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cherry-pick: 3157 excessive ptrs

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Merge in DNS/adguard-home from 3157-excessive-ptrs to master

Updates #3157.

Squashed commit of the following:

commit 6803988240dca2f147bb80a5b3f78d7749d2fa14
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:50:01 2022 +0300

    aghnet: and again

commit 1a7f4d1dbc8fd4d3ae620349917526a75fa71b47
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:49:20 2022 +0300

    aghnet: docs again

commit d88da1fc7135f3cd03aff10b02d9957c8ffdfd30
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:47:36 2022 +0300

    aghnet: imp docs

commit c45dbc7800e882c6c4110aab640c32b03046f89a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 14:41:19 2022 +0300

    aghnet: keep alphabetical order

commit b61781785d096ef43f60fb4f1905a4ed3cdf7c68
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 19 13:50:56 2022 +0300

    aghnet: imp code quality

commit 578dbd71ed2f2089c69343d7d4bf8bbc29150ace
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Apr 12 17:02:38 2022 +0300

    aghnet: imp arp container
This commit is contained in:
Eugene Burkov
2022-04-19 15:01:49 +03:00
committed by Ainar Garipov
parent 723279121a
commit c4a13b92d2
39 changed files with 2111 additions and 510 deletions
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29
internal/aghos/os.go
View File

@@ -52,24 +52,27 @@ func HaveAdminRights() (bool, error) {
return haveAdminRights()
}
// MaxCmdOutputSize is the maximum length of performed shell command output.
const MaxCmdOutputSize = 2 * 1024
// MaxCmdOutputSize is the maximum length of performed shell command output in
// bytes.
const MaxCmdOutputSize = 64 * 1024
// RunCommand runs shell command.
func RunCommand(command string, arguments ...string) (int, string, error) {
func RunCommand(command string, arguments ...string) (code int, output []byte, err error) {
cmd := exec.Command(command, arguments...)
out, err := cmd.Output()
if len(out) > MaxCmdOutputSize {
out = out[:MaxCmdOutputSize]
}
if errors.As(err, new(*exec.ExitError)) {
return cmd.ProcessState.ExitCode(), string(out), nil
} else if err != nil {
return 1, "", fmt.Errorf("exec.Command(%s) failed: %w: %s", command, err, string(out))
if err != nil {
if eerr := new(exec.ExitError); errors.As(err, &eerr) {
return eerr.ExitCode(), eerr.Stderr, nil
}
return 1, nil, fmt.Errorf("command %q failed: %w: %s", command, err, out)
}
return cmd.ProcessState.ExitCode(), string(out), nil
return cmd.ProcessState.ExitCode(), out, nil
}
// PIDByCommand searches for process named command and returns its PID ignoring
@@ -172,3 +175,13 @@ func RootDirFS() (fsys fs.FS) {
// behavior is undocumented but it currently works.
return os.DirFS("")
}
// NotifyShutdownSignal notifies c on receiving shutdown signals.
func NotifyShutdownSignal(c chan<- os.Signal) {
notifyShutdownSignal(c)
}
// IsShutdownSignal returns true if sig is a shutdown signal.
func IsShutdownSignal(sig os.Signal) (ok bool) {
return isShutdownSignal(sig)
}