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_main.c
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C/C++ Source or Header
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1990-12-05
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7KB
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315 lines
/* Created 11/08/87 by -=+SDB+=- from file _main.c provided by Manx */
/* Copyright (C) 1987 by Scott Ballantyne */
/* May be freely used by ARP users/supporters */
/* Memory is allocated for the MANX device buffers, etc., but the
* ARP tracking functions are used.
* tweeked for v39
* further tweeked to handle v1.4 workbench startup
*/
extern long _savsp, _stkbase;
extern int errno, Enable_Abort;
extern int _argc;
extern char **_argv;
extern struct WBStartup *WBenchMsg;
extern struct _dev *_devtab;
extern short _numdev;
extern struct ArpBase *ArpBase;
extern void *IntuitionBase, *GfxBase, *DOSBase;
extern struct ExecBase *SysBase;
/* !!! alot of things here depend on receiving WBenchMsg before opening arp.library */
#ifdef DETACH
static long _alen = 0;
#ifdef PARENT
struct Process *_parent_proc = NULL;
#endif /* PARENT */
#endif /* DETACH */
struct WBStartup * GetMsg(struct MsgPort *);
void * OpenLibrary(char *,LONG);
_main(alen, aptr)
long alen;
char *aptr;
{
register struct Process *pp;
pp = (struct Process *)SysBase -> ThisTask;
#ifdef DETACH
/* !!! alen is here because pr_CLI is NULL for bg task, but _alen (hopefully) isn't */
if(!pp -> pr_CLI && !_alen)
#else
if(!pp -> pr_CLI)
#endif
{
WaitPort(&pp -> pr_MsgPort);
WBenchMsg = (struct WBStartup *)GetMsg(&pp -> pr_MsgPort);
}
if(!(ArpBase = (struct ArpBase *)OpenLibrary (ArpName,ArpVersion)))
{
complain();
Forbid();
if(WBenchMsg)
ReplyMsg((struct Message *)WBenchMsg);
return(RETURN_FAIL);
}
if(!DOSBase)
DOSBase = ArpBase -> DosBase;
GfxBase = ArpBase -> GfxBase;
IntuitionBase = ArpBase -> IntuiBase;
#ifdef DETACH
#ifdef STICKY
if(Strcmp(&aptr[0],"STICKY"))
#endif /* STICKY */
{
void do_detach();
if(!WBenchMsg)
do_detach(&alen, &aptr);
}
#ifdef STICKY
}
#endif /* STICKY */
#endif /* DETACH */
if(!(_devtab = ArpAlloc(_numdev * sizeof(struct _dev))))
{
Alert(AG_NoMemory,NULL);
ArpExit(RETURN_FAIL,ERROR_NO_FREE_STORE);
}
_devtab[0] . mode = O_RDONLY;
_devtab[1] . mode = _devtab[2] . mode = O_WRONLY;
_stkbase = _savsp - *((long *)_savsp + 1) + 8;
/* If compiled using the stack overflow checking function,
* the 'MANX' ID helps _stkchk() to determine if the stack
* upper bound has been overridden.
*/
*(long *)_stkbase = 'MANX';
if(!WBenchMsg)
{
#ifdef STICKY
if(!Strcmp(&aptr[0],"STICKY"))
{
_devtab[0].mode |= O_STDIO; /* shouldn't close if STICKY */
_devtab[1].mode |= O_STDIO;
alen -= 6; /* remove STICKY command line argument */
aptr += 6;
}
#endif /* STICKY */
_cli_parse(pp, alen, aptr);
Enable_Abort = 1;
#ifndef DETACH
_devtab[0] . mode |= O_STDIO; /* shouldn't close if CLI */
_devtab[1] . mode |= O_STDIO;
#endif /* DETACH */
/* !!! wb 1.4 tweek */
_devtab[0] . fd = Input();
if(_devtab[1] . fd = Output())
_devtab[2] . fd = Open("*", MODE_OLDFILE);
/* !!! wb 1.4 tweek */
}
else
{
/* !!! wb 1.4 tweek */
_devtab[0] . mode |= O_STDIO; /* shouldn't close if WB opened something for us */
_devtab[1] . mode |= O_STDIO;
_devtab[2] . mode |= O_STDIO;
/* !!! wb 1.4 tweek */
if(WBenchMsg -> sm_ArgList)
CurrentDir((BPTR)WBenchMsg -> sm_ArgList -> wa_Lock);
_wb_parse(pp, WBenchMsg);
_argv = (char **)WBenchMsg;
