{"id":99186,"date":"2026-09-02T01:41:04","date_gmt":"2026-09-01T17:41:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99186.html"},"modified":"2026-09-02T01:41:04","modified_gmt":"2026-09-01T17:41:04","slug":"linux%e7%b3%bb%e7%bb%9f%e7%af%8725-%e9%80%9a%e4%bf%a1%ef%bc%88%e4%b8%89%ef%bc%89%ef%bc%9asystem-v-%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%ef%bc%9a%e4%bb%8e%e9%a1%b5%e8%a1%a8%e6%98%a0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99186.html","title":{"rendered":"Linux\u7cfb\u7edf\u7bc725\u2014\u2014\u901a\u4fe1\uff08\u4e09\uff09\uff1aSystem V \u5171\u4eab\u5185\u5b58\uff1a\u4ece\u9875\u8868\u6620\u5c04\u5230 shmget\/shmat \u4e00\u6587\u641e\u61c2"},"content":{"rendered":"<h2 id=\"%E2%80%8B%E7%BC%96%E8%BE%91\" style=\"text-align:center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"200\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260901174102-6a970e2e50f5c.jpg\" width=\"200\" 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id=\"%E4%B8%80%E3%80%81%E4%B8%80%E4%B8%AA%E9%97%AE%E9%A2%98%EF%BC%9A%E7%AE%A1%E9%81%93%E4%BC%A0%E5%A4%A7%E5%9D%97%E6%95%B0%E6%8D%AE%EF%BC%8C%E5%A4%9F%E5%BF%AB%E5%90%97%EF%BC%9F-toc\" style=\"margin-left:40px\">\u4e00\u3001\u4e00\u4e2a\u95ee\u9898&#xff1a;\u7ba1\u9053\u4f20\u5927\u5757\u6570\u636e&#xff0c;\u591f\u5feb\u5417&#xff1f;<\/p>\n<p id=\"%E4%BA%8C%E3%80%81%E4%B8%80%E5%8F%A5%E8%AF%9D%E7%BB%93%E8%AE%BA%EF%BC%9A%E4%BB%80%E4%B9%88%E6%98%AF%20System%20V%20%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98-toc\" style=\"margin-left:40px\">\u4e8c\u3001\u4e00\u53e5\u8bdd\u7ed3\u8bba&#xff1a;\u4ec0\u4e48\u662f System V \u5171\u4eab\u5185\u5b58<\/p>\n<p id=\"%E4%B8%89%E3%80%81System%20V%20%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9A%E6%A0%87%E5%87%86%E8%BF%98%E6%98%AF%20Linux%20%E4%B8%93%E5%B1%9E%EF%BC%9F-toc\" style=\"margin-left:40px\">\u4e09\u3001System V \u662f\u4ec0\u4e48&#xff1a;\u6807\u51c6\u8fd8\u662f Linux \u4e13\u5c5e&#xff1f;<\/p>\n<p id=\"%E5%9B%9B%E3%80%81%E5%BA%95%E5%B1%82%E5%8E%9F%E7%90%86%EF%BC%9A%E4%B8%A4%E5%9D%97%E8%99%9A%E6%8B%9F%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%A6%82%E4%BD%95%E6%8C%87%E5%90%91%E5%90%8C%E4%B8%80%E5%9D%97%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98-toc\" style=\"margin-left:40px\">\u56db\u3001\u5e95\u5c42\u539f\u7406&#xff1a;\u4e24\u5757\u865a\u62df\u5730\u5740&#xff0c;\u5982\u4f55\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58<\/p>\n<p