granicus.if.org Git - sysstat/blob - rd_stats.c

   1 /*
   2  * rd_stats.c: Read system statistics
   3  * (C) 1999-2011 by Sebastien GODARD (sysstat <at> orange.fr)
   4  *
   5  ***************************************************************************
   6  * This program is free software; you can redistribute it and/or modify it *
   7  * under the terms of the GNU General Public License as published  by  the *
   8  * Free Software Foundation; either version 2 of the License, or (at  your *
   9  * option) any later version.                                              *
  10  *                                                                         *
  11  * This program is distributed in the hope that it  will  be  useful,  but *
  12  * WITHOUT ANY WARRANTY; without the implied warranty  of  MERCHANTABILITY *
  13  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
  14  * for more details.                                                       *
  15  *                                                                         *
  16  * You should have received a copy of the GNU General Public License along *
  17  * with this program; if not, write to the Free Software Foundation, Inc., *
  18  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA                   *
  19  ***************************************************************************
  20  */
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25 #include <errno.h>
  26 #include <dirent.h>
  27 #include <ctype.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31
  32 #include "common.h"
  33 #include "rd_stats.h"
  34 #include "ioconf.h"
  35
  36 #ifdef USE_NLS
  37 #include <locale.h>
  38 #include <libintl.h>
  39 #define _(string) gettext(string)
  40 #else
  41 #define _(string) (string)
  42 #endif
  43
  44 /*
  45  ***************************************************************************
  46  * Read CPU statistics and machine uptime.
  47  *
  48  * IN:
  49  * @st_cpu      Structure where stats will be saved.
  50  * @nbr         Total number of CPU (including cpu "all").
  51  *
  52  * OUT:
  53  * @st_cpu      Structure with statistics.
  54  * @uptime      Machine uptime multiplied by the number of processors.
  55  * @uptime0     Machine uptime. Filled only if previously set to zero.
  56  ***************************************************************************
  57  */
  58 void read_stat_cpu(struct stats_cpu *st_cpu, int nbr,
  59                    unsigned long long *uptime, unsigned long long *uptime0)
  60 {
  61         FILE *fp;
  62         struct stats_cpu *st_cpu_i;
  63         struct stats_cpu sc;
  64         char line[8192];
  65         int proc_nb;
  66
  67         if ((fp = fopen(STAT, "r")) == NULL) {
  68                 fprintf(stderr, _("Cannot open %s: %s\n"), STAT, strerror(errno));
  69                 exit(2);
  70         }
  71
  72         while (fgets(line, 8192, fp) != NULL) {
  73
  74                 if (!strncmp(line, "cpu ", 4)) {
  75
  76                         /*
  77                          * All the fields don't necessarily exist,
  78                          * depending on the kernel version used.
  79                          */
  80                         memset(st_cpu, 0, STATS_CPU_SIZE);
  81
  82                         /*
  83                          * Read the number of jiffies spent in the different modes
  84                          * (user, nice, etc.) among all proc. CPU usage is not reduced
  85                          * to one processor to avoid rounding problems.
  86                          */
  87                         sscanf(line + 5, "%llu %llu %llu %llu %llu %llu %llu %llu %llu",
  88                                &st_cpu->cpu_user,
  89                                &st_cpu->cpu_nice,
  90                                &st_cpu->cpu_sys,
  91                                &st_cpu->cpu_idle,
  92                                &st_cpu->cpu_iowait,
  93                                &st_cpu->cpu_hardirq,
  94                                &st_cpu->cpu_softirq,
  95                                &st_cpu->cpu_steal,
  96                                &st_cpu->cpu_guest);
  97
  98                         /*
  99                          * Compute the uptime of the system in jiffies (1/100ths of a second
 100                          * if HZ=100).
 101                          * Machine uptime is multiplied by the number of processors here.
 102                          *
 103                          * NB: Don't add cpu_guest because cpu_user already includes it.
 104                          */
 105                         *uptime = st_cpu->cpu_user + st_cpu->cpu_nice    +
 106                                 st_cpu->cpu_sys    + st_cpu->cpu_idle    +
 107                                 st_cpu->cpu_iowait + st_cpu->cpu_hardirq +
 108                                 st_cpu->cpu_steal  + st_cpu->cpu_softirq;
 109                 }
 110
 111                 else if (!strncmp(line, "cpu", 3)) {
 112                         if (nbr > 1) {
 113                                 /* All the fields don't necessarily exist */
 114                                 memset(&sc, 0, STATS_CPU_SIZE);
 115                                 /*
 116                                  * Read the number of jiffies spent in the different modes
 117                                  * (user, nice, etc) for current proc.
 118                                  * This is done only on SMP machines.
 119                                  */
 120                                 sscanf(line + 3, "%d %llu %llu %llu %llu %llu %llu %llu %llu %llu",
 121                                        &proc_nb,
 122                                        &sc.cpu_user,
 123                                        &sc.cpu_nice,
 124                                        &sc.cpu_sys,
 125                                        &sc.cpu_idle,
 126                                        &sc.cpu_iowait,
 127                                        &sc.cpu_hardirq,
 128                                        &sc.cpu_softirq,
 129                                        &sc.cpu_steal,
 130                                        &sc.cpu_guest);
 131
 132                                 if (proc_nb < (nbr - 1)) {
 133                                         st_cpu_i = st_cpu + proc_nb + 1;
 134                                         *st_cpu_i = sc;
 135                                 }
 136                                 /*
 137                                  * else additional CPUs have been dynamically registered
 138                                  * in /proc/stat.
 139                                  */
 140
 141                                 if (!proc_nb && !*uptime0) {
 142                                         /*
 143                                          * Compute uptime reduced to one proc using proc#0.
 144                                          * Done if /proc/uptime was unavailable.
 145                                          *
 146                                          * NB: Don't add cpu_guest because cpu_user already
 147                                          * includes it.
 148                                          */
 149                                         *uptime0 = sc.cpu_user + sc.cpu_nice  +
 150                                                 sc.cpu_sys     + sc.cpu_idle  +
 151                                                 sc.cpu_iowait  + sc.cpu_steal +
 152                                                 sc.cpu_hardirq + sc.cpu_softirq;
 153                                 }
 154                         }
 155                 }
 156         }
 157
 158         fclose(fp);
 159 }
 160
 161 /*
 162  ***************************************************************************
 163  * Read processes (tasks) creation and context switches statistics
 164  * from /proc/stat.
 165  *
 166  * IN:
 167  * @st_pcsw     Structure where stats will be saved.
 168  *
 169  * OUT:
 170  * @st_pcsw     Structure with statistics.
 171  ***************************************************************************
 172  */
 173 void read_stat_pcsw(struct stats_pcsw *st_pcsw)
 174 {
 175         FILE *fp;
 176         char line[8192];
 177
 178         if ((fp = fopen(STAT, "r")) == NULL)
 179                 return;
 180
 181         while (fgets(line, 8192, fp) != NULL) {
 182
 183                 if (!strncmp(line, "ctxt ", 5)) {
 184                         /* Read number of context switches */
 185                         sscanf(line + 5, "%llu", &st_pcsw->context_switch);
 186                 }
 187
 188                 else if (!strncmp(line, "processes ", 10)) {
 189                         /* Read number of processes created since system boot */
 190                         sscanf(line + 10, "%lu", &st_pcsw->processes);
 191                 }
 192         }
 193
 194         fclose(fp);
 195 }
 196
 197 /*
 198  ***************************************************************************
 199  * Read interrupts statistics from /proc/stat.
 200  *
 201  * IN:
 202  * @st_irq      Structure where stats will be saved.
 203  * @nbr         Number of interrupts to read, including the total number
 204  *              of interrupts.
 205  *
 206  * OUT:
 207  * @st_irq      Structure with statistics.
 208  ***************************************************************************
 209  */
 210 void read_stat_irq(struct stats_irq *st_irq, int nbr)
 211 {
 212         FILE *fp;
 213         struct stats_irq *st_irq_i;
 214         char line[8192];
 215         int i, pos;
 216
 217         if ((fp = fopen(STAT, "r")) == NULL)
 218                 return;
 219
 220         while (fgets(line, 8192, fp) != NULL) {
 221
 222                 if (!strncmp(line, "intr ", 5)) {
 223                         /* Read total number of interrupts received since system boot */
 224                         sscanf(line + 5, "%llu", &st_irq->irq_nr);
 225                         pos = strcspn(line + 5, " ") + 5;
 226
 227                         for (i = 1; i < nbr; i++) {
 228                                 st_irq_i = st_irq + i;
 229                                 sscanf(line + pos, " %llu", &st_irq_i->irq_nr);
 230                                 pos += strcspn(line + pos + 1, " ") + 1;
 231                         }
 232                 }
 233         }
 234
 235         fclose(fp);
 236 }
 237
 238 /*
 239  ***************************************************************************
 240  * Read queue and load statistics from /proc/loadavg and /proc/stat.
 241  *
 242  * IN:
 243  * @st_queue    Structure where stats will be saved.
 244  *
 245  * OUT:
 246  * @st_queue    Structure with statistics.
 247  ***************************************************************************
 248  */
 249 void read_loadavg(struct stats_queue *st_queue)
 250 {
 251         FILE *fp;
 252         char line[8192];
 253         int load_tmp[3];
 254
 255         if ((fp = fopen(LOADAVG, "r")) == NULL)
 256                 return;
 257
 258         /* Read load averages and queue length */
 259         fscanf(fp, "%d.%d %d.%d %d.%d %ld/%d %*d\n",
 260                &load_tmp[0], &st_queue->load_avg_1,
 261                &load_tmp[1], &st_queue->load_avg_5,
 262                &load_tmp[2], &st_queue->load_avg_15,
 263                &st_queue->nr_running,
 264                &st_queue->nr_threads);
 265
 266         fclose(fp);
 267
 268         st_queue->load_avg_1  += load_tmp[0] * 100;
 269         st_queue->load_avg_5  += load_tmp[1] * 100;
 270         st_queue->load_avg_15 += load_tmp[2] * 100;
 271
 272         if (st_queue->nr_running) {
 273                 /* Do not take current process into account */
 274                 st_queue->nr_running--;
 275         }
 276
 277         /* Read nr of tasks blocked from /proc/stat */
 278         if ((fp = fopen(STAT, "r")) == NULL)
 279                 return;
 280
 281         while (fgets(line, 8192, fp) != NULL) {
 282
 283                 if (!strncmp(line, "procs_blocked ", 14)) {
 284                         /* Read number of processes blocked */
 285                         sscanf(line + 14, "%lu", &st_queue->procs_blocked);
 286                         break;
 287                 }
 288         }
 289
 290         fclose(fp);
 291 }
 292
 293 /*
 294  ***************************************************************************
 295  * Read memory statistics from /proc/meminfo.