/* !!! wb 1.4 tweek */
_devtab[0] . fd = Input();
_devtab[1] . fd = _devtab[2] . fd = Output();
/* !!! wb 1.4 tweek */
}
exit(main(_argc, _argv)); /* Need to also close files, etc. */
}
static
complain()
{
BPTR output;
static char complaint1[] = "You need arp.library V39+";
static char complaint2[] = "\n";
static struct IntuiText comptext = { AUTOFRONTPEN, 0, JAM1, 30, 15, NULL, (void *)complaint1 };
static struct IntuiText oktext = { AUTOFRONTPEN, AUTOBACKPEN, AUTODRAWMODE, AUTOLEFTEDGE, AUTOTOPEDGE, NULL, (void *)"Ok" };
struct Process *pp;
pp = (struct Process *)SysBase -> ThisTask;
if(pp -> pr_CLI && (DOSBase = (void *)OpenLibrary ("dos.library",33L)) && (output = Output()))
{
Write(output, complaint1, sizeof(complaint1-1));
Write(output, complaint2, sizeof(complaint2-1));
}
else
{
if(IntuitionBase = (void *)OpenLibrary ("intuition.library",33L))
{
AutoRequest (NULL,&comptext,NULL,&oktext,0L,0L,320L,72L);
CloseLibrary ((struct Library *)IntuitionBase);
}
else
Alert(AG_OpenLib | AO_ArpLib, 0L);
}
if(DOSBase)
{
CloseLibrary ((struct Library *)DOSBase);
DOSBase = NULL;
}
}
#ifdef DETACH
extern long _stack, _priority, _BackGroundIO;
extern char *_procname;
BPTR _Backstdout = 0;
extern BPTR _detach_curdir;
extern char *_detach_name;
static char *_aptr = 0;
static void
do_detach(long *alen,char **aptr)
{
struct Process *pp = (struct Process *)SysBase -> ThisTask;
if(pp -> pr_CLI) /* first time through!! */
{
register char *cp;
register struct CommandLineInterface *cli;
#ifdef PARENT
_parent_proc = pp;
#endif /* PARENT */
CurrentDir(_detach_curdir = CurrentDir(NULL));
_detach_curdir = DupLock(_detach_curdir);
cli = (struct CommandLineInterface *)BADDR(pp -> pr_CLI);
if(!_stack)
_stack = cli -> cli_DefaultStack * 4;
if(_BackGroundIO)
_Backstdout = (BPTR)Open("*", MODE_OLDFILE);
_alen = *alen;
if(_aptr = DosAllocMem(_alen))
{
CopyMem(*aptr, _aptr, _alen);
cp = (char *)BADDR(cli -> cli_CommandName);
if(_detach_name = DosAllocMem(cp[0] + 1))
{
CopyMem(cp,_detach_name,cp[0] + 1);
if(CreateProc(_procname,_priority,cli -> cli_Module,_stack))
{
cli -> cli_Module = NULL;
ArpExit(0,0);
}
DosFreeMem(_detach_name);
}
DosFreeMem(_aptr);
}
ArpExit(20,ERROR_NO_FREE_STORE);
}
/* !!! why is this strcmp() here???
*
* Olsen says: This strcmp succeeds if the detach
* startup code has successfully created the background
* process with the name given in '_procname'.
*
* There is a nasty pitfall; say '_procname = "foo";'
* the resulting program is called 'foo', too, and is
* called from Workbench. What happens? Bang!
* pp->pr_CLI is zero and the strcmp succeeds.
* If 'foo' hasn't crashed yet it will crash on exit.
*
* Note that the Arp _main() routine fixes this bug
* by taking a look on WBenchMsg before calling do_detach.
*/
else
{
/* second time */
if(!strcmp(pp -> pr_Task . tc_Node . ln_Name, _procname))
{
register long *lp;
register struct DefaultTracker *tr;
struct DefaultTracker *GetTracker(LONG);
if(tr = GetTracker(TRAK_SEGLIST))
{
lp = (long *)BADDR(pp -> pr_SegList);
tr -> dt_Object . dt_Resource = (CPTR)lp[3];
}
if(tr = GetTracker(TRAK_DAMEM))
tr -> dt_Object . dt_Resource = (CPTR)_aptr;
if(tr = GetTracker(TRAK_DAMEM))
tr -> dt_Object . dt_Resource = (CPTR)_detach_name;
if(tr = GetTracker(TRAK_LOCK))
tr -> dt_Object . dt_Resource = (CPTR)_detach_curdir;
CurrentDir(_detach_curdir);
pp -> pr_COS = _Backstdout;
*alen = _alen;
*aptr = _aptr;
}
}
}
#endif /* DETACH */