Re: [OpenWrt-Devel] [PATCH] base-files/hotplug: add "dialout" user group and use it for ttyXYZ devices

2019-03-31 Thread Jo-Philipp Wich
Hi Michael,

> well, it seems that the second commit did not survive (at least in master 
> branch)... 

indeed, it was broken by an improperly rebased commit:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=5209cfa534293cb6d27574b51d03bd69a5defb0c

I'd be fine with a v2 which reintroduces the lost hunk and renames tty
to dialout at the same time.

~ Jo



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Re: [OpenWrt-Devel] [PATCH] base-files/hotplug: add "dialout" user group and use it for ttyXYZ devices

2019-03-30 Thread Michael Heimpold
Hi,

> the "tty" group has been introduced exactly for this purpose some time
> ago (1)(2). Any reason why we need "dialout" as well?
> 
> ~ Jo
> 
> 1:
> https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=5523ee3459a2d3
> 46ad068ce359cdb60dcda1239d 2:
> https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=124ab1dc0a6235
> 007f60953a796bf29122dfa242

well, it seems that the second commit did not survive (at least in master 
branch)... 
I noticed the "tty" group on OpenWrt but on my desktop system, it has slightly 
different meaning, see https://wiki.debian.org/SystemGroups
So I guessed the meaning is the same on OpenWrt, thus the proposal to add 
"dialout" as well.

You are right, that we don't need a second group to the same purpose. However, 
then I'd propose to rename the group "tty" to "dialout" to prevent other users
to do the same mistake like me, i.e. confuse both groups due to mixing 
knowledge from other distros.

Michael


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Re: [OpenWrt-Devel] [PATCH] base-files/hotplug: add "dialout" user group and use it for ttyXYZ devices

2019-03-30 Thread Jo-Philipp Wich
Hi,

the "tty" group has been introduced exactly for this purpose some time
ago (1)(2). Any reason why we need "dialout" as well?

~ Jo

1:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=5523ee3459a2d346ad068ce359cdb60dcda1239d
2:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=124ab1dc0a6235007f60953a796bf29122dfa242



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[OpenWrt-Devel] [PATCH] base-files/hotplug: add "dialout" user group and use it for ttyXYZ devices

2019-03-29 Thread Michael Heimpold
This add that "well-known" group to the system database and changes
hotplug default rules to assign /dev/tty[A-Za-z]+[0-9]+ nodes
to this new group.

Background is to allow more fine-granulated permissions, e.g.
for daemons like ser2net which make UART ports available via network
and thus should not run as root when avoidable.

Signed-off-by: Michael Heimpold 
---
 package/base-files/files/etc/group  | 1 +
 package/system/procd/files/hotplug.json | 4 
 2 files changed, 5 insertions(+)

diff --git a/package/base-files/files/etc/group 
b/package/base-files/files/etc/group
index e8e2adf4ac..723a3832e8 100644
--- a/package/base-files/files/etc/group
+++ b/package/base-files/files/etc/group
@@ -3,6 +3,7 @@ daemon:x:1:
 adm:x:4:
 tty:x:5:
 mail:x:8:
+dialout:x:20:
 audio:x:29:
 www-data:x:33:
 ftp:x:55:
diff --git a/package/system/procd/files/hotplug.json 
b/package/system/procd/files/hotplug.json
index 1c949bbea3..4221e15fe9 100644
--- a/package/system/procd/files/hotplug.json
+++ b/package/system/procd/files/hotplug.json
@@ -20,6 +20,10 @@
[ "regex", "DEVNAME", "^snd" ],
[ "makedev", "/dev/%DEVNAME%", 
"0660", "audio" ]
],
+   [ "if",
+   [ "regex", "DEVNAME", 
"^tty[A-Za-z]+[0-9]+" ],
+   [ "makedev", "/dev/%DEVNAME%", 
"0660", "dialout" ]
+   ],
[ "if",
[ "has", "DEVNAME" ],
[ "makedev", "/dev/%DEVNAME%", 
"0600" ]
-- 
2.17.1


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