Bumped version to 4.7.5; Updated ChangeLog.
[collectd.git] / src / processes.c
1 /**
2  * collectd - src/processes.c
3  * Copyright (C) 2005       Lyonel Vincent
4  * Copyright (C) 2006-2008  Florian octo Forster
5  * Copyright (C) 2008       Oleg King
6  * Copyright (C) 2009       Sebastian Harl
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2 of the License, or (at your
11  * option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
21  *
22  * Authors:
23  *   Lyonel Vincent <lyonel at ezix.org>
24  *   Florian octo Forster <octo at verplant.org>
25  *   Oleg King <king2 at kaluga.ru>
26  *   Sebastian Harl <sh at tokkee.org>
27  **/
28
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
32 #include "configfile.h"
33
34 /* Include header files for the mach system, if they exist.. */
35 #if HAVE_THREAD_INFO
36 #  if HAVE_MACH_MACH_INIT_H
37 #    include <mach/mach_init.h>
38 #  endif
39 #  if HAVE_MACH_HOST_PRIV_H
40 #    include <mach/host_priv.h>
41 #  endif
42 #  if HAVE_MACH_MACH_ERROR_H
43 #    include <mach/mach_error.h>
44 #  endif
45 #  if HAVE_MACH_MACH_HOST_H
46 #    include <mach/mach_host.h>
47 #  endif
48 #  if HAVE_MACH_MACH_PORT_H
49 #    include <mach/mach_port.h>
50 #  endif
51 #  if HAVE_MACH_MACH_TYPES_H
52 #    include <mach/mach_types.h>
53 #  endif
54 #  if HAVE_MACH_MESSAGE_H
55 #    include <mach/message.h>
56 #  endif
57 #  if HAVE_MACH_PROCESSOR_SET_H
58 #    include <mach/processor_set.h>
59 #  endif
60 #  if HAVE_MACH_TASK_H
61 #    include <mach/task.h>
62 #  endif
63 #  if HAVE_MACH_THREAD_ACT_H
64 #    include <mach/thread_act.h>
65 #  endif
66 #  if HAVE_MACH_VM_REGION_H
67 #    include <mach/vm_region.h>
68 #  endif
69 #  if HAVE_MACH_VM_MAP_H
70 #    include <mach/vm_map.h>
71 #  endif
72 #  if HAVE_MACH_VM_PROT_H
73 #    include <mach/vm_prot.h>
74 #  endif
75 #  if HAVE_SYS_SYSCTL_H
76 #    include <sys/sysctl.h>
77 #  endif
78 /* #endif HAVE_THREAD_INFO */
79
80 #elif KERNEL_LINUX
81 #  if HAVE_LINUX_CONFIG_H
82 #    include <linux/config.h>
83 #  endif
84 #  ifndef CONFIG_HZ
85 #    define CONFIG_HZ 100
86 #  endif
87 /* #endif KERNEL_LINUX */
88
89 #elif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD
90 #  include <kvm.h>
91 #  include <sys/param.h>
92 #  include <sys/sysctl.h>
93 #  include <sys/user.h>
94 #  include <sys/proc.h>
95 /* #endif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD */
96
97 #else
98 # error "No applicable input method."
99 #endif
100
101 #if HAVE_REGEX_H
102 # include <regex.h>
103 #endif
104
105 #ifndef ARG_MAX
106 #  define ARG_MAX 4096
107 #endif
108
109 #define BUFSIZE 256
110
111 static const char *config_keys[] =
112 {
113         "Process",
114         "ProcessMatch"
115 };
116 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
117
118 typedef struct procstat_entry_s
119 {
120         unsigned long id;
121         unsigned long age;
122
123         unsigned long num_proc;
124         unsigned long num_lwp;
125         unsigned long vmem_size;
126         unsigned long vmem_rss;
127         unsigned long stack_size;
128
129         unsigned long vmem_minflt;
130         unsigned long vmem_majflt;
131         unsigned long vmem_minflt_counter;
132         unsigned long vmem_majflt_counter;
133
134         unsigned long cpu_user;
135         unsigned long cpu_system;
136         unsigned long cpu_user_counter;
137         unsigned long cpu_system_counter;
138
139         struct procstat_entry_s *next;
140 } procstat_entry_t;
141
142 #define PROCSTAT_NAME_LEN 256
143 typedef struct procstat
144 {
145         char          name[PROCSTAT_NAME_LEN];
146 #if HAVE_REGEX_H
147         regex_t *re;
148 #endif
149
150         unsigned long num_proc;
151         unsigned long num_lwp;
152         unsigned long vmem_size;
153         unsigned long vmem_rss;
154         unsigned long stack_size;
155
156         unsigned long vmem_minflt_counter;
157         unsigned long vmem_majflt_counter;
158
159         unsigned long cpu_user_counter;
160         unsigned long cpu_system_counter;
161
162         struct procstat   *next;
163         struct procstat_entry_s *instances;
164 } procstat_t;
165
166 static procstat_t *list_head_g = NULL;
167
168 #if HAVE_THREAD_INFO
169 static mach_port_t port_host_self;
170 static mach_port_t port_task_self;
171
172 static processor_set_name_array_t pset_list;
173 static mach_msg_type_number_t     pset_list_len;
174 /* #endif HAVE_THREAD_INFO */
175
176 #elif KERNEL_LINUX
177 static long pagesize_g;
178 /* #endif KERNEL_LINUX */
179
180 #elif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD
181 /* no global variables */
182 #endif /* HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD */
183
184 /* put name of process from config to list_head_g tree
185    list_head_g is a list of 'procstat_t' structs with
186    processes names we want to watch */
187 static void ps_list_register (const char *name, const char *regexp)
188 {
189         procstat_t *new;
190         procstat_t *ptr;
191         int status;
192
193         new = (procstat_t *) malloc (sizeof (procstat_t));
194         if (new == NULL)
195         {
196                 ERROR ("processes plugin: ps_list_register: malloc failed.");
197                 return;
198         }
199         memset (new, 0, sizeof (procstat_t));
200         sstrncpy (new->name, name, sizeof (new->name));
201
202 #if HAVE_REGEX_H
203         if (regexp != NULL)
204         {
205                 DEBUG ("ProcessMatch: adding \"%s\" as criteria to process %s.", regexp, name);
206                 new->re = (regex_t *) malloc (sizeof (regex_t));
207                 if (new->re == NULL)
208                 {
209                         ERROR ("processes plugin: ps_list_register: malloc failed.");
210                         sfree (new);
211                         return;
212                 }
213
214                 status = regcomp (new->re, regexp, REG_EXTENDED | REG_NOSUB);
215                 if (status != 0)
216                 {
217                         DEBUG ("ProcessMatch: compiling the regular expression \"%s\" failed.", regexp);
218                         sfree(new->re);
219                         return;
220                 }
221         }
222 #else
223         if (regexp != NULL)
224         {
225                 ERROR ("processes plugin: ps_list_register: "
226                                 "Regular expression \"%s\" found in config "
227                                 "file, but support for regular expressions "