 296  *
 297  * IN:
 298  * @st_memory   Structure where stats will be saved.
 299  *
 300  * OUT:
 301  * @st_memory   Structure with statistics.
 302  ***************************************************************************
 303  */
 304 void read_meminfo(struct stats_memory *st_memory)
 305 {
 306         FILE *fp;
 307         char line[128];
 308
 309         if ((fp = fopen(MEMINFO, "r")) == NULL)
 310                 return;
 311
 312         while (fgets(line, 128, fp) != NULL) {
 313
 314                 if (!strncmp(line, "MemTotal:", 9)) {
 315                         /* Read the total amount of memory in kB */
 316                         sscanf(line + 9, "%lu", &st_memory->tlmkb);
 317                 }
 318                 else if (!strncmp(line, "MemFree:", 8)) {
 319                         /* Read the amount of free memory in kB */
 320                         sscanf(line + 8, "%lu", &st_memory->frmkb);
 321                 }
 322                 else if (!strncmp(line, "Buffers:", 8)) {
 323                         /* Read the amount of buffered memory in kB */
 324                         sscanf(line + 8, "%lu", &st_memory->bufkb);
 325                 }
 326                 else if (!strncmp(line, "Cached:", 7)) {
 327                         /* Read the amount of cached memory in kB */
 328                         sscanf(line + 7, "%lu", &st_memory->camkb);
 329                 }
 330                 else if (!strncmp(line, "SwapCached:", 11)) {
 331                         /* Read the amount of cached swap in kB */
 332                         sscanf(line + 11, "%lu", &st_memory->caskb);
 333                 }
 334                 else if (!strncmp(line, "Active:", 7)) {
 335                         /* Read the amount of active memory in kB */
 336                         sscanf(line + 7, "%lu", &st_memory->activekb);
 337                 }
 338                 else if (!strncmp(line, "Inactive:", 9)) {
 339                         /* Read the amount of inactive memory in kB */
 340                         sscanf(line + 9, "%lu", &st_memory->inactkb);
 341                 }
 342                 else if (!strncmp(line, "SwapTotal:", 10)) {
 343                         /* Read the total amount of swap memory in kB */
 344                         sscanf(line + 10, "%lu", &st_memory->tlskb);
 345                 }
 346                 else if (!strncmp(line, "SwapFree:", 9)) {
 347                         /* Read the amount of free swap memory in kB */
 348                         sscanf(line + 9, "%lu", &st_memory->frskb);
 349                 }
 350                 else if (!strncmp(line, "Committed_AS:", 13)) {
 351                         /* Read the amount of commited memory in kB */
 352                         sscanf(line + 13, "%lu", &st_memory->comkb);
 353                 }
 354         }
 355
 356         fclose(fp);
 357 }
 358
 359 /*
 360  ***************************************************************************
 361  * Read swapping statistics from /proc/vmstat.
 362  *
 363  * IN:
 364  * @st_swap     Structure where stats will be saved.
 365  *
 366  * OUT:
 367  * @st_swap     Structure with statistics.
 368  ***************************************************************************
 369  */
 370 void read_vmstat_swap(struct stats_swap *st_swap)
 371 {
 372         FILE *fp;
 373         char line[128];
 374
 375         if ((fp = fopen(VMSTAT, "r")) == NULL)
 376                 return;
 377
 378         while (fgets(line, 128, fp) != NULL) {
 379
 380                 if (!strncmp(line, "pswpin ", 7)) {
 381                         /* Read number of swap pages brought in */
 382                         sscanf(line + 7, "%lu", &st_swap->pswpin);
 383                 }
 384                 else if (!strncmp(line, "pswpout ", 8)) {
 385                         /* Read number of swap pages brought out */
 386                         sscanf(line + 8, "%lu", &st_swap->pswpout);
 387                 }
 388         }
 389
 390         fclose(fp);
 391 }
 392
 393 /*
 394  ***************************************************************************
 395  * Read paging statistics from /proc/vmstat.
 396  *
 397  * IN:
 398  * @st_paging   Structure where stats will be saved.
 399  *
 400  * OUT:
 401  * @st_paging   Structure with statistics.
 402  ***************************************************************************
 403  */
 404 void read_vmstat_paging(struct stats_paging *st_paging)
 405 {
 406         FILE *fp;
 407         char line[128];
 408         unsigned long pgtmp;
 409
 410         if ((fp = fopen(VMSTAT, "r")) == NULL)
 411                 return;
 412
 413         st_paging->pgsteal = 0;
 414         st_paging->pgscan_kswapd = st_paging->pgscan_direct = 0;
 415
 416         while (fgets(line, 128, fp) != NULL) {
 417
 418                 if (!strncmp(line, "pgpgin ", 7)) {
 419                         /* Read number of pages the system paged in */
 420                         sscanf(line + 7, "%lu", &st_paging->pgpgin);
 421                 }
 422                 else if (!strncmp(line, "pgpgout ", 8)) {
 423                         /* Read number of pages the system paged out */
 424                         sscanf(line + 8, "%lu", &st_paging->pgpgout);
 425                 }
 426                 else if (!strncmp(line, "pgfault ", 8)) {
 427                         /* Read number of faults (major+minor) made by the system */
 428                         sscanf(line + 8, "%lu", &st_paging->pgfault);
 429                 }
 430                 else if (!strncmp(line, "pgmajfault ", 11)) {
 431                         /* Read number of faults (major only) made by the system */
 432                         sscanf(line + 11, "%lu", &st_paging->pgmajfault);
 433                 }
 434                 else if (!strncmp(line, "pgfree ", 7)) {
 435                         /* Read number of pages freed by the system */
 436                         sscanf(line + 7, "%lu", &st_paging->pgfree);
 437                 }
 438                 else if (!strncmp(line, "pgsteal_", 8)) {
 439                         /* Read number of pages stolen by the system */
 440                         sscanf(strchr(line, ' '), "%lu", &pgtmp);
 441                         st_paging->pgsteal += pgtmp;
 442                 }
 443                 else if (!strncmp(line, "pgscan_kswapd_", 14)) {
 444                         /* Read number of pages scanned by the kswapd daemon */
 445                         sscanf(strchr(line, ' '), "%lu", &pgtmp);
 446                         st_paging->pgscan_kswapd += pgtmp;
 447                 }
 448                 else if (!strncmp(line, "pgscan_direct_", 14)) {
 449                         /* Read number of pages scanned directly */
 450                         sscanf(strchr(line, ' '), "%lu", &pgtmp);
 451                         st_paging->pgscan_direct += pgtmp;
 452                 }
 453         }
 454
 455         fclose(fp);
 456 }
 457
 458 /*
 459  ***************************************************************************
 460  * Read I/O and transfer rates statistics from /proc/diskstats.
 461  *
 462  * IN:
 463  * @st_io       Structure where stats will be saved.
 464  *
 465  * OUT:
 466  * @st_io       Structure with statistics.
 467  ***************************************************************************
 468  */
 469 void read_diskstats_io(struct stats_io *st_io)
 470 {
 471         FILE *fp;
 472         char line[256];
 473         char dev_name[MAX_NAME_LEN];
 474         unsigned int major, minor;
 475         unsigned long rd_ios, wr_ios;
 476         unsigned long long rd_sec, wr_sec;
 477
 478         if ((fp = fopen(DISKSTATS, "r")) == NULL)
 479                 return;
 480
 481         while (fgets(line, 256, fp) != NULL) {
 482
 483                 if (sscanf(line, "%u %u %s %lu %*u %llu %*u %lu %*u %llu",
 484                            &major, &minor, dev_name,
 485                            &rd_ios, &rd_sec, &wr_ios, &wr_sec) == 7) {
 486
 487                         if (is_device(dev_name)) {
 488                                 /*
 489                                  * OK: It's a device and not a partition.
 490                                  * Note: Structure should have been initialized first!
 491                                  */
 492                                 st_io->dk_drive      += rd_ios + wr_ios;
 493                                 st_io->dk_drive_rio  += rd_ios;
 494                                 st_io->dk_drive_rblk += (unsigned int) rd_sec;
 495                                 st_io->dk_drive_wio  += wr_ios;
 496                                 st_io->dk_drive_wblk += (unsigned int) wr_sec;
 497                         }
 498                 }
 499         }
 500
 501         fclose(fp);
 502 }
 503
 504 /*
 505  ***************************************************************************
 506  * Read block devices statistics from /proc/diskstats.
 507  *
 508  * IN:
 509  * @st_disk     Structure where stats will be saved.
 510  * @nbr         Maximum number of block devices.
 511  * @read_part   True if disks *and* partitions should be read; False if only
 512  *              disks are read.
 513  *
 514  * OUT:
 515  * @st_disk     Structure with statistics.
