Trac Permissions

Trac uses a simple, case sensitive, permission system to control what users can and can't access.

Permissions are managed using the trac-admin tool or the General / Permissions panel in the Admin tab of the web interface.

In addition to the default permission policy described in this page, it is possible to activate additional permission policies by enabling plugins and listing them in [trac] permission_policies. See TracFineGrainedPermissions for more details.

Non-authenticated users accessing the system are assigned the name anonymous. Assign permissions to the anonymous user to set privileges for anonymous/guest users. The parts of Trac that a user does not have privilege for will not be displayed in the navigation. In addition to these privileges, users can be granted additional individual rights in effect when authenticated and logged into the system. All logged in users belong to the virtual group authenticated, which inherits permissions from anonymous.

Graphical Admin Tab

To access this tab, a user must have one of the following permissions: TRAC_ADMIN, PERMISSION_ADMIN, PERMISSION_GRANT, PERMISSION_REVOKE. The permissions can be granted using the trac-admin command with a more detailed description below:

$ trac-admin /path/to/projenv permission add bob TRAC_ADMIN

Then, the user bob will be able to see the Admin tab, and can access the permissions menu. This menu will allow you to perform all the following actions, but from the browser rather than requiring root access to the server. Use at least one lowercase character in user names, as all-uppercase names are reserved for permissions.

From the graphical admin tab, users with PERMISSION_GRANT will only be allowed to grant permissions that they possess, and users with PERMISSION_REVOKE will only be allowed to revoke permissions that they possess. For example, a user cannot grant MILESTONE_ADMIN unless they have PERMISSION_GRANT and MILESTONE_ADMIN, and they cannot revoke MILESTONE_ADMIN unless they have PERMISSION_REVOKE and MILESTONE_ADMIN. PERMISSION_ADMIN just grants the user both PERMISSION_GRANT and PERMISSION_REVOKE, and users with TRAC_ADMIN can grant or revoke any permission.

Available Privileges

To enable all privileges for a user, use the TRAC_ADMIN permission. This permission is like being root on a *NIX system: it will allow you to perform any operation.

Otherwise, individual privileges can be assigned to users for the different functional areas of Trac and note that the privilege names are uppercase:

Repository Browser

BROWSER_VIEW	View directory listings in the repository browser
FILE_VIEW	View files in the repository browser
CHANGESET_VIEW	View repository check-ins
LOG_VIEW	View revision logs of files and directories in the repository browser

Ticket System

TICKET_VIEW	View existing tickets and perform ticket queries
TICKET_CREATE	Create new tickets
TICKET_APPEND	Add comments and attachments to tickets, and edit description of ticket the user created
TICKET_CHGPROP	Modify ticket properties (priority, assignment, keywords, etc.) with the following exceptions: edit description of tickets created by others, add/remove other users from cc field when logged in
TICKET_MODIFY	Includes both TICKET_APPEND and TICKET_CHGPROP, and in addition allows resolving tickets in the default workflow. Tickets can be assigned to users through a drop-down list when the list of possible owners has been restricted.
TICKET_EDIT_CC	Full modify cc field
TICKET_EDIT_DESCRIPTION	Modify description field. User with TICKET_APPEND or TICKET_CHGPROP can modify description of ticket they created.
TICKET_EDIT_COMMENT	Modify another user's comments. Any user can modify their own comments by default.
TICKET_BATCH_MODIFY	Batch modify tickets
TICKET_ADMIN	All TICKET_* permissions, deletion of ticket attachments and modification of the reporter field, which grants ability to create a ticket on behalf of another user and it will appear that another user created the ticket. It also allows managing ticket properties through the web administration module.

Roadmap

MILESTONE_VIEW	View milestones and assign tickets to milestones.
MILESTONE_CREATE	Create new milestones
MILESTONE_MODIFY	Modify milestones
MILESTONE_DELETE	Delete milestones
MILESTONE_ADMIN	All MILESTONE_* permissions
ROADMAP_VIEW	View the roadmap page, which is not yet the same as MILESTONE_VIEW, see ​#4292
ROADMAP_ADMIN	to be removed with ​#3022, replaced by MILESTONE_ADMIN

Reports

REPORT_VIEW	View reports, i.e. the View Tickets link.
REPORT_SQL_VIEW	View the SQL query of a report
REPORT_CREATE	Create new reports
REPORT_MODIFY	Modify reports
REPORT_DELETE	Delete reports
REPORT_ADMIN	All REPORT_* permissions

Wiki System

WIKI_VIEW	View wiki pages
WIKI_CREATE	Create new wiki pages
WIKI_MODIFY	Modify wiki pages
WIKI_RENAME	Rename wiki pages
WIKI_DELETE	Delete wiki pages and attachments
WIKI_ADMIN	All WIKI_* permissions, plus the management of readonly pages.

Permissions

PERMISSION_GRANT	add/grant a permission
PERMISSION_REVOKE	remove/revoke a permission
PERMISSION_ADMIN	All PERMISSION_* permissions

Others

TIMELINE_VIEW	View the timeline page
SEARCH_VIEW	View and execute search queries
CONFIG_VIEW	Enables additional sections on About Trac that show the current configuration and the list of installed plugins
EMAIL_VIEW	Shows email addresses even if trac show_email_addresses configuration option is false

Attachment Permissions

Attachment permissions are handled by LegacyAttachmentPolicy, and unlike the permissions discussed so far, the permissions provided by LegacyAttachmentPolicy are not directly granted. Rather, the ability to create, view and delete attachments is determined by the attachment's parent realm and permissions the user possesses for that realm.

