#!/bin/bash

# mkslocatedb--Builds the central, public locate database as user nobody,
#   and simultaneously steps through each user's home directory to find
#   those that contain an .slocatedb file. If found, an additional, private
#   version of the locate database will be created for that user.

setglobal locatedb = '"/var/locate.db'"
setglobal slocatedb = '".slocatedb'"

if test $[id -nu] != "root"  {
  echo "$0: Error: You must be root to run this command." > !2
  exit 1
}

if test $[grep '^nobody:' /etc/passwd] = ""  {
  echo "$0: Error: you must have an account for user 'nobody'" > !2
  echo "to create the default slocate database." > !2; exit 1
}

cd /            # sidestep post-su pwd permission problems

# First, create or update the public database
su -fm nobody -c "find / -print" > $locatedb !2 >/dev/null
echo "building default slocate database (user = nobody)"
echo ... result is $[wc -l < $locatedb] lines long.

# Now step through the user accounts on the system to see who has
#   a $slocatedb file in their home directory.
for account in [$[cut -d: -f1 /etc/passwd]]
{
  setglobal homedir = $[grep "^$(account):" /etc/passwd | cut -d: -f6]

  if test $homedir = "/"  {
    continue    # refuse to build one for root dir 
  } elif test -e $homedir/$slocatedb  {
    echo "building slocate database for user $account"
    su -m $account -c "find / -print" > $homedir/$slocatedb \
     !2 >/dev/null
    chmod 600 $homedir/$slocatedb
    chown $account $homedir/$slocatedb
    echo ... result is $[wc -l < $homedir/$slocatedb] lines long.
  }
}

exit 0