 516  ***************************************************************************
 517  */
 518 void read_diskstats_disk(struct stats_disk *st_disk, int nbr, int read_part)
 519 {
 520         FILE *fp;
 521         char line[256];
 522         char dev_name[MAX_NAME_LEN];
 523         int dsk = 0;
 524         struct stats_disk *st_disk_i;
 525         unsigned int major, minor;
 526         unsigned long rd_ios, wr_ios, rd_ticks, wr_ticks;
 527         unsigned long tot_ticks, rq_ticks;
 528         unsigned long long rd_sec, wr_sec;
 529
 530         if ((fp = fopen(DISKSTATS, "r")) == NULL)
 531                 return;
 532
 533         while ((fgets(line, 256, fp) != NULL) && (dsk < nbr)) {
 534
 535                 if (sscanf(line, "%u %u %s %lu %*u %llu %lu %lu %*u %llu"
 536                            " %lu %*u %lu %lu",
 537                            &major, &minor, dev_name,
 538                            &rd_ios, &rd_sec, &rd_ticks, &wr_ios, &wr_sec, &wr_ticks,
 539                            &tot_ticks, &rq_ticks) == 11) {
 540
 541                         if (!rd_ios && !wr_ios)
 542                                 /* Unused device: Ignore it */
 543                                 continue;
 544                         if (read_part || is_device(dev_name)) {
 545                                 st_disk_i = st_disk + dsk++;
 546                                 st_disk_i->major     = major;
 547                                 st_disk_i->minor     = minor;
 548                                 st_disk_i->nr_ios    = rd_ios + wr_ios;
 549                                 st_disk_i->rd_sect   = rd_sec;
 550                                 st_disk_i->wr_sect   = wr_sec;
 551                                 st_disk_i->rd_ticks  = rd_ticks;
 552                                 st_disk_i->wr_ticks  = wr_ticks;
 553                                 st_disk_i->tot_ticks = tot_ticks;
 554                                 st_disk_i->rq_ticks  = rq_ticks;
 555                         }
 556                 }
 557         }
 558
 559         fclose(fp);
 560 }
 561
 562 /*
 563  ***************************************************************************
 564  * Read serial lines statistics from /proc/tty/driver/serial.
 565  *
 566  * IN:
 567  * @st_serial   Structure where stats will be saved.
 568  * @nbr         Maximum number of serial lines.
 569  *
 570  * OUT:
 571  * @st_serial   Structure with statistics.
 572  ***************************************************************************
 573  */
 574 void read_tty_driver_serial(struct stats_serial *st_serial, int nbr)
 575 {
 576         FILE *fp;
 577         struct stats_serial *st_serial_i;
 578         int sl = 0;
 579         char line[256];
 580         char *p;
 581
 582         if ((fp = fopen(SERIAL, "r")) == NULL)
 583                 return;
 584
 585         while ((fgets(line, 256, fp) != NULL) && (sl < nbr)) {
 586
 587                 if ((p = strstr(line, "tx:")) != NULL) {
 588                         st_serial_i = st_serial + sl;
 589                         sscanf(line, "%u", &st_serial_i->line);
 590                         /*
 591                          * A value of 0 means an unused structure.
 592                          * So increment it to make sure it is not null.
 593                          */
 594                         (st_serial_i->line)++;
 595                         /*
 596                          * Read the number of chars transmitted and received by
 597                          * current serial line.
 598                          */
 599                         sscanf(p + 3, "%u", &st_serial_i->tx);
 600                         if ((p = strstr(line, "rx:")) != NULL) {
 601                                 sscanf(p + 3, "%u", &st_serial_i->rx);
 602                         }
 603                         if ((p = strstr(line, "fe:")) != NULL) {
 604                                 sscanf(p + 3, "%u", &st_serial_i->frame);
 605                         }
 606                         if ((p = strstr(line, "pe:")) != NULL) {
 607                                 sscanf(p + 3, "%u", &st_serial_i->parity);
 608                         }
 609                         if ((p = strstr(line, "brk:")) != NULL) {
 610                                 sscanf(p + 4, "%u", &st_serial_i->brk);
 611                         }
 612                         if ((p = strstr(line, "oe:")) != NULL) {
 613                                 sscanf(p + 3, "%u", &st_serial_i->overrun);
 614                         }
 615
 616                         sl++;
 617                 }
 618         }
 619
 620         fclose(fp);
 621 }
 622
 623 /*
 624  ***************************************************************************
 625  * Read kernel tables statistics from various system files.
 626  *
 627  * IN:
 628  * @st_ktables  Structure where stats will be saved.
 629  *
 630  * OUT:
 631  * @st_ktables  Structure with statistics.
 632  ***************************************************************************
 633  */
 634 void read_kernel_tables(struct stats_ktables *st_ktables)
 635 {
 636         FILE *fp;
 637         unsigned int parm;
 638
 639         /* Open /proc/sys/fs/dentry-state file */
 640         if ((fp = fopen(FDENTRY_STATE, "r")) != NULL) {
 641                 fscanf(fp, "%*d %u",
 642                        &st_ktables->dentry_stat);
 643                 fclose(fp);
 644         }
 645
 646         /* Open /proc/sys/fs/file-nr file */
 647         if ((fp = fopen(FFILE_NR, "r")) != NULL) {
 648                 fscanf(fp, "%u %u",
 649                        &st_ktables->file_used, &parm);
 650                 fclose(fp);
 651                 /*
 652                  * The number of used handles is the number of allocated ones
 653                  * minus the number of free ones.
 654                  */
 655                 st_ktables->file_used -= parm;
 656         }
 657
 658         /* Open /proc/sys/fs/inode-state file */
 659         if ((fp = fopen(FINODE_STATE, "r")) != NULL) {
 660                 fscanf(fp, "%u %u",
 661                        &st_ktables->inode_used, &parm);
 662                 fclose(fp);
 663                 /*
 664                  * The number of inuse inodes is the number of allocated ones
 665                  * minus the number of free ones.
 666                  */
 667                 st_ktables->inode_used -= parm;
 668         }
 669
 670         /* Open /proc/sys/kernel/pty/nr file */
 671         if ((fp = fopen(PTY_NR, "r")) != NULL) {
 672                 fscanf(fp, "%u",
 673                        &st_ktables->pty_nr);
 674                 fclose(fp);
 675         }
 676 }
 677
 678 /*
 679  ***************************************************************************
 680  * Read network interfaces statistics from /proc/net/dev.
 681  *
 682  * IN:
 683  * @st_net_dev  Structure where stats will be saved.
 684  * @nbr         Maximum number of network interfaces.
 685  *
 686  * OUT:
 687  * @st_net_dev  Structure with statistics.
 688  ***************************************************************************
 689  */
 690 void read_net_dev(struct stats_net_dev *st_net_dev, int nbr)
 691 {
 692         FILE *fp;
 693         struct stats_net_dev *st_net_dev_i;
 694         char line[256];
 695         char iface[MAX_IFACE_LEN];
 696         int dev = 0;
 697         int pos;
 698
 699         if ((fp = fopen(NET_DEV, "r")) == NULL)
 700                 return;
 701
 702         while ((fgets(line, 256, fp) != NULL) && (dev < nbr)) {
 703
 704                 pos = strcspn(line, ":");
 705                 if (pos < strlen(line)) {
 706                         st_net_dev_i = st_net_dev + dev;
 707                         strncpy(iface, line, MINIMUM(pos, MAX_IFACE_LEN - 1));
 708                         iface[MINIMUM(pos, MAX_IFACE_LEN - 1)] = '\0';
 709                         sscanf(iface, "%s", st_net_dev_i->interface); /* Skip heading spaces */
 710                         sscanf(line + pos + 1, "%lu %lu %*u %*u %*u %*u %lu %lu %lu %lu "
 711                                "%*u %*u %*u %*u %*u %lu",
 712                                &st_net_dev_i->rx_bytes,
 713                                &st_net_dev_i->rx_packets,
 714                                &st_net_dev_i->rx_compressed,
 715                                &st_net_dev_i->multicast,
 716                                &st_net_dev_i->tx_bytes,
 717                                &st_net_dev_i->tx_packets,
 718                                &st_net_dev_i->tx_compressed);
 719                         dev++;
 720                 }
 721         }
 722
 723         fclose(fp);
 724 }
 725
 726 /*
 727  ***************************************************************************
 728  * Read network interfaces errors statistics from /proc/net/dev.
 729  *
 730  * IN:
 731  * @st_net_edev Structure where stats will be saved.
 732  * @nbr         Maximum number of network interfaces.
 733  *
 734  * OUT:
 735  * @st_net_edev Structure with statistics.
 736  ***************************************************************************
 737  */
 738 void read_net_edev(struct stats_net_edev *st_net_edev, int nbr)
 739 {
 740         FILE *fp;
 741         struct stats_net_edev *st_net_edev_i;
 742         static char line[256];
 743         char iface[MAX_IFACE_LEN];
 744         int dev = 0;
 745         int pos;
 746
 747         if ((fp = fopen(NET_DEV, "r")) == NULL)
 748                 return;
 749
 750         while ((fgets(line, 256, fp) != NULL) && (dev < nbr)) {
 751
 752                 pos = strcspn(line, ":");
 753                 if (pos < strlen(line)) {
 754                         st_net_edev_i = st_net_edev + dev;
 755                         strncpy(iface, line, MINIMUM(pos, MAX_IFACE_LEN - 1));
 756                         iface[MINIMUM(pos, MAX_IFACE_LEN - 1)] = '\0';
 757                         sscanf(iface, "%s", st_net_edev_i->interface); /* Skip heading spaces */
 758                         sscanf(line + pos + 1, "%*u %*u %lu %lu %lu %lu %*u %*u %*u %*u "
 759                                "%lu %lu %lu %lu %lu",
 760                                &st_net_edev_i->rx_errors,
 761                                &st_net_edev_i->rx_dropped,
 762                                &st_net_edev_i->rx_fifo_errors,
 763                                &st_net_edev_i->rx_frame_errors,
 764                                &st_net_edev_i->tx_errors,
 765                                &st_net_edev_i->tx_dropped,
 766                                &st_net_edev_i->tx_fifo_errors,
 767                                &st_net_edev_i->collisions,
 768                                &st_net_edev_i->tx_carrier_errors);
 769                         dev++;
 770                 }
 771         }
 772
 773         fclose(fp);
 774 }
 775
 776 /*
 777  ***************************************************************************
 778  * Read NFS client statistics from /proc/net/rpc/nfs.
 779  *
 780  * IN:
 781  * @st_net_nfs  Structure where stats will be saved.
 782  *
 783  * OUT:
 784  * @st_net_nfs  Structure with statistics.
