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Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password

From	Santiago Vila <sanvila@debian.org>
Newsgroups	linux.debian.bugs.dist
Subject	Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password
Date	2026-01-29 17:20 +0100
Message-ID	<MiCUp-efu4-5@gated-at.bofh.it> (permalink)
References	<MizMR-ed6h-7@gated-at.bofh.it> <MiAIV-edLN-15@gated-at.bofh.it> <MiASB-ee6e-3@gated-at.bofh.it> <MizMR-ed6h-7@gated-at.bofh.it> <MiASB-ee6e-3@gated-at.bofh.it>
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Hi. In the code you quoted:

  if command -v systemd-sysusers >/dev/null; then
    systemd-sysusers ${DPKG_ROOT:+--root="$DPKG_ROOT"} dbus.conf
  else
    in_sysroot adduser --system --quiet --group "$MESSAGEUSER"
  fi

we are inside a build chroot, which has only essential and
build-essential packages, so the command which works is the second one,
and this boils down to this command not working:

adduser --system --quiet --group "messagebus"

When the messagebus user has "!*", this used to work in trixie but it
does not work anymore in forky/sid. That seems to be the regression.

Would it be ok to reassign this to the adduser package?

Thanks.

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Thread

Bug#1126595: dbus-system-bus-common: Many packages FTBFS with the nocheck build profile due to weird dbus/adduser error Simon McVittie <smcv@debian.org> - 2026-01-29 15:00 +0100
  Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Santiago Vila <sanvila@debian.org> - 2026-01-29 15:20 +0100
  Bug#1126595: dbus-system-bus-common: Many packages FTBFS with the nocheck build profile due to weird dbus/adduser error Santiago Vila <sanvila@debian.org> - 2026-01-29 16:20 +0100
    Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Simon McVittie <smcv@debian.org> - 2026-01-29 18:20 +0100
      Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Santiago Vila <sanvila@debian.org> - 2026-01-29 19:50 +0100
      Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Simon McVittie <smcv@debian.org> - 2026-01-31 13:00 +0100
  Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Santiago Vila <sanvila@debian.org> - 2026-01-29 16:40 +0100
  Bug#1126595: dbus-system-bus-common: fatal: The user `messagebus' already exists and has a password Santiago Vila <sanvila@debian.org> - 2026-01-29 17:20 +0100

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