what are the USERID,PASSWD in /etc/passwd

I want to modify it so that i can get userid and passwd form the
given
unername
help me

#!/bin/bash
# realname.sh
#
# From username, gets "real name" from /etc/passwd.


ARGCOUNT=1 # Expect one arg.
E_WRONGARGS=65


file=/etc/passwd
pattern=$1


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


file_excerpt () # Scan file for pattern, then print relevant portion
of line.
{
while read line # "while" does not necessarily need "[ condition ]"
do
echo "$line" | grep $1 | awk -F":" '{ print $5 }' # Have awk use
":" delimiter.
done



} <$file # Redirect into function's stdin.


file_excerpt $pattern

# Yes, this entire script could be reduced to
# grep PATTERN /etc/passwd | awk -F":" '{ print $5 }'
# or
# awk -F: '/PATTERN/ {print $5}'
# or
# awk -F: '($1 == "username") { print $5 }' # real name from
username
# However, it might not be as instructive.


exit 0

.

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