 785  ***************************************************************************
 786  */
 787 void read_net_nfs(struct stats_net_nfs *st_net_nfs)
 788 {
 789         FILE *fp;
 790         char line[256];
 791         unsigned int getattcnt = 0, accesscnt = 0, readcnt = 0, writecnt = 0;
 792
 793         if ((fp = fopen(NET_RPC_NFS, "r")) == NULL)
 794                 return;
 795
 796         memset(st_net_nfs, 0, STATS_NET_NFS_SIZE);
 797
 798         while (fgets(line, 256, fp) != NULL) {
 799
 800                 if (!strncmp(line, "rpc ", 4)) {
 801                         sscanf(line + 4, "%u %u",
 802                                &st_net_nfs->nfs_rpccnt, &st_net_nfs->nfs_rpcretrans);
 803                 }
 804                 else if (!strncmp(line, "proc3 ", 6)) {
 805                         sscanf(line + 6, "%*u %*u %u %*u %*u %u %*u %u %u",
 806                                &getattcnt, &accesscnt, &readcnt, &writecnt);
 807
 808                         st_net_nfs->nfs_getattcnt += getattcnt;
 809                         st_net_nfs->nfs_accesscnt += accesscnt;
 810                         st_net_nfs->nfs_readcnt   += readcnt;
 811                         st_net_nfs->nfs_writecnt  += writecnt;
 812                 }
 813                 else if (!strncmp(line, "proc4 ", 6)) {
 814                         sscanf(line + 6, "%*u %*u %u %u "
 815                                "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %u %u",
 816                                &readcnt, &writecnt, &accesscnt, &getattcnt);
 817
 818                         st_net_nfs->nfs_getattcnt += getattcnt;
 819                         st_net_nfs->nfs_accesscnt += accesscnt;
 820                         st_net_nfs->nfs_readcnt   += readcnt;
 821                         st_net_nfs->nfs_writecnt  += writecnt;
 822                 }
 823         }
 824
 825         fclose(fp);
 826 }
 827
 828 /*
 829  ***************************************************************************
 830  * Read NFS server statistics from /proc/net/rpc/nfsd.
 831  *
 832  * IN:
 833  * @st_net_nfsd Structure where stats will be saved.
 834  *
 835  * OUT:
 836  * @st_net_nfsd Structure with statistics.
 837  ***************************************************************************
 838  */
 839 void read_net_nfsd(struct stats_net_nfsd *st_net_nfsd)
 840 {
 841         FILE *fp;
 842         char line[256];
 843         unsigned int getattcnt = 0, accesscnt = 0, readcnt = 0, writecnt = 0;
 844
 845         if ((fp = fopen(NET_RPC_NFSD, "r")) == NULL)
 846                 return;
 847
 848         memset(st_net_nfsd, 0, STATS_NET_NFSD_SIZE);
 849
 850         while (fgets(line, 256, fp) != NULL) {
 851
 852                 if (!strncmp(line, "rc ", 3)) {
 853                         sscanf(line + 3, "%u %u",
 854                                &st_net_nfsd->nfsd_rchits, &st_net_nfsd->nfsd_rcmisses);
 855                 }
 856                 else if (!strncmp(line, "net ", 4)) {
 857                         sscanf(line + 4, "%u %u %u",
 858                                &st_net_nfsd->nfsd_netcnt, &st_net_nfsd->nfsd_netudpcnt,
 859                                &st_net_nfsd->nfsd_nettcpcnt);
 860                 }
 861                 else if (!strncmp(line, "rpc ", 4)) {
 862                         sscanf(line + 4, "%u %u",
 863                                &st_net_nfsd->nfsd_rpccnt, &st_net_nfsd->nfsd_rpcbad);
 864                 }
 865                 else if (!strncmp(line, "proc3 ", 6)) {
 866                         sscanf(line + 6, "%*u %*u %u %*u %*u %u %*u %u %u",
 867                                &getattcnt, &accesscnt, &readcnt, &writecnt);
 868
 869                         st_net_nfsd->nfsd_getattcnt += getattcnt;
 870                         st_net_nfsd->nfsd_accesscnt += accesscnt;
 871                         st_net_nfsd->nfsd_readcnt   += readcnt;
 872                         st_net_nfsd->nfsd_writecnt  += writecnt;
 873
 874                 }
 875                 else if (!strncmp(line, "proc4ops ", 9)) {
 876                         sscanf(line + 9, "%*u %*u %*u %*u %u "
 877                                "%*u %*u %*u %*u %*u %u "
 878                                "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %u "
 879                                "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %u",
 880                                &accesscnt, &getattcnt, &readcnt, &writecnt);
 881
 882                         st_net_nfsd->nfsd_getattcnt += getattcnt;
 883                         st_net_nfsd->nfsd_accesscnt += accesscnt;
 884                         st_net_nfsd->nfsd_readcnt   += readcnt;
 885                         st_net_nfsd->nfsd_writecnt  += writecnt;
 886                 }
 887         }
 888
 889         fclose(fp);
 890 }
 891
 892 /*
 893  ***************************************************************************
 894  * Read network sockets statistics from /proc/net/sockstat.
 895  *
 896  * IN:
 897  * @st_net_sock Structure where stats will be saved.
 898  *
 899  * OUT:
 900  * @st_net_sock Structure with statistics.
 901  ***************************************************************************
 902  */
 903 void read_net_sock(struct stats_net_sock *st_net_sock)
 904 {
 905         FILE *fp;
 906         char line[96];
 907         char *p;
 908
 909         if ((fp = fopen(NET_SOCKSTAT, "r")) == NULL)
 910                 return;
 911
 912         while (fgets(line, 96, fp) != NULL) {
 913
 914                 if (!strncmp(line, "sockets:", 8)) {
 915                         /* Sockets */
 916                         sscanf(line + 14, "%u", &st_net_sock->sock_inuse);
 917                 }
 918                 else if (!strncmp(line, "TCP:", 4)) {
 919                         /* TCP sockets */
 920                         sscanf(line + 11, "%u", &st_net_sock->tcp_inuse);
 921                         if ((p = strstr(line, "tw")) != NULL) {
 922                                 sscanf(p + 2, "%u", &st_net_sock->tcp_tw);
 923                         }
 924                 }
 925                 else if (!strncmp(line, "UDP:", 4)) {
 926                         /* UDP sockets */
 927                         sscanf(line + 11, "%u", &st_net_sock->udp_inuse);
 928                 }
 929                 else if (!strncmp(line, "RAW:", 4)) {
 930                         /* RAW sockets */
 931                         sscanf(line + 11, "%u", &st_net_sock->raw_inuse);
 932                 }
 933                 else if (!strncmp(line, "FRAG:", 5)) {
 934                         /* FRAGments */
 935                         sscanf(line + 12, "%u", &st_net_sock->frag_inuse);
 936                 }
 937         }
 938
 939         fclose(fp);
 940 }
 941
 942 /*
 943  ***************************************************************************
 944  * Read IP network traffic statistics from /proc/net/snmp.
 945  *
 946  * IN:
 947  * @st_net_ip   Structure where stats will be saved.
 948  *
 949  * OUT:
 950  * @st_net_ip   Structure with statistics.
 951  ***************************************************************************
 952  */
 953 void read_net_ip(struct stats_net_ip *st_net_ip)
 954 {
 955         FILE *fp;
 956         char line[1024];
 957         int sw = FALSE;
 958
 959         if ((fp = fopen(NET_SNMP, "r")) == NULL)
 960                 return;
 961
 962         while (fgets(line, 1024, fp) != NULL) {
 963
 964                 if (!strncmp(line, "Ip:", 3)) {
 965                         if (sw) {
 966                                 sscanf(line + 3, "%*u %*u %lu %*u %*u %lu %*u %*u "
 967                                        "%lu %lu %*u %*u %*u %lu %lu %*u %lu %*u %lu",
 968                                        &st_net_ip->InReceives,
 969                                        &st_net_ip->ForwDatagrams,
 970                                        &st_net_ip->InDelivers,
 971                                        &st_net_ip->OutRequests,
 972                                        &st_net_ip->ReasmReqds,
 973                                        &st_net_ip->ReasmOKs,
 974                                        &st_net_ip->FragOKs,
 975                                        &st_net_ip->FragCreates);
 976
 977                                 break;
 978                         }
 979                         else {
 980                                 sw = TRUE;
 981                         }
 982                 }
 983         }
 984
 985         fclose(fp);
 986 }
 987
 988 /*
 989  ***************************************************************************
 990  * Read IP network error statistics from /proc/net/snmp.
 991  *
 992  * IN:
 993  * @st_net_eip  Structure where stats will be saved.
 994  *
 995  * OUT:
 996  * @st_net_eip  Structure with statistics.
 997  ***************************************************************************
 998  */
 999 void read_net_eip(struct stats_net_eip *st_net_eip)
1000 {
1001         FILE *fp;
1002         char line[1024];
1003         int sw = FALSE;
1004
1005         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1006                 return;
1007
1008         while (fgets(line, 1024, fp) != NULL) {
1009
1010                 if (!strncmp(line, "Ip:", 3)) {
1011                         if (sw) {
1012                                 sscanf(line + 3, "%*u %*u %*u %lu %lu %*u %lu %lu "
1013                                        "%*u %*u %lu %lu %*u %*u %*u %lu %*u %lu",
1014                                        &st_net_eip->InHdrErrors,
1015                                        &st_net_eip->InAddrErrors,
1016                                        &st_net_eip->InUnknownProtos,
1017                                        &st_net_eip->InDiscards,
1018                                        &st_net_eip->OutDiscards,
1019                                        &st_net_eip->OutNoRoutes,
1020                                        &st_net_eip->ReasmFails,
1021                                        &st_net_eip->FragFails);
1022
1023                                 break;
1024                         }
1025                         else {
1026                                 sw = TRUE;
1027                         }
1028                 }
1029         }
1030
1031         fclose(fp);
1032 }
1033
1034 /*
1035  ***************************************************************************
1036  * Read ICMP network traffic statistics from /proc/net/snmp.
1037  *
1038  * IN:
1039  * @st_net_icmp Structure where stats will be saved.
1040  *
1041  * OUT:
1042  * @st_net_icmp Structure with statistics.
