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pslib_linux.c
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pslib_linux.c
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#include <ctype.h>
#include <mntent.h>
#include <pwd.h>
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <unistd.h>
#include <utmp.h>
#include "pslib.h"
#include "common.h"
/* TBD : Generic function to get field from a line in a file that starts with something */
/* Internal functions */
static int
logical_cpu_count()
{
int ret;
ret = (int)sysconf(_SC_NPROCESSORS_ONLN);
if (ret == -1) {
/* TDB: Parse /proc/cpuinfo */
;
}
return ret;
}
static int
physical_cpu_count()
{
FILE * fp = NULL;
size_t s = 100;
long int ids[s]; /* Assume we don't have more than 100 physical CPUs */
memset(&ids, -1, sizeof(long int) * 100);
long int *cid = ids;
long int id;
int nprocs = 0;
fp = fopen("/proc/cpuinfo", "r");
check(fp, "Couldn't open '/proc/cpuinfo'");
char *line = (char *)calloc(100, sizeof(char));
check_mem(line);
while (fgets(line, 90, fp) != NULL) {
if (strncasecmp(line, "physical id", 11) == 0){
strtok(line, ":");
id = strtol(strtok(NULL, " "), NULL, 10); /* TBD: Assuming that physical id is a number */
if (! lfind(&id, ids, &s, sizeof(int), int_comp)) { /* TBD: Replace this with lsearch */
*cid = id;
id++;
nprocs += 1;
} else {
;
}
}
}
fclose(fp);
free(line);
return nprocs;
error:
if (fp) fclose(fp);
free(line);
return -1;
}
static unsigned int
get_ppid(unsigned pid)
{
FILE *fp = NULL;
unsigned int ppid = -1;
char *tmp;
char procfile[50];
sprintf(procfile,"/proc/%d/status", pid);
fp = fopen(procfile,"r");
check(fp, "Couldn't open process status file");
tmp = grep_awk(fp, "PPid", 1, ":");
ppid = tmp?strtoul(tmp, NULL, 10):-1;
check(ppid != -1, "Couldnt' find Ppid in process status file");
fclose(fp);
free(tmp);
return ppid;
error:
if (fp) fclose(fp);
return -1;
}
static char *
get_procname(unsigned pid)
{
FILE *fp = NULL;
char *tmp;
char procfile[50];
char line[350];
sprintf(procfile,"/proc/%d/stat", pid);
fp = fopen(procfile,"r");
check(fp, "Couldn't open process status file");
fgets(line, 300, fp);
fclose(fp);
tmp = strtok(line, " ");
tmp = strtok(NULL, " "); /* Name field */
tmp = squeeze(tmp, "()");
return strdup(tmp);
error:
if (fp) fclose(fp);
return NULL;
}
static char *
get_exe(unsigned pid)
{
FILE *fp = NULL;
char *tmp = NULL;
char procfile[50];
ssize_t ret;
unsigned int bufsize = 1024;
struct stat buf;
sprintf(procfile,"/proc/%d/exe", pid);
tmp = calloc(bufsize, sizeof(char));
check_mem(tmp);
ret = readlink(procfile, tmp, bufsize - 1);
if (ret == -1 && errno == ENOENT) {
if (lstat(procfile, &buf) == 0) {
debug("Probably a system process. No executable");
strcpy(tmp, "");
return tmp;
} else {
sentinel("No such process");
}
}
check(ret != -1, "Couldn't expand symbolic link");
while(ret == bufsize -1 ) {
/* Buffer filled. Might be incomplete. Increase size and try again. */
bufsize *= 2;
tmp = realloc(tmp, bufsize);
ret = readlink(procfile, tmp, bufsize - 1);
check(ret != -1, "Couldn't expand symbolic link");
}
tmp[ret] = '\0';
return tmp;
error:
if (fp) fclose(fp);
if (tmp) free(tmp);
return NULL;
}
static char *
get_cmdline(unsigned int pid)
{
FILE *fp = NULL;
char procfile[50];
char *contents = NULL;
size_t size = 0;
sprintf(procfile,"/proc/%d/cmdline", pid);
fp = fopen(procfile, "r");
check(fp, "Couldn't open process cmdline file");
size = getline(&contents, &size, fp); /*size argument unused since *contents is NULL */
check(size != -1, "Couldn't read command line from /proc");
fclose(fp);
return contents;
