Compare text

Find the difference between two text files

Real-time editor

Hide whitespace changes

Hide unchanged lines

Disable line wrap

Layout

Diff precision

Text styles

Syntax highlighting

Diffchecker Desktop The most secure way to run Diffchecker. Get the Diffchecker Desktop app: your diffs never leave your computer!Get Desktop

Untitled diff

Created 11 years agoDiff never expires

219 removals

Lines
Total
Removed

Characters
Total
Removed

To continue using this feature, upgrade to Diffchecker Pro View Pricing

255 lines

143 additions

Lines
Total
Added

Characters
Total
Added

To continue using this feature, upgrade to Diffchecker Pro View Pricing

321 lines

* 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 3 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 even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License (GPL) for more details.

* You should have received a copy of the GNU GPL along with this

* program. If not, see <http://www.gnu.org/licenses/>.

// compile with "g++ -O3 -lrt netmon.cpp -o netmon"

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

#include <cstdio>

#include <cstring>

#include <cstdlib>

#include <ctime>

#include <climits>

#include <cctype>

#define STATE_FILE_BASE "/dev/shm/netmon"

int exitapp(int exitcode)

{

int exitapp(int exitcode) {

char errmsg[64];

sprintf(errmsg, "ERROR code %d", exitcode);

write(1, errmsg, strlen(errmsg));

exit(exitcode);

return exitcode;

}

int main(int argc, char** argv)

const int BLOCK_SIZE = 512;

{

if (argc < 2)

struct disk_stat {

{

long long read, write;

printf("usage: %s <network_interface> [CPU]\n", argv[0]);

double r_rate, w_rate;

char name[16];

};

const int MAX_STAT = 32;

class disk_stats {

disk_stat stat[MAX_STAT];

int total;

public:

disk_stats() : total(0) {}

const char* parse(const char* line, double seconds) {

if(total>=MAX_STAT) exitapp(11);

static char cad[256], buffer[256];

long long dummy;

disk_stat &ds = stat[total];

sscanf(line,"%lld %lld %s %lld %lld %lld %lld %lld %lld %lld",

&dummy,&dummy,ds.name,&dummy,&dummy,&ds.read,&dummy,&dummy,&dummy,&ds.write);

int len = strlen(ds.name);

if(!dummy) return 0;

if(isdigit(ds.name[len-1])) return 0;

long long prev_read = 0, prev_write = 0;

sprintf(cad,"%s.%s.%d",STATE_FILE_BASE,ds.name,getuid());

int fd = open(cad, O_RDWR | O_CREAT, 0664);

if (fd < 0) exitapp(9);

int bytes = read(fd, buffer, sizeof(buffer)-1);

if (bytes < 0) exitapp(10);

buffer[bytes] = 0;

sscanf(buffer,"%lld %lld",&prev_read,&prev_write);

lseek(fd, 0, SEEK_SET);

sprintf(buffer,"%lld %lld",ds.read,ds.write);

write(fd, buffer, 64);

close(fd);

ds.r_rate = (ds.read-prev_read)/seconds*BLOCK_SIZE/1024/1024;

ds.w_rate = (ds.write-prev_write)/seconds*BLOCK_SIZE/1024/1024;

if(ds.r_rate>0) {

if(ds.w_rate>0) sprintf(buffer," | %s: %3.0lf %3.0lf",ds.name,ds.r_rate,ds.w_rate);

else sprintf(buffer," | %s: %3.0lf .",ds.name,ds.r_rate);

} else {

if(ds.w_rate>0) sprintf(buffer," | %s: . %3.0lf",ds.name,ds.w_rate);

else sprintf(buffer," | %s: . .",ds.name);

}

++total;

return buffer;

}

};

int main(int argc, char** argv) {

if (argc < 2) {

printf("usage: %s <network_interface>\n", argv[0]);

return 1;

}

bool reportCPU = (argc > 2) && (strcmp(argv[2], "CPU") == 0);

char buffer[4096], cad[256], *ni, *nf;

