From: paag AT tid DOT es ("Pedro A. Aranda =?iso-8859-1?Q?Guti=E9rrez?=")
Subject: Problem using bash a the default shell from within a non cygwin32 program & crashes with ^C
14 Dec 1996 08:39:28 -0800
Sender: daemon AT cygnus DOT com
Approved: cygnus DOT gnu-win32 AT cygnus DOT com
Distribution: cygnus
Message-ID: <32B2CFC8.52B9.cygnus.gnu-win32@tid.es>
References: <199612140537 DOT IAA10146 AT buggy DOT prospect DOT com DOT ru>
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Original-To: gnu-win32 AT cygnus DOT com
Original-Sender: owner-gnu-win32 AT cygnus DOT com

Hi, everybody!

Is this a bug, or just a 'negative feature' ???

I'm trying to avoid having multiple copies of
bash under different names in my system. The first
way I thought of writing simple 100% WIN32 program
I had already used in a port of a 'make' utility
I did some time ago. I just substitute argv[0] by
'bash' and take the rest of arguments into a
new command line and use the Win32 API to execute
the command. Here's the source:

----------- sh.c -----------------------------
#include <windows.h>
#include <malloc.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc,char **argv)
{
  int                 bResult;
  STARTUPINFO         si;
  PROCESS_INFORMATION pi;
  DWORD               exitcode;
  char*               cmd;
  int                 cmdlen;
  int                 arg;
  =

  cmd =3D malloc(5); strcpy(cmd,"bash");
  cmdlen =3D 5;
  for(arg=3D1;arg < argc;arg ++)
    {
      char *tmp;

      cmdlen +=3D strlen(argv[arg]) + 1;
      if ((tmp =3D malloc(cmdlen)) =3D=3D NULL)
	return -1;
      sprintf(tmp,"%s %s",cmd,argv[arg]);
      free(cmd);
      cmd =3D tmp;
    }
  =

  exitcode =3D 0;
  memset(&si,0,sizeof(STARTUPINFO));
  si.cb =3D sizeof(STARTUPINFO);
  =

  bResult =3D CreateProcess(NULL,
			  cmd,
			  NULL,NULL, /* No security */
			  TRUE,	     /* Inherits handles */
			  0,	     /* Runs normally  */
			  NULL,NULL, /* Inherits env & cwd */
			  &si,&pi);
      =

  if (bResult)
    {
      while (bResult =3D GetExitCodeProcess(pi.hProcess,&exitcode))
	if (exitcode !=3D STILL_ACTIVE)
	  break;
      =

      if (bResult =3D=3D FALSE) {
	printf("GetExitCodeProcess() returned FALSE\n");
	return -1;
      }
    }
  else
    {
      exitcode =3D -1;
    }
  =

  return (int)exitcode;
}
----------------------------------------------

I saw, that something wasn't quite right, so I
wrote this absolutely studip test program

---------------- kk.c ------------------------
#include <stdio.h>

int main(int argc, char **argv)
{
  int arg;
  =

  printf("kk: argc =3D %d\n",argc);
  for (arg =3D 0;arg < argc;arg++)
    printf("kk: argv[%d] =3D '%s'\n",arg,argv[arg]);
    =

}

----------------------------------------------

And the results speak for themselves :

----------------------------------------------

sh -c ./kk hi, how are you
kk: argc =3D 1
kk: argv[0] =3D './kk'

----------------------------------------------

Now, IMHO, the problem is somehow in 'bash'.
Any clues? =


Ahh, BTW

If I try to abort a make with a Ctrl-c =

from within a DOS box in Win95 running COMMAND.COM,
I get this wonderful 'myriad' of messages:

C:\users\demo>make
gcc    -c main.c -o main.o
wait_for_any: WaitForMultipleObjects failed, win32 error 6
wait_for_any: Trying again.
gcc: Internal compiler error: program cc1 got fatal signal 127
MAKE.EXE: *** [main.o] Error 1
wait_found: GetExitCodeProcess failed!
wait_found: CloseHandle process failed
wait_found: CloseHandle thread failed
MAKE.EXE: *** [Unknown job 1001] Error 1

and win95 complaining about a page fault in CYGWIN.DLL:

GCC provoc=F3 un fallo de p=E1gina no v=E1lida en el =

m=F3dulo CYGWIN.DLL de 0137:10031800.
Registros:
EAX=3D0254fb28 CS=3D0137 EIP=3D10031800 EFLGS=3D00010206
EBX=3D00000001 SS=3D013f ESP=3D0456ff40 EBP=3D0456ff48
ECX=3D00000001 DS=3D013f ESI=3D00000028 FS=3D2f8f
EDX=3D82980628 ES=3D013f EDI=3D00000000 GS=3D0000
Bytes en CS:EIP:
8b 5e 04 4b 78 09 8b 44 9e 08 ff d0 4b 79 f7 8b =

Volcado de pila:
00000001 0000000c 0456ff64 100129cb 00010100 00000000 8155ca3c 00000000
00000001 0456ff80 bff9e62c 00000000 00000000 81562af4 81562fa0 0456ff70 =


It gets even worse when running from 'bash'

I hope this information helps hunting down the
problems I've experienced. I'm not able to download
everything (the sources are sooo big) and I'm just
running a 14.4 K line (the cdk was enough pain).


(Well, I'm running the spanish version of Win95,
with Service Pack 1 installed).

-- =

Pedro Andr=E9s Aranda Guti=E9rrez
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