error:
if (fp) fclose(fp);
if (contents) free(contents);
return NULL;
}
static unsigned long
get_create_time(unsigned int pid)
{
FILE *fp = NULL;
char procfile[50];
char *contents = NULL;
size_t size = 0;
sprintf(procfile,"/proc/%d/stat", pid);
fp = fopen(procfile, "r");
check(fp, "Couldn't open process stat file");
size = getline(&contents, &size, fp); /* size argument unused */
error:
if (fp) fclose(fp);
if (contents) free(contents);
return -1;
}
static unsigned int *
get_ids(unsigned int pid, const char *field)
/* field parameter is used to determine which line to parse (Uid or Gid) */
{
FILE *fp = NULL;
char *tmp;
char procfile[50];
char line[400];
unsigned int* retval = NULL;
sprintf(procfile,"/proc/%d/status", pid);
fp = fopen(procfile,"r");
check(fp, "Couldn't open process status file");
while (fgets(line, 399, fp) != NULL) {
if (strncmp(line, field, 4) == 0) {
retval = (unsigned int *)calloc(3, sizeof(unsigned int));
check_mem(retval);
tmp = strtok(line, "\t");
tmp = strtok(NULL, "\t");
retval[0] = strtoul(tmp, NULL, 10); /* Real UID */
tmp = strtok(NULL, "\t");
retval[1] = strtoul(tmp, NULL, 10); /* Effective UID */
tmp = strtok(NULL, "\t");
retval[2] = strtoul(tmp, NULL, 10); /* Saved UID */
break;
}
}
check(retval != NULL, "Couldnt' find Uid in process status file");
fclose(fp);
return retval;
error:
if (fp) fclose(fp);
return NULL;
}
static char *
get_username(unsigned int ruid)
{
struct passwd *ret = NULL;
char *username = NULL;
ret = getpwuid(ruid);
check(ret, "Couldn't access passwd database for entry %d", ruid);
username = strdup(ret->pw_name);
check(username, "Couldn't allocate memory for name");
return username;
error:
return NULL;
}
static char *
get_terminal(unsigned int pid)
{
FILE *fp = NULL;
char *tmp = NULL;
char procfile[50];
ssize_t ret;
unsigned int bufsize = 1024;
sprintf(procfile,"/proc/%d/fd/0", pid);
tmp = calloc(bufsize, sizeof(char));
check_mem(tmp);
ret = readlink(procfile, tmp, bufsize - 1);
check(ret != -1, "Couldn't expand symbolic link");
while(ret == bufsize -1 ) {
/* Buffer filled. Might be incomplete. Increase size and try again. */
bufsize *= 2;
tmp = realloc(tmp, bufsize);
ret = readlink(procfile, tmp, bufsize - 1);
check(ret != -1, "Couldn't expand symbolic link");
}
tmp[ret] = '\0';
return tmp;
error:
if (fp) fclose(fp);
if (tmp) free(tmp);
return NULL;
}
static long
get_clock_ticks() {
static long ret;
if(ret == 0) {
ret = sysconf(_SC_CLK_TCK);
}
return ret;
}
static int
parse_proc_stat_line(char* line, CpuTimes *ret) {
unsigned long values[10] = {};
char *pos = strtok(line, " ");
pos = strtok(NULL, " "); // skip cpu
int i;
for(i = 0; i < 10 && pos != NULL; i++) {
values[i] = strtoul(pos, NULL, 10);
pos = strtok(NULL, " ");
}
if(i < 10) return -1;
double tick = (double)get_clock_ticks();
ret->user = values[0] / tick;
ret->nice = values[1] / tick;
ret->system = values[2] / tick;
ret->idle = values[3] / tick;
ret->iowait = values[4] / tick;
ret->irq = values[5] / tick;
ret->softirq = values[6] / tick;
ret->steal = values[7] / tick;
ret->guest = values[8] / tick;
ret->guest_nice = values[9] / tick;
return 0;
}
static double sum_cpu_time(CpuTimes *t) {
double ret = 0.0;
ret += t->user;
ret += t->system;
ret += t->idle;
ret += t->nice;
ret += t->iowait;
ret += t->irq;
ret += t->softirq;
ret += t->steal;
ret += t->guest;
ret += t->guest_nice;
return ret;
}
static double
calc_cpu_busy_diff(CpuTimes *t1, CpuTimes *t2) {
double t1_all = sum_cpu_time(t1);
double t1_busy = t1_all - t1->idle;
double t2_all = sum_cpu_time(t2);
double t2_busy = t2_all - t2->idle;
