+ /* In the common case where the internal and external mode bits are the same,
+ propagate all unknown bits to the external mode.
+ This matches historical practice.
+ Otherwise, just copy the bits we know about. */
+ uintmax_t u =
+ ((S_ISUID == TSUID && S_ISGID == TSGID && S_ISVTX == TSVTX
+ && S_IRUSR == TUREAD && S_IWUSR == TUWRITE && S_IXUSR == TUEXEC
+ && S_IRGRP == TGREAD && S_IWGRP == TGWRITE && S_IXGRP == TGEXEC
+ && S_IROTH == TOREAD && S_IWOTH == TOWRITE && S_IXOTH == TOEXEC)
+ ? v
+ : ((v & S_ISUID ? TSUID : 0)
+ | (v & S_ISGID ? TSGID : 0)
+ | (v & S_ISVTX ? TSVTX : 0)
+ | (v & S_IRUSR ? TUREAD : 0)
+ | (v & S_IWUSR ? TUWRITE : 0)
+ | (v & S_IXUSR ? TUEXEC : 0)
+ | (v & S_IRGRP ? TGREAD : 0)
+ | (v & S_IWGRP ? TGWRITE : 0)
+ | (v & S_IXGRP ? TGEXEC : 0)
+ | (v & S_IROTH ? TOREAD : 0)
+ | (v & S_IWOTH ? TOWRITE : 0)
+ | (v & S_IXOTH ? TOEXEC : 0)));
+ to_oct (u, (uintmax_t) 0, p, s, "mode_t");