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rd_stats.c
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/*
* rd_stats.c: Read system statistics
* (C) 1999-2015 by Sebastien GODARD (sysstat <at> orange.fr)
*
***************************************************************************
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without the implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
***************************************************************************
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <dirent.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <unistd.h>
#include "common.h"
#include "rd_stats.h"
#include "ioconf.h"
#ifdef USE_NLS
#include <locale.h>
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
/*
***************************************************************************
* Read CPU statistics and machine uptime.
*
* IN:
* @st_cpu Structure where stats will be saved.
* @nbr Total number of CPU (including cpu "all").
*
* OUT:
* @st_cpu Structure with statistics.
* @uptime Machine uptime multiplied by the number of processors.
* @uptime0 Machine uptime. Filled only if previously set to zero.
***************************************************************************
*/
void read_stat_cpu(struct stats_cpu *st_cpu, int nbr,
unsigned long long *uptime, unsigned long long *uptime0)
{
FILE *fp;
struct stats_cpu *st_cpu_i;
struct stats_cpu sc;
char line[8192];
int proc_nb;
if ((fp = fopen(STAT, "r")) == NULL) {
fprintf(stderr, _("Cannot open %s: %s\n"), STAT, strerror(errno));
exit(2);
}
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "cpu ", 4)) {
/*
* All the fields don't necessarily exist,
* depending on the kernel version used.
*/
memset(st_cpu, 0, STATS_CPU_SIZE);
/*
* Read the number of jiffies spent in the different modes
* (user, nice, etc.) among all proc. CPU usage is not reduced
* to one processor to avoid rounding problems.
*/
sscanf(line + 5, "%llu %llu %llu %llu %llu %llu %llu %llu %llu %llu",
&st_cpu->cpu_user,
&st_cpu->cpu_nice,
&st_cpu->cpu_sys,
&st_cpu->cpu_idle,
&st_cpu->cpu_iowait,
&st_cpu->cpu_hardirq,
&st_cpu->cpu_softirq,
&st_cpu->cpu_steal,
&st_cpu->cpu_guest,
&st_cpu->cpu_guest_nice);
/*
* Compute the uptime of the system in jiffies (1/100ths of a second
* if HZ=100).
* Machine uptime is multiplied by the number of processors here.
*
* NB: Don't add cpu_guest/cpu_guest_nice because cpu_user/cpu_nice
* already include them.
*/
*uptime = st_cpu->cpu_user + st_cpu->cpu_nice +
st_cpu->cpu_sys + st_cpu->cpu_idle +
st_cpu->cpu_iowait + st_cpu->cpu_hardirq +
st_cpu->cpu_steal + st_cpu->cpu_softirq;
}
else if (!strncmp(line, "cpu", 3)) {
if (nbr > 1) {
/* All the fields don't necessarily exist */
memset(&sc, 0, STATS_CPU_SIZE);
/*
* Read the number of jiffies spent in the different modes
* (user, nice, etc) for current proc.
* This is done only on SMP machines.
*/
sscanf(line + 3, "%d %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu",
&proc_nb,
&sc.cpu_user,
&sc.cpu_nice,
&sc.cpu_sys,
&sc.cpu_idle,
&sc.cpu_iowait,
&sc.cpu_hardirq,
&sc.cpu_softirq,
&sc.cpu_steal,
&sc.cpu_guest,
&sc.cpu_guest_nice);
if (proc_nb < (nbr - 1)) {
st_cpu_i = st_cpu + proc_nb + 1;
*st_cpu_i = sc;
}
/*
* else additional CPUs have been dynamically registered
* in /proc/stat.
*/
if (!proc_nb && !*uptime0) {
/*
* Compute uptime reduced to one proc using proc#0.
* Done if /proc/uptime was unavailable.
*
* NB: Don't add cpu_guest/cpu_guest_nice because cpu_user/cpu_nice
* already include them.
*/
*uptime0 = sc.cpu_user + sc.cpu_nice +
sc.cpu_sys + sc.cpu_idle +
sc.cpu_iowait + sc.cpu_steal +
sc.cpu_hardirq + sc.cpu_softirq;
}
}
}
}
fclose(fp);
}
/*
***************************************************************************
* Read interrupts statistics from /proc/stat.
