+/* If the basic path matches maildirfolder_create_regex, we are dealing with
+a subfolder, and should ensure that a maildirfolder file exists. */
+
+if (maildirfolder_create_regex != NULL)
+ {
+ const uschar *error;
+ int offset;
+ const pcre *regex;
+
+ DEBUG(D_transport) debug_printf("checking for maildirfolder requirement\n");
+
+ regex = pcre_compile(CS maildirfolder_create_regex, PCRE_COPT,
+ (const char **)&error, &offset, NULL);
+
+ if (regex == NULL)
+ {
+ addr->message = string_sprintf("appendfile: regular expression "
+ "error: %s at offset %d while compiling %s", error, offset,
+ maildirfolder_create_regex);
+ return FALSE;
+ }
+
+ if (pcre_exec(regex, NULL, CS path, Ustrlen(path), 0, 0, NULL, 0) >= 0)
+ {
+ uschar *fname = string_sprintf("%s/maildirfolder", path);
+ if (Ustat(fname, &statbuf) == 0)
+ {
+ DEBUG(D_transport) debug_printf("maildirfolder already exists\n");
+ }
+ else
+ {
+ int fd = Uopen(fname, O_WRONLY|O_APPEND|O_CREAT, 0600);
+ if (fd < 0)
+ {
+ addr->message = string_sprintf("appendfile: failed to create "
+ "maildirfolder file in %s directory: %s", path, strerror(errno));
+ return FALSE;
+ }
+ (void)close(fd);
+ DEBUG(D_transport) debug_printf("created maildirfolder file\n");
+ }
+ }
+ else
+ {
+ DEBUG(D_transport) debug_printf("maildirfolder file not required\n");
+ }
+ }
+
+return TRUE; /* Everything exists that should exist */