docs/159898: [patch] libusb.3 whitespace, markup, grammar fixes

[Benjamin Kaduk]

On Fri, 19 Aug 2011, Ben Kaduk wrote:

>
>> Description:
> libusb.3 started out with a lot of long lines, sentences starting in the middle of lines, trailing whitespace, and ignored lines consisting of just '.'.  Mechanical fixes for these issues are in one patch.
> There are also many grammar and consistency issues in the man page, which are fixed in a second patch.  I'll attach the grammar patch in the webform and send the whitespace diff as an update to the ticket.  (The grammar patch applies on top of the whitespace patch, though.)

The whitespace patch.
(Note that there was at least one line '. ', if the '.' lines are to be 
kept for some reason.)

-Ben Kaduk
-------------- next part --------------
--- libusb.3.orig	2011-08-18 11:28:50.000000000 -0400
+++ libusb.3.whitespace	2011-08-18 13:42:48.000000000 -0400
@@ -31,165 +31,123 @@
 .Os
 .Sh NAME
 .Nm libusb
-.
 .Nd "USB access library"
-.
-.
 .Sh LIBRARY
-.
-.
 USB access library (libusb -lusb)
-.
-.
 .Sh SYNOPSIS
-.
-.
 .In libusb.h
-.
-.
 .Sh DESCRIPTION
 The
 .Nm
 library contains interfaces for directly managing a usb device.
 The current implementation supports v1.0 of the libusb API.
-.
-.
 .Sh LIBRARY INITIALISATION / DEINITIALISATION
-.
 .Pp
-.
 .Ft int
 .Fn libusb_init libusb_context **ctx
-This function initialises libusb. Must be called at the beginning
-of the program. This function returns 0 on success or LIBUSB_ERROR on 
+This function initialises libusb.
+Must be called at the beginning
+of the program.
+This function returns 0 on success or LIBUSB_ERROR on
 failure.
-. 
 .Pp
-.
 .Ft void
 .Fn libusb_exit "libusb_context *ctx"
-Deinitialise libusb. Must be called at the end of the application.
-.
+Deinitialise libusb.
+Must be called at the end of the application.
 .Pp
-.
 .Ft const char *
 .Fn libusb_strerror "int code"
 Get ASCII representation of the error given by the
 .Fa code
 argument.
-.
-.
 .Pp
-.
 .Ft void
 .Fn libusb_set_debug "libusb_context *ctx" "int level"
 Set debug to the
 .Fa level
 level.
-.
 .Pp
-.
 .Ft ssize_t
 .Fn libusb_get_device_list "libusb_context *ctx" "libusb_device ***list"
 Fill into
-.Fa list 
-the list of usb device available. All the device created by this
-function must be unref and free when you are done with them. This
+.Fa list
+the list of usb device available.
+All the device created by this
+function must be unref and free when you are done with them.
+This
 function returns the number of devices in list or a LIBUSB_ERROR code.
-.
 .Pp
-.
 .Ft void
 .Fn libusb_free_device_list "libusb_device **list" "int unref_devices"
-Free the list of devices discovered by libusb_get_device_list. If 
+Free the list of devices discovered by libusb_get_device_list.
+If
 .Fa unref_device
 is set to 1 all devices are unref one time.
-.
 .Pp
-.
 .Ft uint8_t
 .Fn libusb_get_bus_number "libusb_device *dev"
 Returns the number of the bus contained by the device
 .Fa dev.
-.
 .Pp
-.
 .Ft uint8_t
 .Fn libusb_get_device_address "libusb_device *dev"
 Returns the device_address contained by the device
 .Fa dev.
-.
 .Pp
-.
 .Ft enum libusb_speed
 .Fn libusb_get_device_speed "libusb_device *dev"
 Returns the wire speed at which the device is connected.
 See the LIBUSB_SPEED_XXX enums for more information.
