check_by_ssh: handle errrors of ssh (1) directly

1 files changed, 17 insertions, 0 deletions

diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index ad385fbd..8036ffa4 100644
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
@@ -103,7 +103,24 @@ int main(int argc, char **argv) {
                 sc_ssh_execution = mp_set_subcheck_state(sc_ssh_execution, STATE_UNKNOWN);
                 mp_add_subcheck_to_check(&overall, sc_ssh_execution);
                 mp_exit(overall);
+        } else if (child_result.cmd_error_code != 0) {
+                xasprintf(&sc_ssh_execution.output, "SSH connection failed: ");
+
+                if (child_result.stderr.lines > 0) {
+                        for (size_t i = 0; i < child_result.stderr.lines; i++) {
+                                xasprintf(&sc_ssh_execution.output, "%s\n%s", sc_ssh_execution.output,
+                                                  child_result.stderr.line[i]);
+                        }
+                } else {
+                        xasprintf(&sc_ssh_execution.output, "%s %s", sc_ssh_execution.output,
+                                          "no output on stderr");
+                }
+
+                sc_ssh_execution = mp_set_subcheck_state(sc_ssh_execution, STATE_UNKNOWN);
+                mp_add_subcheck_to_check(&overall, sc_ssh_execution);
+                mp_exit(overall);
         }
+
         xasprintf(&sc_ssh_execution.output, "SSH connection succeeded");
         sc_ssh_execution = mp_set_subcheck_state(sc_ssh_execution, STATE_OK);
         mp_add_subcheck_to_check(&overall, sc_ssh_execution);