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Full Discussion: Ksh: run commands from pipe
Top Forums Shell Programming and Scripting Ksh: run commands from pipe Post 302921118 by Cochise on Wednesday 15th of October 2014 03:52:05 AM
Old 10-15-2014
For better understanding of my problem, here is the long story:

I have a large log file, that has some lines like this:
Code:
skipping: /usr/bin/chuser "gecos=ipsec;MDE0M819;;F" ipsec (TESTMODE)
skipping: /usr/bin/chuser "gecos=nobody;MDE0M819;;F" nobody (TESTMODE)
skipping: /usr/bin/chuser "gecos=perfmgr;MDE0M819;;F" perfmgr (TESTMODE)

The lines may occur multiple times.

I want to find these lines, remove duplicates, strip off "skipping:" and "(TESTMODE)" and then execute the remainining chuser command.

What I have built is this:
Code:
grep 'chuser "gecos=' modify.LOG|sort|uniq|sed 's/skipping: //; s/ (TESTMODE)//'|ksh

This works and is what I asked for.

New question: I would like to have the command string displayed on the terminal before it is send to ksh for execution.
Is there a smarter and shorter way than doing it in a do loop like below?

Code:
grep 'chuser "gecos=' modify.LOG|sort|uniq|sed 's/skipping: //; s/ (TESTMODE)//'|while read line;do print - $line;ksh "$line";done

 

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LEARN ABOUT OPENSOLARIS

endusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

	 /bin/bash		    /bin/csh
	 /bin/jsh		    /bin/ksh
	 /bin/ksh93		    /bin/pfcsh
	 /bin/pfksh		    /bin/pfsh
	 /bin/sh		    /bin/tcsh
	 /bin/zsh		    /sbin/jsh
	 /sbin/pfsh		    /sbin/sh
	 /usr/bin/bash		    /usr/bin/csh
	 /usr/bin/jsh		    /usr/bin/ksh
	 /usr/bin/ksh93 	    /usr/bin/pfcsh
	 /usr/bin/pfksh 	    /usr/bin/pfsh
	 /usr/bin/sh		    /usr/bin/tcsh
	 /usr/bin/zsh		    /usr/sfw/bin/zsh
	 /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

NOTES

       Restricted shells should not be listed in /etc/shells.

SunOS 5.11							    1 Nov 2007							  getusershell(3C)
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