228                                 "has been dispabled at compile time.",
229                                 regexp);
230                 sfree (new);
231                 return;
232         }
233 #endif
234         
235         for (ptr = list_head_g; ptr != NULL; ptr = ptr->next)
236         {
237                 if (strcmp (ptr->name, name) == 0)
238                 {
239                         WARNING ("processes plugin: You have configured more "
240                                         "than one `Process' or "
241                                         "`ProcessMatch' with the same name. "
242                                         "All but the first setting will be "
243                                         "ignored.");
244                         sfree (new->re);
245                         sfree (new);
246                         return;
247                 }
248
249                 if (ptr->next == NULL)
250                         break;
251         }
252
253         if (ptr == NULL)
254                 list_head_g = new;
255         else
256                 ptr->next = new;
257 } /* void ps_list_register */
258
259 /* try to match name against entry, returns 1 if success */
260 static int ps_list_match (const char *name, const char *cmdline, procstat_t *ps)
261 {
262 #if HAVE_REGEX_H
263         if (ps->re != NULL)
264         {
265                 int status;
266                 const char *str;
267
268                 str = cmdline;
269                 if ((str == NULL) || (str[0] == 0))
270                         str = name;
271
272                 assert (str != NULL);
273
274                 status = regexec (ps->re, str,
275                                 /* nmatch = */ 0,
276                                 /* pmatch = */ NULL,
277                                 /* eflags = */ 0);
278                 if (status == 0)
279                         return (1);
280         }
281         else
282 #endif
283         if (strcmp (ps->name, name) == 0)
284                 return (1);
285
286         return (0);
287 } /* int ps_list_match */
288
289 /* add process entry to 'instances' of process 'name' (or refresh it) */
290 static void ps_list_add (const char *name, const char *cmdline, procstat_entry_t *entry)
291 {
292         procstat_t *ps;
293         procstat_entry_t *pse;
294
295         if (entry->id == 0)
296                 return;
297
298         for (ps = list_head_g; ps != NULL; ps = ps->next)
299         {
300                 if ((ps_list_match (name, cmdline, ps)) == 0)
301                         continue;
302
303                 for (pse = ps->instances; pse != NULL; pse = pse->next)
304                         if ((pse->id == entry->id) || (pse->next == NULL))
305                                 break;
306
307                 if ((pse == NULL) || (pse->id != entry->id))
308                 {
309                         procstat_entry_t *new;
310                         
311                         new = (procstat_entry_t *) malloc (sizeof (procstat_entry_t));
312                         if (new == NULL)
313                                 return;
314                         memset (new, 0, sizeof (procstat_entry_t));
315                         new->id = entry->id;
316                         
317                         if (pse == NULL)
318                                 ps->instances = new;
319                         else
320                                 pse->next = new;
321
322                         pse = new;
323                 }
324
325                 pse->age = 0;
326                 pse->num_proc   = entry->num_proc;
327                 pse->num_lwp    = entry->num_lwp;
328                 pse->vmem_size  = entry->vmem_size;
329                 pse->vmem_rss   = entry->vmem_rss;
330                 pse->stack_size = entry->stack_size;
331
332                 ps->num_proc   += pse->num_proc;
333                 ps->num_lwp    += pse->num_lwp;
334                 ps->vmem_size  += pse->vmem_size;
335                 ps->vmem_rss   += pse->vmem_rss;
336                 ps->stack_size += pse->stack_size;
337
338                 if ((entry->vmem_minflt_counter == 0)
339                                 && (entry->vmem_majflt_counter == 0))
340                 {
341                         pse->vmem_minflt_counter += entry->vmem_minflt;
342                         pse->vmem_minflt = entry->vmem_minflt;
343
344                         pse->vmem_majflt_counter += entry->vmem_majflt;
345                         pse->vmem_majflt = entry->vmem_majflt;
346                 }
347                 else
348                 {
349                         if (entry->vmem_minflt_counter < pse->vmem_minflt_counter)
350                         {
351                                 pse->vmem_minflt = entry->vmem_minflt_counter
352                                         + (ULONG_MAX - pse->vmem_minflt_counter);
353                         }
354                         else
355                         {
356                                 pse->vmem_minflt = entry->vmem_minflt_counter - pse->vmem_minflt_counter;
357                         }
358                         pse->vmem_minflt_counter = entry->vmem_minflt_counter;
359                         
360                         if (entry->vmem_majflt_counter < pse->vmem_majflt_counter)
361                         {
362                                 pse->vmem_majflt = entry->vmem_majflt_counter
363                                         + (ULONG_MAX - pse->vmem_majflt_counter);
364                         }
365                         else
366                         {
367                                 pse->vmem_majflt = entry->vmem_majflt_counter - pse->vmem_majflt_counter;
368                         }
369                         pse->vmem_majflt_counter = entry->vmem_majflt_counter;
370                 }
371
372                 ps->vmem_minflt_counter += pse->vmem_minflt;
373                 ps->vmem_majflt_counter += pse->vmem_majflt;
374
375                 if ((entry->cpu_user_counter == 0)
376                                 && (entry->cpu_system_counter == 0))
377                 {
378                         pse->cpu_user_counter += entry->cpu_user;
379                         pse->cpu_user = entry->cpu_user;
380
381                         pse->cpu_system_counter += entry->cpu_system;
382                         pse->cpu_system = entry->cpu_system;
383                 }
