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	diff --git a/include/crm/common/output_internal.h b/include/crm/common/output_internal.h
	index f3a1545abe..5d42f922e6 100644
	--- a/include/crm/common/output_internal.h
	+++ b/include/crm/common/output_internal.h
	@@ -1,1019 +1,1019 @@
	/*
	* Copyright 2019-2024 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU Lesser General Public License
	* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
	*/

	#ifndef PCMK__CRM_COMMON_OUTPUT_INTERNAL__H
	#define PCMK__CRM_COMMON_OUTPUT_INTERNAL__H

	#include <stdbool.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <libxml/tree.h>
	#include <libxml/HTMLtree.h>

	#include <glib.h>
	#include <crm/common/results.h>

	#ifdef __cplusplus
	extern "C" {
	#endif

	/**
	* \file
	* \brief Formatted output for pacemaker tools
	*/

	#if defined(PCMK__WITH_ATTRIBUTE_OUTPUT_ARGS)
	#define PCMK__OUTPUT_ARGS(ARGS...) __attribute__((output_args(ARGS)))
	#else
	#define PCMK__OUTPUT_ARGS(ARGS...)
	#endif

	typedef struct pcmk__output_s pcmk__output_t;

	/*!
	* \internal
	* \brief The type of a function that creates a ::pcmk__output_t.
	*
	* Instances of this type are passed to pcmk__register_format(), stored in an
	* internal data structure, and later accessed by pcmk__output_new(). For
	* examples, see pcmk__mk_xml_output() and pcmk__mk_text_output().
	*
	* \param[in] argv The list of command line arguments.
	*/
	typedef pcmk__output_t * (pcmk__output_factory_t)(char *argv);

	/*!
	* \internal
	* \brief The type of a custom message formatting function.
	*
	* These functions are defined by various libraries to support formatting of
	* types aside from the basic types provided by a ::pcmk__output_t.
	*
	* The meaning of the return value will be different for each message.
	* In general, however, 0 should be returned on success and a positive value
	* on error.
	*
	* \param[in,out] out Output object to use to display message
	* \param[in,out] args Message-specific arguments needed
	*
	* \note These functions must not call va_start or va_end - that is done
	* automatically before the custom formatting function is called.
	*/
	typedef int (pcmk__message_fn_t)(pcmk__output_t out, va_list args);

	/*!
	* \internal
	* \brief Internal type for tracking custom messages.
	*
	* Each library can register functions that format custom message types. These
	* are commonly used to handle some library-specific type. Registration is
	* done by first defining a table of ::pcmk__message_entry_t structures and
	* then passing that table to pcmk__register_messages(). Separate handlers
	* can be defined for the same message, but for different formats (xml vs.
	* text). Unknown formats will be ignored.
	*
	* Additionally, a "default" value for fmt_table can be used. In this case,
	* fn will be registered for all supported formats. It is also possible to
	* register a default and then override that registration with a format-specific
	* function if necessary.
	*
	* \note The ::pcmk__message_entry_t table is processed in one pass, in order,
	* from top to bottom. This means later entries with the same message_id will
	* override previous ones. Thus, any default entry must come before any
	* format-specific entries for the same message_id.
	*/
	typedef struct pcmk__message_entry_s {
	/*!
	* \brief The message to be handled.
	*
	* This must be the same ID that is passed to the message function of
	* a ::pcmk__output_t. Unknown message IDs will be ignored.
	*/
	const char *message_id;

	/*!
	* \brief The format type this handler is for.
	*
	* This name must match the fmt_name of the currently active formatter in
	* order for the registered function to be called. It is valid to have
	* multiple entries for the same message_id but with different fmt_name
	* values.
	*/
	const char *fmt_name;

	/*!
	* \brief The function to be called for message_id given a match on
	* fmt_name. See comments on ::pcmk__message_fn_t.
	*/
	pcmk__message_fn_t fn;
	} pcmk__message_entry_t;

	/*!
	* \internal
	* \brief This structure contains everything needed to add support for a
	* single output formatter to a command line program.
	*/
	typedef struct pcmk__supported_format_s {
	/*!
	* \brief The name of this output formatter, which should match the
	* fmt_name parameter in some ::pcmk__output_t structure.
	*/
	const char *name;

	/*!
	* \brief A function that creates a ::pcmk__output_t.
	*/
	pcmk__output_factory_t create;

	/*!
	* \brief Format-specific command line options. This can be NULL if
	* no command line options should be supported.
	*/
	GOptionEntry *options;
	} pcmk__supported_format_t;

	/* The following three blocks need to be updated each time a new base formatter
	* is added.
	*/

	extern GOptionEntry pcmk__html_output_entries[];
	extern GOptionEntry pcmk__text_output_entries[];

	pcmk__output_t pcmk__mk_html_output(char *argv);
	pcmk__output_t pcmk__mk_log_output(char *argv);
	pcmk__output_t pcmk__mk_none_output(char *argv);
	pcmk__output_t pcmk__mk_text_output(char *argv);
	pcmk__output_t pcmk__mk_xml_output(char *argv);

	#define PCMK__SUPPORTED_FORMAT_HTML { "html", pcmk__mk_html_output, pcmk__html_output_entries }
	#define PCMK__SUPPORTED_FORMAT_LOG { "log", pcmk__mk_log_output, NULL }
	#define PCMK__SUPPORTED_FORMAT_NONE { PCMK_VALUE_NONE, pcmk__mk_none_output, NULL }
	#define PCMK__SUPPORTED_FORMAT_TEXT { "text", pcmk__mk_text_output, pcmk__text_output_entries }
	#define PCMK__SUPPORTED_FORMAT_XML { "xml", pcmk__mk_xml_output, NULL }

	/*!
	* \brief This structure contains everything that makes up a single output
	* formatter.
	*
	* Instances of this structure may be created by calling pcmk__output_new()
	* with the name of the desired formatter. They should later be freed with
	* pcmk__output_free().
	*/
	struct pcmk__output_s {
	/*!
	* \brief The name of this output formatter.
	*/
	const char *fmt_name;

