Merge getpass with quote, plus my NEWS entry.

[wget] / lib / getpass.c

diff --git a/lib/getpass.c b/lib/getpass.c
new file mode 100644 (file)
index 0000000..208e21b
--- /dev/null
+++ b/lib/getpass.c
@@ -0,0 +1,231 @@
+/* Copyright (C) 1992-2001, 2003, 2004, 2005, 2006, 2007 Free Software
+   Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   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 3, or (at your option)
+   any later version.
+
+   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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _LIBC
+# include <config.h>
+#endif
+
+#include "getpass.h"
+
+#include <stdio.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
+
+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;
+
+  /* Try to write to and read from the terminal if we can.
+     If we can't open the terminal, use stderr and stdin.  */
+
+  tty = fopen ("/dev/tty", "w+");
+  if (tty == NULL)
+    {
+      in = stdin;
+      out = stderr;
+    }
+  else
+    {
+      /* We do the locking ourselves.  */
+      __fsetlocking (tty, FSETLOCKING_BYCALLER);
+
+      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);
+    }
+#endif
+
+  /* Write the prompt.  */
+  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';
+      else if (buf[nread - 1] == '\n')
+       {
+         /* 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)
+    tcsetattr (fileno (in), TCSAFLUSH | TCSASOFT, &s);
+#endif
+
+  funlockfile (out);
+
+  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