-/* Copyright (C) 1992,93,94,95,96,97,98,99,2000 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2001, 2003-2007, 2009-2014 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
- The GNU C Library is distributed in the hope that it will be useful,
+ This program 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
- Library General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, see <http://www.gnu.org/licenses/>. */
-#if HAVE_CONFIG_H
+#ifndef _LIBC
# include <config.h>
#endif
+#include "getpass.h"
+
#include <stdio.h>
-#include <termios.h>
-#include <unistd.h>
-#include "getline.h"
+
+#if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
+
+# include <stdbool.h>
+
+# if HAVE_DECL___FSETLOCKING && HAVE___FSETLOCKING
+# if HAVE_STDIO_EXT_H
+# include <stdio_ext.h>
+# endif
+# else
+# define __fsetlocking(stream, type) /* empty */
+# endif
+
+# if HAVE_TERMIOS_H
+# include <termios.h>
+# endif
+
+# 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
/* 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
+# ifndef TCSASOFT
+# define TCSASOFT 0
+# endif
+
+static void
+call_fclose (void *arg)
+{
+ if (arg != NULL)
+ fclose (arg);
+}
char *
-getpass (prompt)
- const char *prompt;
+getpass (const char *prompt)
{
+ FILE *tty;
FILE *in, *out;
struct termios s, t;
- int tty_changed;
+ bool tty_changed = false;
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+");
- if (in == NULL)
+ tty = fopen ("/dev/tty", "w+");
+ if (tty == NULL)
{
in = stdin;
out = stderr;
}
else
- out = in;
+ {
+ /* We do the locking ourselves. */
+ __fsetlocking (tty, FSETLOCKING_BYCALLER);
- /* Turn echoing off if it is on now. */
+ out = in = tty;
+ }
+
+ flockfile (out);
+ /* Turn echoing off if it is on now. */
+# if HAVE_TCGETATTR
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);
+ t.c_lflag &= ~(ECHO | ISIG);
+ tty_changed = (tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &t) == 0);
}
- else
- tty_changed = 0;
+# endif
/* Write the prompt. */
- fputs (prompt, out);
- fflush (out);
+ fputs_unlocked (prompt, out);
+ fflush_unlocked (out);
/* Read the password. */
nread = getline (&buf, &bufsize, in);
+
+ /* According to the C standard, input may not be followed by output
+ on the same stream without an intervening call to a file
+ positioning function. Suppose in == out; then without this fseek
+ call, on Solaris, HP-UX, AIX, OSF/1, the previous input gets
+ echoed, whereas on IRIX, the following newline is not output as
+ it should be. POSIX imposes similar restrictions if fileno (in)
+ == fileno (out). The POSIX restrictions are tricky and change
+ from POSIX version to POSIX version, so play it safe and invoke
+ fseek even if in != out. */
+ fseeko (out, 0, SEEK_CUR);
+
if (buf != NULL)
{
if (nread < 0)
- buf[0] = '\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. */
- putc ('\n', out);
- }
+ {
+ /* Remove the newline. */
+ buf[nread - 1] = '\0';
+ if (tty_changed)
+ {
+ /* Write the newline that was not echoed. */
+ putc_unlocked ('\n', out);
+ }
+ }
}
/* Restore the original setting. */
+# if HAVE_TCSETATTR
if (tty_changed)
- (void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s);
+ tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &s);
+# endif
+
+ funlockfile (out);
- if (in != stdin)
- /* We opened the terminal; now close it. */
- fclose (in);
+ call_fclose (tty);
return buf;
}
+
+#else /* W32 native */
+
+/* Windows implementation by Martin Lambers <marlam@marlam.de>,
+ improved by Simon Josefsson. */
+
+/* For PASS_MAX. */
+# include <limits.h>
+/* For _getch(). */
+# include <conio.h>
+/* For strdup(). */
+# include <string.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
projects / gnulib.git / blobdiff