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Full Discussion: Need assistance on ACL
Top Forums UNIX for Advanced & Expert Users Need assistance on ACL Post 302684837 by leobreaker on Friday 10th of August 2012 06:41:44 AM
Old 08-10-2012
Need assistance on ACL

Hi Friends,

I went through the ACL threads that were posted in the past but none were matching to my requirement . Hence starting a new thread .

Challenge :
user : a
group : Test1

user: b
group: Test2

Say under user a i create dir /tmp/debug with the privilege of 755 and also setfacl as setfacl -m d:g:Test2:rwx /tmp/debug . Why is that i am still not able to create any files in the directory as the user b even though the group Test2 is been granted full access .

below is the demo for the same :
Oracle Linux Server release 6.2
Code:
[root tmp]# groupadd test1
[root tmp]# groupadd test2
[root tmp]# useradd -g test1 a
[root tmp]# useradd -g test2 b
[root tmp]# passwd a
Changing password for user a.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[root tmp]# passwd b
Changing password for user b.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
[root tmp]# su - a
[a ~]$ cd /tmp
[a tmp]$ id a
uid=517(a) gid=1039(test1) groups=1039(test1)
[a tmp]$ id b
uid=518(b) gid=1042(test2) groups=1042(test2)
[a tmp]$ mkdir debug
[a tmp]$ ls -tld debug/
drwxr-xr-x 2 a test1 4096 Aug 10 16:02 debug/
[a tmp]$ chmod 755 debug
[a tmp]$ ls -tld debug/
drwxr-xr-x 2 a test1 4096 Aug 10 16:02 debug/
[a tmp]$ id
uid=517(a) gid=1039(test1) groups=1039(test1)
[a tmp]$ setfacl -m  d:g:test2:rwx /tmp/debug
[a tmp]$ getfacl /tmp/debug
# file: tmp/debug
# owner: a
# group: test1
user::rwx
group::r-x
other::r-x
default:user::rwx
default:group::r-x
default:group:test2:rwx
default:mask::rwx
default:other::r-x

[a tmp]$ id
uid=517(a) gid=1039(test1) groups=1039(test1)
[a tmp]$ su - b
Password:
[b ~]$ cd /tmp/debug/
[b debug]$ touch 1
touch: cannot touch `1': Permission denied
[b debug]$ pwd
/tmp/debug
.

Any early response would be highly appreciated.

Thanks,
leo
Moderator's Comments:
Mod Comment Please view this code tag video for how to use code tags when posting code and data.

Last edited by Corona688; 08-10-2012 at 12:47 PM..
 

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acltotext(3SEC) 				       File Access Control Library Functions					   acltotext(3SEC)

NAME
acltotext, aclfromtext - convert internal representation to or from external representation SYNOPSIS
cc [ flag... ] file... -lsec [ library... ] #include <sys/acl.h> char *acltotext(aclent_t *aclbufp, int aclcnt); aclent_t *aclfromtext(char *acltextp, int *aclcnt); DESCRIPTION
The acltotext() function converts an internal ACL representation pointed to by aclbufp into an external ACL representation. The space for the external text string is obtained using malloc(3C). The caller is responsible for freeing the space upon completion.. The aclfromtext() function converts an external ACL representation pointed to by acltextp into an internal ACL representation. The space for the list of ACL entries is obtained using malloc(3C). The caller is responsible for freeing the space upon completion. The aclcnt argu- ment indicates the number of ACL entries found. An external ACL representation is defined as follows: <acl_entry>[,<acl_entry>]... Each <acl_entry> contains one ACL entry. The external representation of an ACL entry contains two or three colon-separated fields. The first field contains the ACL entry tag type. The entry type keywords are defined as: user This ACL entry with no UID specified in the ACL entry ID field specifies the access granted to the owner of the object. Otherwise, this ACL entry specifies the access granted to a specific user-name or user-id number. group This ACL entry with no GID specified in the ACL entry ID field specifies the access granted to the owning group of the object. Otherwise, this ACL entry specifies the access granted to a specific group-name or group-id number. other This ACL entry specifies the access granted to any user or group that does not match any other ACL entry. mask This ACL entry specifies the maximum access granted to user or group entries. default:user This ACL entry with no uid specified in the ACL entry ID field specifies the default access granted to the owner of the object. Otherwise, this ACL entry specifies the default access granted to a specific user-name or user-ID number. default:group This ACL entry with no gid specified in the ACL entry ID field specifies the default access granted to the owning group of the object. Otherwise, this ACL entry specifies the default access granted to a specific group-name or group-ID number. default:other This ACL entry specifies the default access for other entry. default:mask This ACL entry specifies the default access for mask entry. The second field contains the ACL entry ID, as follows: uid This field specifies a user-name, or user-ID if there is no user-name associated with the user-ID number. gid This field specifies a group-name, or group-ID if there is no group-name associated with the group-ID number. empty This field is used by the user and group ACL entry types. The third field contains the following symbolic discretionary access permissions: r read permission w write permission x execute/search permission - no access RETURN VALUES
Upon successful completion, the acltotext() function returns a pointer to a text string. Otherwise, it returns NULL. Upon successful completion, the aclfromtext() function returns a pointer to a list of ACL entries. Otherwise, it returns NULL. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
acl(2), malloc(3C), attributes(5) SunOS 5.11 10 Dec 2001 acltotext(3SEC)
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