diff options
| -rwxr-xr-x | Demo/scripts/from.py | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Demo/scripts/from.py b/Demo/scripts/from.py index 20771a0..21ca081 100755 --- a/Demo/scripts/from.py +++ b/Demo/scripts/from.py @@ -4,11 +4,22 @@ # Extension to multiple mailboxes and other bells & whistles are left # as exercises for the reader. -import posix +import sys, posix # Open mailbox file. Exits with exception when this fails. -mail = open(posix.environ['MAIL'], 'r') +try: + mailbox = posix.environ['MAIL'] +except RuntimeError: + sys.stderr.write \ + ('Please set environment variable MAIL to your mailbox\n') + sys.exit(2) + +try: + mail = open(mailbox, 'r') +except RuntimeError: + sys.stderr.write('Cannot open mailbox file: ' + mailbox + '\n') + sys.exit(2) while 1: line = mail.readline() |