mirror of
https://github.com/go-sylixos/elvish.git
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35 lines
618 B
Go
35 lines
618 B
Go
package sys
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import (
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"syscall"
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)
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func Fcntl(fd int, cmd int, arg int) (val int, err error) {
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r, _, e := syscall.Syscall(syscall.SYS_FCNTL, uintptr(fd), uintptr(cmd),
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uintptr(arg))
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val = int(r)
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if e != 0 {
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err = e
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}
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return
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}
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func GetNonblock(fd int) (bool, error) {
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r, err := Fcntl(fd, syscall.F_GETFL, 0)
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return r&syscall.O_NONBLOCK != 0, err
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}
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func SetNonblock(fd int, nonblock bool) error {
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r, err := Fcntl(fd, syscall.F_GETFL, 0)
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if err != nil {
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return err
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}
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if nonblock {
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r |= syscall.O_NONBLOCK
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} else {
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r &^= syscall.O_NONBLOCK
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}
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_, err = Fcntl(fd, syscall.F_SETFL, r)
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return err
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}
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