bug report

[Sascha Scholz]

hi all,

first of all, sorry for the crosspost, but i don't know if this is 
readline or bash related. since readline is developd along with bash, i 
hope that's not too bad. ;-)

i encountered a bug which is happening if a program using libreadline is 
invoked in a shell script. this only happens in conjunction with bash 
(no problem wich e.g. tcsh).

if the program is killed (or segfaults, which happens sometimes with our 
project...) the terminal is broken (no input is displayed) which can 
only be repaired with the blind-typed 'reset' command. it happens if the 
program is invoked directly or with 'eval', but not with 'exec'. 
unfortunately the latter is not feasible for me, because i have to do 
some things in the script afterwards.

i attached a small testcase reproducing the bug on my system (redhat 
linux 8.0, i686). here's how to do it:

1. compile: g++ -o readline_test readline_test.c++ -lreadline -ltermcap
2. run readline_test.sh
3. from another terminal: killall -KILL readline_test

it would be nice, if this could be fixed since it's pretty annoying for me.

thanks,
sascha

#include <stdio.h>
#include <stdlib.h>
#include <readline/readline.h>

int main()
{
  char *buf;

  while (1) {
    buf = readline ("> ");
    
    if (0 == buf)
      break;
    
    if (buf[0] != '\0') {
      printf ("you typed: %s\n", buf);
    }
    free (buf);
  }
  putchar ('\n');
  
  return 0;
}

#! /bin/sh

eval readline_test