LinuxQuestions.org - Best approach with this script

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- - Best approach with this script (https://www.linuxquestions.org/questions/linux-newbie-8/best-approach-with-this-script-451913/)

Quote:

Originally Posted by timmeke

Code:

user=`whoami`;

echo "Current user is: $user";

should do it.
whoami prints the eUID (effective User ID). So, when you "su" to impersonate someone else, the whoami output changes too.

To get the name of the user who owns the file, is slightly different.
You can use your version of "stat" to get the UID and username (if available) (cfr your post of "man stat").

Hi m8,

Thanks for the Info, I need to insert the name on the same line as OWNER so what I plan to do is create a variable based on UID and then in my first SED substitution instead of getting rid of the first "-" regular file symbol of the output from ls -l completely I will replace I it with the variable, that way its on the right line to start with and my second AWK print can be{print "OWNER " $1, $2, $3, $4 }and should look like this.

OWNER $OWNER_VAR YES YES NO

Thanks for the info.

Mike

Hi temmeke, took your advice and came up with this script:

Code:

#!/bin/sh

# script to determine permission that owner, group

# and everybody has of a file passed to it

USER=`whoami`

echo "Hello $USER, which file would you like to see permissions on?"

read FILE

stat $FILE |

awk '/Uid:/ {print $2, $5}' |

sed -e 's/[0-9]//g;s/)//g;s/\///g;s/(//g; #Extract Uid and permissions

s/-//1;                                  #then convert permissions

1,9s/x/YES /g;                            #into readable form

1,9s/w/YES /g;                            #and pipe to AWK

1,9s/-/NO /g;                            #to format fields

1,9s/r/YES /g' |                          #and display relevant output

awk 'BEGIN {print "                            READ\t WRITE\t EXECUTE" "\n"}

{print "OWNER  "$10,      "            "$2"\t",$3"\t",$4"\t"}

{print "GROUP  USERS                  "$4"\t",$5"\t",$6"\t"}

{print "EVERYBODY                      "$7"\t",$8"\t",$9"\n"}'

and now I get this

Code:



Hello michael.kelly, which file would you like to see permissions on?

file

                                READ    WRITE  EXECUTE



OWNER  michael.kelly          YES      YES    YES

GROUP  USERS                  YES      NO      YES

EVERYBODY                      YES      NO      YES



[michael.kelly@unix michael.kelly]$

:cool:
Not bad for a n00b who couldnt even append a line of text to a file a week ago eh?

Works fine, thanks for you help!

Mike