# Plugin Hook API Reference

The following table shows all known Cacti plugin hooks and a brief description of their function.

hook | hook | hook
--- | --- | ---
add_graph_template_to_host | api_device_new | api_device_save
auth_alternate_realms | boost_poller_bottom | bottom_footer
cacti_stats_update | change_password_title | clog_regex_array
config_arrays | config_form | config_insert
config_settings | console_after | console_before
copy_user | create_complete_graph_from_template | custom_login
custom_logout_message | custom_password | custom_version_info
data_input_sql_where | data_source_action_array | data_source_action_bottom
data_source_action_execute | data_source_action_prepare | data_source_edit_bottom
data_source_edit_top | data_source_remove | data_sources_table
data_source_to_poller_items | device_action_array | device_action_bottom
device_action_execute | device_action_prepare | device_edit_pre_bottom
device_edit_top_links | device_filters | device_remove
device_sql_where | device_table_bottom | device_template_edit
device_template_top | draw_navigation_text | export_action
fgc_contextoption | get_friendly_name | global_settings_update
graph | graph_buttons | graph_edit_after
graph_image | graph_items_remove | graphs_action_array
graphs_action_bottom | graphs_action_execute | graphs_action_prepare
graphs_item_array | graphs_new_top_links | graphs_remove
graphs_sql_where | graph_tree_page_buttons | hmib_get_cpu
hmib_get_cpu_indexes | hmib_get_disk | host_edit_bottom
host_edit_top | host_save | import_action
is_console_page | login_after | login_before
login_options_navigate | login_process | login_realms
login_title | logout_post_session_destroy | logout_pre_session_destroy
nav_login_after | nav_login_before | page_bottom
page_buttons | page_head | page_title
poller_bottom | poller_command_args | poller_exiting
poller_finishing | poller_output | poller_top
remote_agent | replicate_in | replicate_out
report_filters | resolve_dependencies | rrd_graph_graph_options
run_data_query | snmpagent_cache_install | substitute_host_data
top_graph_header | top_graph_header_tabs | top_graph_jquery_function
top_graph_refresh | top_header | tree_after
tree_view_page_end | ugroup_tabs | update_data_source_title_cache
user_admin_action | user_admin_edit | user_admin_run_action
user_admin_setup_sql_save | user_admin_tab | user_admin_user_save
user_group_admin_action | user_group_admin_edit | user_group_admin_save
user_group_admin_setup_sql_save | user_remove | utilities_action
utilities_array | utilities_list | valid_host_fields

## add_graph_template_to_host

Allows you to perform additional operations when adding a graph template to host. The parameters passed are `host_id` and `graph_template_id`.

file | introduced | retired
--- | --- | ---
cli/add_graph_template.php | 1.0.0 |
cli/host_update_template.php | 1.0.0 |
host.php | 1.0.0 |
lib/api_device.php | 1.0.0 |

## api_device_new

This hooks allows you to perform additional operation at the end of api_device_save function. Unlike the api_device_save hook, the device ID is already defined here.

file | introduced | retired
--- | --- | ---
lib/api_device.php | 1.0.0 |

## api_device_save

This hook allows you to perform additional operation at the end of api_device_save function. Unlike the api_device_new hook, the device ID is might not be defined here.

This hook allows you to alter the contents to the device table with custom fields. When used properly, it allows you to extend the host table with your plugins custom fields.

file | introduced | retired
--- | --- | ---
lib/api_device.php | 1.0.0 |

## auth_alternate_realms

This hook allows you to handle user login check alternate plugin defined authentication realms.

file | introduced | retired
--- | --- | ---
include/auth.php | 1.0.0 |

## boost_poller_bottom

file | introduced | retired
--- | --- | ---
poller_boost.php | 1.0.0 |

## bottom_footer

Allows you to override the rendering of the bottom_footer html snippet.

file | introduced | retired
--- | --- | ---
include/bottom_footer.php | 1.0.0 | 1.1.38

## cacti_stats_update

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 |

## change_password_title

file | introduced | retired
--- | --- | ---
auth_changepassword.php | 1.2.0-beta1 |

## clog_regex_array

Allows you to enhance the Logs display with additional information or links.

file | introduced | retired
--- | --- | ---
lib/clog_webapi.php | 1.1.34 |

## config_arrays

Allows your plug-in to define custom array elements to be used throughout cacti. Things like dropdown arrays and the like.

