Re: [PATCH] iptables: set the path of the lock file via a configure option.

[Pablo Neira Ayuso <pablo@netfilter.org>]

On Tue, Mar 14, 2017 at 05:55:50PM +0900, Lorenzo Colitti wrote:
> Currently the iptables lock is hardcoded as "/run/xtables.lock".
> Allow users to change this path using the --with-xt-lock-name
> option to ./configure option. This is useful on systems like
> Android which do not have /run.
> 
> Tested on Ubuntu, as follows:
> 
> 1. By default, the lock is placed in /run/xtables.lock:
> 
> $ make distclean-recursive && ./autogen.sh &&
>   ./configure --disable-nftables --prefix /tmp/iptables &&
>   make -j64 &&
>   make install &&
>   sudo strace -e open,flock /tmp/iptables/sbin/iptables -L foo
> ...
> open("/run/xtables.lock", O_RDONLY|O_CREAT, 0600) = 3
> flock(3, LOCK_EX|LOCK_NB)               = 0
> iptables: No chain/target/match by that name.
> 
> 2. Specifying the lock results in the expected location being
>    used:
> 
> $ make distclean-recursive && ./autogen.sh && \
>   ./configure --disable-nftables --prefix /tmp/iptables \
>   --with-xt-lock-name=/tmp/iptables/run/xtables.lock &&
>   make -j64 &&
>   make install &&
>   sudo strace -e open,flock /tmp/iptables/sbin/iptables -L foo
> ...
> open("/tmp/iptables/run/xtables.lock", O_RDONLY|O_CREAT, 0600) = 3
> flock(3, LOCK_EX|LOCK_NB)               = 0
> iptables: No chain/target/match by that name.

Applied, thanks Lorenzo!