*
* IN:
* @st_irq Structure where stats will be saved.
* @nbr Number of interrupts to read, including the total number
* of interrupts.
*
* OUT:
* @st_irq Structure with statistics.
***************************************************************************
*/
void read_stat_irq(struct stats_irq *st_irq, int nbr)
{
FILE *fp;
struct stats_irq *st_irq_i;
char line[8192];
int i, pos;
if ((fp = fopen(STAT, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "intr ", 5)) {
/* Read total number of interrupts received since system boot */
sscanf(line + 5, "%llu", &st_irq->irq_nr);
pos = strcspn(line + 5, " ") + 5;
for (i = 1; i < nbr; i++) {
st_irq_i = st_irq + i;
sscanf(line + pos, " %llu", &st_irq_i->irq_nr);
pos += strcspn(line + pos + 1, " ") + 1;
}
}
}
fclose(fp);
}
/*
***************************************************************************
* Read memory statistics from /proc/meminfo.
*
* IN:
* @st_memory Structure where stats will be saved.
*
* OUT:
* @st_memory Structure with statistics.
***************************************************************************
*/
void read_meminfo(struct stats_memory *st_memory)
{
FILE *fp;
char line[128];
if ((fp = fopen(MEMINFO, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "MemTotal:", 9)) {
/* Read the total amount of memory in kB */
sscanf(line + 9, "%lu", &st_memory->tlmkb);
}
else if (!strncmp(line, "MemFree:", 8)) {
/* Read the amount of free memory in kB */
sscanf(line + 8, "%lu", &st_memory->frmkb);
}
else if (!strncmp(line, "Buffers:", 8)) {
/* Read the amount of buffered memory in kB */
sscanf(line + 8, "%lu", &st_memory->bufkb);
}
else if (!strncmp(line, "Cached:", 7)) {
/* Read the amount of cached memory in kB */
sscanf(line + 7, "%lu", &st_memory->camkb);
}
else if (!strncmp(line, "SwapCached:", 11)) {
/* Read the amount of cached swap in kB */
sscanf(line + 11, "%lu", &st_memory->caskb);
}
else if (!strncmp(line, "Active:", 7)) {
/* Read the amount of active memory in kB */
sscanf(line + 7, "%lu", &st_memory->activekb);
}
else if (!strncmp(line, "Inactive:", 9)) {
/* Read the amount of inactive memory in kB */
sscanf(line + 9, "%lu", &st_memory->inactkb);
}
else if (!strncmp(line, "SwapTotal:", 10)) {
/* Read the total amount of swap memory in kB */
sscanf(line + 10, "%lu", &st_memory->tlskb);
}
else if (!strncmp(line, "SwapFree:", 9)) {
/* Read the amount of free swap memory in kB */
sscanf(line + 9, "%lu", &st_memory->frskb);
}
else if (!strncmp(line, "Dirty:", 6)) {
/* Read the amount of dirty memory in kB */
sscanf(line + 6, "%lu", &st_memory->dirtykb);
}
else if (!strncmp(line, "Committed_AS:", 13)) {
/* Read the amount of commited memory in kB */
sscanf(line + 13, "%lu", &st_memory->comkb);
}
else if (!strncmp(line, "AnonPages:", 10)) {
/* Read the amount of pages mapped into userspace page tables in kB */
sscanf(line + 10, "%lu", &st_memory->anonpgkb);
}
else if (!strncmp(line, "Slab:", 5)) {
/* Read the amount of in-kernel data structures cache in kB */
sscanf(line + 5, "%lu", &st_memory->slabkb);
}
else if (!strncmp(line, "KernelStack:", 12)) {
/* Read the kernel stack utilization in kB */
sscanf(line + 12, "%lu", &st_memory->kstackkb);
}
else if (!strncmp(line, "PageTables:", 11)) {
/* Read the amount of memory dedicated to the lowest level of page tables in kB */
sscanf(line + 11, "%lu", &st_memory->pgtblkb);
}
else if (!strncmp(line, "VmallocUsed:", 12)) {
/* Read the amount of vmalloc area which is used in kB */
sscanf(line + 12, "%lu", &st_memory->vmusedkb);
}
}
fclose(fp);
}
/*
***************************************************************************
* Read machine uptime, independently of the number of processors.
