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Full Discussion: Reading ls -l output line by line awk the user name and su user to run commands
Top Forums Shell Programming and Scripting Reading ls -l output line by line awk the user name and su user to run commands Post 302872115 by zubairom on Thursday 7th of November 2013 05:00:21 PM
Old 11-07-2013
IBM Reading ls -l output line by line awk the user name and su user to run commands
Using ksh on AIX what I am trying to do is to read the ls -l output from a file in a do while loop line by line. Extract the user name(3rd field) and the directory/file name(9th field) using awk and save them into variables. su -c to the user and change directory/file permisions to 777. Script I wrote is

Code:
#!/bin/ksh

cd /saswork/sastemp
ls -ltr  | egrep -i -v 'total [0-9]+' > /u/sasp/scripts/purge_clean/test_list
 
while read line 
do
   # su the owner of each work directory and change permisions to 777 for the work directory
    
      
        sas_user=`awk '{print $3}'`
        sas_work_dir=`awk '{print $9}'`
        echo $sas_user 
         echo $sas_work_dir 
       su $sas_user -c "whoami; cd /saswork/sastemp; chmod 777 $sas_work_dir"
done < /u/sasp/scripts/purge_clean/test_list

However the problem is that it seems like that once the first awk is executed all iterations of do while are done within first awk sub shell? as it gives me all user Ids in one line (return the value in sas_user variable), output from second awk is blank as it looks like it has nothing to process? and then it tries to su all the user ids at a time and su gives error.

What I expected it to do was to awk the user Id and D/F name for first row in the ls -l output, su -c the first user to change the permisons and then go to next line of ls -l , process it the same way and keep doing it till it has read all lines from ls -l output. This is why I used a do while loop reading file line by line. If I wanted the awk to process all lines in ls -l output together I could have just piped the ls -l output to awk...

following is what I get when I run the script as root

Code:
root:/u/sasp/scripts/purge_clean]./test_su4
dsm04 dsm04 sasp omecea hbharuch hbharuch mdu vsingh dsm04 vsingh ssun sli yyao aaronwne ssun dsm01 ssun sli yyao alawson vfan vsethi vneto twang yyao vneto szhi szhi mdu
ksh: dsm04:  not found.

if I run the script as non-root user then I get

s
Code:
asp:/u/sasp/scripts/purge_clean]test_su4
dsm04 dsm04 sasp omecea hbharuch hbharuch mdu vsingh dsm04 vsingh ssun sli yyao aaronwne ssun dsm01 ssun sli yyao alawson vfan vsethi vneto twang yyao vneto szhi szhi mdu
dsm04's Password:

Any help would be greatly appreciated
Last edited by Scrutinizer; 11-07-2013 at 06:22 PM.. Reason: code tags
 

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LEARN ABOUT OPENSOLARIS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

ATTRIBUTES

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

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgawk	      |
       +--------------------+-----------------+
       |Interface Stability | Volatile	      |
       +--------------------+-----------------+
NOTES

       Source for gawk is available on http://opensolaris.org.

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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