smoke: the wrapper's markers go to stderr, where the journal redirect is

Three runs of missing markers, one cause: echo writes to stdout, and
the wrapper's logger redirect is stderr-only. Every marker landed on
VT1 while the children's log lines went to the journal — which made
a redirect problem read as a SIGPIPE problem and cost three CI laps.
echo >&2 on all six markers; goldens re-blessed; suite green.

Author: Letdown2491

src/containerfile/blocks.rs

@@ -542,7 +542,7 @@ exec 2> >(exec logger -t kuma-greeter)
 # The wrapper knows why the session ends: compositor death, socket
 # timeout, or greeter exit with its status. Say so — three laps of a
 # silent "greeter exited without creating a session" bought this.
-echo "wrapper: greetd started the session (pid $$)"
+echo >&2 "wrapper: greetd started the session (pid $$)"
 niri -c /usr/share/kumaos/greeter-niri.kdl &
 niri_pid=$!
 started=$SECONDS
@@ -557,27 +557,27 @@ for _ in $(seq 1 100); do
   [ -n "$sock" ] && break
   if ! kill -0 "$niri_pid" 2>/dev/null; then
     wait "$niri_pid"
-    echo "wrapper: niri died after $((SECONDS - started))s (exit $?)"
+    echo >&2 "wrapper: niri died after $((SECONDS - started))s (exit $?)"
     exit 1
   fi
   sleep 0.1
 done
 if [ -z "$sock" ]; then
-  echo "wrapper: no wayland socket after 10s, niri still alive"
+  echo >&2 "wrapper: no wayland socket after 10s, niri still alive"
   exit 1
 fi
-echo "wrapper: wayland socket up after $((SECONDS - started))s"
+echo >&2 "wrapper: wayland socket up after $((SECONDS - started))s"
 
 WAYLAND_DISPLAY=${sock##*/} /usr/bin/kuma-greeter
 rc=$?
-echo "wrapper: greeter exited rc=$rc after $((SECONDS - started))s"
+echo >&2 "wrapper: greeter exited rc=$rc after $((SECONDS - started))s"
 # the greeter only exits on success or crash: either way hand the
 # session back to greetd immediately, don't make it wait out its
 # 5-second patience on a compositor nobody is using
 cleanup
 trap - EXIT
 wait "$niri_pid" 2>/dev/null
-echo "wrapper: niri reaped (exit $?)"
+echo >&2 "wrapper: niri reaped (exit $?)"
 exit $rc
 "#;
 

src/containerfile/goldens/everything-on.manifest

@@ -49,7 +49,7 @@ kuma-fstab-sync 8d91559a751bb9871641d2295536dac4fca72da4ca6b66787f5765cc0f191021
 kuma-fstab-sync.service 9d865e627355d6a5abb8ca39d00e62c41ef3effffe1eb235caeb16691622925b
 kuma-greeter 001555c61143bba5fc71ab136eadf5444ac9e0189bf20cc7fca15a6eb0224e25
 kuma-greeter-check ba4ff3ab5f84f6e5623a73a5a1c6f1384522652536f797bcad7048b3514fba5a
-kuma-greeter-session ce70b9cb4e772bf15b902ab00919c721db8cf8ae345734ff8995a740d6cf19b5
+kuma-greeter-session 7b2dc7faf6752a4445c50398fa57d0ab4da855ba4c1a4eca65eefadddb70e627
 kuma-greeter-tmpfiles.conf ac57bb5086c057d537a424cd2d36924a739ef48e8b74b00baeb14bc4f8c4477e
 kuma-home-subvol b90db7dc4eabc2b9a95bdf90e7c93a432f6b818cb36c8135cde11138b39e2766
 kuma-home-subvol.service af9133fe3d2a930c432880a9937c71e8842e6d0fefbd75da065dc745240e4573

src/containerfile/goldens/niri.manifest

@@ -37,7 +37,7 @@ kuma-fstab-sync 8d91559a751bb9871641d2295536dac4fca72da4ca6b66787f5765cc0f191021
 kuma-fstab-sync.service 9d865e627355d6a5abb8ca39d00e62c41ef3effffe1eb235caeb16691622925b
 kuma-greeter 001555c61143bba5fc71ab136eadf5444ac9e0189bf20cc7fca15a6eb0224e25
 kuma-greeter-check ba4ff3ab5f84f6e5623a73a5a1c6f1384522652536f797bcad7048b3514fba5a
-kuma-greeter-session ce70b9cb4e772bf15b902ab00919c721db8cf8ae345734ff8995a740d6cf19b5
+kuma-greeter-session 7b2dc7faf6752a4445c50398fa57d0ab4da855ba4c1a4eca65eefadddb70e627
 kuma-greeter-tmpfiles.conf ac57bb5086c057d537a424cd2d36924a739ef48e8b74b00baeb14bc4f8c4477e
 kuma-home-subvol b90db7dc4eabc2b9a95bdf90e7c93a432f6b818cb36c8135cde11138b39e2766
 kuma-home-subvol.service af9133fe3d2a930c432880a9937c71e8842e6d0fefbd75da065dc745240e4573

src/containerfile/goldens/nostr.manifest

@@ -37,7 +37,7 @@ kuma-fstab-sync 8d91559a751bb9871641d2295536dac4fca72da4ca6b66787f5765cc0f191021
 kuma-fstab-sync.service 9d865e627355d6a5abb8ca39d00e62c41ef3effffe1eb235caeb16691622925b
 kuma-greeter 001555c61143bba5fc71ab136eadf5444ac9e0189bf20cc7fca15a6eb0224e25
 kuma-greeter-check ba4ff3ab5f84f6e5623a73a5a1c6f1384522652536f797bcad7048b3514fba5a
-kuma-greeter-session ce70b9cb4e772bf15b902ab00919c721db8cf8ae345734ff8995a740d6cf19b5
+kuma-greeter-session 7b2dc7faf6752a4445c50398fa57d0ab4da855ba4c1a4eca65eefadddb70e627
 kuma-greeter-tmpfiles.conf ac57bb5086c057d537a424cd2d36924a739ef48e8b74b00baeb14bc4f8c4477e
 kuma-home-subvol b90db7dc4eabc2b9a95bdf90e7c93a432f6b818cb36c8135cde11138b39e2766
 kuma-home-subvol.service af9133fe3d2a930c432880a9937c71e8842e6d0fefbd75da065dc745240e4573