C ++ class used to obtain various system information in Linux

The following is the header file content, the code is part of the mooon, the corresponding CPP file, please directly browse: http://code.google.com/p/mooon/source/browse/trunk/common_library/src/sys/info.cpp

# Include <vector> # include "sys/config. h "SYS_NAMESPACE_BEGIN/*** is used to obtain various real-time information about the system, kernel, and process, such as CPU and memory data */class CInfo {public: /***** current real-time system information */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;/***** 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, 1 jiffies = 0.01 seconds uint64_t total; uint32_t user; /** indicates the running time of the user State from the system startup to the current time, excluding the nice value for the negative process */uint32_t nice; /** the CPU time occupied by processes with a negative nice value from system startup to the current time */uint32_t system, the running time in the core State */uint32_t idle;/** the wait time except the IO 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 system start to current time, hard interrupt time (2.6.0) */uint32_t softirq;/** indicates the Soft Interrupt time (2.6.0) * // uint32_t stealstolen from the start of the system to the current time; /** which is the time spent in other operating systems when running in a receivalized 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; /***** current system memory information */typedef struct {uint32_t mem_total; Memory mem_free; memory buffers; Memory cached; uint32_t swap_cached; swap_total; swap_free;} mem_info_t; /***** kernel version number */typedef struct {int16_t major;/** main version number */int16_t minor;/** Times version number (if the minor version number is an even number, then the kernel is a stable version; if it is an odd number, it is a development version) */int16_t revision;/** revision version */} kernel_version_t; /***** current process status information ** Process status value: 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 (shocould never be seen) Z Defunct ("zombie") process, terminated but not reaped by its parent. */typedef struct {/** 01 */pid_t pid;/** process number, which has the maximum value allowed, please check the name of the/proc/sys/kernel/pid_max * // ** 02 */char comm [FILENAME_MAX];/** process, path * // ** 03 */char state;/** Process status * // ** 04 */pid_t ppid; /** parent process Number */** 05 */pid_t pgrp;/** Process Group Number */** 06 */pid_t session; /** process session number * // ** 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 deleteen. 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 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; /***** network card Traffic Data Structure */typedef struct {/** 01 */char interface_name [INTERFACE_NAME_MAX];/*** Network Card Name, for example, eth0 * // ** receives data * // ** 02 */unsigned long receive_bytes; /** number of bytes received by this Nic * // ** 03 */unsigned long receive_packets;/** 04 */unsigned long receive_errors; /** 05 */unsigned long receive_dropped;/** 06 */unsigned long accept;/** 07 */unsigned long receive_frame;/** 08 */unsigned long receive_compressed; /** 09 */unsigned long receive_multicast;/** send data * // ** 10 */unsigned long transmit_bytes; /** number of bytes sent by this Nic * // ** 11 */unsigned long transmit_packets;/** 12 */unsigned long transmit_errors; /** 13 */unsigned long transmit_dropped;/** 14 */unsigned long queue;/** 15 */unsigned long transmit_collisions;/** 16 */unsigned long transmit_carrier; /** 17 */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;/** number of pages in shared memory */long text;/** number of pages in memory occupied by code segments */long lib; /** data/number of pages in the memory occupied by the stack segment */long data;/** number of pages in the memory occupied by the referenced database */} process_page_info_t; public:/** obtain system information, for details, refer to sys_info_t Description */static bool get_sys_info (sys_info_t & sys_info);/** to obtain memory information, for details, refer to the description of mem_info_t */static bool get_mem_info (mem_info_t & mem_info);/** to obtain the total CPU information, for details, see cpu_info_t Description */static bool get_cpu_info (cpu_info_t & cpu_info);/** to obtain all CPU information. For details, see cpu_info_t Description */static int get_cpu_info_array (std :: vector <cpu_info_t> & cpu_info_array);/** get the kernel version */static bool get_kernel_version (kernel_version_t & kernel_version);/** get process information, for details, refer to process_info_t Description */static bool get_process_info (process_info_t & process_info);/** to obtain the process page information, for details, see process_page_info_t Description */static bool get_process_page_info (process_page_info_t & process_page_info);/** get process running time data, for details, see process_time_t Description */static bool get_process_times (process_time_t & process_time ); /***** obtain Nic traffic and other information * traffic = (current value-value obtained in the previous time)/duration of the two intervals * @ interface_name: Nic name, for example, eth0 * @ net_info: stores 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_array);}; SYS_NAMESPACE_END

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