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nixos-enter: redirect to fd2 instead of a file named /dev/stderr

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In some cases, /dev/stderr may not point to a sensible location. For
example, running nixos-enter inside a systemd unit where the unit's
StandardOutput and StandardError are set to be sockets. In these
cases, this line would fail.

Piping to fd2 directly works just as well, even under strange and
twisted executions.

Co-authored-by: Michael Bishop <michael.bishop@iohk.io>
This commit is contained in:
Graham Christensen 2020-02-12 20:50:05 -05:00
parent 08444aa09b
commit 2d42fc240c
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GPG Key ID: FE918C3A98C1030F
1 changed files with 9 additions and 9 deletions
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18
nixos/modules/installer/tools/nixos-enter.sh
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@ -60,15 +60,15 @@ chmod 0755 "$mountPoint/dev" "$mountPoint/sys"
mount --rbind /dev "$mountPoint/dev"
mount --rbind /sys "$mountPoint/sys"
# If silent, write both stdout and stderr of activation script to /dev/null
# otherwise, write both streams to stderr of this process
if [ "$silent" -eq 0 ]; then
PIPE_TARGET="/dev/stderr"
else
PIPE_TARGET="/dev/null"
fi
(
# If silent, write both stdout and stderr of activation script to /dev/null
# otherwise, write both streams to stderr of this process
if [ "$silent" -eq 1 ]; then
exec 2>/dev/null
fi
# Run the activation script. Set $LOCALE_ARCHIVE to supress some Perl locale warnings.
LOCALE_ARCHIVE="$system/sw/lib/locale/locale-archive" chroot "$mountPoint" "$system/activate" >>$PIPE_TARGET 2>&1 || true
# Run the activation script. Set $LOCALE_ARCHIVE to supress some Perl locale warnings.
LOCALE_ARCHIVE="$system/sw/lib/locale/locale-archive" chroot "$mountPoint" "$system/activate" 1>&2 || true
)
exec chroot "$mountPoint" "${command[@]}"