contrib/nvi/files/recover.in

   1 #!/bin/sh
   2 #
   3 # Script to recover nvi edit sessions.
   4
   5 RECDIR="@vi_cv_path_preserve@"
   6
   7 [ -d ${RECDIR} ] || exit 1
   8 find ${RECDIR} ! -type f -a ! -type d -delete
   9
  10 # Check editor backup files.
  11 vibackup=`echo ${RECDIR}/vi.*`
  12 if [ "${vibackup}" != '${RECDIR}/vi.*' ]; then
  13         echo -n 'Recovering vi editor sessions:'
  14         for i in ${RECDIR}/vi.*; do
  15                 # Only test files that are readable.
  16                 if [ ! -r "${i}" ]; then
  17                         continue
  18                 fi
  19
  20                 # Unmodified nvi editor backup files either have the
  21                 # execute bit set or are zero length.  Delete them.
  22                 if [ -x "${i}" -o ! -s "${i}" ]; then
  23                         rm -f "${i}"
  24                 fi
  25         done
  26 else exit
  27 fi
  28
  29 # It is possible to get incomplete recovery files, if the editor crashes
  30 # at the right time.
  31 virecovery=`echo ${RECDIR}/recover.*`
  32 if [ "${virecovery}" != "${RECDIR}/recover.*" ]; then
  33         for i in ${RECDIR}/recover.*; do
  34                 # Only test files that are readable.
  35                 if [ ! -r "${i}" ]; then
  36                         continue
  37                 fi
  38
  39                 # Delete any recovery files that are zero length, corrupted,
  40                 # or that have no corresponding backup file.  Else send mail
  41                 # to the user.
  42                 recfile=`awk '/^X-vi-data: *file;/ { sub(/^.*;/, " "); \
  43                     do { if (substr($0,1,1) == " ") print; else exit } \
  44                     while(getline) }' < "${i}" | uudecode -mr`
  45                 if [ -n "${recfile}" -a -s "${recfile}" ]; then
  46                         sendmail -odb -t < "${i}"
  47                         echo -n '.'
  48                 else
  49                         rm -f "${i}"
  50                 fi
  51         done
  52 fi
  53 echo ' done.'