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         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 528         sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
 529         sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
 530         sstrncpy (vl.type, "ps_state", sizeof (vl.type));
 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         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 546         sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
 547         sstrncpy (vl.plugin_instance, ps->name, sizeof (vl.plugin_instance));
 548
 549         sstrncpy (vl.type, "ps_rss", sizeof (vl.type));
 550         vl.values[0].gauge = ps->vmem_rss;
 551         vl.values_len = 1;
 552         plugin_dispatch_values (&vl);
 553
 554         sstrncpy (vl.type, "ps_cputime", sizeof (vl.type));
 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         sstrncpy (vl.type, "ps_count", sizeof (vl.type));
 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         sstrncpy (vl.type, "ps_pagefaults", sizeof (vl.type));
 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
 648         char *fields[64];
 649         char  fields_len;
 650
 651         int  *tasks;
 652         int   i;
 653
 654         int   ppid;
 655         int   name_len;
 656
 657         long long unsigned cpu_user_counter;
 658         long long unsigned cpu_system_counter;
 659         long long unsigned vmem_rss;
 660
 661         memset (ps, 0, sizeof (procstat_t));
 662
 663         ssnprintf (filename, sizeof (filename), "/proc/%i/stat", pid);
 664
 665         i = read_file_contents (filename, buffer, sizeof(buffer) - 1);
 666         if (i <= 0)
 667                 return (-1);
 668         buffer[i] = 0;
 669
 670         fields_len = strsplit (buffer, fields, 64);
 671         if (fields_len < 24)
 672         {
 673                 DEBUG ("processes plugin: ps_read_process (pid = %i):"
 674                                 " `%s' has only %i fields..",
 675                                 (int) pid, filename, fields_len);
 676                 return (-1);
 677         }
 678
 679         /* copy the name, strip brackets in the process */
 680         name_len = strlen (fields[1]) - 2;
 681         if ((fields[1][0] != '(') || (fields[1][name_len + 1] != ')'))
 682         {
 683                 DEBUG ("No brackets found in process name: `%s'", fields[1]);
 684                 return (-1);
 685         }
 686         fields[1] = fields[1] + 1;
 687         fields[1][name_len] = '\0';
 688         strncpy (ps->name, fields[1], PROCSTAT_NAME_LEN);
 689
 690         ppid = atoi (fields[3]);
 691
 692         *state = fields[2][0];
 693
 694         if (*state == 'Z')
 695         {
 696                 ps->num_lwp  = 0;
 697                 ps->num_proc = 0;
 698         }
 699         else if ((tasks = ps_read_tasks (pid)) == NULL)
 700         {
 701                 /* Kernel 2.4 or so */
 702                 ps->num_lwp  = 1;
 703                 ps->num_proc = 1;
 704         }
 705         else
 706         {
 707                 ps->num_lwp  = 0;
 708                 ps->num_proc = 1;
 709                 for (i = 0; tasks[i] != 0; i++)
 710                         ps->num_lwp++;
 711
 712                 free (tasks);
 713                 tasks = NULL;
 714         }
 715
 716         /* Leave the rest at zero if this is only a zombi */
 717         if (ps->num_proc == 0)
 718         {
 719                 DEBUG ("processes plugin: This is only a zombi: pid = %i; "
 720                                 "name = %s;", pid, ps->name);
