Forum Graph100

void execute(char *pathp)
{
    char command[128];//buffer for the command line
    char *args[64];//table of arguments
    int i;
    int numberofargs    =0;//no comment
    int    execres;
    int a        =0;
    int cline_size;//size of the command line

    cline_size=strlen(pathp);//cline_size is set
    if (cline_size > 128)//Error if the command line size is more than 128
    return;

    printf("nExecuting :n%sn", pathp);

    //This, below, scan the command line to find space characters
    for (i=0; i <= cline_size; i++)
    {
    if (pathp[i]!=(char)32)//if there is no space
    {
        if (a==0)//if it is the first character of the arg
        args[numberofargs]=&command[i];//copy the address of the first arg
        command[i]=pathp[i];//copy the arg in command
        a++;//a is increased till a space is found
    }
    else if (a > 0 && args[numberofargs][a - 1]!=(char)32)//if a space is found after
        //an argument and if the
        //previous character wasn't a
        //space
    {
        command[i]='';//this end the argument
        numberofargs++;//a new argument has been found
        a=0;//reset the index of character of the argument
    }
    }
    args[numberofargs + 1]=NULL;//This is for the last argument

    execres=execv(args[0], args);//execute the progs with the argument list

    if (execres==-1)//if error
    {

    perror("ERROR while executing");
    }

    bioskey(0);
    return;

}