if(t2_busy <= t1_busy)
return 0.0;
double busy_delta = t2_busy - t1_busy;
double all_delta = t2_all - t1_all;
double busy_perc = (busy_delta / all_delta) * 100;
return busy_perc;
}
static double
f_diff_percent(double f2, double f1, double all_delta) {
double field_delta = f2 - f1;
double field_perc;
if(all_delta <= 0)
field_perc = 0.0;
else
field_perc = (100*field_delta) / all_delta;
// https://code.google.com/p/psutil/issues/detail?id=392
#if defined(_WIN64) || defined(_WIN32) || defined(_WIN64)
if(field_perc > 100.0)
field_perc = 0.0;
if(field_perc < 0.0)
field_perc = 0.0;
#endif
return field_perc;
}
/* Public functions */
int
disk_usage(char path[], DiskUsage *ret)
{
struct statvfs s;
int r;
r = statvfs(path, &s);
check(r == 0, "Error in calling statvfs for %s", path);
ret->free = s.f_bavail * s.f_frsize;
ret->total = s.f_blocks * s.f_frsize;
ret->used = (s.f_blocks - s.f_bfree ) * s.f_frsize;
ret->percent = percentage(ret->used, ret->total);
return 0;
error:
return -1;
}
DiskPartitionInfo*
disk_partitions_phys()
{
FILE *fs = fopen("/proc/filesystems", "r");
check(fs, "Couldn't open /proc/filesystems");
char line[50];
int i, j;
int nparts = 5;
DiskPartition *partitions = calloc(nparts, sizeof(DiskPartition));
DiskPartitionInfo *ret = malloc(sizeof(DiskPartitionInfo));
DiskPartition *d = partitions;
check_mem(partitions);
check_mem(ret);
ret->nitems = 0;
ret->partitions = partitions;
int devs = 0;
char *phydevs[100];
while (fgets(line, 50, fs) != NULL) {
if (strncmp(line, "nodev", 5) != 0) {
phydevs[devs] = calloc(100, sizeof(char));
int start = 0, end = strlen(line)-1;
while (isspace(line[start])) start++;
while (isspace(line[end])) end--;
strncpy(phydevs[devs], line+start, (end+1)-start);
devs++;
}
}
fclose(fs);
DiskPartitionInfo *tmp = disk_partitions();
check(tmp, "disk_partitions failed");
for (i = 0;i < tmp->nitems; i++) {
DiskPartition *p = tmp->partitions + i;
bool nodev = true;
for(j = 0;j < devs; j++) {
if(strcmp(phydevs[j], p->fstype) == 0)
nodev = false;
}
if(strlen(p->device) == 0 || nodev) {
continue;
}
*d = *p;
d->device = strdup(p->device);
d->mountpoint = strdup(p->mountpoint);
d->fstype = strdup(p->fstype);
d->opts = strdup(p->opts);
ret->nitems ++;
d++;
if (ret->nitems == nparts) {
nparts *= 2;
partitions = realloc(partitions, sizeof(DiskPartition) * nparts);
check_mem(partitions);
ret->partitions = partitions;
d = ret->partitions + ret->nitems;
}
}
free_disk_partition_info(tmp);
return ret;
error:
free_disk_partition_info(tmp);
return NULL;
}
DiskPartitionInfo *
disk_partitions()
{
FILE *file = NULL;
struct mntent *entry;
int nparts = 5;
DiskPartition *partitions = (DiskPartition *)calloc(nparts, sizeof(DiskPartition));
DiskPartitionInfo *ret = (DiskPartitionInfo *)calloc(1, sizeof(DiskPartitionInfo));
DiskPartition *d = partitions;
check_mem(partitions);
check_mem(ret);
ret->nitems = 0;
ret->partitions = partitions;
file = setmntent(MOUNTED, "r");
check(file, "Couldn't open %s", MOUNTED);
while ((entry = getmntent(file))) {
d->device = strdup(entry->mnt_fsname);
d->mountpoint = strdup(entry->mnt_dir);
d->fstype = strdup(entry->mnt_type);
d->opts = strdup(entry->mnt_opts);
ret->nitems ++;
d++;
if (ret->nitems == nparts) {
nparts *= 2;
partitions = realloc(partitions, sizeof(DiskPartition) * nparts);
check_mem(partitions);
ret->partitions = partitions;
d = ret->partitions + ret->nitems; /* Move the cursor to the correct
value in case the realloc moved
the memory */
}
}
endmntent(file);
return ret;
error:
if (file)
endmntent(file);
free_disk_partition_info(ret);
