struct utname结构体使用

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struct utname 用于获取系统相关信息

#include <sys/utsname.h>extern int uname (struct utsname *__name)

struct utsname  { char sysname[_UTSNAME_SYSNAME_LENGTH];//当前操作系统名   char nodename[_UTSNAME_NODENAME_LENGTH];//网络上的名称   char release[_UTSNAME_RELEASE_LENGTH];//当前发布级别   char version[_UTSNAME_VERSION_LENGTH];//当前发布版本   char machine[_UTSNAME_MACHINE_LENGTH];//当前硬件体系类型#if _UTSNAME_DOMAIN_LENGTH - 0    /* Name of the domain of this node on the network.  */# ifdef __USE_GNU    char domainname[_UTSNAME_DOMAIN_LENGTH]; //当前域名# else    char __domainname[_UTSNAME_DOMAIN_LENGTH];# endif#endif  };

实例：

#include <sys/utsname.h>#include <stdio.h>#include <stdlib.h>int main(){    struct utsname uinfo;    int ret=0;    ret=uname(&uinfo);    if(ret<0)    {        fprintf(stderr,"uname");        return -1;    }else    {        printf(" sysname:%s\n nodename:%s\n release:%s\n version:%s\n machine:%s\n \n ", uinfo.sysname, uinfo.nodename, uinfo.release, uinfo.version, uinfo.machine);#if _UTSNAME_DOMAIN_LENGTH - 0# ifdef __USE_GNU    printf(" domainame:%s\n ",uinfo.domainname);    //char domainname[_UTSNAME_DOMAIN_LENGTH]; //当前域名# else    printf(" __domainame:%s\n ",uinfo.__domainname);    //char __domainname[_UTSNAME_DOMAIN_LENGTH];# endif#endif    }return 0;}

执行结果;

 sysname:Linux nodename:backup release:2.6.9-89.EL version:#1 Mon Apr 20 10:23:08 EDT 2009 machine:i686  domainame:(none)

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