From d85350854dca4c6495cb78c89ff4934c7a908509 Mon Sep 17 00:00:00 2001 From: dacctal Date: Mon, 29 Jun 2026 03:19:33 +0000 Subject: FCC: banned.h --- include/banned.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 include/banned.h (limited to 'include/banned.h') diff --git a/include/banned.h b/include/banned.h new file mode 100644 index 0000000..2b934c8 --- /dev/null +++ b/include/banned.h @@ -0,0 +1,47 @@ +#ifndef BANNED_H +#define BANNED_H + +/* + * This header lists functions that have been banned from our code base, + * because they're too easy to misuse (and even if used correctly, + * complicate audits). Including this header turns them into compile-time + * errors. + */ + +#define BANNED(func) sorry_##func##_is_a_banned_function + +#undef strcpy +#define strcpy(x,y) BANNED(strcpy) +#undef strcat +#define strcat(x,y) BANNED(strcat) +#undef strncpy +#define strncpy(x,y,n) BANNED(strncpy) +#undef strncat +#define strncat(x,y,n) BANNED(strncat) +#undef strtok +#define strtok(x,y) BANNED(strtok) +#undef strtok_r +#define strtok_r(x,y,z) BANNED(strtok_r) + +#undef sprintf +#undef vsprintf +#define sprintf(...) BANNED(sprintf) +#define vsprintf(...) BANNED(vsprintf) + +#undef gmtime +#define gmtime(t) BANNED(gmtime) +#undef localtime +#define localtime(t) BANNED(localtime) +#undef ctime +#define ctime(t) BANNED(ctime) +#undef ctime_r +#define ctime_r(t, buf) BANNED(ctime_r) +#undef asctime +#define asctime(t) BANNED(asctime) +#undef asctime_r +#define asctime_r(t, buf) BANNED(asctime_r) + +#undef mktemp +#define mktemp(x) BANNED(mktemp) + +#endif /* BANNED_H */ -- cgit v1.2.3