id=\"4.1%20%E5%85%88%E5%9B%9E%E5%BF%86%EF%BC%9A%E8%BF%9B%E7%A8%8B%E4%B9%8B%E9%97%B4%E6%98%AF%22%E9%9A%94%E7%A6%BB%22%E7%9A%84-toc\" style=\"margin-left:80px\">4.1 \u5148\u56de\u5fc6&#xff1a;\u8fdb\u7a0b\u4e4b\u95f4\u662f&#034;\u9694\u79bb&#034;\u7684<\/p>\n<p id=\"4.2%20%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E7%9A%84%22%E9%AD%94%E6%B3%95%22%EF%BC%9A%E8%AE%A9%E9%A1%B5%E8%A1%A8%E6%8C%87%E5%90%91%E5%90%8C%E4%B8%80%E5%9D%97%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98-toc\" style=\"margin-left:80px\">4.2 \u5171\u4eab\u5185\u5b58\u7684&#034;\u9b54\u6cd5&#034;&#xff1a;\u8ba9\u9875\u8868\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58<\/p>\n<p id=\"4.3%20%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BF%AB%EF%BC%9F%22%E4%B8%8D%E7%BB%8F%E8%BF%87%E5%86%85%E6%A0%B8%22%E6%8C%87%E7%9A%84%E6%98%AF%E4%BB%80%E4%B9%88-toc\" style=\"margin-left:80px\">4.3 \u4e3a\u4ec0\u4e48\u5feb&#xff1f;&#034;\u4e0d\u7ecf\u8fc7\u5185\u6838&#034;\u6307\u7684\u662f\u4ec0\u4e48<\/p>\n<p id=\"%E4%BA%94%E3%80%81%E5%86%85%E6%A0%B8%E6%80%8E%E4%B9%88%E7%AE%A1%E7%90%86%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%EF%BC%9Ashmid_ds%20%E7%BB%93%E6%9E%84-toc\" style=\"margin-left:40px\">\u4e94\u3001\u5185\u6838\u600e\u4e48\u7ba1\u7406\u5171\u4eab\u5185\u5b58&#xff1a;shmid_ds \u7ed3\u6784<\/p>\n<p id=\"%E5%85%AD%E3%80%81%E4%BA%94%E4%B8%AA%E6%8E%A5%E5%8F%A3%E9%80%90%E4%B8%AA%E6%8B%86%EF%BC%9Aftok%20%2F%20shmget%20%2F%20shmat%20%2F%20shmdt%20%2F%20shmctl-toc\" style=\"margin-left:40px\">\u516d\u3001\u4e94\u4e2a\u63a5\u53e3\u9010\u4e2a\u62c6&#xff1a;ftok \/ shmget \/ shmat \/ shmdt \/ shmctl<\/p>\n<p id=\"6.1%20ftok%20%E2%80%94%E2%80%94%20%E5%9C%A8%E7%94%A8%E6%88%B7%E5%B1%82%E6%9E%84%E9%80%A0%E4%B8%80%E4%B8%AA%20key-toc\" style=\"margin-left:80px\">6.1 ftok \u2014\u2014 \u5728\u7528\u6237\u5c42\u6784\u9020\u4e00\u4e2a key<\/p>\n<p id=\"6.2%20shmget%20%E2%80%94%E2%80%94%20%E5%88%9B%E5%BB%BA%E6%88%96%E8%8E%B7%E5%8F%96%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98-toc\" style=\"margin-left:80px\">6.2 shmget \u2014\u2014 \u521b\u5efa\u6216\u83b7\u53d6\u5171\u4eab\u5185\u5b58<\/p>\n<p id=\"6.3%20shmat%20%E2%80%94%E2%80%94%20%E6%8C%82%E6%8E%A5%E5%88%B0%E8%BF%9B%E7%A8%8B%E5%9C%B0%E5%9D%80%E7%A9%BA%E9%97%B4-toc\" style=\"margin-left:80px\">6.3 