	/*!
	* \brief Should this formatter supress most output?
	*
	* \note This setting is not respected by all formatters. In general,
	* machine-readable output formats will not support this while
	* user-oriented formats will. Callers should use is_quiet()
	* to test whether to print or not.
	*/
	bool quiet;

	/*!
	* \brief A copy of the request that generated this output.
	*
	* In the case of command line usage, this would be the command line
	* arguments. For other use cases, it could be different.
	*/
	gchar *request;

	/*!
	* \brief Where output should be written.
	*
	* This could be a file handle, or stdout or stderr. This is really only
	* useful internally.
	*/
	FILE *dest;

	/*!
	* \brief Custom messages that are currently registered on this formatter.
	*
	* Keys are the string message IDs, values are ::pcmk__message_fn_t function
	* pointers.
	*/
	GHashTable *messages;

	/*!
	* \brief Implementation-specific private data.
	*
	* Each individual formatter may have some private data useful in its
	* implementation. This points to that data. Callers should not rely on
	* its contents or structure.
	*/
	void *priv;

	/*!
	* \internal
	* \brief Take whatever actions are necessary to prepare out for use. This is
	* called by pcmk__output_new(). End users should not need to call this.
	*
	* \note For formatted output implementers - This function should be written in
	* such a way that it can be called repeatedly on an already initialized
	* object without causing problems, or on a previously finished object
	* without crashing.
	*
	* \param[in,out] out The output functions structure.
	*
	* \return true on success, false on error.
	*/
	bool (init) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Free the private formatter-specific data.
	*
	* This is called from pcmk__output_free() and does not typically need to be
	* called directly.
	*
	* \param[in,out] out The output functions structure.
	*/
	void (free_priv) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Take whatever actions are necessary to end formatted output.
	*
	* This could include flushing output to a file, but does not include freeing
	* anything. The finish method can potentially be fairly complicated, adding
	* additional information to the internal data structures or doing whatever
	* else. It is therefore suggested that finish only be called once.
	*
	* \note The print parameter will only affect those formatters that do all
	* their output at the end. Console-oriented formatters typically print
	* a line at a time as they go, so this parameter will not affect them.
	* Structured formatters will honor it, however.
	*
	* \note The copy_dest parameter does not apply to all formatters. Console-
	* oriented formatters do not build up a structure as they go, and thus
	* do not have anything to return. Structured formatters will honor it,
	* however. Note that each type of formatter will return a different
	* type of value in this parameter. To use this parameter, call this
	* function like so:
	*
	* \code
	* xmlNode *dest = NULL;
	* out->finish(out, exit_code, false, (void **) &dest);
	* \endcode
	*
	* \param[in,out] out The output functions structure.
	* \param[in] exit_status The exit value of the whole program.
	* \param[in] print Whether this function should write any output.
	* \param[out] copy_dest A destination to store a copy of the internal
	* data structure for this output, or NULL if no
	* copy is required. The caller should free this
	* memory when done with it.
	*/
	void (finish) (pcmk__output_t out, crm_exit_t exit_status, bool print,
	void **copy_dest);

	/*!
	* \internal
	* \brief Finalize output and then immediately set back up to start a new set
	* of output.
	*
	* This is conceptually the same as calling finish and then init, though in
	* practice more be happening behind the scenes.
	*
	* \note This function differs from finish in that no exit_status is added.
	* The idea is that the program is not shutting down, so there is not
	* yet a final exit code. Call finish on the last time through if this
	* is needed.
	*
	* \param[in,out] out The output functions structure.
	*/
	void (reset) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Register a custom message.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] message_id The name of the message to register. This name
	* will be used as the message_id parameter to the
	* message function in order to call the custom
	* format function.
	* \param[in] fn The custom format function to call for message_id.
	*/
	void (register_message) (pcmk__output_t out, const char *message_id,
	pcmk__message_fn_t fn);

	/*!
	* \internal
	* \brief Call a previously registered custom message.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] message_id The name of the message to call. This name must
	* be the same as the message_id parameter of some
	* previous call to register_message.
	* \param[in] ... Arguments to be passed to the registered function.
	*
	* \return A standard Pacemaker return code. Generally: 0 if a function was
	* registered for the message, that function was called, and returned
	* successfully; EINVAL if no function was registered; or pcmk_rc_no_output
	* if a function was called but produced no output.
	*/
	int (message) (pcmk__output_t out, const char *message_id, ...);

	/*!
	* \internal
	* \brief Format the output of a completed subprocess.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] exit_status The exit value of the subprocess.
	* \param[in] proc_stdout stdout from the completed subprocess.
	* \param[in] proc_stderr stderr from the completed subprocess.
	*/
	void (subprocess_output) (pcmk__output_t out, int exit_status,
	const char proc_stdout, const char proc_stderr);

	/*!
	* \internal
	* \brief Format version information. This is useful for the --version
	* argument of command line tools.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] extended Add additional version information.
	*/
	void (version) (pcmk__output_t out, bool extended);

	/*!
	* \internal
	* \brief Format an informational message that should be shown to
	* to an interactive user. Not all formatters will do this.
	*
	* \note A newline will automatically be added to the end of the format
	* string, so callers should not include a newline.
	*
	* \note It is possible for a formatter that supports this method to
	* still not print anything out if is_quiet returns true.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] buf The message to be printed.
	* \param[in] ... Arguments to be formatted.
	*
	* \return A standard Pacemaker return code. Generally: pcmk_rc_ok
	* if output was produced and pcmk_rc_no_output if it was not.
	* As not all formatters implement this function, those that
	* do not will always just return pcmk_rc_no_output.
	*/
	int (info) (pcmk__output_t out, const char *format, ...) G_GNUC_PRINTF(2, 3);

