C shell pipe operator not working properly

Question

I am doing a simple shell program in Linux. I am trying to implement the pipe operator for shell. I cant seem to find the problem and solution. The execvp didnt read from the previous pipe pipi. So if i do ls -l | more, the more prints bad usage instead of the list of files

Here is my code below.

• execCommands handles the commands.
• command.h parse the command.

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#include <wait.h>
#include "modules/token.h"
#include "modules/command.h"

#define BUFSIZE 10000

int tokenSize = 0;
int cmdSize = 0;
char promptSymbol[BUFSIZE] = "%";
char cwd[BUFSIZE];

// execute commands accordingly to the apropriate function
void execCommands(Command command[]){
    int fd = 0;
    char dir[BUFSIZE];
    pid_t pid, p2;
    int pipi[2];

    for(int i = 0;i < cmdSize;i++){
        //start executing commands
        if(strcmp(command[i].argv[0], "prompt") == 0){
            strcpy(promptSymbol, command[i].argv[1]);   //change prompt symbol
        }else if(strcmp(command[i].argv[0], "pwd") == 0){
            if(getcwd(cwd, sizeof(cwd)) != NULL){
                    printf("%s\n", cwd );
            }else{
                perror("getcwd() error\n");
            }
        }else if(strcmp(command[i].argv[0], "cd") == 0){
            if(command[i].argv[1] == NULL){
                strcpy(dir, "/home");
            }else if(strcmp(command[i].argv[1], "~") == 0 || strcmp(command[i].argv[1], "~/") == 0){
                strcpy(dir, "/home");
            }else{
                strcpy(dir, command[i].argv[1]);
            }

            if(chdir(dir) < 0){
                printf("No such directory/file %s found\n", dir);
            }
        }else{
            pid = fork();
            if(pid < 0){
                perror("pid fork failed\n");
            }
            
            if(pid == 0){
                if(command[i].stdin_file || command[i].stdout_file){
                    //check for stdin redirection
                    if(command[i].stdin_file){
                        fd = open(command[i].stdin_file, O_RDONLY);
                        dup2(fd, STDIN_FILENO);
                    }

                    //check for stdout redirection
                    if(command[i].stdout_file){
                        fd = open(command[i].stdout_file, O_WRONLY | O_CREAT, 0777);
                        dup2(fd, STDOUT_FILENO);
                    }
                }
            
                if(strcmp(command[i].sep,"|") == 0){
                    if(pipe(pipi) == -1){
                        perror("pipi pipe failed\n");
                    }

                    close(pipi[0]);
                    dup2(pipi[1], STDOUT_FILENO);
                    close(pipi[1]);
                    execvp(command[i].argv[0], command[i].argv);

                    p2 = fork();
                    if(p2 > 0){
                        close(pipi[1]);
                        dup2(pipi[0], STDIN_FILENO);
                        close(pipi[0]);
                        execvp(command[i].argv[0], command[i].argv);
                    }
                }else{
                    execvp(command[i].argv[0], command[i].argv);
                }
                close(fd);
                exit(0);
            }else{
                if(strcmp(command[i].sep, "&") != 0){
                    wait(0);
                }
            } // end of first fork()
        } //end of command check
    } //end of for loop
} //end of execCommands

//handles SIGINT, SIGTSTP and SIGQUIT
void handler(int num){
    printf("\nEnter 'exit' to end shell program\n");
}

main code

int main(){
    char cmdLine[BUFSIZE];
    char *token[BUFSIZE];
    Command command[BUFSIZE];

    //Runs untill user wants to exit
    while(strcmp(cmdLine, "exit") != 0){
        signal(SIGTSTP, handler);   //Ignores SIGTSTP signal(ctrl+z)
        signal(SIGINT, handler);    //Ignores SIGINT signal(ctrl+c)
        signal(SIGQUIT, handler);   //Ignores SIGQUIT signal(ctrl+\)
    
        //get current directory
        if(getcwd(cwd, sizeof(cwd)) != NULL){
            strcat(cwd, promptSymbol);
        }else{
            perror("getcwd error");
            return 1;
        }
        //prompts user for icommand
        printf("%s ", cwd);
        scanf(" %[^\n]", cmdLine);
        
        // split command line into tokens
        tokenSize = tokenise(cmdLine, token);
        
        //split the tokens into commands
        initCommand(command);
        cmdSize = seperateCommands(token, command);
    
        //execute commands accordingly
        execCommands(command);
        
    }
    return 0;
}