// read network information

int fd = open("/proc/net/dev", O_RDONLY);

if (fd < 0) return exitapp(2);

int bytes = read(fd, buffer, sizeof(buffer)-1);

close(fd);

if (bytes < 0) return exitapp(3);

buffer[bytes] = 0;

timespec tp;

clock_gettime(CLOCK_MONOTONIC, &tp);

long long nanoseconds = tp.tv_sec * 1000000000LL + tp.tv_nsec;

long long recv_bytes=LLONG_MAX, sent_bytes=LLONG_MAX;

bool networkAvailable = false;

// search for the proper network interface

strcpy(cad, argv[1]);

strcat(cad, ":");

char *pif = strstr(buffer, cad);

if (pif != NULL)

if (pif) {

{

networkAvailable = true;

// jump to the received bytes field

ni = pif + strlen(cad);

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

*nf++ = 0;

// get the received bytes

recv_bytes = atoll(ni);

// jump to the sent bytes field

for (int skip = 0; skip < 8; skip++)

for (int skip = 0; skip < 8; skip++) {

{

ni = nf;

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

if (!*nf) break;

*nf++ = 0;

}

// get the sent bytes

sent_bytes = atoll(ni);

}

long long user_mode_time=0, user_mode_nice_time=0, system_mode_time=0, idle_time=0;

if (reportCPU)

{

// read CPU information

fd = open("/proc/stat", O_RDONLY);

if (fd < 0) return exitapp(4);

bytes = read(fd, buffer, sizeof(buffer)-1);

close(fd);

if (bytes < 0) return exitapp(5);

buffer[bytes] = 0;

pif = strstr(buffer, "cpu ");

if (pif != NULL)

if (pif) {

{

ni = pif + 3;

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

*nf++ = 0;

// get the user mode time

user_mode_time = atoll(ni);

ni = nf;

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

*nf++ = 0;

// get the user mode nice time

user_mode_nice_time = atoll(ni);

ni = nf;

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

*nf++ = 0;

// get the system mode time

system_mode_time = atoll(ni);

ni = nf;

while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;

for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);

*nf++ = 0;

// get the idle time

idle_time = atoll(ni);

}

// read the received/sent bytes, date and CPU usage stored by a previous execution

sprintf(cad, "%s.%s.%d", STATE_FILE_BASE, argv[1], getuid());

fd = open(cad, O_RDWR | O_CREAT, 0664);

if (fd < 0) return exitapp(6);

bytes = read(fd, buffer, sizeof(buffer)-1);

if (bytes < 0)

if (bytes < 0) {

{

close(fd);

return exitapp(7);

}

long long prev_recv_bytes, prev_sent_bytes, prev_nanoseconds = -1;

long long prev_recv_bytes = 0, prev_sent_bytes = 0, prev_nanoseconds = -1;

long long prev_user_mode_time, prev_user_mode_nice_time, prev_system_mode_time, prev_idle_time = -1;

long long prev_user_mode_time = 0, prev_user_mode_nice_time = 0, prev_system_mode_time = 0, prev_idle_time = -1;

if (bytes > 0)

if (bytes > 0) {

{

prev_recv_bytes = atoll(buffer);

prev_sent_bytes = atoll(buffer+20);

prev_nanoseconds = atoll(buffer+40);

prev_user_mode_time = atoll(buffer+60);

prev_user_mode_nice_time = atoll(buffer+80);

prev_system_mode_time = atoll(buffer+100);

prev_idle_time = atoll(buffer+120);

}

// store in the file the current values for later use

sprintf(buffer, "%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n",

recv_bytes, sent_bytes, nanoseconds,

user_mode_time, user_mode_nice_time, system_mode_time, idle_time);

lseek(fd, 0, SEEK_SET);

write(fd, buffer, 140);

close(fd);

// generate the result

strcpy(buffer, "<txt>");

