1 /* Copyright (C) 1992-2001, 2003, 2004, 2005, 2006, 2007 Free Software
4 This file is part of the GNU C Library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
28 #if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
32 #if HAVE_DECL___FSETLOCKING && HAVE___FSETLOCKING
34 # include <stdio_ext.h>
37 # define __fsetlocking(stream, type) /* empty */
45 # include "unlocked-io.h"
47 # if !HAVE_DECL_FFLUSH_UNLOCKED
48 # undef fflush_unlocked
49 # define fflush_unlocked(x) fflush (x)
51 # if !HAVE_DECL_FLOCKFILE
53 # define flockfile(x) ((void) 0)
55 # if !HAVE_DECL_FUNLOCKFILE
57 # define funlockfile(x) ((void) 0)
59 # if !HAVE_DECL_FPUTS_UNLOCKED
60 # undef fputs_unlocked
61 # define fputs_unlocked(str,stream) fputs (str, stream)
63 # if !HAVE_DECL_PUTC_UNLOCKED
65 # define putc_unlocked(c,stream) putc (c, stream)
69 /* It is desirable to use this bit on systems that have it.
70 The only bit of terminal state we want to twiddle is echoing, which is
71 done in software; there is no need to change the state of the terminal
79 call_fclose (void *arg)
86 getpass (const char *prompt)
91 bool tty_changed = false;
93 static size_t bufsize;
96 /* Try to write to and read from the terminal if we can.
97 If we can't open the terminal, use stderr and stdin. */
99 tty = fopen ("/dev/tty", "w+");
107 /* We do the locking ourselves. */
108 __fsetlocking (tty, FSETLOCKING_BYCALLER);
115 /* Turn echoing off if it is on now. */
117 if (tcgetattr (fileno (in), &t) == 0)
119 /* Save the old one. */
121 /* Tricky, tricky. */
122 t.c_lflag &= ~(ECHO | ISIG);
123 tty_changed = (tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &t) == 0);
127 /* Write the prompt. */
128 fputs_unlocked (prompt, out);
129 fflush_unlocked (out);
131 /* Read the password. */
132 nread = getline (&buf, &bufsize, in);
134 /* According to the C standard, input may not be followed by output
135 on the same stream without an intervening call to a file
136 positioning function. Suppose in == out; then without this fseek
137 call, on Solaris, HP-UX, AIX, OSF/1, the previous input gets
138 echoed, whereas on IRIX, the following newline is not output as
139 it should be. POSIX imposes similar restrictions if fileno (in)
140 == fileno (out). The POSIX restrictions are tricky and change
141 from POSIX version to POSIX version, so play it safe and invoke
142 fseek even if in != out. */
143 fseeko (out, 0, SEEK_CUR);
149 else if (buf[nread - 1] == '\n')
151 /* Remove the newline. */
152 buf[nread - 1] = '\0';
155 /* Write the newline that was not echoed. */
156 putc_unlocked ('\n', out);
161 /* Restore the original setting. */
164 tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &s);
174 #else /* W32 native */
176 /* Windows implementation by Martin Lambers <marlam@marlam.de>,
177 improved by Simon Josefsson. */
187 # define PASS_MAX 512
191 getpass (const char *prompt)
193 char getpassbuf[PASS_MAX + 1];
199 fputs (prompt, stderr);
208 getpassbuf[i] = '\0';
211 else if (i < PASS_MAX)
218 getpassbuf[i] = '\0';
225 fputs ("\r\n", stderr);
229 return strdup (getpassbuf);