changing permissions of a file whos name was passed to 755 Post: 302398451

Sponsored Content

Homework and Emergencies Homework & Coursework Questions changing permissions of a file whos name was passed to 755 Post 302398451 by methyl on Wednesday 24th of February 2010 05:02:46 PM

02-24-2010

Registered User

Some clues to get you started.

If an executable script called "myscript" was invoked from the command line as

Code:

./myscript myfilename 755

we can save the parameters into named environment variables called say filename from $1 and the permissions parameter (755) from $2.

Code:

filename="$1"
echo "The first parameter is: ${filename}"
perms="$2"
echo "The second parameter is: ${perms}"

If we want to find out the current directory listing for the file myfile we can extend the script by one line. Any line starting with a hash character (#) a comment line and will be ignored by the shell.

Code:

filename="$1"
echo "The first parameter is: ${filename}"
perms="$2"
echo "The second parameter is: ${perms}"
# Directory listing for file called myfile
ls -la "${filename}"

Now we understand script parameters, we can take the saved $2 (now called ${perms} ) and substitute it into a unix chmod command.

Your turn!

Last edited by methyl; 02-24-2010 at 06:16 PM.. Reason: After discussion with colleagues decided to put 755 on the command call to point the way.

methyl

View Public Profile for methyl

Find all posts by methyl

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

changing file permissions

Use the following to Change permission of fileB (fileB could be fileB*) to change its permission same as the permission of fileA. chmod `ls -l fileA | awk '{pr int "u+", substr($1,2,1), substr($1,3,1), substr($1,4,1), ",g+", substr($1,5,1), substr($1,6,1), substr($1,7,1), ",o+",...

2. Shell Programming and Scripting

Changing Permissions

Is it possible to change the permissons for an entire directory in one shot? I'm telneting on to a linux server. ...just a beginner-- --Paul

3. UNIX for Advanced & Expert Users

Changing file permissions on upload

Hello ! When I connect to a RH FTP server, the files I transfer (from my "windows computer") to this server have the following permissions : -rw------- but I would like those files to have the following permissions : - rw-rw-r-x How can I do that ??? :) Thanks for your help ! G.

4. UNIX for Dummies Questions & Answers

changing default file permissions

How can I change the default permissions that are assigned when I create a file? (By default the file has: -rw-r--r-- ..... I'd like it to be -rw-r----- How can I change this default behavior?

5. UNIX for Dummies Questions & Answers

Changing file permissions

Is there a way to change a unix user's default file permissions so that when he creates a file, by default permissions are 777??? Thanks!

6. UNIX for Dummies Questions & Answers

changing permissions on a 444 file (ie chmod 444)

if I have a file set to permisions 444 (r-- r-- r--) should anyone other than the owner and root be able to change these permissions or delete the file. Apologies if this is a no-brainer but I cant test it myself and someone in our organisation is playin around with files they shouldnt be

7. Cybersecurity

changing /cn@0:console file permissions

I'm doing a security sweep of a Sun Sol 5.8 system. The file: /dev/console, which links to /devices/pseudo/cn@0:console, has the following perms: crw--w--w- I would like to get rid of the world write permissions. I can change the file permissions, but as soon as log back in, they are changed...

8. Shell Programming and Scripting

HELP changing file permissions

does anyone know how to write a script that will change file permissions. because the Admin blocked me from altering any of my files im only allowed to read and i heard a script like this can bypass it but i dont know how to write it. Display current users. Display user Ids only. Display...

9. Homework & Coursework Questions

changing permissions of a file whos name was passed to 755

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Write a shell script that gives a passed file the "755" access permissions. The shell script should: Change...

10. Shell Programming and Scripting

Changing file permissions of a file created by another user

Hi, I have used expdp for datapump. The .dmp file is created by the "oracle" user. my requirement is to make a zipped file of this .dmp file. What i am trying to do is change the permissions of this .dmp file from 0640 to 0644 and then do a gzip and zip it. Is there any way i can change...

LEARN ABOUT CENTOS

mkdtemp

MKDTEMP(3)						     Linux Programmer's Manual							MKDTEMP(3)

NAME

       mkdtemp - create a unique temporary directory

SYNOPSIS

       #include <stdlib.h>

       char *mkdtemp(char *template);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       mkdtemp():
	   _BSD_SOURCE
	   || /* Since glibc 2.10: */
	       (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)

DESCRIPTION

       The  mkdtemp()  function  generates a uniquely named temporary directory from template.	The last six characters of template must be XXXXXX
       and these are replaced with a string that makes the directory name unique.  The directory is then created with permissions 0700.  Since	it
       will be modified, template must not be a string constant, but should be declared as a character array.

RETURN VALUE

       The mkdtemp() function returns a pointer to the modified template string on success, and NULL on failure, in which case errno is set appro-
       priately.

ERRORS

       EINVAL The last six characters of template were not XXXXXX.  Now template is unchanged.

       Also see mkdir(2) for other possible values for errno.

VERSIONS

       Available since glibc 2.1.91.

CONFORMING TO

       POSIX.1-2008.  This function is present on the BSDs.

SEE ALSO

       mkdir(2), mkstemp(3), mktemp(3), tempnam(3), tmpfile(3), tmpnam(3)

COLOPHON

       This page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2010-09-26								MKDTEMP(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

changing file permissions

Discussion started by: gagansharma

2. Shell Programming and Scripting

Changing Permissions

Discussion started by: pdavid

3. UNIX for Advanced & Expert Users

Changing file permissions on upload

Discussion started by: guix

4. UNIX for Dummies Questions & Answers

changing default file permissions

Discussion started by: FredSmith

5. UNIX for Dummies Questions & Answers

Changing file permissions

Discussion started by: FredSmith

6. UNIX for Dummies Questions & Answers

changing permissions on a 444 file (ie chmod 444)

Discussion started by: ajcannon

7. Cybersecurity

changing /cn@0:console file permissions

Discussion started by: ErnieG

8. Shell Programming and Scripting

HELP changing file permissions

Discussion started by: live2learn

9. Homework & Coursework Questions

changing permissions of a file whos name was passed to 755

Discussion started by: anix007

10. Shell Programming and Scripting

Changing file permissions of a file created by another user

Discussion started by: qwertyu

LEARN ABOUT CENTOS

mkdtemp