I have noticed that the noip-updater package has stopped working for some time to me, but I have not stopped too look into the problem, as it was not important to me until now. The log registers the following: Feb 14 21:01:15 gentoo noip2[6855]: Can't gethostbyname for dynupdate.no-ip.com I checked the hostx works. Then I tested the gethostbyname function with the simple program: $ cat gh.c #include <stdio.h> #include <netdb.h> int main(void) { struct hostent * h; h = gethostbyname("gentoo.org"); herror("ERROR FOUND: "); printf("name = %s\n", h->h_name); printf("addrtype = %i\n", h->h_addrtype); printf("length = %i\n", h->h_length); printf("addr = %s\n", h->h_addr_list[0]); return 0; } $ ./gh ERROR FOUND: : Unknown host name = gentoo.org addrtype = 2 length = 4 addr =
I have noticed that the noip-updater package has stopped working for some time to me, but I have not stopped too look into the problem, as it was not important to me until now. The log registers the following: Feb 14 21:01:15 gentoo noip2[6855]: Can't gethostbyname for dynupdate.no-ip.com I checked the hostx works. Then I tested the gethostbyname function with the simple program: $ cat gh.c #include <stdio.h> #include <netdb.h> int main(void) { struct hostent * h; h = gethostbyname("gentoo.org"); herror("ERROR FOUND: "); printf("name = %s\n", h->h_name); printf("addrtype = %i\n", h->h_addrtype); printf("length = %i\n", h->h_length); printf("addr = %s\n", h->h_addr_list[0]); return 0; } $ ./gh ERROR FOUND: : Unknown host name = gentoo.org addrtype = 2 length = 4 addr = ÌJcd $ hostx gentoo.org gentoo.org A 204.74.99.100 So it seems that glibc is buggy! Reproducible: Always Steps to Reproduce: 1. 2. 3. # emerge --info Portage 2.0.50-r1 (default-x86-1.4, gcc-3.3.2, glibc-2.3.3_pre20040207-r0, 2.6.3-rc2-gentoo) ================================================================= System uname: 2.6.3-rc2-gentoo i686 AMD Athlon(tm) XP 2000+ Gentoo Base System version 1.4.3.13 Autoconf: sys-devel/autoconf-2.59 Automake: sys-devel/automake-1.8.2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-O2 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O2 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs buildpkg ccache sandbox" GENTOO_MIRRORS="http://www.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage" USE="3dnow X aalib acl acpi alsa apm arts artswrappersuid avi berkdb bonobo cdr crypt cups dvd encode esd fbcon foomaticdb gdbm gif gnome gpm gracenote gtk gtk2 gtkhtml guile imap imlib imlib2 java javascript jpeg kde libg++ libwww linguas_de linguas_en linguas_fr linguas_pt lirc mad mbox mikmod mmx motif mozilla mozsvg mpeg mysql ncurses nls oggvorbis opengl oss pam pdflib perl png python qt quicktime readline rplay samba sdl slang spell sse ssl stroke svga tcltk tcpd tetex tiff truetype usb wmf x86 xface xml xml2 xmms xv zlib"
if it failed to work then gethostbyname() would have returned null i dont know why h_errno is being set to 1, but this behavior occurs with glibc-2.2.5 as well as the latest 2.3.3_pre that it's in portage so perhaps the correct behavior would be to: if (!h) herror("ERROR");
The original problem is that the noip2 proram from the net-dns/noip-updater package is not working and gives te message Can't gethostbyname for dynupdate.no-ip.com Then I wrote the test program to test it. But it seems that the problem is not with the gethostbyname() function, As it works in this test after changing the way the error condition is checked. So I have openned a new bug 41608, "gethostbyname failure in net-dns/noip-updater".
*** This bug has been marked as a duplicate of 41608 ***
Check the manpage (last sentence): -- RETURN VALUE The gethostbyname() and gethostbyaddr() functions return the hostent structure or a NULL pointer if an error occurs. On error, the h_errno variable holds an error number. When non-NULL, the return value may point at static data, see the Notes below.
