Re: [gentoo-user] Tcp Listener
Maybe I miss your problem.But there is a command line program names 'netcat', which can send/receive TCP/UDP messages. also would be nice to check its source code if you are interested to writing your own. 2014-02-04 xarman manousidis@gmail.com: I'm interested in making a TCP Listener in C / C++ on Linux to accept many connections simultaneously. I did a relative search on the Web and although I am aware of the C language as to a certain extent, I struggle to find a model program. Essentially, it is the listener of a server that receives a signal and stores it in a database and do some other functions. I know how to do the functions but I'm looking for a way to fix the basic skeleton of listener that will be always active. I'm not sure if I need multi threading or multi socketing for multi connections. If you have any knowledge on the subject or have a simple example or even some reference in order to work on that, I'd appreciate it.
[gentoo-user] there are no ebuilds built with USE flags to satisfy “XXX”
Hello everyone.
Today I want to get some game to play, so I want to install supertux,a game
similar to super mario.But when I issue the command,it turned out an error.
senge@Senge-Laptop ~ % sudo emerge -va supertux
These are the packages that would be merged, in order:
Calculating dependencies... done!
emerge: there are no ebuilds built with USE flags to satisfy
media-libs/sdl-mixer[mikmod,vorbis].
!!! One of the following packages is required to complete your request:
- media-libs/sdl-mixer-1.2.12-r3::gentoo (Change USE: +mikmod, this change
violates use flag constraints defined by media-libs/sdl-mixer-1.2.12-r3:
'midi? ( any-of ( timidity fluidsynth ) ) timidity? ( midi ) fluidsynth? (
midi ) mp3? ( any-of ( smpeg mad ) ) smpeg? ( mp3 ) mad? ( mp3 ) mod? (
any-of ( mikmod modplug ) ) mikmod? ( mod ) modplug? ( mod )')
(dependency required by games-arcade/supertux-0.1.3 [ebuild])
(dependency required by supertux [argument])
I haven't sdl-mixer installed and I don't know what that is.
senge@Senge-Laptop ~ % eix sdl-mixer
* media-libs/sdl-mixer
Available versions: 1.2.12-r1 1.2.12-r3 {flac fluidsynth mad midi
mikmod mod modplug mp3 playtools smpeg static-libs timidity vorbis +wav}
Homepage:http://www.libsdl.org/projects/SDL_mixer/
Description: Simple Direct Media Layer Mixer Library
I have googled little, but failed.Anybody know how to solve it?
Re: [gentoo-user] Re: [gentoo-user] there are no ebuilds built with USE flags to satisfy “XXX”
Thanks a lot! I can play it now.BTW,what emerge means by that? I can
emerge the game only when the two USE flags is enabled both?
2014/1/5 Willie Matthews matthews.wil...@gmail.com
On 01/04/2014 07:17 PM, 钱泽森 wrote:
Hello everyone.
Today I want to get some game to play, so I want to install supertux,a
game similar to super mario.But when I issue the command,it turned out
an error.
senge@Senge-Laptop ~ % sudo emerge -va supertux
These are the packages that would be merged, in order:
Calculating dependencies... done!
emerge: there are no ebuilds built with USE flags to satisfy
media-libs/sdl-mixer[mikmod,vorbis].
!!! One of the following packages is required to complete your request:
- media-libs/sdl-mixer-1.2.12-r3::gentoo (Change USE: +mikmod, this
change violates use flag constraints defined by
media-libs/sdl-mixer-1.2.12-r3: 'midi? ( any-of ( timidity fluidsynth
) ) timidity? ( midi ) fluidsynth? ( midi ) mp3? ( any-of ( smpeg mad
) ) smpeg? ( mp3 ) mad? ( mp3 ) mod? ( any-of ( mikmod modplug ) )
mikmod? ( mod ) modplug? ( mod )')
(dependency required by games-arcade/supertux-0.1.3 [ebuild])
(dependency required by supertux [argument])
I haven't sdl-mixer installed and I don't know what that is.
senge@Senge-Laptop ~ % eix sdl-mixer
* media-libs/sdl-mixer
Available versions: 1.2.12-r1 1.2.12-r3 {flac fluidsynth mad midi
mikmod mod modplug mp3 playtools smpeg static-libs timidity vorbis +wav}
Homepage: http://www.libsdl.org/projects/SDL_mixer/
Description: Simple Direct Media Layer Mixer Library
I have googled little, but failed.Anybody know how to solve it?
I got the exact same error when I tried to install. I already have
media-libs/sdl-mixer-1.2.12-r3 USE=flac mad mp3 vorbis wav -fluidsynth
-midi -mikmod -mod -modplug -playtools -smpeg -static-libs -timidity
I think what it is telling you is if you have mikmod as a user flag you
also have to have mod.
media-libs/sdl-mixer-1.2.12-r3 USE=flac mad mikmod* mod* mp3 vorbis wav
-fluidsynth -midi -modplug -playtools -smpeg -static-libs -timidity
So you will just add
media-libs/sdl-mixer mikmod mod
to your package.use file.
--
Willie Matthews
matthews.wil...@gmail.com
(702) 508.8455
I have my geeky moments!
