1 This file is shift.def, from which is created shift.c.
2 It implements the builtin "shift" in Bash.
4 Copyright (C) 1987-2003 Free Software Foundation, Inc.
6 This file is part of GNU Bash, the Bourne Again SHell.
8 Bash is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with Bash; see the file COPYING. If not, write to the Free Software
20 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
26 #if defined (HAVE_UNISTD_H)
28 # include <sys/types.h>
33 #include "../bashansi.h"
34 #include "../bashintl.h"
40 $FUNCTION shift_builtin
42 The positional parameters from $N+1 ... are renamed to $1 ... If N is
43 not given, it is assumed to be 1.
46 int print_shift_error;
48 /* Shift the arguments ``left''. Shift DOLLAR_VARS down then take one
49 off of REST_OF_ARGS and place it into DOLLAR_VARS[9]. If LIST has
50 anything in it, it is a number which says where to start the
51 shifting. Return > 0 if `times' > $#, otherwise 0. */
60 times = get_numeric_arg (list, 0);
63 return (EXECUTION_SUCCESS);
66 sh_erange (list ? list->word->word : NULL, _("shift count"));
67 return (EXECUTION_FAILURE);
69 else if (times > number_of_args ())
71 if (print_shift_error)
72 sh_erange (list ? list->word->word : NULL, _("shift count"));
73 return (EXECUTION_FAILURE);
79 free (dollar_vars[1]);
81 for (count = 1; count < 9; count++)
82 dollar_vars[count] = dollar_vars[count + 1];
87 dollar_vars[9] = savestring (temp->word->word);
88 rest_of_args = rest_of_args->next;
89 temp->next = (WORD_LIST *)NULL;
93 dollar_vars[9] = (char *)NULL;
95 return (EXECUTION_SUCCESS);