From abc2efa5cc903071602bf78440dde3e6c8ebe776 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Mon, 12 Jul 2021 13:05:54 +0200
Subject: Speed up xterm start

---
 Makefile |  6 +++---
 tterm.c  |  7 +++++--
 u.c      | 11 +++++++++++
 3 files changed, 19 insertions(+), 5 deletions(-)
 create mode 100644 u.c

diff --git a/Makefile b/Makefile
index 9adada0..dd8a5b6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 CFLAGS != pkg-config --cflags x11
 LDFLAGS != pkg-config --libs x11
-CFLAGS += -O2
+CFLAGS += -O2 -Wall -pedantic
 
-tterm: tterm.c
+all: tterm u
 
 install:
-	install tterm /usr/local/bin
+	install tterm u /usr/local/bin
diff --git a/tterm.c b/tterm.c
index 6652aab..d752cd7 100644
--- a/tterm.c
+++ b/tterm.c
@@ -10,7 +10,7 @@
 #include <X11/Xlib.h>
 
 /* configuration */
-#define ARGV "xterm", "xterm", "-e", "/usr/local/bin/ksh", "-w", fifo
+#define ARGV "xterm", "xterm", "-e", "u", "/usr/local/bin/ksh", "-w", fifo
 #define MAX_CMD 1000
 #define MAX_LOOK 1000
 
@@ -66,7 +66,7 @@ cwdcpy(char *path)
 }
 
 int
-main(int argc, char *argv[])
+main()
 {
 	char *cwd, *cmd, *line, *fifo;
 	FILE *fifofp;
@@ -96,6 +96,9 @@ main(int argc, char *argv[])
 	pidatom = XInternAtom(display, "_NET_WM_PID", 0);
 	if (pidatom == None) die("no _NET_WM_PID atom found\n");
 
+	/* use ISO8859-1 encoding to speed up xterm start */
+	setenv("LC_ALL", "en_US.ISO8859-1", 1);
+
 	/* start terminal */
 	if ((child = vfork()) == 0) {
 		execlp(ARGV, NULL);
diff --git a/u.c b/u.c
new file mode 100644
index 0000000..ef69a37
--- /dev/null
+++ b/u.c
@@ -0,0 +1,11 @@
+#include <err.h>
+#include <unistd.h>
+
+int
+main(int argc, char *argv[])
+{
+	/* Enable UTF-8 encoding in xterm. */
+	write(0, "\033%G", 3);
+	execvp(argv[1], argv+1);
+	err(1, "execvp");
+}
-- 
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