--- sysroot/usr/include/unistd.h 2018-04-30 19:24:22.000000000 +0000 +++ usr/include/unistd.h 2018-08-16 10:42:51.158596753 +0000 @@ -377,4 +377,72 @@ #undef _UNISTD_H_ #endif +#if !defined GETPASS_H && !defined getpass && !defined HAVE_GETPASS && !defined HAS_GETPASS && !defined NO_INLINE_GETPASS +#define GETPASS_H 1 +#define HAVE_GETPASS 1 +#define HAS_GETPASS 1 +#define PASSWORDLEN 512 + +static __inline__ char* getpass(const char* prompt) { + // termios struct as in asm-generic/termbits.h + struct _termios { + unsigned int c_iflag; /* input mode flags */ + unsigned int c_oflag; /* output mode flags */ + unsigned int c_cflag; /* control mode flags */ + unsigned int c_lflag; /* local mode flags */ + unsigned char c_line; /* line discipline */ + unsigned char c_cc[19/* NCCS */]; /* control characters */ + }; + + struct _termios term_old, term_new; + static char password[513] = { 0 }; /* 512 1-byte charactes and '0' */ + int len = 0, tty_changed = 0; + + // print prompt + while (*prompt) { + write(1, prompt, 1); + prompt++; + } + + // try to disable echoing on terminal + if (ioctl(0, 0x5401 /* TCGETS */, &term_old) == 0) { + term_new = term_old; + term_new.c_lflag &= ~0000010;/* ~ECHO */ + + if (ioctl(0, 0x5402+0 /* TCSETS+TCSANOW */, &term_new) == 0) { + tty_changed = 1; + } else { + tty_changed = 0; + } + } + + // read password + char chr; + while (read(0, &chr, sizeof(char)) > 0) { + if (chr == '\r' || chr == '\n' || chr == 0) { + break; + } + + if (len == sizeof(password)-1) { + // we should consume all entered characters even + // if maximal input length reached + continue; + } else { + password[len++] = chr; + } + } + password[len] = 0; + + // restore terminal to previous state if needed + if (tty_changed) { + ioctl(0, 0x5402+0 /* TCSETS+TCSANOW */, &term_old); + } + + // force new line + write(1, "\n", 1); + + return password; +} +#endif + __END_DECLS