	/*!
	* \internal
	* \brief Like \p info() but for messages that should appear only
	* transiently. Not all formatters will do this.
	*
	* The originally envisioned use case is for console output, where a
	* transient status-related message may be quickly overwritten by a refresh.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] format The format string of the message to be printed.
	* \param[in] ... Arguments to be formatted.
	*
	* \return A standard Pacemaker return code. Generally: \p pcmk_rc_ok if
	* output was produced and \p pcmk_rc_no_output if it was not. As
	* not all formatters implement this function, those that do not
	* will always just return \p pcmk_rc_no_output.
	*/
	int (transient) (pcmk__output_t out, const char *format, ...)
	G_GNUC_PRINTF(2, 3);

	/*!
	* \internal
	* \brief Format an error message that should be shown to an interactive
	* user. Not all formatters will do this.
	*
	* \note A newline will automatically be added to the end of the format
	* string, so callers should not include a newline.
	*
	* \note Formatters that support this method should always generate output,
	* even if is_quiet returns true.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] buf The message to be printed.
	* \param[in] ... Arguments to be formatted.
	*/
	void (err) (pcmk__output_t out, const char *format, ...) G_GNUC_PRINTF(2, 3);

	/*!
	* \internal
	* \brief Format already formatted XML.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] name A name to associate with the XML.
	* \param[in] buf The XML in a string.
	*/
	void (output_xml) (pcmk__output_t out, const char name, const char buf);

	/*!
	* \internal
	* \brief Start a new list of items.
	*
	* \note For text output, this corresponds to another level of indentation. For
	* XML output, this corresponds to wrapping any following output in another
	* layer of tags.
	*
	* \note If singular_noun and plural_noun are non-NULL, calling end_list will
	* result in a summary being added.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] singular_noun When outputting the summary for a list with
	* one item, the noun to use.
	* \param[in] plural_noun When outputting the summary for a list with
	* more than one item, the noun to use.
	* \param[in] format The format string.
	* \param[in] ... Arguments to be formatted.
	*/
	void (begin_list) (pcmk__output_t out, const char *singular_noun,
	const char plural_noun, const char format, ...)
	G_GNUC_PRINTF(4, 5);

	/*!
	* \internal
	* \brief Format a single item in a list.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] name A name to associate with this item.
	* \param[in] format The format string.
	* \param[in] ... Arguments to be formatted.
	*/
	void (list_item) (pcmk__output_t out, const char name, const char format, ...)
	G_GNUC_PRINTF(3, 4);

	/*!
	* \internal
	* \brief Increment the internal counter of the current list's length.
	*
	* Typically, this counter is maintained behind the scenes as a side effect
	* of calling list_item(). However, custom functions that maintain lists
	* some other way will need to manage this counter manually. This is
	* useful for implementing custom message functions and should not be
	* needed otherwise.
	*
	* \param[in,out] out The output functions structure.
	*/
	void (increment_list) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Conclude a list.
	*
	* \note If begin_list was called with non-NULL for both the singular_noun
	* and plural_noun arguments, this function will output a summary.
	* Otherwise, no summary will be added.
	*
	* \param[in,out] out The output functions structure.
	*/
	void (end_list) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Should anything be printed to the user?
	*
	* \note This takes into account both the \p quiet value as well as the
	* current formatter.
	*
	* \param[in,out] out The output functions structure.
	*
	* \return true if output should be supressed, false otherwise.
	*/
	bool (is_quiet) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Output a spacer. Not all formatters will do this.
	*
	* \param[in,out] out The output functions structure.
	*/
	void (spacer) (pcmk__output_t out);

	/*!
	* \internal
	* \brief Output a progress indicator. This is likely only useful for
	* plain text, console based formatters.
	*
	* \param[in,out] out The output functions structure
	* \param[in] end If true, output a newline afterwards (this should
	* only be used the last time this function is called)
	*
	*/
	void (progress) (pcmk__output_t out, bool end);

	/*!
	* \internal
	* \brief Prompt the user for input. Not all formatters will do this.
	*
	* \note This function is part of pcmk__output_t, but unlike all other
	* function it does not take that as an argument. In general, a
	* prompt will go directly to the screen and therefore bypass any
	* need to use the formatted output code to decide where and how
	* to display.
	*
	* \param[in] prompt The prompt to display. This is required.
	* \param[in] echo If true, echo the user's input to the screen. Set
	* to false for password entry.
	* \param[out] dest Where to store the user's response. This is
	* required.
	*/
	void (prompt) (const char prompt, bool echo, char **dest);
	};

	/*!
	* \internal
	* \brief Call a formatting function for a previously registered message.
	*
	* \note This function is for implementing custom formatters. It should not
	* be called directly. Instead, call out->message.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] message_id The message to be handled. Unknown messages
	* will be ignored.
	* \param[in] ... Arguments to be passed to the registered function.
	*/
	int
	pcmk__call_message(pcmk__output_t out, const char message_id, ...);

	/*!
	* \internal
	* \brief Free a ::pcmk__output_t structure that was previously created by
	* pcmk__output_new().
	*
	* \note While the create and finish functions are designed in such a way that
	* they can be called repeatedly, this function will completely free the
	* memory of the object. Once this function has been called, producing
	* more output requires starting over from pcmk__output_new().
	*
	* \param[in,out] out The output structure.
	*/
	void pcmk__output_free(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Create a new ::pcmk__output_t structure.
	*
	* This also registers message functions from libcrmcommon.
	*
	* \param[in,out] out The destination of the new ::pcmk__output_t.
	* \param[in] fmt_name How should output be formatted?
	* \param[in] filename Where should formatted output be written to? This
	* can be a filename (which will be overwritten if it
	* already exists), or NULL or "-" for stdout. For no
	* output, pass a filename of "/dev/null".
	* \param[in] argv The list of command line arguments.
	*
	* \return Standard Pacemaker return code
	*/
	int pcmk__output_new(pcmk__output_t *out, const char fmt_name,
	const char filename, char *argv);