 LIBUSB_SPEED_UNKNOWN is returned in case of unknown wire speed.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_get_max_packet_size "libusb_device *dev" "unsigned char endpoint"
-Returns the wMaxPacketSize value on success, LIBUSB_ERROR_NOT_FOUND if the 
+Returns the wMaxPacketSize value on success, LIBUSB_ERROR_NOT_FOUND if the
 endpoint does not exist and LIBUSB_ERROR_OTHERS on other failure.
-.
 .Pp
-.
 .Ft libusb_device *
 .Fn libusb_ref_device "libusb_device *dev"
 Increment the reference counter of the device
 .Fa dev.
-.
 .Pp
-.
 .Ft void
 .Fn libusb_unref_device "libusb_device *dev"
 Decrement the reference counter of the device
 .Fa dev.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_open "libusb_device *dev" "libusb_device_handle **devh"
-Open a device and obtain a device_handle. Returns 0 on success, 
-LIBUSB_ERROR_NO_MEM on memory allocation problem, LIBUSB_ERROR_ACCESS 
-on permission problem, LIBUSB_ERROR_NO_DEVICE if the device has been 
+Open a device and obtain a device_handle.
+Returns 0 on success,
+LIBUSB_ERROR_NO_MEM on memory allocation problem, LIBUSB_ERROR_ACCESS
+on permission problem, LIBUSB_ERROR_NO_DEVICE if the device has been
 disconnected and a LIBUSB_ERROR code on error.
-.
 .Pp
-.
 .Ft libusb_device_handle *
 .Fn libusb_open_device_with_vid_pid "libusb_context *ctx" "uint16_t vid" "uint16_t pid"
-Convenience function to open a device with is 
-.Fa vid 
-and 
+Convenience function to open a device with is
+.Fa vid
+and
 .Fa pid.
 Returns NULL on error.
-.
 .Pp
-.
 .Ft void
 .Fn libusb_close "libusb_device_handle *devh"
 Close a device handle.
-.
 .Pp
-.
 .Ft libusb_device *
 .Fn libusb_get_device "libusb_device_handle *devh"
 Get the device contained by devh.
 Returns NULL on error.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_get_configuration "libusb_device_handle *devh" "int *config"
-Returns the bConfiguration value of the current configuration. Returns 0
-on success, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected 
+Returns the bConfiguration value of the current configuration.
+Returns 0
+on success, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected
 and a LIBUSB_ERROR code on error.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_set_configuration "libusb_device_handle *devh" "int config"
 Set the active configuration
@@ -197,73 +155,66 @@
 for the device contained by
 .Fa devh.
 This function returns 0 on success, LIBUSB_ERROR_NOT_FOUND if the requested
-configuration does not exist, LIBUSB_ERROR_BUSY if the interfaces are currently 
-claimed, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and a 
+configuration does not exist, LIBUSB_ERROR_BUSY if the interfaces are currently
+claimed, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and a
 LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_claim_interface "libusb_device_handle *devh" "int interface_number"
 Claim an interface in a given libusb_handle
 .Fa devh.
-This is a non-blocking function. It returns 0 success, LIBUSB_ERROR_NOT_FOUND 
-if the requested interface does not exist, LIBUSB_ERROR_BUSY if a program or 
-driver has claimed the interface, LIBUSB_ERROR_NO_DEVICE if the device has 
+This is a non-blocking function.
+It returns 0 success, LIBUSB_ERROR_NOT_FOUND
+if the requested interface does not exist, LIBUSB_ERROR_BUSY if a program or
+driver has claimed the interface, LIBUSB_ERROR_NO_DEVICE if the device has
 been disconnected and a LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_release_interface "libusb_device_handle *devh" "int interface_number"
-This function release an interface. All the claimed interface must be released
-before closing a device. Returns 0 on success, LIBUSB_ERROR_NOT_FOUND if the 
-interface was not claimed, LIBUSB_ERROR_NO_DEVICE if the device has been 
+This function release an interface.
+All the claimed interface must be released
+before closing a device.
