{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fte2u.hatenablog.jp%2Fentry%2F20090827%2Fp1\" title=\" system\u95a2\u6570\u3067\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u5b9f\u884c - \u4f5c\u696d\u30ce\u30fc\u30c8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://te2u.hatenablog.jp/entry/20090827/p1","title":" system\u95a2\u6570\u3067\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u5b9f\u884c","published":"2009-08-27 00:00:00","type":"rich","version":"1.0","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/te2u/","width":"100%","blog_title":"\u4f5c\u696d\u30ce\u30fc\u30c8","blog_url":"https://te2u.hatenablog.jp/","author_name":"te2u","provider_url":"https://hatena.blog","image_url":null,"categories":["PHP"],"height":"190","description":"\u30cf\u30de\u3063\u305f\u306e\u3067\u30e1\u30e2\u3002 $ vi sleep.sh #!/bin/sh sleep 10 $ vi sleep.php <?php system(\"/bin/sh ./sleep.sh > /dev/null &\"); echo \"ok\\n\"; $ php sleep.php ok $ system\u95a2\u6570\u306e\u6700\u5f8c\u306b'&'\u3092\u3064\u3051\u308b\u3002 \u6a19\u6e96\u51fa\u529b\u3092\u3069\u3053\u304b\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3059\u308b\u3002 '&'\u3092\u3064\u3051\u3066\u3082\u6a19\u6e96\u51fa\u529b\u3092\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3057\u306a\u3044\u3068\u3001\u7d42\u4e86\u3059\u308b\u307e\u3067\u5f85\u305f\u3055\u308c\u308b\u3002 via 404 Not Found"}