为了在播放机上实现NFS服务器的功能，我们已经在uClibc中打开了完整RPC支持，并且在新编译的内核中打开了NFS服务器支持。此外还有两个软件包也是提供NFS服务所必需的：portmap和nfs-utils。portmap为RPC程序提供端口映射服务，nfs-utils则是使用内核NFS服务器的支持程序。编译portmap1. 下载portmap_5beta: ftp://ftp.porcupine.org/pub/security/portmap_5beta.tar.gz2. 打这个补丁: portmap_5beta.patch.zip （补丁来自buildroot-2009.11，我只是把多个补丁合并成一个）3. $ make CC=mipsel-linux-gcc4. $ mipsel-linux-strip portmap编译nfs-utils1. 下载nfs-utils-1.1.1: http://nchc.dl.sourceforge.net/project/nfs/nfs-utils/1.1.1/nfs-utils-1.1.1.tar.gz2. 打这个补丁: nfs-utils-1.1.1-uclibc.patch.zip （在网上找到的，来源记不清了，我稍加了修改）3. 运行配置脚本：
1 . / configure -- build = i686 - linux -- host = mipsel - linux -- disable - nfsv4 -- disable - gss -- disable - uuid -- disable - mount -- without - tcp - wrappers -- with - gnu - ld CC = mipsel - linux - gcc CPP = mipsel - linux - cpp AR = mipsel - linux - ar STRIP = mipsel - linux - strip RANLIB = mipsel - linux - ranlib LD = mipsel - linux - ld 4. $ make 5. 安装到/home/user/dist/nfs-utils目录 1 $ make DESTDIR =/ home / user / dist / nfs - utils install - strip 在制作固件时，我们只需要几个编译好的程序： portmap, rpc.statd, rpc.nfsd, rpc.mountd, exportfs。其中 portmap 放到 /sbin下，其余的放到 /usr/sbin下。 此外还需要一个NFS服务启动脚本S60nfs，放在/etc/init.d目录下。下载脚本 S60nfs.zip (来自buildroot，我把portmap的启动加进去了） 1 # !/ bin / sh 2 # 3 # nfs This shell script takes care of starting and stopping 4 # the NFS services. Stolen from RedHat FC5. 5 6 [ - x / sbin / portmap ] || exit 0 7 [ - x / usr / sbin / rpc.statd ] || exit 0 8 [ - x / usr / sbin / rpc.nfsd ] || exit 0 9 [ - x / usr / sbin / rpc.mountd ] || exit 0 10 [ - x / usr / sbin / exportfs ] || exit 0 11 12 # Don ' t fail if /etc/exports doesn ' t exist; create a bare - bones version and continue . 13 [ - r / etc / exports ] || / 14 { touch / etc / exports && chmod u + rw,g + r,o + r / etc / exports ; } || / 15 { echo " /etc/exports does not exist " ; exit 0 ; } 16 17 # The / var / lib / nfs directory is actually on a tmpfs filesystem. 18 mkdir - p / var / lib / nfs / sm 19 mkdir - p / var / lib / nfs / sm.bak 20 touch / var / lib / nfs / etab 21 touch / var / lib / nfs / rmtab 22 touch / var / lib / nfs / state 23 touch / var / lib / nfs / xtab 24 25 start() { 26 # Start daemons. 27 echo - n " Starting port mapper: " 28 portmap 29 echo " done " 30 31 echo - n " Starting NFS statd: " 32 rpc.statd 33 touch / var / lock / subsys / nfslock 34 echo " done " 35 36 echo - n " Starting NFS services: " 37 / usr / sbin / exportfs - r 38 rpc.statd 39 echo " done " 40 41 echo - n " Starting NFS daemon: " 42 rpc.nfsd 2 43 echo " done " 44 45 echo - n " Starting NFS mountd: " 46 rpc.mountd 47 echo " done " 48 touch / var / lock / subsys / nfs 49 } 50 51 stop() { 52 # Stop daemons. 53 echo - n " Shutting down NFS mountd: " 54 killall - q rpc.mountd 55 echo " done " 56 57 echo " Shutting down NFS daemon: " 58 kill - 9 `pidof nfsd` 2 >/ dev / null 59 echo " done " 60 61 echo - n " Shutting down NFS services: " 62 / usr / sbin / exportfs - au 63 rm - f / var / lock / subsys / nfs 64 killall - q rpc.statd 65 echo " done " 66 67 echo - n " Stopping NFS statd: " 68 killall - q rpc.statd 69 echo " done " 70 rm - f / var / lock / subsys / nfslock 71 72 echo - n " Stopping port mapper: " 73 killall - q portmap 74 echo " done " 75 } 76 77 # See how we were called. 78 case " $1 " in 79 start) 80 start 81 ;; 82 stop) 83 stop 84 ;; 85 restart) 86 stop 87 start 88 ;; 89 reload) 90 / usr / sbin / exportfs - r 91 touch / var / lock / subsys / nfs 92 ;; 93 * ) 94 echo " Usage: nfs {start|stop|reload} " 95 exit 1 96 esac 97 98 exit 0