project help needed urgently

["manish bhatt" <manishhimanish rediffmail com>]

hi
i am having problen while accessing a shel script from grk 
program.the shell script consist of a set of tc statements for 
assigning a paricular bandwidth for a host .the shell script is as 
follows

 #! /bin/bash
 tc qdisc del dev eth0 root
 tc qdisc add dev eth0 root handoe 1: cbq abpkt 1000 bandwidth 
10
 tc qdisc add dev eth0 parent 1: classid 1:1 cbq rate $1 allot 
1500     prio 5 bounded isolated
 tc filter add dev eth0 parent 1: protocol ip prio 16 u32 match 
ip dst     $2 floid 1:1
 exit 0

  my gtk program as follows

    char *ent1;
    char *ent2;
     void ok_pressed (gtkwidget *widget ,gpointer *data)
       {
             ent1= gtk_entry_get_text(GTK.ENTRY(txt_entry)),
             ent2= gtk_entry_get_text(GTK.ENTRY(val_entry)),
             system ('/script ent2 ent1);
       }

 in above function when we call script through system function 
then the parameters passed (ent1 ent2) are not accepting giving 
error as illegal match but when numbers(VALUES) are passed instead 
of ent1 ent2 the script gets executed .

one more thing how to change font size
plz guide me