384                 else
385                 {
386                         if (entry->cpu_user_counter < pse->cpu_user_counter)
387                         {
388                                 pse->cpu_user = entry->cpu_user_counter
389                                         + (ULONG_MAX - pse->cpu_user_counter);
390                         }
391                         else
392                         {
393                                 pse->cpu_user = entry->cpu_user_counter - pse->cpu_user_counter;
394                         }
395                         pse->cpu_user_counter = entry->cpu_user_counter;
396                         
397                         if (entry->cpu_system_counter < pse->cpu_system_counter)
398                         {
399                                 pse->cpu_system = entry->cpu_system_counter
400                                         + (ULONG_MAX - pse->cpu_system_counter);
401                         }
402                         else
403                         {
404                                 pse->cpu_system = entry->cpu_system_counter - pse->cpu_system_counter;
405                         }
406                         pse->cpu_system_counter = entry->cpu_system_counter;
407                 }
408
409                 ps->cpu_user_counter   += pse->cpu_user;
410                 ps->cpu_system_counter += pse->cpu_system;
411         }
412 }
413
414 /* remove old entries from instances of processes in list_head_g */
415 static void ps_list_reset (void)
416 {
417         procstat_t *ps;
418         procstat_entry_t *pse;
419         procstat_entry_t *pse_prev;
420
421         for (ps = list_head_g; ps != NULL; ps = ps->next)
422         {
423                 ps->num_proc    = 0;
424                 ps->num_lwp     = 0;
425                 ps->vmem_size   = 0;
426                 ps->vmem_rss    = 0;
427                 ps->stack_size  = 0;
428
429                 pse_prev = NULL;
430                 pse = ps->instances;
431                 while (pse != NULL)
432                 {
433                         if (pse->age > 10)
434                         {
435                                 DEBUG ("Removing this procstat entry cause it's too old: "
436                                                 "id = %lu; name = %s;",
437                                                 pse->id, ps->name);
438
439                                 if (pse_prev == NULL)
440                                 {
441                                         ps->instances = pse->next;
442                                         free (pse);
443                                         pse = ps->instances;
444                                 }
445                                 else
446                                 {
447                                         pse_prev->next = pse->next;
448                                         free (pse);
449                                         pse = pse_prev->next;
450                                 }
451                         }
452                         else
453                         {
454                                 pse->age++;
455                                 pse_prev = pse;
456                                 pse = pse->next;
457                         }
458                 } /* while (pse != NULL) */
459         } /* for (ps = list_head_g; ps != NULL; ps = ps->next) */
460 }
461
462 /* put all pre-defined 'Process' names from config to list_head_g tree */
463 static int ps_config (const char *key, const char *value)
464 {
465         if (strcasecmp (key, "Process") == 0)
466         {
467                 ps_list_register (value, NULL);
468         }
469         else if (strcasecmp (key, "ProcessMatch") == 0)
470         {
471                 char *new_val;
472                 char *fields[3];
473                 int fields_num;
474
475                 new_val = strdup (value);
476                 if (new_val == NULL) {
477                         ERROR ("processes plugin: strdup failed when processing "
478                                         "`ProcessMatch %s'.", value);
479                         return (1);
480                 }
481
482                 fields_num = strsplit (new_val, fields,
483                                 STATIC_ARRAY_SIZE (fields));
484                 if (fields_num != 2)
485                 {
486                         ERROR ("processes plugin: `ProcessMatch' needs exactly "
487                                         "two string arguments.");
488                         sfree (new_val);
489                         return (1);
490                 }
491                 ps_list_register (fields[0], fields[1]);
492                 sfree (new_val);
493         }
494         else
495         {
496                 ERROR ("processes plugin: The `%s' configuration option is not "
497                                 "understood and will be ignored.", key);
498                 return (-1);
499         }
500
501         return (0);
502 }
503
504 static int ps_init (void)
505 {
506 #if HAVE_THREAD_INFO
507         kern_return_t status;
508
509         port_host_self = mach_host_self ();
510         port_task_self = mach_task_self ();
511
512         if (pset_list != NULL)
513         {
514                 vm_deallocate (port_task_self,
515                                 (vm_address_t) pset_list,
516                                 pset_list_len * sizeof (processor_set_t));
517                 pset_list = NULL;
518                 pset_list_len = 0;
519         }
520
521         if ((status = host_processor_sets (port_host_self,
522                                         &pset_list,
523                                         &pset_list_len)) != KERN_SUCCESS)
524         {
525                 ERROR ("host_processor_sets failed: %s\n",
526                                 mach_error_string (status));
527                 pset_list = NULL;
528                 pset_list_len = 0;
529                 return (-1);
530         }
531 /* #endif HAVE_THREAD_INFO */
532
533 #elif KERNEL_LINUX
534         pagesize_g = sysconf(_SC_PAGESIZE);
535         DEBUG ("pagesize_g = %li; CONFIG_HZ = %i;",
536                         pagesize_g, CONFIG_HZ);
537 /* #endif KERNEL_LINUX */
538
539 #elif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD
540 /* no initialization */
541 #endif /* HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD */
542
543         return (0);
544 } /* int ps_init */
