获取用户名 #

#!/bin/bash

ARGCOUNT=1
E_ARGEXIT=65
FILE=/etc/passwd

if [ $# -ne $ARGCOUNT ]
then
  echo "Usage: `basename $0` USERNAME"
  exit $E_ARGEXIT
fi

find_user ()
{
  while read line
  do
    echo "$line" | awk -F ":" '{print $5}' | grep $1
  done  
}<$FILE

find_user $1
exit 0