[systemd-devel] [PATCH 1/3] core: Add LISTEN_NAMES environment variable
zbyszek at in.waw.pl
Sat May 16 14:28:22 PDT 2015
On Fri, May 15, 2015 at 05:35:48PM +0200, Lennart Poettering wrote:
> On Fri, 15.05.15 17:09, Krzysztof Opasiak (k.opasiak at samsung.com) wrote:
> > When passing file descriptors to service systemd
> > pass also two environment variable:
> > - LISTEN_PID - PID of service
> > - LISTEN_FDS - Number of file descriptors passed to service
> > Passed fds may have different types: socket, fifo etc.
> > To distinguish them sd-daemon library provides a set of
> > sd_is_*() functions which does stat on given fd and path
> > and check if this fd is relaten with this path.
> > This commit adds third environment variable:
> > - LISTEN_NAMES - paths/addresses of passed fds
> > this variable consist of fds names separated by :.
> > Each fd name consist of two parts:
> > fd_type=fd_address
> Why do we need the type at all? It can always be derived from the fd
> anyway, so why specify?
Why it the motivation? Patch description talks tabout passing the
path/address in LISTEN_NAMES. Isn't this something that can be queried
already? TODO talks about "identifiers". Is "identifier" the same thing,
or did the TODO item about have some different meaning?
More information about the systemd-devel