{"id":817,"date":"2008-01-28T02:00:00","date_gmt":"2008-01-27T17:00:00","guid":{"rendered":"https:\/\/ecoop.net\/memo\/2008-01-28-2.html"},"modified":"2026-08-10T14:42:27","modified_gmt":"2026-08-10T05:42:27","slug":"2008-01-28-2","status":"publish","type":"post","link":"https:\/\/www.ecoop.net\/memo\/archives\/2008-01-28-2.html","title":{"rendered":"tips – \u5b9f\u884c\u6642\u306b\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u512a\u5148\u9806\u4f4d\u3092\u5909\u3048\u308b(\u30b7\u30f3\u30dc\u30eb\u91cd\u8907\u6642\u306e\u52d5\u4f5c)"},"content":{"rendered":"

\nLinux \u3067\u306f\u8907\u6570\u306e\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea(*.so)\u306b\u540c\u3058\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u91cd\u8907\u3059\u308b\u95a2\u6570\u306b\u3064\u3044\u3066\u306f\u5148\u306b\u8aad\u307f\u8fbc\u307e\u308c\u305f\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u5229\u7528\u3055\u308c\u3001\u305d\u306e\u4ed6\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5b9a\u7fa9\u3055\u308c\u308b\u91cd\u8907\u30b7\u30f3\u30dc\u30eb\u306b\u3064\u3044\u3066\u306f\u7121\u8996\u3055\u308c\u307e\u3059\u3002
\n 
\n\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30ed\u30fc\u30c9\u9806\u5e8f\u306f ld \u3067\u306e\u30ea\u30f3\u30af\u9806\u306b\u306a\u308a\u307e\u3059\u3002
\n\u307e\u305f\u3001\u65e2\u5b58\u306e\u5b9f\u884c\u53ef\u80fd\u30d5\u30a1\u30a4\u30eb\u306e\u30ed\u30fc\u30c9\u9806\u5e8f\u3092\u8abf\u3079\u308b\u306b\u306f ldd \u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n

$ gcc src.c -o foo -lc -lm # libc.so, libm.so \u306e\u9806\u306b\u30ed\u30fc\u30c9
\n$ ldd foo # foo \u3067\u306f libc.so \u304c\u512a\u5148\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d
\n        libc.so.6 => \/lib\/tls\/libc.so.6 (0x00c07000)
\n        libm.so.6 => \/lib\/tls\/libm.so.6 (0x00d35000)
\n        \/lib\/ld-linux.so.2 (0x00bed000)
\n$ gcc src.c -o bar -lm -lc # \u540c\u3058\u30bd\u30fc\u30b9\u306b\u5bfe\u3057\u3066\u30ea\u30f3\u30af\u9806\u5e8f\u3092\u5165\u308c\u66ff\u3048\u3066 bar \u4f5c\u6210\u3002
\n$ ldd bar # bar \u3067\u306f libm.so \u304c\u512a\u5148\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d
\n        libm.so.6 => \/lib\/tls\/libm.so.6 (0x00d35000)
\n        libc.so.6 => \/lib\/tls\/libc.so.6 (0x00c07000)
\n        \/lib\/ld-linux.so.2 (0x00bed000)\n<\/p><\/blockquote>\n

 
\n\u4eca\u56de\u306e\u672c\u984c\u3001\u3069\u3046\u3084\u3063\u3066\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u512a\u5148\u3059\u308b\u304b\u3092\u5b9f\u884c\u6642\u306b\u6c7a\u3081\u308b\u304b\uff1f\u3067\u3059\u304c\u3001
\nLD_PRELOAD \u3092\u4f7f\u3046\u3053\u3068\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30ed\u30fc\u30c9\u9806\u3092\u5165\u308c\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n \n<\/p>\n

> \n<\/p><\/blockquote>\n

$ # LD_PRELOAD \u306b \/lib\/tls\/libc.so.6 (libc.so \u3078\u306e\u30d1\u30b9)\u3092\u6307\u5b9a
\n$ LD_PRELOAD=\/lib\/tls\/libc.so.6
\n$ ldd bar # \u512a\u5148\u9806\u4f4d\u304c\u5909\u308f\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d
\n        \/lib\/tls\/libc.so.6 (0x00c07000)
\nlibm.so.6 => \/lib\/tls\/libm.so.6 (0x00d35000)
\n        \/lib\/ld-linux.so.2 (0x00bed000)\n<\/p>\n

\u3061\u306a\u307f\u306b\u3001LD_PRELOAD \u3092\u8a2d\u5b9a\u3059\u308b\u3068\u3001(setuid\/setgid \u3055\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u306a\u3069)\u4e00\u90e8\u3092\u9664\u304f\u307b\u3068\u3093\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4efb\u610f\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4e8b\u524d\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002
\n\u3053\u308c\u3092\u5229\u7528\u3059\u308b\u3068\u4efb\u610f\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u5b9a\u7fa9\u95a2\u6570\u3092\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059(\u53c2\u8003:hook_tcp.so)\u3002
\n 
\n\u53c2\u8003:
\n– \u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f5c\u6210<\/a>(HP \u30c6\u30af\u30cb\u30ab\u30eb\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8)
\n 
\n– hook_tcp.so(\u30c1\u30fc\u30e0\u30c1\u30c9\u30ea)\n<\/p>\n

What is hook_tcp.so:
\nLD_PRELOAD\u3092\u5229\u7528\u3057\u3066\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u3067\u5b9f\u884c\u3055\u308c\u308b connect()\u306e\u63a5\u7d9a\u5148\u3092syslog\u3078\u8a18\u9332\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002\n<\/p><\/blockquote>\n

\u3068\u306e\u3053\u3068\u3067\u3001libc.so \u306e CONNECT(2) \u3092 hook \u3057\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002
\n 
\n– 4.17. LIDS \u3092\u4f7f\u3046\u6642\u306f\u3001LD_PRELOAD \u74b0\u5883\u5909\u6570\u306b\u6ce8\u610f\u3057\u305f\u65b9\u304c\u3044\u3044\u3067\u3059\u304b\uff1f(LIDS FAQ)<\/p>\n","protected":false},"excerpt":{"rendered":"

Linux \u3067\u306f\u8907\u6570\u306e\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea(*.so)\u306b\u540c\u3058\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u91cd\u8907\u3059\u308b\u95a2\u6570\u306b\u3064\u3044\u3066\u306f\u5148\u306b\u8aad\u307f\u8fbc\u307e\u308c\u305f\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u5229\u7528\u3055\u308c\u3001\u305d\u306e\u4ed6\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5b9a\u7fa9\u3055\u308c\u308b\u91cd\u8907\u30b7\u30f3\u30dc\u30eb\u306b\u3064\u3044\u3066\u306f\u7121\u8996\u3055\u308c\u307e\u3059\u3002 &nbs … \u7d9a\u304d\u3092\u8aad\u3080 tips – \u5b9f\u884c\u6642\u306b\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u512a\u5148\u9806\u4f4d\u3092\u5909\u3048\u308b(\u30b7\u30f3\u30dc\u30eb\u91cd\u8907\u6642\u306e\u52d5\u4f5c)<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[141],"tags":[25,20],"class_list":["post-817","post","type-post","status-publish","format-standard","hentry","category-lifehack","tag-freebsd","tag-linux"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=817"}],"version-history":[{"count":2,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/817\/revisions"}],"predecessor-version":[{"id":1724,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/817\/revisions\/1724"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}