查看“BBS 会话信息”的源代码

BBS的用户相关的东西。这块非常复杂，分成好几个部分。

== UTMP ==

=== UTMPHEAD ===
<source lang="c">
struct UTMPHEAD {
    int next[USHM_SIZE];
    int hashhead[UTMP_HASHSIZE + 1];    /* use UCACHE_HASHSIZE/32 */
    int number;
    int listhead;
    int list_prev[USHM_SIZE];   /* sorted list prev ptr */
    int list_next[USHM_SIZE];   /* sorted list next ptr */
    time_t uptime;
};

static struct UTMPHEAD *utmphead;
</source>
utmphead其实指向一块shared memory，key = UTMP_SHMKEY

UTMPHEAD结构/数据由UtmpHead类处理，全都为GetXXX/SetXXX形式。

== utmp.c ==

; get_utmpshm_addr()
* Utmp.utmpshm

; longlock [(int signo)]
* inside Utmp.Lock()

; utmp_lock
* Utmp.Lock()

; utmp_unlock [(int fd)]
* Utmp.Unlock()

; utmp_setreadonly [(int readonly)]
* UtmpHead.SetReadOnly()

; detach_utmp
仅在WWW中使用。

; resolve_utmp
* Utmp.Init()

; utmp_hash [(const char *userid)]
* Utmp.Hash()

    logloop

; getnewutmpent [(struct user_info *up)]
* Utmp.GetNewUtmpEntry()

; getnewutmpent2 [(struct user_info *up)]
仅在WWW中使用。

    rebuild_list [(struct user_info *up, char *arg, int p)]
    apply_ulist [(APPLY_UTMP_FUNC fptr, void *arg)]
    apply_ulist_addr [(APPLY_UTMP_FUNC fptr, void *arg)]
    apply_utmpuid [(APPLY_UTMP_FUNC fptr, int uid, void *arg)]
    apply_utmp [(APPLY_UTMP_FUNC fptr, int maxcount,const char *userid, void *arg)]
    search_ulist [(struct user_info *uentp, int (*fptr) (int, struct user_info *), int farg)]

; clear_utmp2 [(int uent)]
* Utmp.Clear()

    clear_utmp [(int uent, int useridx, int pid)]

; get_utmp_number
* UtmpHead.GetNumber()

    get_utmpent [(int utmpnum)]
    get_utmpent_num [(struct user_info *uent)]
    cmpfuid [(const void*a,const void*b)]
    getfriendstr [(struct userec* user,struct user_info* puinfo)]
    myfriend [(int uid, char *fexp)]
    hisfriend [(int uid,struct user_info* him)]