Sandbox::https://github.com/schacon/git/blob/master/banned.h

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#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 */