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Posted By

mladoux on 06/12/11


Tagged

system administration utility admin


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ls octal chmod out

 / Published in: Awk
 

Simple script to output chmod permissions in octal. Good for learning environments, and security troubleshooting. I didn't write this one, I picked up from a friend and he didn't write it either.

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  1. #!/bin/sh
  2.  
  3. ls -l | awk '{
  4.     k = 0
  5.     s = 0
  6.     for( i = 0; i <= 8; i++ )
  7.     {
  8.         k += ( ( substr( $1, i+2, 1 ) ~ /[rwxst]/ ) * 2 ^( 8 - i ) )
  9.     }
  10.     j = 4 
  11.     for( i = 4; i <= 10; i += 3 )
  12.     {
  13.         s += ( ( substr( $1, i, 1 ) ~ /[stST]/ ) * j )
  14.         j/=2
  15.     }
  16.     if ( k )
  17.     {
  18.         printf( "%0o%0o ", s, k )
  19.     }
  20.     print
  21. }'

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