	/*!
	* \internal
	* \brief Register a new output formatter, making it available for use
	* the same as a base formatter.
	*
	* \param[in,out] group A ::GOptionGroup that formatted output related command
	* line arguments should be added to. This can be NULL
	* for use outside of command line programs.
	* \param[in] name The name of the format. This will be used to select a
	* format from command line options and for displaying help.
	* \param[in] create A function that creates a ::pcmk__output_t.
	* \param[in] options Format-specific command line options. These will be
	* added to the context. This argument can also be NULL.
	*
	* \return Standard Pacemaker return code
	*/
	int
	pcmk__register_format(GOptionGroup group, const char name,
	pcmk__output_factory_t create,
	const GOptionEntry *options);

	/*!
	* \internal
	* \brief Register an entire table of output formatters at once.
	*
	* \param[in,out] group A ::GOptionGroup that formatted output related command
	* line arguments should be added to. This can be NULL
	* for use outside of command line programs.
	* \param[in] table An array of ::pcmk__supported_format_t which should
	* all be registered. This array must be NULL-terminated.
	*
	*/
	void
	pcmk__register_formats(GOptionGroup *group,
	const pcmk__supported_format_t *table);

	/*!
	* \internal
	* \brief Unregister a previously registered table of custom formatting
	* functions and destroy the internal data structures associated with them.
	*/
	void
	pcmk__unregister_formats(void);

	/*!
	* \internal
	* \brief Register a function to handle a custom message.
	*
	* \note This function is for implementing custom formatters. It should not
	* be called directly. Instead, call out->register_message.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] message_id The message to be handled.
	* \param[in] fn The custom format function to call for message_id.
	*/
	void
	pcmk__register_message(pcmk__output_t out, const char message_id,
	pcmk__message_fn_t fn);

	/*!
	* \internal
	* \brief Register an entire table of custom formatting functions at once.
	*
	* This table can contain multiple formatting functions for the same message ID
	* if they are for different format types.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] table An array of ::pcmk__message_entry_t values which should
	* all be registered. This array must be NULL-terminated.
	*/
	void
	pcmk__register_messages(pcmk__output_t *out,
	const pcmk__message_entry_t *table);

	/* Functions that are useful for implementing custom message formatters */

	void pcmk__output_text_set_fancy(pcmk__output_t *out, bool enabled);

	/*!
	* \internal
	* \brief A printf-like function.
	*
	* This function writes to out->dest and indents the text to the current level
	* of the text formatter's nesting. This function should be used when implementing
	* custom message functions for the text output format. It should not be used
	* for any other purpose.
	*
	* Typically, this function should be used instead of printf.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] format The format string.
	* \param[in] ... Arguments to be passed to the format string.
	*/
	void
	pcmk__indented_printf(pcmk__output_t out, const char format, ...) G_GNUC_PRINTF(2, 3);

	/*!
	* \internal
	* \brief A vprintf-like function.
	*
	* This function is like pcmk__indented_printf(), except it takes a va_list instead
	* of a list of arguments. This function should be used when implementing custom
	* functions for the text output format. It should not be used for any other purpose.
	*
	* Typically, this function should be used instead of vprintf.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] format The format string.
	* \param[in] args A list of arguments to apply to the format string.
	*/
	void
	pcmk__indented_vprintf(pcmk__output_t out, const char format, va_list args) G_GNUC_PRINTF(2, 0);


	/*!
	* \internal
	* \brief A printf-like function.
	*
	* This function writes to out->dest without indenting the text. This function
	* should be used when implementing custom message functions for the text output
	* format. It should not be used for any other purpose.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] format The format string.
	* \param[in] ... Arguments to be passed to the format string.
	*/
	void
	pcmk__formatted_printf(pcmk__output_t out, const char format, ...) G_GNUC_PRINTF(2, 3);

	/*!
	* \internal
	* \brief A vprintf-like function.
	*
	* This function is like pcmk__formatted_printf(), except it takes a va_list instead
	* of a list of arguments. This function should be used when implementing custom
	* message functions for the text output format. It should not be used for any
	* other purpose.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] format The format string.
	* \param[in] args A list of arguments to apply to the format string.
	*/
	void
	pcmk__formatted_vprintf(pcmk__output_t out, const char format, va_list args) G_GNUC_PRINTF(2, 0);

	/*!
	* \internal
	* \brief Prompt the user for input.
	*
	* \param[in] prompt The prompt to display
	* \param[in] echo If true, echo the user's input to the screen. Set
	* to false for password entry.
	* \param[out] dest Where to store the user's response.
	*/
	void
	pcmk__text_prompt(const char prompt, bool echo, char *dest);

	uint8_t
	pcmk__output_get_log_level(const pcmk__output_t *out);

	void
	pcmk__output_set_log_level(pcmk__output_t *out, uint8_t log_level);

	void pcmk__output_set_log_filter(pcmk__output_t out, const char file,
	const char *function, uint32_t line,
	uint32_t tags);


	/*!
	* \internal
	* \brief Create and return a new XML node with the given name, as a child of the
	* current list parent. The new node is then added as the new list parent,
	* meaning all subsequent nodes will be its children. This is used when
	* implementing custom functions.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] name The name of the node to be created.
	* \param[in] ... Name/value pairs to set as XML properties.
	*/
	xmlNodePtr
	pcmk__output_xml_create_parent(pcmk__output_t out, const char name, ...)
	G_GNUC_NULL_TERMINATED;

	/*!
	* \internal
	* \brief Add a copy of the given node as a child of the current list parent.
	* This is used when implementing custom message functions.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] node An XML node to copy as a child.
	*/
	void
	pcmk__output_xml_add_node_copy(pcmk__output_t *out, xmlNodePtr node);

	/*!
	* \internal
	* \brief Create and return a new XML node with the given name, as a child of the
	* current list parent. This is used when implementing custom functions.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] name The name of the node to be created.
	* \param[in] ... Name/value pairs to set as XML properties.
	*/
	xmlNodePtr
	pcmk__output_create_xml_node(pcmk__output_t out, const char name, ...)
	G_GNUC_NULL_TERMINATED;

	/*!
	* \internal
	* \brief Like pcmk__output_create_xml_node(), but add the given text content to the
	* new node.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] name The name of the node to be created.
	* \param[in] content The text content of the node.
	*/
	xmlNodePtr
	pcmk__output_create_xml_text_node(pcmk__output_t out, const char name, const char *content);