Re: [gentoo-user] nfsmount hangs or reading any file IO error on client,custom kernel on server
After much tries. problem sovled.:-) It's a authentication problem. according to nfs mannual page: In addition to combining these sideband protocols with the main NFS protocol, NFS version 4 introduces more advanced forms of access control, authentication, and in-transit data protection. The NFS version 4 specification mandates NFSv4 ACLs, RPCGSS authentication, and RPCGSS security flavors that provide per-RPC integrity checking and encryption. Because NFS version 4 combines the function of the sideband protocols into the main NFS protocol, the new security fea�\ tures apply to all NFS version 4 operations including mounting, file locking, and so on. RPCGSS authentication can also be used with NFS versions 2 and 3, but does not protect their sideband protocols. and this patch: https://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.4-rc2/2.6.4-rc2-mm1/broken-out/nfs-simplify-config-options.patch nfsv4 need DES and MD5.but in official kernel, the dependency missed, nor writesyou should say yes to support nfsv4, so I turn it down.(bad habbit). The patch is for 2.6.4, and I wonder why the dependency mistake still existed. Anyway, probleam solved. 2013/11/19 edwardu...@live.com edwardu...@live.com On 11/18/2013 12:08 AM, 钱泽森 wrote: Thanks for reply! However, CONFIG_NFS_FS is a client config, and probably not related to my server problem. Thanks for being kind and explaining it to me. :-) I though that was needed. I went back and read the gentoo nfs wiki and saw that under notes, sorry for the noise.
[gentoo-user] nfsmount hangs or reading any file IO error on client,custom kernel on server
Hi all.this is my first message in mail list, so correct me if I 'm wrong. I have a raspberry pi with kernel compiled from (sys-kernel/raspberrypi-source 3.6.11_r20130711,running nfsv4 server.To simplify problem, only a simple directory exported. Senge-Raspi ~ # cat /etc/exports # /etc/exports: NFS file systems being exported. See exports(5). /export *(fsid=0,rw,no_subtree_check,no_root_squash) Senge-Raspi ~ # ls -l /export/ total 4 -rw-r--r-- 1 root root 4 Nov 18 12:48 test Senge-Raspi ~ # cat /export/test foo And on my laptop, as nfs client. senge@Senge-Laptop ~ $ cat /etc/fstab # fs mountpointtype opts dump/pass # NOTE: If your BOOT partition is ReiserFS, add the notail option to opts. /dev/sda1 /boot ext4 noauto,noatime 1 2 /dev/sda3 / ext4 noatime 0 1 /dev/sda2 noneswap sw 0 0 /dev/sda4 /mnt/windowsntfs noauto 0 0 59.78.22.20:/ /raspi nfs4 rw,_netdev,auto,rsize=32768,wsize=32768 0 0 senge@Senge-Laptop ~ $ sudo rc-config restart nfsmount Restarting init script * Starting rpcbind ... [ ok ] * Starting NFS statd ... [ ok ] * Setting up RPC pipefs ... [ ok ] * Starting idmapd ... [ ok ] * Starting NFS sm-notify ... [ ok ] * Mounting NFS filesystems ... It hangs here. and in kernel message [19888.585247] RPC: Registered named UNIX socket transport module. [19888.585251] RPC: Registered udp transport module. [19888.585252] RPC: Registered tcp transport module. [19888.585253] RPC: Registered tcp NFSv4.1 backchannel transport module. [19889.214956] NFS: Registering the id_resolver key type [19889.214973] Key type id_resolver registered [19889.214974] Key type id_legacy registered [20054.134247] NFS: nfs4_discover_server_trunking unhandled error -512. Exiting with error EIO sometimes mount succeed, and directory can be accessed. but reading files return error:(without 'dmesg' changed) senge@Senge-Laptop ~ $ sudo rc-config restart nfsmount Restarting init script * Starting NFS sm-notify ... [ ok ] * Mounting NFS filesystems ... [ ok ] senge@Senge-Laptop ~ $ cat /raspi/test cat: /raspi/test: Input/Output error But I actually have nfs support on server: Senge-Raspi ~ # zcat /proc/config.gz | grep -i nfs # CONFIG_NFS_FS is not set CONFIG_NFSD=y CONFIG_NFSD_V2_ACL=y CONFIG_NFSD_V3=y CONFIG_NFSD_V3_ACL=y CONFIG_NFSD_V4=y # CONFIG_NFSD_FAULT_INJECTION is not set CONFIG_NFS_ACL_SUPPORT=y CONFIG_NFS_COMMON=y However, official pre-compiled kernel(sys-kernel/raspberrypi-image 3.6.11-p20130730) worked fine, Senge-Raspi ~ # zcat /proc/config.gz | grep -i nfs CONFIG_NFS_FS=y CONFIG_NFS_V2=y CONFIG_NFS_V3=y CONFIG_NFS_V3_ACL=y CONFIG_NFS_V4=y # CONFIG_NFS_SWAP is not set # CONFIG_NFS_V4_1 is not set CONFIG_ROOT_NFS=y CONFIG_NFS_FSCACHE=y # CONFIG_NFS_USE_LEGACY_DNS is not set CONFIG_NFS_USE_KERNEL_DNS=y CONFIG_NFSD=m CONFIG_NFSD_V2_ACL=y CONFIG_NFSD_V3=y CONFIG_NFSD_V3_ACL=y CONFIG_NFSD_V4=y # CONFIG_NFSD_FAULT_INJECTION is not set CONFIG_NFS_ACL_SUPPORT=y CONFIG_NFS_COMMON=y I have googled a lot, return few result...any idea appreciated.(sorry for poor English)
