8501a85292
Merge in DNS/adguard-home from 2391-updating-bug to master Updates #2391. Updates #2231. Squashed commit of the following: commit b321884e6ade04375dad3b981c2920500ff6f645 Author: Eugene Burkov <e.burkov@adguard.com> Date: Fri Dec 4 16:54:20 2020 +0300 all: log changes commit 5aa0202a6f6d2abdfc37daee4b0d64f8cee8a62c Author: Eugene Burkov <e.burkov@adguard.com> Date: Fri Dec 4 14:42:10 2020 +0300 sysutil: fix binding capability defining
40 lines
908 B
Go
40 lines
908 B
Go
//+build linux
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package sysutil
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import (
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"os"
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"syscall"
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"github.com/AdguardTeam/golibs/log"
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"golang.org/x/sys/unix"
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)
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func canBindPrivilegedPorts() (can bool, err error) {
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cnbs, err := unix.PrctlRetInt(unix.PR_CAP_AMBIENT, unix.PR_CAP_AMBIENT_IS_SET, unix.CAP_NET_BIND_SERVICE, 0, 0)
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// Don't check the error because it's always nil on Linux.
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adm, _ := haveAdminRights()
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return cnbs == 1 || adm, err
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}
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func setRlimit(val uint) {
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var rlim syscall.Rlimit
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rlim.Max = uint64(val)
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rlim.Cur = uint64(val)
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err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlim)
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if err != nil {
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log.Error("Setrlimit() failed: %v", err)
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}
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}
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func haveAdminRights() (bool, error) {
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// The error is nil because the platform-independent function signature
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// requires returning an error.
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return os.Getuid() == 0, nil
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}
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func sendProcessSignal(pid int, sig syscall.Signal) error {
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return syscall.Kill(pid, sig)
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}
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