Thread: passing values

I need some help passing two variables to another program.

Code:

void create_process(char* prog_name, int userID, processID)
{
  // code
  // I need to convert the two int's to char to send them...??
  execl(prog_name, prog_name, userID, processID,0);
}

//
int main(int argc, char *argv[])
{
  int userID, processID;
  // convert argv[0] into userID and argv[1] into processID
  //code
}

From what I can figure out I need to convert userID and processID to char to be able to send then to another program and then I need to convert them back into int's again but I dont know how. Please help.

look up sprintf and snprintf.

Originally posted by vVv
Just in case you take your own function's name serious - it doesn't create a new process, the old one is just replaced (common mistake to assume otherwise) so when the program you execute exits, your process is gone, too. So make sure you fork( ) off a /real/ new process and have that call execl( ) (man 2 fork).

Yeah I've done the fork() thing

sscanf and sprintf seem to have done the trick thanks. Part of the problem is I thought argv[0] was the first element.

Another question, if I want to read what the user is typing on the keyboard what command(s) are recommended ?