From c064acd78e418943edae8ec2998f855721157f30 Mon Sep 17 00:00:00 2001 From: Giuseppe Scrivano Date: Mon, 29 Mar 2021 11:45:40 +0200 Subject: service: use LISTEN_FDS if LISTEN_FDS is specified by systemd, we need to use the first fd after the std files (so fd=3) to read from the activation socket instead of manually opening the UNIX socket. [NO TESTS NEEDED] Closes: https://github.com/containers/podman/issues/9251 Signed-off-by: Giuseppe Scrivano --- cmd/podman/system/service_abi.go | 30 +++++++++++++++++++++--------- 1 file changed, 21 insertions(+), 9 deletions(-) (limited to 'cmd/podman') diff --git a/cmd/podman/system/service_abi.go b/cmd/podman/system/service_abi.go index 0e96e1fbb..9e8a9f9b4 100644 --- a/cmd/podman/system/service_abi.go +++ b/cmd/podman/system/service_abi.go @@ -24,16 +24,28 @@ func restService(opts entities.ServiceOptions, flags *pflag.FlagSet, cfg *entiti ) if opts.URI != "" { - fields := strings.Split(opts.URI, ":") - if len(fields) == 1 { - return errors.Errorf("%s is an invalid socket destination", opts.URI) + if os.Getenv("LISTEN_FDS") != "" { + // If it is activated by systemd, use the first LISTEN_FD (3) + // instead of opening the socket file. + f := os.NewFile(uintptr(3), "podman.sock") + l, err := net.FileListener(f) + if err != nil { + return err + } + listener = &l + } else { + fields := strings.Split(opts.URI, ":") + if len(fields) == 1 { + return errors.Errorf("%s is an invalid socket destination", opts.URI) + } + network := fields[0] + address := strings.Join(fields[1:], ":") + l, err := net.Listen(network, address) + if err != nil { + return errors.Wrapf(err, "unable to create socket") + } + listener = &l } - address := strings.Join(fields[1:], ":") - l, err := net.Listen(fields[0], address) - if err != nil { - return errors.Wrapf(err, "unable to create socket") - } - listener = &l } // Close stdin, so shortnames will not prompt -- cgit v1.2.3-54-g00ecf