Print empty string for not mounted disks. (#148)

An empty string becomes the default value for format_not_mounted parameter
for any disk entry. This avoids printing erroneous values when a
filesystem is not mounted.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/print_disk_info.c b/src/print_disk_info.c
index edc69ac..624a8e2 100644
--- a/src/print_disk_info.c
+++ b/src/print_disk_info.c
@@ -130,13 +130,15 @@ void print_disk_info(yajl_gen json_gen, char *buffer, const char *path, const ch
 #else
     struct statvfs buf;
 
+    if (format_not_mounted == NULL) {
+        format_not_mounted = "";
+    }
+
     if (statvfs(path, &buf) == -1) {
         /* If statvfs errors, e.g., due to the path not existing,
          * we use the format for a not mounted device. */
-        if (format_not_mounted != NULL) {
-            format = format_not_mounted;
-        }
-    } else if (format_not_mounted != NULL) {
+        format = format_not_mounted;
+    } else {
         FILE *mntentfile = setmntent("/etc/mtab", "r");
         struct mntent *m;
         bool found = false;