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| #include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/wait.h>
#include <sys/types.h>
using namespace std;
void exec_cmd(int *to_me, int *from_me, char* paramArray[])
{
if (dup2(to_me[0], STDIN_FILENO) == -1)
printf("Error dup2(to_me[0] child \n");
if (dup2(from_me[1], STDOUT_FILENO) == -1)
printf("Error dup2(from_me[1] child \n");
if (close(to_me[0]) == -1)
printf("Error close(to_me[0] child \n");
if (close(to_me[1]) == -1)
printf("Error close(to_me[1] child \n");
if (close(from_me[0]) == -1)
printf("Error close(from_me[0] child \n");
if (close(from_me[1]) == -1)
printf("Error close(from_me[1] child \n");
if (execvp(paramArray[0], paramArray) == -1)
printf("Error execvp(paramArray[0] child \n");
printf("Error exec_cmd, this message should not be displayed");
sleep(15);
exit(0);
}
int main()
{
string command;
string tmp;
int counter;
int i =0;
pid_t pid,pidchild ;
int status ;
int to_cmd[2], from_cmd[2];
int findStart;
int j= 0;
if (pipe(to_cmd) == -1)
printf("Error pipe to_cmd \n");
if (pipe(from_cmd) == -1)
printf("Error pipe from_cmd \n");
while (1)
{
cout << ">";
counter = 0;
getline(cin, command);
tmp =command;
while (tmp.find(" ") != -1)
{
counter++;
tmp = tmp.substr((tmp.find(" ") +1), (tmp.length() - tmp.find(" ") - 1));
//cout << tmp << endl;
}
counter++;
char** paramArray = new char*[counter+1];
while (command.find(" ") != -1)
{
int paramLenght = command.find(" ");
char* param = new char[paramLenght+1];
strcpy(param, command.substr(0, paramLenght).c_str());
paramArray[i] = param;
command = command.substr((paramLenght +1), (command.length() - paramLenght - 1));
i++;
}
int paramLenght = command.length();
char* param = new char[paramLenght+1];
strcpy(param, command.c_str());
paramArray[i] = param;
printf("I am parent PID %d\n ",getpid()) ;
switch(pid = fork())
{
case (pid_t)-1 :
perror("fatal error... ") ;
printf("Error pid_t \n");
exit(2) ;
case (pid_t)0 :
printf(" I am child PID=%d \n ",getpid()) ;
system("echo commande executed by child > /tmp/test/testprogsys.txt");
exec_cmd(to_cmd, from_cmd, paramArray);
default:
char bufferW[10000];
if (close(from_cmd[1]) == -1)
printf("Error close from_cmd[1] parent \n");
if (close(to_cmd[0]) == -1)
printf("Error close to_cmd[0] parent \n");
if (write(to_cmd[1], bufferW, sizeof bufferW) == -1)
printf("Error Write parent \n");
// Lire le résultat sur from_cmd[1]
//* Ces données sont celles que la commande a envoyé sur la sortie standard
char bufferR[10000];
if (read(from_cmd[0], bufferR, sizeof bufferR) == -1)
printf("Error read parent \n");
string output = bufferR;
while (j < output.length())
{
findStart = j;
while ((bufferR[j] != 0x0A) && (j != output.length())) j++;
cout << " >>" << output.substr(findStart, (j-findStart)) << endl;
j++;
}
i =0;
j =0;
findStart =0;
output.clear();
//printf("%s", bufferR);
if (close(to_cmd[0]) == -1)
printf("Error close to_cmd[0] parent \n");
if (close(from_cmd[1]) == -1)
printf("Error close from_cmd[1] parent \n");
pidchild = wait(NULL) ; /* attention adresse ! ! ! */
printf(" Death of child PID=%d\n ",pidchild) ;
}
}
return 0;
} |