545
546 /* submit global state (e.g.: qty of zombies, running, etc..) */
547 static void ps_submit_state (const char *state, double value)
548 {
549         value_t values[1];
550         value_list_t vl = VALUE_LIST_INIT;
551
552         values[0].gauge = value;
553
554         vl.values = values;
555         vl.values_len = 1;
556         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
557         sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
558         sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
559         sstrncpy (vl.type, "ps_state", sizeof (vl.type));
560         sstrncpy (vl.type_instance, state, sizeof (vl.type_instance));
561
562         plugin_dispatch_values (&vl);
563 }
564
565 /* submit info about specific process (e.g.: memory taken, cpu usage, etc..) */
566 static void ps_submit_proc_list (procstat_t *ps)
567 {
568         value_t values[2];
569         value_list_t vl = VALUE_LIST_INIT;
570
571         vl.values = values;
572         vl.values_len = 2;
573         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
574         sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
575         sstrncpy (vl.plugin_instance, ps->name, sizeof (vl.plugin_instance));
576
577         sstrncpy (vl.type, "ps_vm", sizeof (vl.type));
578         vl.values[0].gauge = ps->vmem_size;
579         vl.values_len = 1;
580         plugin_dispatch_values (&vl);
581
582         sstrncpy (vl.type, "ps_rss", sizeof (vl.type));
583         vl.values[0].gauge = ps->vmem_rss;
584         vl.values_len = 1;
585         plugin_dispatch_values (&vl);
586
587         sstrncpy (vl.type, "ps_stacksize", sizeof (vl.type));
588         vl.values[0].gauge = ps->stack_size;
589         vl.values_len = 1;
590         plugin_dispatch_values (&vl);
591
592         sstrncpy (vl.type, "ps_cputime", sizeof (vl.type));
593         vl.values[0].counter = ps->cpu_user_counter;
594         vl.values[1].counter = ps->cpu_system_counter;
595         vl.values_len = 2;
596         plugin_dispatch_values (&vl);
597
598         sstrncpy (vl.type, "ps_count", sizeof (vl.type));
599         vl.values[0].gauge = ps->num_proc;
600         vl.values[1].gauge = ps->num_lwp;
601         vl.values_len = 2;
602         plugin_dispatch_values (&vl);
603
604         sstrncpy (vl.type, "ps_pagefaults", sizeof (vl.type));
605         vl.values[0].counter = ps->vmem_minflt_counter;
606         vl.values[1].counter = ps->vmem_majflt_counter;
607         vl.values_len = 2;
608         plugin_dispatch_values (&vl);
609
610         DEBUG ("name = %s; num_proc = %lu; num_lwp = %lu; vmem_rss = %lu; "
611                         "vmem_minflt_counter = %lu; vmem_majflt_counter = %lu; "
612                         "cpu_user_counter = %lu; cpu_system_counter = %lu;",
613                         ps->name, ps->num_proc, ps->num_lwp, ps->vmem_rss,
614                         ps->vmem_minflt_counter, ps->vmem_majflt_counter,
615                         ps->cpu_user_counter, ps->cpu_system_counter);
616 } /* void ps_submit_proc_list */
617
618 /* ------- additional functions for KERNEL_LINUX/HAVE_THREAD_INFO ------- */
619 #if KERNEL_LINUX
620 static int ps_read_tasks (int pid)
621 {
622         char           dirname[64];
623         DIR           *dh;
624         struct dirent *ent;
625         int count = 0;
626
627         ssnprintf (dirname, sizeof (dirname), "/proc/%i/task", pid);
628
629         if ((dh = opendir (dirname)) == NULL)
630         {
631                 DEBUG ("Failed to open directory `%s'", dirname);
632                 return (-1);
633         }
634
635         while ((ent = readdir (dh)) != NULL)
636         {
637                 if (!isdigit ((int) ent->d_name[0]))
638                         continue;
639                 else
640                         count++;
641         }
642         closedir (dh);
643
644         return ((count >= 1) ? count : 1);
645 } /* int *ps_read_tasks */
646
647 int ps_read_process (int pid, procstat_t *ps, char *state)
648 {
649         char  filename[64];
650         char  buffer[1024];
651
652         char *fields[64];
653         char  fields_len;
654
655         int   i;
656
657         int   ppid;
658         int   name_len;
659
660         long long unsigned cpu_user_counter;
661         long long unsigned cpu_system_counter;
662         long long unsigned vmem_size;
663         long long unsigned vmem_rss;
664         long long unsigned stack_size;
665
666         memset (ps, 0, sizeof (procstat_t));
667
668         ssnprintf (filename, sizeof (filename), "/proc/%i/stat", pid);
669
670         i = read_file_contents (filename, buffer, sizeof(buffer) - 1);
671         if (i <= 0)
672                 return (-1);
673         buffer[i] = 0;
674
675         fields_len = strsplit (buffer, fields, 64);
676         if (fields_len < 24)
677         {
678                 DEBUG ("processes plugin: ps_read_process (pid = %i):"
679                                 " `%s' has only %i fields..",
680                                 (int) pid, filename, fields_len);
681                 return (-1);
682         }
683
684         /* copy the name, strip brackets in the process */
685         name_len = strlen (fields[1]) - 2;
686         if ((fields[1][0] != '(') || (fields[1][name_len + 1] != ')'))
687         {
688                 DEBUG ("No brackets found in process name: `%s'", fields[1]);
689                 return (-1);
690         }
691         fields[1] = fields[1] + 1;
692         fields[1][name_len] = '\0';
693         strncpy (ps->name, fields[1], PROCSTAT_NAME_LEN);
694
695         ppid = atoi (fields[3]);
696
697         *state = fields[2][0];
698
699         if (*state == 'Z')
700         {
701                 ps->num_lwp  = 0;
702                 ps->num_proc = 0;
703         }
704         else
705         {
706                 if ( (ps->num_lwp = ps_read_tasks (pid)) == -1 )
707                 {
708                         /* returns -1 => kernel 2.4 */
709                         ps->num_lwp = 1;
710                 }
711                 ps->num_proc = 1;
712         }
713
714         /* Leave the rest at zero if this is only a zombi */
715         if (ps->num_proc == 0)
716         {
717                 DEBUG ("processes plugin: This is only a zombi: pid = %i; "
718                                 "name = %s;", pid, ps->name);
719                 return (0);
720         }
721
722         cpu_user_counter   = atoll (fields[13]);
