Merge pull request #1743 from rubenk/apcups-coverity

[collectd.git] / src / processes.c

diff --git a/src/processes.c b/src/processes.c
index d759cb7..5bacd5b 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
@@ -538,6 +544,12 @@ 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 +570,15 @@ 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)
@@ -1038,13 +1059,11 @@ static int ps_read_process (long pid, procstat_t *ps, char *state)
         * strchr(3) and strrchr(3) to avoid pointer arithmetic which would
         * otherwise be required to determine name_len. */
        name_start_pos = 0;
-       while ((buffer[name_start_pos] != '(')
-                       && (name_start_pos < buffer_len))
+       while (name_start_pos < buffer_len && buffer[name_start_pos] != '(')
                name_start_pos++;
 
        name_end_pos = buffer_len;
-       while ((buffer[name_end_pos] != ')')
-                       && (name_end_pos > 0))
+       while (name_end_pos > 0 && buffer[name_end_pos] != ')')
                name_end_pos--;
 
        /* Either '(' or ')' is not found or they are in the wrong order.
@@ -1092,7 +1111,7 @@ static int ps_read_process (long pid, procstat_t *ps, char *state)
                        ps->vmem_code = -1;
                        DEBUG("ps_read_process: did not get vmem data for pid %li", pid);
                }
-               if (ps->num_lwp <= 0)
+               if (ps->num_lwp == 0)
                        ps->num_lwp = 1;
                ps->num_proc = 1;
        }
@@ -1216,7 +1235,7 @@ static char *ps_get_cmdline (long pid, char *name, char *buf, size_t buf_len)
                buf_ptr += status;
                len     -= status;
 
-               if (len <= 0)
+               if (len == 0)
                        break;
        }
 
@@ -1364,6 +1383,10 @@ static int ps_read_process(long pid, procstat_t *ps, char *state)
                ps->num_proc = 0;
                ps->num_lwp = 0;
                *state = (char) 'Z';
+
+               sfree(myStatus);
+               sfree(myInfo);
+               sfree(myUsage);
                return (0);
        } else {
                ps->num_proc = 1;