crsh v2.0

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

void parse_input(char **argv, char *cmdbuf){
    char argbuf[1000] = "",
         *abp = argbuf,
         **avp = argv,
         *cbp = cmdbuf;

    while(1){
        if(*cbp == ' ' || *cbp == '\n'){
            *avp = calloc(sizeof(char), 100);
            strcpy(*avp, argbuf);
            abp = argbuf;
            avp++;
            cbp++;
            continue;
        }

        if(*cbp == 0){
            *avp = 0;
            break;
        }

        *(abp++) = *(cbp++);
    }
}

void teardown_argv(char **argv){
    while(*argv)
        free(*(argv++));
}

int run_argv(char **argv){
    pid_t pid = fork();

    if(pid == 0){
        execvp(*argv, argv);
        perror("Error");
    } else {
        wait(0);
        teardown_argv(argv);
    }
}

int main(){
    char cmdbuf[1000] = "",
         *argv[100];

    while (1){
        printf("Crap Shell> ");
        fgets(cmdbuf, 1000, stdin);
        parse_input(argv, cmdbuf);
        run_argv(argv);
    }
}