return NULL;
}
void
free_disk_partition_info(DiskPartitionInfo *di)
{
DiskPartition *d = di->partitions;
while(di->nitems--) {
free(d->device);
free(d->mountpoint);
free(d->fstype);
free(d->opts);
d++;
}
free(di->partitions);
free(di);
}
DiskIOCounterInfo *
disk_io_counters()
{
const int sector_size = 512;
FILE *fp = fopen("/proc/partitions", "r");
check(fp, "Couldn't open /proc/partitions");
char *tmp;
int i = 0, nparts = 0;
size_t nmemb;
char *line = (char *)calloc(150, sizeof(char));
char **partitions = (char **)calloc(30, sizeof(char *));
DiskIOCounters *counters = NULL;
DiskIOCounters *ci = NULL;
DiskIOCounterInfo *ret = (DiskIOCounterInfo *)calloc(1, sizeof(DiskIOCounterInfo));
check_mem(line);
check_mem(partitions);
check_mem(ret);
while (fgets(line, 40, fp) != NULL) {
if (i++ < 2) {continue;}
tmp = strtok(line, " \n"); /* major number */
tmp = strtok(NULL, " \n"); /* minor number */
tmp = strtok(NULL, " \n"); /* Number of blocks */
tmp = strtok(NULL, " \n"); /* Name */
if (isdigit(tmp[strlen(tmp)-1])) { /* Only partitions (i.e. skip things like 'sda')*/
/* TBD: Skipping handling http://code.google.com/p/psutil/issues/detail?id=338 for now */
partitions[nparts] = strndup(tmp, 10);
check_mem(partitions[nparts]);
nparts++; /* TBD: We can't handle more than 30 partitions now */
}
}
fclose(fp);
nmemb = nparts;
counters = (DiskIOCounters *)calloc(nparts, sizeof(DiskIOCounters));
check_mem(counters);
ci = counters;
fp = fopen("/proc/diskstats", "r");
check(fp, "Couldn't open /proc/diskstats");
ret->iocounters = counters;
while (fgets(line, 120, fp) != NULL) {
tmp = strtok(line, " \n"); /* major number (skip) */
tmp = strtok(NULL, " \n"); /* minor number (skip) */
tmp = strtok(NULL, " \n"); /* name */
if (lfind(&tmp, partitions, &nmemb, sizeof(char *), str_comp)) {
ci->name = strdup(tmp);
check_mem(ci->name);
tmp = strtok(NULL, " \n"); /* reads completed successfully */
ci->reads = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* reads merged (skip)*/
tmp = strtok(NULL, " \n"); /* sectors read */
ci->readbytes = strtoul(tmp, NULL, 10) * sector_size;
tmp = strtok(NULL, " \n"); /* time spent reading */
ci->readtime = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* writes completed */
ci->writes = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* writes merged (skip)*/
tmp = strtok(NULL, " \n"); /* sectors written */
ci->writebytes = strtoul(tmp, NULL, 10) * sector_size;
tmp = strtok(NULL, " \n"); /* time spent writing */
ci->writetime = strtoul(tmp, NULL, 10);
ci++; /* TBD: Realloc here if necessary */
ret->nitems++;
}
}
for(i = 0; i < nparts; i++)
free(partitions[i]);
free(partitions);
free(line);
fclose(fp);
return ret;
error:
if (fp) fclose(fp);
if (line) free(line);
if (partitions) {
for(i = 0; i < nparts; i++)
free(partitions[i]);
free(partitions);
}
free_disk_iocounter_info(ret);
return NULL;
}
void
free_disk_iocounter_info(DiskIOCounterInfo *di)
{
DiskIOCounters *d = di->iocounters;
while (di->nitems--) {
free (d->name);
d++;
}
free(di->iocounters);
free(di);
}
NetIOCounterInfo *
net_io_counters()
{
FILE *fp = NULL;
NetIOCounterInfo *ret = (NetIOCounterInfo *)calloc(1, sizeof(NetIOCounterInfo));
NetIOCounters *counters = (NetIOCounters *)calloc(15, sizeof(NetIOCounters));
NetIOCounters *nc = counters;
int i = 0, ninterfaces = 0;
char *line = (char *)calloc(200, sizeof(char));
char *tmp = NULL;
check_mem(line);
check_mem(counters);
check_mem(ret);
fp = fopen("/proc/net/dev", "r");
check(fp, "Couldn't open /proc/net/dev");
while (fgets(line, 150, fp) != NULL) {
