSE remove a file name from the list of files to be cleaned up at exit.
INPUT pointer to filename char string.
OUTPUT -.
NOTES -.
AUTHOR E. Bertin (IAP)
VERSION 16/07/2007
***/
void remove_cleanupfilename(char *filename)
{
char **filename2, **filename3;
int i, j;
if (!cleanup_nfiles)
return;
/* Search the cleanup filename list for a match */
filename2 = cleanup_filename;
for (i=cleanup_nfiles; i--;)
if (!strcmp(filename, *(filename2++)))
{
/* Match found: update the list and free memory is necessary*/
filename3 = filename2 - 1;
free(*filename3);
for (j=i; j--;)
*(filename3++) = *(filename2++);
if (!((--cleanup_nfiles)%CLEANUP_NFILES))
{
if (cleanup_nfiles)
{
QREALLOC(cleanup_filename, char *, cleanup_nfiles);
}
else
free(cleanup_filename);
}
break;
}
return;
}
/****** install_cleanup ******************************************************
PROTO void install_cleanup(void (*func)(void))
PURPOSE Install the signal-catching and exit routines to start cleanup_files().
INPUT A pointer to a function to be executed on exit.
OUTPUT -.
NOTES Catches everything except STOP and KILL signals.
AUTHOR E. Bertin (IAP)
VERSION 25/04/2002
***/
void install_cleanup(void (*func)(void))
{
void signal_function(int signum);
exit_func = func;
atexit(cleanup_files);
/* Catch CTRL-Cs */
signal(SIGINT, signal_function);
/* Catch bus errors */
#ifdef SIGBUS // TODO: what if it is an enum?
signal(SIGBUS, signal_function);
#endif
/* Catch segmentation faults */
signal(SIGSEGV, signal_function);
/* Catch floating exceptions */
signal(SIGFPE, signal_function);
return;
}
/****** signal_function ******************************************************
PROTO void signal_function(void)
PURPOSE The routine called when a signal is catched. Clean up temporary files
and execute a user-provided function.
INPUT signal number.
OUTPUT -.
NOTES .
AUTHOR E. Bertin (IAP)
VERSION 25/04/2002
***/
void signal_function(int signum)
{
cleanup_files();
if (exit_func)
exit_func();
switch(signum)
{
case SIGINT:
fprintf(stderr, "^C\n");
exit(-1);
#ifdef SIGBUS
case SIGBUS:
fprintf(stderr, "bus error\n");
exit(-1);
#endif
case SIGSEGV:
fprintf(stderr, "segmentation fault\n");
exit(-1);
case SIGFPE:
fprintf(stderr, "floating exception\n");
exit(-1);
default:
exit(-1);
}
return;
}
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