Custom ACL for S3 buckets and keys. Post: 302382576

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Special Forums UNIX and Linux Applications Virtualization and Cloud Computing Custom ACL for S3 buckets and keys. Post 302382576 by linuxpenguin on Wednesday 23rd of December 2009 08:20:35 PM

12-23-2009

Registered User

Custom ACL for S3 buckets and keys.

Recently I realized that s3cmd (ubuntu) does not let you have custom acl's on s3 objects. So I wrote the following ruby script and I thought I could share with you all. Using s3fox, s3hub etc was really painful.

Code:

#!/usr/bin/env ruby
require 'rubygems'
require 'aws/s3'

key = ARGV[0] ## they key that you want to add ACL to. e.g. foo.txt
bucket = "<your_bucket_name>"
user_id = "<id_of_theobject>" ## It is a little tricky to get this one.
name = "<display_name_of_the_user>"
perms = "<Permissions you want in the ACL>" ## e.g. READ

AWS::S3::Base.establish_connection!(
  :access_key_id     => "<key_id>",
  :secret_access_key => "<access_key>"
)

policy = AWS::S3::S3Object.acl( key, bucket )
grant = AWS::S3::ACL::Grant.new
grantee = AWS::S3::ACL::Grantee.new
grant.grantee = grantee
grant.permission = perms
policy.grants << grant
grantee.type = "CanonicalUser"
grantee.id = user_id
grantee.display_name = name
AWS::S3::S3Object.acl( key, bucket , policy)

## And thats it, run s3cmd info /<BUCKET>/<key> to see the new ACL.

Last edited by Scott; 12-23-2009 at 11:08 PM.. Reason: sharing code tags :)

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LEARN ABOUT OSX

acl_delete_entry

ACL_DELETE_ENTRY(3)					   BSD Library Functions Manual 				       ACL_DELETE_ENTRY(3)

NAME

     acl_delete_entry -- delete an ACL entry from an ACL

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/types.h>
     #include <sys/acl.h>

     int
     acl_delete_entry(acl_t acl, acl_entry_t entry_d);

DESCRIPTION

     The acl_delete_entry() function is a POSIX.1e call that removes the ACL entry entry_d from ACL acl.

RETURN VALUES

     The acl_delete_entry() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to
     indicate the error.

ERRORS

     The acl_delete_entry() function fails if:

     [EINVAL]		Argument acl does not point to a valid ACL.  Argument entry_d is not a valid descriptor for an ACL entry in acl.

SEE ALSO

     acl(3), acl_copy_entry(3), acl_get_entry(3), posix1e(3)

STANDARDS

     POSIX.1e is described in IEEE POSIX.1e draft 17.

AUTHORS

     Michael Smith
     Chris D Fulhaber

BSD
								  March 10, 2001							       BSD

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