if (i++ < 2) continue;
ninterfaces++;
tmp = strtok(line, " \n:"); /* Name */
nc->name = strdup(tmp);
tmp = strtok(NULL, " \n"); /* Bytes received 0*/
nc->bytes_recv = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Packets received 1 */
nc->packets_recv = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Errors in 2 */
nc->errin = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Drops in 3 */
nc->dropin = strtoul(tmp, NULL, 10);
for (i = 0; i < 4; i++)
tmp = strtok(NULL, " \n"); /* Skip 4, 5, 6 and 7*/
tmp = strtok(NULL, " \n"); /* Bytes sent 8*/
nc->bytes_sent = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Packets sent 9*/
nc->packets_sent = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Errors out 9*/
nc->errout = strtoul(tmp, NULL, 10);
tmp = strtok(NULL, " \n"); /* Drops out 10*/
nc->dropout = strtoul(tmp, NULL, 10);
nc++;
}
fclose(fp);
free(line);
ret->iocounters = counters;
ret->nitems = ninterfaces;
return ret;
error:
/* TBD: ret not freed here */
if (fp) fclose(fp);
if (line) free(line);
if (counters) free(counters);
if (nc) free(nc);
return NULL;
}
void
free_net_iocounter_info(NetIOCounterInfo *d)
{
int i;
for (i=0; i < d->nitems; i++) {
free(d->iocounters[i].name);
}
free(d->iocounters);
free(d);
}
UsersInfo *
get_users ()
{
int nusers = 100;
UsersInfo *ret = (UsersInfo *)calloc(1, sizeof(UsersInfo));
Users *users = (Users *)calloc(nusers, sizeof(Users));
Users *u = users;
struct utmp *ut;
check_mem(ret);
check_mem(users);
ret->nitems = 0;
ret->users = users;
while (NULL != (ut = getutent())) {
if (ut->ut_type != USER_PROCESS)
continue;
u->username = strdup(ut->ut_user);
check_mem(u->username);
u->tty = strdup(ut->ut_line);
check_mem(u->username);
u->hostname = strdup(ut->ut_host);
check_mem(u->hostname);
u->tstamp = ut->ut_tv.tv_sec;
ret->nitems++;
u++;
if (ret->nitems == nusers) { /* More users than we've allocated space for. */
nusers *= 2;
users = realloc(users, sizeof(Users) * nusers);
check_mem(users);
ret->users = users;
u = ret->users + ret->nitems; /* Move the cursor to the correct
value in case the realloc moved
the memory */
}
}
endutent();
return ret;
error:
free_users_info(ret);
return NULL;
}
void
free_users_info(UsersInfo * ui)
{
Users *u = ui->users;
while (ui->nitems--) {
free(u->username);
free(u->tty);
free(u->hostname);
u++;
}
free(ui->users);
free(ui);
}
unsigned long int
get_boot_time()
{
FILE *fp = fopen("/proc/stat", "r");
char *line = (char *)calloc(200, sizeof(char));
char *tmp = NULL;
unsigned long ret = -1;
check(fp, "Couldn't open /proc/stat");
check_mem(line);
while (fgets(line, 150, fp)) {
if (strncmp(line, "btime", 5) == 0) {
strtok(line, " ");
tmp = strtok(NULL, "\n");
ret = strtoul(tmp, NULL, 10);
break;
}
}
check(ret != -1, "Couldn't find 'btime' line in /proc/stat");
fclose(fp);
free(line);
return ret;
error:
if (fp) fclose(fp);
if (line) free(line);
if (tmp) free(tmp);
return -1;
}
int
virtual_memory(VmemInfo *ret)
{
struct sysinfo info;
FILE *fp = NULL;
unsigned long long totalram, freeram, bufferram;
unsigned long long cached = -1, active = -1, inactive = -1;
char *line = (char *)calloc(50, sizeof(char));
check_mem(line);
check(sysinfo(&info) == 0, "sysinfo failed");
totalram = info.totalram * info.mem_unit;
freeram = info.freeram * info.mem_unit;
bufferram = info.bufferram * info.mem_unit;
fp = fopen("/proc/meminfo", "r");
check(fp, "Couldn't open /proc/meminfo");
while (fgets(line, 40, fp) != NULL) {
if (strncmp(line, "Cached:", 7) == 0){
strtok(line, ":"); /* Drop "Cached:" */
cached = strtoull(strtok(NULL, " "), NULL, 10);
