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Unix File Access Right

 
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# 8  
Old 10-05-2011
Unix File Access Right
Linux sitelinux32 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
# 9  
Old 10-05-2011
Hi, have a look at: man getfacl and man setfacl
# 10  
Old 10-05-2011
Unix File Access Right
This is my getfacl
# file: _fsrt3
# owner: jessy
# group: jessy
user::rw-
group::r--
mask::rwx
other::r--

1. When i try to setfacl -b _fsrt3, the + sign is still there, how am i going to get rid of the + sign?

2.Besides, how am i going to modify those user, group and other also? i mean the syntax of command like setfacl -m user::jessy group:: xxxxxx ?

3. What does the mask means for?
# 11  
Old 10-06-2011
1. try setfacl -k _fsrt3

2. you can still change ownership and group ownership and permissions using chown and chmod

3. the mask shows what permissions are allowed for this file, rwx means you are able to set all permissions on the file. if it was set to r-x you could tell the file to use mask defaults to disble write to the file/directory. In this instance it doesn't affect the permissions of the file.
# 12  
Old 10-07-2011
I try setfacl -k filament. It still can't work for me.
# 13  
Old 10-07-2011
Quote:
Originally Posted by Tommyk
1. try setfacl -k _fsrt3

2. you can still change ownership and group ownership and permissions using chown and chmod

3. the mask shows what permissions are allowed for this file, rwx means you are able to set all permissions on the file. if it was set to r-x you could tell the file to use mask defaults to disble write to the file/directory. In this instance it doesn't affect the permissions of the file.
1-)
Code:
# setfacl -b infile

Code:
-b, --remove-all
           Remove all extended ACL entries. The base ACL entries  of  the

owner,
group and others are retained.

2 && 3-)
Code:
# ls -l infile && getfacl infile
-rw-r--r-- 1 root root 0 Oct  7 14:56 infile
# file: infile
# owner: root
# group: root
user::rw-
group::r--
other::r--
## at the now acl mask is not ready.


Code:
# setfacl -m u:jboss:rw infile
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:rw-
group::r--
mask::rw-
other::rw-
## at the now acl mask is ready.
so mask means acl extendend perms is active on this file and it is "rw"..

Code:
# setfacl -x g:jboss infile   ## remove acl perms belong to group who is jboss on the file 
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:rw-
group::r--
mask::rw-
other::rw-

Code:
# setfacl -m u:jboss:rwx infile ## jboss user's permission is now rwx on acls
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:rwx
group::r--
mask::rwx
other::rw-

Code:
# setfacl -m g:jboss:r infile ## jboss group's permission is now "r" on acls
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:rw-
group::r--
group:jboss:r--
mask::rw-
other::rw-
## at the now mask is "rw" for acl perms


Code:
# setfacl -m g:jboss:rwx infile ## jboss group's permission is now rwx on acl
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:rw-
group::r--
group:jboss:rwx
mask::rwx
other::---
## at the now mask is rwx!


Code:
# mkdir test
# setfacl -m d:u:jboss:w test/  ## all files and directorys inherits acl perms from our folder for jboss user 
# touch test/file{1..3}

# getfacl test/file{1..3}

# file: test/file1
# owner: root
# group: root
user::rw-
user:jboss:-w-
group::r-x                      #effective:r--
mask::rw-
other::r--

# file: test/file2
# owner: root
# group: root
user::rw-
user:jboss:-w-
group::r-x                      #effective:r--
mask::rw-
other::r--

# file: test/file3
# owner: root
# group: root
user::rw-
user:jboss:-w-
group::r-x                      #effective:r--
mask::rw-
other::r--


Code:
# setfacl -m u:jboss:--- infile  ##  remove jboss user's acls
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:---
group::r--
mask::r--
other::---

## or

# setfacl -m u:jboss:0 infile  ## same effect
# getfacl infile
# file: infile
# owner: root
# group: root
user::rw-
user:jboss:---
group::r--
mask::r--
other::---
## at the now jboss user has not any acl perms.

Code:
quick summary
m--> modify
x--> remove

u --> user  : jboss : rwx  infile --> ( setfacl -m u:jboss:--- infile )
g --> group : users : rw file/folder -->  ( setfacl -m g:users:rw infile )
o --> others ::rw file / folder  --> ( setfacl -m o::rw test)

regards
ygemici
# 14  
Old 10-19-2011
Unix File Access Right
Hi ygemici,

Thanks for your explanation.
 
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