cannot execute execl after fork - c

Question

My goal is to create N process child with one process father.
I am using two files.The first is named forkn.c which contains this code:
#include <sys/types.h>
#include <wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char* argv[] )
{
int status =4;
int i=1;
int wpid;
for (int cpt=0;cpt<atoi(argv[1]);cpt++)
{
if (i>0)
{
i=fork();
if(i>0)
printf("I create process number %d \n",cpt+1);
}
}
//The father process created argv [1] son ​​process. This ensures a single father and argv [1] son ​​process
if(i==0)
{
execl("~/tpBash/tp2/argv[2]","argv[2]",(char*) NULL);
}
if (i>0)
{
for(int cpt=0;cpt<atoi(argv[1]);cpt++)
{
wait(&status) ;
}
printf("I am the father, I waited all my son processes, I finished \n");
}
}
And there is the code of trait2.c:
#include <sys/types.h>
#include <wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main()
{
int status =4;
printf("I am the child process,my PID is : %d \n",getpid());
exit(status);
}
After i compile :
gcc -std=c99 forkn.c -o forkn
gcc -std=c99 trait2.c -o trait2
And then run the executable file :
./forkn 3 trait2
the first arguments is N (the number of child process to create ) and the second argument is the name of file to execute.
My problem is that the child process does not work.
Any idea please

Answer 1

The problem you are seeing is related to the way you're trying to do string interpolation:
execl("~/tpBash/tp2/argv[2]","argv[2]",(char*) NULL);
I suggest you try snprintf:
char buffer[ENOUGH];
snprintf(buffer, sizeof buffer, "%s/tpBash/.../...%s", home, argv[2]);
execl(buffer, argv[2]...);
Also, the second argument to execl should be argv[2] and not "argv[2]".