Hello Wladimir, On Thu, 7 Mar 2019 at 10:57, Wladimir Mutel <muwlgr@xxxxxxxxx> wrote: > > in https://www.freebsd.org/cgi/man.cgi?query=resolver we read : > > The res_mkquery(), res_search(), and res_query() functions return the > size of the response on success, or -1 if an error occurs. The integer > h_errno may be checked to determine the reason for error. See > gethostbyname(3) for more information. > > in http://man7.org/linux/man-pages/man3/resolver.3.html , h_errno is > not mentioned > but in the end of this page we read > > CONFORMING TO > 4.3BSD. > > the fact that h_errno is really modified as specified by BSD, could be > confirmed experimentally, but would not it be more convenient if this > was mentioned documentally ? Have you verified it experimentally on Linux/glibc (and for which of the functions)? Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