Text moved with changes to lines 228-237 (91.8% similarity)

bool hasNet = networkAvailable && (prev_nanoseconds >= 0) && (recv_bytes >= prev_recv_bytes) && (sent_bytes >= prev_sent_bytes);

if (!networkAvailable)

{

sprintf(cad, " %s is down", argv[1]);

strcat(buffer, cad);

}

else if (!hasNet)

{

strcat(buffer, " ? kbps IN \n ? kbps OUT");

}

else

{

long long elapsed = nanoseconds - prev_nanoseconds;

if (elapsed < 1) elapsed = 1;

double seconds = elapsed / 1000000000.0;

Text moved with changes from lines 180-193 (91.8% similarity)

// NETWORK

bool hasNet = networkAvailable && (prev_nanoseconds >= 0) && (recv_bytes >= prev_recv_bytes) && (sent_bytes >= prev_sent_bytes);

if (!networkAvailable) {

sprintf(cad, " %s is down", argv[1]);

strcat(buffer, cad);

} else if (!hasNet) {

strcat(buffer, "D: - U: - ");

} else {

long long sent = sent_bytes - prev_sent_bytes;

long long received = recv_bytes - prev_recv_bytes;

long inbps = (long) (8 * received / seconds + 999); // adding 999 ensures "1" for any rate above 0

long inbps = (long) (8 * received / seconds + 999) / 8 / 1024; // adding 999 ensures "1" for any rate above 0

long outbps = (long) (8 * sent / seconds + 999);

long outbps = (long) (8 * sent / seconds + 999) / 8 / 1024;

if (inbps < 1000000)

sprintf(cad, "%6d kbps IN \n", inbps/1000);

if (inbps < 1024) sprintf(cad, "D: %5ld KB/s ", inbps);

else

else sprintf(cad, "D: %5.0lf MB/s ", inbps/1024.0);

sprintf(cad, "%6.3f Mbps IN \n", inbps/1000000.0);

strcat(buffer, cad);

if (outbps < 1000000)

if (outbps < 1024) sprintf(cad, " | U: %5ld KB/s ", outbps);

sprintf(cad, "%6d kbps OUT", outbps/1000);

else sprintf(cad, " | U: %5.0lf MB/s ", outbps/1024.0);

else

sprintf(cad, "%6.3f Mbps OUT", outbps/1000000.0);

strcat(buffer, cad);

}

long long cpu_used = user_mode_time + user_mode_nice_time + system_mode_time

- (prev_user_mode_time + prev_user_mode_nice_time + prev_system_mode_time);

long long total_cpu = cpu_used + (idle_time - prev_idle_time);

int total_ram = 0, ram_used = 0;

bool hasCPU = (prev_idle_time >= 0) && (total_cpu > 0);

if (reportCPU)

{

// CPU

if (!hasCPU)

if (!hasCPU) sprintf(cad, " | CPU: %3lld",total_cpu);

{

else sprintf(cad, " | CPU: %3.0lf%%", cpu_used * 100.0 / total_cpu);

strcat(buffer, "\n ? % CPU");

strcat(buffer, cad);

// RAM

FILE *meminfo = fopen("/proc/meminfo", "r");

if(meminfo) {

char line[256];

while(fgets(line, sizeof(line), meminfo)) {

if(!total_ram && sscanf(line, "MemTotal: %d kB", &total_ram));

if(sscanf(line, "Active: %d kB", &ram_used) == 1) {

sprintf(cad," | RAM: %5d MB",ram_used/1024);

break;

}

else

}

{

fclose(meminfo);

sprintf(cad, "\n %5.1f%% CPU", cpu_used * 100.0 / total_cpu);

if(!ram_used) sprintf(cad, " RAM: %5d MB",total_ram);

strcat(buffer,cad);

}

// DISK

FILE *diskstat = fopen("/proc/diskstats","rt");

disk_stats dss;

if(diskstat) {

char line[512];

while(fgets(line,sizeof(line),diskstat)) {

const char *cad = dss.parse(line,seconds);

if(!cad) continue;

strcat(buffer, cad);

