File 0001-Revert-settings.c-allow-load_open_settings-NULL.patch of Package putty

From 39c20d4819794417e4e84429d1eb5430e3865b25 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sat, 13 Apr 2019 18:52:28 +0100
Subject: [PATCH] Revert "settings.c: allow load_open_settings(NULL)."

This reverts commit 1b2f39c24bb6591a4192377d9393f5c3e45cb5bd.

The intention of that commit was to support the development of Uppity,
by arranging that I could get a Conf populated with completely default
values by calling load_open_settings(NULL,conf), with no risk of
interference from the normal PuTTY saved sessions full of client-side
configuration (which would have been confusing to apply unexpectedly
in a server).

So I arranged that a NULL session handle was never passed to the
low-level read_setting_[type] functions, in case it caused a segfault.
But I overlooked two things.

Firstly, on Unix, read_setting_* is where we check the tree234 of data
derived from X resources and/or -xrm command-line options. So if you
don't call those functions at all (e.g. if you have no on-disk PuTTY
saved configuration at all, not even Default Settings), you also don't
get your X defaults honoured.

Secondly, those functions themselves already all checked their
argument for NULL before doing anything dangerous with it. So the
thing I wanted to make possible was already possible _anyway_, without
me having to do anything!

So I'm exactly reverting that commit, because the _only_ thing it did
was to introduce a bug in X resource handling.
---
 settings.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/settings.c b/settings.c
index 54424f49..2c767a7a 100644
--- a/settings.c
+++ b/settings.c
@@ -107,7 +107,7 @@ char *get_remote_username(Conf *conf)
 
 static char *gpps_raw(settings_r *sesskey, const char *name, const char *def)
 {
-    char *ret = sesskey ? read_setting_s(sesskey, name) : NULL;
+    char *ret = read_setting_s(sesskey, name);
     if (!ret)
 	ret = platform_default_s(name);
     if (!ret)
@@ -131,7 +131,7 @@ static void gpps(settings_r *sesskey, const char *name, const char *def,
 static void gppfont(settings_r *sesskey, char *name,
                     Conf *conf, int primary)
 {
-    FontSpec *result = sesskey ? read_setting_fontspec(sesskey, name) : NULL;
+    FontSpec *result = read_setting_fontspec(sesskey, name);
     if (!result)
         result = platform_default_fontspec(name);
     conf_set_fontspec(conf, primary, result);
@@ -140,7 +140,7 @@ static void gppfont(settings_r *sesskey, char *name,
 static void gppfile(settings_r *sesskey, const char *name,
                     Conf *conf, int primary)
 {
-    Filename *result = sesskey ? read_setting_filename(sesskey, name) : NULL;
+    Filename *result = read_setting_filename(sesskey, name);
     if (!result)
 	result = platform_default_filename(name);
     conf_set_filename(conf, primary, result);
@@ -162,7 +162,7 @@ static void gppb(settings_r *sesskey, const char *name, bool def,
 static int gppi_raw(settings_r *sesskey, const char *name, int def)
 {
     def = platform_default_i(name, def);
-    return sesskey ? read_setting_i(sesskey, name, def) : def;
+    return read_setting_i(sesskey, name, def);
 }
 
 static void gppi(settings_r *sesskey, const char *name, int def,
-- 
2.21.0