里面不能这样初始化吧？

    static const struct flock lck_set={F_WRLCK,SEEK_SET,0,0,0};
    static const struct flock lck_clr={F_UNLCK,SEEK_SET,0,0,0};

因FreeBSD里struct flock跟linux下的结构成员的顺序是不一样

FreeBSD里是：
     struct flock {
             off_t   l_start;        /* starting offset */
             off_t   l_len;          /* len = 0 means until end of file */
             pid_t   l_pid;          /* lock owner */
             short   l_type;         /* lock type: read/write, etc. */
             short   l_whence;       /* type of l_start */
     };

Linux下是：

         struct flock {
             ...
             short l_type;    /* Type of lock: F_RDLCK,
                                 F_WRLCK, F_UNLCK */
             short l_whence;  /* How to interpret l_start:
                                 SEEK_SET, SEEK_CUR, SEEK_END */
             off_t l_start;   /* Starting offset for lock */
             off_t l_len;     /* Number of bytes to lock */
             pid_t l_pid;     /* PID of process blocking our lock
                                 (F_GETLK only) */
             ...
         };
--
FROM 58.60.63.*