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#define _GNU_SOURCE
#include <stdio.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
char *getpass(const char *prompt)
{
int fd;
struct termios s, t;
ssize_t l;
static char password[128];
if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) return 0;
tcgetattr(fd, &t);
s = t;
t.c_lflag &= ~(ECHO|ISIG);
t.c_lflag |= ICANON;
t.c_iflag &= ~(INLCR|IGNCR);
t.c_iflag |= ICRNL;
tcsetattr(fd, TCSAFLUSH, &t);
tcdrain(fd);
dprintf(fd, "%s", prompt);
l = read(fd, password, sizeof password);
if (l >= 0) {
if (l > 0 && password[l-1] == '\n' || l==sizeof password) l--;
password[l] = 0;
}
tcsetattr(fd, TCSAFLUSH, &s);
dprintf(fd, "\n");
close(fd);
return l<0 ? 0 : password;
}
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