systemd/0009-pid1-handle-console-specificities-weirdness-for-s390.patch

From dedd52f920cf7ae718bb31ac7286d3f7314540c6 Mon Sep 17 00:00:00 2001
From: Franck Bui <fbui@suse.com>
Date: Fri, 10 Jun 2016 15:19:57 +0200
Subject: [PATCH 09/11] pid1: handle console specificities/weirdness for s390
 arch

The 3270 console on S/390 can do color but not the 3215 console.

Partial forward port of
0001-On_s390_con3270_disable_ANSI_colour_esc.patch from SLE12-SP1. A
bunch of the previous code has been dropped since some changes
imported from upsteam made them uneeded.

The remaining bits are probably hackish but at least they are now
minimal.

It was an attempt to address bnc#860937. And yes turning the console
color mode off by passing $TERM=dumb via the kernel command line would
have been much more easier and enough.

This is actually implemented by recent systemd. There's also another
command line option: systemd.log_color=off.

See also a short discussion which happened on @systemd-maintainers
whose $subject is "[PATCH] support conmode setting on command line".

[fbui: fixes bsc#860937]
---
 src/basic/terminal-util.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/basic/terminal-util.c b/src/basic/terminal-util.c
index d769423d6e..1a65391146 100644
--- a/src/basic/terminal-util.c
+++ b/src/basic/terminal-util.c
@@ -779,7 +779,20 @@ bool tty_is_vc_resolve(const char *tty) {
 }
 
 const char *default_term_for_tty(const char *tty) {
-        return tty && tty_is_vc_resolve(tty) ? "linux" : "vt220";
+        if (tty && tty_is_vc_resolve(tty))
+                return "linux";
+
+#if defined (__s390__) || defined (__s390x__)
+        if (tty && tty_is_console(tty)) {
+                _cleanup_free_ char *mode = NULL;
+
+                /* Simply return "dumb" in case of OOM. */
+                (void) proc_cmdline_get_key("conmode", 0, &mode);
+                (void) proc_cmdline_value_missing("conmode", mode);
+                return streq_ptr(mode, "3270") ? "ibm327x" : "dumb";
+        }
+#endif
+        return "vt220";
 }
 
 int fd_columns(int fd) {
-- 
2.26.2