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util/libreboot-utils: randomisation test

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to test the effectiveness of the rand function

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-25 22:20:19 +00:00
parent dc7a02da2d
commit e0319f0116
5 changed files with 79 additions and 10 deletions
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util/libreboot-utils/.gitignore
+1
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@@ -1,6 +1,7 @@
/nvm
/nvmutil
/mkhtemp
/lottery
*.bin
*.o
*.d
util/libreboot-utils/Makefile
+23 -3
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@@ -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
util/libreboot-utils/include/common.h
+1
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@@ -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
*/
util/libreboot-utils/lib/rand.c
+3 -7
View File
@@ -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 *
util/libreboot-utils/lottery.c
+51
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@@ -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 )
/| |\
/ \
*/