file | introduced | retired
--- | --- | ---
include/global_arrays.php | 1.0.0 |

## config_form

Allows you to define form object to represent data to be stored in your tables. In the case of MacTrack, there is a table called `mac_track_sites` and in order to drive the UI and allow for the user to provide input and save a site, you must provide the Cacti form engine a form array to allow for the form to be presented and contents to be saved.

file | introduced | retired
--- | --- | ---
include/global_form.php | 1.0.0 |

## config_insert

This is a general purpose hook used for connecting to other database, or sourcing common includes that would otherwise not be sourced.

file | introduced | retired
--- | --- | ---
include/global.php | 1.0.0 |

## config_settings

Allows you to extend the Cacti settings page to allow for custom tabs and global settings within them.

file | introduced | retired
--- | --- | ---
include/global_settings.php | 1.0.0 |

## console_after

Allows you to add text after the default message on the console page

file | introduced | retired
--- | --- | ---
index.php | 1.0.0 |

## console_before

Allows you to add text before the default message on the console page. For instance, the Update plug-in will display a message here if there are new versions of plugins.

file | introduced | retired
--- | --- | ---
index.php | 1.0.0 |

## copy_user

Allows a plugin to take part in the Copy User actions. This is important a plugin maintains user settings.

file | introduced | retired
--- | --- | ---
lib/auth.php | 1.0.0 |

## create_complete_graph_from_template

Allows you to perform additional operations when adding new graph to device from graph template.

file | introduced | retired
--- | --- | ---
lib/template.php | 1.0.0 |

## custom_login

Allows you to override the rendering of the auth_login.php page.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## custom_logout_message

Allows you to override the rendering of the logout.php page.

file | introduced | retired
--- | --- | ---
logout.php | 1.0.0 |

## custom_password

Allows you to override the rendering of the auth_changepassword.php page.

file | introduced | retired
--- | --- | ---
auth_changepassword.php | 1.0.0 |

## custom_version_info

Allows your plugin to display additional information on the cacti tech support page.

file | introduced | retired
--- | --- | ---
utilities.php | 1.0.0 |

## data_input_sql_where

file | introduced | retired
--- | --- | ---
data_input.php | 1.0.0 |

## data_source_action_array

Allows you to define custom dropdown actions from within the data sources page.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_action_bottom

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_action_execute

Allows you to define custom actions to be taken upon you dropdown selection.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_action_prepare

This is the final component to creating a custom action within the data sources. In Cacti's form engine, you must provide the dropdown action and then two follow-up actions to complete the cycle. This is were you actually save the data.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_edit_bottom

Allows you to make minor change to the Data Sources page, like add a tabbed interface.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_edit_top

Allows you to make minor changes to the Data Sources page, like add a tabbed interface.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_remove

This hook is called when the data sources used by a graph are removed. The parameters are the graphs data sources.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 | 1.1.38
graphs.php | 1.0.0 | 1.1.38
host.php | 1.0.0 | 1.1.38
lib/api_data_source.php | 1.2.0-beta1 |

## data_sources_table

Allows you to change the data displayed on the Data Sources table. THold uses this to create a link to that datasources threshold

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## data_source_to_poller_items

file | introduced | retired
--- | --- | ---
lib/utility.php | 1.0.0 |

## device_action_array

Allows you to define custom dropdown actions from within the device/host page.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_action_bottom

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_action_execute

Allows you to define custom actions to be taken upon you dropdown selection.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_action_prepare

This is the final component to creating a custom action within the devices. In Cacti's form engine, you must provide the dropdown action and then two follow-up actions to complete the cycle. This is were you actually save the data.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_edit_pre_bottom

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_edit_top_links

This hook allows you to add custom actions to the host edit page, below the "Create graphs for this Host".

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_filters

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_remove

This hook allows you to perform additional actions on devices that have been selected for deletion. The parameter is an array of deleted device IDs. Note that at this point, the devices are already deleted from the host table.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 | 1.1.38
lib/api_device.php | 1.2.0-beta1 |

## device_sql_where

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_table_bottom

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## device_template_edit

file | introduced | retired
--- | --- | ---
host_templates.php | 1.0.0 |

## device_template_top

file | introduced | retired
--- | --- | ---
host_templates.php | 1.0.0 |

## draw_navigation_text

Just below the Cacti "Console", and "Graphs" tabs, cacti provides a Navigation bar that allows you to move backward in a selection tree. Although it is not foolproof, this hook allows you to populate and navigate that tree.

