#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) #define S_ISTXT S_ISVTX /* sticky bit: not supported */ #define S_IREAD S_IRUSR /* backward compatability */ #define S_IWRITE S_IWUSR /* backward compatability */ #define S_IEXEC S_IXUSR /* backward compatability */ #endif