+Returns 0 on success, LIBUSB_ERROR_NOT_FOUND if the
+interface was not claimed, LIBUSB_ERROR_NO_DEVICE if the device has been
 disconnected and LIBUSB_ERROR on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_set_interface_alt_setting "libusb_device_handle *dev" "int interface_number" "int alternate_setting"
-Activate an alternate setting for an interface. Returns 0 on success, 
-LIBUSB_ERROR_NOT_FOUND if the interface was not claimed or the requested 
-setting does not exist, LIBUSB_ERROR_NO_DEVICE if the device has been 
+Activate an alternate setting for an interface.
+Returns 0 on success,
+LIBUSB_ERROR_NOT_FOUND if the interface was not claimed or the requested
+setting does not exist, LIBUSB_ERROR_NO_DEVICE if the device has been
 disconnected and LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_clear_halt "libusb_device_handle *devh" "unsigned char endpoint"
-Clear an halt/stall for a endpoint. Returns 0 on success, LIBUSB_ERROR_NOT_FOUND
-if the endpoint does not exist, LIBUSB_ERROR_NO_DEVICE if the device has been 
+Clear an halt/stall for a endpoint.
+Returns 0 on success, LIBUSB_ERROR_NOT_FOUND
+if the endpoint does not exist, LIBUSB_ERROR_NO_DEVICE if the device has been
 disconnected and a LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_reset_device "libusb_device_handle *devh"
-Perform an USB port reset for an usb device. Returns 0 on success,
+Perform an USB port reset for an usb device.
+Returns 0 on success,
 LIBUSB_ERROR_NOT_FOUND if re-enumeration is required or if the device has
 been disconnected and a LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_check_connected "libusb_device_handle *devh"
-Test if USB device is still connected. Returns 0 on success,
+Test if USB device is still connected.
+Returns 0 on success,
 LIBUSB_ERROR_NO_DEVICE if has been disconnected and a LIBUSB_ERROR
 code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_kernel_driver_active "libusb_device_handle *devh" "int interface"
-Determine if a driver is active on a interface. Returns 0 if no kernel driver
-is active, returns 1 if a kernel driver is active, returns LIBUSB_ERROR_NO_DEVICE
+Determine if a driver is active on a interface.
+Returns 0 if no kernel driver
+is active, returns 1 if a kernel driver is active,
+returns LIBUSB_ERROR_NO_DEVICE
 if the device has been disconnected and returns a LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_get_driver "libusb_device_handle *devh" "int interface" "char *name" "int namelen"
 or
@@ -284,9 +235,7 @@
 The buffer pointed to by
 .Fa name
 is only zero terminated on success.
-.
 .Pp
-.
 .Ft int
 .Fn libusb_detach_kernel_driver "libusb_device_handle *devh" "int interface"
 or
@@ -295,69 +244,66 @@
 Detach a kernel driver from an interface.
 This is needed to claim an interface required by a kernel driver.
 Returns 0 on success, LIBUSB_ERROR_NOT_FOUND if no kernel driver was active,
-LIBUSB_ERROR_INVALID_PARAM if the interface does not exist, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and a LIBUSB_ERROR code on failure. This function is non-portable.
-.
+LIBUSB_ERROR_INVALID_PARAM if the interface does not exist,
+LIBUSB_ERROR_NO_DEVICE if the device has been disconnected
+and a LIBUSB_ERROR code on failure.
+This function is non-portable.
 .Pp
-.
 .Ft int
 .Fn libusb_attach_kernel_driver "libusb_device_handle *devh" "int interface"
-Re-attach an interface kernel driver previously detached. Returns 0 on success, 
-LIBUSB_ERROR_INVALID_PARAM if the interface does not exist, LIBUSB_ERROR_NO_DEVICE
-if the device has been disconnect, LIBUSB_ERROR_BUSY if the driver cannot be 
-attached because the interface is claimed by a program or driver and a 
+Re-attach an interface kernel driver previously detached.
+Returns 0 on success,
+LIBUSB_ERROR_INVALID_PARAM if the interface does not exist,
+LIBUSB_ERROR_NO_DEVICE
+if the device has been disconnect, LIBUSB_ERROR_BUSY if the driver cannot be
+attached because the interface is claimed by a program or driver and a
 LIBUSB_ERROR code on failure.
