Re: feature request: support specifying Unix socket with systemd directive OpenFile=

On Thu, Jun 22, 2023 at 5:53 PM Dan Fandrich via curl-users
<[email protected]> wrote:
> How about just doing this like inetd and passing the fd in as stdin?

Unfortunately, it's not possible here. File descriptors originating
from OpenFile= are passed by systemd as file descriptor number 3 or
higher.
Quote:
"The first file descriptor may be found at file descriptor number 3
(i.e. SD_LISTEN_FDS_START), the remaining descriptors follow at 4, 5,
6, …, if any."
from
https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html

Quote:
"See sd_listen_fds(3) for more details on how to retrieve these file
descriptors."
from
https://www.freedesktop.org/software/systemd/man/systemd.service.html#OpenFile=

Erik
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