Patch for the simple terminal to copy the output of an interactive shell command with alt + o (requires the external pipe patch)

st-copyout.diff

diff --git a/Makefile b/Makefile
index 470ac86..a836907 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,9 @@ dist: clean
 install: st
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
 	cp -f st $(DESTDIR)$(PREFIX)/bin
+	cp -f st-copyout $(DESTDIR)$(PREFIX)/bin
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/st
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/st-copyout
 	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
 	sed "s/VERSION/$(VERSION)/g" < st.1 > $(DESTDIR)$(MANPREFIX)/man1/st.1
 	chmod 644 $(DESTDIR)$(MANPREFIX)/man1/st.1
@@ -52,6 +54,7 @@ install: st
 
 uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/st
+	rm -f $(DESTDIR)$(PREFIX)/bin/st-copyout
 	rm -f $(DESTDIR)$(MANPREFIX)/man1/st.1
 
 .PHONY: all options clean dist install uninstall
diff --git a/config.def.h b/config.def.h
index 6f05dce..d57e5a7 100644
--- a/config.def.h
+++ b/config.def.h
@@ -185,6 +185,8 @@ static MouseShortcut mshortcuts[] = {
 #define MODKEY Mod1Mask
 #define TERMMOD (ControlMask|ShiftMask)
 
+static char *copyoutput[] = { "/bin/sh", "-c", "st-copyout", "externalpipe", NULL };
+
 static Shortcut shortcuts[] = {
 	/* mask                 keysym          function        argument */
 	{ XK_ANY_MOD,           XK_Break,       sendbreak,      {.i =  0} },
@@ -199,6 +201,7 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
+    { MODKEY,               XK_o,           externalpipe,   {.v = copyoutput } },
 };
 
 /*
diff --git a/st-copyout b/st-copyout
new file mode 100644
index 0000000..8eafc58
--- /dev/null
+++ b/st-copyout
@@ -0,0 +1,12 @@
+#!/bin/sh
+# Using external pipe with st, give a dmenu prompt of recent commands,
+# allowing the user to copy the output of one.
+# xclip required for this script.
+# By Jaywalker and Luke
+tmpfile=$(mktemp /tmp/st-cmd-output.XXXXXX)
+trap 'rm "$tmpfile"' 0 1 15
+sed -n "w $tmpfile"
+ps1="$(grep "\S" "$tmpfile" | tail -n 1 | sed 's/^\s*//' | cut -d' ' -f1)"
+chosen="$(grep -F "$ps1" "$tmpfile" | sed '$ d' | tac | dmenu -p "Copy which command's output?" -i -l 10 | sed 's/[^^]/[&]/g; s/\^/\\^/g')"
+eps1="$(echo "$ps1" | sed 's/[^^]/[&]/g; s/\^/\\^/g')"
+awk "/^$chosen$/{p=1;print;next} p&&/$eps1/{p=0};p" "$tmpfile" | xclip -selection clipboard