AdGuardHome/internal/aghos/os_linux.go

40 lines
907 B
Go

// +build linux
package aghos
import (
"os"
"syscall"
"github.com/AdguardTeam/golibs/log"
"golang.org/x/sys/unix"
)
func canBindPrivilegedPorts() (can bool, err error) {
cnbs, err := unix.PrctlRetInt(unix.PR_CAP_AMBIENT, unix.PR_CAP_AMBIENT_IS_SET, unix.CAP_NET_BIND_SERVICE, 0, 0)
// Don't check the error because it's always nil on Linux.
adm, _ := haveAdminRights()
return cnbs == 1 || adm, err
}
func setRlimit(val uint) {
var rlim syscall.Rlimit
rlim.Max = uint64(val)
rlim.Cur = uint64(val)
err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlim)
if err != nil {
log.Error("Setrlimit() failed: %v", err)
}
}
func haveAdminRights() (bool, error) {
// The error is nil because the platform-independent function signature
// requires returning an error.
return os.Getuid() == 0, nil
}
func sendProcessSignal(pid int, sig syscall.Signal) error {
return syscall.Kill(pid, sig)
}