j-hpn-ssh/openbsd-compat/kludge-fd_set.c

/* Placed in the public domain.  */

/*
 * _FORTIFY_SOURCE includes a misguided check for FD_SET(n)/FD_ISSET(b)
 * where n > FD_SETSIZE. This breaks OpenSSH and other programs that
 * explicitly allocate fd_sets. To avoid this, we wrap FD_SET in a
 * function compiled without _FORTIFY_SOURCE.
 */

#include "config.h"

#if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
# include <features.h>
# if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
#  if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
#   undef _FORTIFY_SOURCE
#   undef __USE_FORTIFY_LEVEL
#   include <sys/socket.h>
void kludge_FD_SET(int n, fd_set *set) {
	FD_SET(n, set);
}
int kludge_FD_ISSET(int n, fd_set *set) {
	return FD_ISSET(n, set);
}
#  endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
# endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
#endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */