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Full Discussion: ...yet another string of awk/sed questions from a RegExp-Challenged luser %-\
Top Forums Shell Programming and Scripting ...yet another string of awk/sed questions from a RegExp-Challenged luser %-\ Post 302358500 by cfajohnson on Friday 2nd of October 2009 06:37:04 PM
Old 10-02-2009
Quote:
Originally Posted by Scrutinizer
Nice puzzle, Steve. This works in ksh. Do you have that on your system?

If you use [ -n "$var" ] instead of [[ $var != "" ]], the script will work in any shell.
Quote:

Code:
#!/bin/ksh
{ sed '/masks/ s/^/\n/'  infile | sed 's/^\([CDS]\) \(.*\)$/\2 \1/' |\


Why two calls to sed?

Code:
sed -e '/masks/ s/^/\n/' -e 's/^\([CDS]\) \(.*\)$/\2 \1/' infile

Quote:

The sort statement is very implementation dependent. This syntax is for GNU sort.

That is POSIX sort which most systems now have; that means your sort code will work almost everywhere.
 

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LEARN ABOUT LINUX

ctluser

CTLUSER(8)						      System Manager's Manual							CTLUSER(8)

NAME

       ctluser - control lusers

SYNOPSIS

       ctluser [ -h ] [ -m ] command [ argument...  ]

DESCRIPTION

       Ctluser sends a message to the control channel of a given luser(8) This command can only be run by the sysadmin(1)

       In  the	normal mode of behavior, the message is sent to the luser's brain, which then performs the requested action and sends back a reply
       with a text message and the exit code for ctluser.  If the luser's brain successfully performed the command, ctluser will exit with a  sta-
       tus of zero and print the reply on standard output.

       The  ``-m''  flag  is used to display an MPEG of the results of the given command on the console of the sysadmin(1) Note that this requires
       the sysadmin(1) to be running an X server.

       To see a command summary, use the ``-h'' flag.  If a command is included when ctluser is invoked with the ``-h'' flag, then only the  usage
       for that command will be given.

       The  complete  list  of commands follows.  Note that all commands have a fixed number of arguments.  If a parameter can be an empty string,
       then it is necessary to specify it as two adjacent quotes, like "".

       addhist <entry>
	      Add an entry to the luser's employment record.

       allow reason
	      Allow a luser to use the computer system again.  The reason must be the same text given with an earlier  ``reject''  command.   Note
	      that this command is currently not implemented.

       begin name
	      Begin a new luser(1) with the given file.  Note that this command is currently not implemented.

       cancel pid
	      Causes a process of a luser to be killed

       changegroup group
	      Changes a luser from their current workgroup to the one specified.

       checkfile
	      Forces a user to return to a paper based system

       drop   Causes a large mass to drop onto the luser from a great height.

       flushlogs
	      Destorys all logs of the actions done by the sysadmin(1) to the luser.

       go reason
	      The luser is fired for the given reason.

       hangup Makes the luser hang themselves

       mode   Displays the operating mode of the luser

       newgroup group
	      Causes a luser to make their own newgroup up

       pause thought
	      Makes the luser pause for the given thought.  Note that this may cause some lusers to crash

       shutdown reason
	      Makes the luser shutdown. This is essentially the same as killing them

       signal sig
	      Sends the given signal to the luser

       throttle reason
	      Causes the luser to throttle themselves

       trace item flag
	      Gives the sysadmin(1) information on what the luser is doing.

BUGS

       Ctluser sometimes has the effect of lusers complaining the to management. The use of bosskill(8) maybe required at this point.

HISTORY

       Written by Simon Burr <simes@tcp.co.uk>. Based upon the manual page for ctlinnd(8), part of the InterNetNews system.

SEE ALSO

       luser(1), sysadmin(1), bosskill(8)

								  19 October 1995							CTLUSER(8)
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