 721                 return (0);
 722         }
 723
 724         cpu_user_counter   = atoll (fields[13]);
 725         cpu_system_counter = atoll (fields[14]);
 726         vmem_rss = atoll (fields[23]);
 727         ps->vmem_minflt_counter = atol (fields[9]);
 728         ps->vmem_majflt_counter = atol (fields[11]);
 729
 730         /* Convert jiffies to useconds */
 731         cpu_user_counter   = cpu_user_counter   * 1000000 / CONFIG_HZ;
 732         cpu_system_counter = cpu_system_counter * 1000000 / CONFIG_HZ;
 733         vmem_rss = vmem_rss * pagesize_g;
 734
 735         ps->cpu_user_counter = (unsigned long) cpu_user_counter;
 736         ps->cpu_system_counter = (unsigned long) cpu_system_counter;
 737         ps->vmem_rss = (unsigned long) vmem_rss;
 738
 739         /* success */
 740         return (0);
 741 } /* int ps_read_process (...) */
 742 #endif /* KERNEL_LINUX */
 743
 744 #if HAVE_THREAD_INFO
 745 static int mach_get_task_name (task_t t, int *pid, char *name, size_t name_max_len)
 746 {
 747         int mib[4];
 748
 749         struct kinfo_proc kp;
 750         size_t            kp_size;
 751
 752         mib[0] = CTL_KERN;
 753         mib[1] = KERN_PROC;
 754         mib[2] = KERN_PROC_PID;
 755
 756         if (pid_for_task (t, pid) != KERN_SUCCESS)
 757                 return (-1);
 758         mib[3] = *pid;
 759
 760         kp_size = sizeof (kp);
 761         if (sysctl (mib, 4, &kp, &kp_size, NULL, 0) != 0)
 762                 return (-1);
 763
 764         if (name_max_len > (MAXCOMLEN + 1))
 765                 name_max_len = MAXCOMLEN + 1;
 766
 767         strncpy (name, kp.kp_proc.p_comm, name_max_len - 1);
 768         name[name_max_len - 1] = '\0';
 769
 770         DEBUG ("pid = %i; name = %s;", *pid, name);
 771
 772         /* We don't do the special handling for `p_comm == "LaunchCFMApp"' as
 773          * `top' does it, because it is a lot of work and only used when
 774          * debugging. -octo */
 775
 776         return (0);
 777 }
 778 #endif /* HAVE_THREAD_INFO */
 779 /* ------- end of additional functions for KERNEL_LINUX/HAVE_THREAD_INFO ------- */
 780
 781 /* do actual readings from kernel */
 782 static int ps_read (void)
 783 {
 784 #if HAVE_THREAD_INFO
 785         kern_return_t            status;
 786
 787         int                      pset;
 788         processor_set_t          port_pset_priv;
 789
 790         int                      task;
 791         task_array_t             task_list;
 792         mach_msg_type_number_t   task_list_len;
 793
 794         int                      task_pid;
 795         char                     task_name[MAXCOMLEN + 1];
 796
 797         int                      thread;
 798         thread_act_array_t       thread_list;
 799         mach_msg_type_number_t   thread_list_len;
 800         thread_basic_info_data_t thread_data;
 801         mach_msg_type_number_t   thread_data_len;
 802
 803         int running  = 0;
 804         int sleeping = 0;
 805         int zombies  = 0;
 806         int stopped  = 0;
 807         int blocked  = 0;
 808
 809         procstat_t *ps;
 810         procstat_entry_t pse;
 811
 812         ps_list_reset ();
 813
 814         /*
 815          * The Mach-concept is a little different from the traditional UNIX
 816          * concept: All the work is done in threads. Threads are contained in
 817          * `tasks'. Therefore, `task status' doesn't make much sense, since
 818          * it's actually a `thread status'.
 819          * Tasks are assigned to sets of processors, so that's where you go to
 820          * get a list.
