1 files changed, 107 insertions, 0 deletions
diff --git a/lib/sh-quote.c b/lib/sh-quote.c
new file mode 100644
index 0000000..2db6d0d
--- /dev/null
+++ b/lib/sh-quote.c
@@ -0,0 +1,107 @@
+/* Shell quoting.
+   Copyright (C) 2001-2004, 2006, 2009-2016 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "sh-quote.h"
+
+#include <string.h>
+
+#include "quotearg.h"
+#include "xalloc.h"
+
+/* Describes quoting for sh compatible shells.  */
+static struct quoting_options *sh_quoting_options;
+
+/* Initializes the sh_quoting_options variable.  */
+static void
+init_sh_quoting_options (void)
+{
+  sh_quoting_options = clone_quoting_options (NULL);
+  set_quoting_style (sh_quoting_options, shell_quoting_style);
+}
+
+/* Returns the number of bytes needed for the quoted string.  */
+size_t
+shell_quote_length (const char *string)
+{
+  if (sh_quoting_options == NULL)
+    init_sh_quoting_options ();
+  return quotearg_buffer (NULL, 0, string, strlen (string),
+                           sh_quoting_options);
+}
+
+/* Copies the quoted string to p and returns the incremented p.
+   There must be room for shell_quote_length (string) + 1 bytes at p.  */
+char *
+shell_quote_copy (char *p, const char *string)
+{
+  if (sh_quoting_options == NULL)
+    init_sh_quoting_options ();
+  return p + quotearg_buffer (p, (size_t)(-1), string, strlen (string),
+                              sh_quoting_options);
+}
+
+/* Returns the freshly allocated quoted string.  */
+char *
+shell_quote (const char *string)
+{
+  if (sh_quoting_options == NULL)
+    init_sh_quoting_options ();
+  return quotearg_alloc (string, strlen (string), sh_quoting_options);
+}
+
+/* Returns a freshly allocated string containing all argument strings, quoted,
+   separated through spaces.  */
+char *
+shell_quote_argv (char * const *argv)
+{
+  if (*argv != NULL)
+    {
+      char * const *argp;
+      size_t length;
+      char *command;
+      char *p;
+
+      length = 0;
+      for (argp = argv; ; )
+        {
+          length += shell_quote_length (*argp) + 1;
+          argp++;
+          if (*argp == NULL)
+            break;
+        }
+
+      command = XNMALLOC (length, char);
+
+      p = command;
+      for (argp = argv; ; )
+        {
+          p = shell_quote_copy (p, *argp);
+          argp++;
+          if (*argp == NULL)
+            break;
+          *p++ = ' ';
+        }
+      *p = '\0';
+
+      return command;
+    }
+  else
+    return xstrdup ("");
+}