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Detect goofy sudo -n output under OSX

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Summary: See rP2fedb6f941d8. We might need a more general version of this since we do some `sudo` stuff elsewhere, but at least on my machine `sudo -n` exits with code 0 when the target user exists but needs a password.

Test Plan:
  - Tried to run daemons as root, with no automatic sudo to root. Got a bad result before (phd believed it had executed the daemons) and a good result afterward (phd recognized that sudo failed).
  - Tried to run daemons from root, as a non-root user. Got a good result in both cases.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: fabe, epriestley

Differential Revision: https://secure.phabricator.com/D11041
This commit is contained in:
epriestley 2014-12-23 14:45:07 -08:00
parent f35a38b086
commit b3394c53d8
1 changed files with 17 additions and 2 deletions
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19
src/applications/daemon/management/PhabricatorDaemonManagementWorkflow.php
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@ -221,7 +221,7 @@ abstract class PhabricatorDaemonManagementWorkflow
$command,
$daemon_script_dir,
$this->runDaemonsAsUser);
} catch (CommandException $e) {
} catch (Exception $e) {
// Retry without sudo
$console->writeOut(pht(
"sudo command failed. Starting daemon as current user\n"));
@ -237,6 +237,7 @@ abstract class PhabricatorDaemonManagementWorkflow
$daemon_script_dir,
$run_as_user = null) {
$is_sudo = false;
if ($run_as_user) {
// If anything else besides sudo should be
// supported then insert it here (runuser, su, ...)
@ -244,11 +245,25 @@ abstract class PhabricatorDaemonManagementWorkflow
'sudo -En -u %s -- %C',
$run_as_user,
$command);
$is_sudo = true;
}
$future = new ExecFuture('exec %C', $command);
// Play games to keep 'ps' looking reasonable.
$future->setCWD($daemon_script_dir);
$future->resolvex();
list($stdout, $stderr) = $future->resolvex();
if ($is_sudo) {
// On OSX, `sudo -n` exits 0 when the user does not have permission to
// switch accounts without a password. This is not consistent with
// sudo on Linux, and seems buggy/broken. Check for this by string
// matching the output.
if (preg_match('/sudo: a password is required/', $stderr)) {
throw new Exception(
pht(
'sudo exited with a zero exit code, but emitted output '.
'consistent with failure under OSX.'));
}
}
}
public static function ignoreSignal($signo) {