bash bug : here is the TCL script

[Aldo Mazzilli <aldo.mazzilli@inria.fr>]

I've written a TCL script which does the following things :

        1 --> gets a Shell command from stdin
        2 --> open a Bash shell within a pipe
        3 --> puts the command on the pipeline
        4 --> gets the result

Here it is :
------------

button .exit -text "Exit" -command exit
pack .exit  -fill x
 
text .text -width 60 -height 3
pack .text
 
if [catch {open "|sh 2>@ stdout" r+} input] {
        } else {
                fconfigure $input -buffering none
                fileevent $input readable Log
        }
 
puts $input "pwd"
 
proc Log {} {
        global input
        if {[gets $input line]<0} {
                close $input
        } else {
                .text insert end $line\n
                .text see end
        }
}
----------------------------------------------------------------------



PROBLEM :
I can't get any results after the 4th step with Cygnus Solution : :-(
I get the right result with MKS KSH or UWIN KSH :  :-)
Can you give me any reason, please ???

======================================================================= 
        
My TCL script can easily be translated into the following C program :
        
#include <stdio.h>
 
FILE           *recep, *df;
main()
{
        char            buf[BUFSIZ];
        char            string[256], rec[256];
 
        printf("Enter your command :") ;
        scanf("%s", &string) ;
        strcat(string,"\n") ;
        df = popen("sh", "wb");
        fputs(string, df) ;
        while (fgets(buf, BUFSIZ, df) != NULL)
              (void) printf("%s", buf);
        pclose(df) ;
}


This C program works fine under Cygnus, MKS and UWIN solutions.
-- 
=======================================================================
,',',',',',',' Aldo MAZZILLI             | INRIA Rhone-Alpes          |
,',',',',',',' aldo.mazzilli@inrialpes.fr| 655, avenue de l'Europe    |
,',',',',',',' Tel : 04 76 61 53 91      | 38330 Montbonnot St Martin |
,',',',',',',' Fax : 04 76 61 52 52      | FRANCE                     |
,',' *** Site WEB : http://www.inrialpes.fr/vasy/people/Aldo.Mazzilli |
=======================================================================

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