Re: shell kung-fu with set -e, return codes and i/o redirection in while read ... loop
Hello,
On 19/07/2009 Chow Loong Jin wrote:
> On Sunday 19,July,2009 07:45 PM, Jonas Meurer wrote:
> > so the script needs to be changed to exit the while loop with
> > information about whether
> > - the target was found in crypttab
> You already have that information. In the snippet of code:
>
> found="no"
> egrep -v "^[[:space:]]*(#|$)" "$TABFILE" | while read dst src key opts; do
> if [ "$1" = "$dst" ]; then
> found="yes"
> handle_crypttab_line_start "$dst" "$src" "$key" "$opts" <&3
> exit 0
> fi
> done 3<&1
>
> Note the value of the variable "found". If it's "yes", it was found,
> otherwise it's not.
no, unfortunately not. the while read ... loop opens a subshell, thus
the found="yes" inside is pointless.
greetings,
jonas
Reply to: