adduser.sh

Solaris环境下Shell编程编程

#!/bin/sh

# Purpose: To write a script to add user to the system.
# Name: adduser.sh


# Check for only a single command line argument
if [ $# -ne 1 ] 
then
	echo "Usage: adduser newusername"
	exit 1
fi


# Assign the value of $1 to the variable name
name=$1

if grep "^$name:" ./mypasswd > /dev/null 2>&1
then
        echo "The username $1 is already in use, here "
        echo "is the entry from the ,/mypasswd file."
        echo
        grep "^$name:" ./mypasswd
        exit 2
fi



# Use nawk to extract all the UIDs into the temp file currentuid
nawk -F: '{print $3}' ./mypasswd > ./currentuid

# Use sed to remove all 1, 2, and 3 digit UIDs from currentuid, and
# place the output in the temp file currentuid2
sed -e '/^.$/d' -e '/^..$/d' -e '/^...$/d'  ./currentuid > ./currentuid2


# Use sed to remove UIDs 60001, 60002, and 65534 from currentuid2,
# and place the output in the temp file currentuid3
sed -e '/^6000[12]$/d' -e '/^65534$/d'  ./currentuid2 > ./currentuid3



# Sort the UIDs in currentuid3 numerically
sort -n ./currentuid3 > ./currentuid4

# Calculate the next available UID
lastuid=`sed -n '$p' ./currentuid4`

uid=`expr $lastuid + 1`
echo "The uid for $name is: $uid"