inputor

Evdev remapping utility in lua
git clone https://git.neptards.moe/u3shit/inputor.git
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ioctl_helper.lua (1182B)

      1 local base = string.match(..., "(.-)[^%.]+%.[^%.]+$")
      2 local ffi = require("ffi")
      3 local e_assert = require(base.."helper.errno").assert
      4 
      5 local ffi_errno, ffi_string = ffi.errno, ffi.string
      6 
      7 local module = {}
      8 
      9 function module.check_0(func)
     10   return function(self, ...)
     11     ffi_errno(0)
     12     e_assert("ioctl", func(self.fd, ...) == 0, 2)
     13   end
     14 end
     15 
     16 function module.check_0_argwrap(func, wrap)
     17   return function(self, ...)
     18     local arg = wrap(...)
     19     ffi_errno(0)
     20     e_assert("ioctl", func(self.fd, arg.raw) == 0, 2)
     21   end
     22 end
     23 
     24 function module.check_1(func)
     25   return function(self, ...)
     26     ffi_errno(0)
     27     local res, x0 = func(self.fd, ...)
     28     e_assert("ioctl", res == 0, 2)
     29     return x0
     30   end
     31 end
     32 
     33 function module.check_1_reswrap(func, wrap)
     34   return function(self, ...)
     35     ffi_errno(0)
     36     local res, x0 = func(self.fd, ...)
     37     e_assert("ioctl", res == 0, 2)
     38     return wrap(x0)
     39   end
     40 end
     41 
     42 local char_ary = ffi.typeof("char[?]")
     43 function module.string_prop(ioctl)
     44   return function(self, len)
     45     len = len or 4096
     46     local buf = char_ary(len)
     47     local res = ioctl(self.fd, buf)
     48     e_assert("ioctl", res >= 0, 2)
     49     return ffi_string(buf, res-1)
     50   end
     51 end
     52 
     53 
     54 return module