From 77171dc9e46707351014190ef7bf2fbefe1921a7 Mon Sep 17 00:00:00 2001
From: Lucio Andrés Illanes Albornoz (arab, vxp) <l.illanes@gmx.de>
Date: Jun 27 2016 16:43:41 +0000
Subject: midipix.sh:

- Detect if ${MIDIPIX_PATH}/native/lib contains shared objects that
  are symbolic links and offer to convert them to hard links. As this
  has been a problem numerous times before, midipix.sh now explicitly
  handles this.
- Launch mintty w/ the ntctty default of 80 rows and 120 columns.
- Only handle Cygwin pathnames, be they absolute or relative.
- Print the ntctty PID 0.25 seconds after launching it and optionally
  tail(1) -f ${MIDIPIX_PATH}/native/bin/libpsxscl.log if -l was specified,
  both to aid debugging.
- Sanity-check ${MIDIPIX_PATH}/native/bin for required binaries.
- Simplify the Midipix shell invocation command sequence; ${PATH} is
  now initialised to `/bin:/lib' only, absolute pathnames are only
  used for ${MIDIPIX_PATH}/native/lib in order to launch ntctty.

---

diff --git a/midipix.sh b/midipix.sh
index e36656d..a800acc 100755
--- a/midipix.sh
+++ b/midipix.sh
@@ -10,43 +10,87 @@ prepend_path() {
 	done; export PATH="${_pname_prepend}${PATH:+:${PATH}}";
 };
 