file | introduced | retired
--- | --- | ---
lib/functions.php | 1.0.0 |

## export_action

file | introduced | retired
--- | --- | ---
lib/export.php | 1.2.0-beta1 |

## fgc_contextoption

file | introduced | retired
--- | --- | ---
lib/functions.php | 1.1.28 |

## get_friendly_name

file | introduced | retired
--- | --- | ---
lib/import.php | 1.2.0-beta1 |

## global_settings_update

file | introduced | retired
--- | --- | ---
settings.php | 1.0.0 |

## graph

This hook is called at the top of graph.php page

file | introduced | retired
--- | --- | ---
graph.php | 1.0.0 |

## graph_buttons

You know about the zoom button right? Well this allows you to add any additional custom button to the right of a graph.

file | introduced | retired
--- | --- | ---
graph.php | 1.0.0 |

## graph_edit_after

file | introduced | retired
--- | --- | ---
graphs.php | 1.2.0-beta1 |

## graph_image

This hooks allows displaying of alternative graphics in place of a graph image. This hook can no output text, only modify the image, as it is only called when a graph is required to be outputted.

file | introduced | retired
--- | --- | ---
graph_image.php | 1.0.0 |
graph_json.php | 1.0.0 |

## graph_items_remove

This hook is called when when the data source is deleted, and the option to remove all graph items tied to the data source is selected.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 |

## graphs_action_array

Similar to the host actions and host, prepare and execute hooks. It allows you to have custom dropdown actions within the graph management interface.

file | introduced | retired
--- | --- | ---
graphs.php | 1.0.0 |

## graphs_action_bottom

file | introduced | retired
--- | --- | ---
graphs.php | 1.0.0 |

## graphs_action_execute

file | introduced | retired
--- | --- | ---
graphs.php | 1.0.0 |

## graphs_action_prepare

file | introduced | retired
--- | --- | ---
graphs.php | 1.0.0 |

## graphs_item_array

file | introduced | retired
--- | --- | ---
graphs.php | 1.2.0-beta1 |

## graphs_new_top_links

Add a link at the top of the "Create New Graphs" page.

file | introduced | retired
--- | --- | ---
graphs_new.php | 1.0.0 |

## graphs_remove

This hook is called after one or more graphs are removed. The parameters are the removed graph IDs.

file | introduced | retired
--- | --- | ---
data_sources.php | 1.0.0 | 1.1.38
graphs.php | 1.0.0 | 1.1.38
host.php | 1.0.0 | 1.1.38
lib/api_graph.php | 1.2.0-beta1 |

## graphs_sql_where

This hooks allows you to add additional where clauses to the select statement used to display graphs on the graphs.php page.

file | introduced | retired
--- | --- | ---
graphs.php | 1.0.0 |

## graph_tree_page_buttons

Allows you to add custom HTML to the graph tree view page, under the timespan presets and the graph search box.

file | introduced | retired
--- | --- | ---
lib/html_tree.php | 1.0.0 |

## hmib_get_cpu

file | introduced | retired
--- | --- | ---
scripts/ss_host_cpu.php | 1.0.0 |

## hmib_get_cpu_indexes

file | introduced | retired
--- | --- | ---
scripts/ss_host_cpu.php | 1.0.0 |

## hmib_get_disk

file | introduced | retired
--- | --- | ---
scripts/ss_host_disk.php | 1.0.0 |

## host_edit_bottom

Allows you to make minor changes to the Devices page, like add a tabbed interface.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## host_edit_top

Allows you to make minor changes to the Devices page, like add a tabbed interface.

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## host_save

file | introduced | retired
--- | --- | ---
host.php | 1.0.0 |

## import_action

file | introduced | retired
--- | --- | ---
lib/import.php | 1.2.0-beta1 |

## is_console_page

file | introduced | retired
--- | --- | ---
lib/html.php | 1.0.0 |

## login_after

This allows you to display text or html after the login form.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## login_before

This allows you to display text or html before the login form. Combined with the above hook, you could draw a box, etc around the form, change its background color, etc to slightly customize the login page.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## login_options_navigate

Used to support alternate login realm types.

file | introduced | retired
--- | --- | ---
auth_changepassword.php | 1.0.0 |
auth_login.php | 1.0.0 |

## login_process

Used to authenticate the user logging in to a custom plugin defined realm.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## login_realms

