#ifndef _UNISTD_H
#define _UNISTD_H

#include <sys/types.h>

#ifdef __cplusplus
extern "C"
{
#endif

    extern char **environ;

    int execl(const char *pathname, const char *arg, ...);
    int execlp(const char *file, const char *arg, ...);
    int execle(const char *pathname, const char *arg, ...);
    int execv(const char *pathname, char *const argv[]);
    int execvp(const char *file, char *const argv[]);
    int execvpe(const char *file, char *const argv[], char *const envp[]);
    int execve(const char *pathname, char *const argv[], char *const envp[]);

    pid_t fork(void);

#ifdef __cplusplus
}
#endif
#endif