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#! /usr/bin/env python
# Print From and Subject of messages in $MAIL.
# Extension to multiple mailboxes and other bells & whistles are left
# as exercises for the reader.
import sys, os
# Open mailbox file. Exits with exception when this fails.
try:
mailbox = os.environ['MAIL']
except (AttributeError, KeyError):
sys.stderr.write('No environment variable $MAIL\n')
sys.exit(2)
try:
mail = open(mailbox, 'r')
except IOError:
sys.stderr.write('Cannot open mailbox file: ' + mailbox + '\n')
sys.exit(2)
while 1:
line = mail.readline()
if not line: break # EOF
if line[:5] == 'From ':
# Start of message found
print line[:-1],
while 1:
line = mail.readline()
if not line: break # EOF
if line == '\n': break # Blank line ends headers
if line[:8] == 'Subject:':
print `line[9:-1]`,
print
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