grub-probe -t prefix, -t all

@@ -39,12 +39,11 @@
 #define _GNU_SOURCE	1
 #include <getopt.h>
 
-#define PRINT_FS	0
-#define PRINT_DRIVE	1
-#define PRINT_DEVICE	2
-#define PRINT_PARTMAP	3
-
-int print = PRINT_FS;
+#define PRINT_FS	0x01
+#define PRINT_DRIVE	0x02
+#define PRINT_PREFIX	0x04
+#define PRINT_DEVICE	0x08
+#define PRINT_PARTMAP	0x10
 
 void
 grub_putchar (int c)

@@ -70,7 +69,7 @@
 }
 
 static void
-probe (const char *path)
+probe (const char *path, int types)
 {
   char *device_name;
   char *drive_name = NULL;

@@ -81,20 +80,36 @@
   if (! device_name)
     grub_util_error ("cannot find a device for %s.\n", path);
 
-  if (print == PRINT_DEVICE)
+  if (types & PRINT_DEVICE)
     {
       printf ("%s\n", device_name);
-      goto end;
+      types &= ~PRINT_DEVICE;
+      if (types == 0)
+        goto end;
     }
 
   drive_name = grub_util_get_grub_dev (device_name);
   if (! drive_name)
     grub_util_error ("cannot find a GRUB drive for %s.\n", device_name);
   
-  if (print == PRINT_DRIVE)
+  if (types & PRINT_DRIVE)
     {
       printf ("(%s)\n", drive_name);
-      goto end;
+      types &= ~PRINT_DRIVE;
+      if (types == 0)
+        goto end;
+    }
+
+  if (types & PRINT_PREFIX)
+    {
+      char * prefix = grub_get_prefix (path);
+      if (! prefix)
+        grub_util_error ("cannot find prefix for %s.\n", path);
+      printf ("%s\n", prefix);
+      free (prefix);
+      types &= ~PRINT_PREFIX;
+      if (types == 0)
+        goto end;
     }
 
   grub_util_info ("opening %s", drive_name);

@@ -102,7 +117,7 @@
   if (! dev)
     grub_util_error ("%s", grub_errmsg);
 
-  if (print == PRINT_PARTMAP)
+  if (types & PRINT_PARTMAP)
     {
       if (dev->disk->partition == NULL)
         grub_util_error ("Cannot detect partition map for %s", drive_name);

@@ -119,14 +134,16 @@
         printf ("sun\n");
       else
         grub_util_error ("Unknown partition map %s", dev->disk->partition->partmap->name);
-      goto end;
     }
 
-  fs = grub_fs_probe (dev);
-  if (! fs)
-    grub_util_error ("%s", grub_errmsg);
+  if (types & PRINT_FS)
+    {
+      fs = grub_fs_probe (dev);
+      if (! fs)
+        grub_util_error ("%s", grub_errmsg);
 
-  printf ("%s\n", fs->name);
+      printf ("%s\n", fs->name);
+    }
   
   grub_device_close (dev);
 

@@ -159,8 +176,9 @@
 Probe device information for a given path.\n\
 \n\
   -m, --device-map=FILE     use FILE as the device map [default=%s]\n\
-  -t, --target=(fs|drive|device|partmap)\n\
-                            print filesystem module, GRUB drive, system device or partition map module [default=fs]\n\
+  -t, --target=(fs|drive|prefix|device|partmap|all)\n\
+                            print filesystem module, GRUB drive, path prefix, system device\n\
+                            or partition map module [default=fs]\n\
   -h, --help                display this message and exit\n\
   -V, --version             print version information and exit\n\
   -v, --verbose             print verbose messages\n\

@@ -175,6 +193,7 @@
 int
 main (int argc, char *argv[])
 {
+  unsigned types = 0;
   char *dev_map = 0;
   char *path;
   

@@ -199,13 +218,17 @@
 
 	  case 't':
 	    if (!strcmp (optarg, "fs"))
-	      print = PRINT_FS;
+	      types |= PRINT_FS;
 	    else if (!strcmp (optarg, "drive"))
-	      print = PRINT_DRIVE;
+	      types |= PRINT_DRIVE;
+	    else if (!strcmp (optarg, "prefix"))
+	      types |= PRINT_PREFIX;
 	    else if (!strcmp (optarg, "device"))
-	      print = PRINT_DEVICE;
+	      types |= PRINT_DEVICE;
 	    else if (!strcmp (optarg, "partmap"))
-	      print = PRINT_PARTMAP;
+	      types |= PRINT_PARTMAP;
+	    else if (!strcmp (optarg, "all"))
+	      types = ~0;
 	    else
 	      usage (1);
 	    break;

@@ -227,6 +250,8 @@
 	    break;
 	  }
     }
+  if (types == 0)
+    types = PRINT_FS;
 
   /* Obtain PATH.  */
   if (optind >= argc)

@@ -250,7 +275,7 @@
   grub_init_all ();
 
   /* Do it.  */
-  probe (path);
+  probe (path, types);
   
   /* Free resources.  */
   grub_fini_all ();