*
* OUT:
* @uptime Uptime value in jiffies.
***************************************************************************
*/
void read_uptime(unsigned long long *uptime)
{
FILE *fp;
char line[128];
unsigned long up_sec, up_cent;
if ((fp = fopen(UPTIME, "r")) == NULL)
return;
if (fgets(line, sizeof(line), fp) == NULL) {
fclose(fp);
return;
}
sscanf(line, "%lu.%lu", &up_sec, &up_cent);
*uptime = (unsigned long long) up_sec * HZ +
(unsigned long long) up_cent * HZ / 100;
fclose(fp);
}
#ifdef SOURCE_SADC
/*---------------- BEGIN: FUNCTIONS USED BY SADC ONLY ---------------------*/
/*
***************************************************************************
* Replace octal codes in string with their corresponding characters.
*
* IN:
* @str String to parse.
*
* OUT:
* @str String with octal codes replaced with characters.
***************************************************************************
*/
void oct2chr(char *str)
{
int i = 0;
int j, len;
len = strlen(str);
while (i < len - 3) {
if ((str[i] == '\\') &&
(str[i + 1] >= '0') && (str[i + 1] <= '3') &&
(str[i + 2] >= '0') && (str[i + 2] <= '7') &&
(str[i + 3] >= '0') && (str[i + 3] <= '7')) {
/* Octal code found */
str[i] = (str[i + 1] - 48) * 64 +
(str[i + 2] - 48) * 8 +
(str[i + 3] - 48);
for (j = i + 4; j <= len; j++) {
str[j - 3] = str[j];
}
len -= 3;
}
i++;
}
}
/*
***************************************************************************
* Read processes (tasks) creation and context switches statistics
* from /proc/stat.
*
* IN:
* @st_pcsw Structure where stats will be saved.
*
* OUT:
* @st_pcsw Structure with statistics.
***************************************************************************
*/
void read_stat_pcsw(struct stats_pcsw *st_pcsw)
{
FILE *fp;
char line[8192];
if ((fp = fopen(STAT, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "ctxt ", 5)) {
/* Read number of context switches */
sscanf(line + 5, "%llu", &st_pcsw->context_switch);
}
else if (!strncmp(line, "processes ", 10)) {
/* Read number of processes created since system boot */
sscanf(line + 10, "%lu", &st_pcsw->processes);
}
}
fclose(fp);
}
/*
***************************************************************************
* Read queue and load statistics from /proc/loadavg and /proc/stat.
*
* IN:
* @st_queue Structure where stats will be saved.
*
* OUT:
* @st_queue Structure with statistics.
***************************************************************************
*/
void read_loadavg(struct stats_queue *st_queue)
{
FILE *fp;
char line[8192];
int load_tmp[3];
int rc;
if ((fp = fopen(LOADAVG, "r")) == NULL)
return;
/* Read load averages and queue length */
rc = fscanf(fp, "%d.%u %d.%u %d.%u %lu/%u %*d\n",
&load_tmp[0], &st_queue->load_avg_1,
&load_tmp[1], &st_queue->load_avg_5,
&load_tmp[2], &st_queue->load_avg_15,
&st_queue->nr_running,
&st_queue->nr_threads);
fclose(fp);
if (rc < 8)
return;
st_queue->load_avg_1 += load_tmp[0] * 100;
st_queue->load_avg_5 += load_tmp[1] * 100;
st_queue->load_avg_15 += load_tmp[2] * 100;
if (st_queue->nr_running) {
/* Do not take current process into account */
st_queue->nr_running--;
}
/* Read nr of tasks blocked from /proc/stat */
if ((fp = fopen(STAT, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "procs_blocked ", 14)) {
/* Read number of processes blocked */
sscanf(line + 14, "%lu", &st_queue->procs_blocked);
break;
}
}
fclose(fp);
}
/*
***************************************************************************
* Read swapping statistics from /proc/vmstat.
