1 /* Shell quoting. 2 Copyright (C) 2001-2004, 2006, 2009-2013 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. */ 29 static struct quoting_options *sh_quoting_options; 30 31 /* Initializes the sh_quoting_options variable. */ 32 static 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 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 * 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 * 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 * 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