Fix expansion of #, &, %, etc. in mail copy and file commands.

This was accidentally broken by commit eea2c4aa.

* include/mailutils/mailbox.h (mu_mailbox_expand_name): New proto.
* libmailutils/mailbox/mbx_default.c (mu_mailbox_expand_name): New function.
(mu_mailbox_create_default): Use it.
(mu_set_folder_directory): Accept NULL as argument.
(mu_folder_directory): Reset default value after assiging it.  This way
the folder directory still defaults to the same value as earlier, but
can be reset to NULL, if so desired.
(plus_expand): Return a copy of the input string if folder is NULL.

* mail/copy.c (append_to_mailbox): Use mu_mailbox_create, as the mailbox
name has already been expanded.
* mail/file.c (mail_expand_name): Use mu_mailbox_expand_name.
(mail_file): Use mu_mailbox_create, as the mailbox
name has already been expanded.
* mail/mailvar.c (mailvar_cmd): New enum.
(mailvar_symbol) <handler>: Change signature and return type.
(mailvar_set): Rewrite. Take care not to modify the variable
if the handler (if any) returns non-null or if the memory can't
be allocated.
(set_folder): Handler for the "folder" variable.

* mail/tests/copy01.at: New testcase.
* mail/tests/copy02.at: New testcase.
* mail/tests/copy03.at: New testcase.
* mail/tests/copy04.at: New testcase.
* mail/tests/Makefile.am: Add new tests.
* mail/tests/testsuite.at (MUT_MAIL_CMD): Set MAILRC to /dev/null.
Add new tests.

1 files changed, 2 insertions, 0 deletions

diff --git a/include/mailutils/mailbox.h b/include/mailutils/mailbox.h
index 5cfb89dfd..9b9e43f56 100644
--- a/include/mailutils/mailbox.h
+++ b/include/mailutils/mailbox.h
@@ -36,6 +36,8 @@ const char *mu_mailbox_url (void);
 const char *mu_folder_directory (void);
 int mu_construct_user_mailbox_url (char **pout, const char *name);
 
+int mu_mailbox_expand_name (const char *name, char **expansion);
+  
 /* Constructor/destructor and possible types.  */
 extern int  mu_mailbox_create          (mu_mailbox_t *, const char *);
 extern int  mu_mailbox_create_from_url (mu_mailbox_t *, mu_url_t);