*
* IN:
* @st_swap Structure where stats will be saved.
*
* OUT:
* @st_swap Structure with statistics.
***************************************************************************
*/
void read_vmstat_swap(struct stats_swap *st_swap)
{
FILE *fp;
char line[128];
if ((fp = fopen(VMSTAT, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "pswpin ", 7)) {
/* Read number of swap pages brought in */
sscanf(line + 7, "%lu", &st_swap->pswpin);
}
else if (!strncmp(line, "pswpout ", 8)) {
/* Read number of swap pages brought out */
sscanf(line + 8, "%lu", &st_swap->pswpout);
}
}
fclose(fp);
}
/*
***************************************************************************
* Read paging statistics from /proc/vmstat.
*
* IN:
* @st_paging Structure where stats will be saved.
*
* OUT:
* @st_paging Structure with statistics.
***************************************************************************
*/
void read_vmstat_paging(struct stats_paging *st_paging)
{
FILE *fp;
char line[128];
unsigned long pgtmp;
if ((fp = fopen(VMSTAT, "r")) == NULL)
return;
st_paging->pgsteal = 0;
st_paging->pgscan_kswapd = st_paging->pgscan_direct = 0;
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "pgpgin ", 7)) {
/* Read number of pages the system paged in */
sscanf(line + 7, "%lu", &st_paging->pgpgin);
}
else if (!strncmp(line, "pgpgout ", 8)) {
/* Read number of pages the system paged out */
sscanf(line + 8, "%lu", &st_paging->pgpgout);
}
else if (!strncmp(line, "pgfault ", 8)) {
/* Read number of faults (major+minor) made by the system */
sscanf(line + 8, "%lu", &st_paging->pgfault);
}
else if (!strncmp(line, "pgmajfault ", 11)) {
/* Read number of faults (major only) made by the system */
sscanf(line + 11, "%lu", &st_paging->pgmajfault);
}
else if (!strncmp(line, "pgfree ", 7)) {
/* Read number of pages freed by the system */
sscanf(line + 7, "%lu", &st_paging->pgfree);
}
else if (!strncmp(line, "pgsteal_", 8)) {
/* Read number of pages stolen by the system */
sscanf(strchr(line, ' '), "%lu", &pgtmp);
st_paging->pgsteal += pgtmp;
}
else if (!strncmp(line, "pgscan_kswapd_", 14)) {
/* Read number of pages scanned by the kswapd daemon */
sscanf(strchr(line, ' '), "%lu", &pgtmp);
st_paging->pgscan_kswapd += pgtmp;
}
else if (!strncmp(line, "pgscan_direct_", 14)) {
/* Read number of pages scanned directly */
sscanf(strchr(line, ' '), "%lu", &pgtmp);
st_paging->pgscan_direct += pgtmp;
}
}
fclose(fp);
}
/*
***************************************************************************
* Read I/O and transfer rates statistics from /proc/diskstats.
*
* IN:
* @st_io Structure where stats will be saved.
*
* OUT:
* @st_io Structure with statistics.
***************************************************************************
*/
void read_diskstats_io(struct stats_io *st_io)
{
FILE *fp;
char line[256];
char dev_name[MAX_NAME_LEN];
unsigned int major, minor;
unsigned long rd_ios, wr_ios, rd_sec, wr_sec;
if ((fp = fopen(DISKSTATS, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
if (sscanf(line, "%u %u %s %lu %*u %lu %*u %lu %*u %lu",
&major, &minor, dev_name,
&rd_ios, &rd_sec, &wr_ios, &wr_sec) == 7) {
if (is_device(dev_name, IGNORE_VIRTUAL_DEVICES)) {
/*
* OK: It's a (real) device and not a partition.
* Note: Structure should have been initialized first!
*/
st_io->dk_drive += rd_ios + wr_ios;
st_io->dk_drive_rio += rd_ios;
st_io->dk_drive_rblk += rd_sec;
st_io->dk_drive_wio += wr_ios;
st_io->dk_drive_wblk += wr_sec;
}
}
}
fclose(fp);
}
/*
***************************************************************************
* Read block devices statistics from /proc/diskstats.
