No warning about missing or unreadable files

[Antoine Amarilli]

When running:
 $ emailgraph -m foobar
where foobar does not exist or cannot be read because of unsufficient permissions, the following mildly helpful message is shown:
  0 Contacts detected

When running:
 $ emailgraph --dot -m foobar
nothing helpful is output at all.

It would probably be better, when a file cannot be opened for reading, to display it on stderr and exit immediately.

[motters (fuzzgun)]

Fix committed in revision 28.

[Antoine Amarilli (a3nm)]

Thanks for the fix! There remains a problem though: when the program cannot read a file due to insufficient permissions, it will complain that the file is "not found", which is slightly misleading. I would suggest "cannot open FILE: ERROR" where ERROR would be something obtained using errno and strerror.

[Antoine Amarilli (a3nm)]

Looks like this works fine now. Thanks!

[motters (fuzzgun)]

There was also a situation where nothing was reported if you didn't specify either a mailbox file or a directory. That should be fixed now too.