1043  ***************************************************************************
1044  */
1045 void read_net_icmp(struct stats_net_icmp *st_net_icmp)
1046 {
1047         FILE *fp;
1048         char line[1024];
1049         int sw = FALSE;
1050
1051         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1052                 return;
1053
1054         while (fgets(line, 1024, fp) != NULL) {
1055
1056                 if (!strncmp(line, "Icmp:", 5)) {
1057                         if (sw) {
1058                                 sscanf(line + 5, "%lu %*u %*u %*u %*u %*u %*u "
1059                                        "%lu %lu %lu %lu %lu %lu %lu %*u %*u %*u %*u "
1060                                        "%*u %*u %lu %lu %lu %lu %lu %lu",
1061                                        &st_net_icmp->InMsgs,
1062                                        &st_net_icmp->InEchos,
1063                                        &st_net_icmp->InEchoReps,
1064                                        &st_net_icmp->InTimestamps,
1065                                        &st_net_icmp->InTimestampReps,
1066                                        &st_net_icmp->InAddrMasks,
1067                                        &st_net_icmp->InAddrMaskReps,
1068                                        &st_net_icmp->OutMsgs,
1069                                        &st_net_icmp->OutEchos,
1070                                        &st_net_icmp->OutEchoReps,
1071                                        &st_net_icmp->OutTimestamps,
1072                                        &st_net_icmp->OutTimestampReps,
1073                                        &st_net_icmp->OutAddrMasks,
1074                                        &st_net_icmp->OutAddrMaskReps);
1075
1076                                 break;
1077                         }
1078                         else {
1079                                 sw = TRUE;
1080                         }
1081                 }
1082         }
1083
1084         fclose(fp);
1085 }
1086
1087 /*
1088  ***************************************************************************
1089  * Read ICMP network error statistics from /proc/net/snmp.
1090  *
1091  * IN:
1092  * @st_net_eicmp        Structure where stats will be saved.
1093  *
1094  * OUT:
1095  * @st_net_eicmp        Structure with statistics.
1096  ***************************************************************************
1097  */
1098 void read_net_eicmp(struct stats_net_eicmp *st_net_eicmp)
1099 {
1100         FILE *fp;
1101         char line[1024];
1102         int sw = FALSE;
1103
1104         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1105                 return;
1106
1107         while (fgets(line, 1024, fp) != NULL) {
1108
1109                 if (!strncmp(line, "Icmp:", 5)) {
1110                         if (sw) {
1111                                 sscanf(line + 5, "%*u %lu %lu %lu %lu %lu %lu %*u %*u "
1112                                        "%*u %*u %*u %*u %*u %lu %lu %lu %lu %lu %lu",
1113                                        &st_net_eicmp->InErrors,
1114                                        &st_net_eicmp->InDestUnreachs,
1115                                        &st_net_eicmp->InTimeExcds,
1116                                        &st_net_eicmp->InParmProbs,
1117                                        &st_net_eicmp->InSrcQuenchs,
1118                                        &st_net_eicmp->InRedirects,
1119                                        &st_net_eicmp->OutErrors,
1120                                        &st_net_eicmp->OutDestUnreachs,
1121                                        &st_net_eicmp->OutTimeExcds,
1122                                        &st_net_eicmp->OutParmProbs,
1123                                        &st_net_eicmp->OutSrcQuenchs,
1124                                        &st_net_eicmp->OutRedirects);
1125
1126                                 break;
1127                         }
1128                         else {
1129                                 sw = TRUE;
1130                         }
1131                 }
1132         }
1133
1134         fclose(fp);
1135 }
1136
1137 /*
1138  ***************************************************************************
1139  * Read TCP network traffic statistics from /proc/net/snmp.
1140  *
1141  * IN:
1142  * @st_net_tcp  Structure where stats will be saved.
1143  *
1144  * OUT:
1145  * @st_net_tcp  Structure with statistics.
1146  ***************************************************************************
1147  */
1148 void read_net_tcp(struct stats_net_tcp *st_net_tcp)
1149 {
1150         FILE *fp;
1151         char line[1024];
1152         int sw = FALSE;
1153
1154         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1155                 return;
1156
1157         while (fgets(line, 1024, fp) != NULL) {
1158
1159                 if (!strncmp(line, "Tcp:", 4)) {
1160                         if (sw) {
1161                                 sscanf(line + 4, "%*u %*u %*u %*d %lu %lu "
1162                                        "%*u %*u %*u %lu %lu",
1163                                        &st_net_tcp->ActiveOpens,
1164                                        &st_net_tcp->PassiveOpens,
1165                                        &st_net_tcp->InSegs,
1166                                        &st_net_tcp->OutSegs);
1167
1168                                 break;
1169                         }
1170                         else {
1171                                 sw = TRUE;
1172                         }
1173                 }
1174         }
1175
1176         fclose(fp);
1177 }
1178
1179 /*
1180  ***************************************************************************
1181  * Read TCP network error statistics from /proc/net/snmp.
1182  *
1183  * IN:
1184  * @st_net_etcp Structure where stats will be saved.
1185  *
1186  * OUT:
1187  * @st_net_etcp Structure with statistics.
1188  ***************************************************************************
1189  */
1190 void read_net_etcp(struct stats_net_etcp *st_net_etcp)
1191 {
1192         FILE *fp;
1193         char line[1024];
1194         int sw = FALSE;
1195
1196         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1197                 return;
1198
1199         while (fgets(line, 1024, fp) != NULL) {
1200
1201                 if (!strncmp(line, "Tcp:", 4)) {
1202                         if (sw) {
1203                                 sscanf(line + 4, "%*u %*u %*u %*d %*u %*u "
1204                                        "%lu %lu %*u %*u %*u %lu %lu %lu",
1205                                        &st_net_etcp->AttemptFails,
1206                                        &st_net_etcp->EstabResets,
1207                                        &st_net_etcp->RetransSegs,
1208                                        &st_net_etcp->InErrs,
1209                                        &st_net_etcp->OutRsts);
1210
1211                                 break;
1212                         }
1213                         else {
1214                                 sw = TRUE;
1215                         }
1216                 }
1217         }
1218
1219         fclose(fp);
1220 }
1221
1222 /*
1223  ***************************************************************************
1224  * Read UDP network traffic statistics from /proc/net/snmp.
1225  *
1226  * IN:
1227  * @st_net_udp  Structure where stats will be saved.
1228  *
1229  * OUT:
1230  * @st_net_udp  Structure with statistics.
1231  ***************************************************************************
1232  */
1233 void read_net_udp(struct stats_net_udp *st_net_udp)
1234 {
1235         FILE *fp;
1236         char line[1024];
1237         int sw = FALSE;
1238
1239         if ((fp = fopen(NET_SNMP, "r")) == NULL)
1240                 return;
1241
1242         while (fgets(line, 1024, fp) != NULL) {
1243
1244                 if (!strncmp(line, "Udp:", 4)) {
1245                         if (sw) {
1246                                 sscanf(line + 4, "%lu %lu %lu %lu",
1247                                        &st_net_udp->InDatagrams,
1248                                        &st_net_udp->NoPorts,
1249                                        &st_net_udp->InErrors,
1250                                        &st_net_udp->OutDatagrams);
1251
1252                                 break;
1253                         }
1254                         else {
1255                                 sw = TRUE;
1256                         }
1257                 }
1258         }
1259
1260         fclose(fp);
1261 }
1262
1263 /*
1264  ***************************************************************************
1265  * Read IPv6 network sockets statistics from /proc/net/sockstat6.
1266  *
1267  * IN:
1268  * @st_net_sock6        Structure where stats will be saved.
1269  *
1270  * OUT:
1271  * @st_net_sock6        Structure with statistics.
1272  ***************************************************************************
1273  */
1274 void read_net_sock6(struct stats_net_sock6 *st_net_sock6)
1275 {
1276         FILE *fp;
1277         char line[96];
1278
1279         if ((fp = fopen(NET_SOCKSTAT6, "r")) == NULL)
1280                 return;
1281
1282         while (fgets(line, 96, fp) != NULL) {
1283
1284                 if (!strncmp(line, "TCP6:", 5)) {
1285                         /* TCPv6 sockets */
1286                         sscanf(line + 12, "%u", &st_net_sock6->tcp6_inuse);
1287                 }
1288                 else if (!strncmp(line, "UDP6:", 5)) {
1289                         /* UDPv6 sockets */
1290                         sscanf(line + 12, "%u", &st_net_sock6->udp6_inuse);
1291                 }
1292                 else if (!strncmp(line, "RAW6:", 5)) {
1293                         /* IPv6 RAW sockets */
1294                         sscanf(line + 12, "%u", &st_net_sock6->raw6_inuse);
1295                 }
1296                 else if (!strncmp(line, "FRAG6:", 6)) {
1297                         /* IPv6 FRAGments */
1298                         sscanf(line + 13, "%u", &st_net_sock6->frag6_inuse);
1299                 }
1300         }
1301
1302         fclose(fp);
1303 }
1304
1305 /*
1306  ***************************************************************************
1307  * Read IPv6 network traffic statistics from /proc/net/snmp6.
1308  *
1309  * IN:
1310  * @st_net_ip6  Structure where stats will be saved.
1311  *
1312  * OUT:
1313  * @st_net_ip6  Structure with statistics.
1314  ***************************************************************************
1315  */
1316 void read_net_ip6(struct stats_net_ip6 *st_net_ip6)
1317 {
1318         FILE *fp;
1319         char line[128];
1320
1321         if ((fp = fopen(NET_SNMP6, "r")) == NULL)
1322                 return;
1323
1324         while (fgets(line, 128, fp) != NULL) {
1325
1326                 if (!strncmp(line, "Ip6InReceives ", 14)) {
1327                         sscanf(line + 14, "%lu", &st_net_ip6->InReceives6);
1328                 }
1329                 else if (!strncmp(line, "Ip6OutForwDatagrams ", 20)) {
1330                         sscanf(line + 20, "%lu", &st_net_ip6->OutForwDatagrams6);
1331                 }
1332                 else if (!strncmp(line, "Ip6InDelivers ", 14)) {
1333                         sscanf(line + 14, "%lu", &st_net_ip6->InDelivers6);
1334                 }
1335                 else if (!strncmp(line, "Ip6OutRequests ", 15)) {
1336                         sscanf(line + 15, "%lu", &st_net_ip6->OutRequests6);
1337                 }
1338                 else if (!strncmp(line, "Ip6ReasmReqds ", 14)) {
1339                         sscanf(line + 14, "%lu", &st_net_ip6->ReasmReqds6);
1340                 }
1341                 else if (!strncmp(line, "Ip6ReasmOKs ", 12)) {
1342                         sscanf(line + 12, "%lu", &st_net_ip6->ReasmOKs6);
1343                 }
1344                 else if (!strncmp(line, "Ip6InMcastPkts ", 15)) {
1345                         sscanf(line + 15, "%lu", &st_net_ip6->InMcastPkts6);
1346                 }
1347                 else if (!strncmp(line, "Ip6OutMcastPkts ", 16)) {
1348                         sscanf(line + 16, "%lu", &st_net_ip6->OutMcastPkts6);
1349                 }
1350                 else if (!strncmp(line, "Ip6FragOKs ", 11)) {
1351                         sscanf(line + 11, "%lu", &st_net_ip6->FragOKs6);
1352                 }
1353                 else if (!strncmp(line, "Ip6FragCreates ", 15)) {
1354                         sscanf(line + 15, "%lu", &st_net_ip6->FragCreates6);
1355                 }
1356         }
1357
1358         fclose(fp);
1359 }
1360
1361 /*
1362  ***************************************************************************
1363  * Read IPv6 network error statistics from /proc/net/snmp6.
