Linux下用來擷取各種系統資訊的C++類

#include

#include "sys/config.h"

SYS_NAMESPACE_BEGIN

/***

  * 用來擷取系統、核心和程序的各類實時資訊，如CPU和記憶體資料

  */

class CInfo

{

public:

    /***

      * 系統目前實時資訊

      */

    typedef struct

    {

        long uptime_second;             /* Seconds since boot */

        unsigned long average_load[3];  /* 1, 5, and 15 minute load averages */

        unsigned long ram_total;        /* Total usable main memory size */

        unsigned long ram_free;         /* Available memory size */

        unsigned long ram_shared;       /* Amount of shared memory */

        unsigned long ram_buffer;       /* Memory used by buffers */

        unsigned long swap_total;       /* Total swap space size */

        unsigned long swap_free;        /* swap space still available */

        unsigned short process_number;  /* Number of current processes */

    }sys_info_t;

      * 目前程序時間資訊

        long user_time;             /* user time */

        long system_time;          /* system time */

        long user_time_children;    /* user time of children */

        long system_time_children; /* system time of children */

    }process_time_t;

      * 目前系統CPU資訊

        // 機關: jiffies, 1jiffies=0.01秒

        uint64_t total;

        uint32_t user;    /** 從系統啟動開始累計到目前時刻，處于使用者态的運作時間，不包含 nice值為負程序 */

        uint32_t nice;    /** 從系統啟動開始累計到目前時刻，nice值為負的程序所占用的CPU時間 */

        uint32_t system;  /** 從系統啟動開始累計到目前時刻，處于核心态的運作時間 */

        uint32_t idle;    /** 從系統啟動開始累計到目前時刻，除IO等待時間以外的其它等待時間 */

        uint32_t iowait;  /** 從系統啟動開始累計到目前時刻，IO等待時間(2.5.41) */

        uint32_t irq;     /** 從系統啟動開始累計到目前時刻，硬中斷時間(2.6.0) */

        uint32_t softirq; /** 從系統啟動開始累計到目前時刻，軟中斷時間(2.6.0) */

        //uint32_t stealstolen; /** which is the time spent in other operating systems when running in a virtualized environment(2.6.11) */

        //uint32_t guest;       /** which is the time spent running a virtual  CPU  for  guest operating systems under the control of the Linux kernel(2.6.24) */

    }cpu_info_t;

      * 目前系統記憶體資訊

        uint32_t mem_total;

        uint32_t mem_free;

        uint32_t buffers;

        uint32_t cached;

        uint32_t swap_cached;

        uint32_t swap_total;

        uint32_t swap_free;

    }mem_info_t;

      * 核心版本号

        int16_t major;    /** 主版本号 */

        int16_t minor;    /** 次版本号(如果次版本号是偶數，那麼核心是穩定版；若是奇數則是開發版) */

        int16_t revision; /** 修訂版本号 */

    }kernel_version_t;

      * 當時程序狀态資訊

      *

      * 程序的狀态值:

        D    Uninterruptible sleep (usually IO)

        R    Running or runnable (on run queue)

        S    Interruptible sleep (waiting for an event to complete)

        T    Stopped, either by a job control signal or because it is being traced.

        W    paging (not valid since the 2.6.xx kernel)

        X    dead (should never be seen)

        Z    Defunct ("zombie") process, terminated but not reaped by its parent.

        /** 01 */ pid_t pid;                     /** 程序号，其允許的最大值，請檢視/proc/sys/kernel/pid_max */

        /** 02 */ char comm[FILENAME_MAX];       /** 程序的名字，不包括路徑 */

        /** 03 */ char state;                    /** 程序的狀态 */

        /** 04 */ pid_t ppid;                    /** 父程序号 */

        /** 05 */ pid_t pgrp;                    /** 程序組号 */

        /** 06 */ pid_t session;                 /** 程序會話号 */

        /** 07 */ int tty_nr;                    /** The tty the process uses */

        /** 08 */ pid_t tpgid;                   /** The tty the process uses */

        /** 09 */ unsigned int flags;            /** The kernel flags word of the process (%lu before Linux 2.6.22) */

        /** 10 */ unsigned long minflt;          /** The number of minor faults the process has made which have not required loading a memory page from disk */

        /** 11 */ unsigned long cminflt;         /** The number of minor faults that the process's waited-for children have made */

        /** 12 */ unsigned long majflt;          /** The number of major faults the process has made which have required loading a memory page from disk */

        /** 13 */ unsigned long cmajflt;         /** The number of major faults that the process's waited-for children have made */

        /** 14 */ unsigned long utime;           /** The number of jiffies that this process has been scheduled in user mode */

        /** 15 */ unsigned long stime;           /** The number of jiffies that this process has been scheduled in kernel mode */

        /** 16 */ long cutime;                   /** The  number  of  jiffies that this process's waited-for children have been scheduled in user mode */

        /** 17 */ long cstime;                   /** The number of jiffies that this process's waited-for children have been scheduled in kernel mode */

        /** 18 */ long priority;                 /** The standard nice value, plus fifteen.  The value is never negative in the kernel */