*
* IN:
* @st_disk Structure where stats will be saved.
* @nbr Maximum number of block devices.
* @read_part True if disks *and* partitions should be read; False if only
* disks are read.
*
* OUT:
* @st_disk Structure with statistics.
***************************************************************************
*/
void read_diskstats_disk(struct stats_disk *st_disk, int nbr, int read_part)
{
FILE *fp;
char line[256];
char dev_name[MAX_NAME_LEN];
int dsk = 0;
struct stats_disk *st_disk_i;
unsigned int major, minor, rd_ticks, wr_ticks, tot_ticks, rq_ticks;
unsigned long rd_ios, wr_ios, rd_sec, wr_sec;
if ((fp = fopen(DISKSTATS, "r")) == NULL)
return;
while ((fgets(line, sizeof(line), fp) != NULL) && (dsk < nbr)) {
if (sscanf(line, "%u %u %s %lu %*u %lu %u %lu %*u %lu"
" %u %*u %u %u",
&major, &minor, dev_name,
&rd_ios, &rd_sec, &rd_ticks, &wr_ios, &wr_sec, &wr_ticks,
&tot_ticks, &rq_ticks) == 11) {
if (!rd_ios && !wr_ios)
/* Unused device: Ignore it */
continue;
if (read_part || is_device(dev_name, ACCEPT_VIRTUAL_DEVICES)) {
st_disk_i = st_disk + dsk++;
st_disk_i->major = major;
st_disk_i->minor = minor;
st_disk_i->nr_ios = rd_ios + wr_ios;
st_disk_i->rd_sect = rd_sec;
st_disk_i->wr_sect = wr_sec;
st_disk_i->rd_ticks = rd_ticks;
st_disk_i->wr_ticks = wr_ticks;
st_disk_i->tot_ticks = tot_ticks;
st_disk_i->rq_ticks = rq_ticks;
}
}
}
fclose(fp);
}
/*
***************************************************************************
* Read serial lines statistics from /proc/tty/driver/serial.
*
* IN:
* @st_serial Structure where stats will be saved.
* @nbr Maximum number of serial lines.
*
* OUT:
* @st_serial Structure with statistics.
***************************************************************************
*/
void read_tty_driver_serial(struct stats_serial *st_serial, int nbr)
{
FILE *fp;
struct stats_serial *st_serial_i;
int sl = 0;
char line[256];
char *p;
if ((fp = fopen(SERIAL, "r")) == NULL)
return;
while ((fgets(line, sizeof(line), fp) != NULL) && (sl < nbr)) {
if ((p = strstr(line, "tx:")) != NULL) {
st_serial_i = st_serial + sl;
sscanf(line, "%u", &st_serial_i->line);
/*
* A value of 0 means an unused structure.
* So increment it to make sure it is not null.
*/
(st_serial_i->line)++;
/*
* Read the number of chars transmitted and received by
* current serial line.
*/
sscanf(p + 3, "%u", &st_serial_i->tx);
if ((p = strstr(line, "rx:")) != NULL) {
sscanf(p + 3, "%u", &st_serial_i->rx);
}
if ((p = strstr(line, "fe:")) != NULL) {
sscanf(p + 3, "%u", &st_serial_i->frame);
}
if ((p = strstr(line, "pe:")) != NULL) {
sscanf(p + 3, "%u", &st_serial_i->parity);
}
if ((p = strstr(line, "brk:")) != NULL) {
sscanf(p + 4, "%u", &st_serial_i->brk);
}
if ((p = strstr(line, "oe:")) != NULL) {
sscanf(p + 3, "%u", &st_serial_i->overrun);
}
sl++;
}
}
fclose(fp);
}
/*
***************************************************************************
* Read kernel tables statistics from various system files.
*
* IN:
* @st_ktables Structure where stats will be saved.
*
* OUT:
* @st_ktables Structure with statistics.
