论坛徽章:: 0

电梯直达

1楼 [收藏(0)] [报告]

发表于 2011-11-02 14:23 |只看该作者 |倒序浏览

本帖最后由 yizhongchuanqi 于 2011-11-02 15:16 编辑

kernel中的acct.h文件里定义了一个结构体这里面的几个unused的变量什么时候可以用啊？有木有大侠知道的，小弟这种问题找不到合适的地方可以问所以发这来了
DESCRIPTION       top

   If the kernel is built with the process accounting option enabled
   (CONFIG_BSD_PROCESS_ACCT), then calling acct(2) starts process accounting, for
   example:

         acct("/var/log/pacct");

   When process accounting is enabled, the kernel writes a record to the
   accounting file as each process on the system terminates.  This record
   contains information about the terminated process, and is defined in
   <sys/acct.h> as follows:

         #define ACCT_COMM 16

         typedef u_int16_t comp_t;

         struct acct {
            char ac_flag;          /* Accounting flags */
            u_int16_t ac_uid;    /* Accounting user ID */
            u_int16_t ac_gid;    /* Accounting group ID */
            u_int16_t ac_tty;    /* Controlling terminal */
            u_int32_t ac_btime;    /* Process creation time
                                       (seconds since the Epoch) */
            comp_t ac_utime;    /* User CPU time */
            comp_t ac_stime;    /* System CPU time */
            comp_t ac_etime;    /* Elapsed time */
            comp_t ac_mem;    /* Average memory usage (kB) */
            comp_t ac_io;       /* Characters transferred (unused) */
            comp_t ac_rw;       /* Blocks read or written (unused) */
            comp_t ac_minflt; /* Minor page faults */
            comp_t ac_majflt; /* Major page faults */
            comp_t ac_swaps;    /* Number of swaps (unused) */
            u_int32_t ac_exitcode;  /* Process termination status
                                       (see wait(2)) */
            char    ac_comm[ACCT_COMM+1];
                                    /* Command name (basename of last
                                       executed command; null-terminated) */
            char    ac_pad[X]; /* padding bytes */
         };
原文链接http://www.kernel.org/doc/man-pages/online/pages/man5/acct.5.html

acct, linux, 内核, acct, linux, 内核