The attachment actions are determined by the following permissions in the ticket, wiki and milestone realms:

Granted By:	Ticket	Wiki	Milestone
ATTACHMENT_CREATE	TICKET_APPEND	WIKI_MODIFY	MILESTONE_MODIFY
ATTACHMENT_VIEW	TICKET_VIEW	WIKI_VIEW	MILESTONE_VIEW
ATTACHMENT_DELETE	TICKET_ADMIN	WIKI_DELETE	MILESTONE_DELETE

An authenticated user can delete an attachment they added without possessing the permission that grants ATTACHMENT_DELETE.

If explicit attachment permissions are preferred, ATTACHMENT_CREATE, ATTACHMENT_DELETE and ATTACHMENT_VIEW can be created using the ​ExtraPermissionsProvider. The simplest implementation is to simply define the actions.

[extra-permissions]
_perms = ATTACHMENT_CREATE, ATTACHMENT_DELETE, ATTACHMENT_VIEW

An alternative configuration adds an ATTACHMENT_ADMIN meta-permission that grants the other 3 permission.

[extra-permissions]
ATTACHMENT_ADMIN = ATTACHMENT_CREATE, ATTACHMENT_DELETE, ATTACHMENT_VIEW

The explicit permissions can be used in concert with LegacyAttachmentPolicy, or LegacyAttachmentPolicy can be removed from permission_policies, in which case only users that have been explicitly granted the corresponding attachment actions will be able to create, delete and view attachments.

Granting Privileges

You grant privileges to users using trac-admin. The current set of privileges can be listed with the following command:

$ trac-admin /path/to/projenv permission list

This command will allow the user bob to delete reports:

$ trac-admin /path/to/projenv permission add bob REPORT_DELETE

The permission add command also accepts multiple privilege names:

$ trac-admin /path/to/projenv permission add bob REPORT_DELETE WIKI_CREATE

Or add all privileges:

$ trac-admin /path/to/projenv permission add bob TRAC_ADMIN

Permission Groups

There are two built-in groups, authenticated and anonymous. Any user who has not logged in is automatically in the anonymous group. Any user who has logged in is also in the authenticated group. The authenticated group inherits permissions from the anonymous group. For example, if the anonymous group has permission WIKI_MODIFY, it is not necessary to add the WIKI_MODIFY permission to the authenticated group as well.

Custom groups may be defined that inherit permissions from the two built-in groups.

Permissions can be grouped together to form roles such as developer, admin, etc.

$ trac-admin /path/to/projenv permission add developer WIKI_ADMIN
$ trac-admin /path/to/projenv permission add developer REPORT_ADMIN
$ trac-admin /path/to/projenv permission add developer TICKET_MODIFY
$ trac-admin /path/to/projenv permission add bob developer
$ trac-admin /path/to/projenv permission add john developer

Group membership can be checked by doing a permission list with no further arguments; the resulting output will include group memberships. Use at least one lowercase character in group names, as all-uppercase names are reserved for permissions.

Adding a New Group and Permissions

Permission groups can be created by assigning a user to a group you wish to create, then assign permissions to that group.

The following will add bob to the new group called beta_testers and then will assign WIKI_ADMIN permissions to that group. Thus, bob will inherit the WIKI_ADMIN permission.

$ trac-admin /path/to/projenv permission add bob beta_testers
$ trac-admin /path/to/projenv permission add beta_testers WIKI_ADMIN

Removing Permissions

Permissions can be removed using the 'remove' command.

This command will prevent the user bob from deleting reports:

$ trac-admin /path/to/projenv permission remove bob REPORT_DELETE

Just like permission add, this command accepts multiple privilege names.

You can also remove all privileges for a specific user:

$ trac-admin /path/to/projenv permission remove bob '*'

Or one privilege for all users:

$ trac-admin /path/to/projenv permission remove '*' REPORT_ADMIN

Creating New Privileges

To create custom permissions, for example to be used in a custom workflow, enable the optional ​tracopt.perm.config_perm_provider.ExtraPermissionsProvider component in the "Plugins" admin panel, and add the desired permissions to the [extra-permissions] section in your trac.ini. For more information, please refer to the documentation on the TracIni page after enabling the component.

Default Permissions

By default on a new Trac installation, the anonymous user will have view access to everything in Trac, but will not be able to create or modify anything. On the other hand, the authenticated users will have the permissions to create and modify tickets and wiki pages.

anonymous

BROWSER_VIEW
CHANGESET_VIEW
FILE_VIEW
LOG_VIEW
MILESTONE_VIEW
REPORT_SQL_VIEW
REPORT_VIEW
ROADMAP_VIEW
SEARCH_VIEW
TICKET_VIEW
TIMELINE_VIEW
WIKI_VIEW

authenticated

TICKET_CREATE
TICKET_MODIFY
WIKI_CREATE
WIKI_MODIFY

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See also: TracAdmin, TracFineGrainedPermissions