luasocket 설치

소스를 받아서 풀고 

http://w3.impa.br/~diego/software/luasocket/home.html#download

# make

cd src; make all

make[1]: Entering directory `/usr/local/src/luasocket-2.0.2/src'

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o luasocket.o luasocket.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o timeout.o timeout.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o buffer.o buffer.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o io.o io.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o auxiliar.o auxiliar.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o options.o options.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o inet.o inet.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o tcp.o tcp.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o udp.o udp.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o except.o except.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o select.o select.c

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o usocket.o usocket.c

gcc  -O -shared -fpic -o socket.so.2.0.2 luasocket.o timeout.o buffer.o io.o auxiliar.o options.o inet.o tcp.o udp.o except.o select.o usocket.o

gcc  -DLUASOCKET_DEBUG  -pedantic -Wall -O2 -fpic   -c -o mime.o mime.c

gcc  -O -shared -fpic -o mime.so.1.0.2 mime.o

make[1]: Leaving directory `/usr/local/src/luasocket-2.0.2/src'

# make install

cd src; make all

make[1]: Entering directory `/usr/local/src/luasocket-2.0.2/src'

make[1]: `all'를 위해 할 일이 없습니다

make[1]: Leaving directory `/usr/local/src/luasocket-2.0.2/src'

cd src; mkdir -p /usr/local/share/lua/5.1

cd src; cp ltn12.lua socket.lua mime.lua /usr/local/share/lua/5.1

cd src; mkdir -p /usr/local/share/lua/5.1/socket

cd src; cp http.lua url.lua tp.lua ftp.lua smtp.lua /usr/local/share/lua/5.1/socket

cd src; mkdir -p /usr/local/lib/lua/5.1/socket

cd src; cp socket.so.2.0.2  /usr/local/lib/lua/5.1/socket/core.so

#cd src; mkdir -p /usr/local/share/lua/5.1/mime

#cd src; cp  /usr/local/share/lua/5.1/mime

cd src; mkdir -p /usr/local/lib/lua/5.1/mime

cd src; cp mime.so.1.0.2 /usr/local/lib/lua/5.1/mime/core.so

# lua

Lua 5.1.2  Copyright (C) 1994-2007 Lua.org, PUC-Rio

> require('socket')

stdin:1: module 'socket' not found:

        no field package.preload['socket']

        no file './socket.lua'

        no file '/usr/share/lua/5.1/socket.lua'

        no file '/usr/share/lua/5.1/socket/init.lua'

        no file '/usr/lib/lua/5.1/socket.lua'

        no file '/usr/lib/lua/5.1/socket/init.lua'

        no file './socket.so'

        no file '/usr/lib/lua/5.1/socket.so'

        no file '/usr/lib/lua/5.1/loadall.so'

stack traceback:

        [C]: in function 'require'

        stdin:1: in main chunk

        [C]: ?

socket 모듈을 찾지 못합니다.

# ln -s /usr/local/share/lua /usr/share/lua
# export LUA_CPATH=/usr/local//lib/lua/5.1/socket/core.so

심볼릭 링크로 연결해 주고,

LUA_CPATH 를 연결

# lua

Lua 5.1.2  Copyright (C) 1994-2007 Lua.org, PUC-Rio

> require('socket')

>

동작합니다.

2010-12-07 추가 내용

>  require('socket')

error loading module 'socket' from file '/usr/local//lib/lua/5.1/socket/core.so':

        /usr/local//lib/lua/5.1/socket/core.so: undefined symbol: luaopen_socket

stack traceback:

        [C]: ?

        [C]: in function 'require'

        stdin:1: in main chunk

        [C]: ?

>

위와 같은 에러가 발생할 경우

소스에서 2개의 파일을 수정해서 해결했습니다.

luasocket.c

수정 전

LUASOCKET_API int luaopen_socket_core(lua_State *L) { 

수정 후

LUASOCKET_API int luaopen_socket(lua_State *L) {

luasocket.h

수정 전

LUASOCKET_API int luaopen_socket_core(lua_State *L);

수정 후

LUASOCKET_API int luaopen_socket(lua_State *L);

* LUA_CPATH 를 이용해서 라이브러리를 잡아주는 것이 좋습니다.

참고1)

LUA_CPATH 환경변수를 셋팅하지 않고 lua 를 실행 후에 package.cpath 를 셋팅할 수도 있습니다.

package.cpath="/usr/local//lib/lua/5.1/socket/core.so"

참고2) 사용환경입니다.

# cat /etc/issue

Fedora release 8 (Werewolf)

# rpm -q lua

lua-5.1.2-1.fc8

# rpm -ql lua

/usr/bin/lua

/usr/bin/luac

/usr/lib/liblua-5.1.so

/usr/share/doc/lua-5.1.2

/usr/share/doc/lua-5.1.2/COPYRIGHT

/usr/share/doc/lua-5.1.2/HISTORY

/usr/share/doc/lua-5.1.2/README

/usr/share/doc/lua-5.1.2/amazon.gif

/usr/share/doc/lua-5.1.2/contents.html

/usr/share/doc/lua-5.1.2/cover.png

/usr/share/doc/lua-5.1.2/logo.gif

/usr/share/doc/lua-5.1.2/lua.css

/usr/share/doc/lua-5.1.2/lua.html

/usr/share/doc/lua-5.1.2/luac.html

/usr/share/doc/lua-5.1.2/manual.css

/usr/share/doc/lua-5.1.2/manual.html

/usr/share/doc/lua-5.1.2/readme.html

/usr/share/man/man1/lua.1.gz

/usr/share/man/man1/luac.1.gz

참고3) buffer_init 함수 이슈.

buffer_init 함수명 때문에 lighttpd 의 mod_magnet 과  함께 사용할 때 문제가 생긴다.

http://redmine.lighttpd.net/issues/1139 에서  참조했다.

That is obviously not a lighttpd bug. In fact memcache.lua uses luasockets. Luasockets has a buffer_init function that is called when sending data. Unfortunatly lighty also has a buffer_init method which overwrites luasocket's buffer_int method. Therefore the buffer get's not initialized correct and when the process tries to access buf->tm it fails with a null pointer (sigsegv).

In my opinion that is not a lighttpd bug, but in fact is a result of bad naming in luasockets as a library should at least prefix it's exported methods.

buffer_init 함수명을 임의로 변경하여 해결.