-.
 .Pp
-.
 .Sh USB DESCRIPTORS
-.
 .Pp
-.
 .Ft int
 .Fn libusb_get_device_descriptor "libusb_device *dev" "libusb_device_descriptor *desc"
 Get the USB device descriptor for the device
 .Fa dev.
-This is a non-blocking function. Returns 0 on success and a LIBUSB_ERROR code on 
+This is a non-blocking function.
+Returns 0 on success and a LIBUSB_ERROR code on
 failure.
-.
 .Pp
-.Ft int 
+.Ft int
 .Fn libsub_get_active_config_descriptor "libusb_device *dev" "struct libusb_config_descriptor **config"
-Get the USB configuration descriptor for the active configuration. Returns 0 on 
-success, returns LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state 
+Get the USB configuration descriptor for the active configuration.
+Returns 0 on
+success, returns LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state
 and returns another LIBUSB_ERROR code on error.
-.
 .Pp
-.Ft int 
+.Ft int
 .Fn libusb_get_config_descriptor "libusb_device *dev" "uint8_t config_index" "libusb_config_descriptor **config"
-Get USB configuration descriptor based on its index 
+Get USB configuration descriptor based on its index
 .Fa idx.
-Returns 0 on success, LIBUSB_ERROR_NOT_FOUND if the configuration does not exist 
+Returns 0 on success, LIBUSB_ERROR_NOT_FOUND if the configuration does not exist
 and returns another LIBUSB_ERROR code on error.
-.
 .Pp
 .Ft int
 .Fn libusb_get_config_descriptor_by_value "libusb_device *dev" "uint8 bConfigurationValue" "libusb_config_descriptor **config"
-Get a USB configuration descriptor with a specific bConfigurationValue. This is 
-a non-blocking function which does not send request through the device. Returns 0 
-on success, LIBUSB_ERROR_NOT_FOUND if the configuration does not exist and another 
+Get a USB configuration descriptor with a specific bConfigurationValue.
+This is
+a non-blocking function which does not send request through the device.
+Returns 0
+on success, LIBUSB_ERROR_NOT_FOUND if the configuration
+does not exist and another
 LIBUSB_ERROR code on failure.
-.
 .Pp
 .Ft void
 .Fn libusb_free_config_descriptor "libusb_config_descriptor *config"
 Free a configuration descriptor.
-.
 .Pp
 .Ft int
 .Fn libusb_get_string_descriptor_ascii "libusb_device_handle *devh" "uint8_t desc_idx" "unsigned char *data" "int length"
 Retrieve a string descriptor in C style ascii.
-Returns a positive number of bytes in the resulting ASCII string on success and a LIBUSB_ERROR code on failure.
-.
+Returns a positive number of bytes in the resulting ASCII string
+on success and a LIBUSB_ERROR code on failure.
 .Pp
-.
 .Sh USB ASYNCHRONOUS I/O
-.
 .Pp
 .Ft struct libusb_transfer *
 .Fn libusb_alloc_transfer "int iso_packets"
@@ -365,28 +311,24 @@
 .Fa iso_packets
 numbers of isochronous packet descriptors.
 Returns NULL on error.
-.
 .Pp
 .Ft void
 .Fn libusb_free_transfer "struct libusb_transfer *tr"
 Free a transfer.
-.
 .Pp
 .Ft int
 .Fn libusb_submit_transfer "struct libusb_transfer *tr"
 This function will submit a transfer and returns immediately.
-Returns 0 on success, LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and 
+Returns 0 on success, LIBUSB_ERROR_NO_DEVICE if
+the device has been disconnected and
 LIBUSB_ERROR code on other failure.
-.
 .Pp
 .Ft int
 .Fn libusb_cancel_transfer "struct libusb_transfer *tr"
 This function asynchronously cancel a transfer.
 Returns 0 on success and LIBUSB_ERROR code on failure.
