mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/* Copyright (C) 1992-1999,2001,2003-2005,2011 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdio_ext.h>
|
|
#include <string.h> /* For string function builtin redirect. */
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include <wchar.h>
|
|
#define flockfile(s) _IO_flockfile (s)
|
|
#define funlockfile(s) _IO_funlockfile (s)
|
|
#include <bits/libc-lock.h>
|
|
|
|
/* It is desirable to use this bit on systems that have it.
|
|
The only bit of terminal state we want to twiddle is echoing, which is
|
|
done in software; there is no need to change the state of the terminal
|
|
hardware. */
|
|
|
|
#ifndef TCSASOFT
|
|
#define TCSASOFT 0
|
|
#endif
|
|
|
|
static void
|
|
call_fclose (void *arg)
|
|
{
|
|
if (arg != NULL)
|
|
fclose (arg);
|
|
}
|
|
|
|
char *
|
|
getpass (prompt)
|
|
const char *prompt;
|
|
{
|
|
FILE *in, *out;
|
|
struct termios s, t;
|
|
int tty_changed;
|
|
static char *buf;
|
|
static size_t bufsize;
|
|
ssize_t nread;
|
|
|
|
/* Try to write to and read from the terminal if we can.
|
|
If we can't open the terminal, use stderr and stdin. */
|
|
|
|
in = fopen ("/dev/tty", "w+ce");
|
|
if (in == NULL)
|
|
{
|
|
in = stdin;
|
|
out = stderr;
|
|
}
|
|
else
|
|
{
|
|
/* We do the locking ourselves. */
|
|
__fsetlocking (in, FSETLOCKING_BYCALLER);
|
|
|
|
out = in;
|
|
}
|
|
|
|
/* Make sure the stream we opened is closed even if the thread is
|
|
canceled. */
|
|
__libc_cleanup_push (call_fclose, in == out ? in : NULL);
|
|
|
|
flockfile (out);
|
|
|
|
/* Turn echoing off if it is on now. */
|
|
|
|
if (__tcgetattr (fileno (in), &t) == 0)
|
|
{
|
|
/* Save the old one. */
|
|
s = t;
|
|
/* Tricky, tricky. */
|
|
t.c_lflag &= ~(ECHO|ISIG);
|
|
tty_changed = (tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0);
|
|
}
|
|
else
|
|
tty_changed = 0;
|
|
|
|
/* Write the prompt. */
|
|
__fxprintf (out, "%s", prompt);
|
|
fflush_unlocked (out);
|
|
|
|
/* Read the password. */
|
|
nread = __getline (&buf, &bufsize, in);
|
|
if (buf != NULL)
|
|
{
|
|
if (nread < 0)
|
|
buf[0] = '\0';
|
|
else if (buf[nread - 1] == '\n')
|
|
{
|
|
/* Remove the newline. */
|
|
buf[nread - 1] = '\0';
|
|
if (tty_changed)
|
|
/* Write the newline that was not echoed. */
|
|
__fxprintf (out, "\n");
|
|
}
|
|
}
|
|
|
|
/* Restore the original setting. */
|
|
if (tty_changed)
|
|
(void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s);
|
|
|
|
funlockfile (out);
|
|
|
|
__libc_cleanup_pop (0);
|
|
|
|
if (in != stdin)
|
|
/* We opened the terminal; now close it. */
|
|
fclose (in);
|
|
|
|
return buf;
|
|
}
|