{"id":65,"date":"2011-12-28T22:30:00","date_gmt":"2011-12-29T06:30:00","guid":{"rendered":"http:\/\/h2plus.biz\/hiromitsu\/?p=65"},"modified":"2011-12-28T22:30:00","modified_gmt":"2011-12-29T06:30:00","slug":"bash%e3%81%a7%e3%82%b5%e3%83%96%e3%83%8d%e3%83%83%e3%83%88%e3%83%9e%e3%82%b9%e3%82%af%e3%81%ae%e6%ad%a3%e5%bd%93%e6%80%a7%e3%82%92%e6%a4%9c%e8%a8%bc%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/h2plus.biz\/hiromitsu\/entry\/65","title":{"rendered":"bash\u3067\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e\u6b63\u5f53\u6027\u3092\u691c\u8a3c\u3059\u308b"},"content":{"rendered":"

bash\u3092\u4f7f\u3063\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u8a2d\u5b9a\u3092\u3059\u308b\u305f\u3081\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u3044\u3066\u305f\u3068\u304d\u306b\u3001\u5165\u529b\u3055\u308c\u305f\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u691c\u8a3c\u3059\u308b\u30b3\u30de\u30f3\u30c9\u304c\u306a\u304b\u3063\u305f\u306e\u3067\u81ea\u524d\u3067\u4f5c\u308b\u3053\u3068\u306b\u3057\u305f\u3002\u307e\u305a\u3001\u5165\u529b\u5024\u304cIPv4\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a\u306f\u3001\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u3063\u305f\u4f8b<\/a>\u306a\u3069\u3082\u3042\u308b\u304c\u3001ipcalc\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3063\u305f\u65b9\u304c\u697d\u30c1\u30f3\u3002<\/p>\n

\r\n#!\/bin\/bash\r\n\r\nread mask\r\nif ! ipcalc -c $mask > \/dev\/null 2>&1; then\r\n    echo "ERROR: Invalid format"\r\n    exit 1\r\nfi\r\n<\/pre>\n

\n\u540c\u3058\u3088\u3046\u306bipcalc\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3063\u3066\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3082\u691c\u8a3c\u3067\u304d\u306a\u3044\u3082\u306e\u304b\u3068\u601d\u3044\u3001<\/p>\n
\r\nif ! ipcalc -n 192.168.1.1 $mask > \/dev\/null 2>&1; then\r\n    echo "ERROR: Invalid subnet mask"\r\n    exit 1\r\nfi\r\n<\/pre>\n
\u3068\u8a66\u3057\u305f\u304c\u307e\u3063\u305f\u304f\u610f\u5473\u304c\u306a\u304b\u3063\u305f\u3002<\/p>\n
ipcalc\u30b3\u30de\u30f3\u30c9\u306e\u5177\u4f53\u7684\u306a\u5b9f\u884c\u7d50\u679c\u3092\u6319\u3052\u3088\u3046\u3002<\/p>\n
\r\n$ ipcalc -n 192.168.1.254 255.255.255.0 > \/dev\/null 2>&1; echo $?\r\n0\r\n$ ipcalc -n 192.168.1.254 255.255.255.250 > \/dev\/null 2>&1; echo $?\r\n0\r\n$ ipcalc -n 192.168.1.254 255.255.0.255 > \/dev\/null 2>&1; echo $?\r\n0\r\n<\/pre>\n
\u300c255.255.255.250\u300d\u3082\u300c255.255.0.255\u300d\u3082\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3068\u3057\u3066\u306f\u4e0d\u6b63\u306a\u5024\u3060\u304c\u3001ipcalc\u306f\u6b63\u5e38\u7d42\u4e86\u3057\u3066\u3057\u307e\u3046\u3002\u3042\u307e\u308a\u53b3\u5bc6\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u306a\u3044\u3093\u3060\u306a\u3002<\/p>\n
\u6b63\u898f\u8868\u73fe\u3067\u3082\u66f8\u3051\u308b\u81ea\u4fe1\u304c\u306a\u304b\u3063\u305f\u306e\u3067\u529b\u6280\u3067\u66f8\u3044\u3066\u307f\u305f\uff08\u5192\u982d\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u7d9a\u304d\uff09\u3002<\/p>\n
\r\nvalid=0\r\nfilled=0\r\n\r\nfor n in `echo $mask | sed 's\/\\.\/ \/g'`; do\r\n    case "$n" in\r\n        255|254|252|248|240|224|192|128)\r\n        [ $filled -eq 0 ] && valid=0\r\n        ;;\r\n        0)\r\n        ;;\r\n        *)\r\n        valid=0\r\n        ;;\r\n    esac\r\n\r\n    [ $valid -eq 0 ] && break\r\n    [ $n -ne 255 ] && filled=0\r\ndone\r\n\r\nif [ $valid -eq 0 ]; then\r\n    echo "ERROR: Invalid subnet mask"\r\n    exit 1\r\nfi\r\n\r\necho "$mask is valid subnet mask"\r\n<\/pre>\n
\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u30d3\u30c3\u30c8\u8868\u73fe\u3057\u305f\u3068\u304d\u306b\u30010\u304c\u51fa\u73fe\u3057\u305f\u30d3\u30c3\u30c8\u3088\u308a\u4e0b\u4f4d\u306e\u30d3\u30c3\u30c8\u306f\u3059\u3079\u30660\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\uff08\u9014\u4e2d\u306e\u30d3\u30c3\u30c8\u304c\u7acb\u3063\u3066\u3044\u308b\u3068NG\uff09\u306e\u3067\u3001\u305d\u308c\u3092\u5909\u6570filled\u3092\u4f7f\u3063\u3066\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u30ef\u30b1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
bash\u3092\u4f7f\u3063\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u8a2d\u5b9a\u3092\u3059\u308b\u305f\u3081\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u66f8\u3044\u3066\u305f\u3068\u304d\u306b\u3001\u5165\u529b\u3055\u308c\u305f\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u691c\u8a3c\u3059\u308b\u30b3\u30de\u30f3\u30c9\u304c\u306a\u304b\u3063\u305f\u306e\u3067\u81ea\u524d\u3067\u4f5c\u308b\u3053\u3068\u306b\u3057\u305f\u3002\u307e\u305a\u3001\u5165\u529b\u5024\u304cIPv4\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u6b63\u3057\u3044 […]<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[29,27,30,31,28],"_links":{"self":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts\/65"}],"collection":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/comments?post=65"}],"version-history":[{"count":0,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/posts\/65\/revisions"}],"wp:attachment":[{"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/media?parent=65"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/categories?post=65"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/h2plus.biz\/hiromitsu\/wp-json\/wp\/v2\/tags?post=65"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}