man一下sysconf，解釋這個函數用來獲取系統執行的配置信息。例如頁大小、最大頁數、cpu個數、打開句柄的最大個數等等。詳細說明可以參考man，還可以寫個實例進行測試輸出，如下：

#include <stdio.h> #include <unistd.h>#define ONE_MB (1024 * 1024)int main() {printf("The number of processors configured is :%ld\n",sysconf(_SC_NPROCESSORS_CONF));printf("The number of processors currently online (available) is :%ld\n",sysconf(_SC_NPROCESSORS_ONLN));printf ("The pagesize: %ld\n", sysconf(_SC_PAGESIZE));printf ("The number of pages: %ld\n", sysconf(_SC_PHYS_PAGES));printf ("The number of available pages: %ld\n", sysconf(_SC_AVPHYS_PAGES));printf ("The memory size: %lld MB\n",(long long)sysconf(_SC_PAGESIZE) * (long long)sysconf(_SC_PHYS_PAGES) / ONE_MB );printf ("The number of files max opened:: %ld\n", sysconf(_SC_OPEN_MAX));printf("The number of ticks per second: %ld\n", sysconf(_SC_CLK_TCK));printf ("The max length of host name: %ld\n", sysconf(_SC_HOST_NAME_MAX));printf ("The max length of login name: %ld\n", sysconf(_SC_LOGIN_NAME_MAX));return 0; }

運行后輸出如下結果：

The number of processors configured is :4
The number of processors currently online (available) is :4
The pagesize: 4096
The number of pages: 2016183
The number of available pages: 173676
The memory size: 7875 MB
The number of files max opened:: 1048576
The number of ticks per second: 100
The max length of host name: 64
The max length of login name: 256

　　

轉載于:https://www.cnblogs.com/mazhimazhi/p/11367877.html

總結

以上是生活随笔為你收集整理的系统属性的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。