Subshell process groups

[Gregory Borota]

From: greg
To: bug-bash@gnu.org
Subject: Subshell process groups

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: cygwin
Compiler: i686-pc-cygwin-gcc
Compilation CFLAGS:  -DPROGRAM='bash.exe' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='cygwin' -DCONF_MACHTYPE='i686-pc-cygwin' 
-DCONF_VENDOR='pc' -DSHELL -DHAVE_CONFIG_H -DRECYCLES_PIDS  -I. 
-I/home/RLandheer/cygwin-contrib/bash/2.05b-16/bash-2.05b 
-I/home/RLandheer/cygwin-contrib/bash/2.05b-16/bash-2.05b/include 
-I/home/RLandheer/cygwin-contrib/bash/2.05b-16/bash-2.05b/lib  -O2
uname output: CYGWIN_NT-5.1 lap 1.5.7(0.109/3/2) 2004-01-30 19:32 i686 
unknown unknown Cygwin
Machine Type: i686-pc-cygwin

Bash Version: 2.05b
Patch Level: 0
Release Status: release

Description:
        #!/bin/bash
        (
        # sleep 1 # or whatever slower commmand!
        set -m;
        sleep 10 & # or whatever command that takes time to complete
        set +m;
        pid=$!
        ( sleep 1; kill -- -$pid ) &
        wait $pid
        )

        #  without the first line commented you get:
        #  ./bug.sh: line 8: kill: (-760) - No such process

        #  otherwise things work as expected
        #  ./bug.sh: line 10:   492 Terminated              sleep 10

Repeat-By:
        $ ./bug.sh