From f7eab4ae4b364489a6b985c5a1605846a23f4cf1 Mon Sep 17 00:00:00 2001
From: Carl N Baldwin <cnb@plane.(none)>
Date: Fri, 28 Oct 2005 21:57:27 -0600
Subject: [PATCH] Fix up the burn script

---
 scripts/burn-imgs.sh | 85 ++++++++++++++++++++++++++++----------------
 1 file changed, 54 insertions(+), 31 deletions(-)

diff --git a/scripts/burn-imgs.sh b/scripts/burn-imgs.sh
index a180c4d..a6a5ba9 100755
--- a/scripts/burn-imgs.sh
+++ b/scripts/burn-imgs.sh
@@ -1,39 +1,62 @@
 #!/bin/sh
 
+PATH=/bin:/usr/bin
+
 mailto=carl@ecbaldwin.net
 dev="/dev/hdc"
 sdev="ATA:1,0,0"
 imagedir="/backup/imgs"
 
-img=$(ls $imagedir | head -n 1)
-echo $img
-
-if [ -n "$img" ]; then
-  if cdrecord-wrapper.sh -dao speed=8 dev=$sdev $isoimage; then
-    md5sum=$(tempfile)
-    dd if=$dev bs=1M count=4440 | md5sum | awk '{print$1}' > $md5sum
-    if ! cmp $md5sum $isoimage.md5sum; then
-      echo "Failed" | mailx -s "DVD md5sum doesn't match image file!!!" $mailto
-      exit 1
-    else
-      echo $md5sum >> $img.stat
-    fi
-  else
-    echo "Failed" | mailx -s "DVD burning failed!!!" $mailto
-    exit 1
-  fi
-
-  {
-    echo "Image md5sum:"
-    cat $img.md5sum
-    echo
-    echo "md5sum of burned disks:"
-    cat $img.stat
-  } | mailx -s "DVD burned.  File it as ${img%.*}" $mailto
-
-  if [ "$(wc -l $img.stat 2>/dev/null)" == "2" ]; then
-    echo "Burned the image twice.  Removing it!"
-    rm -f $img{,.md5sum,.stat}
-    rmdir $img.mnt
-  fi
+# Discover disk images by looking for .img.md5sum files in $imagedir
+imgmd5=$(ls $imagedir/*.img.md5sum | head -n 1)
+
+logfile=$(tempfile)
+
+# If we didn't find an non-empty file then exit gracefully
+[ -z "$imgmd5" ] && exit 0
+[ -s "$imgmd5" ] || exit 0
+
+# Get the name of the disk image by stripping off the tailing '.md5sum'
+img=${imgmd5%.md5sum}
+
+# A little paranoia.  Make sure the disk image file is there.
+[ -z "$img" ] && exit 1
+[ -s "$img" ] || exit 1
+
+# Burn the image to a disk.
+cdrecord-wrapper.sh -dao dev=$sdev $isoimage > $logfile 2>&1
+
+if [ 0 != "$?" ]; then
+  echo >&2 "cdrecord failed!"
+  exit 1
+fi
+
+# Now verify the disk by running md5sum on the entire contents of the disk
+md5sum=$(tempfile)
+dd if=$dev bs=1M count=4440 2>$logfile | md5sum | awk '{print$1}' > $md5sum
+
+# Check that the md5sums match
+if ! cmp $md5sum $isoimage.md5sum; then
+  echo "Failed" | mailx -s "DVD md5sum doesn't match image file!!!" $mailto
+  exit 1
+fi
+
+# Record the date in the stat file to indicate that this burn was a success
+date >> $img.stat
+
+{ # Send e-mail
+  echo "Image md5sum:"
+  cat $img.md5sum
+  echo
+  echo "md5sum of burned disks:"
+  cat $img.stat
+  echo
+  cat $logfile
+} | mailx -s "DVD burned.  File it as ${img%.*}" $mailto > $logfile 2>&1
+
+# Two lines in the stat file indicate two successful burns.  Clean-up the image.
+if [ "$(wc -l $img.stat 2>/dev/null)" == "2" ]; then
+  # Burned the image twice.  Removing it and associated files!
+  rm -f $img{,.md5sum,.stat}
+  [ -d $img.mnt ] && rmdir $img.mnt
 fi
-- 
2.34.1