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Full Discussion: appending LK to the shadow file
Top Forums Shell Programming and Scripting appending LK to the shadow file Post 302242198 by musicmancanora on Wednesday 1st of October 2008 11:06:58 AM
Old 10-01-2008
appending LK to the shadow file
Hey guys..

i need to be able to append 'LK' to a password field in the shadow file


I cannot use commands such as usermod chsh i need to directly be able to manupilate the files through a menu driven interface. So in other words write to the shadow file

How could i do this?

so far below i have written up a menu and a function module but have no idea what to do from there to append LK to a particular user by writing the LK to the shadow file

Code:
#!/bin/bash
MENUSTRING1="==================================="
MENUSTRING2="---------------------------------"

function DisplayMenu()
{
 
 echo "$MENUSTRING1"
 echo "$MENUSTRING2"
 echo "Select an option from the menu"
 echo "$MENUSTRING2"
 echo "$MENUSTRING1"

 echo "[1] Lock an account by prepending LK to the password field in etc/shadow"
 echo "[2] Force a change of password by mod password expiry and grace period"
 echo         "so that the user has at least 1 week to login and change the password"
 echo "[3] Set an account so that it expires at a particular date"
 echo "[4] set a new password(using passwd)For this purpose, a modified version"
 echo      "of passwd that takes two extra arguments will be supplied"
 echo      "since the real passwd requires superuser privileges to run."
 echo "[5] Change the home directory path for a user"
 echo "[6] Change the default shell for a user"
 echo "[7] EXIT" 
 
}

function menuInput()
{

  read USERCHOICE
 echo "Executing your selected option"
 
 if [ $USERCHOICE -eq 1 ]; then
 echo "you have chosen to lock the account using the shadow file"
 lockAccount

 else
 echo Unkown Option $USERHCOICE
 fi

}

function lockAccount()
{
  echo "Successfully locked the account"
}

DisplayMenu
menuInput

 

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LEARN ABOUT OPENDARWIN

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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