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EnigmA Amiga Run 1995 October
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EnigmA AMIGA RUN 01 (1995)(G.R. Edizioni)(IT)[!][issue 1995-10][Aminet 7].iso
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Aminet
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dev
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gcc
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ixemul_src.lha
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ixemul-41.0
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library
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ix_startup.c
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1995-05-28
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/*
* This file is part of ixemul.library for the Amiga.
* Copyright (C) 1991, 1992 Markus M. Wild
* Portions Copyright (C) 1994 Rafael W. Luebbert
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: ix_startup.c,v 1.5 1994/06/19 15:13:22 rluebbert Exp $
*
* $Log: ix_startup.c,v $
* Revision 1.5 1994/06/19 15:13:22 rluebbert
* *** empty log message ***
*
* Revision 1.3 1992/08/09 20:55:51 amiga
* import sysbase
*
* Revision 1.2 1992/07/04 19:18:21 mwild
* remove SIGWINCH handler before returning
*
* Revision 1.1 1992/05/14 19:55:40 mwild
* Initial revision
*
*/
#define KERNEL
#include "ixemul.h"
#include "kprintf.h"
#define exit_buf u.u_jmp_buf
extern struct ExecBase *SysBase;
/* this just jumps right back into ix_startup() */
/*
* Note: I kept the partition into startup and _main(), although in this
* case, both functions could be done in one function, since this is
* a library, and the user can't override _main anyway but globally...
*/
int
ix_startup (char *aline, int alen,
int expand, char *wb_default_window, u_int main, int *real_errno)
{
struct Process *me = (struct Process *) SysBase->ThisTask;
int exit_val;
struct WBStartup *wb_msg;
int fd;
/*
* The following code to reset the fpu might not be necessary, BUT since
* a CLI shell doesn't spawn a new process when executing a command - it
* insteads calls the command like a subroutine - it depends on the Shell
* whether the fpu is setup correctly. And I don't like to depend on any
* thing ;-)
*/
if(gotanfpu())
resetfpu();
/* first deal with WB messages, since those HAVE to be answered properly,
* even if we should fail later (memory, whatever..) */
if (! me->pr_CLI)
{
/* we have been started by Workbench. Get the StartupMsg */
WaitPort (& me->pr_MsgPort);
wb_msg = (struct WBStartup *) GetMsg (& me->pr_MsgPort);
/* further processing in _main () */
}
else
{
/* for usage by sys_exit() for example */
KPRINTF (("CLI command line '%s'\n", aline));
u.u_argline = aline;
u.u_arglinelen = alen;
}
u.u_expand_cmd_line = expand;
if (real_errno) u.u_errno = real_errno;
KPRINTF (("&errno = %lx\n", real_errno));
exit_val = setjmp (exit_buf);
if (! exit_val)
{
/* from now on it's safe to allow signals */
syscall (SYS_sigsetmask, 0);
/* the first time thru call the program */
KPRINTF (("calling __main()\n"));
exit_val = me->pr_CLI ? syscall (SYS__main, aline, alen, main)
: syscall (SYS__main, wb_msg, wb_default_window, main);
KPRINTF (("exit_val = %ld\n", exit_val));
}
else
/* in this case we came from a longjmp-call */
{
exit_val --;
}
ix_remove_sigwinch ();
/* had to move the closing of files out of ix_close(), as close() may
actually wait for the last packet to arrive, and inside ix_close() we're
inside Forbid, and may thus never wait! */
/* close all files */
for (fd = 0; fd < NOFILE; fd++)
if (u.u_ofile[fd]) syscall (SYS_close, fd);
/* if at all possible, free memory before entering Forbid ! (Semaphore
problems..) */
all_free ();
/* if started from workbench, Forbid(), since on reply WB will deallocate
* our task... */
if (! me->pr_CLI)
{
Forbid ();
ReplyMsg ((struct Message *) wb_msg);
}
return exit_val;
}
void
_exit (int retcode)
{
longjmp (exit_buf, retcode + 1);
}