1 /* Shell quoting.
2 Copyright (C) 2001-2004, 2006, 2009-2018 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 #include <config.h>
19
20 /* Specification. */
21 #include "sh-quote.h"
22
23 #include <string.h>
24
25 #include "quotearg.h"
26 #include "xalloc.h"
27
28 /* Describes quoting for sh compatible shells. */
29 static struct quoting_options *sh_quoting_options;
30
31 /* Initializes the sh_quoting_options variable. */
32 static void
init_sh_quoting_options(void)33 init_sh_quoting_options (void)
34 {
35 sh_quoting_options = clone_quoting_options (NULL);
36 set_quoting_style (sh_quoting_options, shell_quoting_style);
37 }
38
39 /* Returns the number of bytes needed for the quoted string. */
40 size_t
shell_quote_length(const char * string)41 shell_quote_length (const char *string)
42 {
43 if (sh_quoting_options == NULL)
44 init_sh_quoting_options ();
45 return quotearg_buffer (NULL, 0, string, strlen (string),
46 sh_quoting_options);
47 }
48
49 /* Copies the quoted string to p and returns the incremented p.
50 There must be room for shell_quote_length (string) + 1 bytes at p. */
51 char *
shell_quote_copy(char * p,const char * string)52 shell_quote_copy (char *p, const char *string)
53 {
54 if (sh_quoting_options == NULL)
55 init_sh_quoting_options ();
56 return p + quotearg_buffer (p, (size_t)(-1), string, strlen (string),
57 sh_quoting_options);
58 }
59
60 /* Returns the freshly allocated quoted string. */
61 char *
shell_quote(const char * string)62 shell_quote (const char *string)
63 {
64 if (sh_quoting_options == NULL)
65 init_sh_quoting_options ();
66 return quotearg_alloc (string, strlen (string), sh_quoting_options);
67 }
68
69 /* Returns a freshly allocated string containing all argument strings, quoted,
70 separated through spaces. */
71 char *
shell_quote_argv(char * const * argv)72 shell_quote_argv (char * const *argv)
73 {
74 if (*argv != NULL)
75 {
76 char * const *argp;
77 size_t length;
78 char *command;
79 char *p;
80
81 length = 0;
82 for (argp = argv; ; )
83 {
84 length += shell_quote_length (*argp) + 1;
85 argp++;
86 if (*argp == NULL)
87 break;
88 }
89
90 command = XNMALLOC (length, char);
91
92 p = command;
93 for (argp = argv; ; )
94 {
95 p = shell_quote_copy (p, *argp);
96 argp++;
97 if (*argp == NULL)
98 break;
99 *p++ = ' ';
100 }
101 *p = '\0';
102
103 return command;
104 }
105 else
106 return xstrdup ("");
107 }
108