Merge pull request #1816 from octo/grpc-free-iter

[collectd.git] / src / processes.c

diff --git a/src/processes.c b/src/processes.c
index 03b44b5..f029a6c 100644 (file)
--- a/src/processes.c
+++ b/src/processes.c
@@ -128,7 +128,13 @@
 #  undef SAVE_FOB_64
 #endif
 
+# include <sys/user.h>
 # include <dirent.h>
+
+#ifndef MAXCOMLEN
+#  define MAXCOMLEN 16
+#endif
+
 /* #endif KERNEL_SOLARIS */
 
 #else
@@ -360,29 +366,25 @@ static int ps_list_match (const char *name, const char *cmdline, procstat_t *ps)
        return (0);
 } /* int ps_list_match */
 
-static void ps_update_counter (
-        _Bool init,
-        derive_t *group_counter,
-        derive_t *curr_counter, unsigned long *curr_value,
-        derive_t new_counter, unsigned long new_value) {
-    if (init)
-    {
-        *curr_value = new_value;
-        *curr_counter += new_value;
-        *group_counter += new_value;
-        return;
-    }
-
-    if (new_counter < *curr_counter)
-    {
-        *curr_value = new_counter + (ULONG_MAX - *curr_counter);
-    }
-    else
-    {
-        *curr_value = new_counter - *curr_counter;
-    }
-    *curr_counter = new_counter;
-    *group_counter += *curr_value;
+static void ps_update_counter (_Bool init, derive_t *group_counter,
+                               derive_t *curr_counter, unsigned long *curr_value,
+                               derive_t new_counter, unsigned long new_value)
+{
+       if (init)
+       {
+               *curr_value = new_value;
+               *curr_counter += new_value;
+               *group_counter += new_value;
+               return;
+       }
+
+       if (new_counter < *curr_counter)
+               *curr_value = new_counter + (ULONG_MAX - *curr_counter);
+       else
+               *curr_value = new_counter - *curr_counter;
+
+       *curr_counter = new_counter;
+       *group_counter += *curr_value;
 }
 
 /* add process entry to 'instances' of process 'name' (or refresh it) */
@@ -396,7 +398,7 @@ static void ps_list_add (const char *name, const char *cmdline, procstat_entry_t
 
        for (ps = list_head_g; ps != NULL; ps = ps->next)
        {
-        _Bool want_init;
+               _Bool want_init;
 
                if ((ps_list_match (name, cmdline, ps)) == 0)
                        continue;
@@ -538,6 +540,12 @@ static int ps_config (oconfig_item_t *ci)
 {
        int i;
 
+#if KERNEL_LINUX
+       const size_t max_procname_len = 15;
+#elif KERNEL_SOLARIS || KERNEL_FREEBSD
+       const size_t max_procname_len = MAXCOMLEN -1;
+#endif
+
        for (i = 0; i < ci->children_num; ++i) {
                oconfig_item_t *c = ci->children + i;
 
@@ -558,6 +566,15 @@ static int ps_config (oconfig_item_t *ci)
                                                c->children_num, c->values[0].value.string);
                        }
 
+#if KERNEL_LINUX || KERNEL_SOLARIS || KERNEL_FREEBSD
+                       if (strlen (c->values[0].value.string) > max_procname_len) {
+                               WARNING ("processes plugin: this platform has a %zu character limit "
+                                               "to process names. The `Process \"%s\"' option will "
+                                               "not work as expected.",
+                                               max_procname_len, c->values[0].value.string);
+                       }
+#endif
+
                        ps_list_register (c->values[0].value.string, NULL);
                }
                else if (strcasecmp (c->key, "ProcessMatch") == 0)
@@ -861,8 +878,8 @@ static procstat_t *ps_read_tasks_status (long pid, procstat_t *ps)
                if (fclose (fh))
                {
                        char errbuf[1024];
-                               WARNING ("processes: fclose: %s",
-                                       sstrerror (errno, errbuf, sizeof (errbuf)));
+                       WARNING ("processes: fclose: %s",
+                               sstrerror (errno, errbuf, sizeof (errbuf)));
                }
        }
        closedir (dh);