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  47 .Dd January 20, 2019
  48 .Dt CFSETISPEED 3C
  49 .Os
  50 .Sh NAME
  51 .Nm cfsetispeed ,
  52 .Nm cfsetospeed
  53 .Nd set input and output baud rate
  54 .Sh SYNOPSIS
  55 .In termios.h
  56 .Ft int
  57 .Fo cfsetispeed
  58 .Fa "struct termios *termios_p"
  59 .Fa "speed_t speed"
  60 .Fc
  61 .Ft int
  62 .Fo cfsetospeed
  63 .Fa "struct termios *termios_p"
  64 .Fa "speed_t speed"
  65 .Fc
  66 .Sh DESCRIPTION
  67 The
  68 .Fn cfsetispeed
  69 function sets the input baud rate stored in the
  70 structure pointed to by
  71 .Fa termios_p
  72 to
  73 .Fa speed .
  74 .Pp
  75 The
  76 .Fn cfsetospeed
  77 function sets the output baud rate stored in the
  78 structure pointed to by
  79 .Fa termios_p
  80 to
  81 .Fa speed .
  82 .Pp
  83 There is no effect on the baud rates set in the hardware until a subsequent
  84 successful call to
  85 .Xr tcsetattr 3C
  86 on the same
  87 .Vt termios
  88 structure.
  89 .Sh RETURN VALUES
  90 Upon successful completion,
  91 .Fn cfsetispeed
  92 and
  93 .Fn cfsetospeed
  94 return
  95 .Sy 0 .
  96 Otherwise
  97 .Sy \(mi1
  98 is returned, and
  99 .Va errno
 100 may be set to indicate the error.
 101 .Sh ERRORS
 102 The
 103 .Fn cfsetispeed
 104 and
 105 .Fn cfsetospeed
 106 functions may fail if:
 107 .Bl -tag -width EINVAL
 108 .It Er EINVAL
 109 The
 110 .Fa speed
 111 value is not a valid baud rate.
 112 .It Er EINVAL
 113 The value of
 114 .Fa speed
 115 is outside the range of possible speed values as specified in
 116 .In termios.h .
 117 .El
 118 .Sh INTERFACE STABILITY
 119 Standard
 120 .Sh MT-LEVEL
 121 MT-Safe
 122 .Pp
 123 Async-Signal-Safe
 124 .Sh SEE ALSO
 125 .Xr cfgetispeed 3C ,
 126 .Xr tcsetattr 3C ,
 127 .Xr attributes 5 ,
 128 .Xr standards 5 ,
 129 .Xr termio 7I