1364  *
1365  * IN:
1366  * @st_net_eip6 Structure where stats will be saved.
1367  *
1368  * OUT:
1369  * @st_net_eip6 Structure with statistics.
1370  ***************************************************************************
1371  */
1372 void read_net_eip6(struct stats_net_eip6 *st_net_eip6)
1373 {
1374         FILE *fp;
1375         char line[128];
1376
1377         if ((fp = fopen(NET_SNMP6, "r")) == NULL)
1378                 return;
1379
1380         while (fgets(line, 128, fp) != NULL) {
1381
1382                 if (!strncmp(line, "Ip6InHdrErrors ", 15)) {
1383                         sscanf(line + 15, "%lu", &st_net_eip6->InHdrErrors6);
1384                 }
1385                 else if (!strncmp(line, "Ip6InAddrErrors ", 16)) {
1386                         sscanf(line + 16, "%lu", &st_net_eip6->InAddrErrors6);
1387                 }
1388                 else if (!strncmp(line, "Ip6InUnknownProtos ", 19)) {
1389                         sscanf(line + 19, "%lu", &st_net_eip6->InUnknownProtos6);
1390                 }
1391                 else if (!strncmp(line, "Ip6InTooBigErrors ", 18)) {
1392                         sscanf(line + 18, "%lu", &st_net_eip6->InTooBigErrors6);
1393                 }
1394                 else if (!strncmp(line, "Ip6InDiscards ", 14)) {
1395                         sscanf(line + 14, "%lu", &st_net_eip6->InDiscards6);
1396                 }
1397                 else if (!strncmp(line, "Ip6OutDiscards ", 15)) {
1398                         sscanf(line + 15, "%lu", &st_net_eip6->OutDiscards6);
1399                 }
1400                 else if (!strncmp(line, "Ip6InNoRoutes ", 14)) {
1401                         sscanf(line + 14, "%lu", &st_net_eip6->InNoRoutes6);
1402                 }
1403                 else if (!strncmp(line, "Ip6OutNoRoutes ", 15)) {
1404                         sscanf(line + 15, "%lu", &st_net_eip6->OutNoRoutes6);
1405                 }
1406                 else if (!strncmp(line, "Ip6ReasmFails ", 14)) {
1407                         sscanf(line + 14, "%lu", &st_net_eip6->ReasmFails6);
1408                 }
1409                 else if (!strncmp(line, "Ip6FragFails ", 13)) {
1410                         sscanf(line + 13, "%lu", &st_net_eip6->FragFails6);
1411                 }
1412                 else if (!strncmp(line, "Ip6InTruncatedPkts ", 19)) {
1413                         sscanf(line + 19, "%lu", &st_net_eip6->InTruncatedPkts6);
1414                 }
1415         }
1416
1417         fclose(fp);
1418 }
1419
1420 /*
1421  ***************************************************************************
1422  * Read ICMPv6 network traffic statistics from /proc/net/snmp6.
1423  *
1424  * IN:
1425  * @st_net_icmp6        Structure where stats will be saved.
1426  *
1427  * OUT:
1428  * @st_net_icmp6        Structure with statistics.
1429  ***************************************************************************
1430  */
1431 void read_net_icmp6(struct stats_net_icmp6 *st_net_icmp6)
1432 {
1433         FILE *fp;
1434         char line[128];
1435
1436         if ((fp = fopen(NET_SNMP6, "r")) == NULL)
1437                 return;
1438
1439         while (fgets(line, 128, fp) != NULL) {
1440
1441                 if (!strncmp(line, "Icmp6InMsgs ", 12)) {
1442                         sscanf(line + 12, "%lu", &st_net_icmp6->InMsgs6);
1443                 }
1444                 else if (!strncmp(line, "Icmp6OutMsgs ", 13)) {
1445                         sscanf(line + 13, "%lu", &st_net_icmp6->OutMsgs6);
1446                 }
1447                 else if (!strncmp(line, "Icmp6InEchos ", 13)) {
1448                         sscanf(line + 13, "%lu", &st_net_icmp6->InEchos6);
1449                 }
1450                 else if (!strncmp(line, "Icmp6InEchoReplies ", 19)) {
1451                         sscanf(line + 19, "%lu", &st_net_icmp6->InEchoReplies6);
1452                 }
1453                 else if (!strncmp(line, "Icmp6OutEchoReplies ", 20)) {
1454                         sscanf(line + 20, "%lu", &st_net_icmp6->OutEchoReplies6);
1455                 }
1456                 else if (!strncmp(line, "Icmp6InGroupMembQueries ", 24)) {
1457                         sscanf(line + 24, "%lu", &st_net_icmp6->InGroupMembQueries6);
1458                 }
1459                 else if (!strncmp(line, "Icmp6InGroupMembResponses ", 26)) {
1460                         sscanf(line + 26, "%lu", &st_net_icmp6->InGroupMembResponses6);
1461                 }
1462                 else if (!strncmp(line, "Icmp6OutGroupMembResponses ", 27)) {
1463                         sscanf(line + 27, "%lu", &st_net_icmp6->OutGroupMembResponses6);
1464                 }
1465                 else if (!strncmp(line, "Icmp6InGroupMembReductions ", 27)) {
1466                         sscanf(line + 27, "%lu", &st_net_icmp6->InGroupMembReductions6);
1467                 }
1468                 else if (!strncmp(line, "Icmp6OutGroupMembReductions ", 28)) {
1469                         sscanf(line + 28, "%lu", &st_net_icmp6->OutGroupMembReductions6);
1470                 }
1471                 else if (!strncmp(line, "Icmp6InRouterSolicits ", 22)) {
1472                         sscanf(line + 22, "%lu", &st_net_icmp6->InRouterSolicits6);
1473                 }
1474                 else if (!strncmp(line, "Icmp6OutRouterSolicits ", 23)) {
1475                         sscanf(line + 23, "%lu", &st_net_icmp6->OutRouterSolicits6);
1476                 }
1477                 else if (!strncmp(line, "Icmp6InRouterAdvertisements ", 28)) {
1478                         sscanf(line + 28, "%lu", &st_net_icmp6->InRouterAdvertisements6);
1479                 }
1480                 else if (!strncmp(line, "Icmp6InNeighborSolicits ", 24)) {
1481                         sscanf(line + 24, "%lu", &st_net_icmp6->InNeighborSolicits6);
1482                 }
1483                 else if (!strncmp(line, "Icmp6OutNeighborSolicits ", 25)) {
1484                         sscanf(line + 25, "%lu", &st_net_icmp6->OutNeighborSolicits6);
1485                 }
1486                 else if (!strncmp(line, "Icmp6InNeighborAdvertisements ", 30)) {
1487                         sscanf(line + 30, "%lu", &st_net_icmp6->InNeighborAdvertisements6);
1488                 }
1489                 else if (!strncmp(line, "Icmp6OutNeighborAdvertisements ", 31)) {
1490                         sscanf(line + 31, "%lu", &st_net_icmp6->OutNeighborAdvertisements6);
1491                 }
1492         }
1493
1494         fclose(fp);
1495 }
1496
1497 /*
1498  ***************************************************************************
1499  * Read ICMPv6 network error statistics from /proc/net/snmp6.
1500  *
1501  * IN:
1502  * @st_net_eicmp6       Structure where stats will be saved.
1503  *
1504  * OUT:
1505  * @st_net_eicmp6       Structure with statistics.
1506  ***************************************************************************
1507  */
1508 void read_net_eicmp6(struct stats_net_eicmp6 *st_net_eicmp6)
1509 {
1510         FILE *fp;
1511         char line[128];
1512
1513         if ((fp = fopen(NET_SNMP6, "r")) == NULL)
1514                 return;
1515
1516         while (fgets(line, 128, fp) != NULL) {
1517
1518                 if (!strncmp(line, "Icmp6InErrors ", 14)) {
1519                         sscanf(line + 14, "%lu", &st_net_eicmp6->InErrors6);
1520                 }
1521                 else if (!strncmp(line, "Icmp6InDestUnreachs ", 20)) {
1522                         sscanf(line + 20, "%lu", &st_net_eicmp6->InDestUnreachs6);
1523                 }
1524                 else if (!strncmp(line, "Icmp6OutDestUnreachs ", 21)) {
1525                         sscanf(line + 21, "%lu", &st_net_eicmp6->OutDestUnreachs6);
1526                 }
1527                 else if (!strncmp(line, "Icmp6InTimeExcds ", 17)) {
1528                         sscanf(line + 17, "%lu", &st_net_eicmp6->InTimeExcds6);
1529                 }
1530                 else if (!strncmp(line, "Icmp6OutTimeExcds ", 18)) {
1531                         sscanf(line + 18, "%lu", &st_net_eicmp6->OutTimeExcds6);
1532                 }
1533                 else if (!strncmp(line, "Icmp6InParmProblems ", 20)) {
1534                         sscanf(line + 20, "%lu", &st_net_eicmp6->InParmProblems6);
1535                 }
1536                 else if (!strncmp(line, "Icmp6OutParmProblems ", 21)) {
1537                         sscanf(line + 21, "%lu", &st_net_eicmp6->OutParmProblems6);
1538                 }
1539                 else if (!strncmp(line, "Icmp6InRedirects ", 17)) {
1540                         sscanf(line + 17, "%lu", &st_net_eicmp6->InRedirects6);
1541                 }
1542                 else if (!strncmp(line, "Icmp6OutRedirects ", 18)) {
1543                         sscanf(line + 18, "%lu", &st_net_eicmp6->OutRedirects6);
1544                 }
1545                 else if (!strncmp(line, "Icmp6InPktTooBigs ", 18)) {
1546                         sscanf(line + 18, "%lu", &st_net_eicmp6->InPktTooBigs6);
1547                 }
1548                 else if (!strncmp(line, "Icmp6OutPktTooBigs ", 19)) {
1549                         sscanf(line + 19, "%lu", &st_net_eicmp6->OutPktTooBigs6);
1550                 }
1551         }
1552
1553         fclose(fp);
1554 }
1555
1556 /*
1557  ***************************************************************************
1558  * Read UDPv6 network traffic statistics from /proc/net/snmp6.
