1USB_STRING(9)                    USB Core APIs                   USB_STRING(9)
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NAME

6       usb_string - returns UTF-8 version of a string descriptor
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SYNOPSIS

9       int usb_string(struct usb_device * dev, int index, char * buf,
10                      size_t size);
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ARGUMENTS

13       dev
14           the device whose string descriptor is being retrieved
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16       index
17           the number of the descriptor
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19       buf
20           where to put the string
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22       size
23           how big is “buf”?
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CONTEXT

26       !in_interrupt ()
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DESCRIPTION

29       This converts the UTF-16LE encoded strings returned by devices, from
30       usb_get_string_descriptor, to null-terminated UTF-8 encoded ones that
31       are more usable in most kernel contexts. Note that this function
32       chooses strings in the first language supported by the device.
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34       This call is synchronous, and may not be used in an interrupt context.
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36       Returns length of the string (>= 0) or usb_control_msg status (< 0).
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39Kernel Hackers Manual 2.6.         June 2019                     USB_STRING(9)
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