Hi, There's some inconsistency between <sys/select.h> and <sys/param.h>:
sys/select.h has this: ----------------------- /* * Select uses bit masks of file descriptors in longs. * These macros manipulate such bit fields (the filesystem macros use chars). * FD_SETSIZE may be defined by the user, but the default here * should be >= NOFILE (param.h). */ #ifndef FD_SETSIZE #define FD_SETSIZE 64 #endif ---------------------- Now, this is the relevant part of sys/param.h looks like this: ---------------------- /* Max number of open files. The Posix version is OPEN_MAX. */ /* Number of fds is virtually unlimited in cygwin, but we must provide some reasonable value for Posix conformance */ #define NOFILE 8192 ---------------------- So it's either "<= NOFILE" that was actually meant to be there in the comment (or, an equivalent "should NOT be > NOFILE"), or FD_SETSIZE should have been defined as 8192, if the comment is actually correct. Or maybe I'm missing something here :-) I understand that if I redefined FD_SETSIZE in my code before including <sys/select.h>, it'd work with whatever large (or small) fd_set I need, but that's not what I'm after. Anton Lavrentiev Contractor NIH/NLM/NCBI -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
