The Annoyance Filter.pdf - Fourmilab

118 MAIL FOLDER ANNOYANCE-FILTER §135
135. Some mail systems define mail folders as directories containing individual messages as files. If
the folder name is in fact a directory, set up to retrieve the contents of all the files it contains logically
concatenated.
〈 Check whether folder is a directory of messages 135 〉 ≡
#ifdef HAVE_DIRECTORY_TRAVERSAL
dirFolder = false ;
struct stat fs ;
if ((stat (fname .c str ( ), &fs ) ≡ 0) ∧ S_ISDIR(fs .st mode )) {
dh = opendir (fname .c str ( ));
if (dh ≠ Λ) {
dirFolder = true ;
dirName = fname ;
pathSeparator = ’/’; /∗ Should detect in configuration process ∗/
if (¬findNextFileInDirectory (fname )) {
nullstream .str ("");
is = &nullstream ; /∗ Doooh!!! No mail messages in directory ∗/
}
else {
if (verbose ) {
cerr ≪ "Processing␣files␣from␣directory␣\"" ≪ dirName ≪ "\"." ≪ endl ;
}
}
}
else {
cerr ≪ "Cannot␣open␣mail␣folder␣directory␣\"" ≪ fname ≪ "\"" ≪ endl ;
exit (1);
}
}
#endif
This code is cited in section 256.
This code is used in section 129.