shmat \u2014\u2014 \u6302\u63a5\u5230\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4<\/p>\n<p id=\"6.4%20shmdt%20%E2%80%94%E2%80%94%20%E4%B8%8E%E5%BD%93%E5%89%8D%E8%BF%9B%E7%A8%8B%22%E5%8E%BB%E5%85%B3%E8%81%94%22-toc\" style=\"margin-left:80px\">6.4 shmdt \u2014\u2014 \u4e0e\u5f53\u524d\u8fdb\u7a0b&#034;\u53bb\u5173\u8054&#034;<\/p>\n<p id=\"6.5%20shmctl%20%E2%80%94%E2%80%94%20%E6%8E%A7%E5%88%B6%20%2F%20%E5%88%A0%E9%99%A4%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98-toc\" style=\"margin-left:80px\">6.5 shmctl \u2014\u2014 \u63a7\u5236 \/ \u5220\u9664\u5171\u4eab\u5185\u5b58<\/p>\n<p id=\"%E4%B8%83%E3%80%81IPC_CREAT%20%E4%B8%8E%20IPC_EXCL%EF%BC%9A%E5%88%B0%E5%BA%95%E5%87%A0%E4%B8%AA%E6%84%8F%E6%80%9D-toc\" style=\"margin-left:40px\">\u4e03\u3001IPC_CREAT \u4e0e IPC_EXCL&#xff1a;\u5230\u5e95\u51e0\u4e2a\u610f\u601d<\/p>\n<p id=\"%E5%85%AB%E3%80%81key%20%E7%9A%84%E6%9C%AC%E8%B4%A8%EF%BC%9A%E7%94%A8%E6%88%B7%E7%A9%BA%E9%97%B4%22%E7%BA%A6%E5%AE%9A%22%E5%87%BA%E6%9D%A5%E7%9A%84%E5%90%8D%E5%AD%97-toc\" style=\"margin-left:40px\">\u516b\u3001key \u7684\u672c\u8d28&#xff1a;\u7528\u6237\u7a7a\u95f4&#034;\u7ea6\u5b9a&#034;\u51fa\u6765\u7684\u540d\u5b57<\/p>\n<p id=\"%E4%B9%9D%E3%80%81%E5%A4%9A%E6%96%87%E4%BB%B6%E7%89%88%E5%AE%8C%E6%95%B4%20demo-toc\" style=\"margin-left:40px\">\u4e5d\u3001\u591a\u6587\u4ef6\u7248\u5b8c\u6574 demo<\/p>\n<p id=\"comm.h-toc\" style=\"margin-left:80px\">comm.h<\/p>\n<p id=\"comm.c-toc\" style=\"margin-left:80px\">comm.c<\/p>\n<p id=\"server.c%20%E2%80%94%E2%80%94%20%E5%88%9B%E5%BB%BA%E8%80%85%EF%BC%8C%E5%BE%AA%E7%8E%AF%E8%AF%BB%E5%87%BA%20client%20%E5%86%99%E7%9A%84%E5%86%85%E5%AE%B9-toc\" style=\"margin-left:80px\">server.c \u2014\u2014 \u521b\u5efa\u8005&#xff0c;\u5faa\u73af\u8bfb\u51fa client \u5199\u7684\u5185\u5bb9<\/p>\n<p id=\"client.c%20%E2%80%94%E2%80%94%20%E5%8F%82%E4%B8%8E%E8%80%85%EF%BC%8C%E5%BE%80%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E9%87%8C%E5%86%99%2026%20%E4%B8%AA%E5%AD%97%E6%AF%8D-toc\" style=\"margin-left:80px\">client.c \u2014\u2014 \u53c2\u4e0e\u8005&#xff0c;\u5f80\u5171\u4eab\u5185\u5b58\u91cc\u5199 26 \u4e2a\u5b57\u6bcd<\/p>\n<p id=\"%E8%BF%90%E8%A1%8C%E4%B8%8E%E6%8E%92%E5%9D%91-toc\" style=\"margin-left:80px\">\u8fd0\u884c\u4e0e\u6392\u5751<\/p>\n<p