[lorax 1/2] Check if /proc is mounted (#741722)

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Needed for proper functionality in chroot,
so if it is not there, exit before doing anything.
---
 src/pylorax/__init__.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/pylorax/__init__.py b/src/pylorax/__init__.py
index 8eb6c7f..85a7567 100644
--- a/src/pylorax/__init__.py
+++ b/src/pylorax/__init__.py
@@ -170,6 +170,13 @@ class Lorax(BaseLoraxClass):
             logger.critical("no root privileges")
             sys.exit(1)
 
+        # check if /proc is mounted
+        logger.info("checking /proc")
+        if (not os.path.isdir("/proc") and not os.path.exists("/proc/mounts")
+                and not os.path.exists("/proc/devices")):
+            logger.critical("missing required /proc files (not mounted?)")
+            sys.exit(1)
+
         # do we have all lorax required commands?
         self.lcmds = constants.LoraxRequiredCommands()
 
-- 
1.7.3.2

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