Add caution subdirectory containing safety and liveness tests.

[libguestfs.git] / daemon / parted.c

diff --git a/daemon/parted.c b/daemon/parted.c
index 2f928b0..23083a1 100644 (file)
--- a/daemon/parted.c
+++ b/daemon/parted.c
@@ -178,27 +178,21 @@ do_part_del (const char *device, int partnum)
 int
 do_part_disk (const char *device, const char *parttype)
 {
-  const char *startstr;
-  const char *endstr;
-
   parttype = check_parttype (parttype);
   if (!parttype) {
     reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
     return -1;
   }
 
-  /* Voooooodooooooooo (thanks Jim Meyering for working this out). */
-  if (STREQ (parttype, "msdos")) {
-    startstr = "1s";
-    endstr = "-1s";
-  } else if (STREQ (parttype, "gpt")) {
-    startstr = "34s";
-    endstr = "-34s";
-  } else {
-    /* untested */
-    startstr = "1s";
-    endstr = "-1s";
-  }
+  /* Align all partitions created this way to 64 sectors, and leave
+   * the last 64 sectors at the end of the disk free.  This wastes
+   * 32K+32K = 64K on 512-byte sector disks.  The rationale is:
+   *
+   * - aligned operations are faster
+   * - GPT requires at least 34 sectors at the end of the disk.
+   */
+  const char *startstr = "64s";
+  const char *endstr = "-64s";
 
   RUN_PARTED (return -1,
               device,
@@ -301,13 +295,16 @@ test_parted_m_opt (void)
   if (r == -1) {
     /* Test failed, eg. missing or completely unusable parted binary. */
     reply_with_error ("could not run 'parted' command");
+    free (err);
     return -1;
   }
 
   if (err && strstr (err, "invalid option -- m"))
-    return result = 0;
-
-  return result = 1;
+    result = 0;
+  else
+    result = 1;
+  free (err);
+  return result;
 }
 
 static char *
@@ -384,6 +381,14 @@ do_part_get_parttype (const char *device)
     }
 
     free_strings (lines);
+
+    /* If "loop" return an error (RHBZ#634246). */
+    if (STREQ (r, "loop")) {
+      free (r);
+      reply_with_error ("not a partitioned device");
+      return NULL;
+    }
+
     return r;
   }
   else {
@@ -412,6 +417,13 @@ do_part_get_parttype (const char *device)
       return NULL;
     }
 
+    /* If "loop" return an error (RHBZ#634246). */
+    if (STREQ (p, "loop")) {
+      free (p);
+      reply_with_error ("not a partitioned device");
+      return NULL;
+    }
+
     return p;                   /* caller frees */
   }
 }