misc/infrastructure/cat-if-error.sh

   1 #!/bin/sh
   2
   3 logfile=$1
   4 shift
   5
   6 if ! lockfile-create "$logfile.lock" >/dev/null 2>&1; then
   7         exit 1
   8 fi
   9 lockfile-touch "$logfile.lock" & lockpid=$!
  10
  11 if "$@" >"$logfile" 2>&1; then
  12         : # all is well
  13 else
  14         cat "$logfile"
  15 fi
  16
  17 kill $lockpid
  18 lockfile-remove "$logfile.lock"