40 lines
909 B
Go
40 lines
909 B
Go
// +build linux
|
|
|
|
package sysutil
|
|
|
|
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)
|
|
}
|