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Old 06-30-2010, 10:25 PM
Victor Lowther
 
Default Slightly simplify hook-running infrastructure.

On Thu, 2010-07-01 at 00:00 +0200, Thomas Bächler wrote:
> Am 30.06.2010 23:47, schrieb Victor Lowther:
> > Go ahead and declare add_hook and run_hook as readonly functions
> > to prevent hooks from overwriting them. Too bad bash does not have
> > lexically scoped variables -- if it does, we could do the same with
> > the hook_funcs associative array.
>
> Lots of hunks below that have nothing to do with the actual change made
> here:

Probably got smashed in. I did alot of git rebase -i to clean things
up. Splitting it back out will not be a problem.

> > diff --git a/functions b/functions
> > index 8bbdfc6..d9f55fa 100644
> > --- a/functions
> > +++ b/functions
> > @@ -148,38 +148,39 @@ in_array() {
> > # daemons:
> >
> > add_daemon() {
> > - [ -d /var/run/daemons ] || /bin/mkdir -p /var/run/daemons
> > - /bin/touch /var/run/daemons/$1
> > + [[ -d /var/run/daemons ]] || /bin/mkdir -p /var/run/daemons
> > + > /var/run/daemons/"$1"
> > }
> >
> > rm_daemon() {
> > - /bin/rm -f /var/run/daemons/$1
> > + /bin/rm -f /var/run/daemons/"$1"
> > }
> >
> > ck_daemon() {
> > - [ -f /var/run/daemons/$1 ] && return 1
> > - return 0
> > + [[ ! -f /var/run/daemons/$1 ]]
> > }
> >
> > -ck_depends() {
> > - for daemon in $@; do
> > - if ck_daemon $daemon; then
> > - /etc/rc.d/$daemon start
> > - fi
> > - done
> > +have_daemon() {
> > + [[ -x /etc/rc.d/"$1" ]]
> > }
> >
> > start_daemon() {
> > - /etc/rc.d/$1 start
> > + have_daemon "$1" && /etc/rc.d/"$1" start
> > +}
> > +
> > +ck_depends() {
> > + for daemon in "$@"; do
> > + ck_daemon "$daemon" && start_daemon "$daemon"
> > + done
> > }
> >
> > start_daemon_bkgd() {
> > stat_bkgd "Starting $1"
> > - (/etc/rc.d/$1 start) &>/dev/null &
> > + have_daemon "$1" && (start_daemon "$1") &>/dev/null &
> > }
> >
> > stop_daemon() {
> > - /etc/rc.d/$1 stop
> > + have_daemon "$1" && /etc/rc.d/"$1" stop
> > }
>
> Here the actual patch starts, the above doesn't belong into this patch.
> You should _really_ check out git add -p/-i
>
> > # Status functions
> > @@ -234,24 +235,26 @@ ck_status() {
> > # single_postkillall: after all processes have been killed in rc.single
> > # shutdown_poweroff: directly before powering off in rc.shutdown
> > #
> > -# Make sure to never override the add_hook and run_hook functions via functions.d
> > +# Declare add_hook and run_hook as read-only to prevent overwriting them.
> > +# Too bad we cannot do the same thing with hook_funcs
> >
> > declare -A hook_funcs
> >
> > add_hook() {
> > - [ -z "$1" -o -z "$2" ] && return 1
> > - hook_funcs["$1"]="${hook_funcs["$1"]} $2"
> > + [[ $1 && $2 ]] || return 1
> > + hook_funcs["$1"]+=" $2"
> > }
>
> += in bash? Really? Didn't know that worked.
>
> > run_hook() {
> > - local func
> > -
> > - [ -z "$1" ] && return 1
> > - for func in ${hook_funcs["$1"]}; do
> > - ${func}
> > - done
> > + [[ $1 ]] || return 1
> > + local func
> > + for func in ${hook_funcs["$1"]}; do
> > + "${func}"
> > + done
> > }
> >
> > +declare -r add_hook run_hook
> > +
>
> Nice, I didn't know you could do that.
>
> > # Function for setting console font if required
> > set_consolefont() {
> > if [ -n "$CONSOLEFONT" ]; then
>
>

--
Victor Lowther
LPIC2 UCP RHCE
 

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