Add a "fork" of musl as //fusl.

fusl/src/legacy/getpass.c

+#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--;
+                password[l] = 0;
+        }
+
+        tcsetattr(fd, TCSAFLUSH, &s);
+
+        dprintf(fd, "\n");
+        close(fd);
+
+        return l<0 ? 0 : password;
+}