+convert_links_ask() {
+	local _ _link_name _link_target;
+	echo "Warning: ${MIDIPIX_PATH}/native/lib contains shared objects (library"
+	echo "images) that are symbolic links. This is not supported by Midipix at"
+	echo "present and commonly occurs if the binary distribution tarball was"
+	echo "extracted by an application that does not support symbolic links"
+	echo "correctly. This also occurs when a binary distribution was built locally."
+	printf "Convert all shared object symbolic links to hard links? (y|N) ";
+	read _;
+	case "${_}" in
+		[yY])	break; ;;
+		*)	echo "Exiting."; exit 5; ;;
+	esac;
+	for _link_name in $(find ${MIDIPIX_PATH}/native/lib \
+			-maxdepth 1 -name \*.so -type l); do
+		_link_target="$(readlink -- "${_link_name}")";
+		if [ -f "${MIDIPIX_PATH}/native/lib/${_link_target}" ]; then
+			echo rm -f -- "${_link_name}";
+			rm -f -- "${_link_name}";
+			echo ln -f -- "${_link_target}" "${_link_name}";
+			ln -f -- "${_link_target}" "${_link_name}";
+		fi;
+	done;
+};
+
+check_prereq_files() {
+	local _fname;
+	for _fname in	native/bin/ntctty.exe	\
+			native/bin/chroot	\
+			native/bin/env		\
+			native/bin/bash; do
+		if [ ! -e ${MIDIPIX_PATH}/${_fname} ]; then
+			return 1;
+		fi;
+	done;
+};
+
 prepend_path /bin;
 if [ "${1}" = -h ]; then
-	echo "usage: $0 [drive_letter [dirname]]"; exit 0;
-elif [ ${#} -eq 0 ]; then
-	PWD_ABSOLUTE="$(cygpath -am .)" || exit 1;
-	MIDIPIX_DRIVE="${PWD_ABSOLUTE%:*}";
-	MIDIPIX_PNAME="${PWD_ABSOLUTE#${MIDIPIX_DRIVE}:}";
-	unset PWD_ABSOLUTE;
+	echo "usage: $0 [Cygwin pathname to Midipix root]"; exit 0;
+elif [ "${1}" = -l ]; then
+	TAILF_LOG=1; shift;
+fi;
+if [ ${#} -eq 0 ]; then
+	MIDIPIX_PATH="$(cygpath -am .)" || exit 1;
 else
-	MIDIPIX_DRIVE="${1}"; MIDIPIX_PNAME="${2}";
+	MIDIPIX_PATH="${1}";
 fi;
 UNAME_OS="$(uname -o)" || exit 2;
-if [ "${MIDIPIX_DRIVE#*[ 	]*}" != "${MIDIPIX_DRIVE}" ]\
-|| [ "${MIDIPIX_PNAME#*[ 	]*}" != "${MIDIPIX_PNAME}" ]; then
+if [ "${MIDIPIX_PATH#*[ 	]*}" != "${MIDIPIX_PATH}" ]; then
 	echo "Error: drive_letter/dirname must not contain SP (\` ') or VT (\`\\\t') characters.";
 	exit 3;
 fi;
-MIDIPIX_PATH=/${MIDIPIX_DRIVE}${MIDIPIX_PNAME:+/${MIDIPIX_PNAME#/}};
-MIDIPIX_PATH=${MIDIPIX_PATH%/};
-if [ ! -d /proc/cygdrive${MIDIPIX_PATH} ]; then
+if [ ! -d ${MIDIPIX_PATH} ]; then
 	echo "Error: Midipix path non-existent or invalid (\`${MIDIPIX_PATH}'.)";
 	exit 4;
+elif [ -n "${NATIVE_LIB_LINKS:=$(find ${MIDIPIX_PATH}/native/lib -maxdepth 1 -name \*.so -type l -print -quit)}" ]; then
+	convert_links_ask || exit 5;
 else
-	if [ -f /proc/cygdrive${MIDIPIX_PATH}/native/bin/libpsxscl.log ]; then
-		echo Found libpsxscl.log, copying to /proc/cygdrive${MIDIPIX_PATH}/native/bin/libpsxscl.last.
-		cp /proc/cygdrive${MIDIPIX_PATH}/native/bin/libpsxscl.log	\
-			/proc/cygdrive${MIDIPIX_PATH}/native/bin/libpsxscl.last || exit 5;
+	check_prereq_files || exit 6;
+	if [ -f ${MIDIPIX_PATH}/native/bin/libpsxscl.log ]; then
+		echo Found libpsxscl.log, copying to ${MIDIPIX_PATH}/native/bin/libpsxscl.last.
+		cp ${MIDIPIX_PATH}/native/bin/libpsxscl.log	\
+			${MIDIPIX_PATH}/native/bin/libpsxscl.last || exit 7;
 	fi;
-	echo "Midipix drive letter.....: ${MIDIPIX_DRIVE}";
-	echo "Midipix pathname.........: ${MIDIPIX_PNAME}";
 	echo "Absolute Midipix pathname: ${MIDIPIX_PATH}";
 	if [ "${UNAME_OS}" = "Msys" ]; then
 		export MSYS2_ARG_CONV_EXCL="*";
 	fi;
-	mintty -h always -e /bin/sh -c "
+	mintty -h always -s 120,80 -e /bin/sh -c "
 		set -o errexit; stty raw -echo;
-		cd ${MIDIPIX_PATH}/native/bin;
-		export PATH=/proc/cygdrive${MIDIPIX_PATH}/native/bin:/proc/cygdrive${MIDIPIX_PATH}/native/lib;
-		./ntctty.exe -e chroot //${MIDIPIX_PATH#/}/native /bin/bash" &
+		cd ${MIDIPIX_PATH};				\
+		env PATH=${MIDIPIX_PATH}/native/lib		\
+		native/bin/ntctty.exe -e			\
+			chroot native				\
+			/bin/env PATH=/bin:/lib			\
+			bash" &
+	sleep 0.25;
+	NTCTTY_PID="$(ps -W | awk '$NF ~ /ntctty\.exe$/{print $1}')";
+	echo "ntctty PID               : ${NTCTTY_PID}";
+	if [ ${TAILF_LOG:-0} -eq 1 ]; then
+		tail -f ${MIDIPIX_PATH}/native/bin/libpsxscl.log;
+	fi;
 fi;