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Full Discussion: help with !(tail -2) command.. using pipes
Top Forums UNIX for Advanced & Expert Users help with !(tail -2) command.. using pipes Post 62356 by sdlayeeq on Tuesday 15th of February 2005 10:31:37 AM
Old 02-15-2005
Network help with !(tail -2) command.. using pipes
I am trying to using pipe (|) with ! (not) operator to list all the other files except the latest two and I am using the following command.

$ ls -ltr *.lst|!(tail -2)
ksh: 20050211180252.lst: cannot execute

but it is trying to execute the file returned by tail -2. I am able to do that in 4 steps

1) ls -ltr *.lst > listfile
2) numberoflines=`wc -l | cut -d" "`
3) ((numberoflines = numberoflines - 2))
4) head -$numberoflines > final_list.

Are there any Unix gurus who could help me write the above commands using pipe facility. I am using Korn shell.

thanks in advance
 

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LEARN ABOUT OPENSOLARIS

pfsh

pfexec(1)							   User Commands							 pfexec(1)

NAME

       pfexec, pfsh, pfcsh, pfksh - execute a command in a profile

SYNOPSIS

       /usr/bin/pfexec command

       /usr/bin/pfexec -P privspec command [ arg ]...

       /usr/bin/pfsh [ options ] [ argument ]...

       /usr/bin/pfcsh [ options ] [ argument ]...

       /usr/bin/pfksh [ options ] [ argument ]...

DESCRIPTION

       The  pfexec  program  is  used to execute commands with the attributes specified by the user's profiles in the exec_attr(4) database. It is
       invoked by the profile shells, pfsh, pfcsh, and pfksh which are linked to the Bourne shell, C shell, and Korn shell, respectively.

       Profiles are searched in the order specified in the user's entry in the user_attr(4) database. If the same command appears in more than one
       profile, the profile shell uses the first matching entry.

       The  second form, pfexec -P privspec, allows a user to obtain the additional privileges awarded to the user's profiles in prof_attr(4). The
       privileges specification on the commands line is parsed using priv_str_to_set(3C). The resulting privileges are intersected with the  union
       of  the	privileges specified using the "privs" keyword in prof_attr(4) for all the user's profiles and added to the inheritable set before
       executing the command.

USAGE

       pfexec is used to execute commands with predefined process attributes,  such as specific user or group IDs.

       Refer to the sh(1), csh(1), and ksh(1) man pages for complete usage descriptions of the profile shells.

EXAMPLES

       Example 1 Obtaining additional user privileges

	 example% pfexec -P all chown user file

       This command runs chown user file with all privileges assigned to the current user, not necessarily all privileges.

EXIT STATUS

       The following exit values are returned:

       0     Successful completion.

       1     An error occurred.

ATTRIBUTES

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

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

SEE ALSO

       csh(1), ksh(1), profiles(1), sh(1), exec_attr(4), prof_attr(4), user_attr(4), attributes(5)

SunOS 5.11							    3 Mar 2003								 pfexec(1)
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