1 /* Shell quoting.
2 Copyright (C) 2001-2004, 2006 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 2, or (at your option)
8 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, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19 #include <config.h>
20
21 /* Specification. */
22 #include "sh-quote.h"
23
24 #include <string.h>
25
26 #include "quotearg.h"
27 #include "xalloc.h"
28
29 /* Describes quoting for sh compatible shells. */
30 static struct quoting_options *sh_quoting_options;
31
32 /* Initializes the sh_quoting_options variable. */
33 static void
init_sh_quoting_options()34 init_sh_quoting_options ()
35 {
36 sh_quoting_options = clone_quoting_options (NULL);
37 set_quoting_style (sh_quoting_options, shell_quoting_style);
38 }
39
40 /* Returns the number of bytes needed for the quoted string. */
41 size_t
shell_quote_length(const char * string)42 shell_quote_length (const char *string)
43 {
44 if (sh_quoting_options == NULL)
45 init_sh_quoting_options ();
46 return quotearg_buffer (NULL, 0, string, strlen (string),
47 sh_quoting_options);
48 }
49
50 /* Copies the quoted string to p and returns the incremented p.
51 There must be room for shell_quote_length (string) + 1 bytes at p. */
52 char *
shell_quote_copy(char * p,const char * string)53 shell_quote_copy (char *p, const char *string)
54 {
55 if (sh_quoting_options == NULL)
56 init_sh_quoting_options ();
57 return p + quotearg_buffer (p, (size_t)(-1), string, strlen (string),
58 sh_quoting_options);
59 }
60
61 /* Returns the freshly allocated quoted string. */
62 char *
shell_quote(const char * string)63 shell_quote (const char *string)
64 {
65 if (sh_quoting_options == NULL)
66 init_sh_quoting_options ();
67 return quotearg_alloc (string, strlen (string), sh_quoting_options);
68 }
69
70 /* Returns a freshly allocated string containing all argument strings, quoted,
71 separated through spaces. */
72 char *
shell_quote_argv(char ** argv)73 shell_quote_argv (char **argv)
74 {
75 if (*argv != NULL)
76 {
77 char **argp;
78 size_t length;
79 char *command;
80 char *p;
81
82 length = 0;
83 for (argp = argv; ; )
84 {
85 length += shell_quote_length (*argp) + 1;
86 argp++;
87 if (*argp == NULL)
88 break;
89 }
90
91 command = (char *) xmalloc (length);
92
93 p = command;
94 for (argp = argv; ; )
95 {
96 p = shell_quote_copy (p, *argp);
97 argp++;
98 if (*argp == NULL)
99 break;
100 *p++ = ' ';
101 }
102 *p = '\0';
103
104 return command;
105 }
106 else
107 return xstrdup ("");
108 }
109