Exit with appropriate return code if password is not provided, fixes #87

- Remove "ginstall" as "install" replacement on macOS
- Remove "-D" flag from "install" parameters

INSTALL.md

@@ -1,5 +1,5 @@
 Building and installing
-------------------------
+-----------------------
 
 Only dependency is C library and POSIX getopt support. 
 

Makefile

@@ -4,7 +4,7 @@
 #   make
 #
 # Windows cross compile:
-#   i686-w64-mingw32-gcc -std=gnu99 -Wall -Wextra -Wpedantic -O2 -o mcrcon.exe mcrcon.c -lws2_32
+#   x86_64-w64-mingw32-gcc -std=gnu99 -Wall -Wextra -Wpedantic -O2 -fstack-protector-all -o mcrcon.exe mcrcon.c -lws2_32
 
 EXENAME = mcrcon
 PREFIX ?= /usr/local
@@ -23,11 +23,6 @@ ifeq ($(OS), Windows_NT)
 	RM = cmd /C del /F
 endif
 
-ifeq ($(shell uname), Darwin)
-	INSTALL = ginstall
-	CFLAGS = -std=gnu99 -Wall -Wextra -Wpedantic -O2
-endif
-
 .PHONY: all
 all: $(EXENAME)
 
@@ -37,8 +32,8 @@ $(EXENAME): mcrcon.c
 ifneq ($(OS), Windows_NT)
 .PHONY: install
 install:
-	$(INSTALL) -vD $(EXENAME) $(DESTDIR)$(PREFIX)/bin/$(EXENAME)
-	$(INSTALL) -vD -m 0644 mcrcon.1 $(DESTDIR)$(PREFIX)/share/man/man1/mcrcon.1
+	$(INSTALL) -v $(EXENAME) $(DESTDIR)$(PREFIX)/bin/$(EXENAME)
+	$(INSTALL) -v -m 0644 mcrcon.1 $(DESTDIR)$(PREFIX)/share/man/man1/mcrcon.1
 	@echo "\nmcrcon installed. Run 'make uninstall' if you want to uninstall.\n"
 
 .PHONY: uninstall

mcrcon.c

@@ -209,7 +209,7 @@ int main(int argc, char *argv[])
 
 	if (pass == NULL) {
 		puts("You must give password (-p password).\nTry 'mcrcon -h' or 'man mcrcon' for help.");
-		return 0;
+		exit(EXIT_FAILURE);
 	}
 
 	if(optind == argc && terminal_mode == 0)