{"id":2528,"date":"2010-01-24T23:18:14","date_gmt":"2010-01-24T14:18:14","guid":{"rendered":"http:\/\/yasu2.prosou.nu\/blog\/index.php\/2010\/01\/24\/mmap_howto\/"},"modified":"2010-01-24T23:18:14","modified_gmt":"2010-01-24T14:18:14","slug":"mmap_howto","status":"publish","type":"post","link":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/2010\/01\/24\/2528\/","title":{"rendered":"mmap() HOWTO"},"content":{"rendered":"<p>\n\u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u66f8\u3044\u3066\u308b\u3068\u3001mmap() \u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u306a\u30fc\u3001\u3068\u304b\u601d\u3046\u308f\u3051\u3067\u3002<\/p>\n<ul>\n<li><a href=\"http:\/\/funini.com\/kei\/mmap\/mmap_api.shtml\">\u666e\u901a\u306e\u4eba\u5411\u3051\u306emmap()\u306e\u4f7f\u3044\u65b9<\/a>\n<li><a href=\"http:\/\/www-online.kek.jp\/~yasu\/Kenshu\/mmap-driver.html\">Linux \u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u66f8\u304f\u4eba\u5411\u3051\u306emmap()\u306e\u4f7f\u3044\u65b9<\/a>\n<\/ul>\n<p>\n\u307f\u305f\u3044\u306a\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u3001\u7406\u89e3\u3067\u304d\u305f\u6c17\u304c\u3059\u308b\u306d\u3002\u300cLinux \u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u300d\u3068\u3044\u3046\u672c\u304c\u3059\u3054\u3044\u308f\u3051\u3067\u3059\u304c\u3001\u3042\u308c\u3060\u3051\u3060\u3068\u3061\u3087\u3063\u3068\u4e0d\u5341\u5206\u306a\u611f\u3058\u3060\u3063\u305f\u306e\u3060\u3002<\/p>\n<p>\n\u305d\u3046\u3044\u3048\u3070\u666e\u901a\u306b\u30d5\u30a1\u30a4\u30eb\u3092 mmap() \u3057\u3066\u8aad\u307f\u66f8\u304d\u3001\u3068\u3044\u3046\u306e\u3082\u3084\u3063\u305f\u3053\u3068\u306a\u3044\u3084\u3001\u3068\u601d\u3063\u305f\u306e\u3067\u3001\u3061\u3087\u3063\u3068\u66f8\u3044\u3066\u307f\u305f\u3002<\/p>\n<pre>\n#include &lt;stdio.h&gt;\n#include &lt;sys\/mman.h&gt;\n#include &lt;fcntl.h&gt;\n#include &lt;unistd.h&gt;\nint main(){\nint fd;\nchar* p;\nint i;\nfd = open(\"textfile\", O_RDWR);\nif(fd<0) printf(\"can't open!\\n\");\nprintf(\"fd=%d\\n\", fd);\np= (char*)mmap(NULL, 100, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED, fd, 0);\nprintf(\"p=%lx\\n\", (long unsigned int)p);\nif(p==MAP_FAILED) printf(\"can't mmap!\\n\");\nfor(i=0; i<100; i++)\nputchar(p[i]);\nfor(i=0; i<10; i++)\np[i]=0x30+i;\nclose(fd);\nreturn 0;\n}\n<\/pre>\n<p>\n\u3053\u308c\u3067\u3001\u914d\u5217\u306e\u5024\u3092\u5909\u66f4\u3057\u305f\u901a\u308a\u306b\u3061\u3083\u3093\u3068\u30d5\u30a1\u30a4\u30eb\u304c\u66f8\u304d\u63db\u308f\u308b\u3002Unix \u306f\u304b\u3063\u3053\u3044\u3044\u4ed5\u639b\u3051\u304c\u3044\u3063\u3071\u3044\u3042\u308b\u306a\u30fc\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u66f8\u3044\u3066\u308b\u3068\u3001mmap() \u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u306a\u30fc\u3001\u3068\u304b\u601d\u3046\u308f\u3051\u3067\u3002 \u666e\u901a\u306e\u4eba\u5411\u3051\u306emmap()\u306e\u4f7f\u3044\u65b9 Linux \u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u66f8\u304f\u4eba\u5411\u3051\u306emmap()\u306e\u4f7f\u3044\u65b9 \u307f\u305f\u3044\u306a\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u3001\u7406\u89e3\u3067\u304d\u305f\u6c17\u304c &hellip; <a href=\"https:\/\/yasu2.prosou.nu\/blog\/index.php\/2010\/01\/24\/2528\/\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;mmap() HOWTO&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[6,4],"tags":[],"class_list":["post-2528","post","type-post","status-publish","format-standard","hentry","category-unix-","category-4"],"_links":{"self":[{"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/2528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=2528"}],"version-history":[{"count":0,"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/2528\/revisions"}],"wp:attachment":[{"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=2528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=2528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yasu2.prosou.nu\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=2528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}