From 01ffed25adbb4d18e48ceac59b1e5174ae29fc7f Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Wed, 7 Dec 2016 14:29:22 -0800
Subject: fix : invocation of path/to/unlz4 (#284), reported by @beiDei8z

---
 programs/Makefile | 21 ++++++++++++---------
 programs/lz4cli.c |  9 ++++++++-
 tests/Makefile    | 15 +++++++++++++--
 3 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/programs/Makefile b/programs/Makefile
index ffbcbf1..84662c2 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -91,7 +91,7 @@ lz4c32: lz4
 clean:
 	@$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
 	@$(RM) core *.o *.test tmp* \
-           lz4$(EXT) lz4c$(EXT) lz4c32$(EXT)
+           lz4$(EXT) lz4c$(EXT) lz4c32$(EXT) unlz4
 	@echo Cleaning completed
 
 
@@ -112,13 +112,16 @@ preview-man: clean-man man
 #FreeBSD targets
 ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU FreeBSD))
 
+unlz4: lz4
+	ln -s lz4 unlz4
+
 install: lz4$(EXT) lz4c$(EXT)
 	@echo Installing binaries
 	@install -d -m 755 $(DESTDIR)$(BINDIR)/ $(DESTDIR)$(MANDIR)/
-	@install -m 755 lz4$(EXT) $(DESTDIR)$(BINDIR)/lz4$(EXT)
-	@ln -sf lz4$(EXT) $(DESTDIR)$(BINDIR)/lz4cat$(EXT)
-	@ln -sf lz4$(EXT) $(DESTDIR)$(BINDIR)/unlz4$(EXT)
-	@install -m 755 lz4c$(EXT) $(DESTDIR)$(BINDIR)/lz4c$(EXT)
+	@install -m 755 lz4 $(DESTDIR)$(BINDIR)/lz4
+	@ln -sf lz4 $(DESTDIR)$(BINDIR)/lz4cat
+	@ln -sf lz4 $(DESTDIR)$(BINDIR)/unlz4
+	@install -m 755 lz4c$(EXT) $(DESTDIR)$(BINDIR)/lz4c
 	@echo Installing man pages
 	@install -m 644 lz4.1 $(DESTDIR)$(MANDIR)/lz4.1
 	@ln -sf lz4.1 $(DESTDIR)$(MANDIR)/lz4c.1
@@ -127,10 +130,10 @@ install: lz4$(EXT) lz4c$(EXT)
 	@echo lz4 installation completed
 
 uninstall:
-	@$(RM) $(DESTDIR)$(BINDIR)/lz4cat$(EXT)
-	@$(RM) $(DESTDIR)$(BINDIR)/unlz4$(EXT)
-	@$(RM) $(DESTDIR)$(BINDIR)/lz4$(EXT)
-	@$(RM) $(DESTDIR)$(BINDIR)/lz4c$(EXT)
+	@$(RM) $(DESTDIR)$(BINDIR)/lz4cat
+	@$(RM) $(DESTDIR)$(BINDIR)/unlz4
+	@$(RM) $(DESTDIR)$(BINDIR)/lz4
+	@$(RM) $(DESTDIR)$(BINDIR)/lz4c
 	@$(RM) $(DESTDIR)$(MANDIR)/lz4.1
 	@$(RM) $(DESTDIR)$(MANDIR)/lz4c.1
 	@$(RM) $(DESTDIR)$(MANDIR)/lz4cat.1
diff --git a/programs/lz4cli.c b/programs/lz4cli.c
index 46c2f1b..eda2018 100644
--- a/programs/lz4cli.c
+++ b/programs/lz4cli.c
@@ -260,6 +260,13 @@ static void waitEnter(void)
     (void)getchar();
 }
 
+static const char* lastNameFromPath(const char* path)
+{
+    const char* name = strrchr(path, '/');
+    if (name==NULL) name = strrchr(path, '\\');   /* windows */
+    if (name==NULL) name = path-1;
+    return name+1;
+}
 
 /*! readU32FromChar() :
     @return : unsigned integer value reach from input in `char` format
@@ -294,7 +301,7 @@ int main(int argc, const char** argv)
     const char nullOutput[] = NULL_OUTPUT;
     const char extension[] = LZ4_EXTENSION;
     size_t blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
-    const char* const exeName = argv[0];
+    const char* const exeName = lastNameFromPath(argv[0]);
 #ifdef UTIL_HAS_CREATEFILELIST
     const char** extendedFileList = NULL;
     char* fileNamesBuf = NULL;
diff --git a/tests/Makefile b/tests/Makefile
index e58d449..5923a20 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -206,12 +206,15 @@ test-lz4-multiple: lz4 datagen
 	$(LZ4) -f -m tmp1 notHere tmp2; echo $$?
 	@$(RM) tmp*
 
-test-lz4-basic: lz4 datagen
+unlz4:
+	@$(MAKE) -C $(PRGDIR) unlz4
+
+test-lz4-basic: lz4 datagen unlz4
 	@echo "\n ---- test lz4 basic compression/decompression ----"
 	./datagen -g0     | $(LZ4) -v     | $(LZ4) -t
 	./datagen -g16KB  | $(LZ4) -9     | $(LZ4) -t
 	./datagen -g20KB > tmpSrc
-	$(LZ4) < tmpSrc | $(LZ4) -d > tmpRes
+	$(LZ4) < tmpSrc   | $(LZ4) -d > tmpRes
 	diff -q tmpSrc tmpRes
 	$(LZ4) --no-frame-crc < tmpSrc | $(LZ4) -d > tmpRes
 	diff -q tmpSrc tmpRes
@@ -220,6 +223,14 @@ test-lz4-basic: lz4 datagen
 	./datagen -g17M   | $(LZ4) -9v    | $(LZ4) -qt
 	./datagen -g33M   | $(LZ4) --no-frame-crc | $(LZ4) -t
 	./datagen -g256MB | $(LZ4) -vqB4D | $(LZ4) -t
+	@echo "hello world" > tmp
+	$(LZ4) --rm tmp
+	ls -ls tmp         && false || true   # must fail (--rm)
+	ls -ls tmp.lz4
+	$(PRGDIR)/unlz4 --rm tmp.lz4
+	ls -ls tmp
+	ls -ls tmp.lz4     && false || true   # must fail (--rm)
+	ls -ls tmp.lz4.lz4 && false || true   # must fail (unlz4)
 	@$(RM) tmp*
 
 test-lz4-hugefile: lz4 datagen
-- 
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