id=\"%E5%8D%81%E3%80%81%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E7%9A%84%E5%90%8C%E6%AD%A5%E9%97%AE%E9%A2%98-toc\" style=\"margin-left:40px\">\u5341\u3001\u5171\u4eab\u5185\u5b58\u7684\u540c\u6b65\u95ee\u9898<\/p>\n<p id=\"%E5%8D%81%E4%B8%80%E3%80%81%E4%B8%8E%E5%89%8D%E9%9D%A2%E6%96%87%E7%AB%A0%E7%9A%84%E8%81%94%E7%B3%BB%20%2F%20%E9%9D%A2%E8%AF%95%E5%B8%B8%E8%80%83%E4%B8%B2%E8%81%94-toc\" style=\"margin-left:40px\">\u5341\u4e00\u3001\u4e0e\u524d\u9762\u6587\u7ae0\u7684\u8054\u7cfb \/ \u9762\u8bd5\u5e38\u8003\u4e32\u8054<\/p>\n<p id=\"11.1%20%E5%AF%B9%E6%AF%94%E3%80%8A%E9%80%9A%E4%BF%A1%EF%BC%88%E4%B8%80%EF%BC%89%EF%BC%9A%E4%BB%80%E4%B9%88%E6%98%AF%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1%EF%BC%9F%E3%80%8B-toc\" style=\"margin-left:80px\">11.1 \u5bf9\u6bd4\u300a\u901a\u4fe1&#xff08;\u4e00&#xff09;&#xff1a;\u4ec0\u4e48\u662f\u8fdb\u7a0b\u95f4\u901a\u4fe1&#xff1f;\u300b<\/p>\n<p id=\"11.2%20%E5%AF%B9%E6%AF%94%E3%80%8A%E9%80%9A%E4%BF%A1%EF%BC%88%E4%BA%8C%EF%BC%89%EF%BC%9A%E5%8C%BF%E5%90%8D%E7%AE%A1%E9%81%93%20vs%20%E5%91%BD%E5%90%8D%E7%AE%A1%E9%81%93%E3%80%8B-toc\" style=\"margin-left:80px\">11.2 \u5bf9\u6bd4\u300a\u901a\u4fe1&#xff08;\u4e8c&#xff09;&#xff1a;\u533f\u540d\u7ba1\u9053 vs \u547d\u540d\u7ba1\u9053\u300b<\/p>\n<p id=\"11.3%20%E5%AF%B9%E6%AF%94%E3%80%8A%E8%BF%9B%E7%A8%8B%EF%BC%88%E5%9B%9B%EF%BC%89%EF%BC%9A%E8%99%9A%E6%8B%9F%E5%9C%B0%E5%9D%80%E7%A9%BA%E9%97%B4%20%2F%20%E9%A1%B5%E8%A1%A8%20%2F%20%E8%BF%9B%E7%A8%8B%E9%9A%94%E7%A6%BB%E3%80%8B-toc\" style=\"margin-left:80px\">11.3 \u5bf9\u6bd4\u300a\u8fdb\u7a0b&#xff08;\u56db&#xff09;&#xff1a;\u865a\u62df\u5730\u5740\u7a7a\u95f4 \/ \u9875\u8868 \/ \u8fdb\u7a0b\u9694\u79bb\u300b<\/p>\n<p id=\"%E5%8D%81%E4%BA%8C%E3%80%81%E9%9D%A2%E8%AF%95%E5%AE%98%E8%BF%BD%E9%97%AE-toc\" style=\"margin-left:40px\">\u5341\u4e8c\u3001\u9762\u8bd5\u5b98\u8ffd\u95ee<\/p>\n<p id=\"%E5%8D%81%E4%B8%89%E3%80%81%E5%B0%8F%E7%BB%93%E4%B8%8E%E4%B8%8B%E7%AF%87%E9%A2%84%E5%91%8A-toc\" style=\"margin-left:40px\">\u5341\u4e09\u3001\u5c0f\u7ed3<\/p>\n<hr id=\"hr-toc\" \/>\n<\/p>\n<hr \/>\n<h3 id=\"%E4%B8%80%E3%80%81%E4%B8%80%E4%B8%AA%E9%97%AE%E9%A2%98%EF%BC%9A%E7%AE%A1%E9%81%93%E4%BC%A0%E5%A4%A7%E5%9D%97%E6%95%B0%E6%8D%AE%EF%BC%8C%E5%A4%9F%E5%BF%AB%E5%90%97%EF%BC%9F\">\u4e00\u3001\u4e00\u4e2a\u95ee\u9898&#xff1a;\u7ba1\u9053\u4f20\u5927\u5757\u6570\u636e&#xff0c;\u591f\u5feb\u5417&#xff1f;<\/h3>\n<p>\u5728 \u300aLinux\u7cfb\u7edf\u7bc724\u2014\u2014\u901a\u4fe1&#xff08;\u4e8c&#xff09;&#xff1a;\u533f\u540d\u7ba1\u9053 vs \u547d\u540d\u7ba1\u9053\u300b \u91cc\u6211\u4eec\u628a&#034;\u7ba1\u9053&#034;\u8bb2\u900f\u4e86&#xff1a;\u5185\u6838\u7f13\u51b2\u533a &#043; \u4e24\u4e2a fd&#xff0c;\u5148\u8fdb\u5148\u51fa\u3002\u4f46\u5b83\u6709\u4e2a\u7ed5\u4e0d\u5f00\u7684\u4ee3\u4ef7\u2014\u2014<\/p>\n<p>\u6bcf\u4e00\u6b21\u901a\u4fe1\u90fd\u8981&#034;\u7528\u6237\u6001 \u2192 \u5185\u6838\u6001 \u2192 \u7528\u6237\u6001&#034;\u62f7\u8d1d\u4e24\u6b21\u3002<\/p>\n<p>\u8fdb\u7a0b A \u628a\u6570\u636e\u4ece\u81ea\u5df1\u7684\u7528\u6237\u7a7a\u95f4 write \u8fdb\u5185\u6838\u7f13\u51b2\u533a&#xff0c;\u8fdb\u7a0b B \u518d\u4ece\u5185\u6838\u7f13\u51b2\u533a read \u5230\u81ea\u5df1\u7684\u7528\u6237\u7a7a\u95f4\u3002\u6570\u636e\u5728\u7528\u6237\u6001\u548c\u5185\u6838\u6001\u4e4b\u95f4\u515c\u4e86\u4e00\u5708\u3002\u4f20\u51e0 KB \u6ca1\u611f\u89c9&#xff0c;\u4f20\u51e0\u767e MB \u7684\u5927\u5757\u6570\u636e&#xff0c;\u8fd9\u4e2a\u62f7\u8d1d\u5f00\u9500\u5c31\u975e\u5e38\u660e\u663e\u3002<\/p>\n<p>\u4e8e\u662f\u6709\u4e86 IPC \u5bb6\u65cf\u91cc\u901f\u5ea6\u5929\u82b1\u677f\u2014\u2014\u5171\u4eab\u5185\u5b58&#xff08;Shared Memory&#xff09;\u3002\u5b83\u4e0d\u8d70\u5185\u6838\u4e2d\u8f6c&#xff0c;\u800c\u662f\u8ba9\u591a\u4e2a\u8fdb\u7a0b\u76f4\u63a5\u8bfb\u5199\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58\u3002\u4e0b\u9762\u628a\u5b83\u62c6\u5f00\u3002<\/p>\n<hr \/>\n<h3 id=\"%E4%BA%8C%E3%80%81%E4%B8%80%E5%8F%A5%E8%AF%9D%E7%BB%93%E8%AE%BA%EF%BC%9A%E4%BB%80%E4%B9%88%E6%98%AF%20System%20V%20%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98\">\u4e8c\u3001\u4e00\u53e5\u8bdd\u7ed3\u8bba&#xff1a;\u4ec0\u4e48\u662f System V \u5171\u4eab\u5185\u5b58<\/h3>\n<p>\u5171\u4eab\u5185\u5b58 &#061; \u540c\u4e00\u5757\u7269\u7406\u5185\u5b58&#xff0c;\u88ab\u6620\u5c04\u5230\u591a\u4e2a\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4&#xff1b;\u8fdb\u7a0b\u4e4b\u95f4\u4e0d\u518d\u7ecf\u8fc7\u5185\u6838\u62f7\u8d1d\u5373\u53ef\u4ea4\u6362\u6570\u636e\u3002\u4f46\u5b83\u7684\u4ee3\u4ef7\u662f&#034;\u4e0d\u5e26\u540c\u6b65\u4e92\u65a5&#034;&#xff0c;\u5fc5\u987b\u81ea\u5df1\u914d\u4fe1\u53f7\u91cf\/\u7ba1\u9053\u6765\u63a7\u5236\u8bbf\u95ee\u987a\u5e8f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"684\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260901174102-6a970e2e84b8c.png\" width=\"1151\" \/><\/p>\n<\/p>\n<h3 