+
+int mbox_is_magic (const char* path, struct stat* st) {
+ int magic = -1;
+ FILE* f;
+ char tmp[_POSIX_PATH_MAX];
+
+ if (S_ISDIR(st->st_mode))
+ return (-1);
+
+ if (st->st_size == 0) {
+ /* hard to tell what zero-length files are, so assume the default magic */
+ if (DefaultMagic == M_MBOX || DefaultMagic == M_MMDF)
+ return (DefaultMagic);
+ else
+ return (M_MBOX);
+ }
+ else if ((f = fopen (path, "r")) != NULL) {
+#ifndef BUFFY_SIZE
+ struct utimbuf times;
+#endif
+ fgets (tmp, sizeof (tmp), f);
+ if (safe_strncmp ("From ", tmp, 5) == 0)
+ magic = M_MBOX;
+ else if (mutt_strcmp (MMDF_SEP, tmp) == 0)
+ magic = M_MMDF;
+ safe_fclose (&f);
+#ifndef BUFFY_SIZE
+ /* need to restore the times here, the file was not really accessed,
+ * only the type was accessed. This is important, because detection
+ * of "new mail" depends on those times set correctly.
+ */
+ times.actime = st->st_atime;
+ times.modtime = st->st_mtime;
+ utime (path, ×);
+#endif
+ } else {
+ mutt_perror (path);
+ return (-1); /* fopen failed */
+ }
+
+#ifdef USE_COMPRESSED
+ if (magic == -1 && mutt_can_read_compressed (path))
+ return (M_COMPRESSED);
+#endif
+ return (magic);
+}
+
+static mx_t* reg_mx (void) {
+ mx_t* fmt = safe_calloc (1, sizeof (mx_t));
+ fmt->local = 1;
+ fmt->mx_check_empty = mbox_check_empty;
+ fmt->mx_is_magic = mbox_is_magic;
+ fmt->mx_access = access;
+ fmt->mx_open_mailbox = mbox_open_mailbox;
+ fmt->mx_open_new_message = mbox_open_new_message;
+ fmt->mx_sync_mailbox = mbox_sync_mailbox;
+ fmt->mx_check_mailbox = mbox_check_mailbox;
+ return (fmt);
+}
+
+mx_t* mbox_reg_mx (void) {
+ mx_t* fmt = reg_mx ();
+ fmt->type = M_MBOX;
+ return (fmt);
+}
+mx_t* mmdf_reg_mx (void) {
+ mx_t* fmt = reg_mx ();
+ fmt->type = M_MMDF;
+ return (fmt);
+}