util/libreboot-utils: randomisation test

to test the effectiveness of the rand function

Signed-off-by: Leah Rowe <leah@libreboot.org>

5 files changed, 79 insertions, 10 deletions

diff --git a/util/libreboot-utils/.gitignore b/util/libreboot-utils/.gitignore
index fbf110f9..fbfbd130 100644
--- a/util/libreboot-utils/.gitignore
+++ b/util/libreboot-utils/.gitignore
@@ -1,6 +1,7 @@
 /nvm
 /nvmutil
 /mkhtemp
+/lottery
 *.bin
 *.o
 *.d
diff --git a/util/libreboot-utils/Makefile b/util/libreboot-utils/Makefile
index 692ebf0f..a48b8ef9 100644
--- a/util/libreboot-utils/Makefile
+++ b/util/libreboot-utils/Makefile
@@ -25,6 +25,7 @@ HELLFLAGS = $(STRICT) -Weverything
 
 PROG = nvmutil
 PROGMKH = mkhtemp
+PROGLOT = lottery
 
 OBJS_NVMUTIL = \
 	obj/nvmutil.o \
@@ -48,11 +49,19 @@ OBJS_MKHTEMP = \
 	obj/lib/mkhtemp.o \
 	obj/lib/rand.o
 
+OBJS_LOTTERY = \
+	obj/lottery.o \
+	obj/lib/file.o \
+	obj/lib/string.o \
+	obj/lib/num.o \
+	obj/lib/mkhtemp.o \
+	obj/lib/rand.o
+
 # default mode
 CFLAGS_MODE = $(PORTABLE)
 CC_MODE = $(CC)
 
-all: $(PROG) $(PROGMKH)
+all: $(PROG) $(PROGMKH) $(PROGLOT)
 
 $(PROG): $(OBJS_NVMUTIL)
 	$(CC_MODE) $(OBJS_NVMUTIL) -o $(PROG) $(LDFLAGS)
@@ -60,9 +69,13 @@ $(PROG): $(OBJS_NVMUTIL)
 $(PROGMKH): $(OBJS_MKHTEMP)
 	$(CC_MODE) $(OBJS_MKHTEMP) -o $(PROGMKH) $(LDFLAGS)
 
+$(PROGLOT): $(OBJS_LOTTERY)
+	$(CC_MODE) $(OBJS_LOTTERY) -o $(PROGLOT) $(LDFLAGS)
+
 # ensure obj directory exists
 $(OBJS_NVMUTIL): obj
 $(OBJS_MKHTEMP): obj
+$(OBJS_LOTTERY): obj
 
 obj:
 	mkdir obj || true
@@ -76,6 +89,9 @@ obj/nvmutil.o: nvmutil.c
 obj/mkhtemp.o: mkhtemp.c
 	$(CC_MODE) $(CFLAGS_MODE) -c mkhtemp.c -o obj/mkhtemp.o
 
+obj/lottery.o: lottery.c
+	$(CC_MODE) $(CFLAGS_MODE) -c lottery.c -o obj/lottery.o
+
 # library/helper objects
 
 obj/lib/state.o: lib/state.c
@@ -113,19 +129,23 @@ obj/lib/rand.o: lib/rand.c
 
 # install
 
-install: $(PROG) $(PROGMKH)
+install: $(PROG) $(PROGMKH) $(PROGLOT)
 	$(INSTALL) -d $(DESTDIR)$(PREFIX)/bin
 	$(INSTALL) $(PROG) $(DESTDIR)$(PREFIX)/bin/$(PROG)
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/$(PROG)
 	$(INSTALL) $(PROGMKH) $(DESTDIR)$(PREFIX)/bin/$(PROGMKH)
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/$(PROGMKH)
+	$(INSTALL) $(PROGLOT) $(DESTDIR)$(PREFIX)/bin/$(PROGLOT)
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/$(PROGLOT)
 
 uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/$(PROG)
 	rm -f $(DESTDIR)$(PREFIX)/bin/$(PROGMKH)
+	rm -f $(DESTDIR)$(PREFIX)/bin/$(PROGLOT)
 
 clean:
-	rm -f $(PROG) $(PROGMKH) $(OBJS_NVMUTIL) $(OBJS_MKHTEMP)
+	rm -f $(PROG) $(PROGMKH) $(OBJS_NVMUTIL) $(OBJS_MKHTEMP) \
+	    $(OBJS_LOTTERY)
 
 distclean: clean
 
diff --git a/util/libreboot-utils/include/common.h b/util/libreboot-utils/include/common.h
index 6d6d8d09..4668cffa 100644
--- a/util/libreboot-utils/include/common.h
+++ b/util/libreboot-utils/include/common.h
@@ -388,6 +388,7 @@ void *mkrbuf(size_t n);
 void rset(void *buf, size_t n);
 void *mkrbuf(size_t n);
 char *mkrstr(size_t n);
+int win_lottery(void);
 
 /* Helper functions for command: dump
  */
diff --git a/util/libreboot-utils/lib/rand.c b/util/libreboot-utils/lib/rand.c
index 392ec2ba..29a756ed 100644
--- a/util/libreboot-utils/lib/rand.c
+++ b/util/libreboot-utils/lib/rand.c
@@ -100,17 +100,13 @@ win_lottery(void)
 win:
 	free_if_null(&s1), free_if_null(&s2);
 
-	err_no_cleanup(0, ELOTTERY,
-	    "Congratulations! you won the errno lottery");
-
-	exit(1);
-	return -1;
+	printf("Congratulations! you won the errno lottery!\n");
+	return 1;
 err:
 	/* the lottery won you */
 	free_if_null(&s1), free_if_null(&s2);
 	err_no_cleanup(0, EFAULT, "lottery won you");
-	exit(1);
-	return -1;
+	return 0;
 }
 
 char *
diff --git a/util/libreboot-utils/lottery.c b/util/libreboot-utils/lottery.c
new file mode 100644
index 00000000..f673a109
--- /dev/null
+++ b/util/libreboot-utils/lottery.c
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: MIT
+ * Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
+ */
+
+#ifdef __OpenBSD__
+#include <sys/param.h> /* pledge(2) */
+#endif
+
+#include <stdio.h>
+#include "include/common.h"
+
+int
+main(int argc, char *argv[])
+{
+#if defined(__OpenBSD__) && defined(OpenBSD)
+#if (OpenBSD) >= 509
+	if (pledge("stdio", NULL) == -1)
+		err_no_cleanup(0, errno, "openbsd won it");
+#endif
+#endif
+
+	if (win_lottery()) {
+		printf("You won!");
+		return 0;
+	}
+
+	return 1;
+}/* 
+
+
+  ( >:3 )    
+   /| |\
+    / \
+
+
+
+
+
+                                                                             */
+
+
+
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+
+
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+