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 #undef strtok
  22 #define strtok(x,y) BANNED(strtok)
  23 #undef strtok_r
  24 #define strtok_r(x,y,z) BANNED(strtok_r)
  25
  26 #undef sprintf
  27 #undef vsprintf
  28 #define sprintf(...) BANNED(sprintf)
  29 #define vsprintf(...) BANNED(vsprintf)
  30
  31 #undef gmtime
  32 #define gmtime(t) BANNED(gmtime)
  33 #undef localtime
  34 #define localtime(t) BANNED(localtime)
  35 #undef ctime
  36 #define ctime(t) BANNED(ctime)
  37 #undef ctime_r
  38 #define ctime_r(t, buf) BANNED(ctime_r)
  39 #undef asctime
  40 #define asctime(t) BANNED(asctime)
  41 #undef asctime_r
  42 #define asctime_r(t, buf) BANNED(asctime_r)
  43
  44 #endif /* BANNED_H */