Bug#913247: Please provide a C implementation of /lib/init/init-d-script

[Mert Dirik]

On Tue, 13 Nov 2018 20:22:16 +0000 Dmitry Bogatov <KAction at debian.org> 
wrote:
 >
 > [Adding systemd maintainers into thread]
 > (We are discussing #826214)
 >
 > [2018-11-11 22:37] Michael Biebl <biebl at debian.org>
 > > > #!/lib/init/init-d-script?
 > >
 > > It doesn't work with #!/lib/init/init-d-script either.
 > >
 > > Only
 > > ============================
 > > #!/bin/sh
 > >
 > > if [ true != "$INIT_D_SCRIPT_SOURCED" ] ; then
 > > set "$0" "$@"; INIT_D_SCRIPT_SOURCED=true . /lib/init/init-d-script
 > > fi
 > > ============================
 > > currently works wrt to systemctl redirection.
 >
 > At least it does not feel magic. In case of #!/lib/init/init-d-script,
 > $0 = /lib/init/init-d-script; in case of sourcing $0 is path to script
 > (/etc/init.d/foo).
 >
 > Now, issue seems to be /lib/lsb/init-functions.d/40-systemd from
 > bin:systemd. On line 7 we read:
 >
 > prog=${0##*/}
 >
 > As far as I know, there is no way to modify "$0". So we have two
 > options:
 >
 > * have systemd folks use `${__init_d_script_name##*/}' in
 > `40-systemd' instead of `$0'
 >
 > * write wrapper in C, which sets $0 to value, expected by `40-systemd'.
 > Actually, there is number of utilities floating around, which set $0
 > to arbitrary value (`chpst' from bin:runit is one of them :)), but we
 > do not want to add new dependency to essentail sysvinit-utils, don't
 > we?
 >
 > Opinions?
 >
 >

Hi,

I noticed the new snippet in the man page of experimental version uses the

#! /usr/bin/env /lib/init/init-d-script

shebang, which doesn't work with systemd redirection. I don't know any 
packages in the archive using /lib/init/init-d-script in the shebang 
line currently but I fear some scripts may start to use the new variant 
(thus hitting #826214 again).

Can you please consider changing it with the snippet in the old 
/etc/init.d/skeleton (the one using the INIT_D_SCRIPT_SOURCED trick), at 
least until a better solution can be found for this or #826214)