[LEDE-DEV] Fwd: Re: convention on uid/gid for packages

[Karl Palsson]

Yousong Zhou <yszhou4tech at gmail.com> wrote:
> On 19 May 2017 at 18:44, Karl Palsson <karlp at tweak.net.au>
> wrote:
> > Resending to the list properly as planned...
> >
> >
> > I've modified one of my packages (mosquitto) to use the
> > autoassignment style, as it never cared about the actual uid/gid.
> >
> > However, is this really the expected behaviour?
> >
> > # cat /etc/passwd
> > root:x:0:0:root:/root:/bin/ash
> > daemon:*:1:1:daemon:/var:/bin/false
> > ftp:*:55:55:ftp:/home/ftp:/bin/false
> > network:*:101:101:network:/var:/bin/false
> > nobody:*:65534:65534:nobody:/var:/bin/false
> > avahi:x:105:105:avahi:/var/run/avahi:/bin/false
> > dnsmasq:x:453:453:dnsmasq:/var/run/dnsmasq:/bin/false
> > mosquitto:x:100:102:mosquitto:/var/run/mosquitto:/bin/false <<<
> > 100:102??
> >
> >
> > I know I don't care, but getting 100 for uid and 102 for gid
> > seems somewhat unexpected? Is it issuing ids from the same
> > sequence or something?
> >
> 
> no, this is not how group_add_next works. please check the
> content of /etc/group and see if there might already exist a
> group of name "network" with id 101.
> 

Correct, "network" was a group too.  But they why did it pick userid 100 for my service?  

Anyway, as I don't _really_ need them to have the same numbers
for uid/gid, it's just traditional, is it now ok to go and make
my package use the autoassignment? Or is this something that
should get tidied up further in the autoassignment code?

Sincerely,
Karl Palsson

# cat /etc/passwd 
root:x:0:0:root:/root:/bin/ash
daemon:*:1:1:daemon:/var:/bin/false
ftp:*:55:55:ftp:/home/ftp:/bin/false
network:*:101:101:network:/var:/bin/false
nobody:*:65534:65534:nobody:/var:/bin/false
avahi:x:105:105:avahi:/var/run/avahi:/bin/false
dnsmasq:x:453:453:dnsmasq:/var/run/dnsmasq:/bin/false
mosquitto:x:100:102:mosquitto:/var/run/mosquitto:/bin/false

# cat /etc/group 
root:x:0:
daemon:x:1:
adm:x:4:
mail:x:8:
audio:x:29:
www-data:x:33:
ftp:x:55:
users:x:100:
network:x:101:
nogroup:x:65534:
avahi:x:105:avahi
dnsmasq:x:453:dnsmasq
mosquitto:x:102:mosquitto
root at eg-037BCC:/#
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