实用技巧：“禁用”Linux终端输出的回显

#include 
#include 
#include 

#define PASSWORD_LEN 12

int main(){
struct termios initialrsettings, newrsettings;
char password[PASSWORD_LEN + 1];
tcgetattr(fileno(stdin),&initialrsettings); #获取termios结构并保存
newrsettings = initialrsettings;
newrsettings.c_lflag &= ~ECHO; #清除变量c_lflag中由ECHO定义的比特
printf("Please Enter Password:");
if( tcsetattr(fileno(stdin),TCSAFLUSH,&newrsettings) != 0 ){
fprintf(stderr,"Could not set arrributes\n");
}else{
fgets(password,PASSWORD_LEN,stdin);
tcsetattr(fileno(stdin),TCSANOW,&initialrsettings); #还原之前的termios结构
fprintf(stdout,"\nYou entered %s as the password\n",password);
}
exit(0);
}

Hardware:i686
OS:Linux (ubuntu desktop 7.10)
Release:2.6.22-14-generic
Version:#1 SMP Tue Feb 12 07:42:25 UTC 2008