#!/bin/sh

set -e

cd $(dirname $0)

# Rational:
# Test the -u option of useradd (we can specify the new user UID)
# Check that we can't create an user with the same UID without the -o
# option.

save()
{
	[ ! -d tmp ] && mkdir tmp
	for i in passwd group shadow gshadow
	do
		[ -f /etc/$i  ] && cp /etc/$i  tmp/$i
	done

	true
}

restore()
{
	for i in passwd group shadow gshadow
	do
		[ -f tmp/$i  ] && cp tmp/$i  /etc/$i  && rm tmp/$i
	done
	rmdir tmp
}

save

# restore the files on exit
trap 'restore' 0

cp data/{passwd,shadow,group,gshadow} /etc/

lines_passwd=$(wc -l /etc/passwd | cut -f1 -d" ")
lines_shadow=$(wc -l /etc/shadow | cut -f1 -d" ")
lines_group=$(wc -l /etc/group | cut -f1 -d" ")
lines_gshadow=$(wc -l /etc/gshadow | cut -f1 -d" ")

echo -n "Create user test4..."
useradd -u 4242 test4
echo "OK"

echo "test if the user was added with the right uid"
echo -n "  passwd..."
getent passwd test4 |
	egrep "^test4:x:4242:4242::/home/test4:/bin/sh$"
echo "  OK"
echo -n "  group..."
getent group test4 | egrep "^test4:x:4242:$"
echo "  OK"
echo -n "  shadow..."
getent shadow test4 | egrep "^test4:!:[0-9]+:0:99999:7:::$"
echo "  OK"
echo -n "  gshadow..."
egrep "^test4:!::$" /etc/gshadow
echo "  OK"
# the home directory should not exist
echo -n "  no homedir..."
test -d /home/test4 && exit 1 || true
echo "  OK"
echo -n "  number of lines"
test $(( lines_passwd  + 1 )) = $(wc -l /etc/passwd | cut -f1 -d" ")
echo -n "."
test $(( lines_group   + 1 )) = $(wc -l /etc/group | cut -f1 -d" ")
echo -n "."
test $(( lines_shadow  + 1 )) = $(wc -l /etc/shadow | cut -f1 -d" ")
echo -n "."
test $(( lines_gshadow + 1 )) = $(wc -l /etc/gshadow | cut -f1 -d" ")
echo -n "."
echo "  OK"

echo "do NOT delete this user"

echo -n "Create user test5 with the same uid..."
useradd -u 4242 test5 && exit 1 || true
echo "All right, useradd return an error."

echo "This user should not exist"
echo -n "  no entries..."
egrep "^test5:" \
      /etc/passwd /etc/group /etc/shadow /etc/gshadow && exit 1 || true
echo "  OK"
echo -n "  no homedir..."
test -d /home/test5 && exit 1 || true
echo "  OK"
echo -n "  number of lines"
test $(( lines_passwd  + 1 )) = $(wc -l /etc/passwd | cut -f1 -d" ")
echo -n "."
test $(( lines_group   + 1 )) = $(wc -l /etc/group | cut -f1 -d" ")
echo -n "."
test $(( lines_shadow  + 1 )) = $(wc -l /etc/shadow | cut -f1 -d" ")
echo -n "."
test $(( lines_gshadow + 1 )) = $(wc -l /etc/gshadow | cut -f1 -d" ")
echo -n "."
echo "  OK"

echo -n "Create user test6 with the same uid..."
useradd -o -u 4242 test6
echo "OK"

echo "test if the user was added with the right uid"
echo -n "  passwd..."
getent passwd test6 |
	egrep "^test6:x:4242:4243::/home/test6:/bin/sh$"
echo "  OK"
echo -n "  group..."
getent group test6 | egrep "^test6:x:4243:$"
echo "  OK"
echo -n "  shadow..."
getent shadow test6 | egrep "^test6:!:[0-9]+:0:99999:7:::$"
echo "  OK"
echo -n "  gshadow..."
egrep "^test6:!::$" /etc/gshadow
echo "  OK"
# the home directory should not exist
echo -n "  no homedir..."
test -d /home/test6 && exit 1 || true
echo "  OK"
echo -n "  number of lines"
test $(( lines_passwd  + 2 )) = $(wc -l /etc/passwd | cut -f1 -d" ")
echo -n "."
test $(( lines_group   + 2 )) = $(wc -l /etc/group | cut -f1 -d" ")
echo -n "."
test $(( lines_shadow  + 2 )) = $(wc -l /etc/shadow | cut -f1 -d" ")
echo -n "."
test $(( lines_gshadow + 2 )) = $(wc -l /etc/gshadow | cut -f1 -d" ")
echo -n "."
echo "  OK"

echo -n "delete user test4..."
userdel test4
echo "OK"

echo "check if the user was deleted"
echo -n "  no entries..."
egrep "^test4:" \
      /etc/passwd /etc/group /etc/shadow /etc/gshadow && exit 1 || true
echo "  OK"
echo -n "  no homedir..."
test -d /home/test4 && exit 1 || true
echo "  OK"
echo -n "  number of lines"
test $(( lines_passwd  + 1 )) = $(wc -l /etc/passwd | cut -f1 -d" ")
echo -n "."
test $(( lines_group   + 1 )) = $(wc -l /etc/group | cut -f1 -d" ")
echo -n "."
test $(( lines_shadow  + 1 )) = $(wc -l /etc/shadow | cut -f1 -d" ")
echo -n "."
test $(( lines_gshadow + 1 )) = $(wc -l /etc/gshadow | cut -f1 -d" ")
echo -n "."
echo "  OK"

echo -n "delete user test6..."
userdel test6
echo "OK"

echo "check if the user was deleted"
echo -n "  no entries..."
egrep "^test6:" \
      /etc/passwd /etc/group /etc/shadow /etc/gshadow && exit 1 || true
echo "  OK"
echo -n "  no homedir..."
test -d /home/test6 && exit 1 || true
echo "  OK"
echo -n "  number of lines"
test $lines_passwd  = $(wc -l /etc/passwd | cut -f1 -d" ")
echo -n "."
test $lines_group   = $(wc -l /etc/group | cut -f1 -d" ")
echo -n "."
test $lines_shadow  = $(wc -l /etc/shadow | cut -f1 -d" ")
echo -n "."
test $lines_gshadow = $(wc -l /etc/gshadow | cut -f1 -d" ")
echo -n "."
echo "  OK"