streq(1)

Makefile

@@ -95,8 +95,11 @@ simexec.o: libio sysexits src/simexec.c
 simexec: libio simexec.o
 	$(CC) $(CFLAGS) -o bin/simexec build/libio.o build/simexec.o
 
-streq: sysexits src/streq.c usefulmacros
-	$(CC) $(CFLAGS) -o bin/streq src/streq.c
+streq.o: libio sysexits src/streq.c
+	$(CC) $(CFLAGS) -c -o build/streq.o src/streq.c
+
+streq: libio streq.o
+	$(CC) $(CFLAGS) -o bin/streq build/libio.o build/streq.o
 
 str.o: src/str.c
 	$(CC) $(CFLAGS) -o build/str.o src/str.c

src/streq.c

@@ -1,16 +1,18 @@
 #include <sysexits.h>
 #include <unistd.h>
-#include "noargvzero.h"
+#include "libio.h"
+
+static char *program_name = "streq";
 
 int main(int argc, char *argv[]){
 	int i;
 	int j;
-	NOARGVZERO(argv);
 
 	if(argc < 3){
 		write(2, "Usage: ", 7);
-		for(i = 0; argv[0][i] != '\0'; ++i);
-		write(2, argv[0], i);
+		if(argv[0] == NULL)
+			argv[0] = program_name;
+		fdprint(2, argv[0]);
 		write(2, " [strings...]\n", 14);
 		return EX_USAGE;
 	}