CRT: print a warning when exiting on signal

Every now and then users complain about settings to being persisted.
Most of the time this turns out to be caused by user: Exiting with
signal causes htop not to save settings to htoprc.

Make htop print a warning when exiting on signal.

1 files changed, 9 insertions, 1 deletions

diff --git a/CRT.c b/CRT.c
index bd5453bc..28817c23 100644
--- a/CRT.c
+++ b/CRT.c
@@ -803,8 +803,16 @@ int CRT_scrollWheelVAmount = 10;
 ColorScheme CRT_colorScheme = COLORSCHEME_DEFAULT;
 
 ATTR_NORETURN
-static void CRT_handleSIGTERM(ATTR_UNUSED int sgn) {
+static void CRT_handleSIGTERM(int sgn) {
    CRT_done();
+
+   const char* signal_str = strsignal(sgn);
+   if (!signal_str)
+      signal_str = "unknown reason";
+
+   fprintf(stderr,
+           "A signal %d (%s) was received, exiting without persisting settings to htoprc.\n",
+           sgn, signal_str);
    _exit(0);
 }