	/*!
	* \internal
	* \brief Push a parent XML node onto the stack. This is used when implementing
	* custom message functions.
	*
	* The XML output formatter maintains an internal stack to keep track of which nodes
	* are parents in order to build up the tree structure. This function can be used
	* to temporarily push a new node onto the stack. After calling this function, any
	* other formatting functions will have their nodes added as children of this new
	* parent.
	*
	* \param[in,out] out The output functions structure
	* \param[in] parent XML node to add
	*/
	void
	pcmk__output_xml_push_parent(pcmk__output_t *out, xmlNodePtr parent);

	/*!
	* \internal
	* \brief Pop a parent XML node onto the stack. This is used when implementing
	* custom message functions.
	*
	* This function removes a parent node from the stack. See pcmk__xml_push_parent()
	* for more details.
	*
	* \note Little checking is done with this function. Be sure you only pop parents
	* that were previously pushed. In general, it is best to keep the code between
	* push and pop simple.
	*
	* \param[in,out] out The output functions structure.
	*/
	void
	pcmk__output_xml_pop_parent(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Peek a parent XML node onto the stack. This is used when implementing
	* custom message functions.
	*
	* This function peeks a parent node on stack. See pcmk__xml_push_parent()
	* for more details. It has no side-effect and can be called for an empty stack.
	*
	* \note Little checking is done with this function.
	*
	* \param[in,out] out The output functions structure.
	*
	* \return NULL if stack is empty, otherwise the parent of the stack.
	*/
	xmlNodePtr
	pcmk__output_xml_peek_parent(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Create a new XML node consisting of the provided text inside an HTML
	* element node of the given name.
	*
	* \param[in,out] out The output functions structure.
	* \param[in] element_name The name of the new HTML element.
	* \param[in] id The CSS ID selector to apply to this element.
	* If NULL, no ID is added.
	* \param[in] class_name The CSS class selector to apply to this element.
	* If NULL, no class is added.
	* \param[in] text The text content of the node.
	*/
	xmlNodePtr
	pcmk__output_create_html_node(pcmk__output_t out, const char element_name, const char *id,
	const char class_name, const char text);

	xmlNode pcmk__html_create(xmlNode parent, const char name, const char id,
	- const char *class);
	+ const char *class_name);

	/*!
	* \internal
	* \brief Add an HTML tag to the <head> section.
	*
	* The arguments after name are a NULL-terminated list of keys and values,
	* all of which will be added as attributes to the given tag. For instance,
	* the following code would generate the tag
	* "<meta http-equiv='refresh' content='19'>":
	*
	* \code
	* pcmk__html_add_header(PCMK__XE_META,
	* PCMK__XA_HTTP_EQUIV, PCMK__VALUE_REFRESH,
	* PCMK__XA_CONTENT, "19",
	* NULL);
	* \endcode
	*
	* \param[in] name The HTML tag for the new node.
	* \param[in] ... A NULL-terminated key/value list of attributes.
	*/
	void
	pcmk__html_add_header(const char *name, ...)
	G_GNUC_NULL_TERMINATED;

	/*!
	* \internal
	* \brief Handle end-of-program error reporting
	*
	* \param[in,out] error A GError object potentially containing some error.
	* If NULL, do nothing.
	* \param[in,out] out The output functions structure. If NULL, any errors
	* will simply be printed to stderr.
	*/
	void pcmk__output_and_clear_error(GError *error, pcmk__output_t out);

	int pcmk__xml_output_new(pcmk__output_t *out, xmlNodePtr xml);
	void pcmk__xml_output_finish(pcmk__output_t out, crm_exit_t exit_status, xmlNodePtr xml);
	int pcmk__log_output_new(pcmk__output_t **out);
	int pcmk__text_output_new(pcmk__output_t *out, const char filename);

	/*!
	* \internal
	* \brief Check whether older style XML output is enabled
	*
	* The legacy flag should be used sparingly. Its meaning depends on the context
	* in which it's used.
	*
	* \param[in] out Output object
	*
	* \return \c true if the \c legacy_xml flag is enabled for \p out, or \c false
	* otherwise
	*/
	// @COMPAT This can be removed when `crm_mon -X` and daemon metadata are removed
	bool pcmk__output_get_legacy_xml(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Enable older style XML output
	*
	* The legacy flag should be used sparingly. Its meaning depends on the context
	* in which it's used.
	*
	* \param[in,out] out Output object
	*/
	// @COMPAT This can be removed when `crm_mon -X` and daemon metadata are removed
	void pcmk__output_set_legacy_xml(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Enable using the <list> element for lists
	*
	* \note This function is only used in limited places and should not be
	* used anywhere new. We are trying to discourage and ultimately remove
	* uses of this style of list.
	*
	* @COMPAT This can be removed when the stonith_admin and crm_resource
	* schemas can be changed
	*/
	void pcmk__output_enable_list_element(pcmk__output_t *out);

	/*!
	* \internal
	* \brief Select an updated return code for an operation on a \p pcmk__output_t
	*
	* This function helps to keep an up-to-date record of the most relevant return
	* code from a series of operations on a \p pcmk__output_t object. For example,
	* suppose the object has already produced some output, and we've saved a
	* \p pcmk_rc_ok return code. A new operation did not produce any output and
	* returned \p pcmk_rc_no_output. We can ignore the new \p pcmk_rc_no_output
	* return code and keep the previous \p pcmk_rc_ok return code.
	*
	* It prioritizes return codes as follows (from highest to lowest priority):
	* 1. Other return codes (unexpected errors)
	* 2. \p pcmk_rc_ok
	* 3. \p pcmk_rc_no_output
	*
	* \param[in] old_rc Saved return code from \p pcmk__output_t operations
	* \param[in] new_rc New return code from a \p pcmk__output_t operation
	*
	* \retval \p old_rc \p new_rc is \p pcmk_rc_no_output, or \p new_rc is
	* \p pcmk_rc_ok and \p old_rc is not \p pcmk_rc_no_output
	* \retval \p new_rc Otherwise
	*/
	static inline int
	pcmk__output_select_rc(int old_rc, int new_rc)
	{
	switch (new_rc) {
	case pcmk_rc_no_output:
	return old_rc;
	case pcmk_rc_ok:
	switch (old_rc) {
	case pcmk_rc_no_output:
	return new_rc;
	default:
	return old_rc;
	}
	default:
	return new_rc;
	}
	}

