src/processes.c

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