723         cpu_system_counter = atoll (fields[14]);
724         vmem_size          = atoll (fields[22]);
725         vmem_rss           = atoll (fields[23]);
726         ps->vmem_minflt_counter = atol (fields[9]);
727         ps->vmem_majflt_counter = atol (fields[11]);
728
729         {
730                 unsigned long long stack_start = atoll (fields[27]);
731                 unsigned long long stack_ptr   = atoll (fields[28]);
732
733                 stack_size = (stack_start > stack_ptr)
734                         ? stack_start - stack_ptr
735                         : stack_ptr - stack_start;
736         }
737
738         /* Convert jiffies to useconds */
739         cpu_user_counter   = cpu_user_counter   * 1000000 / CONFIG_HZ;
740         cpu_system_counter = cpu_system_counter * 1000000 / CONFIG_HZ;
741         vmem_rss = vmem_rss * pagesize_g;
742
743         ps->cpu_user_counter = (unsigned long) cpu_user_counter;
744         ps->cpu_system_counter = (unsigned long) cpu_system_counter;
745         ps->vmem_size = (unsigned long) vmem_size;
746         ps->vmem_rss = (unsigned long) vmem_rss;
747         ps->stack_size = (unsigned long) stack_size;
748
749         /* success */
750         return (0);
751 } /* int ps_read_process (...) */
752
753 static char *ps_get_cmdline (pid_t pid, char *name, char *buf, size_t buf_len)
754 {
755         char  *buf_ptr;
756         size_t len;
757
758         char file[PATH_MAX];
759         int  fd;
760
761         size_t n;
762
763         if ((pid < 1) || (NULL == buf) || (buf_len < 2))
764                 return NULL;
765
766         ssnprintf (file, sizeof (file), "/proc/%u/cmdline", pid);
767
768         fd = open (file, O_RDONLY);
769         if (fd < 0) {
770                 char errbuf[4096];
771                 WARNING ("processes plugin: Failed to open `%s': %s.", file,
772                                 sstrerror (errno, errbuf, sizeof (errbuf)));
773                 return NULL;
774         }
775
776         buf_ptr = buf;
777         len     = buf_len;
778
779         n = 0;
780
781         while (42) {
782                 ssize_t status;
783
784                 status = read (fd, (void *)buf_ptr, len);
785
786                 if (status < 0) {
787                         char errbuf[4096];
788
789                         if ((EAGAIN == errno) || (EINTR == errno))
790                                 continue;
791
792                         WARNING ("processes plugin: Failed to read from `%s': %s.", file,
793                                         sstrerror (errno, errbuf, sizeof (errbuf)));
794                         close (fd);
795                         return NULL;
796                 }
797
798                 n += status;
799
800                 if (status == 0)
801                         break;
802
803                 buf_ptr += status;
804                 len     -= status;
805
806                 if (len <= 0)
807                         break;
808         }
809
810         close (fd);
811
812         if (0 == n) {
813                 /* cmdline not available; e.g. kernel thread, zombie */
814                 if (NULL == name)
815                         return NULL;
816
817                 ssnprintf (buf, buf_len, "[%s]", name);
818                 return buf;
819         }
820
821         assert (n <= buf_len);
822
823         if (n == buf_len)
824                 --n;
825         buf[n] = '\0';
826
827         --n;
828         /* remove trailing whitespace */
829         while ((n > 0) && (isspace (buf[n]) || ('\0' == buf[n]))) {
830                 buf[n] = '\0';
831                 --n;
832         }
833
834         /* arguments are separated by '\0' in /proc/<pid>/cmdline */
835         while (n > 0) {
836                 if ('\0' == buf[n])
837                         buf[n] = ' ';
838                 --n;
839         }
840         return buf;
841 } /* char *ps_get_cmdline (...) */
842 #endif /* KERNEL_LINUX */
843
844 #if HAVE_THREAD_INFO
845 static int mach_get_task_name (task_t t, int *pid, char *name, size_t name_max_len)
846 {
847         int mib[4];
848
849         struct kinfo_proc kp;
850         size_t            kp_size;
851
852         mib[0] = CTL_KERN;
853         mib[1] = KERN_PROC;
854         mib[2] = KERN_PROC_PID;
855
856         if (pid_for_task (t, pid) != KERN_SUCCESS)
857                 return (-1);
858         mib[3] = *pid;
859
860         kp_size = sizeof (kp);
861         if (sysctl (mib, 4, &kp, &kp_size, NULL, 0) != 0)
862                 return (-1);
863
864         if (name_max_len > (MAXCOMLEN + 1))
865                 name_max_len = MAXCOMLEN + 1;
866
867         strncpy (name, kp.kp_proc.p_comm, name_max_len - 1);
868         name[name_max_len - 1] = '\0';
869
870         DEBUG ("pid = %i; name = %s;", *pid, name);
871
872         /* We don't do the special handling for `p_comm == "LaunchCFMApp"' as
873          * `top' does it, because it is a lot of work and only used when
874          * debugging. -octo */
875
876         return (0);
877 }
878 #endif /* HAVE_THREAD_INFO */
879 /* ------- end of additional functions for KERNEL_LINUX/HAVE_THREAD_INFO ------- */
880
881 /* do actual readings from kernel */
882 static int ps_read (void)
883 {
884 #if HAVE_THREAD_INFO
885         kern_return_t            status;
886
887         int                      pset;
888         processor_set_t          port_pset_priv;
889
890         int                      task;
891         task_array_t             task_list;
892         mach_msg_type_number_t   task_list_len;
893
894         int                      task_pid;
895         char                     task_name[MAXCOMLEN + 1];
896
897         int                      thread;
898         thread_act_array_t       thread_list;
899         mach_msg_type_number_t   thread_list_len;
900         thread_basic_info_data_t thread_data;
901         mach_msg_type_number_t   thread_data_len;
902
903         int running  = 0;
904         int sleeping = 0;
905         int zombies  = 0;
906         int stopped  = 0;
907         int blocked  = 0;
908
909         procstat_t *ps;
910         procstat_entry_t pse;
911
912         ps_list_reset ();
913
914         /*
915          * The Mach-concept is a little different from the traditional UNIX
916          * concept: All the work is done in threads. Threads are contained in
917          * `tasks'. Therefore, `task status' doesn't make much sense, since
918          * it's actually a `thread status'.