	#if defined(PCMK__UNIT_TESTING)
	/* If we are building libcrmcommon_test.a, add this accessor function so we can
	* inspect the internal formatters hash table.
	*/
	GHashTable *pcmk__output_formatters(void);
	#endif

	#define PCMK__OUTPUT_SPACER_IF(out_obj, cond) \
	if (cond) { \
	out->spacer(out); \
	}

	#define PCMK__OUTPUT_LIST_HEADER(out_obj, cond, retcode, title...) \
	if (retcode == pcmk_rc_no_output) { \
	PCMK__OUTPUT_SPACER_IF(out_obj, cond); \
	retcode = pcmk_rc_ok; \
	out_obj->begin_list(out_obj, NULL, NULL, title); \
	}

	#define PCMK__OUTPUT_LIST_FOOTER(out_obj, retcode) \
	if (retcode == pcmk_rc_ok) { \
	out_obj->end_list(out_obj); \
	}

	#ifdef __cplusplus
	}
	#endif

	#endif // PCMK__CRM_COMMON_OUTPUT_INTERNAL__H
	diff --git a/lib/common/output_html.c b/lib/common/output_html.c
	index 177ccce784..4611665624 100644
	--- a/lib/common/output_html.c
	+++ b/lib/common/output_html.c
	@@ -1,519 +1,519 @@
	/*
	* Copyright 2019-2024 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU Lesser General Public License
	* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#include <ctype.h>
	#include <libxml/HTMLtree.h>
	#include <stdarg.h>
	#include <stdlib.h>
	#include <stdio.h>

	#include <crm/common/cmdline_internal.h>
	#include <crm/common/xml.h>

	static const char *stylesheet_default =
	"." PCMK__VALUE_BOLD " { font-weight: bold }\n"

	"." PCMK_VALUE_ONLINE " { color: green }\n"
	"." PCMK_VALUE_OFFLINE " { color: red }\n"
	"." PCMK__VALUE_MAINT " { color: blue }\n"
	"." PCMK_VALUE_STANDBY " { color: blue }\n"
	"." PCMK__VALUE_HEALTH_RED " { color: red }\n"
	"." PCMK__VALUE_HEALTH_YELLOW " { color: GoldenRod }\n"

	"." PCMK__VALUE_RSC_FAILED " { color: red }\n"
	"." PCMK__VALUE_RSC_FAILURE_IGNORED " { color: DarkGreen }\n"
	"." PCMK__VALUE_RSC_MANAGED " { color: blue }\n"
	"." PCMK__VALUE_RSC_MULTIPLE " { color: orange }\n"
	"." PCMK__VALUE_RSC_OK " { color: green }\n"

	"." PCMK__VALUE_WARNING " { color: red; font-weight: bold }";

	static gboolean cgi_output = FALSE;
	static char *stylesheet_link = NULL;
	static char *title = NULL;
	static GSList *extra_headers = NULL;

	GOptionEntry pcmk__html_output_entries[] = {
	{ "html-cgi", 0, 0, G_OPTION_ARG_NONE, &cgi_output,
	"Add CGI headers (requires --output-as=html)",
	NULL },

	{ "html-stylesheet", 0, 0, G_OPTION_ARG_STRING, &stylesheet_link,
	"Link to an external stylesheet (requires --output-as=html)",
	"URI" },

	{ "html-title", 0, 0, G_OPTION_ARG_STRING, &title,
	"Specify a page title (requires --output-as=html)",
	"TITLE" },

	{ NULL }
	};

	/* The first several elements of this struct must be the same as the first
	* several elements of private_data_s in lib/common/output_xml.c. This
	* struct gets passed to a bunch of the pcmk__output_xml_* functions which
	* assume an XML private_data_s. Keeping them laid out the same means this
	* still works.
	*/
	typedef struct private_data_s {
	/* Begin members that must match the XML version */
	xmlNode *root;
	GQueue *parent_q;
	GSList *errors;
	/* End members that must match the XML version */
	} private_data_t;

	static void
	html_free_priv(pcmk__output_t *out) {
	private_data_t *priv = NULL;

	if (out == NULL \|\| out->priv == NULL) {
	return;
	}

	priv = out->priv;

	pcmk__xml_free(priv->root);
	/* The elements of parent_q are xmlNodes that are a part of the
	* priv->root document, so the above line already frees them. Don't
	* call g_queue_free_full here.
	*/
	g_queue_free(priv->parent_q);
	g_slist_free_full(priv->errors, free);
	free(priv);
	out->priv = NULL;
	}

	static bool
	html_init(pcmk__output_t *out) {
	private_data_t *priv = NULL;

	CRM_ASSERT(out != NULL);

	/* If html_init was previously called on this output struct, just return. */
	if (out->priv != NULL) {
	return true;
	} else {
	out->priv = calloc(1, sizeof(private_data_t));
	if (out->priv == NULL) {
	return false;
	}

	priv = out->priv;
	}

	priv->parent_q = g_queue_new();

	priv->root = pcmk__xe_create(NULL, "html");
	xmlCreateIntSubset(priv->root->doc, (pcmkXmlStr) "html", NULL, NULL);

	crm_xml_add(priv->root, PCMK_XA_LANG, PCMK__VALUE_EN);
	g_queue_push_tail(priv->parent_q, priv->root);
	priv->errors = NULL;

	pcmk__output_xml_create_parent(out, "body", NULL);

	return true;
	}

	static void
	add_error_node(gpointer data, gpointer user_data) {
	char str = (char ) data;
	pcmk__output_t out = (pcmk__output_t ) user_data;
	out->list_item(out, NULL, "%s", str);
	}

	static void
	html_finish(pcmk__output_t out, crm_exit_t exit_status, bool print, void *copy_dest) {
	private_data_t *priv = NULL;
	htmlNodePtr head_node = NULL;
	htmlNodePtr charset_node = NULL;
	xmlNode *child_node = NULL;

