[OpenWrt-Devel] polluted env-space after running OpenWrt-helper scripts

[Yousong Zhou]

On 3 November 2015 at 19:19, Bastian Bittorf <bittorf at bluebottle.com> wrote:
> while debugging things, we saw that each
> command invoked via rc.common->service or
> /lib/functions/network.sh -> config_load
> pollutes the env-space a *lot*. here it is
> for each service ~20k.
>
> some things are easy for getting rid of:
> one can call 'network_flush_cache()' from
> /lib/functions/network.sh
>

network_flush_cache only unsets last ubus call result.

> but i'am unsure how to unset all these vars:

Vars set from parsing uci config are exported with `-n` flag by
default, so these should disappear once the current shell quits.

If it really matters,

 - Scan the result of "set" command and "unset" them at your will.
 - Load and parse uci in a subshell

Cheers,
                yousong

>
> CONFIG_APPEND=''
> CONFIG_LIST_STATE='cfg064d76_interface cfg084d76_interface'
> CONFIG_NUM_SECTIONS='10'
> CONFIG_SECTION='cfg146b70'
> CONFIG_SECTIONS='cfg02d149 cfg0491cc cfg064d76 cfg084d76 cfg0a4e54
> cfg0c4e54 cfg0e4e54 cfg104e54 cfg126b70 cfg146b70'
> CONFIG_cfg02d149_AllowNoInt='yes'
> CONFIG_cfg02d149_ClearScreen='no'
> CONFIG_cfg02d149_DebugLevel='0'
> CONFIG_cfg02d149_FIBMetric='flat'
> CONFIG_cfg02d149_IpVersion='4'
> CONFIG_cfg02d149_LinkQualityAlgorithm='etx_ff'
> CONFIG_cfg02d149_LinkQualityFishEye='1'
> CONFIG_cfg02d149_MainIp='10.63.2.33'
> CONFIG_cfg02d149_MprCoverage='7'
> CONFIG_cfg02d149_TYPE='olsrd'
> CONFIG_cfg02d149_TcRedundancy='2'
> CONFIG_cfg02d149_Willingness='7'
> CONFIG_cfg02e48a_TYPE='system'
> CONFIG_cfg02e48a_cronloglevel='9'
> CONFIG_cfg02e48a_hostname='EG-labor-AP'
> CONFIG_cfg02e48a_log_size='16'
> CONFIG_cfg02e48a_timezone='CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00'
> [...]
>
> is there a concept for it?
>
> also: what about calling 'network_flush_cache()' directly
> before starting a service with 'service -S "$@"' in
> /lib/functions/service.sh -> service_start()
>
> bye, bastian
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel