Rado - Shell

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/wait.h>

char **parse_cmdline( const char *cmdline ){
    int command_count = 0;
    char * pch;
    char *copy = malloc(100);
    strcpy(copy, cmdline);
    pch = strtok(copy, " ");
    char **commands = malloc(sizeof(char)*500);
        while (pch != NULL){
            commands[command_count++] = pch;
            pch = strtok (NULL, " ,.-");
        }
        commands[command_count] = NULL;
        return commands;
}

int main(){
    char *buffer = malloc(100);
    int length = 0;
    int processes = 0;
    pid_t pid;
    int c;
    char **commands = malloc(sizeof(char)*500);
    while ((c = getchar()) != EOF){
        if(c == '\n'){
            commands = parse_cmdline(buffer);
            processes++;
            pid = fork();
            if(pid == 0){
                execv(commands[0] ,commands);
            }
            memset(buffer,0,strlen(buffer));
            length = 0;
        }
        else buffer[length++] = c;
    }
    for(int i = 0; i < processes; i++){
        wait(NULL);
    }

    free(buffer);
    return 0;
}