utmp.h

非常经典的加密算法

#ifndef _utmp_deslogind_h		/* sparc defines <utmp.h> _utmp_h */
#define _utmp_deslogind_h

/*
 * UTMP_FILE is defined in <utmp.h>.  A BSDI BSD/386 user claims that
 * _PATH_UTMP is necessary for his machine.
 */
#ifndef UTMP_FILE
#ifdef _PATH_UTMP
#define UTMP_FILE	_PATH_UTMP
#else
#define UTMP_FILE	"/etc/utmp"
#endif
#endif

#ifndef WTMP_FILE
#ifdef _PATH_WTMP
#define WTMP_FILE	_PATH_WTMP
#else
#define WTMP_FILE	"/etc/wtmp"
#endif
#endif

#if defined(__STDC__) || defined(__cplusplus)
extern int setlogin(char *ttydevicepath, char *username, char *rhost);
extern char *getLoginName(void);
#else
extern int setlogin();
extern char *getLoginName();		/* A non-utmp dependet getlogin() */
#endif

#endif