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#
# A class to hand a unix-style or mmdf-style mailboxes
#
# Jack Jansen, CWI, March 1994.
#
import rfc822
class _Mailbox:
def __init__(self, fp):
self.fp = fp
self.seekp = 0
def seek(self, pos):
self.seekp = pos
def next(self):
while 1:
self.fp.seek(self.seekp)
try:
self._search_start()
except EOFError:
self.seekp = self.fp.tell()
return None
start = self.fp.tell()
self._search_end()
self.seekp = stop = self.fp.tell()
if start <> stop:
break
return rfc822.Message(_Subfile(self.fp, start, stop))
class _Subfile:
def __init__(self, fp, start, stop):
self.fp = fp
self.start = start
self.stop = stop
self.pos = self.start
def read(self, length = None):
if self.pos >= self.stop:
return ''
if length is None:
length = self.stop - self.pos
self.fp.seek(self.pos)
self.pos = self.pos + length
return self.fp.read(length)
def readline(self, length = None):
if self.pos >= self.stop:
return ''
if length is None:
length = self.stop - self.pos
self.fp.seek(self.pos)
data = self.fp.readline(length)
if len(data) < length:
length = len(data)
self.pos = self.pos + length
return data
def tell(self):
return self.pos - self.start
def seek(self, pos):
self.pos = pos + self.start
def close(self):
pass
class UnixMailbox(_Mailbox):
def _search_start(self):
while 1:
line = self.fp.readline()
if not line:
raise EOFError
if line[:5] == 'From ':
return
def _search_end(self):
while 1:
pos = self.fp.tell()
line = self.fp.readline()
if not line:
return
if line[:5] == 'From ':
self.fp.seek(pos)
return
class MmdfMailbox(_Mailbox):
def _search_start(self):
while 1:
line = self.fp.readline()
if not line:
raise EOFError
if line[:5] == '\001\001\001\001\n':
return
def _search_end(self):
while 1:
pos = self.fp.tell()
line = self.fp.readline()
if not line:
return
if line == '\001\001\001\001\n':
self.fp.seek(pos)
return
if __name__ == '__main__':
import posix
import time
import sys
import string
mbox = '/usr/mail/'+posix.environ['USER']
fp = open(mbox, 'r')
mb = UnixMailbox(fp)
msgs = []
while 1:
msg = mb.next()
if not msg:
break
msgs.append(msg)
if len(sys.argv) > 1:
num = string.atoi(sys.argv[1])
print 'Message %d body:'%num
msg = msgs[num-1]
msg.rewindbody()
sys.stdout.write(msg.fp.read())
sys.exit(0)
print 'Mailbox',mbox,'has',len(msgs),'messages:'
for msg in msgs:
f = msg.getheader('from')
s = msg.getheader('subject')
d = (msg.getheader('date'))
print '%20.20s %18.18s %-30.30s'%(f, d[5:], s)
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