check.d/{disks,ntp}: Only perform the checks if relevant programs exist.

[rcheck] / rcheck

#! /bin/sh
###
### Run everyday health checks on remote systems.

set -e
prog=$0
while
  case "$prog" in */*) ;; *) prog=./$prog ;; esac
  cd "${prog%/*}"
  [ -L "${prog##*/}" ]
do
  prog=$(readlink "${prog##*/}")
done

for host in "$@"; do

  { { { set +e
	tar czf - check check.d |
	ssh "$host" '
set -e
cd /tmp

i=0
while :; do
  tmpdir=check.$$.$i
  if mkdir -m700 $tmpdir >/dev/null 2>&1; then break; fi
  case $i in
    500) echo >&2 "failed to create temporary directory"; exit 125 ;;
  esac
  i=$((i + 1))
done
trap "cd /; rm -rf /tmp/$tmpdir" INT TERM QUIT HUP EXIT
cd $tmpdir

tar xzf -
./check'
	rc=$?; set -e
	case $rc in
	  0) ;;
	  *) echo >&2 "remote check process failed (rc = $rc)" ;;
	esac
      } 1>&3; } 2>&1 |
    sed 's/^/!!! /'
  } 3>&1 |
  if read line; then
    cat <<EOF
###--------------------------------------------------------------------------
### $host

$line
EOF
    cat
  fi
done