While loop running after reaching limit Post: 302586022

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Top Forums Shell Programming and Scripting While loop running after reaching limit Post 302586022 by Vaibhav.T on Friday 30th of December 2011 02:12:40 AM

12-30-2011

Registered User

While loop running after reaching limit

Hi frnds

i am newbie in linux and trying to write a simple script for adding users.the problem is i am running a while loop under function and loop is running for 3 time more than limit.Here is my Script and output pls help me out :

Code:

 # CREATE N NO. OF USERS WITH PASSWORD IN SYSTEM



# ./users to run the script

# CREATE A FUNCTION CALLED ADD()

ADD ()

{

   while [ $i  -le $no ]

      do
          echo -e " Please enter the user name :\t\c"
          read USER

#  Search in /etc/passwd file for user existence

          output=`cat /etc/passwd | grep $USER | cut -d: -f1`


            if [ "$output" = "$USER" ]

            then

    echo " Opps ! $USER is already exist Please Enter again"


## Call ADD Function in case of User already exist

                  ADD
            fi

           useradd $USER

          echo -e " Please enter the Password of the user :\t\c"

          read PASSWD

          echo $PASSWD | passwd --stdin $USER

echo "$USER creates successfully"

          i=`expr $i + 1`


done

}


clear

echo -e " Please Enter How many users want to create :\t\c"

read no

i=1


# Call ADD Function

ADD

OUTPUT of Script :

Code:

 Please Enter How many users want to create :    2
 Please enter the user name :    viv

 Opps ! viv is already exist Please Enter again

 Please enter the user name :    vishnu
 Opps ! vishnu is already exist Please Enter again

 Please enter the user name :    ram
useradd: user 'ram' already exists
 Please enter the Password of the user :    kev

Changing password for user ram.
passwd: all authentication tokens updated successfully.
ram creates successfully

 Please enter the user name :    john
 Please enter the Password of the user :    john
Changing password for user john.
passwd: all authentication tokens updated successfully.
john creates successfully

useradd: user 'john' already exists
 Please enter the Password of the user :    john
Changing password for user john.
passwd: all authentication tokens updated successfully.
john creates successfully

useradd: user 'john' already exists
 Please enter the Password of the user :    jhon
Changing password for user john.
passwd: all authentication tokens updated successfully.
john creates successfully
[root@Riyansh Scripts]#

pls help me out

thanks

vaibhav

Last edited by methyl; 12-30-2011 at 06:31 AM.. Reason: please use code tags when posting code or data

Vaibhav.T

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LEARN ABOUT OSX

pwconv

pwconv(1M)                                                System Administration Commands                                                pwconv(1M)

NAME

       pwconv - installs and updates /etc/shadow with information from /etc/passwd

SYNOPSIS

       pwconv

DESCRIPTION

       The pwconv command creates and updates /etc/shadow with information from /etc/passwd.

       pwconv relies on a special value of 'x' in the password field of /etc/passwd. This value of 'x' indicates that the password for the user is
       already in /etc/shadow and should not be modified.

       If the /etc/shadow file does not exist, this command will create /etc/shadow with  information  from  /etc/passwd.  The  command  populates
       /etc/shadow  with  the  user's  login  name,  password,  and  password  aging  information. If password aging information does not exist in
       /etc/passwd for a given user, none will be added to  /etc/shadow. However, the last changed information will always be updated.

       If the  /etc/shadow file does exist, the following tasks will be performed:

                Entries that are in the  /etc/passwd file and not in the /etc/shadow file will be added to the /etc/shadow file.

                Entries that are in the  /etc/shadow file and not in the /etc/passwd file will be removed from /etc/shadow.

                Password attributes (for example, password and aging information)  that exist in an /etc/passwd entry will be moved to the  corre-
                sponding entry in  /etc/shadow.

       The pwconv command can only be used by the super-user.

FILES

       /etc/opasswd

       /etc/oshadow

       /etc/passwd

       /etc/shadow

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       passwd(1), passmgmt(1M), usermod(1M), passwd(4), attributes(5)

DIAGNOSTICS

       pwconv exits with one of the following values:

       0        SUCCESS.

       1        Permission denied.

       2        Invalid command syntax.

       3        Unexpected failure.  Conversion not done.

       4        Unexpected failure.  Password file(s) missing.

       5        Password file(s) busy.  Try again later.

       6        Bad entry in /etc/shadow file.

SunOS 5.10                                                          9 Mar 1993                                                          pwconv(1M)

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