id=\"%E4%B8%89%E3%80%81System%20V%20%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9A%E6%A0%87%E5%87%86%E8%BF%98%E6%98%AF%20Linux%20%E4%B8%93%E5%B1%9E%EF%BC%9F\">\u4e09\u3001System V \u662f\u4ec0\u4e48&#xff1a;\u6807\u51c6\u8fd8\u662f Linux \u4e13\u5c5e&#xff1f;<\/h3>\n<p>System V \u662f\u4e00\u5957\u6807\u51c6&#xff0c;Linux \u5185\u6838\u652f\u6301\u5e76\u5b9e\u73b0\u4e86\u4e00\u5957 IPC \u901a\u4fe1\u6a21\u5757\u3002<\/p>\n<p>\u5c55\u5f00\u8bf4&#xff1a;<\/p>\n<ul>\n<li>System V&#xff08;System Five&#xff09;\u662f\u65e9\u671f\u7684 Unix \u6807\u51c6\u4e4b\u4e00&#xff0c;\u5b83\u5b9a\u4e49\u4e86\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u4e00\u7ec4\u63a5\u53e3\u89c4\u8303\u3002<\/li>\n<li>Linux \u5185\u6838\u5b9e\u73b0\u4e86\u8fd9\u5957\u89c4\u8303\u91cc\u7684\u4e09\u79cd IPC&#xff1a;\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf\u3002\u6240\u4ee5\u4f60\u4f1a\u770b\u5230\u5b83\u4eec\u90fd\u88ab\u547d\u540d\u4e3a msg* \/ shm* \/ sem*&#xff0c;API \u5f62\u6001\u9ad8\u5ea6\u4e00\u81f4&#xff08;\u90fd\u8981\u5148\u7528 key \u53bb&#034;\u627e\/\u5efa&#034;&#xff0c;\u518d\u7528\u4e00\u4e2a id \u53bb&#034;\u64cd\u4f5c&#034;&#xff09;\u3002<\/li>\n<li>\u5b83\u548c POSIX IPC&#xff08;\u540c\u6837\u662f\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf&#xff0c;\u4f46\u63a5\u53e3\u547d\u540d\u662f mq_* \/ shm_open \u90a3\u79cd&#xff09;\u662f\u5e76\u5217\u7684\u4e24\u5957\u4f53\u7cfb\u3002\u5927\u5382\u9762\u8bd5\u5e38\u95ee\u4e24\u8005\u533a\u522b&#xff0c;\u8fd9\u91cc\u5148\u8bb0\u4f4f&#xff1a;\u6211\u4eec\u8fd9\u7bc7\u8bb2\u7684\u662f System V \u8fd9\u5957\u3002<\/li>\n<\/ul>\n<h3 id=\"%E5%9B%9B%E3%80%81%E5%BA%95%E5%B1%82%E5%8E%9F%E7%90%86%EF%BC%9A%E4%B8%A4%E5%9D%97%E8%99%9A%E6%8B%9F%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%A6%82%E4%BD%95%E6%8C%87%E5%90%91%E5%90%8C%E4%B8%80%E5%9D%97%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98\">\u56db\u3001\u5e95\u5c42\u539f\u7406&#xff1a;\u4e24\u5757\u865a\u62df\u5730\u5740&#xff0c;\u5982\u4f55\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58<\/h3>\n<h4 id=\"4.1%20%E5%85%88%E5%9B%9E%E5%BF%86%EF%BC%9A%E8%BF%9B%E7%A8%8B%E4%B9%8B%E9%97%B4%E6%98%AF%22%E9%9A%94%E7%A6%BB%22%E7%9A%84\">4.1 \u5148\u56de\u5fc6&#xff1a;\u8fdb\u7a0b\u4e4b\u95f4\u662f&#034;\u9694\u79bb&#034;\u7684<\/h4>\n<p>\u5728 \u300aLinux\u7cfb\u7edf\u7bc7&#xff08;\u5341\u4e94&#xff09;\u2014\u2014\u8fdb\u7a0b&#xff08;\u56db&#xff09;&#xff1a;\u4e00\u6587\u5403\u900f Linux \u865a\u62df\u5730\u5740\u7a7a\u95f4\u300b \u91cc\u6211\u4eec\u5efa\u7acb\u4e86\u4e00\u4e2a\u5173\u952e\u8ba4\u77e5&#xff1a;<\/p>\n<ul>\n<li>\u6bcf\u4e2a\u8fdb\u7a0b\u6709\u72ec\u7acb\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4&#xff1b;<\/li>\n<li>CPU \u8bbf\u95ee\u53d8\u91cf\u65f6&#xff0c;\u9760 MMU &#043; \u9875\u8868 \u628a\u865a\u62df\u5730\u5740\u7ffb\u8bd1\u6210\u7269\u7406\u5730\u5740&#xff1b;<\/li>\n<li>\u9875\u8868\u91cc\u5b58\u7684\u662f&#034;\u865a\u62df\u9875\u53f7 \u2192 \u7269\u7406\u9875\u53f7&#034;\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u4e24\u4e2a\u8fdb\u7a0b\u7684 0x1234 \u867d\u7136\u865a\u62df\u5730\u5740\u76f8\u540c&#xff0c;\u4f46\u9875\u8868\u4e0d\u540c&#xff0c;\u6700\u7ec8\u843d\u5230\u4e24\u5757\u4e0d\u540c\u7684\u7269\u7406\u5185\u5b58\u3002\u8fd9\u6b63\u662f\u8fdb\u7a0b\u9694\u79bb\u7684\u57fa\u77f3&#xff0c;\u4e5f\u662f&#034;\u4e3a\u4ec0\u4e48\u5168\u5c40\u53d8\u91cf\u5728\u8fdb\u7a0b\u95f4\u662f\u5047\u5171\u4eab&#034;\u7684\u6839\u672c\u539f\u56e0\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"776\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260901174102-6a970e2ed6126.png\" width=\"1584\" \/><\/p>\n<h4 id=\"4.2%20%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E7%9A%84%22%E9%AD%94%E6%B3%95%22%EF%BC%9A%E8%AE%A9%E9%A1%B5%E8%A1%A8%E6%8C%87%E5%90%91%E5%90%8C%E4%B8%80%E5%9D%97%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98\">4.2 \u5171\u4eab\u5185\u5b58\u7684&#034;\u9b54\u6cd5&#034;&#xff1a;\u8ba9\u9875\u8868\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58<\/h4>\n<p>\u5171\u4eab\u5185\u5b58\u5e72\u7684\u4e8b&#xff0c;\u6070\u6070\u662f\u628a\u8fd9\u5957\u89c4\u5219\u53cd\u8fc7\u6765\u7528\u2014\u2014<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"704\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260901174103-6a970e2f66efa.png\" width=\"1709\" \/><\/p>\n<h4 id=\"4.3%20%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BF%AB%EF%BC%9F%22%E4%B8%8D%E7%BB%8F%E8%BF%87%E5%86%85%E6%A0%B8%22%E6%8C%87%E7%9A%84%E6%98%AF%E4%BB%80%E4%B9%88\"> 