[nfs-utils PATCH] mountstats: Fix exit code handling

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When I changed mountstats to use the argparse module, I neglected to
make the subcommand functions return any values even though main() was
looking for them.  Also removed SystemExit from the except clause at
the end of the program since it was causing the program to always exit
with a status of 1.

Signed-off-by: Scott Mayhew <smayhew@xxxxxxxxxx>
---
 tools/mountstats/mountstats.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/mountstats/mountstats.py b/tools/mountstats/mountstats.py
index fd73feb..7f5dee1 100644
--- a/tools/mountstats/mountstats.py
+++ b/tools/mountstats/mountstats.py
@@ -708,7 +708,7 @@ def mountstats_command(args):
                 mountpoints += [device]
     if len(mountpoints) == 0:
         print('No NFS mount points were found')
-        return
+        return 1
 
     if args.since:
         old_mountstats = parse_stats_file(args.since)
@@ -729,6 +729,7 @@ def mountstats_command(args):
     args.infile.close()
     if args.since:
         args.since.close()
+    return 0
 
 def nfsstat_command(args):
     """nfsstat-like command for NFS mount points
@@ -766,7 +767,7 @@ def nfsstat_command(args):
                 mountpoints += [device]
     if len(mountpoints) == 0:
         print('No NFS mount points were found')
-        return
+        return 1
 
     if args.since:
         old_mountstats = parse_stats_file(args.since)
@@ -803,6 +804,7 @@ def nfsstat_command(args):
     args.infile.close()
     if args.since:
         args.since.close()
+    return 0
 
 def print_iostat_summary(old, new, devices, time):
     for device in devices:
@@ -847,7 +849,7 @@ def iostat_command(args):
                 devices += [device]
     if len(devices) == 0:
         print('No NFS mount points were found')
-        return
+        return 1
 
     sample_time = 0
 
@@ -875,6 +877,7 @@ def iostat_command(args):
     args.infile.close()
     if args.since:
         args.since.close()
+    return 0
 
 class ICMAction(argparse.Action):
     """Custom action to deal with interval, count, and mountpoints.
@@ -986,7 +989,7 @@ try:
         sys.stdout.close()
         sys.stderr.close()
         sys.exit(res)
-except (SystemExit, KeyboardInterrupt, RuntimeError):
+except (KeyboardInterrupt, RuntimeError):
     sys.exit(1)
 except IOError:
     pass
-- 
1.9.3

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