1 /* Shell command argument quoting.
2 Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; see the file COPYING.
16 If not, write to the Free Software Foundation,
17 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19 /* Written by Paul Eggert <eggert@twinsun.com> */
25 #include <sys/types.h>
28 /* Place into QUOTED a quoted version of ARG suitable for `system'.
29 Return the length of the resulting string (which is not null-terminated).
30 If QUOTED is null, return the length without any side effects. */
33 quote_system_arg (quoted, arg)
40 /* Scan ARG, copying it to QUOTED if QUOTED is not null,
41 looking for shell metacharacters. */
49 /* ARG has no shell metacharacters. */
56 case '\t': case '\n': case ' ':
57 case '!': case '"': case '#': case '$': case '%': case '&': case '\'':
58 case '(': case ')': case '*': case ';':
59 case '<': case '>': case '?': case '[': case '\\':
60 case '^': case '`': case '|': case '~':
62 /* ARG has a shell metacharacter.
63 Start over, quoting it this time. */
68 /* If ARG is an option, quote just its argument.
69 This is not necessary, but it looks nicer. */
70 if (c == '-' && arg < a)
105 quoted[len + 1] = '\\';
106 quoted[len + 2] = '\'';