#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "getpass.h"
#include <stdio.h>
#if !defined _WIN32
#include <stdbool.h>
#if HAVE_STDIO_EXT_H
# include <stdio_ext.h>
#endif
#if !HAVE___FSETLOCKING
# define __fsetlocking(stream, type)
#endif
#if HAVE_TERMIOS_H
# include <termios.h>
#endif
#include "getline.h"
#if USE_UNLOCKED_IO
# include "unlocked-io.h"
#else
# if !HAVE_DECL_FFLUSH_UNLOCKED
# undef fflush_unlocked
# define fflush_unlocked(x) fflush (x)
# endif
# if !HAVE_DECL_FLOCKFILE
# undef flockfile
# define flockfile(x) ((void) 0)
# endif
# if !HAVE_DECL_FUNLOCKFILE
# undef funlockfile
# define funlockfile(x) ((void) 0)
# endif
# if !HAVE_DECL_FPUTS_UNLOCKED
# undef fputs_unlocked
# define fputs_unlocked(str,stream) fputs (str, stream)
# endif
# if !HAVE_DECL_PUTC_UNLOCKED
# undef putc_unlocked
# define putc_unlocked(c,stream) putc (c, stream)
# endif
#endif
#ifndef TCSASOFT
# define TCSASOFT 0
#endif
static void
call_fclose (void *arg)
{
if (arg != NULL)
fclose (arg);
}
char *
getpass (const char *prompt)
{
FILE *tty;
FILE *in, *out;
struct termios s, t;
bool tty_changed = false;
static char *buf;
static size_t bufsize;
ssize_t nread;
tty = fopen ("/dev/tty", "w+");
if (tty == NULL)
{
in = stdin;
out = stderr;
}
else
{
__fsetlocking (tty, FSETLOCKING_BYCALLER);
out = in = tty;
}
flockfile (out);
#if HAVE_TCGETATTR
if (tcgetattr (fileno (in), &t) == 0)
{
s = t;
t.c_lflag &= ~(ECHO | ISIG);
tty_changed = (tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &t) == 0);
}
#endif
fputs_unlocked (prompt, out);
fflush_unlocked (out);
nread = getline (&buf, &bufsize, in);
fseek (out, 0, SEEK_CUR);
if (buf != NULL)
{
if (nread < 0)
buf[0] = '\0';
else if (buf[nread - 1] == '\n')
{
buf[nread - 1] = '\0';
if (tty_changed)
{
putc_unlocked ('\n', out);
}
}
}
#if HAVE_TCSETATTR
if (tty_changed)
tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &s);
#endif
funlockfile (out);
call_fclose (tty);
return buf;
}
#else
#include <limits.h>
#ifndef PASS_MAX
# define PASS_MAX 512
#endif
char *
getpass (const char *prompt)
{
char getpassbuf[PASS_MAX + 1];
size_t i = 0;
int c;
if (prompt)
{
fputs (prompt, stderr);
fflush (stderr);
}
for (;;)
{
c = _getch ();
if (c == '\r')
{
getpassbuf[i] = '\0';
break;
}
else if (i < PASS_MAX)
{
getpassbuf[i++] = c;
}
if (i >= PASS_MAX)
{
getpassbuf[i] = '\0';
break;
}
}
if (prompt)
{
fputs ("\r\n", stderr);
fflush (stderr);
}
return strdup (getpassbuf);
}
#endif