diplodocus.org Git - nmh/blob - etc/mhn.find.sh

   1 #! /bin/sh
   2 #
   3 # mhn.find.sh -- check if a particular command is available
   4 #
   5
   6 if test -z "$2"; then
   7     echo "usage: mhn.find.sh search-path program" 1>&2
   8     exit 1
   9 fi
  10
  11 # PATH to search for programs
  12 SEARCHPATH=$1
  13
  14 # program to search for
  15 PROGRAM=$2
  16
  17 PGM= oIFS="$IFS" IFS=":"
  18 for A in $SEARCHPATH; do
  19
  20     # skip the directories `.' and `..'
  21     if test "$A" = "." -o "$A" = ".."; then
  22         continue
  23     fi
  24
  25     # if program was found in /usr/local/bin, then
  26     # just echo program name, else echo full pathname
  27     if test -f "$A/$PROGRAM"; then
  28         if test "$A" = "/usr/local/bin"; then
  29             PGM="$PROGRAM"
  30         else
  31             PGM="$A/$PROGRAM"
  32         fi
  33
  34         echo "$PGM"
  35         exit 0
  36     fi
  37 done
  38 IFS="$oIFS"
  39