}

fclose(diskstat);

}

strcat(buffer, "</txt><tool>");

if (networkAvailable && hasNet)

{

// TOOLTIPS

bool useNet = networkAvailable && hasNet;

if (useNet) {

sprintf(cad, " %s:\n %.2f MB received \n %.2f MB sent ",

argv[1], recv_bytes/1000000.0, sent_bytes/1000000.0);

argv[1], recv_bytes/1024.0/1024, sent_bytes/1024.0/1024);

strcat(buffer, cad);

}

if (reportCPU && hasCPU)

if (hasCPU) {

{

if (useNet) strcat(buffer, "\n");

if (networkAvailable && hasNet) strcat(buffer, "\n");

long long total_used_cpu = user_mode_time + user_mode_nice_time + system_mode_time;

sprintf(cad, " CPU usage:\n %5.1f%% since boot ",

sprintf(cad, " CPU usage:\n %5.1f%% since boot \n",

total_used_cpu * 100.0 / (total_used_cpu + idle_time));

strcat(buffer, cad);

}

sprintf(cad, " RAM usage:\n %5.1f%% of %d MB",

ram_used * 100.0 / total_ram, total_ram / 1024 );

strcat(buffer, cad);

strcat(buffer, "</tool>");

write(1, buffer, strlen(buffer));

return 0;

}

Saved diffs

Original text

Open file

/*
 * Copyright (C) 2010 Ciriaco Garcia de Celis
 *
 * 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 3 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 even the implied warranty of
 * MERCHANTABILITY  or  FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License (GPL) for more details.
 *
 * You should have received a copy of the GNU  GPL along with this
 * program. If not, see <http://www.gnu.org/licenses/>.
 */

// compile with "g++ -O3 -lrt netmon.cpp -o netmon"

#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <ctime>
#include <climits>

#define STATE_FILE_BASE "/dev/shm/netmon"

int exitapp(int exitcode)
{
    char errmsg[64];
    sprintf(errmsg, "ERROR code %d", exitcode);
    write(1, errmsg, strlen(errmsg));
    return exitcode;
}

int main(int argc, char** argv)
{
    if (argc < 2)
    {
         printf("usage: %s <network_interface> [CPU]\n", argv[0]);
         return 1;
    }

bool reportCPU = (argc > 2) && (strcmp(argv[2], "CPU") == 0);

char buffer[4096], cad[256], *ni, *nf;
    
    // read network information
    int fd = open("/proc/net/dev", O_RDONLY);
    if (fd < 0) return exitapp(2);
    int bytes = read(fd, buffer, sizeof(buffer)-1);
    close(fd);
    if (bytes < 0) return exitapp(3);
    buffer[bytes] = 0;

timespec tp;
    clock_gettime(CLOCK_MONOTONIC, &tp);
    long long nanoseconds = tp.tv_sec * 1000000000LL + tp.tv_nsec;

long long recv_bytes=LLONG_MAX, sent_bytes=LLONG_MAX;
    bool networkAvailable = false;

// search for the proper network interface
    strcpy(cad, argv[1]);
    strcat(cad, ":");
    char *pif = strstr(buffer, cad);
    if (pif != NULL)
    {
        networkAvailable = true;

// jump to the received bytes field
        ni = pif + strlen(cad);
        while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
        for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
        *nf++ = 0;

// get the received bytes
        recv_bytes = atoll(ni);

// jump to the sent bytes field
        for (int skip = 0; skip < 8; skip++)
        {
            ni = nf;
            while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
            for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
            if (!*nf) break;
            *nf++ = 0;
        }

// get the sent bytes
        sent_bytes = atoll(ni);
    }

long long user_mode_time=0, user_mode_nice_time=0, system_mode_time=0, idle_time=0;

if (reportCPU)
    {
        // read CPU information
        fd = open("/proc/stat", O_RDONLY);
        if (fd < 0) return exitapp(4);
        bytes = read(fd, buffer, sizeof(buffer)-1);
        close(fd);
        if (bytes < 0) return exitapp(5);
        buffer[bytes] = 0;

pif = strstr(buffer, "cpu ");
        if (pif != NULL)
        {
            ni = pif + 3;
            while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
            for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
            *nf++ = 0;

// get the user mode time
            user_mode_time = atoll(ni);

ni = nf;
            while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
            for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
            *nf++ = 0;

// get the user mode nice time
            user_mode_nice_time = atoll(ni);

ni = nf;
            while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
            for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
            *nf++ = 0;

// get the system mode time
            system_mode_time = atoll(ni);

ni = nf;
            while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
            for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
            *nf++ = 0;

// get the idle time
            idle_time = atoll(ni);
        }
    }

// read the received/sent bytes, date and CPU usage stored by a previous execution
    sprintf(cad, "%s.%s.%d", STATE_FILE_BASE, argv[1], getuid());
    fd = open(cad, O_RDWR | O_CREAT, 0664);
    if (fd < 0) return exitapp(6);
    bytes = read(fd, buffer, sizeof(buffer)-1);
    if (bytes < 0)
    {
        close(fd);
        return exitapp(7);
    }
    long long prev_recv_bytes, prev_sent_bytes, prev_nanoseconds = -1;
    long long prev_user_mode_time, prev_user_mode_nice_time, prev_system_mode_time, prev_idle_time = -1;
    if (bytes > 0)
    {
        prev_recv_bytes = atoll(buffer);
        prev_sent_bytes = atoll(buffer+20);
        prev_nanoseconds = atoll(buffer+40);
        prev_user_mode_time = atoll(buffer+60);
        prev_user_mode_nice_time = atoll(buffer+80);
        prev_system_mode_time = atoll(buffer+100);
        prev_idle_time = atoll(buffer+120);
    }

// store in the file the current values for later use
    sprintf(buffer, "%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n", 
        recv_bytes, sent_bytes, nanoseconds,
        user_mode_time, user_mode_nice_time, system_mode_time, idle_time);
    lseek(fd, 0, SEEK_SET);
    write(fd, buffer, 140);
    close(fd);

// generate the result

strcpy(buffer, "<txt>");

bool hasNet = networkAvailable && (prev_nanoseconds >= 0) && (recv_bytes >= prev_recv_bytes) && (sent_bytes >= prev_sent_bytes);

if (!networkAvailable)
    {
        sprintf(cad, "  %s is down", argv[1]);
        strcat(buffer, cad);
    }
    else if (!hasNet)
    {
        strcat(buffer, "     ? kbps IN \n     ? kbps OUT");
    }
    else
    {
        long long elapsed = nanoseconds - prev_nanoseconds;
        if (elapsed < 1) elapsed = 1;
        double seconds = elapsed / 1000000000.0;
        long long sent = sent_bytes - prev_sent_bytes;
        long long received = recv_bytes - prev_recv_bytes;
        long inbps = (long) (8 * received / seconds + 999); // adding 999 ensures "1" for any rate above 0
        long outbps = (long) (8 * sent / seconds + 999);
        if (inbps < 1000000)
            sprintf(cad, "%6d kbps IN \n", inbps/1000);
        else
            sprintf(cad, "%6.3f Mbps IN \n", inbps/1000000.0);
        strcat(buffer, cad);

if (outbps < 1000000)
            sprintf(cad, "%6d kbps OUT", outbps/1000);
        else
            sprintf(cad, "%6.3f Mbps OUT", outbps/1000000.0);
        strcat(buffer, cad);
        
    }

long long cpu_used = user_mode_time + user_mode_nice_time + system_mode_time
                       - (prev_user_mode_time + prev_user_mode_nice_time + prev_system_mode_time);
    long long total_cpu = cpu_used + (idle_time - prev_idle_time);
    bool hasCPU = (prev_idle_time >= 0) && (total_cpu > 0);
    if (reportCPU)
    {
        if (!hasCPU)
        {
            strcat(buffer, "\n     ?  % CPU");
        }
        else
        {
            sprintf(cad, "\n   %5.1f%% CPU", cpu_used * 100.0 / total_cpu);
            strcat(buffer, cad);
        }
    }

strcat(buffer, "</txt><tool>");

if (networkAvailable && hasNet)
    {
        sprintf(cad, " %s:\n    %.2f MB received \n    %.2f MB sent ",
                    argv[1], recv_bytes/1000000.0, sent_bytes/1000000.0);
        strcat(buffer, cad);
    }

if (reportCPU && hasCPU)
    {
        if (networkAvailable && hasNet) strcat(buffer, "\n");
        long long total_used_cpu = user_mode_time + user_mode_nice_time + system_mode_time;
        sprintf(cad, " CPU usage:\n    %5.1f%% since boot ",
                    total_used_cpu * 100.0 / (total_used_cpu + idle_time));
        strcat(buffer, cad);
    }

strcat(buffer, "</tool>");

write(1, buffer, strlen(buffer));

return 0;
}

Changed text

Open file

/* opyright (C) 2010 Ciriaco Garcia de Celis
 *
 * 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 3 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 even the implied warranty of
 * MERCHANTABILITY  or  FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License (GPL) for more details.
 *
 * You should have received a copy of the GNU  GPL along with this
 * program. If not, see <http://www.gnu.org/licenses/>.
 */

// compile with "g++ -O3 -lrt netmon.cpp -o netmon"

#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <ctime>
#include <climits>
#include <cctype>

#define STATE_FILE_BASE "/dev/shm/netmon"

int exitapp(int exitcode) {
  char errmsg[64];
  sprintf(errmsg, "ERROR code %d", exitcode);
  write(1, errmsg, strlen(errmsg));
  exit(exitcode);
  return exitcode;
}

const int BLOCK_SIZE = 512;

struct disk_stat {
    long long read, write;
    double r_rate, w_rate;
    char name[16];
};

const int MAX_STAT = 32;
class disk_stats {
    disk_stat stat[MAX_STAT];
    int total;
  public:
    disk_stats() : total(0) {}
    const char* parse(const char* line, double seconds) {
      if(total>=MAX_STAT) exitapp(11);
      static char cad[256], buffer[256];
      long long dummy;
      disk_stat &ds = stat[total];
      sscanf(line,"%lld %lld %s %lld %lld %lld %lld %lld %lld %lld",
             &dummy,&dummy,ds.name,&dummy,&dummy,&ds.read,&dummy,&dummy,&dummy,&ds.write);
      int len = strlen(ds.name);
      if(!dummy) return 0;
      if(isdigit(ds.name[len-1])) return 0;

long long prev_read = 0, prev_write = 0;
      sprintf(cad,"%s.%s.%d",STATE_FILE_BASE,ds.name,getuid());
      int fd = open(cad, O_RDWR | O_CREAT, 0664);
      if (fd < 0) exitapp(9);

int bytes = read(fd, buffer, sizeof(buffer)-1);
      if (bytes < 0) exitapp(10);
      buffer[bytes] = 0;

sscanf(buffer,"%lld %lld",&prev_read,&prev_write);
      lseek(fd, 0, SEEK_SET);
      sprintf(buffer,"%lld %lld",ds.read,ds.write);
      write(fd, buffer, 64);
      close(fd);

ds.r_rate = (ds.read-prev_read)/seconds*BLOCK_SIZE/1024/1024;
      ds.w_rate = (ds.write-prev_write)/seconds*BLOCK_SIZE/1024/1024;
      if(ds.r_rate>0) {
        if(ds.w_rate>0) sprintf(buffer," | %s: %3.0lf %3.0lf",ds.name,ds.r_rate,ds.w_rate);
        else sprintf(buffer," | %s: %3.0lf   .",ds.name,ds.r_rate);
      } else {
        if(ds.w_rate>0) sprintf(buffer," | %s:   . %3.0lf",ds.name,ds.w_rate);
        else sprintf(buffer," | %s:   .   .",ds.name);
      }

++total;
      return buffer;
    }
};

int main(int argc, char** argv) {
  if (argc < 2) {
    printf("usage: %s <network_interface>\n", argv[0]);
    return 1;
  }

char buffer[4096], cad[256], *ni, *nf;

// read network information
  int fd = open("/proc/net/dev", O_RDONLY);
  if (fd < 0) return exitapp(2);
  int bytes = read(fd, buffer, sizeof(buffer)-1);
  close(fd);
  if (bytes < 0) return exitapp(3);
  buffer[bytes] = 0;

timespec tp;
  clock_gettime(CLOCK_MONOTONIC, &tp);
  long long nanoseconds = tp.tv_sec * 1000000000LL + tp.tv_nsec;

long long recv_bytes=LLONG_MAX, sent_bytes=LLONG_MAX;
  bool networkAvailable = false;

// search for the proper network interface
  strcpy(cad, argv[1]);
  strcat(cad, ":");
  char *pif = strstr(buffer, cad);
  if (pif) {
    networkAvailable = true;

// jump to the received bytes field
    ni = pif + strlen(cad);
    while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
    for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
    *nf++ = 0;

// get the received bytes
    recv_bytes = atoll(ni);

// jump to the sent bytes field
    for (int skip = 0; skip < 8; skip++) {
      ni = nf;
      while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
      for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
      if (!*nf) break;
      *nf++ = 0;
    }

// get the sent bytes
    sent_bytes = atoll(ni);
  }

long long user_mode_time=0, user_mode_nice_time=0, system_mode_time=0, idle_time=0;

// read CPU information
  fd = open("/proc/stat", O_RDONLY);
  if (fd < 0) return exitapp(4);
  bytes = read(fd, buffer, sizeof(buffer)-1);
  close(fd);
  if (bytes < 0) return exitapp(5);
  buffer[bytes] = 0;

pif = strstr(buffer, "cpu ");
  if (pif) {
    ni = pif + 3;
    while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
    for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
    *nf++ = 0;

// get the user mode time
    user_mode_time = atoll(ni);

ni = nf;
    while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
    for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
    *nf++ = 0;

// get the user mode nice time
    user_mode_nice_time = atoll(ni);

ni = nf;
    while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
    for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
    *nf++ = 0;

// get the system mode time
    system_mode_time = atoll(ni);

ni = nf;
    while (*ni && ((*ni == ' ') || (*ni == '\t'))) ni++;
    for (nf = ni; *nf && (*nf != ' ') && (*nf != '\t'); nf++);
    *nf++ = 0;

// get the idle time
    idle_time = atoll(ni);
  }

// read the received/sent bytes, date and CPU usage stored by a previous execution
  sprintf(cad, "%s.%s.%d", STATE_FILE_BASE, argv[1], getuid());
  fd = open(cad, O_RDWR | O_CREAT, 0664);
  if (fd < 0) return exitapp(6);
  bytes = read(fd, buffer, sizeof(buffer)-1);
  if (bytes < 0) {
    close(fd);
    return exitapp(7);
  }
  long long prev_recv_bytes = 0, prev_sent_bytes = 0, prev_nanoseconds = -1;
  long long prev_user_mode_time = 0, prev_user_mode_nice_time = 0, prev_system_mode_time = 0, prev_idle_time = -1;
  if (bytes > 0) {
    prev_recv_bytes = atoll(buffer);
    prev_sent_bytes = atoll(buffer+20);
    prev_nanoseconds = atoll(buffer+40);
    prev_user_mode_time = atoll(buffer+60);
    prev_user_mode_nice_time = atoll(buffer+80);
    prev_system_mode_time = atoll(buffer+100);
    prev_idle_time = atoll(buffer+120);
  }

// store in the file the current values for later use
  sprintf(buffer, "%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n%019lld\n",
          recv_bytes, sent_bytes, nanoseconds,
          user_mode_time, user_mode_nice_time, system_mode_time, idle_time);
  lseek(fd, 0, SEEK_SET);
  write(fd, buffer, 140);
  close(fd);

// generate the result

strcpy(buffer, "<txt>");
  long long elapsed = nanoseconds - prev_nanoseconds;
  if (elapsed < 1) elapsed = 1;
  double seconds = elapsed / 1000000000.0;

// NETWORK
  bool hasNet = networkAvailable && (prev_nanoseconds >= 0) && (recv_bytes >= prev_recv_bytes) && (sent_bytes >= prev_sent_bytes);

if (!networkAvailable) {
    sprintf(cad, " %s is down", argv[1]);
    strcat(buffer, cad);
  } else if (!hasNet) {
    strcat(buffer, "D: -          U: -          ");
  } else {
    long long sent = sent_bytes - prev_sent_bytes;
    long long received = recv_bytes - prev_recv_bytes;
    long inbps = (long) (8 * received / seconds + 999) / 8 / 1024; // adding 999 ensures "1" for any rate above 0
    long outbps = (long) (8 * sent / seconds + 999) / 8 / 1024;

if (inbps < 1024) sprintf(cad, "D: %5ld KB/s ", inbps);
    else sprintf(cad, "D: %5.0lf MB/s ", inbps/1024.0);
    strcat(buffer, cad);

if (outbps < 1024) sprintf(cad, " | U: %5ld KB/s ", outbps);
    else sprintf(cad, " | U: %5.0lf MB/s ", outbps/1024.0);
    strcat(buffer, cad);

}

// CPU
  if (!hasCPU) sprintf(cad, " | CPU: %3lld",total_cpu);
  else sprintf(cad, " | CPU: %3.0lf%%", cpu_used * 100.0 / total_cpu);
  strcat(buffer, cad);

// RAM
  FILE *meminfo = fopen("/proc/meminfo", "r");
  if(meminfo) {
    char line[256];
    while(fgets(line, sizeof(line), meminfo)) {
      if(!total_ram && sscanf(line, "MemTotal: %d kB", &total_ram));
      if(sscanf(line, "Active: %d kB", &ram_used) == 1) {
        sprintf(cad," | RAM: %5d MB",ram_used/1024);
        break;
      }
    }
    fclose(meminfo);
    if(!ram_used) sprintf(cad, " RAM: %5d MB",total_ram);
    strcat(buffer,cad);
  }

// DISK
  FILE *diskstat = fopen("/proc/diskstats","rt");
  disk_stats dss;
  if(diskstat) {
    char line[512];
    while(fgets(line,sizeof(line),diskstat)) {
      const char *cad = dss.parse(line,seconds);
      if(!cad) continue;
      strcat(buffer, cad);
    }
    fclose(diskstat);
  }

strcat(buffer, "</txt><tool>");

// TOOLTIPS
  bool useNet = networkAvailable && hasNet;
  if (useNet) {
    sprintf(cad, " %s:\n    %.2f MB received \n    %.2f MB sent ",
            argv[1], recv_bytes/1024.0/1024, sent_bytes/1024.0/1024);
    strcat(buffer, cad);
  }

if (hasCPU) {
    if (useNet) strcat(buffer, "\n");
    long long total_used_cpu = user_mode_time + user_mode_nice_time + system_mode_time;
    sprintf(cad, " CPU usage:\n    %5.1f%% since boot \n",
            total_used_cpu * 100.0 / (total_used_cpu + idle_time));
    strcat(buffer, cad);
  }

sprintf(cad, " RAM usage:\n    %5.1f%% of %d MB",
          ram_used * 100.0 / total_ram, total_ram / 1024 );
  strcat(buffer, cad);

strcat(buffer, "</tool>");

write(1, buffer, strlen(buffer));

return 0;
}