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Full Discussion: CUPS + passwd.md5 issue
Operating Systems Linux Red Hat CUPS + passwd.md5 issue Post 302653279 by Corona688 on Friday 8th of June 2012 03:33:08 PM
Old 06-08-2012
Quote:
Originally Posted by linuxn00b
If I was to just make changes with one user, then everything works as I would expect. Unfortunately, we need to have the ability for multiple users to make changes.
Like I said, lppasswd is usually a setuid executable -- meaning, it would always be running as the same user no matter who called it. Perhaps that's why it's misbehaving.

Two obvious fixes:

1) sudo. Create a sudo rule which allows people in the lp group to call lppasswd as some other user. Doesn't have to be root. Then they do sudo -u username /usr/bin/lppasswd ... and it always runs as the same user.
2) If this is the only thing you use lppasswd for, you could make the lppasswd program setuid(as is traditional). Again, it doesn't have to be owned by root.
Code:
# In case you mess up the program somehow
tar -cf ~/lp-backup.tar /usr/bin/lppasswd
chown cups:lp /usr/bin/lppasswd
chmod u+x /usr/bin/lppasswd

Then it should always be called by the cups user. (Or whichever user you set it as.)
This User Gave Thanks to Corona688 For This Post:
linuxn00b
 

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LEARN ABOUT OSX

lpc

lpc(8)								    Apple Inc.								    lpc(8)

NAME

       lpc - line printer control program

SYNOPSIS

       lpc [ command [ parameter(s) ] ]

DESCRIPTION

       lpc provides limited control over printer and class queues provided by CUPS. It can also be used to query the state of queues.

       If no command is specified on the command-line, lpc will display a prompt and accept commands from the standard input.

COMMANDS

       The lpc program accepts a subset of commands accepted by the Berkeley lpc program of the same name:

       exit
	    Exits the command interpreter.

       help [command]

       ? [command]
	    Displays a short help message.

       quit
	    Exits the command interpreter.

       status [queue]
	    Displays the status of one or more printer or class queues.

LIMITATIONS

       Since  lpc  is  geared  towards	the Berkeley printing system, it is impossible to use lpc to configure printer or class queues provided by
       CUPS.  To configure printer or class queues you must use the lpadmin(8) command or another CUPS-compatible client with that functionality.

COMPATIBILITY

       The CUPS version of lpc does not implement all of the standard Berkeley or LPRng commands.

SEE ALSO

       cancel(1), cupsaccept(8), cupsenable(8), lp(1), lpr(1), lprm(1), lpstat(1),
       http://localhost:631/help

COPYRIGHT

       Copyright 2007-2013 by Apple Inc.

3 November 2008 						       CUPS								    lpc(8)
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