processes plugin: ps_read_tasks will fail under Linux 2.4.

Take this into account and don't report all processes without tasks as zombies.

diff --git a/src/processes.c b/src/processes.c
index 68984458058df5e69769662b7086833867d22c00..ccf1571f8ea6211e32defc2418a43212dff7826d 100644 (file)
--- a/src/processes.c
+++ b/src/processes.c
@@ -708,17 +708,21 @@ int ps_read_process (int pid, procstat_t *ps, char *state)
 
        ppid = atoi (fields[3]);
 
-       if ((tasks = ps_read_tasks (pid)) == NULL)
-       {
-               /* This happends for zombied, e.g. */
-               DBG ("ps_read_tasks (%i) failed.", pid);
-               *state = 'Z';
-               ps->num_lwp  = 0;
-               ps->num_proc = 0;
-       }
+       *state = fields[2][0];
+ 
+       if (*state == 'Z')
+       {
+               ps->num_lwp  = 0;
+               ps->num_proc = 0;
+       }
+       else if ((tasks = ps_read_tasks (pid)) == NULL)
+       {
+               /* Kernel 2.4 or so */
+               ps->num_lwp  = 1;
+               ps->num_proc = 1;
+       }
        else
        {
-               *state = '\0';
                ps->num_lwp  = 0;
                ps->num_proc = 1;
                for (i = 0; tasks[i] != 0; i++)
@@ -728,10 +732,10 @@ int ps_read_process (int pid, procstat_t *ps, char *state)
                tasks = NULL;
        }
 
-       /* Leave the rest at zero if this is only an LWP */
+       /* Leave the rest at zero if this is only a zombi */
        if (ps->num_proc == 0)
        {
-               DBG ("This is only an LWP: pid = %i; name = %s;",
+               DBG ("This is only a zombi: pid = %i; name = %s;",
                                pid, ps->name);
                return (0);
        }
@@ -751,8 +755,6 @@ int ps_read_process (int pid, procstat_t *ps, char *state)
        ps->cpu_system_counter = (unsigned long) cpu_system_counter;
        ps->vmem_rss = (unsigned long) vmem_rss;
 
-       *state = fields[2][0];
-
        /* success */
        return (0);
 } /* int ps_read_process (...) */