fix: don't exit with fping host is unreachable

As ping can return unknown exit codes for unknown cases,
just never bail out to avoid taking bad decisions,
as we retry each second maximum, there's no DoS risk

bin/plugin/open/alive

@@ -51,19 +51,18 @@ if (not $host) {
 
 osh_info "Waiting for $host to be alive...";
 my $startedat = Time::HiRes::gettimeofday();
-my $isFping   = 1;
+my $firstLoop = 1;
 my @command   = qw{ fping -- };
 push @command, $host;
 while (1) {
     $fnret = OVH::Bastion::execute(cmd => \@command, noisy_stdout => 1, noisy_stderr => 1);
     if ($fnret->err eq 'ERR_EXEC_FAILED') {
-        if ($isFping) {
-
+        if ($firstLoop) {
             # maybe fping doesn't work, fallback to ping
             @command = qw{ ping -c 1 -w 1 -- };
             push @command, $host;
-            $isFping = 0;
-            next;
+            $firstLoop = 0;
+            next;    # restart the loop to exec ping
         }
         osh_exit $fnret;    # we tried both ping and fping :(
     }
@@ -73,9 +72,6 @@ while (1) {
         osh_info "Alive after waiting for $delay seconds, exiting!";
         osh_ok {waited_for => $delay + 0};
     }
-    elsif (($isFping && $fnret->value->{'sysret'} >= 3) || ($fnret->value->{'sysret'} > 0)) {
-        osh_exit 'ERR_INTERNAL', "Fatal error returned by (f)ping, aborting";
-    }
     sleep 1;
 }
 

tests/functional/launch_tests_on_instance.sh

@@ -654,7 +654,10 @@ sshclientconfigchg()
 
 dump_vars_and_funcs()
 {
-    set | grep -v -E '^(testno|section|code_warn_exclude|COPROC_PID|LINES|COLUMNS|PIPESTATUS|_|BASH_LINENO|basename|case|json|name|tmpscript|grepit|got|isbad|nbfailedgrep)='
+    set | grep -v -E '^('\
+'testno|section|code_warn_exclude|COPROC_PID|LINES|COLUMNS|PIPESTATUS|_|'\
+'BASH_LINENO|basename|case|json|name|tmpscript|grepit|got|isbad|'\
+'nbfailedgrep|shouldbe)='
 }
 
 runtests()

tests/functional/tests.d/360-plugins.sh

@@ -93,6 +93,9 @@ EOS
 
     success alive_withoutHost $a0 --osh alive 127.0.0.1
     json .command alive .error_code OK .value.waited_for 0
+
+    run alive_unreachable $a0f --osh alive 192.0.2.0
+    retvalshouldbe 124
 }
 
 testsuite_plugins