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/* $Header$ */
/*
* Copyright © 1988-2004 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
/*
* main.c
*
* main routine for nick
*/
#include "nickle.h"
#include "gram.h"
#include <setjmp.h>
#define __USE_UNIX98 /* Get sigignore() and sigrelse()
prototype for Linux */
#include <signal.h>
#include <stdio.h>
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
int stdin_interactive;
static void
setArgv (int argc, char **argv)
{
ENTER ();
Value args;
int i;
args = NewArray (True, True, typePrim[rep_string], 1, &argc);
for (i = 0; i < argc; i++)
ArrayValueSet (&args->array, i, NewStrString (argv[i]));
setVar (GlobalNamespace, "argv", args,
NewTypeArray (typePrim[rep_string],
NewExprTree (COMMA, 0, 0), False));
EXIT ();
}
static Bool
try_nicklestart (void)
{
char *nicklestart;
if ((nicklestart = getenv ("NICKLESTART")) == 0)
nicklestart = NICKLELIBDIR "/builtin.5c";
return LexFile (nicklestart, True, False);
}
RETSIGTYPE intr(int), ferr(int);
RETSIGTYPE stop (int), die (int), segv (int);
static void
ignoreSignal(int sig) {
catchSignal (sig, SIG_IGN);
}
static void
releaseSignal(int sig) {
catchSignal (sig, SIG_DFL);
}
/*ARGSUSED*/
int
main (int argc, char **argv)
{
#if HAVE_GETRLIMIT && HAVE_SETRLIMIT
/*
* Allow stack to grow as large as possible to avoid
* crashes during recursive datastructure marking in the
* garbage collector
*/
struct rlimit lim;
if (getrlimit (RLIMIT_STACK, &lim) == 0)
{
lim.rlim_cur = lim.rlim_max;
(void) setrlimit (RLIMIT_STACK, &lim);
}
#endif
(void) catchSignal (SIGHUP, die);
(void) catchSignal (SIGINT, intr);
(void) catchSignal (SIGQUIT, die);
(void) catchSignal (SIGILL, die);
(void) catchSignal (SIGABRT, die);
(void) catchSignal (SIGSEGV, segv);
(void) ignoreSignal (SIGPIPE);
(void) catchSignal (SIGTERM, die);
(void) catchSignal (SIGTSTP, stop);
(void) catchSignal (SIGTTIN, stop);
(void) catchSignal (SIGTTOU, stop);
stdin_interactive = isatty(0);
init ();
setArgv (argc - 1, argv + 1);
if (!try_nicklestart()) {
fprintf(stderr, "nickle: NICKLESTART environment var points at bad code\n");
exit(1);
}
(void) yyparse ();
/* Wait for any running threads to execute */
ThreadsRun (0, 0);
IoFini ();
FileFini ();
return lastThreadError;
}
void
init (void)
{
MemInitialize ();
TypeInit ();
ValueInit ();
IoInit ();
LexInit ();
NamespaceInit ();
SymbolInit ();
BuiltinInit ();
ThreadInit ();
TimerInit ();
}
void
catchSignal (int sig, RETSIGTYPE (*func) (int sig))
{
#ifdef HAVE_SIGACTION
struct sigaction sa;
memset (&sa, '\0', sizeof (struct sigaction));
sa.sa_handler = func;
sa.sa_flags = SA_RESTART;
sigaction (sig, &sa, 0);
#else
signal (sig, func);
#endif
}
void
resetSignal (int sig, RETSIGTYPE (*func) (int sig))
{
#ifndef HAVE_SIGACTION
signal (sig, func);
#endif
}
volatile Bool signalInterrupt;
RETSIGTYPE
intr (int sig)
{
resetSignal (SIGINT, intr);
SetSignalInterrupt ();
}
RETSIGTYPE
stop (int sig)
{
sigset_t set, oset;
sigfillset (&set);
sigprocmask (SIG_SETMASK, &set, &oset);
IoStop ();
releaseSignal (sig);
sigfillset (&set);
sigdelset (&set, sig);
sigprocmask (SIG_SETMASK, &set, &set);
kill (getpid(), sig);
sigprocmask (SIG_SETMASK, &oset, &set);
IoStart ();
catchSignal (sig, stop);
}
RETSIGTYPE
die (int sig)
{
IoStop ();
_exit (sig);
}
RETSIGTYPE
segv (int sig)
{
IoStop ();
releaseSignal (SIGSEGV);
/* return and reexecute the fatal instruction */
}
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