1559  *
1560  * IN:
1561  * @st_net_udp6 Structure where stats will be saved.
1562  *
1563  * OUT:
1564  * @st_net_udp6 Structure with statistics.
1565  ***************************************************************************
1566  */
1567 void read_net_udp6(struct stats_net_udp6 *st_net_udp6)
1568 {
1569         FILE *fp;
1570         char line[128];
1571
1572         if ((fp = fopen(NET_SNMP6, "r")) == NULL)
1573                 return;
1574
1575         while (fgets(line, 128, fp) != NULL) {
1576
1577                 if (!strncmp(line, "Udp6InDatagrams ", 16)) {
1578                         sscanf(line + 16, "%lu", &st_net_udp6->InDatagrams6);
1579                 }
1580                 else if (!strncmp(line, "Udp6OutDatagrams ", 17)) {
1581                         sscanf(line + 17, "%lu", &st_net_udp6->OutDatagrams6);
1582                 }
1583                 else if (!strncmp(line, "Udp6NoPorts ", 12)) {
1584                         sscanf(line + 12, "%lu", &st_net_udp6->NoPorts6);
1585                 }
1586                 else if (!strncmp(line, "Udp6InErrors ", 13)) {
1587                         sscanf(line + 13, "%lu", &st_net_udp6->InErrors6);
1588                 }
1589         }
1590
1591         fclose(fp);
1592 }
1593
1594 /*
1595  ***************************************************************************
1596  * Read CPU frequency statistics.
1597  *
1598  * IN:
1599  * @st_pwr_cpufreq      Structure where stats will be saved.
1600  * @nbr                 Total number of CPU (including cpu "all").
1601  *
1602  * OUT:
1603  * @st_pwr_cpufreq      Structure with statistics.
1604  ***************************************************************************
1605  */
1606 void read_cpuinfo(struct stats_pwr_cpufreq *st_pwr_cpufreq, int nbr)
1607 {
1608         FILE *fp;
1609         struct stats_pwr_cpufreq *st_pwr_cpufreq_i;
1610         char line[1024];
1611         int proc_nb = 0, nr = 0;
1612         unsigned int ifreq, dfreq;
1613
1614         if ((fp = fopen(CPUINFO, "r")) == NULL)
1615                 return;
1616
1617         st_pwr_cpufreq->cpufreq = 0;
1618
1619         while (fgets(line, 1024, fp) != NULL) {
1620
1621                 if (!strncmp(line, "processor\t", 10)) {
1622                         sscanf(strchr(line, ':') + 1, "%d", &proc_nb);
1623                 }
1624
1625                 else if (!strncmp(line, "cpu MHz\t", 8)) {
1626                         sscanf(strchr(line, ':') + 1, "%u.%u", &ifreq, &dfreq);
1627
1628                         if (proc_nb < (nbr - 1)) {
1629                                 /* Save current CPU frequency */
1630                                 st_pwr_cpufreq_i = st_pwr_cpufreq + proc_nb + 1;
1631                                 st_pwr_cpufreq_i->cpufreq = ifreq * 100 + dfreq / 10;
1632
1633                                 /* Also save it to compute an average CPU frequency */
1634                                 st_pwr_cpufreq->cpufreq += st_pwr_cpufreq_i->cpufreq;
1635                                 nr++;
1636                         }
1637                         else if (!proc_nb && (nbr == 1)) {
1638                                 /*
1639                                  * We are reading freq for "Processor 0" and we have a machine
1640                                  * with only one processor and not an SMP kernel, with /sys not mounted
1641                                  * (the nr of proc has been counted using /proc/stat and there was
1642                                  * only one line with global CPU stats here).
1643                                  * This is a very specific case, I must admit...
1644                                  */
1645                                 st_pwr_cpufreq->cpufreq = ifreq * 100 + dfreq / 10;
1646                         }
1647                 }
1648         }
1649
1650         fclose(fp);
1651
1652         if (nr) {
1653                 /* Compute average CPU frequency for this machine */
1654                 st_pwr_cpufreq->cpufreq /= nr;
1655         }
1656 }
1657
1658 /*
1659  ***************************************************************************
1660  * Read hugepages statistics from /proc/meminfo.
1661  *
1662  * IN:
1663  * @st_huge     Structure where stats will be saved.
1664  *
1665  * OUT:
1666  * @st_huge     Structure with statistics.
1667  ***************************************************************************
1668  */
1669 void read_meminfo_huge(struct stats_huge *st_huge)
1670 {
1671         FILE *fp;
1672         char line[128];
1673         unsigned long szhkb = 0;
1674
1675         if ((fp = fopen(MEMINFO, "r")) == NULL)
1676                 return;
1677
1678         while (fgets(line, 128, fp) != NULL) {
1679
1680                 if (!strncmp(line, "HugePages_Total:", 16)) {
1681                         /* Read the total number of huge pages */
1682                         sscanf(line + 16, "%lu", &st_huge->tlhkb);
1683                 }
1684                 else if (!strncmp(line, "HugePages_Free:", 15)) {
1685                         /* Read the number of free huge pages */
1686                         sscanf(line + 15, "%lu", &st_huge->frhkb);
1687                 }
1688                 else if (!strncmp(line, "Hugepagesize:", 13)) {
1689                         /* Read the default size of a huge page in kB */
1690                         sscanf(line + 13, "%lu", &szhkb);
1691                 }
1692         }
1693
1694         fclose(fp);
1695
1696         /* We want huge pages stats in kB and not expressed in a number of pages */
1697         st_huge->tlhkb *= szhkb;
1698         st_huge->frhkb *= szhkb;
1699 }
1700
1701 /*
1702  ***************************************************************************
1703  * Read CPU average frequencies statistics.
1704  *
1705  * IN:
1706  * @st_pwr_wghfreq      Structure where stats will be saved.
1707  * @cpu_nr              CPU number for which time_in_state date will be read.
1708  * @nbr                 Total number of states (frequencies).
1709  *
1710  * OUT:
1711  * @st_pwr_wghfreq      Structure with statistics.
1712  ***************************************************************************
1713  */
1714 void read_time_in_state(struct stats_pwr_wghfreq *st_pwr_wghfreq, int cpu_nr, int nbr)
1715 {
1716         FILE *fp;
1717         struct stats_pwr_wghfreq *st_pwr_wghfreq_j;
1718         char filename[MAX_PF_NAME];
1719         char line[128];
1720         int j = 0;
1721         unsigned long freq;
1722         unsigned long long time_in_state;
1723
1724         snprintf(filename, MAX_PF_NAME, "%s/cpu%d/%s",
1725                  SYSFS_DEVCPU, cpu_nr, SYSFS_TIME_IN_STATE);
1726         if ((fp = fopen(filename, "r")) == NULL)
1727                 return;
1728
1729         while (fgets(line, 128, fp) != NULL) {
1730
1731                 sscanf(line, "%lu %llu", &freq, &time_in_state);
1732
1733                 if (j < nbr) {
1734                         /* Save current frequency and time */
1735                         st_pwr_wghfreq_j = st_pwr_wghfreq + j;
1736                         st_pwr_wghfreq_j->freq = freq;
1737                         st_pwr_wghfreq_j->time_in_state = time_in_state;
1738                         j++;
1739                 }
1740         }
1741
1742         fclose(fp);
1743 }
1744
1745 /*
1746  ***************************************************************************
1747  * Read machine uptime, independently of the number of processors.
1748  *
1749  * OUT:
1750  * @uptime      Uptime value in jiffies.
1751  ***************************************************************************
1752  */
1753 void read_uptime(unsigned long long *uptime)
1754 {
1755         FILE *fp;
1756         char line[128];
1757         unsigned long up_sec, up_cent;
1758
1759         if ((fp = fopen(UPTIME, "r")) == NULL)
1760                 return;
1761
1762         if (fgets(line, 128, fp) == NULL)
1763                 return;
1764
1765         sscanf(line, "%lu.%lu", &up_sec, &up_cent);
1766         *uptime = (unsigned long long) up_sec * HZ +
1767                   (unsigned long long) up_cent * HZ / 100;
1768
1769         fclose(fp);
1770
1771 }
1772
1773 /*
1774  ***************************************************************************
1775  * Count number of interrupts that are in /proc/stat file.
1776  *
1777  * RETURNS:
1778  * Number of interrupts, including total number of interrupts.
1779  ***************************************************************************
1780  */
1781 int get_irq_nr(void)
1782 {
1783         FILE *fp;
1784         char line[8192];
1785         int in = 0;
1786         int pos = 4;
1787
1788         if ((fp = fopen(STAT, "r")) == NULL)
1789                 return 0;
1790
1791         while (fgets(line, 8192, fp) != NULL) {
1792
1793                 if (!strncmp(line, "intr ", 5)) {
1794
1795                         while (pos < strlen(line)) {
1796                                 in++;
1797                                 pos += strcspn(line + pos + 1, " ") + 1;
1798                         }
1799                 }
1800         }
1801
1802         fclose(fp);
1803
1804         return in;
1805 }
1806
1807 /*
1808  ***************************************************************************
1809  * Find number of serial lines that support tx/rx accounting
1810  * in /proc/tty/driver/serial file.
