parpass

#! /bin/bash
#
# parpass 1.1.1	- 2020-06-16
#
# Reads the password file /etc/passwd and search for user names which
# begin with $1, and parses the record for printing it in human
# readable form to the screen.
#
# Bernd Storck
#
# Contact: https://www.facebook.com/BStLinux/
# 

SCRIPT="parpass"
TITLE="$SCRIPT (parsePasswd)"
VERSION="1.1.1"
OLDIFS="$IFS"
IFS=":"

if [ "$(echo "$LANG" | cut -c 1-2)" == "de" ]; then
	UILANG="Deutsch"
	label_ID="IDs (uid/gid)"
	label_homeDir="Verzeichnis"
	label_loginShell="Login-Shell"
	label_realName="Realname"
	label_room="Zimmer"
	label_workPhone="Telefon"
	label_phone="Privat"
	label_comment="Kommentar";
else
	UILANG="English"
	label_ID="IDs (uid/gid)"
	label_homeDir="Directory"
	label_loginShell="Login Shell"
	label_realName="Real Name"
	label_room="Room"
	label_workPhone="Work Fon"
	label_phone="Home Phone"
	label_comment="Comment";
fi


function hilfe () {
# Displays program purpose and usage help.

echo -e "\e[1;33m$TITLE $VERSION \e[0m\n"

if [ "$UILANG" == "Deutsch" ]; then
	echo -e "Das Programm liest die Passwortdatei \"/etc/passwd\" und zeigt ihren Inhalt gut lesbar an.

AUFRUFPARAMETER DER FUNKTION \"$SCRIPT\":
	--help|-h|--hilf  Diese Hilfe anzeigen

BEISPIELAUFRUFE:
	\033[1;32mAufruf         Beschreibung\033[0m

	$SCRIPT root   # Zeigt die Daten aus der passwd zum Account root an. 
	$SCRIPT bs     # Zeigt die Daten zu allen Accounts an, die mit \"bs\" beginnen.		
	$SCRIPT        # Zeigt die Daten aus der Datei passwd zu allen Accounts an.
"
else  # English help:
	echo -e "Reads the password file \"/etc/passwd\" and displays it's content human readable at the screen.

PARAMETERS:
	--help|-h|--hilf  Show this help

EXAMPLES:
	\033[1;32mCall           Description\033[0m

	$SCRIPT root   # Shows information from passwd according to the account \"root\". 
	$SCRIPT bs     # Shows information about all accounts, which do begin with \"bs\".		
	$SCRIPT        # Shows information from file \"passwd\" for all accounts.\n"
fi
}

function printField() {
# Writes pairs of field name and filed content to a temporary file, so
# that the result can be reformatted at the end, when complete.
	echo -e "\t\e[1;37m${2}:\e[0m# ${1}" >> /tmp/parpass.tmp
}

function printNotEmpty() {
	if [ "$1" != "" ]; then
		printField "$1" "$2"
	fi
}

### main ###################
case "$1" in 
	--help|-h|--hilf|-help)
		hilfe
		exit 0
		;;
esac

rm -f /tmp/parpass.tmp

while read -r user trash uid gid data homeDir loginShell
do
if grep -i -q "^$1" <<< "$user" > /dev/null 2>&1; then
	echo -e "\n\e[1;93m${user} \e[0;33m------------------------------------------------\e[0m";
	printField "$uid / $gid" "$label_ID"
	printField "$homeDir" "$label_homeDir"
	printField "$loginShell" "$label_loginShell"

	IFS=','
	read -r realName room workPhone phone comment <<< "$data"
	
	printNotEmpty "$realName" "$label_realName"
	printNotEmpty "$room" "$label_room"
	printNotEmpty "$workPhone" "$label_workPhone"
	printNotEmpty "$phone" "$label_phone"
	printNotEmpty "$comment" "$label_comment"
	IFS=':'
	column -s# -t /tmp/parpass.tmp
	rm /tmp/parpass.tmp
fi
done < "/etc/passwd"

IFS="$OLDIFS"

exit 0