***************************************************************************
*/
void read_kernel_tables(struct stats_ktables *st_ktables)
{
FILE *fp;
unsigned int parm;
int rc = 0;
/* Open /proc/sys/fs/dentry-state file */
if ((fp = fopen(FDENTRY_STATE, "r")) != NULL) {
rc = fscanf(fp, "%*d %u",
&st_ktables->dentry_stat);
fclose(fp);
if (rc == 0) {
st_ktables->dentry_stat = 0;
}
}
/* Open /proc/sys/fs/file-nr file */
if ((fp = fopen(FFILE_NR, "r")) != NULL) {
rc = fscanf(fp, "%u %u",
&st_ktables->file_used, &parm);
fclose(fp);
/*
* The number of used handles is the number of allocated ones
* minus the number of free ones.
*/
if (rc == 2) {
st_ktables->file_used -= parm;
}
else {
st_ktables->file_used = 0;
}
}
/* Open /proc/sys/fs/inode-state file */
if ((fp = fopen(FINODE_STATE, "r")) != NULL) {
rc = fscanf(fp, "%u %u",
&st_ktables->inode_used, &parm);
fclose(fp);
/*
* The number of inuse inodes is the number of allocated ones
* minus the number of free ones.
*/
if (rc == 2) {
st_ktables->inode_used -= parm;
}
else {
st_ktables->inode_used = 0;
}
}
/* Open /proc/sys/kernel/pty/nr file */
if ((fp = fopen(PTY_NR, "r")) != NULL) {
rc = fscanf(fp, "%u",
&st_ktables->pty_nr);
fclose(fp);
if (rc == 0) {
st_ktables->pty_nr = 0;
}
}
}
/*
***************************************************************************
* Read network interfaces statistics from /proc/net/dev.
*
* IN:
* @st_net_dev Structure where stats will be saved.
* @nbr Maximum number of network interfaces.
*
* OUT:
* @st_net_dev Structure with statistics.
*
* RETURNS:
* Number of interfaces for which stats have been read.
***************************************************************************
*/
int read_net_dev(struct stats_net_dev *st_net_dev, int nbr)
{
FILE *fp;
struct stats_net_dev *st_net_dev_i;
char line[256];
char iface[MAX_IFACE_LEN];
int dev = 0;
int pos;
if ((fp = fopen(NET_DEV, "r")) == NULL)
return 0;
while ((fgets(line, sizeof(line), fp) != NULL) && (dev < nbr)) {
pos = strcspn(line, ":");
if (pos < strlen(line)) {
st_net_dev_i = st_net_dev + dev;
strncpy(iface, line, MINIMUM(pos, MAX_IFACE_LEN - 1));
iface[MINIMUM(pos, MAX_IFACE_LEN - 1)] = '\0';
sscanf(iface, "%s", st_net_dev_i->interface); /* Skip heading spaces */
sscanf(line + pos + 1, "%llu %llu %*u %*u %*u %*u %llu %llu %llu %llu "
"%*u %*u %*u %*u %*u %llu",
&st_net_dev_i->rx_bytes,
&st_net_dev_i->rx_packets,
&st_net_dev_i->rx_compressed,
&st_net_dev_i->multicast,
&st_net_dev_i->tx_bytes,
&st_net_dev_i->tx_packets,
&st_net_dev_i->tx_compressed);
dev++;
}
}
fclose(fp);
return dev;
}
/*
***************************************************************************
* Read duplex and speed data for network interface cards.
*
* IN:
* @st_net_dev Structure where stats will be saved.
* @nbr Real number of network interfaces available.
*
* OUT:
* @st_net_dev Structure with statistics.
