Custom shell is not recognizing the last command passed to it - c

Question

I am trying to implement a custom Unix shell, however, the last command being passed to it is never recognized. When I run a "ls" nothing happens but if i do "ls ls" it acts as if only one ls has been passed, or if i do "ls -o" it only does "ls" but if i do "ls -o -o" it does "ls -o", it should function similarly to a standard Unix shell.
#include "apue.h"
#include <sys/wait.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
int parse(char* buf, char **cmds);
static void sig_int(int);
int
main(void)
{
char *path;
path = getenv("PATH");
char buf[MAXLINE];
char *envp[] = {path, NULL};
pid_t pid;
int status;
char *command[MAXLINE];
char *input;
if (signal(SIGINT, sig_int) == SIG_ERR)
err_sys("signal error");
printf("%% ");
while (fgets(buf, MAXLINE, stdin) != NULL) {
parse(buf, command);
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid == 0) { /* child */
input = command[0];
execvpe(input, command, envp);
err_ret("couldn't execute: %s", buf);
exit(127);
}
/* parent */
if ((pid = waitpid(pid, &status, 0)) < 0)
err_sys("waitpid error");
printf("%% ");
}
exit(0);
}
/*parses input into something runable*/
int parse(char* buf, char **cmds)
{
char *sep;
int count;
count = 0;
while((sep = strchr(buf, ' ')))
{
cmds[count]= buf;
*sep = '\0';
buf = sep +1;
count++;
while (*buf && (*buf == ' ')) /* Ignore spaces */
buf++;
}
cmds[count] = NULL;
if(count == 0)
return 1;
return 0;
}