make an mtab in rescue mode so grub-install can work

1 files changed, 21 insertions, 0 deletions

diff --git a/rescue.py b/rescue.py
index ad72c2a7b..a13a3b00b 100644
--- a/rescue.py
+++ b/rescue.py
@@ -38,6 +38,26 @@ class RescueInterface:
     def __init__(self, screen):
 	self.screen = screen
 
+# XXX grub-install is stupid and uses df output to figure out
+# things when installing grub.  make /etc/mtab be at least
+# moderately useful.  
+def makeMtab(instPath):
+    child = os.fork()
+    if (not child):
+        isys.chroot(instPath)
+        f = open("/proc/mounts", "r")
+        lines = f.readlines()
+        f.close()
+        f = open("/etc/mtab", "w+")
+        for line in lines:
+            # and of course we don't want to reference dev nodes in /tmp
+            if line[0:5] == "/tmp/":
+                f.write("/dev/%s" % (line[5:]))
+            else:
+                f.write(line)
+        f.close()
+        sys.exit(0)
+
 def runRescue(instPath, mountroot, id):
 
     for file in [ "services", "protocols", "group" ]:
@@ -157,6 +177,7 @@ def runRescue(instPath, mountroot, id):
 
     print
     if rootmounted:
+        makeMtab("/mnt/sysimage")
         print _("Your system is mounted under the /mnt/sysimage directory.")
         print