banned.h

   1 #ifndef BANNED_H
   2 #define BANNED_H
   3
   4 /*
   5  * This header lists functions that have been banned from our code base,
   6  * because they're too easy to misuse (and even if used correctly,
   7  * complicate audits). Including this header turns them into compile-time
   8  * errors.
   9  */
  10
  11 #define BANNED(func) sorry_##func##_is_a_banned_function
  12
  13 #undef strcpy
  14 #define strcpy(x,y) BANNED(strcpy)
  15 #undef strcat
  16 #define strcat(x,y) BANNED(strcat)
  17 #undef strncpy
  18 #define strncpy(x,y,n) BANNED(strncpy)
  19 #undef strncat
  20 #define strncat(x,y,n) BANNED(strncat)
  21
  22 #undef sprintf
  23 #undef vsprintf
  24 #ifdef HAVE_VARIADIC_MACROS
  25 #define sprintf(...) BANNED(sprintf)
  26 #define vsprintf(...) BANNED(vsprintf)
  27 #else
  28 #define sprintf(buf,fmt,arg) BANNED(sprintf)
  29 #define vsprintf(buf,fmt,arg) BANNED(vsprintf)
  30 #endif
  31
  32 #undef gmtime
  33 #define gmtime(t) BANNED(gmtime)
  34 #undef localtime
  35 #define localtime(t) BANNED(localtime)
  36 #undef ctime
  37 #define ctime(t) BANNED(ctime)
  38 #undef ctime_r
  39 #define ctime_r(t, buf) BANNED(ctime_r)
  40 #undef asctime
  41 #define asctime(t) BANNED(asctime)
  42 #undef asctime_r
  43 #define asctime_r(t, buf) BANNED(asctime_r)
  44
  45 #endif /* BANNED_H */