Add Zip static PIE build

Signed-off-by: anindya_sen <[email protected]>

zip/README.md

@@ -0,0 +1,22 @@
+# Build zip as static PIE
+
+Build the [zip](https://infozip.sourceforge.net/Zip.html) application as a static PIE ELF running on Linux.
+
+## Requirements
+
+Make sure the following packages are installed:
+
+* GCC
+* GNU Make
+
+## Build
+
+The `zip` static PIE ELF file is located in the current directory.
+In order to rebuild it you have to run the `build.sh` bash script.
+The `build.sh` script will download the `zip` source code, extract it, patch it with the patches present in the `patch/` directory then build the code to generate the static PIE zip binary.
+
+## Running
+
+```bash
+./zip 1.zip rootfs/testfile1 rootfs/testfile2
+```

zip/build.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+APP=zip
+DIR=${APP}30
+ARCHIVE=${DIR}.tar.gz
+URL=http://downloads.sourceforge.net/infozip/${ARCHIVE}
+
+# Clean up
+rm -rf ${ARCHIVE}
+rm -rf ${DIR}
+
+echo -n "Downloading ${APP} sources ... "
+wget -q ${URL}
+if test $? -ne 0; then
+    echo ""
+    echo "Unable to download ${APP} from ${URL}"
+    exit 1
+fi
+echo "DONE"
+
+echo ""
+echo -n "Unpacking ${APP} ... "
+tar -zxvf ${ARCHIVE}
+if test $? -ne 0; then
+    echo ""
+    echo "Unable to extract ${APP}"
+    exit 1
+fi
+echo "DONE"
+
+echo ""
+echo -n "Building ${APP} ... "
+echo ""
+pushd ${DIR} > /dev/null 2>&1 || exit 1
+
+patch -p1 < ../patches/add-static-pie-flag.patch
+make -f unix/Makefile generic
+
+popd > /dev/null 2>&1 || exit 1
+
+cp ${DIR}/${APP} .
+
+rm -rf ${DIR}
+rm -rf ${ARCHIVE}
+
+echo -n "Build complete!"

zip/patches/add-static-pie-flag.patch

@@ -0,0 +1,30 @@
+diff --git a/unix/Makefile b/unix/Makefile
+index abd0c44..d3fe778 100644
+--- a/unix/Makefile
++++ b/unix/Makefile
+@@ -61,6 +61,7 @@ CFLAGS_NOOPT = -I. -DUNIX $(LOCAL_ZIP)
+ CFLAGS = -O2 $(CFLAGS_NOOPT)
+ LFLAGS1 =
+ LFLAGS2 = -s
++LDFLAGS = -static-pie -static-libgcc
+
+ # object file lists
+ OBJZ = zip.o zipfile.o zipup.o fileio.o util.o globals.o crypt.o ttyio.o \
+@@ -125,13 +126,13 @@ zips: $(ZIPS)
+ zipsman: $(ZIPS) $(ZIPMANUALs)
+
+ zip$E: $(OBJZ) $(OBJI) $(OBJA) $(LIB_BZ)
+-	$(BIND) -o zip$E $(LFLAGS1) $(OBJZ) $(OBJI) $(OBJA) $(LFLAGS2)
++	$(BIND) -o zip$E $(LFLAGS1) $(OBJZ) $(OBJI) $(OBJA) $(LFLAGS2) $(LDFLAGS)
+ zipnote$E: $(OBJN)
+-	$(BIND) -o zipnote$E $(LFLAGS1) $(OBJN) $(LFLAGS2)
++	$(BIND) -o zipnote$E $(LFLAGS1) $(OBJN) $(LFLAGS2) $(LDFLAGS)
+ zipcloak$E: $(OBJC) $(OCRCTB)
+-	$(BIND) -o zipcloak$E $(LFLAGS1) $(OBJC) $(LFLAGS2)
++	$(BIND) -o zipcloak$E $(LFLAGS1) $(OBJC) $(LFLAGS2) $(LDFLAGS)
+ zipsplit$E: $(OBJS)
+-	$(BIND) -o zipsplit$E $(LFLAGS1) $(OBJS) $(LFLAGS2)
++	$(BIND) -o zipsplit$E $(LFLAGS1) $(OBJS) $(LFLAGS2) $(LDFLAGS)
+
+ $(ZIPMANUAL): man/zip.1
+ 	nroff -man man/zip.1 | col -bx | uniq > $(ZIPMANUAL)

zip/rootfs/testfile1

@@ -0,0 +1 @@
+This is a testfile1 for testing zip application

zip/rootfs/testfile2

@@ -0,0 +1 @@
+This is a testfile2 for testing zip application