919          * Tasks are assigned to sets of processors, so that's where you go to
920          * get a list.
921          */
922         for (pset = 0; pset < pset_list_len; pset++)
923         {
924                 if ((status = host_processor_set_priv (port_host_self,
925                                                 pset_list[pset],
926                                                 &port_pset_priv)) != KERN_SUCCESS)
927                 {
928                         ERROR ("host_processor_set_priv failed: %s\n",
929                                         mach_error_string (status));
930                         continue;
931                 }
932
933                 if ((status = processor_set_tasks (port_pset_priv,
934                                                 &task_list,
935                                                 &task_list_len)) != KERN_SUCCESS)
936                 {
937                         ERROR ("processor_set_tasks failed: %s\n",
938                                         mach_error_string (status));
939                         mach_port_deallocate (port_task_self, port_pset_priv);
940                         continue;
941                 }
942
943                 for (task = 0; task < task_list_len; task++)
944                 {
945                         ps = NULL;
946                         if (mach_get_task_name (task_list[task],
947                                                 &task_pid,
948                                                 task_name, PROCSTAT_NAME_LEN) == 0)
949                         {
950                                 /* search for at least one match */
951                                 for (ps = list_head_g; ps != NULL; ps = ps->next)
952                                         /* FIXME: cmdline should be here instead of NULL */
953                                         if (ps_list_match (task_name, NULL, ps) == 1)
954                                                 break;
955                         }
956
957                         /* Collect more detailed statistics for this process */
958                         if (ps != NULL)
959                         {
960                                 task_basic_info_data_t        task_basic_info;
961                                 mach_msg_type_number_t        task_basic_info_len;
962                                 task_events_info_data_t       task_events_info;
963                                 mach_msg_type_number_t        task_events_info_len;
964                                 task_absolutetime_info_data_t task_absolutetime_info;
965                                 mach_msg_type_number_t        task_absolutetime_info_len;
966
967                                 memset (&pse, '\0', sizeof (pse));
968                                 pse.id = task_pid;
969
970                                 task_basic_info_len = TASK_BASIC_INFO_COUNT;
971                                 status = task_info (task_list[task],
972                                                 TASK_BASIC_INFO,
973                                                 (task_info_t) &task_basic_info,
974                                                 &task_basic_info_len);
975                                 if (status != KERN_SUCCESS)
976                                 {
977                                         ERROR ("task_info failed: %s",
978                                                         mach_error_string (status));
979                                         continue; /* with next thread_list */
980                                 }
981
982                                 task_events_info_len = TASK_EVENTS_INFO_COUNT;
983                                 status = task_info (task_list[task],
984                                                 TASK_EVENTS_INFO,
985                                                 (task_info_t) &task_events_info,
986                                                 &task_events_info_len);
987                                 if (status != KERN_SUCCESS)
988                                 {
989                                         ERROR ("task_info failed: %s",
990                                                         mach_error_string (status));
991                                         continue; /* with next thread_list */
992                                 }
993
994                                 task_absolutetime_info_len = TASK_ABSOLUTETIME_INFO_COUNT;
995                                 status = task_info (task_list[task],
996                                                 TASK_ABSOLUTETIME_INFO,
997                                                 (task_info_t) &task_absolutetime_info,
998                                                 &task_absolutetime_info_len);
999                                 if (status != KERN_SUCCESS)
1000                                 {
1001                                         ERROR ("task_info failed: %s",
1002                                                         mach_error_string (status));
1003                                         continue; /* with next thread_list */
1004                                 }
1005
1006                                 pse.num_proc++;
1007                                 pse.vmem_rss = task_basic_info.resident_size;
1008
1009                                 pse.vmem_minflt_counter = task_events_info.cow_faults;
1010                                 pse.vmem_majflt_counter = task_events_info.faults;
1011
1012                                 pse.cpu_user_counter = task_absolutetime_info.total_user;
1013                                 pse.cpu_system_counter = task_absolutetime_info.total_system;
1014                         }
1015
1016                         status = task_threads (task_list[task], &thread_list,
1017                                         &thread_list_len);
1018                         if (status != KERN_SUCCESS)
1019                         {
1020                                 /* Apple's `top' treats this case a zombie. It
1021                                  * makes sense to some extend: A `zombie'
1022                                  * thread is nonsense, since the task/process
1023                                  * is dead. */
1024                                 zombies++;
1025                                 DEBUG ("task_threads failed: %s",
1026                                                 mach_error_string (status));
1027                                 if (task_list[task] != port_task_self)
1028                                         mach_port_deallocate (port_task_self,
1029                                                         task_list[task]);
1030                                 continue; /* with next task_list */
1031                         }
1032
1033                         for (thread = 0; thread < thread_list_len; thread++)
1034                         {
1035                                 thread_data_len = THREAD_BASIC_INFO_COUNT;
1036                                 status = thread_info (thread_list[thread],
1037                                                 THREAD_BASIC_INFO,
1038                                                 (thread_info_t) &thread_data,
1039                                                 &thread_data_len);
1040                                 if (status != KERN_SUCCESS)
1041                                 {
1042                                         ERROR ("thread_info failed: %s",
1043                                                         mach_error_string (status));
1044                                         if (task_list[task] != port_task_self)
1045                                                 mach_port_deallocate (port_task_self,
1046                                                                 thread_list[thread]);
1047                                         continue; /* with next thread_list */
1048                                 }
1049
1050                                 if (ps != NULL)
1051                                         pse.num_lwp++;
1052
1053                                 switch (thread_data.run_state)
1054                                 {
1055                                         case TH_STATE_RUNNING:
1056                                                 running++;
1057                                                 break;
1058                                         case TH_STATE_STOPPED:
1059                                         /* What exactly is `halted'? */
1060                                         case TH_STATE_HALTED:
1061                                                 stopped++;
1062                                                 break;
1063                                         case TH_STATE_WAITING:
1064                                                 sleeping++;
1065                                                 break;
1066                                         case TH_STATE_UNINTERRUPTIBLE:
1067                                                 blocked++;
1068                                                 break;
1069                                         /* There is no `zombie' case here,
1070                                          * since there are no zombie-threads.
