From a530984601629a8dc00cae4a9048ee29ab7fb578 Mon Sep 17 00:00:00 2001
From: Aaron LI <aaronly.me@outlook.com>
Date: Thu, 28 Apr 2016 22:05:42 +0800
Subject: make_stowbkg_image.sh: use the existing only one bgstow if no proper
 one found

---
 make_stowbkg_image.sh | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/make_stowbkg_image.sh b/make_stowbkg_image.sh
index ea75fef..4cd74b7 100755
--- a/make_stowbkg_image.sh
+++ b/make_stowbkg_image.sh
@@ -10,6 +10,7 @@
 #
 # Changelog:
 # 2016-04-28:
+#   * Use the existing only one bgstow if no proper bgstow found
 #   * Update keyword "DETNAM" after merge
 #
 
@@ -85,8 +86,13 @@ lookup_bgstow() {
         _bgstow=`\ls ${_dir}/${_det}${_year}-??-??bgstow*.fits | grep -v 'bgstow_cti'`
     fi
     if [ -z "${_bgstow}" ]; then
-        echo "ERROR: cannot found bgstow for blanksky: ${_dir}/${_blanksky}" >/dev/stderr
-        exit 100
+        if [ `\ls ${_dir}/${_det}${_year}-??-??bgstow*.fits | wc -l` -eq 1 ]; then
+            _bgstow=`\ls ${_dir}/${_det}${_year}-??-??bgstow*.fits`
+            echo "WARNING: no proper bgstow; but use the only one" > /dev/stderr
+        else
+            echo "ERROR: cannot found bgstow for blanksky: ${_dir}/${_blanksky}" >/dev/stderr
+            exit 100
+        fi
     fi
     echo "${_bgstow}"
     unset _dir _blanksky _det _year _bgstow
-- 
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