        /** 19 */ long nice;                     /** The nice value ranges from 19 (nicest) to -19 (not nice to others) */

        /** 20 */ long num_threads;              /** Number of threads in this process (since Linux 2.6).  Before kernel 2.6, this field was hard coded to 0 as a placeholder */

        /** 21 */ long itrealvalue;              /** The  time  in  jiffies before the next SIGALRM is sent to the process due to an interval timer.2.6.17, this field is no longer maintained, and is hard coded as 0 */

        /** 22 */ long long starttime;           /** The time in jiffies the process started after system boot */

        /** 23 */ unsigned long vsize;           /** Virtual memory size in bytes */

        /** 24 */ long rss;                      /** Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes */

        /** 25 */ unsigned long rlim;            /** Current limit in bytes on the rss of the process (usually 4294967295 on i386) */

        /** 26 */ unsigned long startcode;       /** The address above which program text can run */

        /** 27 */ unsigned long endcode;         /** The address below which program text can run */

        /** 28 */ unsigned long startstack;      /** The address of the start of the stack */

        /** 29 */ unsigned long kstkesp;         /** The current value of esp (stack pointer), as found in the kernel stack page for the process */

        /** 30 */ unsigned long kstkeip;         /** The current EIP (instruction pointer) */

        /** 31 */ unsigned long signal;          /** The bitmap of pending signals */

        /** 32 */ unsigned long blocked;         /** The bitmap of blocked signals */

        /** 33 */ unsigned long sigignore;       /** The bitmap of ignored signals */

        /** 34 */ unsigned long sigcatch;        /** The bitmap of caught signals */

        /** 35 */ unsigned long nswap;           /** Number of pages swapped (not maintained). */

        /** 36 */ unsigned long cnswap;          /** Cumulative nswap for child processes (not maintained) */

        /** 37 */ int exit_signal;               /** Signal to be sent to parent when we die (since Linux 2.1.22) */

        /** 38 */ int processor;                 /** CPU number last executed on (since Linux 2.2.8) */

    }process_info_t;

      * 網卡流量資料結構

        /** 01 */ char interface_name[INTERFACE_NAME_MAX]; /** 網卡名，如eth0 */

                  /** 接收資料 */

        /** 02 */ unsigned long receive_bytes;             /** 此網卡接收到的位元組數 */

        /** 03 */ unsigned long receive_packets;

        /** 04 */ unsigned long receive_errors;

        /** 05 */ unsigned long receive_dropped;

        /** 06 */ unsigned long receive_fifo_errors;

        /** 07 */ unsigned long receive_frame;

        /** 08 */ unsigned long receive_compressed;

        /** 09 */ unsigned long receive_multicast;

                  /** 發送資料 */

        /** 10 */ unsigned long transmit_bytes;             /** 此網卡已發送的位元組數 */

        /** 11 */ unsigned long transmit_packets;

        /** 12 */ unsigned long transmit_errors;

        /** 13 */ unsigned long transmit_dropped;

        /** 14 */ unsigned long transmit_fifo_errors;

        /** 15 */ unsigned long transmit_collisions;

        /** 16 */ unsigned long transmit_carrier;

        /** 17 */ unsigned long transmit_compressed;        

    }net_info_t;

      * 程序頁資訊結構

        long size;     /** 程式大小 */

        long resident; /** 常駐記憶體空間大小 */

        long share;    /** 共享記憶體頁數 */

        long text;     /** 代碼段占用記憶體頁數 */

        long lib;      /** 資料/堆棧段占用記憶體頁數 */

        long data;     /** 引用庫占用記憶體頁數 */

    }process_page_info_t;

    /** 擷取系統資訊，具體請參考sys_info_t的描述 */

    static bool get_sys_info(sys_info_t& sys_info);

    /** 擷取記憶體資訊，具體請參考mem_info_t的描述 */

    static bool get_mem_info(mem_info_t& mem_info);

    /** 擷取總CPU資訊，具體請參考cpu_info_t的描述 */

    static bool get_cpu_info(cpu_info_t& cpu_info);

    /** 擷取所有CPU資訊，具體請參考cpu_info_t的描述 */

    static int get_cpu_info_array(std::vector& cpu_info_array);

    /** 得到核心版本号 */

    static bool get_kernel_version(kernel_version_t& kernel_version);

    /** 擷取程序資訊，具體請參考process_info_t的描述 */

    static bool get_process_info(process_info_t& process_info);

    /** 擷取程序頁資訊，具體請參考process_page_info_t的描述 */

    static bool get_process_page_info(process_page_info_t& process_page_info);

    /** 擷取程序運作時間資料，具體請參考process_time_t的描述 */

    static bool get_process_times(process_time_t& process_time);

      * 擷取網卡流量等資訊

      * 流量 = (目前擷取的值 - 上一時間擷取的值) / 兩次間隔的時長

      * @interface_name: 網卡名，如eth0等

      * @net_info: 存儲網卡流量等資料

    static bool get_net_info(const char* interface_name, net_info_t& net_info);

    static bool get_net_info_array(std::vector& net_info_array);    

private:

    static bool do_get_net_info_array(const char* interface_name, std::vector& net_info_array);

};

SYS_NAMESPACE_END