1071                                          * There's only zombie tasks, which are
1072                                          * handled above. */
1073                                         default:
1074                                                 WARNING ("Unknown thread status: %i",
1075                                                                 thread_data.run_state);
1076                                                 break;
1077                                 } /* switch (thread_data.run_state) */
1078
1079                                 if (task_list[task] != port_task_self)
1080                                 {
1081                                         status = mach_port_deallocate (port_task_self,
1082                                                         thread_list[thread]);
1083                                         if (status != KERN_SUCCESS)
1084                                                 ERROR ("mach_port_deallocate failed: %s",
1085                                                                 mach_error_string (status));
1086                                 }
1087                         } /* for (thread_list) */
1088
1089                         if ((status = vm_deallocate (port_task_self,
1090                                                         (vm_address_t) thread_list,
1091                                                         thread_list_len * sizeof (thread_act_t)))
1092                                         != KERN_SUCCESS)
1093                         {
1094                                 ERROR ("vm_deallocate failed: %s",
1095                                                 mach_error_string (status));
1096                         }
1097                         thread_list = NULL;
1098                         thread_list_len = 0;
1099
1100                         /* Only deallocate the task port, if it isn't our own.
1101                          * Don't know what would happen in that case, but this
1102                          * is what Apple's top does.. ;) */
1103                         if (task_list[task] != port_task_self)
1104                         {
1105                                 status = mach_port_deallocate (port_task_self,
1106                                                 task_list[task]);
1107                                 if (status != KERN_SUCCESS)
1108                                         ERROR ("mach_port_deallocate failed: %s",
1109                                                         mach_error_string (status));
1110                         }
1111
1112                         if (ps != NULL)
1113                                 /* FIXME: cmdline should be here instead of NULL */
1114                                 ps_list_add (task_name, NULL, &pse);
1115                 } /* for (task_list) */
1116
1117                 if ((status = vm_deallocate (port_task_self,
1118                                 (vm_address_t) task_list,
1119                                 task_list_len * sizeof (task_t))) != KERN_SUCCESS)
1120                 {
1121                         ERROR ("vm_deallocate failed: %s",
1122                                         mach_error_string (status));
1123                 }
1124                 task_list = NULL;
1125                 task_list_len = 0;
1126
1127                 if ((status = mach_port_deallocate (port_task_self, port_pset_priv))
1128                                 != KERN_SUCCESS)
1129                 {
1130                         ERROR ("mach_port_deallocate failed: %s",
1131                                         mach_error_string (status));
1132                 }
1133         } /* for (pset_list) */
1134
1135         ps_submit_state ("running", running);
1136         ps_submit_state ("sleeping", sleeping);
1137         ps_submit_state ("zombies", zombies);
1138         ps_submit_state ("stopped", stopped);
1139         ps_submit_state ("blocked", blocked);
1140
1141         for (ps = list_head_g; ps != NULL; ps = ps->next)
1142                 ps_submit_proc_list (ps);
1143 /* #endif HAVE_THREAD_INFO */
1144
1145 #elif KERNEL_LINUX
1146         int running  = 0;
1147         int sleeping = 0;
1148         int zombies  = 0;
1149         int stopped  = 0;
1150         int paging   = 0;
1151         int blocked  = 0;
1152
1153         struct dirent *ent;
1154         DIR           *proc;
1155         int            pid;
1156
1157         char cmdline[ARG_MAX];
1158
1159         int        status;
1160         procstat_t ps;
1161         procstat_entry_t pse;
1162         char       state;
1163
1164         procstat_t *ps_ptr;
1165
1166         running = sleeping = zombies = stopped = paging = blocked = 0;
1167         ps_list_reset ();
1168
1169         if ((proc = opendir ("/proc")) == NULL)
1170         {
1171                 char errbuf[1024];
1172                 ERROR ("Cannot open `/proc': %s",
1173                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1174                 return (-1);
1175         }
1176
1177         while ((ent = readdir (proc)) != NULL)
1178         {
1179                 if (!isdigit (ent->d_name[0]))
1180                         continue;
1181
1182                 if ((pid = atoi (ent->d_name)) < 1)
1183                         continue;
1184
1185                 status = ps_read_process (pid, &ps, &state);
1186                 if (status != 0)
1187                 {
1188                         DEBUG ("ps_read_process failed: %i", status);
1189                         continue;
1190                 }
1191
1192                 pse.id       = pid;
1193                 pse.age      = 0;
1194
1195                 pse.num_proc   = ps.num_proc;
1196                 pse.num_lwp    = ps.num_lwp;
1197                 pse.vmem_size  = ps.vmem_size;
1198                 pse.vmem_rss   = ps.vmem_rss;
1199                 pse.stack_size = ps.stack_size;
1200
1201                 pse.vmem_minflt = 0;
1202                 pse.vmem_minflt_counter = ps.vmem_minflt_counter;
1203                 pse.vmem_majflt = 0;
1204                 pse.vmem_majflt_counter = ps.vmem_majflt_counter;
1205
1206                 pse.cpu_user = 0;
1207                 pse.cpu_user_counter = ps.cpu_user_counter;
1208                 pse.cpu_system = 0;
1209                 pse.cpu_system_counter = ps.cpu_system_counter;
1210
1211                 switch (state)
1212                 {