	CRM_ASSERT(out != NULL);

	priv = out->priv;

	/* If root is NULL, html_init failed and we are being called from pcmk__output_free
	* in the pcmk__output_new path.
	*/
	if (priv == NULL \|\| priv->root == NULL) {
	return;
	}

	if (cgi_output && print) {
	fprintf(out->dest, "Content-Type: text/html\n\n");
	}

	/* Add the head node last - it's not needed earlier because it doesn't contain
	* anything else that the user could add, and we want it done last to pick up
	* any options that may have been given.
	*/
	head_node = xmlNewDocRawNode(NULL, NULL, (pcmkXmlStr) "head", NULL);

	if (title != NULL ) {
	child_node = pcmk__xe_create(head_node, "title");
	pcmk__xe_set_content(child_node, "%s", title);
	} else if (out->request != NULL) {
	child_node = pcmk__xe_create(head_node, "title");
	pcmk__xe_set_content(child_node, "%s", out->request);
	}

	charset_node = pcmk__xe_create(head_node, PCMK__XE_META);
	crm_xml_add(charset_node, "charset", "utf-8");

	/* Add any extra header nodes the caller might have created. */
	for (int i = 0; i < g_slist_length(extra_headers); i++) {
	xmlAddChild(head_node, xmlCopyNode(g_slist_nth_data(extra_headers, i), 1));
	}

	/* Stylesheets are included two different ways. The first is via a built-in
	* default (see the stylesheet_default const above). The second is via the
	* html-stylesheet option, and this should obviously be a link to a
	* stylesheet. The second can override the first. At least one should be
	* given.
	*/
	child_node = pcmk__xe_create(head_node, "style");
	pcmk__xe_set_content(child_node, "%s", stylesheet_default);

	if (stylesheet_link != NULL) {
	htmlNodePtr link_node = pcmk__xe_create(head_node, "link");
	pcmk__xe_set_props(link_node, "rel", "stylesheet",
	"href", stylesheet_link,
	NULL);
	}

	xmlAddPrevSibling(priv->root->children, head_node);

	if (g_slist_length(priv->errors) > 0) {
	out->begin_list(out, "Errors", NULL, NULL);
	g_slist_foreach(priv->errors, add_error_node, (gpointer) out);
	out->end_list(out);
	}

	if (print) {
	htmlDocDump(out->dest, priv->root->doc);
	}

	if (copy_dest != NULL) {
	*copy_dest = pcmk__xml_copy(NULL, priv->root);
	}

	g_slist_free_full(extra_headers, (GDestroyNotify) xmlFreeNode);
	extra_headers = NULL;
	}

	static void
	html_reset(pcmk__output_t *out) {
	CRM_ASSERT(out != NULL);

	out->dest = freopen(NULL, "w", out->dest);
	CRM_ASSERT(out->dest != NULL);

	html_free_priv(out);
	html_init(out);
	}

	static void
	html_subprocess_output(pcmk__output_t *out, int exit_status,
	const char proc_stdout, const char proc_stderr) {
	char *rc_buf = NULL;

	CRM_ASSERT(out != NULL);

	rc_buf = crm_strdup_printf("Return code: %d", exit_status);

	pcmk__output_create_xml_text_node(out, "h2", "Command Output");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL, rc_buf);

	if (proc_stdout != NULL) {
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL, "Stdout");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL,
	PCMK__VALUE_OUTPUT, proc_stdout);
	}
	if (proc_stderr != NULL) {
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL, "Stderr");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL,
	PCMK__VALUE_OUTPUT, proc_stderr);
	}

	free(rc_buf);
	}

	static void
	html_version(pcmk__output_t *out, bool extended) {
	CRM_ASSERT(out != NULL);

	pcmk__output_create_xml_text_node(out, "h2", "Version Information");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL,
	"Program: Pacemaker");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL,
	"Version: " PACEMAKER_VERSION);
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL,
	"Author: Andrew Beekhof and "
	"the Pacemaker project contributors");
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL,
	"Build: " BUILD_VERSION);
	pcmk__output_create_html_node(out, PCMK__XE_DIV, NULL, NULL,
	"Features: " CRM_FEATURES);
	}

	G_GNUC_PRINTF(2, 3)
	static void
	html_err(pcmk__output_t out, const char format, ...) {
	private_data_t *priv = NULL;
	int len = 0;
	char *buf = NULL;
	va_list ap;

	CRM_ASSERT(out != NULL && out->priv != NULL);
	priv = out->priv;

	va_start(ap, format);
	len = vasprintf(&buf, format, ap);
	CRM_ASSERT(len >= 0);
	va_end(ap);

	priv->errors = g_slist_append(priv->errors, buf);
	}

	G_GNUC_PRINTF(2, 3)
	static int
	html_info(pcmk__output_t out, const char format, ...) {
	return pcmk_rc_no_output;
	}

	static void
	html_output_xml(pcmk__output_t out, const char name, const char *buf) {
	htmlNodePtr node = NULL;

	CRM_ASSERT(out != NULL);

	node = pcmk__output_create_html_node(out, "pre", NULL, NULL, buf);
	crm_xml_add(node, PCMK_XA_LANG, "xml");
	}

	G_GNUC_PRINTF(4, 5)
	static void
	html_begin_list(pcmk__output_t out, const char singular_noun,
	const char plural_noun, const char format, ...) {
	int q_len = 0;
	private_data_t *priv = NULL;
	xmlNodePtr node = NULL;

	CRM_ASSERT(out != NULL && out->priv != NULL);
	priv = out->priv;