 821          */
 822         for (pset = 0; pset < pset_list_len; pset++)
 823         {
 824                 if ((status = host_processor_set_priv (port_host_self,
 825                                                 pset_list[pset],
 826                                                 &port_pset_priv)) != KERN_SUCCESS)
 827                 {
 828                         ERROR ("host_processor_set_priv failed: %s\n",
 829                                         mach_error_string (status));
 830                         continue;
 831                 }
 832
 833                 if ((status = processor_set_tasks (port_pset_priv,
 834                                                 &task_list,
 835                                                 &task_list_len)) != KERN_SUCCESS)
 836                 {
 837                         ERROR ("processor_set_tasks failed: %s\n",
 838                                         mach_error_string (status));
 839                         mach_port_deallocate (port_task_self, port_pset_priv);
 840                         continue;
 841                 }
 842
 843                 for (task = 0; task < task_list_len; task++)
 844                 {
 845                         ps = NULL;
 846                         if (mach_get_task_name (task_list[task],
 847                                                 &task_pid,
 848                                                 task_name, PROCSTAT_NAME_LEN) == 0)
 849                         {
 850                                 /* search for at least one match */
 851                                 for (ps = list_head_g; ps != NULL; ps = ps->next)
 852                                         /* FIXME: cmdline should be here instead of NULL */
 853                                         if (ps_list_match (task_name, NULL, ps) == 1)
 854                                                 break;
 855                         }
 856
 857                         /* Collect more detailed statistics for this process */
 858                         if (ps != NULL)
 859                         {
 860                                 task_basic_info_data_t        task_basic_info;
 861                                 mach_msg_type_number_t        task_basic_info_len;
 862                                 task_events_info_data_t       task_events_info;
 863                                 mach_msg_type_number_t        task_events_info_len;
 864                                 task_absolutetime_info_data_t task_absolutetime_info;
 865                                 mach_msg_type_number_t        task_absolutetime_info_len;
 866
 867                                 memset (&pse, '\0', sizeof (pse));
 868                                 pse.id = task_pid;
 869
 870                                 task_basic_info_len = TASK_BASIC_INFO_COUNT;
 871                                 status = task_info (task_list[task],
 872                                                 TASK_BASIC_INFO,
 873                                                 (task_info_t) &task_basic_info,
 874                                                 &task_basic_info_len);
 875                                 if (status != KERN_SUCCESS)
 876                                 {
 877                                         ERROR ("task_info failed: %s",
 878                                                         mach_error_string (status));
 879                                         continue; /* with next thread_list */
 880                                 }
 881
 882                                 task_events_info_len = TASK_EVENTS_INFO_COUNT;
 883                                 status = task_info (task_list[task],
 884                                                 TASK_EVENTS_INFO,
 885                                                 (task_info_t) &task_events_info,
 886                                                 &task_events_info_len);
 887                                 if (status != KERN_SUCCESS)
 888                                 {
 889                                         ERROR ("task_info failed: %s",
 890                                                         mach_error_string (status));
 891                                         continue; /* with next thread_list */
 892                                 }
 893
 894                                 task_absolutetime_info_len = TASK_ABSOLUTETIME_INFO_COUNT;
 895                                 status = task_info (task_list[task],
 896                                                 TASK_ABSOLUTETIME_INFO,
 897                                                 (task_info_t) &task_absolutetime_info,
 898                                                 &task_absolutetime_info_len);
 899                                 if (status != KERN_SUCCESS)
 900                                 {
 901                                         ERROR ("task_info failed: %s",
 902                                                         mach_error_string (status));
 903                                         continue; /* with next thread_list */
 904                                 }
 905
 906                                 pse.num_proc++;
 907                                 pse.vmem_rss = task_basic_info.resident_size;
 908
 909                                 pse.vmem_minflt_counter = task_events_info.cow_faults;
 910                                 pse.vmem_majflt_counter = task_events_info.faults;
