version 1.9, 2000/07/21 09:25:27
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version 1.23, 2003/02/01 14:28:07
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/* signal handling |
/* signal handling |
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Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
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This file is part of Gforth. |
This file is part of Gforth. |
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You should have received a copy of the GNU General Public License |
You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
along with this program; if not, write to the Free Software |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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*/ |
*/ |
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#define _GNU_SOURCE |
#include "config.h" |
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#include "forth.h" |
#include <stdio.h> |
#include <stdio.h> |
#include <setjmp.h> |
#include <setjmp.h> |
#include <string.h> |
#include <string.h> |
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Line 31
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#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
#endif |
#endif |
/* #include <asm/signal.h> */ |
/* #include <asm/signal.h> */ |
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#include <sys/types.h> |
#include <signal.h> |
#include <signal.h> |
#include "config.h" |
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#include "forth.h" |
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#include "io.h" |
#include "io.h" |
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#ifndef HAVE_STACK_T |
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/* Darwin uses "struct sigaltstack" instead of "stack_t" */ |
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typedef struct sigaltstack stack_t; |
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#endif |
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#define DEFAULTCOLS 80 |
#define DEFAULTCOLS 80 |
#if defined(MSDOS) || defined (_WIN32) |
#if defined(MSDOS) || defined (_WIN32) |
Line 52 UCell rows=DEFAULTROWS;
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Line 55 UCell rows=DEFAULTROWS;
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/* systems that don't have SA_NODEFER hopefully don't block anyway */ |
/* systems that don't have SA_NODEFER hopefully don't block anyway */ |
#endif |
#endif |
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#ifndef SA_ONSTACK |
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#define SA_ONSTACK 0 |
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#endif |
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#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
void install_signal_handler(int sig, void (*handler)(int, siginfo_t *, void *)) |
void install_signal_handler(int sig, void (*handler)(int, siginfo_t *, void *)) |
/* installs three-argument signal handler for sig */ |
/* installs three-argument signal handler for sig */ |
Line 60 void install_signal_handler(int sig, voi
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Line 67 void install_signal_handler(int sig, voi
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action.sa_sigaction=handler; |
action.sa_sigaction=handler; |
sigemptyset(&action.sa_mask); |
sigemptyset(&action.sa_mask); |
action.sa_flags=SA_RESTART|SA_NODEFER|SA_SIGINFO; /* pass siginfo */ |
action.sa_flags=SA_RESTART|SA_NODEFER|SA_SIGINFO|SA_ONSTACK; /* pass siginfo */ |
sigaction(sig, &action, NULL); |
sigaction(sig, &action, NULL); |
} |
} |
#endif |
#endif |
Line 73 Sigfunc *bsd_signal(int signo, Sigfunc *
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Line 80 Sigfunc *bsd_signal(int signo, Sigfunc *
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act.sa_handler=func; |
act.sa_handler=func; |
sigemptyset(&act.sa_mask); |
sigemptyset(&act.sa_mask); |
act.sa_flags=SA_NODEFER; |
act.sa_flags=SA_NODEFER; /* SA_ONSTACK does not work for graceful_exit */ |
if (sigaction(signo,&act,&oact) < 0) |
if (sigaction(signo,&act,&oact) < 0) |
return SIG_ERR; |
return SIG_ERR; |
else |
else |
Line 114 static void fpe_handler(int sig, siginfo
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Line 121 static void fpe_handler(int sig, siginfo
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int code; |
int code; |
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switch(info->si_code) { |
switch(info->si_code) { |
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#ifdef FPE_INTDIV |
case FPE_INTDIV: code=-10; break; /* integer divide by zero */ |
case FPE_INTDIV: code=-10; break; /* integer divide by zero */ |
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#endif |
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#ifdef FPE_INTOVF |
case FPE_INTOVF: code=-11; break; /* integer overflow */ |
case FPE_INTOVF: code=-11; break; /* integer overflow */ |
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#endif |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
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#if 0 /* defined by Unix95, but unnecessary */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTSUB: /* subscript out of range */ |
case FPE_FLTSUB: /* subscript out of range */ |
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#endif |
default: code=-55; break; |
default: code=-55; break; |
} |
} |
longjmp(throw_jmp_buf,code); |
longjmp(throw_jmp_buf,code); |
Line 174 void get_winsize()
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Line 187 void get_winsize()
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{ |
{ |
#ifdef TIOCGWINSZ |
#ifdef TIOCGWINSZ |
struct winsize size; |
struct winsize size; |
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size.ws_row = size.ws_col = 0; |
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if (ioctl (1, TIOCGWINSZ, (char *) &size) >= 0) { |
if (ioctl (1, TIOCGWINSZ, (char *) &size) >= 0) { |
rows = size.ws_row; |
rows = size.ws_row; |
Line 183 void get_winsize()
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Line 197 void get_winsize()
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char *s; |
char *s; |
if ((s=getenv("LINES"))) { |
if ((s=getenv("LINES"))) { |
rows=atoi(s); |
rows=atoi(s); |
if (rows==0) |
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rows=DEFAULTROWS; |
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} |
} |
if ((s=getenv("COLUMNS"))) { |
if ((s=getenv("COLUMNS"))) { |
rows=atoi(s); |
rows=atoi(s); |
if (rows==0) |
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cols=DEFAULTCOLS; |
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} |
} |
#endif |
#endif |
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if (rows==0) |
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rows=DEFAULTROWS; |
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if (rows==0) |
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cols=DEFAULTCOLS; |
} |
} |
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#ifdef SIGWINCH |
#ifdef SIGWINCH |
Line 355 void install_signal_handlers(void)
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Line 369 void install_signal_handlers(void)
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}; |
}; |
int i; |
int i; |
void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw; |
void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw; |
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#ifdef SIGSTKSZ |
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stack_t sigstack; |
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int sas_retval=-1; |
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sigstack.ss_size=SIGSTKSZ; |
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/* Actually the stack should only be ss_size large, and according to |
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SUSv2 ss_sp should point to the start of the stack, but |
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unfortunately Irix 6.5 (at least) expects ss_sp to point to the |
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end, so we work around this issue by accomodating everyone. */ |
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if ((sigstack.ss_sp = my_alloc(sigstack.ss_size*2)) != NULL) { |
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sigstack.ss_sp += sigstack.ss_size; |
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sigstack.ss_flags=0; |
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sas_retval=sigaltstack(&sigstack,(stack_t *)0); |
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} |
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if (debug) |
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fprintf(stderr,"sigaltstack: %s\n",strerror(sas_retval)); |
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#endif |
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#define DIM(X) (sizeof (X) / sizeof *(X)) |
#define DIM(X) (sizeof (X) / sizeof *(X)) |
/* |
/* |
Line 366 void install_signal_handlers(void)
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Line 397 void install_signal_handlers(void)
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for (i = 0; i < DIM (sigs_to_quit); i++) |
for (i = 0; i < DIM (sigs_to_quit); i++) |
bsd_signal(sigs_to_quit [i], graceful_exit); |
bsd_signal(sigs_to_quit [i], graceful_exit); |
#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
install_signal_handler(SIGFPE, fpe_handler); |
if (!die_on_signal) { |
install_signal_handler(SIGSEGV, segv_handler); |
install_signal_handler(SIGFPE, fpe_handler); |
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install_signal_handler(SIGSEGV, segv_handler); |
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} |
#endif |
#endif |
#ifdef SIGCONT |
#ifdef SIGCONT |
bsd_signal(SIGCONT, termprep); |
bsd_signal(SIGCONT, termprep); |