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Re: File descriptor leak in nested functions


From: Chet Ramey
Subject: Re: File descriptor leak in nested functions
Date: Sat, 17 Apr 2010 23:17:33 -0400
User-agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.7) Gecko/20100111 Lightning/1.0b1 Thunderbird/3.0.1

On 4/15/10 6:58 PM, Charles Duffy wrote:
> The provided reproducer was unnecessarily complicated. The following also
> reproduces the issue:
> 
> function get_fd_count() {
>         local fds
>         cd /proc/$$/fd; fds=( * ) # avoid a StackOverflow source colorizer bug
>         echo "address@hidden"
> }
> 
> function fd_leak_func() {
>         while : ; do
>                 echo ">> Current FDs: $(get_fd_count)"
>                 read retval new_state < <(set +e; new_state=$(echo
> foo); retval=$?; printf "%d %s\n" $retval $new_state)
>         done
> }
> 
> fd_leak_func
> 
> 
> Running the contents of fd_leak_func at top level, by contrast, does not
> reproduce the bug.

Thanks for the report.  This will be fixed in the next release of bash.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/




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