 911
 912                                 pse.cpu_user_counter = task_absolutetime_info.total_user;
 913                                 pse.cpu_system_counter = task_absolutetime_info.total_system;
 914                         }
 915
 916                         status = task_threads (task_list[task], &thread_list,
 917                                         &thread_list_len);
 918                         if (status != KERN_SUCCESS)
 919                         {
 920                                 /* Apple's `top' treats this case a zombie. It
 921                                  * makes sense to some extend: A `zombie'
 922                                  * thread is nonsense, since the task/process
 923                                  * is dead. */
 924                                 zombies++;
 925                                 DEBUG ("task_threads failed: %s",
 926                                                 mach_error_string (status));
 927                                 if (task_list[task] != port_task_self)
 928                                         mach_port_deallocate (port_task_self,
 929                                                         task_list[task]);
 930                                 continue; /* with next task_list */
 931                         }
 932
 933                         for (thread = 0; thread < thread_list_len; thread++)
 934                         {
 935                                 thread_data_len = THREAD_BASIC_INFO_COUNT;
 936                                 status = thread_info (thread_list[thread],
 937                                                 THREAD_BASIC_INFO,
 938                                                 (thread_info_t) &thread_data,
 939                                                 &thread_data_len);
 940                                 if (status != KERN_SUCCESS)
 941                                 {
 942                                         ERROR ("thread_info failed: %s",
 943                                                         mach_error_string (status));
 944                                         if (task_list[task] != port_task_self)
 945                                                 mach_port_deallocate (port_task_self,
 946                                                                 thread_list[thread]);
 947                                         continue; /* with next thread_list */
 948                                 }
 949
 950                                 if (ps != NULL)
 951                                         pse.num_lwp++;
 952
 953                                 switch (thread_data.run_state)
 954                                 {
 955                                         case TH_STATE_RUNNING:
 956                                                 running++;
 957                                                 break;
 958                                         case TH_STATE_STOPPED:
 959                                         /* What exactly is `halted'? */
 960                                         case TH_STATE_HALTED:
 961                                                 stopped++;
 962                                                 break;
 963                                         case TH_STATE_WAITING:
 964                                                 sleeping++;
 965                                                 break;
 966                                         case TH_STATE_UNINTERRUPTIBLE:
 967                                                 blocked++;
 968                                                 break;
 969                                         /* There is no `zombie' case here,
 970                                          * since there are no zombie-threads.
 971                                          * There's only zombie tasks, which are
 972                                          * handled above. */
 973                                         default:
 974                                                 WARNING ("Unknown thread status: %s",
 975                                                                 thread_data.run_state);
 976                                                 break;
 977                                 } /* switch (thread_data.run_state) */
 978
 979                                 if (task_list[task] != port_task_self)
 980                                 {
 981                                         status = mach_port_deallocate (port_task_self,
 982                                                         thread_list[thread]);
 983                                         if (status != KERN_SUCCESS)
 984                                                 ERROR ("mach_port_deallocate failed: %s",
 985                                                                 mach_error_string (status));
 986                                 }
 987                         } /* for (thread_list) */
 988
 989                         if ((status = vm_deallocate (port_task_self,
 990                                                         (vm_address_t) thread_list,
 991                                                         thread_list_len * sizeof (thread_act_t)))
 992                                         != KERN_SUCCESS)
 993                         {
 994                                 ERROR ("vm_deallocate failed: %s",
