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/* C K U S I G -- Kermit signal handling for Unix and OS/2 systems */
/*
Author: Jeffrey Altman (jaltman@columbia.edu),
Columbia University Academic Information Systems, New York City.
Copyright (C) 1985, 1998, Trustees of Columbia University in the City of New
York. The C-Kermit software may not be, in whole or in part, licensed or
sold for profit as a software product itself, nor may it be included in or
distributed with commercial products or otherwise distributed by commercial
concerns to their clients or customers without written permission of the
Office of Kermit Development and Distribution, Columbia University. This
copyright notice must not be removed, altered, or obscured.
*/
#include "ckcsym.h"
#include "ckcasc.h" /* ASCII character symbols */
#include "ckcdeb.h" /* Debug & other symbols */
#include "ckcker.h" /* Kermit symbols */
#include "ckcnet.h" /* Network symbols */
#ifndef NOSPL
#include "ckuusr.h"
#endif /* NOSPL */
#include <signal.h>
#ifdef NT
#include <setjmpex.h>
#include <excpt.h>
#else /* NT */
#include <setjmp.h>
#endif /* NT */
#include "ckcsig.h"
#ifdef NOCCTRAP
extern ckjmpbuf cmjbuf;
#endif /* NOCCTRAP */
#ifdef MAC
#define signal msignal
#define SIGTYP long
#define alarm malarm
#define SIG_IGN 0
#define SIGALRM 1
#define SIGINT 2
SIGTYP (*msignal(int type, SIGTYP (*func)(int)))(int);
#endif /* MAC */
#ifdef STRATUS
/* We know these are set here. MUST unset them before the definitions. */
#define signal vsignal
#define alarm valarm
SIGTYP (*vsignal(int type, SIGTYP (*func)(int)))(int);
int valarm(int interval);
#endif /* STRATUS */
#ifdef AMIGA
#define signal asignal
#define alarm aarlarm
#define SIGALRM (_NUMSIG+1)
#define SIGTYP void
SIGTYP (*asignal(int type, SIGTYP (*func)(int)))(int);
unsigned aalarm(unsigned);
#endif /* AMIGA */
#ifdef NTASM
DWORD
ckgetIP(void)
{
__asm
{
mov eax, dword ptr [esp+0x10]
jmp ckgetIP + 0x18
}
return 1;
}
#endif /* NTASM */
#ifdef NT
DWORD
exception_filter( void )
{
GetExceptionInformation ;
return( EXCEPTION_EXECUTE_HANDLER ) ;
}
void
crash( void )
{
int x = 0, y = 0 ;
x / y ;
}
#endif /* NT */
#ifndef NOCCTRAP
int
#ifdef CK_ANSIC
cc_execute( ckjptr(sj_buf), ck_sigfunc dofunc, ck_sigfunc failfunc )
#else
cc_execute( sj_buf, dofunc, failfunc)
ckjptr(sj_buf);
ck_sigfunc dofunc;
ck_sigfunc failfunc;
#endif /* CK_ANSIC */
/* cc_execute */ {
int rc = 0 ;
#ifdef NTASM
DWORD Eip, Esp ;
isinterrupted = 0;
sj_buf->retcode = 0 ;
sj_buf->Id = GetCurrentThreadId() ;
memset( &sj_buf->context, 0, sizeof(CONTEXT) );
sj_buf->context.ContextFlags = CONTEXT_FULL ;
#ifndef COMMENT
GetThreadContext(GetCurrentThread(), &(sj_buf->context) ) ;
__asm
{
mov ecx,dword ptr [sj_buf]
mov dword ptr [ecx+0xc4],esp
}
sj_buf->context.EFlags = 530 ;
sj_buf->context.Eip = ckgetIP()+0x0C ;
#else /* COMMENT */
__asm
{
mov eax, dword ptr [sj_buf]
push eax
mov eax, 0xfffffffe
push eax
mov eax, 0x00000039
mov edx,esp
int 0x2e
pop eax
pop eax
}
#endif /* COMMENT */
#endif /* NTASM */
if (
#ifdef NTASM
isinterrupted
#else
cksetjmp(ckjdref(sj_buf))
#endif /* NTASM */
) {
#ifdef NTASM
__asm
{
mov esp, ESPToRestore
}
isinterrupted = 0 ;
#endif /* NTASM */
(*failfunc)(NULL) ;
#ifdef NTASM
rc = sj_buf->retcode ;
