reuse code from legacy parser

grub-core/commands/menuentry.c

@@ -24,6 +24,7 @@
 #include <grub/extcmd.h>
 #include <grub/i18n.h>
 #include <grub/normal.h>
+#include <grub/script_sh.h>
 
 static const struct grub_arg_option options[] =
   {
@@ -221,26 +222,17 @@ setparams_prefix (int argc, char **args)
     return 0;
 
   grub_strcpy (result, "setparams");
-  i = 9;
+  p = result + 9;
 
   for (j = 0; j < argc; j++)
     {
-      result[i++] = ' ';
-      result[i++] = '\'';
-      p = args[j];
-      while (*p) {
-	result[i++] = *p;
-	if (*p == '\'') {
-	  result[i++] = '\\';
-	  result[i++] = '\'';
-	  result[i++] = '\'';
-	}
-	p++;
-      }
-      result[i++] = '\'';
+      *p++ = ' ';
+      *p++ = '\'';
+      p = grub_script_escape_squotes (p, args[j], grub_strlen (args[j]));
+      *p++ = '\'';
     }
-  result[i++] = '\n';
-  result[i] = '\0';
+  *p++ = '\n';
+  *p = '\0';
   return result;
 }
 

grub-core/lib/legacy_parse.c

@@ -20,6 +20,7 @@
 #include <grub/misc.h>
 #include <grub/mm.h>
 #include <grub/err.h>
+#include <grub/script_sh.h>
 #include <grub/legacy_parse.h>
 #include <grub/i386/pc/vesa_modes_table.h>
 
@@ -323,30 +324,16 @@ char *
 grub_legacy_escape (const char *in, grub_size_t len)
 {
   const char *ptr;
-  char *ret, *outptr;
+  char *outptr;
   int overhead = 0;
   for (ptr = in; ptr < in + len && *ptr; ptr++)
     if (*ptr == '\'')
       overhead += 3;
-  ret = grub_malloc (ptr - in + overhead + 1);
-  if (!ret)
+  outptr = grub_malloc (ptr - in + overhead + 1);
+  if (!outptr)
     return NULL;
-  outptr = ret;
-  for (ptr = in; ptr < in + len && *ptr; ptr++)
-    {
-      if (*ptr == '\'')
-	{
-	  *outptr++ = '\'';
-	  *outptr++ = '\\';
-	  *outptr++ = '\'';
-	  *outptr++ = '\'';
-	  continue;
-	}
-      
-      *outptr++ = *ptr;
-    }
-  *outptr++ = 0;
-  return ret;
+  grub_script_escape_squotes (outptr, in, len);
+  return outptr;
 }
 
 static char *

grub-core/script/script.c

@@ -22,6 +22,27 @@
 #include <grub/parser.h>
 #include <grub/mm.h>
 
+/* Escape single quotes in first `len' characters of `in' into a GRUB
+   script argument form into `out'; return address of the end in
+   `out'. */
+char *
+grub_script_escape_squotes (char *out, const char *in, grub_size_t len)
+{
+  while (*in && len--)
+    {
+      *out++ = *in;
+      if (*in == '\'')
+	{
+	  *out++ = '\\';
+	  *out++ = '\'';
+	  *out++ = '\'';
+	}
+      in++;
+    }
+  *out = '\0';
+  return out;
+}
+
 /* It is not possible to deallocate the memory when a syntax error was
    found.  Because of that it is required to keep track of all memory
    allocations.  The memory is freed in case of an error, or assigned