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#include <termios.h>
#include <unistd.h>
#include <limits.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
static inline int _tcsetattr(int fd,int optional,struct termios *termios_p) {
int tmp;
for (;;) {
if ((tmp=tcsetattr(fd,optional,termios_p)))
if (errno==EINTR) continue;
break;
}
return tmp;
}
char *getpass(const char* prompt) {
struct termios old,tmp;
int out,in=open("/dev/tty",O_RDWR);
int doclose=(in>=0);
static char buf[PASS_MAX];
if (!doclose) { in=0; out=2; } else out=in;
if (!tcgetattr(in,&old)) {
tmp=old;
tmp.c_lflag &= ~(ECHO|ISIG);
_tcsetattr(in,TCSAFLUSH,&tmp);
}
write(out,prompt,strlen(prompt));
{
int nread,ofs=0;
for (;;) {
nread=read(in,buf+ofs,1);
if (nread<=0) {
if (errno==EINTR) continue;
buf[ofs]=0;
break;
} else if (ofs+nread>=PASS_MAX) {
buf[PASS_MAX-1]=0;
break;
} else if (buf[ofs]=='\n') {
buf[ofs+nread-1]=0;
break;
}
ofs+=nread;
}
write(out,"\n",1);
}
_tcsetattr(in,TCSAFLUSH,&old);
if (doclose) close(in);
return buf;
}
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