[systemd-devel] stacked extension not working

[Umut Tezduyar Lindskog]

Thanks and I would have never figured it out without your help. However,
moving the binary to /opt didn't work either (I made sure there is empty
/opt in the base too). Anything else I am missing?

root at osboxes:/home/osboxes/Development# tree stackupper/
stackupper/
├── bin
│   └── umut
├── dev
├── etc
│   ├── machine-id
│   ├── resolv.conf
│   └── runtime
├── lib -> usr/lib
├── opt
│   └── tree
├── proc
├── root
├── run
├── sys
├── tmp
├── usr
│   ├── bin
│   └── lib
│       ├── extension-release.d
│       │   └── extension-release.base
│       └── systemd
│           └── system
│               └── stackupper.service
└── var
    └── tmp

18 directories, 7 files
root at osboxes:/home/osboxes/Development# cat
stackupper/usr/lib/systemd/system/stackupper.service
[Service]
Type=oneshot
ExecStart=/opt/tree /

On Fri, Oct 15, 2021 at 2:23 PM Luca Boccassi <bluca at debian.org> wrote:

> On Fri, 2021-10-15 at 12:18 +0000, Umut Tezduyar Lindskog wrote:
> > Hi, following works for us (for reference, configuration is printed
> > at the end)
> >
> > portablectl --now attach --extension=./stackupper ./base stackupper
> >
> > However, if we move the cat from base/usr/bin/cat to
> > stackupper/bin/cat it is not working. Seems like we cannot include
> > any library/executable in the extension.
> >
> > Are we missing something?
> >
> >
> > root at osboxes:/home/osboxes/Development# tree base/
> > base/
> > ├──bin
> > ├──dev
> > ├──etc
> > │   ├── machine-id
> > │   ├── os-release
> > │   └── resolv.conf
> > ├──lib
> > │   └── x86_64-linux-gnu
> > │       └── libc.so.6
> > ├──lib64
> > │   ├──ld-2.32.so
> > │   └── ld-linux-x86-64.so.2
> > ├──proc
> > ├──root
> > ├──run
> > ├──sys
> > ├──tmp
> > ├──usr
> > │   ├──bin
> > │   │   ├──cat
> > │   │   ├──echo
> > │   │   └── tree
> > │   └── lib
> > │       └── systemd
> > │           └── system
> > └── var
> >     └── tmp
> >
> > 18 directories, 9 files
> >
> > root at osboxes:/home/osboxes/Development# tree stackupper/
> > stackupper/
> > ├──bin
> > │   └── umut
> > ├──dev
> > ├──etc
> > │   ├── machine-id
> > │   ├── resolv.conf
> > │   └── runtime
> > ├──lib -> usr/lib
> > ├──proc
> > ├──root
> > ├──run
> > ├──sys
> > ├──tmp
> > ├──usr
> > │   ├──bin
> > │   └── lib
> > │       ├──extension-release.d
> > │       │   └── extension-release.base
> > │       └── systemd
> > │           └── system
> > │               └── stackupper.service
> > └── var
> >     └── tmp
> >
> > 17 directories, 6 files
> >
> > root at osboxes:/home/osboxes/Development# cat
> > stackupper/usr/lib/systemd/system/stackupper.service
> > [Service]
> > Type=oneshot
> > ExecStart=/usr/bin/cat /etc/os-release
> > root at osboxes:/home/osboxes/Development#systemctl --version
> > systemd 249 (249.4-1)
> > +PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT +GNUTLS -
> > OPENSSL +ACL +BLKID +CURL +ELFUTILS -FIDO2 +IDN2 -IDN +IPTC +KMOD
> > +LIBCRYPTSETUP -LIBFDISK +PCRE2 -PWQUALITY -P11KIT -QRENCODE +BZIP2
> > +LZ4 +XZ +ZLIB +ZSTD -XKBCOMMON +UTMP +SYSVINIT default-
> > hierarchy=unified
>
> Hi,
>
> You need to build your extension with the binaries under either the
> /usr or /opt hierarchies. Legacy locations like /bin and /lib are
> ignored. This is explained in the systemd-sysext.8 manpage.
>
> --
> Kind regards,
> Luca Boccassi
>
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