Settings: check if writing configuration file was successful

Writing to the file stream might fail due to a immutable file or a
filesystem error.
Check the error indicator for the stream and for fclose() failures.

1 files changed, 7 insertions, 2 deletions

diff --git a/htop.c b/htop.c
index 785d4554..285353d5 100644
--- a/htop.c
+++ b/htop.c
@@ -482,8 +482,13 @@ int main(int argc, char** argv) {
    Platform_done();
 
    CRT_done();
-   if (settings->changed)
-      Settings_write(settings);
+
+   if (settings->changed) {
+      int r = Settings_write(settings);
+      if (r < 0)
+         fprintf(stderr, "Can not save configuration to %s: %s\n", settings->filename, strerror(-r));
+   }
+
    Header_delete(header);
    ProcessList_delete(pl);