}
if (strncmp(line, "Active:", 7) == 0){
strtok(line, ":"); /* Drop "Active:" */
active = strtoull(strtok(NULL, " "), NULL, 10);
}
if (strncmp(line, "Inactive:", 7) == 0){
strtok(line, ":"); /* Drop "Inactive:" */
inactive = strtoull(strtok(NULL, " "), NULL, 10);
}
}
if (cached == -1 || active == -1 || inactive == -1) {
log_warn("Couldn't determine 'cached', 'active' and 'inactive' memory stats. Setting them to 0");
cached = active = inactive = 0;
}
fclose(fp);
free(line);
ret->total = totalram;
ret->available = freeram + bufferram + cached;
ret->percent = percentage((totalram - ret->available), totalram);
ret->used = totalram - freeram;
ret->free = freeram;
ret->active = active;
ret->inactive = inactive;
ret->buffers = bufferram;
ret->cached = cached;
return 0;
error:
if(fp) fclose(fp);
if (line) free(line);
return -1;
}
int swap_memory(SwapMem *ret) {
struct sysinfo info;
FILE *fp = NULL;
unsigned long totalswap, freeswap, usedswap;
unsigned long sin = -1, sout = -1;
check(sysinfo(&info) == 0, "sysinfo failed");
totalswap = info.totalswap;
freeswap = info.freeswap;
usedswap = totalswap - freeswap;
fp = fopen("/proc/vmstat", "r");
check(fp, "Couldn't open /proc/vmstat");
char *line = (char *)calloc(50, sizeof(char));
check_mem(line);
while (fgets(line, 40, fp) != NULL) {
if(strncmp(line, "pswpin", 6) == 0) {
sin = strtoul(line+7, NULL, 10);
}
if (strncmp(line, "pswpout", 7) == 0){
sout = strtoul(line+8, NULL, 10);
}
}
if (sin == -1 || sout == -1) {
log_warn("Couldn't determine 'sin' and 'sout' swap stats. Setting them to 0");
sout = sin = 0;
}
fclose(fp);
free(line);
ret->total = totalswap;
ret->used = usedswap;
ret->free = freeswap;
ret->percent = percentage(usedswap, totalswap);
ret->sin = sin;
ret->sout = sout;
return 0;
error:
if(fp) fclose(fp);
if (line) free(line);
return -1;
}
int swap_memory(SwapMem *ret) {
struct sysinfo info;
FILE *fp = NULL;
unsigned long totalswap, freeswap, usedswap;
unsigned long sin = -1, sout = -1;
check(sysinfo(&info) == 0, "sysinfo failed");
totalswap = info.totalswap;
freeswap = info.freeswap;
usedswap = totalswap - freeswap;
fp = fopen("/proc/vmstat", "r");
check(fp, "Couldn't open /proc/vmstat");
char *line = (char *)calloc(50, sizeof(char));
check_mem(line);
while (fgets(line, 40, fp) != NULL) {
if(strncmp(line, "pswpin", 6) == 0) {
sin = strtoul(line+7, NULL, 10);
}
if (strncmp(line, "pswpout", 7) == 0){
sout = strtoul(line+8, NULL, 10);
}
}
if (sin == -1 || sout == -1) {
log_warn("Couldn't determine 'sin' and 'sout' swap stats. Setting them to 0");
sout = sin = 0;
}
fclose(fp);
free(line);
ret->total = totalswap;
ret->used = usedswap;
ret->free = freeswap;
ret->percent = percentage(usedswap, totalswap);
ret->sin = sin;
ret->sout = sout;
return 0;
error:
if(fp) fclose(fp);
if (line) free(line);
return -1;
}
int cpu_times(CpuTimes *ret) {
FILE *fp = NULL;
fp = fopen("/proc/stat", "r");
check(fp, "Couldn't open /proc/stat");
char *line = calloc(150, sizeof(char));
check_mem(line);
fgets(line, 140, fp);
int t = parse_proc_stat_line(line, ret);
check(t >= 0, "File /proc/stat is corrupted");
fclose(fp);
free(line);
return 0;
error:
if(fp) fclose(fp);
if (line) free(line);
return -1;
}
int
cpu_times_per_cpu(CpuTimes** ret) {
FILE *fp = NULL;
fp = fopen("/proc/stat", "r");
check(fp, "Couldn't open /proc/stat");
int t;
char *line = calloc(200, sizeof(char));
check_mem(line);
fgets(line, 190, fp); // skip first line
*ret = calloc(10, sizeof(CpuTimes));
check_mem(ret);
int cpus = 0;
while(1) {
fgets(line, 190, fp);
if(strncmp(line, "cpu", 3) != 0) break;