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 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 <http://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. */ 29static struct quoting_options *sh_quoting_options; 30 31/* Initializes the sh_quoting_options variable. */ 32static void 33init_sh_quoting_options () 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. */ 40size_t 41shell_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. */ 51char * 52shell_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. */ 61char * 62shell_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. */ 71char * 72shell_quote_argv (char **argv) 73{ 74 if (*argv != NULL) 75 { 76 char **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