Re: strange behavior

[Vincent Lefevre <vincent@vinc17.org>]

On 2011-04-11 16:26:18 +0200, Vincent Lefevre wrote:
> On 2011-01-30 14:25:40 -0800, Bart Schaefer wrote:
> > Possible epiphany:  zsh prints "zsh: exit 141" like that only if the
> > exit status came from a builtin or shell function (Src/exec.c).  For
> > all external commands or subshells it appends the jobtext after the
> > status number (Src/jobs.c).  Those are the only PRINTEXITVALUE cases.
> > 
> > Thus the exit value of 141 must be coming from one of these places:
> > 
> > (1) "read" builtin in the inner loop of "filter"
> > (2) "printf" in the ?* branch of the case in "filter"
> > (3) "echo" in the { ... } expression
> 
> I can reproduce the SIGPIPE problem when resizing the terminal window
> while the wrapper is being run. According to strace, it's (3).

and this is because the SIGWINCH seems to interrupt the "read"
(is it a bug?), so that

    while read -r $timeout -k -u 0 ch
    do
      line="$line$ch"
      [[ $ch = $'\012' ]] && break
      timeout=(-t 0.1)
    done

gives an empty string; hence the observed behavior.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Arénaire project (LIP, ENS-Lyon)