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/*
* $LynxId: LYexit.c,v 1.38 2020/02/25 10:14:48 tom Exp $
*
* Copyright (c) 1994, University of Kansas, All Rights Reserved
* (most of this file was rewritten in 1996 and 2004).
*/
#include <HTUtils.h>
#include <LYexit.h>
#include <HTAlert.h>
#ifndef VMS
#include <LYGlobalDefs.h>
#include <LYUtils.h>
#include <LYSignal.h>
#include <LYMainLoop.h>
#endif /* !VMS */
#include <LYStrings.h>
#include <LYClean.h>
/*
* Flag for outofmem macro. - FM
*/
BOOL LYOutOfMemory = FALSE;
/*
* Stack of functions to call upon exit.
*/
static void (*callstack[ATEXITSIZE]) (void);
static int topOfStack = 0;
/*
* Capture "atexit()" calls for our own accounting.
*/
int LYatexit(void (*function) (void))
{
int result = 0;
if (topOfStack >= ATEXITSIZE) {
CTRACE((tfp, "(LY)atexit: Too many functions, ignoring one!\n"));
result = -1;
} else {
int n;
BOOLEAN found = FALSE;
for (n = 0; n < topOfStack; ++n) {
if (callstack[n] == function) {
found = TRUE;
break;
}
}
if (!found) {
callstack[topOfStack++] = function;
}
}
return result;
}
/*
* Purpose: Call the functions registered with LYatexit
* Arguments: void
* Return Value: void
* Remarks/Portability/Dependencies/Restrictions:
* Revision History:
* 06-15-94 created Lynx 2-3-1 Garrett Arch Blythe
*/
static void LYCompleteExit(void)
{
/*
* Just loop through registered functions. This is reentrant if more exits
* occur in the registered functions.
*/
while (--topOfStack >= 0) {
callstack[topOfStack] ();
}
}
/*
* Purpose: Terminates program, reports memory not freed.
* Arguments: status Exit code.
* Return Value: void
* Remarks/Portability/Dependencies/Restrictions:
* Function calls stdlib.h exit
* Revision History:
* 06-15-94 created Lynx 2-3-1 Garrett Arch Blythe
*/
void LYexit(int status)
{
#ifndef VMS /* On VMS, the VMSexit() handler does these. - FM */
#ifdef _WINDOWS
DeleteCriticalSection(&critSec_READ);
WSACleanup();
#endif
if (LYOutOfMemory == TRUE) {
/*
* Ignore further interrupts. - FM
*/
#ifndef NOSIGHUP
(void) signal(SIGHUP, SIG_IGN);
#endif /* NOSIGHUP */
(void) signal(SIGTERM, SIG_IGN);
(void) signal(SIGINT, SIG_IGN);
#ifndef __linux__
#ifdef SIGBUS
(void) signal(SIGBUS, SIG_IGN);
#endif /* SIGBUS */
#endif /* !__linux__ */
(void) signal(SIGSEGV, SIG_IGN);
(void) signal(SIGILL, SIG_IGN);
/*
* Flush all messages. - FM
*/
fflush(stderr);
fflush(stdout);
/*
* Deal with curses, if on, and clean up. - FM
*/
if (LYCursesON) {
LYSleepAlert();
}
cleanup_sig(0);
#ifndef __linux__
#ifdef SIGBUS
signal(SIGBUS, SIG_DFL);
#endif /* SIGBUS */
#endif /* !__linux__ */
signal(SIGSEGV, SIG_DFL);
signal(SIGILL, SIG_DFL);
}
#endif /* !VMS */
/*
* Close syslog before doing atexit-cleanup, since it may use a string
* that would be freed there.
*/
#ifdef SYSLOG_REQUESTED_URLS
LYCloselog();
#endif
/*
* Do functions registered with LYatexit. - GAB
*/
LYCompleteExit();
LYCloseCmdLogfile();
#ifdef exit
/* Make sure we use stdlib exit and not LYexit. - GAB
*/
#undef exit
#endif /* exit */
cleanup_files(); /* if someone starts with LYNXfoo: page */
#ifndef VMS /* On VMS, the VMSexit() handler does these. - FM */
fflush(stderr);
if (LYOutOfMemory == TRUE) {
LYOutOfMemory = FALSE;
printf("\r\n%s\r\n\r\n", MEMORY_EXHAUSTED_ABORT);
fflush(stdout);
}
LYCloseTracelog();
#endif /* !VMS */
show_alloc();
#if defined(NCURSES_VERSION) && defined(LY_FIND_LEAKS)
#if defined(HAVE_CURSES_EXIT)
curses_exit(status);
#elif defined(HAVE__NC_FREE_AND_EXIT)
_nc_free_and_exit(status);
#elif defined(HAVE__NC_FREEALL)
_nc_freeall();
#endif
#endif /* NCURSES_VERSION */
exit(status);
}
void outofmem(const char *fname,
const char *func)
{
fprintf(stderr, "\n\n\n%s %s: %s\n", fname, func, MEMORY_EXHAUSTED_ABORTING);
LYOutOfMemory = TRUE;
LYexit(-1);
}
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