mdirs: extract DT_* handling

blaze822_priv.h

@@ -16,4 +16,13 @@ struct message {
 #define lc(c) ((c) | 0x20)
 #define uc(c) ((c) & 0xdf)
 
+// dirent type that can be a mail/dir (following symlinks)
+#if defined(DT_REG) && defined(DT_LNK) && defined(DT_UNKNOWN)
+#define MAIL_DT(t) (t == DT_REG || t == DT_LNK || t == DT_UNKNOWN)
+#define DIR_DT(t) (t == DT_DIR || t == DT_UNKNOWN)
+#else
+#define MAIL_DT(t) (1)
+#define DIR_DT(t) (1)
+#endif
+
 void *mymemmem(const void *h0, size_t k, const void *n0, size_t l);

mdirs.c

@@ -8,6 +8,7 @@
 #include <unistd.h>
 
 #include "blaze822.h"
+#include "blaze822_priv.h"
 
 static char sep = '\n';
 int aflag;
@@ -47,10 +48,9 @@ mdirs(char *fpath)
 	}
 
 	while ((d = readdir(dir))) {
-#if defined(DT_DIR) && defined(DT_UNKNOWN)
-		if (d->d_type != DT_DIR && d->d_type != DT_UNKNOWN)
+		if (!DIR_DT(d->d_type))
 			continue;
-#endif
+
 		if (d->d_name[0] == '.' &&
 		    d->d_name[1] == 0)
 			continue;