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package xsocket
import (
"syscall"
"golang.org/x/sys/unix"
)
// CloexecSocket creates a new socket with the close-on-exec flag set.
//
// If the OS doesn't support the close-on-exec flag, this function will try a workaround.
func CloexecSocket(domain, typ, proto int) (int, error) {
fd, err := socketCloexec(domain, typ, proto)
if err == nil {
return fd, nil
}
if err == unix.EINVAL || err == unix.EPROTONOSUPPORT {
// SOCK_CLOEXEC is not supported, try without it, but avoid racing with fork/exec
syscall.ForkLock.RLock()
defer syscall.ForkLock.RUnlock()
fd, err = unix.Socket(domain, typ, proto)
if err != nil {
return -1, err
}
unix.CloseOnExec(fd)
return fd, nil
}
return fd, err
}
|
