debian/ceph-common.postinst: set user directory using adduser

now that adduser allows us to set its home directory, we can do
this using adduser instead of using usermod. this change also
silences the warning from lintian
"maintainer-script-lacks-home-in-adduser". lintian complains if
`adduser --system` is called without passing `--home` option.

also, take this opportunity to s/-c/--comment/ in the command line
of `usermod`, for better readability.

Fixes: https://tracker.ceph.com/issues/64069
Signed-off-by: Kefu Chai <tchaikov@gmail.com>
(cherry picked from commit a1a857698cad4f2feeea0b56fd781350e44078b7)
(cherry picked from commit 776a089b09c70ee45f2c84eec05279d6826abf15)

diff --git a/debian/ceph-common.postinst b/debian/ceph-common.postinst
index d147de5386b2dbff0d2ace1500b61815f8ace9c6..e058d096ee1a100810059fddd8d955fdd95d7c1f 100644 (file)
--- a/debian/ceph-common.postinst
+++ b/debian/ceph-common.postinst
@@ -52,16 +52,20 @@ case "$1" in
                  --system \
                  --no-create-home \
                  --disabled-password \
+                 --home $SERVER_HOME \
                  --uid $SERVER_UID \
                  --gid $SERVER_GID \
                  $SERVER_USER 2>/dev/null || true
          echo "..done"
        fi
        # 3. adjust passwd entry
+       # NOTE: we should use "adduser --comment" if we don't need to
+       # support adduser <3.136. "adduser --gecos" is deprecated,
+       # and will be removed, so we don't use it. the first distro
+       # using --comment is debian/trixie or ubuntu/mantic.
        echo -n "Setting system user $SERVER_USER properties.."
-       usermod -c "$SERVER_NAME" \
-               -d $SERVER_HOME   \
-               -g $SERVER_GROUP  \
+       usermod --comment "$SERVER_NAME" \
+               --gid $SERVER_GROUP      \
                $SERVER_USER
        # Unlock $SERVER_USER in case it is locked from an uninstall
        if [ -f /etc/shadow ]; then