-.
 .Pp
 .Sh USB SYNCHRONOUS I/O
-.
 .Pp
 .Ft int
 .Fn libusb_control_transfer "libusb_device_handle *devh" "uint8_t bmRequestType" "uint8_t bRequest" "uint16_t wValue" "uint16_t wIndex" "unsigned char *data" "uint16_t wLength" "unsigned int timeout"
@@ -400,125 +342,121 @@
 control request was not supported, LIBUSB_ERROR_NO_DEVICE if the
 device has been disconnected or another LIBUSB_ERROR code on other failures.
 The libusb error codes are always negative.
-.
 .Pp
 .Ft int
 .Fn libusb_bulk_transfer "struct libusb_device_handle *devh" "unsigned char endpoint" "unsigned char *data" "int length" "int *transferred" "unsigned int timeout"
 Perform an USB bulk transfer.
 A timeout value of zero means no timeout.
 The timeout value is given in milliseconds.
-Returns 0 on success, LIBUSB_ERROR_TIMEOUT 
-if the transfer timeout, LIBUSB_ERROR_PIPE if the control request was not 
-supported, LIBUSB_ERROR_OVERFLOW if the device offered more data, 
-LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and 
+Returns 0 on success, LIBUSB_ERROR_TIMEOUT
+if the transfer timeout, LIBUSB_ERROR_PIPE if the control request was not
+supported, LIBUSB_ERROR_OVERFLOW if the device offered more data,
+LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and
 LIBUSB_ERROR code on other failure.
-.
 .Pp
 .Ft int
 .Fn libusb_interrupt_transfer "struct libusb_device_handle *devh" "unsigned char endpoint" "unsigned char *data" "int length" "int *transferred" "unsigned int timeout"
 Perform an USB Interrupt transfer.
 A timeout value of zero means no timeout.
 The timeout value is given in milliseconds.
-Returns 0 on success, LIBUSB_ERROR_TIMEOUT 
-if the transfer timeout, LIBUSB_ERROR_PIPE if the control request was not 
-supported, LIBUSB_ERROR_OVERFLOW if the device offered more data, 
-LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and 
+Returns 0 on success, LIBUSB_ERROR_TIMEOUT
+if the transfer timeout, LIBUSB_ERROR_PIPE if the control request was not
+supported, LIBUSB_ERROR_OVERFLOW if the device offered more data,
+LIBUSB_ERROR_NO_DEVICE if the device has been disconnected and
 LIBUSB_ERROR code on other failure.
-.
 .Pp
 .Sh USB EVENTS
-.
 .Pp
 .Ft int
 .Fn libusb_try_lock_events "libusb_context *ctx"
 Try to acquire the event handling lock.
 Returns 0 if the lock was obtained and 1 if not.
-.
 .Pp
 .Ft void
 .Fn libusb_lock_events "libusb_context *ctx"
-Acquire the event handling lock. This function is blocking.
-.
+Acquire the event handling lock.
+This function is blocking.
 .Pp
 .Ft void
 .Fn libusb_unlock_events "libusb_context *ctx"
-Release the event handling lock. This will wake up any thread blocked
+Release the event handling lock.
+This will wake up any thread blocked
 on libusb_wait_for_event().
-.
 .Pp
 .Ft int
 .Fn libusb_event_handling_ok "libusb_context *ctx"
-Determine if it still OK for this thread to be doing event handling. Returns 1
-if event handling can start or continue. Returns 0 if this thread must give up
+Determine if it still OK for this thread to be doing event handling.
+Returns 1
+if event handling can start or continue.
+Returns 0 if this thread must give up
 the events lock.
-.
 .Pp
 .Ft int
 .Fn libusb_event_handler_active "libusb_context *ctx"
-Determine if an active thread is handling events. Returns 1 if yes and 0 if there
+Determine if an active thread is handling events.
+Returns 1 if yes and 0 if there
 are no threads currently handling events.
-.