Used to defined additional custom plugin defined authentication realms. The parameter passed is an array of existing authentication realms.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## login_title

Allows the plugin to set/modify that page title.

file | introduced | retired
--- | --- | ---
auth_login.php | 1.0.0 |

## logout_post_session_destroy

This pair of hooks (`logout_pre_session_destroy` and `logout_post_session_destroy`) allows you to preserve some session variables that would otherwise get unset, when `session_destroy()` is called.

file | introduced | retired
--- | --- | ---
logout.php | 1.0.0 |

## logout_pre_session_destroy

This pair of hooks (`logout_pre_session_destroy` and `logout_post_session_destroy`) allows you to preserve some session variables that would otherwise get unset, when `session_destroy()` is called.

file | introduced | retired
--- | --- | ---
logout.php | 1.0.0 |

## nav_login_after

This pair of hooks (`nav_login_before` and `nav_login_after`) allows you to add custom HTML to the navigation bar, before and after the "Logged in as " text.

file | introduced | retired
--- | --- | ---
lib/functions.php | 1.0.0 |

## nav_login_before

This pair of hooks (`nav_login_before` and `nav_login_after`) allows you to add custom HTML to the navigation bar, before and after the "Logged in as " text.

file | introduced | retired
--- | --- | ---
lib/functions.php | 1.0.0 |

## page_bottom

This hook allows you to add custom HTML to the bottom of the page, after the main layout table.

file | introduced | retired
--- | --- | ---
include/bottom_footer.php | 1.0.0 |

## page_buttons

Allows you to add custom buttons and HTML to the top of the graph.php page, above the "Viewing graph" row.

file | introduced | retired
--- | --- | ---
graph.php | 1.0.0 |

## page_head

This hook allows you to add custom HTML tags to the page tag.

file | introduced | retired
--- | --- | ---
graph_realtime.php | 1.0.0 | 1.1.33
include/top_general_header.php | 1.0.0 | 1.1.33
include/top_graph_header.php | 1.0.0 | 1.1.33
include/top_header.php | 1.0.0 | 1.1.33
lib/html.php | 1.1.34 |

## page_title

Allows the plugin to set/modify the page title

file | introduced | retired
--- | --- | ---
include/top_general_header.php | 1.0.0 |
include/top_graph_header.php | 1.0.0 |
include/top_header.php | 1.0.0 |

## poller_bottom

This hook allows you to launch other polling activities once Cacti has complete it's polling activities. Things like MacTrack, Boost, THold, and others use this hook to launch their respective poller.

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 |

## poller_command_args

Using this hook, your plugin can pass additional command line arguments to the poller.

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 | 1.2.29

## poller_exiting

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 |

## poller_finishing

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 |

## poller_output

This hook was designed specifically for the boost plug-in. However, it has found new life in many plugins making them much faster now. What this hook allows you to do is intercept the contents of the `poller_output` table before the data is deleted. This allows for things like threshold checking and other interesting actions such as checking for up/down events and the like. Previously, plugins were reliant on using things like `rrdtool fetch` to perform these actions. Now they can leverage the pollers output directly.

file | introduced | retired
--- | --- | ---
lib/poller.php | 1.0.0 |

## poller_top

This hook allows you to launch processes concurrently with the Cacti poller for things like THolds fast poller for example.

file | introduced | retired
--- | --- | ---
poller.php | 1.0.0 |

## remote_agent

file | introduced | retired
--- | --- | ---
remote_agent.php | 1.0.0 |

## replicate_in

file | introduced | retired
--- | --- | ---
lib/poller.php | 1.0.0 |

## replicate_out

file | introduced | retired
--- | --- | ---
lib/api_device.php |  |
lib/poller.php | 1.0.0 |

## resolve_dependencies

file | introduced | retired
--- | --- | ---
lib/export.php | 1.2.0-beta1 |

## rrd_graph_graph_options

This hook allows you to specify additional options or change parameters regarding graph image rendering. Some of the parameters will be passed to RRDTool.

file | introduced | retired
--- | --- | ---
lib/rrd.php | 1.0.0 |

## run_data_query

This hook allows your plugin to perform additional operations after a data query update was triggered.

file | introduced | retired
--- | --- | ---
lib/data_query.php | 1.0.0 |

## snmpagent_cache_install

file | introduced | retired
--- | --- | ---
lib/snmpagent.php | 1.0.0 |

## substitute_host_data

This allows you to add to the substitution variables that cacti can parse.

