1 /* Shell quoting.
2 Copyright (C) 2001-2002, 2004, 2009-2021 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2001.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #ifndef _SH_QUOTE_H
19 #define _SH_QUOTE_H
20
21 /* When passing a command to a shell, we must quote the program name and
22 arguments, since Unix shells interpret characters like " ", "'", "<", ">",
23 "$", '*', '?' etc. in a special way. */
24
25 #include <stdlib.h>
26
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 /* Returns the number of bytes needed for the quoted string. */
32 extern size_t shell_quote_length (const char *string);
33
34 /* Copies the quoted string to p and returns the incremented p.
35 There must be room for shell_quote_length (string) + 1 bytes at p. */
36 extern char * shell_quote_copy (char *restrict p, const char *string);
37
38 /* Returns the freshly allocated quoted string. */
39 extern char * shell_quote (const char *string)
40 _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
41 _GL_ATTRIBUTE_RETURNS_NONNULL;
42
43 /* Returns a freshly allocated string containing all argument strings, quoted,
44 separated through spaces. */
45 extern char * shell_quote_argv (const char * const *argv)
46 _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
47 _GL_ATTRIBUTE_RETURNS_NONNULL;
48
49 #ifdef __cplusplus
50 }
51 #endif
52
53 #endif /* _SH_QUOTE_H */