C + + classes for obtaining various system information under Linux

#include <vector> #include "sys/config.h" sys_namespace_begin/*** * To obtain various types of real-time information about systems, cores, and processes, such as CPU and memory data */class cinfo {public:/*** * System Current Real-time information */typedef struct {long uptime_sec             Ond  /* Seconds since boot */unsigned long average_load[3];        /* 1, 5, and 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;             /*** * Current Process time information */typedef struct {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; /*** * Current system CPU information */typedef struct {//unit: jiffies, 1jiffies=0.01 s uint64_t tot           Al    uint32_t user;    /** from the start of the system to the current time, in the user state run time, does not contain the Nice value is negative process */uint32_t nice;  /** from the start of the system start to the current moment, the nice value is negative the CPU time occupied by the process * */uint32_t system;    /** from the start of the system to accumulate to the current moment, in the nuclear mentality of the running time * * uint32_t idle;  /** from the start of the system to the current moment, in addition to the IO wait time wait time * * * uint32_t iowait;     /** from the start of the system to the current time, IO wait time (2.5.41) */uint32_t IRQ; /** from the start of the system to the current moment, hard interrupt Time (2.6.0) */uint32_t SOFTIRQ; /** from the start of the system to the current time, soft interrupt Time (2.6.0) *///uint32_t Stealstolen; /** which is the time spent in other operating systems when running in a virtualized environment (2.6.11) *///ui       nt32_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;           /*** * Current system memory information */typedef struct {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;    /*** * Kernel Version number */typedef struct {int16_t major;    /** Main Version number */int16_t minor; /** Minor Version number (if the minor version number is even, then the kernel is stable version, if the odd is the development version) */int16_t revision;               /** Revision number */}kernel_version_t; /*** * Process status information * * Status value of process: D uninterruptible sleep (usually IO) R Runni ng or runnable (on run queue) S interruptible sleep (waiting for a event to complete) T Stopped           , either by a job control signal or because it is being traced. W paging (not valid sinceThe 2.6.xx kernel) X dead (should never is seen) Z Defunct ("zombie") process, terminated but no         T reaped by its parent.                     */typedef struct {/** */pid_t pid;       /** the process number, its maximum allowable value, please see/proc/sys/kernel/pid_max *//** (*/char Comm[filename_max];                    The name of the/** process, excluding the path *//** */char state;                    Status of the/** process *//** */pid_t ppid;                    /** Parent Process Number *//** */pid_t pgrp;                 /** Process Group Number *//** */pid_t session;                    /** Process Session Number *//** */int tty_nr;                   /** The TTY the process uses * *//**/pid_t Tpgid;            /** The TTY the process uses *//** */unsigned int flags;          /** The kernel flags Word of the process (%lu before Linux 2.6.22) *//** */unsigned long minflt; /** the number of minor faults the process has made which had not required loading a MEmory page from disk *//** one */unsigned long cminflt;          /** the number of minor faults that the process ' s waited-for children has made *//**/unsigned long majflt;        /** the number of major faults the process has made which having required loading a memory page from disk */         /** */unsigned long cmajflt;           /** the number of major faults that the process ' s waited-for children has made *//**/unsigned long utime; /** the number of jiffies the This process have been scheduled in user mode *//** */unsigned long St           Ime                   /** the number of jiffies the This process have been scheduled in kernel mode *//** */long cutime; /** the number of jiffies that this process ' s waited-for children has been scheduled in user mode */*                   * * */long cstime; /** the number of jiffies that this process ' s waited-for children has been scheduled in kernel mode *//** */long priority;  /** the standard nice value, plus fifteen.                     The value is never negative in the kernel *//** */long nice;              /** the Nice value ranges from (nicest) to-19 (not nice to others) *//** */long num_threads;  /** number of threads in this process (since Linux 2.6).              