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/*
------------------------------------------------------------------------------
A license is hereby granted to reproduce this software source code and
to create executable versions from this source code for personal,
non-commercial use. The copyright notice included with the software
must be maintained in all copies produced.
THIS PROGRAM IS PROVIDED "AS IS". THE AUTHOR PROVIDES NO WARRANTIES
WHATSOEVER, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF
MERCHANTABILITY, TITLE, OR FITNESS FOR ANY PARTICULAR PURPOSE. THE
AUTHOR DOES NOT WARRANT THAT USE OF THIS PROGRAM DOES NOT INFRINGE THE
INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY IN ANY COUNTRY.
Copyright (c) 1995, John Conover, All Rights Reserved.
Comments and/or bug reports should be addressed to:
john@johncon.com (John Conover)
------------------------------------------------------------------------------
relclose.c, relclose module for rel
void relclose (int err);
close program operations-this module is used primarily for
handling SIGINT, although use as a general shutdown procedure is
permitted
all elements should be returned to their initialized values prior
to termination of this module in such a manner that the program
could be restarted at the conclusion of execution of this module,
indefinitely many times
this module should not be used as a general way of closing files,
deallocating memory, or printing error messages-these should be
handled by the appropriate modules in the program; the sole
exception is for interrupt vectoring
the algorithm is as follows:
ignore signals of all kinds
if the error number was a system interrupt
print the error message for the interrupt number
if any file or directory is open, close it
if any memory is allocated, deallocate it
restore signaling to its original state when the program was
invoked
exit with the error argument (if any)
Usage is a call with the error, for example
int retval;
relclose (retval);
The argument, err, represents the error code that the program will
terminate with-zero means no error
On any error encountered by this module, print the error, immediately;
there is no return from this module
There is no test case for this module.
$Revision: 1.0 $
$Date: 1995/04/22 05:13:18 $
$Id: relclose.c,v 1.0 1995/04/22 05:13:18 john Exp $
$Log: relclose.c,v $
* Revision 1.0 1995/04/22 05:13:18 john
* Initial revision
*
*/
#include "rel.h"
#ifndef LINT /* include rcsid only if not running lint */
static char rcsid[] = "$Id: relclose.c,v 1.0 1995/04/22 05:13:18 john Exp $"; /* module version */
static char rcsid_h[] = RELCLOSE_H_ID; /* module include version */
#endif
#ifdef __STDC__
void relclose (int err)
#else
void relclose (err)
int err;
#endif
{
if (signal (SIGINT, SIG_IGN) == SIG_ERR) /* ignore intrrupts during this routine */
{
message (URIGN_ERR, (char *) 0); /* couldn't install it, print the error and continue */
}
if (err <= max_interrupts) /* error a signal interrupt error? */
{
message (err, (char *) 0); /* yes, print the error */
int_searchfile (); /* yes, check if the searchfile module is shutdown, if not shut it down */
int_searchpath (); /* check if the searchpath module is shutdown, if not shut it down */
}
memdealloc (); /* deallocate memory */
if (signal (SIGINT, SIG_DFL) == SIG_ERR) /* restore default interrupts */
{
message (URRSG_ERR, (char *) 0); /* couldn't install it, print the error and continue */
}
exit (err); /* exit to the OS with any error */
}
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