 995                                                 mach_error_string (status));
 996                         }
 997                         thread_list = NULL;
 998                         thread_list_len = 0;
 999
1000                         /* Only deallocate the task port, if it isn't our own.
1001                          * Don't know what would happen in that case, but this
1002                          * is what Apple's top does.. ;) */
1003                         if (task_list[task] != port_task_self)
1004                         {
1005                                 status = mach_port_deallocate (port_task_self,
1006                                                 task_list[task]);
1007                                 if (status != KERN_SUCCESS)
1008                                         ERROR ("mach_port_deallocate failed: %s",
1009                                                         mach_error_string (status));
1010                         }
1011
1012                         if (ps != NULL)
1013                                 /* FIXME: cmdline should be here instead of NULL */
1014                                 ps_list_add (task_name, NULL, &pse);
1015                 } /* for (task_list) */
1016
1017                 if ((status = vm_deallocate (port_task_self,
1018                                 (vm_address_t) task_list,
1019                                 task_list_len * sizeof (task_t))) != KERN_SUCCESS)
1020                 {
1021                         ERROR ("vm_deallocate failed: %s",
1022                                         mach_error_string (status));
1023                 }
1024                 task_list = NULL;
1025                 task_list_len = 0;
1026
1027                 if ((status = mach_port_deallocate (port_task_self, port_pset_priv))
1028                                 != KERN_SUCCESS)
1029                 {
1030                         ERROR ("mach_port_deallocate failed: %s",
1031                                         mach_error_string (status));
1032                 }
1033         } /* for (pset_list) */
1034
1035         ps_submit_state ("running", running);
1036         ps_submit_state ("sleeping", sleeping);
1037         ps_submit_state ("zombies", zombies);
1038         ps_submit_state ("stopped", stopped);
1039         ps_submit_state ("blocked", blocked);
1040
1041         for (ps = list_head_g; ps != NULL; ps = ps->next)
1042                 ps_submit_proc_list (ps);
1043 /* #endif HAVE_THREAD_INFO */
1044
1045 #elif KERNEL_LINUX
1046         int running  = 0;
1047         int sleeping = 0;
1048         int zombies  = 0;
1049         int stopped  = 0;
1050         int paging   = 0;
1051         int blocked  = 0;
1052
1053         struct dirent *ent;
1054         DIR           *proc;
1055         int            pid;
1056
1057         int        status;
1058         procstat_t ps;
1059         procstat_entry_t pse;
1060         char       state;
1061
1062         procstat_t *ps_ptr;
1063
1064         running = sleeping = zombies = stopped = paging = blocked = 0;
1065         ps_list_reset ();
1066
1067         if ((proc = opendir ("/proc")) == NULL)
1068         {
1069                 char errbuf[1024];
1070                 ERROR ("Cannot open `/proc': %s",
1071                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1072                 return (-1);
1073         }
1074
1075         while ((ent = readdir (proc)) != NULL)
1076         {
1077                 if (!isdigit (ent->d_name[0]))
1078                         continue;
1079
1080                 if ((pid = atoi (ent->d_name)) < 1)
1081                         continue;
1082
1083                 status = ps_read_process (pid, &ps, &state);
1084                 if (status != 0)
1085                 {
1086                         DEBUG ("ps_read_process failed: %i", status);
1087                         continue;
1088                 }
1089
1090                 pse.id       = pid;
1091                 pse.age      = 0;
1092
1093                 pse.num_proc = ps.num_proc;
1094                 pse.num_lwp  = ps.num_lwp;
1095                 pse.vmem_rss = ps.vmem_rss;
1096
1097                 pse.vmem_minflt = 0;
1098                 pse.vmem_minflt_counter = ps.vmem_minflt_counter;
1099                 pse.vmem_majflt = 0;
1100                 pse.vmem_majflt_counter = ps.vmem_majflt_counter;
1101
1102                 pse.cpu_user = 0;
1103                 pse.cpu_user_counter = ps.cpu_user_counter;
1104                 pse.cpu_system = 0;
1105                 pse.cpu_system_counter = ps.cpu_system_counter;
1106
1107                 switch (state)
1108                 {
1109                         case 'R': running++;  break;
1110                         case 'S': sleeping++; break;
1111                         case 'D': blocked++;  break;
1112                         case 'Z': zombies++;  break;
1113                         case 'T': stopped++;  break;
1114                         case 'W': paging++;   break;
1115                 }
1116
1117                 /* FIXME: cmdline should be here instead of NULL */
1118                 ps_list_add (ps.name, NULL, &pse);
1119         }
1120
1121         closedir (proc);
1122
1123         ps_submit_state ("running",  running);
1124         ps_submit_state ("sleeping", sleeping);
1125         ps_submit_state ("zombies",  zombies);
1126         ps_submit_state ("stopped",  stopped);