 .Pp
 .Ft void
 .Fn libusb_lock_event_waiters "libusb_context *ctx"
-Acquire the event_waiters lock. This lock is designed to be obtained under the
+Acquire the event_waiters lock.
+This lock is designed to be obtained under the
 situation where you want to be aware when events are completed, but some other
 thread is event handling so calling libusb_handle_events() is not allowed.
-.
 .Pp
 .Ft void
 .Fn libusb_unlock_event_waiters "libusb_context *ctx"
 Release the event_waiters lock.
-.
 .Pp
-.Ft int 
+.Ft int
 .Fn libusb_wait_for_event "libusb_context *ctx" "struct timeval *tv"
-Wait for another thread to signal completion of an event. Must be called
-with the event waiters lock held, see libusb_lock_event_waiters(). This will
+Wait for another thread to signal completion of an event.
+Must be called
+with the event waiters lock held, see libusb_lock_event_waiters().
+This will
 block until the timeout expires or a transfer completes or a thread releases
-the event handling lock through libusb_unlock_events(). Returns 0 after a 
+the event handling lock through libusb_unlock_events().
+Returns 0 after a
 transfer completes or another thread stops event handling, returns 1 if the
 timeout expired.
-.
 .Pp
 .Ft int
 .Fn libusb_handle_events_timeout "libusb_context *ctx" "struct timeval *tv"
-Handle any pending events by checking if timeouts have expired and by 
-checking the set of file descriptors for activity. Returns 0 on success, or a
+Handle any pending events by checking if timeouts have expired and by
+checking the set of file descriptors for activity.
+Returns 0 on success, or a
 LIBUSB_ERROR code on failure.
-.
 .Pp
 .Ft int
 .Fn libusb_handle_events "libusb_context *ctx"
-Handle any pending events in blocking mode with a sensible timeout. Returns 0
+Handle any pending events in blocking mode with a sensible timeout.
+Returns 0
 on success, returns a LIBUSB_ERROR code on failure.
-.
 .Pp
 .Ft int
 .Fn libusb_handle_events_locked "libusb_context *ctx" "struct timeval *tv"
 Handle any pending events by polling file desciptors, without checking if
-another threads are already doing so. Must be called with the event lock held.
-.
+another threads are already doing so.
+Must be called with the event lock held.
 .Pp
 .Ft int
 .Fn libusb_get_next_timeout "libusb_context *ctx" "struct timeval *tv"
-Determine the next internal timeout that libusb needs to handle. Returns 0
+Determine the next internal timeout that libusb needs to handle.
+Returns 0
 if there are no pending timeouts, 1 if a timeout was returned, or LIBUSB_ERROR
 code on failure.
-.
 .Pp
 .Ft void
 .Fn libusb_set_pollfd_notifiers "libusb_context *ctx" "libusb_pollfd_added_cb added_cb" "libusb_pollfd_removed_cb remove_cb" "void *user_data"
 Register notification functions for file descriptor additions/removals.
 These functions will be invoked for every new or removed file descriptor
 that libusb uses as an event source.
-.
 .Pp
 .Ft const struct libusb_pollfd **
 .Fn libusb_get_pollfds "libusb_context *ctx"
-Retrive a list of file descriptors that should be polled by your main loop as 
-libusb event sources. Returns a NULL-terminated list on success or NULL on failure.
-.
+Retrive a list of file descriptors that should be polled by your main loop as
+libusb event sources.
+Returns a NULL-terminated list on success or NULL on failure.
 .Sh LIBUSB VERSION 0.1 COMPATIBILITY
 .Pp
 The library is also compliant with LibUSB version 0.1.12.
@@ -555,16 +493,13 @@
 .Fn usb_check_connected
 .Fn usb_get_driver_np
 .Fn usb_detach_kernel_driver_np
-.
 .Sh SEE ALSO
 .Xr libusb20 3 ,
 .Xr usb 4 ,
 .Xr usbconfig 8
 .Pp
 .Pa http://libusb.sourceforge.net/
-.
 .Sh HISTORY
-.
 .Nm
 support first appeared in
 .Fx 8.0 .