Imported from ../bash-4.0-rc1.tar.gz.

[platform/upstream/bash.git] / builtins / shift.def

diff --git a/builtins/shift.def b/builtins/shift.def
index 4d8fed0..3213086 100644 (file)
--- a/builtins/shift.def
+++ b/builtins/shift.def
@@ -1,41 +1,54 @@
 This file is shift.def, from which is created shift.c.
 It implements the builtin "shift" in Bash.
 
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+Copyright (C) 1987-2009 Free Software Foundation, Inc.
 
 This file is part of GNU Bash, the Bourne Again SHell.
 
-Bash 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 1, or (at your option) any later
-version.
+Bash 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 of the License, or
+(at your option) any later version.
 
-Bash 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.
+Bash 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 Bash; see the file COPYING.  If not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+You should have received a copy of the GNU General Public License
+along with Bash.  If not, see <http://www.gnu.org/licenses/>.
 
 $PRODUCES shift.c
 
-#if defined (HAVE_STRING_H)
-#  include <string.h>
-#else /* !HAVE_STRING_H */
-#  include <strings.h>
-#endif /* !HAVE_STRING_H */
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include "../bashansi.h"
+#include "../bashintl.h"
 
 #include "../shell.h"
+#include "common.h"
 
 $BUILTIN shift
 $FUNCTION shift_builtin
 $SHORT_DOC shift [n]
-The positional parameters from $N+1 ... are renamed to $1 ...  If N is
+Shift positional parameters.
+
+Rename the positional parameters $N+1,$N+2 ... to $1,$2 ...  If N is
 not given, it is assumed to be 1.
+
+Exit Status:
+Returns success unless N is negative or greater than $#.
 $END
 
+int print_shift_error;
+
 /* Shift the arguments ``left''.  Shift DOLLAR_VARS down then take one
    off of REST_OF_ARGS and place it into DOLLAR_VARS[9].  If LIST has
    anything in it, it is a number which says where to start the
@@ -44,34 +57,29 @@ int
 shift_builtin (list)
      WORD_LIST *list;
 {
-  int times, number;
-  WORD_LIST *args;
+  intmax_t times;
+  register int count;
+  WORD_LIST *temp;
 
-  times = get_numeric_arg (list);
+  if (get_numeric_arg (list, 0, &times) == 0)
+    return (EXECUTION_FAILURE);
 
-  if (!times)
+  if (times == 0)
     return (EXECUTION_SUCCESS);
-
-  if (times < 0)
+  else if (times < 0)
     {
-      builtin_error ("shift count must be >= 0");
+      sh_erange (list ? list->word->word : NULL, _("shift count"));
       return (EXECUTION_FAILURE);
     }
-
-  args = list_rest_of_args ();
-  number = list_length (args);
-  dispose_words (args);
-
-  if (times > number)
+  else if (times > number_of_args ())
     {
-      builtin_error ("shift count must be <= $#");
+      if (print_shift_error)
+       sh_erange (list ? list->word->word : NULL, _("shift count"));
       return (EXECUTION_FAILURE);
     }
 
   while (times-- > 0)
     {
-      register int count;
-
       if (dollar_vars[1])
        free (dollar_vars[1]);
 
@@ -80,8 +88,7 @@ shift_builtin (list)
 
       if (rest_of_args)
        {
-         WORD_LIST *temp = rest_of_args;
-
+         temp = rest_of_args;
          dollar_vars[9] = savestring (temp->word->word);
          rest_of_args = rest_of_args->next;
          temp->next = (WORD_LIST *)NULL;
@@ -90,6 +97,5 @@ shift_builtin (list)
       else
        dollar_vars[9] = (char *)NULL;
     }
-
   return (EXECUTION_SUCCESS);
 }