***************************************************************************
*/
void read_if_info(struct stats_net_dev *st_net_dev, int nbr)
{
FILE *fp;
struct stats_net_dev *st_net_dev_i;
char filename[128], duplex[32];
int dev, n;
for (dev = 0; dev < nbr; dev++) {
st_net_dev_i = st_net_dev + dev;
/* Read speed info */
sprintf(filename, IF_DUPLEX, st_net_dev_i->interface);
if ((fp = fopen(filename, "r")) == NULL)
/* Cannot read NIC duplex */
continue;
n = fscanf(fp, "%31s", duplex);
fclose(fp);
if (n != 1)
/* Cannot read NIC duplex */
continue;
if (!strcmp(duplex, K_DUPLEX_FULL)) {
st_net_dev_i->duplex = C_DUPLEX_FULL;
}
else if (!strcmp(duplex, K_DUPLEX_HALF)) {
st_net_dev_i->duplex = C_DUPLEX_HALF;
}
else
continue;
/* Read speed info */
sprintf(filename, IF_SPEED, st_net_dev_i->interface);
if ((fp = fopen(filename, "r")) == NULL)
/* Cannot read NIC speed */
continue;
n = fscanf(fp, "%u", &st_net_dev_i->speed);
fclose(fp);
if (n != 1) {
st_net_dev_i->speed = 0;
}
}
}
/*
***************************************************************************
* Read network interfaces errors statistics from /proc/net/dev.
*
* IN:
* @st_net_edev Structure where stats will be saved.
* @nbr Maximum number of network interfaces.
*
* OUT:
* @st_net_edev Structure with statistics.
***************************************************************************
*/
void read_net_edev(struct stats_net_edev *st_net_edev, int nbr)
{
FILE *fp;
struct stats_net_edev *st_net_edev_i;
static char line[256];
char iface[MAX_IFACE_LEN];
int dev = 0;
int pos;
if ((fp = fopen(NET_DEV, "r")) == NULL)
return;
while ((fgets(line, sizeof(line), fp) != NULL) && (dev < nbr)) {
pos = strcspn(line, ":");
if (pos < strlen(line)) {
st_net_edev_i = st_net_edev + dev;
strncpy(iface, line, MINIMUM(pos, MAX_IFACE_LEN - 1));
iface[MINIMUM(pos, MAX_IFACE_LEN - 1)] = '\0';
sscanf(iface, "%s", st_net_edev_i->interface); /* Skip heading spaces */
sscanf(line + pos + 1, "%*u %*u %llu %llu %llu %llu %*u %*u %*u %*u "
"%llu %llu %llu %llu %llu",
&st_net_edev_i->rx_errors,
&st_net_edev_i->rx_dropped,
&st_net_edev_i->rx_fifo_errors,
&st_net_edev_i->rx_frame_errors,
&st_net_edev_i->tx_errors,
&st_net_edev_i->tx_dropped,
&st_net_edev_i->tx_fifo_errors,
&st_net_edev_i->collisions,
&st_net_edev_i->tx_carrier_errors);
dev++;
}
}
fclose(fp);
}
/*
***************************************************************************
* Read NFS client statistics from /proc/net/rpc/nfs.
*
* IN:
* @st_net_nfs Structure where stats will be saved.
*
* OUT:
* @st_net_nfs Structure with statistics.
***************************************************************************
*/
void read_net_nfs(struct stats_net_nfs *st_net_nfs)
{
FILE *fp;
char line[256];
unsigned int getattcnt = 0, accesscnt = 0, readcnt = 0, writecnt = 0;
if ((fp = fopen(NET_RPC_NFS, "r")) == NULL)
return;
memset(st_net_nfs, 0, STATS_NET_NFS_SIZE);
while (fgets(line, sizeof(line), fp) != NULL) {
if (!strncmp(line, "rpc ", 4)) {
sscanf(line + 4, "%u %u",
&st_net_nfs->nfs_rpccnt, &st_net_nfs->nfs_rpcretrans);
}
else if (!strncmp(line, "proc3 ", 6)) {
sscanf(line + 6, "%*u %*u %u %*u %*u %u %*u %u %u",
&getattcnt, &accesscnt, &readcnt, &writecnt);
st_net_nfs->nfs_getattcnt += getattcnt;
st_net_nfs->nfs_accesscnt += accesscnt;
st_net_nfs->nfs_readcnt += readcnt;
st_net_nfs->nfs_writecnt += writecnt;
}
else if (!strncmp(line, "proc4 ", 6)) {
sscanf(line + 6, "%*u %*u %u %u "
"%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %u %u",