third_party/ulib/musl/src/legacy/getpass.c

#define _GNU_SOURCE
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.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;
}