/share/man/man9/device_find_child.9

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  31. .Dd February 8, 2005
    32. 

  32. .Dt DEVICE_FIND_CHILD 9
    33. 

  33. .Os
    34. 

  34. .Sh NAME
    35. 

  35. .Nm device_find_child
    36. 

  36. .Nd search for a child of a device
    37. 

  37. .Sh SYNOPSIS
    38. 

  38. .In sys/param.h
    39. 

  39. .In sys/bus.h
    40. 

  40. .Ft device_t
    41. 

  41. .Fn device_find_child "device_t dev" "const char *classname" "int unit"
    42. 

  42. .Sh DESCRIPTION
    43. 

  43. This function looks for a specific child of
    44. 

  44. .Dv dev
    45. 

  45. with the given
    46. 

  46. .Fa classname
    47. 

  47. and
    48. 

  48. .Fa unit .
    49. 

  49. If
    50. 

  50. .Fa unit
    51. 

  51. is \-1, it returns the first child of
    52. 

  52. .Fa dev
    53. 

  53. with a matching
    54. 

  54. .Fa classname
    55. 

  55. (that is, the one with the lowest unit).
    56. 

  56. .Sh RETURN VALUES
    57. 

  57. If it exists, the child device is returned, otherwise NULL.
    58. 

  58. .Sh SEE ALSO
    59. 

  59. .Xr device_add_child 9
    60. 

  60. .Sh AUTHORS
    61. 

  61. This manual page was written by
    62. 

  62. .An Doug Rabson .
    63.