1213                         case 'R': running++;  break;
1214                         case 'S': sleeping++; break;
1215                         case 'D': blocked++;  break;
1216                         case 'Z': zombies++;  break;
1217                         case 'T': stopped++;  break;
1218                         case 'W': paging++;   break;
1219                 }
1220
1221                 ps_list_add (ps.name,
1222                                 ps_get_cmdline (pid, ps.name, cmdline, sizeof (cmdline)),
1223                                 &pse);
1224         }
1225
1226         closedir (proc);
1227
1228         ps_submit_state ("running",  running);
1229         ps_submit_state ("sleeping", sleeping);
1230         ps_submit_state ("zombies",  zombies);
1231         ps_submit_state ("stopped",  stopped);
1232         ps_submit_state ("paging",   paging);
1233         ps_submit_state ("blocked",  blocked);
1234
1235         for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
1236                 ps_submit_proc_list (ps_ptr);
1237 /* #endif KERNEL_LINUX */
1238
1239 #elif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD
1240         int running  = 0;
1241         int sleeping = 0;
1242         int zombies  = 0;
1243         int stopped  = 0;
1244         int blocked  = 0;
1245         int idle     = 0;
1246         int wait     = 0;
1247
1248         kvm_t *kd;
1249         char errbuf[1024];
1250         char cmdline[ARG_MAX];
1251         char *cmdline_ptr;
1252         struct kinfo_proc *procs;          /* array of processes */
1253         char **argv;
1254         int count;                         /* returns number of processes */
1255         int i;
1256
1257         procstat_t *ps_ptr;
1258         procstat_entry_t pse;
1259
1260         ps_list_reset ();
1261
1262         /* Open the kvm interface, get a descriptor */
1263         kd = kvm_open (NULL, NULL, NULL, 0, errbuf);
1264         if (kd == NULL)
1265         {
1266                 ERROR ("processes plugin: Cannot open kvm interface: %s",
1267                                 errbuf);
1268                 return (0);
1269         }
1270
1271         /* Get the list of processes. */
1272         procs = kvm_getprocs(kd, KERN_PROC_ALL, 0, &count);
1273         if (procs == NULL)
1274         {
1275                 kvm_close (kd);
1276                 ERROR ("processes plugin: Cannot get kvm processes list: %s",
1277                                 kvm_geterr(kd));
1278                 return (0);
1279         }
1280
1281         /* Iterate through the processes in kinfo_proc */
1282         for (i = 0; i < count; i++)
1283         {
1284                 /* retrieve the arguments */
1285                 cmdline[0] = 0;
1286                 cmdline_ptr = NULL;
1287
1288                 argv = kvm_getargv (kd, (const struct kinfo_proc *) &(procs[i]), 0);
1289                 if (argv != NULL)
1290                 {
1291                         int status;
1292                         int argc;
1293
1294                         argc = 0;
1295                         while (argv[argc] != NULL)
1296                                 argc++;
1297
1298                         status = strjoin (cmdline, sizeof (cmdline),
1299                                         argv, argc, " ");
1300
1301                         if (status < 0)
1302                         {
1303                                 WARNING ("processes plugin: Command line did "
1304                                                 "not fit into buffer.");
1305                         }
1306                         else
1307                         {
1308                                 cmdline_ptr = &cmdline[0];
1309                         }
1310                 }
1311
1312                 pse.id       = procs[i].ki_pid;
1313                 pse.age      = 0;
1314
1315                 pse.num_proc = 1;
1316                 pse.num_lwp  = procs[i].ki_numthreads;
1317
1318                 pse.vmem_size = procs[i].ki_size;
1319                 pse.vmem_rss = procs[i].ki_rssize * getpagesize();
1320                 pse.stack_size = procs[i].ki_ssize * getpagesize();
1321                 pse.vmem_minflt = 0;
1322                 pse.vmem_minflt_counter = procs[i].ki_rusage.ru_minflt;
1323                 pse.vmem_majflt = 0;
1324                 pse.vmem_majflt_counter = procs[i].ki_rusage.ru_majflt;
1325
1326                 pse.cpu_user = 0;
1327                 pse.cpu_user_counter = procs[i].ki_rusage.ru_utime.tv_sec
1328                         * 1000
1329                         + procs[i].ki_rusage.ru_utime.tv_usec;
1330                 pse.cpu_system = 0;
1331                 pse.cpu_system_counter = procs[i].ki_rusage.ru_stime.tv_sec
1332                         * 1000
1333                         + procs[i].ki_rusage.ru_stime.tv_usec;
1334
1335                 switch (procs[i].ki_stat)
1336                 {
1337                         case SSTOP:     stopped++;      break;
1338                         case SSLEEP:    sleeping++;     break;
1339                         case SRUN:      running++;      break;
1340                         case SIDL:      idle++;         break;
1341                         case SWAIT:     wait++;         break;
1342                         case SLOCK:     blocked++;      break;
1343                         case SZOMB:     zombies++;      break;
1344                 }
1345
1346                 ps_list_add (procs[i].ki_comm, cmdline_ptr, &pse);
1347         }
1348
1349         kvm_close(kd);
1350
1351         ps_submit_state ("running",  running);
1352         ps_submit_state ("sleeping", sleeping);
1353         ps_submit_state ("zombies",  zombies);
1354         ps_submit_state ("stopped",  stopped);
1355         ps_submit_state ("blocked",  blocked);
1356         ps_submit_state ("idle",     idle);
1357         ps_submit_state ("wait",     wait);
1358
1359         for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
1360                 ps_submit_proc_list (ps_ptr);
1361 #endif /* HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD */
1362
1363         return (0);
1364 } /* int ps_read */
1365
1366 void module_register (void)
1367 {
1368         plugin_register_config ("processes", ps_config,
1369                         config_keys, config_keys_num);
1370         plugin_register_init ("processes", ps_init);
1371         plugin_register_read ("processes", ps_read);
1372 } /* void module_register */