{"image_url":null,"provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fso-wh.at%2Fentry%2F20111205%2Fp1\" title=\" srand\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b7\u30fc\u30c9 - so what\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"winebarrel","categories":["RUBY"],"url":"https://so-wh.at/entry/20111205/p1","height":"190","version":"1.0","title":" srand\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b7\u30fc\u30c9","type":"rich","blog_url":"https://so-wh.at/","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/winebarrel/","width":"100%","published":"2011-12-05 00:00:00","blog_title":"so what","description":"\u3055\u3089\u3063\u3068\u8aad\u3080\u304b\u304e\u308a\u3001/dev/urandom\u3068\u6642\u523b\u3068pid\u3068\u5909\u6570seed\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u30b7\u30fc\u30c9\u306b\u3044\u3066\u3044\u308b\u6a21\u69d8\u3002 S_ISCHR\u3067\u4f55\u3092\u5224\u5225\u3057\u3066\u3044\u308b\u3093\u3060\u308d\u3046\uff1f static VALUE random_seed() { static int n = 0; struct timeval tv; int fd; struct stat statbuf; int seed_len; BDIGIT *digits; unsigned long *seed; NEWOBJ(big, struct RBignum); OBJSETUP(big, rb_cBignum, T_BIGNUM); seed_len = 4\u2026"}