1811  *
1812  * RETURNS:
1813  * Number of serial lines supporting tx/rx accouting.
1814  ***************************************************************************
1815  */
1816 int get_serial_nr(void)
1817 {
1818         FILE *fp;
1819         char line[256];
1820         int sl = 0;
1821
1822         if ((fp = fopen(SERIAL, "r")) == NULL)
1823                 return 0;       /* No SERIAL file */
1824
1825         while (fgets(line, 256, fp) != NULL) {
1826                 /*
1827                  * tx/rx statistics are always present,
1828                  * except when serial line is unknown.
1829                  */
1830                 if (strstr(line, "tx:") != NULL) {
1831                         sl++;
1832                 }
1833         }
1834
1835         fclose(fp);
1836
1837         return sl;
1838 }
1839
1840 /*
1841  ***************************************************************************
1842  * Find number of interfaces (network devices) that are in /proc/net/dev
1843  * file.
1844  *
1845  * RETURNS:
1846  * Number of network interfaces.
1847  ***************************************************************************
1848  */
1849 int get_iface_nr(void)
1850 {
1851         FILE *fp;
1852         char line[128];
1853         int iface = 0;
1854
1855         if ((fp = fopen(NET_DEV, "r")) == NULL)
1856                 return 0;       /* No network device file */
1857
1858         while (fgets(line, 128, fp) != NULL) {
1859                 if (strchr(line, ':')) {
1860                         iface++;
1861                 }
1862         }
1863
1864         fclose(fp);
1865
1866         return iface;
1867 }
1868
1869 /*
1870  ***************************************************************************
1871  * Find number of devices and partitions available in /proc/diskstats.
1872  *
1873  * IN:
1874  * @count_part          Set to TRUE if devices _and_ partitions are to be
1875  *                      counted.
1876  * @only_used_dev       When counting devices, set to TRUE if only devices
1877  *                      with non zero stats must be counted.
1878  *
1879  * RETURNS:
1880  * Number of devices (and partitions).
1881  ***************************************************************************
1882  */
1883 int get_diskstats_dev_nr(int count_part, int only_used_dev)
1884 {
1885         FILE *fp;
1886         char line[256];
1887         char dev_name[MAX_NAME_LEN];
1888         int dev = 0, i;
1889         unsigned long rd_ios, wr_ios;
1890
1891         if ((fp = fopen(DISKSTATS, "r")) == NULL)
1892                 /* File non-existent */
1893                 return 0;
1894
1895         /*
1896          * Counting devices and partitions is simply a matter of counting
1897          * the number of lines...
1898          */
1899         while (fgets(line, 256, fp) != NULL) {
1900                 if (!count_part) {
1901                         i = sscanf(line, "%*d %*d %s %lu %*u %*u %*u %lu",
1902                                    dev_name, &rd_ios, &wr_ios);
1903                         if ((i == 2) || !is_device(dev_name))
1904                                 /* It was a partition and not a device */
1905                                 continue;
1906                         if (only_used_dev && !rd_ios && !wr_ios)
1907                                 /* Unused device */
1908                                 continue;
1909                 }
1910                 dev++;
1911         }
1912
1913         fclose(fp);
1914
1915         return dev;
1916 }
1917
1918 /*
1919  ***************************************************************************
1920  * Get number of devices in /proc/diskstats.
1921  *
1922  * IN:
1923  * @f   Non zero (true) if disks *and* partitions should be counted, and
1924  *      zero (false) if only disks must be counted.
1925  *
1926  * RETURNS:
1927  * Number of devices.
1928  ***************************************************************************
1929  */
1930 int get_disk_nr(unsigned int f)
1931 {
1932         int disk_nr;
1933
1934         /*
1935          * Partitions are taken into account by sar -d only with
1936          * kernels 2.6.25 and later.
1937          */
1938         disk_nr = get_diskstats_dev_nr(f, CNT_USED_DEV);
1939
1940         return disk_nr;
1941 }
1942
1943 /*
1944  ***************************************************************************
1945  * Count number of processors in /sys.
1946  *
1947  * RETURNS:
1948  * Number of processors (online and offline).
1949  * A value of 0 means that /sys was not mounted.
1950  * A value of N (!=0) means N processor(s) (cpu0 .. cpu(N-1)).
1951  ***************************************************************************
1952  */
1953 int get_sys_cpu_nr(void)
1954 {
1955         DIR *dir;
1956         struct dirent *drd;
1957         struct stat buf;
1958         char line[MAX_PF_NAME];
1959         int proc_nr = 0;
1960
1961         /* Open relevant /sys directory */
1962         if ((dir = opendir(SYSFS_DEVCPU)) == NULL)
1963                 return 0;
1964
1965         /* Get current file entry */
1966         while ((drd = readdir(dir)) != NULL) {
1967
1968                 if (!strncmp(drd->d_name, "cpu", 3) && isdigit(drd->d_name[3])) {
1969                         snprintf(line, MAX_PF_NAME, "%s/%s", SYSFS_DEVCPU, drd->d_name);
1970                         line[MAX_PF_NAME - 1] = '\0';
1971                         if (stat(line, &buf) < 0)
1972                                 continue;
1973                         if (S_ISDIR(buf.st_mode)) {
1974                                 proc_nr++;
1975                         }
1976                 }
1977         }
1978
1979         /* Close directory */
1980         closedir(dir);
1981
1982         return proc_nr;
1983 }
1984
1985 /*
1986  ***************************************************************************
1987  * Count number of processors in /proc/stat.
1988  *
1989  * RETURNS:
1990  * Number of processors. The returned value is greater than or equal to the
1991  * number of online processors.
1992  * A value of 0 means one processor and non SMP kernel.
1993  * A value of N (!=0) means N processor(s) (0 .. N-1) with SMP kernel.
1994  ***************************************************************************
1995  */
1996 int get_proc_cpu_nr(void)
1997 {
1998         FILE *fp;
1999         char line[16];
2000         int num_proc, proc_nr = -1;
2001
2002         if ((fp = fopen(STAT, "r")) == NULL) {
2003                 fprintf(stderr, _("Cannot open %s: %s\n"), STAT, strerror(errno));
2004                 exit(1);
2005         }
2006
2007         while (fgets(line, 16, fp) != NULL) {
2008
2009                 if (strncmp(line, "cpu ", 4) && !strncmp(line, "cpu", 3)) {
2010                         sscanf(line + 3, "%d", &num_proc);
2011                         if (num_proc > proc_nr) {
2012                                 proc_nr = num_proc;
2013                         }
2014                 }
2015         }
2016
2017         fclose(fp);
2018
2019         return (proc_nr + 1);
2020 }
2021
2022 /*
2023  ***************************************************************************
2024  * Count the number of processors on the machine.
2025  * Try to use /sys for that, or /proc/stat if /sys doesn't exist.
2026  *
2027  * IN:
2028  * @max_nr_cpus Maximum number of proc that sysstat can handle.
2029  *
2030  * RETURNS:
2031  * Number of processors.
2032  * 0: one proc and non SMP kernel.
2033  * 1: one proc and SMP kernel (NB: On SMP machines where all the CPUs but
2034  *    one have been disabled, we get the total number of proc since we use
2035  *    /sys to count them).
2036  * 2: two proc...
2037  ***************************************************************************
2038  */
2039 int get_cpu_nr(unsigned int max_nr_cpus)
2040 {
2041         int cpu_nr;
2042
2043         if ((cpu_nr = get_sys_cpu_nr()) == 0) {
2044                 /* /sys may be not mounted. Use /proc/stat instead */
2045                 cpu_nr = get_proc_cpu_nr();
2046         }
2047
2048         if (cpu_nr > max_nr_cpus) {
2049                 fprintf(stderr, _("Cannot handle so many processors!\n"));
2050                 exit(1);
2051         }
2052
2053         return cpu_nr;
2054 }
2055
2056 /*
2057  ***************************************************************************
2058  * Find number of interrupts available per processor (use
2059  * /proc/interrupts file or /proc/softirqs).
2060  *
2061  * IN:
2062  * @file                /proc file to read (interrupts or softirqs).
2063  * @max_nr_irqcpu       Maximum number of interrupts per processor that
2064  *                      sadc can handle.
2065  * @cpu_nr              Number of processors.
2066  *
2067  * RETURNS:
2068  * Number of interrupts per processor + a pre-allocation constant.
2069  ***************************************************************************
2070  */
2071 int get_irqcpu_nr(char *file, int max_nr_irqcpu, int cpu_nr)
2072 {
2073         FILE *fp;
2074         char *line = NULL;
2075         unsigned int irq = 0;
2076         int p;
2077
2078         if ((fp = fopen(file, "r")) == NULL)
2079                 return 0;       /* No interrupts file */
2080
2081         SREALLOC(line, char, INTERRUPTS_LINE + 11 * cpu_nr);
2082
2083         while ((fgets(line, INTERRUPTS_LINE + 11 * cpu_nr , fp) != NULL) &&
2084                (irq < max_nr_irqcpu)) {
2085                 p = strcspn(line, ":");
2086                 if ((p > 0) && (p < 16)) {
2087                         irq++;
2088                 }
2089         }
2090
2091         fclose(fp);
2092
2093         if (line) {
2094                 free(line);
2095         }
2096
2097         return irq;
2098 }
2099
2100 /*
2101  ***************************************************************************
2102  * Count number of possible frequencies for CPU#0.
2103  *
2104  * RETURNS:
2105  * Number of frequencies.
2106  ***************************************************************************
2107  */
2108 int get_freq_nr(void)
2109 {
2110         FILE *fp;
2111         char filename[MAX_PF_NAME];
2112         char line[128];
2113         int freq = 0;
2114
2115         snprintf(filename, MAX_PF_NAME, "%s/cpu0/%s",
2116                  SYSFS_DEVCPU, SYSFS_TIME_IN_STATE);
2117         if ((fp = fopen(filename, "r")) == NULL)
2118                 return 0;       /* No time_in_state file for CPU#0 */
2119
2120         while (fgets(line, 128, fp) != NULL) {
2121                 freq++;
2122         }
2123
2124         fclose(fp);
2125
2126         return freq;
2127 }