file | introduced | retired
--- | --- | ---
lib/variables.php | 1.0.0 | 1.1.5

## top_graph_header

Allows you to override the rendering of the top_graph_header.php include.

file | introduced | retired
--- | --- | ---
include/top_graph_header.php | 1.0.0 | 1.1.38

## top_graph_header_tabs

This hook is used to add tab's to Cacti's user interface.

file | introduced | retired
--- | --- | ---
lib/html.php | 1.0.0 |

## top_graph_jquery_function

file | introduced | retired
--- | --- | ---
lib/html_tree.php | 1.0.0 |

## top_graph_refresh

This allows you to change the refresh on the graph (and any plug-in page that calls the graph header)

file | introduced | retired
--- | --- | ---
include/global_session.php | 1.0.0 |
include/themes/sunrise/global_session.php | 1.1.11 | 1.1.38

## top_header

This hooks enables you to output custom HTML on top the the graph view page, if navigation tabs are not rendered. Allows you to override the rendering of the top_header.php include.

file | introduced | retired
--- | --- | ---
include/top_general_header.php | 1.0.0 | 1.1.38
include/top_header.php | 1.0.0 | 1.1.38

## tree_after

This hook allows you to add additional HTML at the bottom of the graph tree view page. The HTML is rendered only if a valid graph tree leaf is selected.

file | introduced | retired
--- | --- | ---
lib/html_tree.php | 1.0.0 |

## tree_view_page_end

This hook allows you to add additional HTML at the bottom of the graph tree view page, irrespective of the leaf selection.

file | introduced | retired
--- | --- | ---
graph.php | 1.0.0 |
lib/html_tree.php | 1.0.0 |

## ugroup_tabs

file | introduced | retired
--- | --- | ---
user_group_admin.php | 1.0.0 |

## update_data_source_title_cache

This hook is called after the data source title cache is updated.

file | introduced | retired
--- | --- | ---
lib/variables.php | 1.0.0 |

## user_admin_action

This hook is part of a series of hooks that allow you to add custom user settings. Consider a plug-in called "abc". In that plug-in, you want to save custom settings on a per user basis. Therefore, following our unpublished ? table naming standards, you would create a table called "abc_settings". When you tab over to the "abc" plug-in, you are provided an "abc settings" on the right similar to "Graphs". The next series of hooks allow you to present those settings to the user, enable or disable the users access to that specific "abc settings" tab and allow an administrator to define customer values for that plug-in on a per user basis.

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |

## user_admin_edit

See the explanation on `user_admin_action`

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |

## user_admin_run_action

See the explanation on `user_admin_action`

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |

## user_admin_setup_sql_save

See the explanation on `user_admin_action`

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |

## user_admin_tab

See the explanation on `user_admin_action`

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |
utilities.php | 1.0.0 |

## user_admin_user_save

See the explanation on `user_admin_action`

file | introduced | retired
--- | --- | ---
user_admin.php | 1.0.0 |

## user_group_admin_action

file | introduced | retired
--- | --- | ---
user_group_admin.php | 1.0.0 |

## user_group_admin_edit

file | introduced | retired
--- | --- | ---
user_group_admin.php | 1.0.0 |

## user_group_admin_save

file | introduced | retired
--- | --- | ---
user_group_admin.php | 1.0.0 |

## user_group_admin_setup_sql_save

file | introduced | retired
--- | --- | ---
user_group_admin.php | 1.0.0 |

## user_remove

Allows the plugin to take part in the user removal process. Important when the plugin maintains user settings.

file | introduced | retired
--- | --- | ---
lib/auth.php | 1.0.0 |
user_admin.php | 1.0.0 |

## utilities_action

This hook set's up the function to be executed from within Cacti's utilities section.

file | introduced | retired
--- | --- | ---
utilities.php | 1.0.0 |

## utilities_array

file | introduced | retired
--- | --- | ---
utilities.php | 1.0.4 |

## utilities_list

This hook allows you to add a custom utilities pick under Cacti's "Utilities" page.

file | introduced | retired
--- | --- | ---
utilities.php | 1.0.0 |

## valid_host_fields

Allows your plugin to define additional variables that will be used in substitute_host_data.

Pretty sure that this hook allows you to define custom replacement values in graphs.

file | introduced | retired
--- | --- | ---
include/global_form.php | 1.0.0 |

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