	/* If we are already in a list (the queue depth is always at least
	* one because of the <html> element), first create a <li> element
	* to hold the <h2> and the new list.
	*/
	q_len = g_queue_get_length(priv->parent_q);
	if (q_len > 2) {
	pcmk__output_xml_create_parent(out, "li", NULL);
	}

	if (format != NULL) {
	va_list ap;
	char *buf = NULL;
	int len;

	va_start(ap, format);
	len = vasprintf(&buf, format, ap);
	va_end(ap);
	CRM_ASSERT(len >= 0);

	if (q_len > 2) {
	pcmk__output_create_xml_text_node(out, "h3", buf);
	} else {
	pcmk__output_create_xml_text_node(out, "h2", buf);
	}

	free(buf);
	}

	node = pcmk__output_xml_create_parent(out, "ul", NULL);
	g_queue_push_tail(priv->parent_q, node);
	}

	G_GNUC_PRINTF(3, 4)
	static void
	html_list_item(pcmk__output_t out, const char name, const char *format, ...) {
	htmlNodePtr item_node = NULL;
	va_list ap;
	char *buf = NULL;
	int len;

	CRM_ASSERT(out != NULL);

	va_start(ap, format);
	len = vasprintf(&buf, format, ap);
	CRM_ASSERT(len >= 0);
	va_end(ap);

	item_node = pcmk__output_create_xml_text_node(out, "li", buf);
	free(buf);

	if (name != NULL) {
	crm_xml_add(item_node, PCMK_XA_CLASS, name);
	}
	}

	static void
	html_increment_list(pcmk__output_t *out) {
	/* This function intentially left blank */
	}

	static void
	html_end_list(pcmk__output_t *out) {
	private_data_t *priv = NULL;

	CRM_ASSERT(out != NULL && out->priv != NULL);
	priv = out->priv;

	/* Remove the <ul> tag, but do not free this result - it's still
	* part of the document.
	*/
	g_queue_pop_tail(priv->parent_q);
	pcmk__output_xml_pop_parent(out);

	/* Remove the <li> created for nested lists. */
	if (g_queue_get_length(priv->parent_q) > 2) {
	pcmk__output_xml_pop_parent(out);
	}
	}

	static bool
	html_is_quiet(pcmk__output_t *out) {
	return false;
	}

	static void
	html_spacer(pcmk__output_t *out) {
	CRM_ASSERT(out != NULL);
	pcmk__output_create_xml_node(out, "br", NULL);
	}

	static void
	html_progress(pcmk__output_t *out, bool end) {
	/* This function intentially left blank */
	}

	pcmk__output_t *
	pcmk__mk_html_output(char **argv) {
	pcmk__output_t *retval = calloc(1, sizeof(pcmk__output_t));

	if (retval == NULL) {
	return NULL;
	}

	retval->fmt_name = "html";
	retval->request = pcmk__quote_cmdline(argv);

	retval->init = html_init;
	retval->free_priv = html_free_priv;
	retval->finish = html_finish;
	retval->reset = html_reset;

	retval->register_message = pcmk__register_message;
	retval->message = pcmk__call_message;

	retval->subprocess_output = html_subprocess_output;
	retval->version = html_version;
	retval->info = html_info;
	retval->transient = html_info;
	retval->err = html_err;
	retval->output_xml = html_output_xml;

	retval->begin_list = html_begin_list;
	retval->list_item = html_list_item;
	retval->increment_list = html_increment_list;
	retval->end_list = html_end_list;

	retval->is_quiet = html_is_quiet;
	retval->spacer = html_spacer;
	retval->progress = html_progress;
	retval->prompt = pcmk__text_prompt;

	return retval;
	}

	xmlNodePtr
	pcmk__output_create_html_node(pcmk__output_t out, const char element_name, const char *id,
	const char class_name, const char text) {
	htmlNodePtr node = NULL;

	CRM_ASSERT(out != NULL);
	CRM_CHECK(pcmk__str_eq(out->fmt_name, "html", pcmk__str_none), return NULL);

	node = pcmk__output_create_xml_text_node(out, element_name, text);

	if (class_name != NULL) {
	crm_xml_add(node, PCMK_XA_CLASS, class_name);
	}

	if (id != NULL) {
	crm_xml_add(node, PCMK_XA_ID, id);
	}

	return node;
	}

	/*!
	* \internal
	* \brief Create a new HTML element under a given parent with ID and class
	*
	- * \param[in,out] parent XML element that will be the new element's parent
	- * (\c NULL to create a new XML document with the new
	- * node as root)
	- * \param[in] name Name of new element
	- * \param[in] id CSS ID of new element (can be \c NULL)
	- * \param[in] class CSS class of new element (can be \c NULL)
	+ * \param[in,out] parent XML element that will be the new element's parent
	+ * (\c NULL to create a new XML document with the new
	+ * node as root)
	+ * \param[in] name Name of new element
	+ * \param[in] id CSS ID of new element (can be \c NULL)
	+ * \param[in] class_name CSS class of new element (can be \c NULL)
	*
	* \return Newly created XML element (guaranteed not to be \c NULL)
	*/
	xmlNode *
	pcmk__html_create(xmlNode parent, const char name, const char *id,
	- const char *class)
	+ const char *class_name)
	{
	xmlNode *node = pcmk__xe_create(parent, name);

	pcmk__xe_set_props(node,
	- PCMK_XA_CLASS, class,
	+ PCMK_XA_CLASS, class_name,
	PCMK_XA_ID, id,
	NULL);
	return node;
	}

	void
	pcmk__html_add_header(const char *name, ...) {
	htmlNodePtr header_node;
	va_list ap;

	va_start(ap, name);

	header_node = xmlNewDocRawNode(NULL, NULL, (pcmkXmlStr) name, NULL);
	while (1) {
	char key = va_arg(ap, char );
	char *value;

	if (key == NULL) {
	break;
	}

	value = va_arg(ap, char *);
	crm_xml_add(header_node, key, value);
	}

	extra_headers = g_slist_append(extra_headers, header_node);

	va_end(ap);
	}

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