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serial_unix.go: Keep writing until complete #192

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serial_unix.go: Keep writing until complete #192

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19 changes: 16 additions & 3 deletions serial_unix.go
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Original file line number Diff line number Diff line change
Expand Up @@ -109,12 +109,25 @@ func (port *unixPort) Read(p []byte) (int, error) {
}
}

func (port *unixPort) Write(p []byte) (n int, err error) {
n, err = unix.Write(port.handle, p)
func (port *unixPort) writeOnce(p []byte) (int, error) {
n, err := unix.Write(port.handle, p)
if n < 0 { // Do not return -1 unix errors
if err == nil {
err = fmt.Errorf("unix.Write() returned n<0,err==nil: n=%d", n)
}
n = 0
}
return
return n, err
}

func (port *unixPort) Write(p []byte) (n int, err error) {
for n < len(p) && err == nil {
var n2 int
n2, err = port.writeOnce(p[n:])
n += n2
}

return n, err
}

func (port *unixPort) Break(t time.Duration) error {
Expand Down