1127         ps_submit_state ("paging",   paging);
1128         ps_submit_state ("blocked",  blocked);
1129
1130         for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
1131                 ps_submit_proc_list (ps_ptr);
1132 /* #endif KERNEL_LINUX */
1133
1134 #elif HAVE_LIBKVM
1135         int running  = 0;
1136         int sleeping = 0;
1137         int zombies  = 0;
1138         int stopped  = 0;
1139         int blocked  = 0;
1140         int idle     = 0;
1141         int wait     = 0;
1142
1143         kvm_t *kd;
1144         char errbuf[1024];
1145         char cmdline[ARG_MAX];
1146         char *cmdline_ptr;
1147         struct kinfo_proc *procs;          /* array of processes */
1148         char **argv;
1149         int count;                         /* returns number of processes */
1150         int i;
1151
1152         procstat_t *ps_ptr;
1153         procstat_entry_t pse;
1154
1155         ps_list_reset ();
1156
1157         /* Open the kvm interface, get a descriptor */
1158         kd = kvm_open (NULL, NULL, NULL, 0, errbuf);
1159         if (kd == NULL)
1160         {
1161                 ERROR ("processes plugin: Cannot open kvm interface: %s",
1162                                 errbuf);
1163                 return (0);
1164         }
1165
1166         /* Get the list of processes. */
1167         procs = kvm_getprocs(kd, KERN_PROC_ALL, 0, &count);
1168         if (procs == NULL)
1169         {
1170                 kvm_close (kd);
1171                 ERROR ("processes plugin: Cannot get kvm processes list: %s",
1172                                 kvm_geterr(kd));
1173                 return (0);
1174         }
1175
1176         /* Iterate through the processes in kinfo_proc */
1177         for (i = 0; i < count; i++)
1178         {
1179                 /* retrieve the arguments */
1180                 cmdline[0] = 0;
1181                 cmdline_ptr = NULL;
1182
1183                 argv = kvm_getargv (kd, (const struct kinfo_proc *) &(procs[i]), 0);
1184                 if (argv != NULL)
1185                 {
1186                         int status;
1187                         int argc;
1188
1189                         argc = 0;
1190                         while (argv[argc] != NULL)
1191                                 argc++;
1192
1193                         status = strjoin (cmdline, sizeof (cmdline),
1194                                         argv, argc, " ");
1195
1196                         if (status < 0)
1197                         {
1198                                 WARNING ("processes plugin: Command line did "
1199                                                 "not fit into buffer.");
1200                         }
1201                         else
1202                         {
1203                                 cmdline_ptr = &cmdline[0];
1204                         }
1205                 }
1206
1207                 pse.id       = procs[i].ki_pid;
1208                 pse.age      = 0;
1209
1210                 pse.num_proc = 1;
1211                 pse.num_lwp  = procs[i].ki_numthreads;
1212
1213                 pse.vmem_rss = procs[i].ki_rssize * getpagesize();
1214                 pse.vmem_minflt = 0;
1215                 pse.vmem_minflt_counter = procs[i].ki_rusage.ru_minflt;
1216                 pse.vmem_majflt = 0;
1217                 pse.vmem_majflt_counter = procs[i].ki_rusage.ru_majflt;
1218
1219                 pse.cpu_user = 0;
1220                 pse.cpu_user_counter = procs[i].ki_rusage.ru_utime.tv_sec
1221                         * 1000
1222                         + procs[i].ki_rusage.ru_utime.tv_usec;
1223                 pse.cpu_system = 0;
1224                 pse.cpu_system_counter = procs[i].ki_rusage.ru_stime.tv_sec
1225                         * 1000
1226                         + procs[i].ki_rusage.ru_stime.tv_usec;
1227
1228                 switch (procs[i].ki_stat)
1229                 {
1230                         case SSTOP:     stopped++;      break;
1231                         case SSLEEP:    sleeping++;     break;
1232                         case SRUN:      running++;      break;
1233                         case SIDL:      idle++;         break;
1234                         case SWAIT:     wait++;         break;
1235                         case SLOCK:     blocked++;      break;
1236                         case SZOMB:     zombies++;      break;
1237                 }
1238
1239                 ps_list_add (procs[i].ki_comm, cmdline_ptr, &pse);
1240         }
1241
1242         kvm_close(kd);
1243
1244         ps_submit_state ("running",  running);
1245         ps_submit_state ("sleeping", sleeping);
1246         ps_submit_state ("zombies",  zombies);
1247         ps_submit_state ("stopped",  stopped);
1248         ps_submit_state ("blocked",  blocked);
1249         ps_submit_state ("idle",     idle);
1250         ps_submit_state ("wait",     wait);
1251
1252         for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
1253                 ps_submit_proc_list (ps_ptr);
1254 #endif /* HAVE_LIBKVM */
1255
1256         return (0);
1257 } /* int ps_read */
1258
1259 void module_register (void)
1260 {
1261         plugin_register_config ("processes", ps_config,
1262                         config_keys, config_keys_num);
1263         plugin_register_init ("processes", ps_init);
1264         plugin_register_read ("processes", ps_read);
1265 } /* void module_register */