renamed scripts to better represent their function

- payload now extracts in the right location
- payload checks if the file is already extracted
- etc.

.gitignore

@@ -1,2 +1 @@
-**/pcmi/**
+tests/**
-**/badwolf/**

posix/maketi

@@ -6,7 +6,7 @@ WORKDIR="$(basename "$1")"
 if [ -z "$LIBPATH" ]; then
 	LIBPATH='/lib'
 fi
-PRELOAD_SCRIPT='preload'
+PAYLOAD_SCRIPT='payload'
 LIBLIST="$WORKDIR"/liblist
 SUMFILE="$WORKDIR"/checksum
 tmpfile="$WORKDIR"/tt
@@ -141,14 +141,14 @@ md5sum -b "$DIRNAME".tar | cut -d " " -f1 > "$SUMFILE"
 lz4 --rm -9 -c "$DIRNAME.tar" > "$DIRNAME".tar.lz4
 
 echo "Injecting payload..."
-sed s/SUM/"$(cat "$SUMFILE")"/ "$PRELOAD_SCRIPT" |
+sed s/SUM/"$(cat "$SUMFILE")"/ "$PAYLOAD_SCRIPT" |
 sed s/ID/"$(basename "$DIRNAME")"/ |
 awk '!/^ *#/ && NF' > tpp
 
 size="$(wc -c tpp | cut -d " " -f1)"
 strsize="$(echo "BYTES" | wc -c)"
 numsize="$(echo "$size" | wc -c)"
-normsize="$((size - (strsize - numsize)))"
+normsize="$((size - (strsize - numsize) + 1))"
 
 sed s/BYTES/"$normsize"/ tpp > tpr
 cat tpr "$DIRNAME".tar.lz4 > "$DIRNAME".ti

posix/payload

@@ -0,0 +1,27 @@
+#!/bin/sh -e
+
+# TODO: verify checksum before extracting
+# TODO: extract self without resolving to $0 because it doesn't resolve links
+
+if [ -z "$XDG_CACHE_HOME" ]; then
+	destdir=/tmp
+else
+	destdir="$XDG_CACHE_HOME"
+fi
+
+if ! [ "$(head -n 1 "$destdir"/ID/checksum 2>/dev/null)" = 'SUM' ]; then
+	tail -c +BYTES "$0" | lz4 -dc | tar -x -C "$destdir"
+	echo "SUM" > "$destdir"/ID/checksum
+fi
+
+ORIGIN="$destdir"/ID
+LD_LIBRARY_PATH="$ORIGIN/lib"
+PATH="$ORIGIN/bin":$PATH
+export ORIGIN
+export LD_LIBRARY_PATH
+export PATH
+
+# export LD_DEBUG='libs'
+
+# TODO: use $0 instead
+exec "$destdir"/ID/bin/"$(basename "$1")"

posix/preload

@@ -1,19 +0,0 @@
-#!/bin/sh -e
-
-# TODO: verify checksum before extracting
-# SUM
-# TODO: extract self without resolving to $0 because it doesn't resolve links
-tail -c +"$(expr BYTES + 1)" $0 | lz4 -dc | tar -x
-# TODO: remove hardcoded directory
-# TODO: use a different extraction path
-cd ID
-
-export ORIGIN="$(pwd)"
-export LD_LIBRARY_PATH="$ORIGIN/lib"
-export PATH="$ORIGIN/bin":$PATH
-
-#export LD_DEBUG='libs'
-
-# TODO: use $0 instead
-# FIXME: uses the system's basename
-exec bin/"$(basename "$1")"