Before kernel 2.6, this field is hard coded to 0 as a placeholder *//** */long itrealvalue; /** the time in Jiffies before the next sigalrm are sent to the process due to a interval timer.2.6.17, this field is n           o longer maintained, and is hard coded as 0 *//** * */long long starttime;           /** the time in jiffies the process started after system boot *//** */unsigned long vsize;                      /** Virtual Memory Size in bytes *//** */Long RSS; /** resident Set Size:number of pages The process have in real memory, minus 3 for administrative purPoses *//** */unsigned long rlim; /** current limit in bytes on the RSS of the process (usually 4294967295 on i386) *//**-*/unsigned long STARTC       Ode         /** the address above which program text can run *//** */unsigned long endcode;      /** the address below which program text can run *//** */unsigned long startstack;         /** the address of the start of the stack * */** */unsigned long kstkesp; /** the current value of ESP (stack pointer), as found in the kernel stack page for the process *//** */unsign         Ed Long Kstkeip;          /** the current EIP (instruction Pointer) *//** */unsigned long signal;         /** the bitmap of pending signals *//** */unsigned long blocked;       /** the bitmap of blocked signals *//** */unsigned long sigignore;        /** the bitmap of ignored signals *//**/unsigned long sigcatch; /** the bitmap of CaugHT Signals *//** */unsigned long nswap; /** number of pages swapped (not maintained).          *//** */unsigned long cnswap;               /** cumulative Nswap for child processes (not maintained) *//** PNS */int exit_signal;                 /** Signal to is sent to the parent when we die (since Linux 2.1.22) *//** */INT processor;               /** CPU number last executed on (since Linux 2.2.8) */}process_info_t;  /*** * NIC Traffic data structure */typedef struct {/** */char Interface_name[interface_name_max];/**             Network card name, such as Eth0 *//** Receive data *//** */unsigned long receive_bytes;           /** the number of bytes received by this NIC *//** */unsigned long receive_packets;           /** */unsigned long receive_errors;           /** * */unsigned long receive_dropped;           /** */unsigned long receive_fifo_errors;           /** */unsigned long receive_frame; /** */UnsigNed Long receive_compressed;                             /** * * * unsigned long receive_multicast;             /** Send data *//** */unsigned long transmit_bytes;           /** the number of bytes sent by this NIC *//** One */unsigned long transmit_packets;           /** */unsigned long transmit_errors;           /** */unsigned long transmit_dropped;           /** */unsigned long transmit_fifo_errors;           /** */unsigned long transmit_collisions;           /** */unsigned long transmit_carrier;               /** */unsigned long transmit_compressed;               }net_info_t;     /*** * Process Page Information structure */typedef struct {long size; /** Program Size */long resident;    /** resident Memory Space size */long share;     /** Shared Memory pages */long text;      /** code segment occupies memory page */long lib;     /** data/Stack segment occupies memory page */Long data;           /** Reference Library occupies memory pages */}process_page_info_t; Public:/** Get system Information, please refer to the description of sys_info_t */static bool get_sYs_info (sys_info_t& sys_info);               /** Get memory information, please refer to the description of mem_info_t */static bool Get_mem_info (mem_info_t& mem_info);               /** Get total CPU information, please refer to the description of cpu_info_t */static bool Get_cpu_info (cpu_info_t& cpu_info); /** get all CPU information, please refer to cpu_info_t description */static int get_cpu_info_array (std::vector<cpu_info_t>& cpu_info_array)               ;               /** get the kernel version number */static bool Get_kernel_version (kernel_version_t& kernel_version);               /** Get process information, please refer to the description of process_info_t */static bool Get_process_info (process_info_t& process_info); /** Get the Process page information, please refer to the description of process_page_info_t */static bool Get_process_page_info (process_page_info_t& Process_page_               info);                      /** get the process runtime data, please refer to the description of process_time_t */static bool Get_process_times (process_time_t& process_time);         /*** * Get information such as network card traffic * traffic = (currently acquired value-the value obtained at the last time)/length of two intervals * @interface_name: Network card name, such as eth0, etc. * @net_inFO: Storage network card traffic and other data * * static bool Get_net_info (const char* interface_name, net_info_t& net_info);               static bool Get_net_info_array (std::vector<net_info_t>& Net_info_array); private:static bool Do_get_net_info_array (const char* interface_name, std::vector<net_info_t>& net_info_a   Rray);           }; Sys_namespace_end

C + + classes for obtaining various system information under Linux