X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetpass.c;h=7367251e27ede214e7f04089216b55047cc34269;hb=083768e30add2d4c53372b98ae64092d1b97ee4b;hp=1ab621bcc80cc18e2cebda0a9b0dfd3bbb73600f;hpb=4589d52c7c039b9d9c9d7bec075f00c9d57ee6e1;p=gnulib.git

diff --git a/lib/getpass.c b/lib/getpass.c
index 1ab621bcc..7367251e2 100644
--- a/lib/getpass.c
+++ b/lib/getpass.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992,93,94,95,96,97,98,99,2000, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2001, 2003, 2004 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
@@ -13,17 +13,84 @@
 
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 #if HAVE_CONFIG_H
 # include <config.h>
 #endif
 
+#if !_LIBC
+# include "getpass.h"
+#endif
+
+#if _LIBC
+# define HAVE_STDIO_EXT_H 1
+#endif
+
+#include <stdbool.h>
+
 #include <stdio.h>
+#if HAVE_STDIO_EXT_H
+# include <stdio_ext.h>
+#else
+# define __fsetlocking(stream, type) /* empty */
+#endif
+#if !_LIBC
+# include "getline.h"
+#endif
+
 #include <termios.h>
 #include <unistd.h>
-#include "getline.h"
-#include "unlocked-io.h"
+
+#if _LIBC
+# include <wchar.h>
+#endif
+
+#if _LIBC
+# define NOTCANCEL_MODE "c"
+#else
+# define NOTCANCEL_MODE
+#endif
+
+#if _LIBC
+# define flockfile(s) _IO_flockfile (s)
+# define funlockfile(s) _IO_funlockfile (s)
+#elif 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
+
+#if _LIBC
+# include <bits/libc-lock.h>
+#else
+# define __libc_cleanup_push(function, arg) /* empty */
+# define __libc_cleanup_pop(execute) /* empty */
+#endif
+
+#if !_LIBC
+# define __getline getline
+# define __tcgetattr tcgetattr
+#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
@@ -34,12 +101,20 @@
 # 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;
-  int tty_changed;
+  bool tty_changed;
   static char *buf;
   static size_t bufsize;
   ssize_t nread;
@@ -47,18 +122,29 @@ getpass (const char *prompt)
   /* 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+" NOTCANCEL_MODE);
+  if (tty == NULL)
     {
       in = stdin;
       out = stderr;
     }
   else
-    out = in;
+    {
+      /* We do the locking ourselves.  */
+      __fsetlocking (tty, FSETLOCKING_BYCALLER);
+
+      out = in = tty;
+    }
+
+  /* Make sure the stream we opened is closed even if the thread is
+     canceled.  */
+  __libc_cleanup_push (call_fclose, tty);
+
+  flockfile (out);
 
   /* Turn echoing off if it is on now.  */
 
-  if (tcgetattr (fileno (in), &t) == 0)
+  if (__tcgetattr (fileno (in), &t) == 0)
     {
       /* Save the old one. */
       s = t;
@@ -67,14 +153,35 @@ getpass (const char *prompt)
       tty_changed = (tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &t) == 0);
     }
   else
-    tty_changed = 0;
+    tty_changed = false;
 
   /* Write the prompt.  */
-  fputs (prompt, out);
-  fflush (out);
+#ifdef USE_IN_LIBIO
+  if (_IO_fwide (out, 0) > 0)
+    __fwprintf (out, L"%s", prompt);
+  else
+#endif
+    fputs_unlocked (prompt, out);
+  fflush_unlocked (out);
 
   /* Read the password.  */
-  nread = getline (&buf, &bufsize, in);
+  nread = __getline (&buf, &bufsize, in);
+
+#if !_LIBC
+  /* As far as is known, glibc doesn't need this no-op fseek.  */
+
+  /* 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.  */
+  fseek (out, 0, SEEK_CUR);
+#endif
+
   if (buf != NULL)
     {
       if (nread < 0)
@@ -84,8 +191,15 @@ getpass (const char *prompt)
 	  /* Remove the newline.  */
 	  buf[nread - 1] = '\0';
 	  if (tty_changed)
-	    /* Write the newline that was not echoed.  */
-	    putc ('\n', out);
+	    {
+	      /* Write the newline that was not echoed.  */
+#ifdef USE_IN_LIBIO
+	      if (_IO_fwide (out, 0) > 0)
+		putwc_unlocked (L'\n', out);
+	      else
+#endif
+		putc_unlocked ('\n', out);
+	    }
 	}
     }
 
@@ -93,9 +207,11 @@ getpass (const char *prompt)
   if (tty_changed)
     (void) tcsetattr (fileno (in), TCSAFLUSH|TCSASOFT, &s);
 
-  if (in != stdin)
-    /* We opened the terminal; now close it.  */
-    fclose (in);
+  funlockfile (out);
+
+  __libc_cleanup_pop (0);
+
+  call_fclose (tty);
 
   return buf;
 }