processes plugin: Fix handling of Linux 2.4.

Hi Florian et al

Thanks for the reply, but we detect a minor bug in the previous patch
due to kernel 2.4

The correct patch is attached. The bug is related with kernels 2.4,
where task/ directory do not exists and ps_read_task return -1, which is
catched and raise an error (breaking the ps_read_process function), so a
NaN is dispatched istead of values (number of process:1, number of
threads :1).

Sorry for the inconvenience :(

Regards,
  Andres

Signed-off-by: Florian Forster <octo@leeloo.lan.home.verplant.org>

diff --git a/src/processes.c b/src/processes.c
index fd06b21..4f51518 100644 (file)
--- a/src/processes.c
+++ b/src/processes.c
@@ -704,7 +704,10 @@ int ps_read_process (int pid, procstat_t *ps, char *state)
        else
        {
                if ( (ps->num_lwp = ps_read_tasks (pid)) == -1 )
-                       return (-1);
+               {
+                       /* returns -1 => kernel 2.4 */
+                       ps->num_lwp = 1;
+               }
                ps->num_proc = 1;
        }