Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Apply file permission
Top Forums Shell Programming and Scripting Apply file permission Post 302661437 by itkamaraj on Monday 25th of June 2012 09:11:03 AM
Old 06-25-2012
Code:
$ chmod 000 a.txt
$ ls -l a.txt | awk -f permission.awk 
000

$ chmod 001 a.txt
$ ls -l a.txt | awk -f permission.awk 
001

$ chmod 031 a.txt
$ ls -l a.txt | awk -f permission.awk 
031

$ cat permission.awk 
function cal(str)
{
    a=0;
    if(str~/r/)
    {
        a+=4;
    }
    if(str~/w/)
    {
        a+=2;
    }
    if(str~/x/)
    {
        a+=1;
    }
}
{
for(i=2;i<=length($1);i=i+3)
{
    cal(substr($1,i,3))
    octal=octal""a;
}
print octal
}

 

10 More Discussions You Might Find Interesting

1. Programming

Apply patch for make file.

I just downloaded a updating make file to build Ethereal to .dll file, but I don't know how to update the old make file with this new one. Please help.. thnx a lot. (1 Reply)
Discussion started by: blueblood
1 Replies

2. Cybersecurity

file permission/acl: 2 users with write access on 1 file...

Hello, i need some help/advice on how to solve a particular problem. these are the users: |name | group | ---------- --------------- |boss | department1 | |assistant | department1 | |employee | department1 | |spy | department2 | this is the... (0 Replies)
Discussion started by: elzalem
0 Replies

3. Shell Programming and Scripting

Apply Password to already Written XLS File.

I need to apply password protection to a xls file.I had looked at SpreadSheet::WriteExcel but problem being i dont want to write the contents of file again as the formatting the file would be a pain. Is there way in which i write a entire file in one go , something like this ... (0 Replies)
Discussion started by: dinjo_jo
0 Replies

4. Shell Programming and Scripting

Re-apply the file permission

Hi, I having an issue with file permission. To fix it I need to read the file's existing permission and re-apply the same permission to the file. This has to be done for every single file under a mount point. I'm novice in scripting. Help me with this in shell scripting. # ls -l /dev/null... (10 Replies)
Discussion started by: agent001
10 Replies

5. UNIX for Dummies Questions & Answers

Do UNIX Permission apply to sub directories?

Hi Guys, Can you tell me if unix permissions apply to sub dirs? Dir is /home/ops/batch/files/all /home is rwxrwxrwx ops is rwxrwxrwx batch is rwxr-wr-w files is rwxrwxrwx all is rwxrwxrwx Having problems writing to all (does the userid nee to be the batch owner... (1 Reply)
Discussion started by: Grueben
1 Replies

6. Shell Programming and Scripting

Apply condition on fixed width file and filter records

Dear members.. I have a fixed width file. Requirement is as below:- 1. Scan each record from this fixed width file 2. Check for value under field no "6" equals to "ABC". If yes, then filter this record into the output file Please suggest a unix command to achieve this, my guess awk might... (6 Replies)
Discussion started by: sureshg_sampat
6 Replies

7. Shell Programming and Scripting

Finding the directories with same permission and then apply some default UNIX commands

HI there. My teacher asked us to write a code for this question Write a Unix shell script named 'mode' that accepts two or more arguments, a file mode, a command and an optional list of parameters and performs the given command with the optional parameters on all files with that given mode. ... (1 Reply)
Discussion started by: femchi
1 Replies

8. Homework & Coursework Questions

Finding the directories with same permission and then apply some default UNIX commands

Write a Unix shell script named 'mode' that accepts two or more arguments, a file mode, a command and an optional list of parameters and performs the given command with the optional parameters on all files with that given mode. For example, mode 644 ls -l should perform the command ls -l on all... (5 Replies)
Discussion started by: femchi
5 Replies

9. Shell Programming and Scripting

Apply md5 hash to a field in csv file

I have a .csv file and I want to md5 hash the second column for each row in the file. File is something like data1,foobar1,123,345 data2,foobar2,456,9393 data3,foobar3,1002,10109 Output would be like data1,6c81243028f8e455fa617dd5f0232ce1,123,345... (3 Replies)
Discussion started by: jjwags
3 Replies

10. Shell Programming and Scripting

Bash to select text and apply it to a selected file in bash

In the bash below I am asking the user for a panel and reading that into bed. Then asking the user for a file and reading that into file1.Is the grep in bold the correct way to apply the selected panel to the file? I am getting a syntax error. Thank you :) ... (4 Replies)
Discussion started by: cmccabe
4 Replies

LEARN ABOUT V7

chmod

CHMOD(1)						      General Commands Manual							  CHMOD(1)

NAME

       chmod - change mode

SYNOPSIS

       chmod mode file ...

DESCRIPTION

       The  mode  of  each  named  file is changed according to mode, which may be absolute or symbolic.  An absolute mode is an octal number con-
       structed from the OR of the following modes:

       4000	 set user ID on execution
       2000	 set group ID on execution
       1000	 sticky bit, see chmod(2)
       0400	 read by owner
       0200	 write by owner
       0100	 execute (search in directory) by owner
       0070	 read, write, execute (search) by group
       0007	 read, write, execute (search) by others

       A symbolic mode has the form:

	      [who] op permission [op permission] ...

       The who part is a combination of the letters u (for user's permissions), g (group) and o (other).  The letter a stands for ugo.	If who	is
       omitted, the default is a but the setting of the file creation mask (see umask(2)) is taken into account.

       Op  can	be + to add permission to the file's mode, - to take away permission and = to assign permission absolutely (all other bits will be
       reset).

       Permission is any combination of the letters r (read), w (write), x (execute), s (set owner or group id) and t (save text - sticky).   Let-
       ters  u,  g or o indicate that permission is to be taken from the current mode.	Omitting permission is only useful with = to take away all
       permissions.

       The first example denies write permission to others, the second makes a file executable:

	      chmod o-w file
	      chmod +x file

       Multiple symbolic modes separated by commas may be given.  Operations are performed in the order specified.  The letter s  is  only  useful
       with u or g.

       Only the owner of a file (or the super-user) may change its mode.

SEE ALSO

       ls(1), chmod(2), chown (1), stat(2), umask(2)

																	  CHMOD(1)
All times are GMT -4. The time now is 07:01 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy