récupérer le nom du module et son pid

/*
 * Walk in lines and search within the lines for the name of the module
 */
#include <iostream>
#include <string>
using namespace std;

//pull apart module name ./mod16_*.x86
string modulo (string line){

    size_t first = line.find ("./");//first part of the string
    size_t last = line.find (" ",first);//Last part of the string

    if (first != string::npos && last != string::npos){
        return line.substr(first,last-first);
    }
    return "";//Not found
}

//Search pid in current line
string pid(string line){
    size_t first = 0;//first part of the string

    //Check if there are spaces at the beginning
    while (line [first++]!=' '){}

    size_t last = line.find (" ",first);//Last part of the string

    if (last != string::npos){
        return line.substr(first,last-1);
    }

    return "";
}

int main(int argc, char* argv[])
{
    string line="";
    //Example from  ps -aux| grep ttyUSB
/*
    string s="root      1194  0.2  0.0   6724   740 ?        S    10:06   0:09 ./mod16_video.x64 /dev/ttyUSB1 ul01 videocfgshr8162 9600 N81 \n\
    root      1195  0.1  0.0   6704   724 ?        S    10:06   0:06 ./mod16_modbus.x64 /dev/ttyUSB2 9600 N81 ul01 ./cfgmodbushfi.txt 2001 1 1 \n\
    axiome    5356  0.0  0.0   4504   740 pts/0    S+   11:04   0:00 sh -c ps -aux | grep ttyUSB 2>&1 \n\
    axiome    5358  0.0  0.0  14224  1012 pts/0    S+   11:04   0:00 grep ttyUSB \n";
*/

    //Example from  ps -ax| grep ttyUSB
    string s="\
     1194 ?        S      0:44 ./mod16_video.x64 /dev/ttyUSB1 ul01 videocfgshr8162 9600 N81\n\
 1195 ?        S      0:27 ./mod16_modbus.x64 /dev/ttyUSB2 9600 N81 ul01 ./cfgmodbushfi.txt 2001 1 1\n\
18022 pts/0    S+     0:00 grep --color=auto ttyUSB\n\
    ";


    for (auto c:s){ //Loop over string
        line+=c;
        if (c== '\n' ){//text line ending in \n

            if (line.find("ttyUSB")!= string::npos && line.find("mod16")!= string::npos){
                cout << modulo(line) << " pid = " << pid(line) << endl ;

            }

            line="";
        }
    }

    return 0;
}