Setting default directory file permissions and ownership help Post: 302485271

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Top Forums UNIX for Dummies Questions & Answers Setting default directory file permissions and ownership help Post 302485271 by v_greg on Tuesday 4th of January 2011 06:36:40 PM

01-04-2011

Registered User

For example of what I'm trying to do...

Code:

root@www10 [/home/internal/employee]# pwd
/home/internal/employee
root@www10 [/home/internal/employee]# ls -l
total 56
drwxr-xr-x  7 internal internal 4096 Jan  4 07:53 ./
drwx--x--x 12 internal internal 4096 Jan  4 07:13 ../
drwx--x--x  2 blake    internal 4096 Jan  4 07:13 blake/
drwx--x--x  2 damien   internal 4096 Jan  4 07:12 damien/
drwx--x--x  2 greg     internal 4096 Jan  4 11:14 greg/
drwx--x--x  2 seth     internal 4096 Jan  4 07:17 seth/
drwxrwx--x  6 internal internal 4096 Jan  4 08:04 shared/
root@www10 [/home/internal/employee]# cd seth
root@www10 [/home/internal/employee/seth]# touch testfile.txt
root@www10 [/home/internal/employee/seth]# ls -l
total 20
drwx--x--x 2 seth     internal 4096 Jan  4 15:58 ./
drwxr-xr-x 7 internal internal 4096 Jan  4 07:53 ../
-rw-r--r-- 1 root     root        0 Jan  4 15:58 testfile.txt

It's easy to su and chmod when using command line, but we're mounting our SSH connection to the server as a local drive. If I create a file in seth's directory, it is given the ownership of root rather than of Seth.

I've figured out group permissions and being able to make the group by putting turning the group sticky bit on, any files or directories created keep the group ID.

I would rather be able to inherit the ownership of the directory than give group r+w permissions.

---------- Post updated at 04:36 PM ---------- Previous update was at 04:32 PM ----------

Quote:

Originally Posted by cjcox

This is actually harder than it seems. Usually the only way to achieve this is via a front end in front of the filesystem. Once such frontend is something like Samba... and you can achieve something like what you are wanting using Samba. But there are likely other frontends (perhaps FUSE based??) that might help as well.

On the opposite end, some systems (filesystems) support some kind of extended ACL feature... it too, might allow you to do something like what you are looking for.

But in general, you can't do what you are wanting automatically by default on most *ix systems.

Thanks - I'll look into the FUSE based idea. We're using FUSE and Macfusion for mounting the SSH drive remotely already on OSX, so maybe I'll look into it further, maybe there's a tweak we can make there. Otherwise I guess it's just a matter of creating extra groups and allowing group read and write access and setting a umask and sticky bit for the GID.

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LEARN ABOUT DEBIAN

xfs_estimate

xfs_estimate(8) 					      System Manager's Manual						   xfs_estimate(8)

NAME

       xfs_estimate - estimate the space that an XFS filesystem will take

SYNOPSIS

       xfs_estimate [ -h? ] [ -b blocksize ] [ -i logsize ]
		    [ -e logsize ] [ -v ] directory ...

DESCRIPTION

       For  each directory argument, xfs_estimate estimates the space that directory would take if it were copied to an XFS filesystem.  xfs_esti-
       mate does not cross mount points.  The following definitions are used:
	      KB = *1024
	      MB = *1024*1024
	      GB = *1024*1024*1024

       The xfs_estimate options are:

       -b blocksize
	      Use blocksize instead of the default blocksize of 4096 bytes.  The modifier k can be used after the number to  indicate  multiplica-
	      tion by 1024.  For example,

		   xfs_estimate -b 64k /

	      requests an estimate of the space required by the directory / on an XFS filesystem using a blocksize of 64K (65536) bytes.

       -v     Display more information, formatted.

       -h     Display usage message.

       -?     Display usage message.

       -i, -e logsize
	      Use  logsize instead of the default log size of 1000 blocks.  -i refers to an internal log, while -e refers to an external log.  The
	      modifiers k or m can be used after the number to indicate multiplication by 1024 or 1048576, respectively.

	      For example,

		   xfs_estimate -i 1m /

	      requests an estimate of the space required by the directory / on an XFS filesystem using an internal log of 1 megabyte.

EXAMPLES

       % xfs_estimate -e 10m /var/tmp
       /var/tmp will take about 4.2 megabytes
	       with the external log using 2560 blocks or about 10.0 megabytes

       % xfs_estimate -v -e 10m /var/tmp
       directory		     bsize   blocks    megabytes    logsize
       /var/tmp 		      4096	792	   4.0MB   10485760

       % xfs_estimate -v /var/tmp
       directory		     bsize   blocks    megabytes    logsize
       /var/tmp 		      4096     3352	  14.0MB   10485760

       % xfs_estimate /var/tmp
       /var/tmp will take about 14.0 megabytes

																   xfs_estimate(8)