获取主机基本信息

获取主机用户信息:

#include <sys/types.h>
#include <pwd.h>
#include <stdio.h>
#include <unistd.h>

int main(){
	uid_t uid;
	gid_t gid;

	struct passwd *pw;
	uid = getuid();
	gid = getgid();

	printf("User is %s\n",getlogin());

	printf("User IDs: uid=%d, gid=%d \n", uid, gid);

	pw = getpwuid(uid);
	printf("UID passwd entry: \n name=%s, uid=%d, gid=%d, home=%s, shell=%s\n",pw->pw_name, pw->pw_uid, pw->pw_gid, pw->pw_dir, pw->pw_shell);

	pw = getpwnam("root");
	printf("root passwd entry: \n");
	printf("name=%s, uid=%d, gid=%d, home=%s, shell=%s \n",pw->pw_name, pw->pw_uid, pw->pw_gid, pw->pw_dir, pw->pw_shell);
	exit(0);
}

获取主机自身信息:

#include <sys/utsname.h>
#include <unistd.h>
#include <stdio.h>


int main(){
	char computer[256];
	struct utsname uts;
	if(gethostname(computer, 255) != 0 || uname(&uts) < 0){
		fprintf(stderr, "Could not get host information \n");
		exit(1);
	}

	printf("Computer host name is %s \n",computer);
	printf("System is %s on %s hardware \n",uts.sysname, uts.machine);
	printf("Nodename is %s \n",uts.nodename);
	printf("Version is %s , %s \n",uts.release, uts.version);

	exit(0);
}