Fix package-verify false negatives: symlink traversal + prefix collision

podman-verify-packages.sh/podman-update-packages.sh reported every
package as "not installed" right after a genuinely successful install.
Root cause: /var/log/packages is itself a symlink on Unraid (->
../lib/pkgtools/packages), and GNU find's default -P mode doesn't
descend into a symlinked starting path at all without -L — confirmed
live by running the exact same find both with and without -L against a
host where the packages had just installed successfully.

Fixing that alone surfaced a second, previously-masked bug: "podman"'s
own glob also matches podman-compose's file (a literal prefix
collision), and find's unsorted output let podman-compose's record
silently win podman's own check.

Both fixed once via a new shared podman_find_installed_package_record()
helper in podman-common.sh, rather than separately in each caller.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

plugin/sbin/podman-common.sh

@@ -195,6 +195,55 @@ podman_path_has_real_mount_ancestor() {
   [ "$parent" != "/" ] && [ "$(stat -c %d "$parent")" != "$(stat -c %d /)" ]
 }
 
+# -----------------------------------------------------------------------------
+# podman_find_installed_package_record <name> <all-package-names...>
+#
+# Prints the /var/log/packages/<name>-... record for <name> (empty/failure
+# if not installed). Two real bugs, both found live on an actual host,
+# fixed here once instead of separately in every script that needs this:
+#
+#   -L: /var/log/packages is itself a symlink on Unraid (->
+#   ../lib/pkgtools/packages) — without it, GNU find's default -P mode
+#   doesn't descend into it AT ALL (it returns just the symlink itself and
+#   nothing below it), so every package was reported "not installed"
+#   regardless of what had actually just been installed.
+#
+#   Prefix collision: a plain `-name "$name-*"` glob for "podman" also
+#   matches podman-compose's file ("podman" is a literal prefix of
+#   "podman-compose"), and find's output order isn't sorted, so whichever
+#   one happened to come back first silently won — on a real host, that
+#   was podman-compose's record, reported as if it were podman's own.
+#   Explicitly skip any match that actually belongs to a different, more
+#   specific name also in the given package list.
+# -----------------------------------------------------------------------------
+podman_find_installed_package_record() {
+  local name="$1"
+  shift
+  local all_names=("$@")
+  local candidate other belongs_to_other base
+  while IFS= read -r candidate; do
+    [ -n "$candidate" ] || continue
+    base=$(basename "$candidate")
+    belongs_to_other=0
+    for other in "${all_names[@]}"; do
+      # Only a LONGER (more specific) other name can steal a match —
+      # "podman" is itself a prefix of "podman-compose", so without the
+      # length check, searching for "podman-compose" would wrongly
+      # exclude its own, genuinely correct record too (found live: this
+      # exact over-correction on the very first fix attempt).
+      if [ "$other" != "$name" ] && [ "${#other}" -gt "${#name}" ] && [ "${base#"$other"-}" != "$base" ]; then
+        belongs_to_other=1
+        break
+      fi
+    done
+    if [ "$belongs_to_other" -eq 0 ]; then
+      echo "$candidate"
+      return 0
+    fi
+  done < <(find -L /var/log/packages -maxdepth 1 -name "${name}-*" -print 2> /dev/null)
+  return 1
+}
+
 # -----------------------------------------------------------------------------
 # podman_require_command <binary>
 #

plugin/sbin/podman-update-packages.sh

@@ -68,7 +68,12 @@ for name in $targets; do
     continue
   fi
 
-  installed_record=$(find /var/log/packages -maxdepth 1 -name "${name}-*" -print 2> /dev/null | head -n1)
+  # See podman-common.sh's podman_find_installed_package_record() for why
+  # this isn't just a plain `find ... -name "$name-*" | head -n1` — note
+  # it's given $ALL_PACKAGES (not $targets), since prefix-collision
+  # detection needs the full component universe even when only updating
+  # a subset of it.
+  installed_record=$(podman_find_installed_package_record "$name" $ALL_PACKAGES)
   installed_basename=$(basename "${installed_record:-__none__}")
 
   case "$installed_basename" in

plugin/sbin/podman-verify-packages.sh

@@ -72,7 +72,9 @@ for name in $PACKAGES; do
   report "  expected version:  $expected_version"
 
   # --- Check 1: installed -----------------------------------------------
-  installed_record=$(find /var/log/packages -maxdepth 1 -name "${name}-*" -print 2> /dev/null | head -n1)
+  # See podman-common.sh's podman_find_installed_package_record() for why
+  # this isn't just a plain `find ... -name "$name-*" | head -n1`.
+  installed_record=$(podman_find_installed_package_record "$name" $PACKAGES)
   if [ -z "$installed_record" ]; then
     report "  installed:         NO"
     podman_log_error "verify: $name is not installed (no /var/log/packages/$name-* record)"