#else /* NTASM */
rc = -1 ;
#endif /* NTASM */
} else {
#ifdef NT
__try {
(*dofunc)(NULL) ;
}
__except( exception_filter() )
{
debug(F100,"cc_execute __except","",0);
debug(F111,"exception_filter","_exception_code", GetExceptionCode() ) ;
longjmp(ckjdref(sj_buf),SIGINT) ;
}
#else /* NT */
(*dofunc)(NULL) ;
#endif /* NT */
}
return rc ;
}
#endif /* NOCCTRAP */
int
#ifdef CK_ANSIC /* ANSIC C declaration... */
alrm_execute(ckjptr(sj_buf),
int timo,
ck_sighand handler,
ck_sigfunc dofunc,
ck_sigfunc failfunc
)
#else /* Not ANSIC C ... */
alrm_execute(sj_buf,
timo,
handler,
dofunc,
failfunc
)
ckjptr(sj_buf);
int timo;
ck_sighand handler;
ck_sigfunc dofunc;
ck_sigfunc failfunc;
#endif /* CK_ANSIC */
/* alrm_execute */ {
int rc = 0;
int savalrm = 0;
_PROTOTYP(SIGTYP (*savhandler), (int));
savalrm = alarm(timo);
savhandler = signal(SIGALRM, handler);
#ifdef NTASM
sj_buf->retcode = 0 ;
sj_buf->Id = GetCurrentThreadId();
memset(&sj_buf->context, 0, sizeof(CONTEXT));
sj_buf->context.ContextFlags = CONTEXT_FULL;
#ifndef COMMENT
GetThreadContext(GetCurrentThread(), &(sj_buf->context));
#else
__asm
{
mov eax, dword ptr [sj_buf]
push eax
mov eax, 0xfffffffe
push eax
mov eax, 0x00000039
mov edx,esp
int 0x2e
pop eax
pop eax
}
#endif
isinterrupted = 0;
#endif /* NTASM */
if (
#ifdef NTASM
sj_buf->retcode
#else
cksetjmp(ckjdref(sj_buf))
#endif /* NTASM */
) {
(*failfunc)(NULL) ;
rc = -1 ;
} else {
#ifdef NT
__try {
(*dofunc)(NULL) ;
}
__except( exception_filter() )
{
debug(F100,"alrm_execute __except","",0);
debug(F111,"exception_filter","_exception_code", GetExceptionCode() ) ;
longjmp(ckjdref(sj_buf),SIGINT) ;
}
#else /* NT */
(*dofunc)(NULL) ;
#endif /* NT */
}
alarm(savalrm) ;
if ( savhandler )
signal( SIGALRM, savhandler ) ;
return rc ;
}
int
#ifdef CK_ANSIC /* ANSIC C declaration... */
cc_alrm_execute(ckjptr(sj_buf),
int timo,
ck_sighand handler,
ck_sigfunc dofunc,
ck_sigfunc failfunc
)
#else /* Not ANSIC C ... */
cc_alrm_execute(sj_buf,
timo,
handler,
dofunc,
failfunc
)
ckjptr(sj_buf);
int timo;
ck_sighand handler;
ck_sigfunc dofunc;
ck_sigfunc failfunc;
#endif /* CK_ANSIC */
/* cc_alrm_execute */ {
int rc = 0;
int savalrm = 0;
_PROTOTYP(SIGTYP (*savhandler), (int));
savalrm = alarm(timo);
savhandler = signal( SIGALRM, handler );
#ifdef NTASM
sj_buf->retcode = 0 ;
sj_buf->Id = GetCurrentThreadId() ;
memset( &sj_buf->context, 0, sizeof(CONTEXT) );
sj_buf->context.ContextFlags = CONTEXT_FULL ;
#ifndef COMMENT
GetThreadContext( GetCurrentThread(), &(sj_buf->context) ) ;
#else
__asm
{
mov eax, dword ptr [sj_buf]
push eax
mov eax, 0xfffffffe
push eax
mov eax, 0x00000039
mov edx,esp
int 0x2e
pop eax
pop eax
}
#endif
isinterrupted = 0;
#endif /* NTASM */
if (
#ifdef NTASM
sj_buf->retcode
#else
cksetjmp(ckjdref(sj_buf))
#endif /* NTASM */
) {
(*failfunc)(NULL) ;
rc = -1 ;
} else {
#ifdef NT
__try {
(*dofunc)(NULL) ;
}
__except( exception_filter() )
{
debug(F100,"cc_alrm_execute __except","",0);
debug(F111,"exception_filter","_exception_code", GetExceptionCode() ) ;
longjmp(ckjdref(sj_buf),SIGINT) ;
}
#else /* NT */
(*dofunc)(NULL) ;
#endif /* NT */
}
alarm(savalrm) ;
if ( savhandler )
signal( SIGALRM, savhandler ) ;
return rc ;
}
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