Re: Operations on file descriptors in addition to pathnames Lassi Kortela 18 Dec 2019 20:52 UTC
> We can finesse this by saying in the SRFI something like > "Implementations are encouraged but not required to use POSIX > [whatever]at if the supplied /path/ is greater than PATH_MAX. Note that POSIX allows PATH_MAX to be dynamic. One should fetch the current value via sysconf(): <https://pubs.opengroup.org/onlinepubs/9699919799/functions/sysconf.html>. More fun from that page: "Some values, such as {PATH_MAX}, are sometimes so large that they must not be used to, say, allocate arrays. The sysconf() function returns a negative value to show that this symbolic constant is not even defined in this case."