maint: update copyright

[gnulib.git] / lib / yesno.c

diff --git a/lib/yesno.c b/lib/yesno.c
index a705da7..ddb3445 100644 (file)
--- a/lib/yesno.c
+++ b/lib/yesno.c
@@ -1,10 +1,11 @@
 /* yesno.c -- read a yes/no response from stdin
-   Copyright (C) 1990 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   Copyright (C) 1990, 1998, 2001, 2003-2014 Free Software Foundation, Inc.
+
+   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 Free Software Foundation; either version 3 of the License, 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
@@ -12,26 +13,48 @@
    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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "yesno.h"
 
+#include <stdlib.h>
 #include <stdio.h>
 
-/* Read one line from standard input
-   and return nonzero if that line begins with y or Y,
-   otherwise return 0. */
+/* Return true if we read an affirmative line from standard input.
 
-int
-yesno ()
-{
-  int c;
-  int rv;
+   Since this function uses stdin, it is suggested that the caller not
+   use STDIN_FILENO directly, and also that the line
+   atexit(close_stdin) be added to main().  */
 
-  fflush (stderr);
-  c = getchar ();
-  rv = (c == 'y') || (c == 'Y');
-  while (c != EOF && c != '\n')
+bool
+yesno (void)
+{
+  bool yes;
+
+#if ENABLE_NLS
+  char *response = NULL;
+  size_t response_size = 0;
+  ssize_t response_len = getline (&response, &response_size, stdin);
+
+  if (response_len <= 0)
+    yes = false;
+  else
+    {
+      response[response_len - 1] = '\0';
+      yes = (0 < rpmatch (response));
+    }
+
+  free (response);
+#else
+  /* Test against "^[yY]", hardcoded to avoid requiring getline,
+     regex, and rpmatch.  */
+  int c = getchar ();
+  yes = (c == 'y' || c == 'Y');
+  while (c != '\n' && c != EOF)
     c = getchar ();
+#endif
 
-  return rv;
+  return yes;
 }