4.3 \u4e3a\u4ec0\u4e48\u5feb&#xff1f;&#034;\u4e0d\u7ecf\u8fc7\u5185\u6838&#034;\u6307\u7684\u662f\u4ec0\u4e48<\/h4>\n<p>\u7ba1\u9053\u6bcf\u6b21\u4f20\u9012\u6570\u636e\u90fd\u8981\u9677\u5165\u5185\u6838&#xff08;&#034;\u8fdb\u5165\u5185\u6838\u7684\u7cfb\u7edf\u8c03\u7528\u6765\u4f20\u9012\u5f7c\u6b64\u7684\u6570\u636e&#034;&#xff09;\u3002\u5171\u4eab\u5185\u5b58\u4e4b\u6240\u4ee5\u5feb&#xff0c;\u662f\u56e0\u4e3a\u6570\u636e\u4e00\u65e6\u6620\u5c04\u597d\u4e86&#xff0c;\u8fdb\u7a0b\u540e\u7eed\u8bfb\u5199\u5c31\u53ea\u662f\u8bfb\u5199\u81ea\u5df1\u7684\u865a\u62df\u5730\u5740&#xff0c;\u4e0d\u9700\u8981\u518d\u8c03\u7528 read\/write \u8ba9\u5185\u6838\u642c\u8fd0\u2014\u2014\u5185\u6838\u53ea\u5728&#034;\u5efa\u7acb\u6620\u5c04&#034;\u90a3\u4e00\u523b\u4ecb\u5165&#xff0c;\u4e4b\u540e\u5c31\u662f\u4e24\u4e2a\u8fdb\u7a0b\u5bf9\u4e00\u5757\u5185\u5b58\u7684\u76f4\u63a5\u8bbf\u95ee\u3002\u8fd9\u5c31\u662f\u8bfe\u4ef6\u8bf4\u7684&#034;\u6570\u636e\u4f20\u9012\u4e0d\u518d\u6d89\u53ca\u5230\u5185\u6838&#034;\u3002<\/p>\n<p>\u4f46\u540c\u65f6\u8981\u8bb0\u4f4f\u4e00\u53e5\u786c\u8bdd&#xff1a;<span style=\"color:#fe2c24\">&#034;\u5171\u4eab\u5185\u5b58\u6ca1\u6709\u8fdb\u884c\u540c\u6b65\u4e0e\u4e92\u65a5&#xff01;\u5171\u4eab\u5185\u5b58\u7f3a\u4e4f\u8bbf\u95ee\u63a7\u5236&#xff01;\u4f1a\u5e26\u6765\u5e76\u53d1\u95ee\u9898\u3002&#034; \u6240\u4ee5\u5b83\u5feb&#xff0c;\u4f46&#034;\u4e0d\u5b89\u5168&#034;&#xff0c;\u540e\u9762\u7b2c\u5341\u8282\u70b9\u4e00\u4e0b\u600e\u4e48\u8865\u3002<\/span><\/p>\n<\/p>\n<h3 id=\"%E4%BA%94%E3%80%81%E5%86%85%E6%A0%B8%E6%80%8E%E4%B9%88%E7%AE%A1%E7%90%86%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%EF%BC%9Ashmid_ds%20%E7%BB%93%E6%9E%84\">\u4e94\u3001\u5185\u6838\u600e\u4e48\u7ba1\u7406\u5171\u4eab\u5185\u5b58&#xff1a;shmid_ds \u7ed3\u6784<\/h3>\n<p>\u65e2\u7136&#034;\u591a\u4e2a\u8fdb\u7a0b\u53ef\u80fd\u4f7f\u7528\u4e0d\u540c\u7684\u5171\u4eab\u5185\u5b58&#034;&#xff0c;\u5185\u6838\u5fc5\u987b\u6709\u4e00\u5957\u7ed3\u6784\u4f53\u6765\u63cf\u8ff0\u548c\u7ec4\u7ec7\u6bcf\u4e00\u4e2a\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u3002<\/p>\n<p>struct shmid_ds {<br \/>\n    struct ipc_perm     shm_perm;       \/* \u64cd\u4f5c\u6743\u9650 *\/<br \/>\n    int                 shm_segsz;      \/* \u5171\u4eab\u5185\u5b58\u6bb5\u5927\u5c0f (bytes) *\/<br \/>\n    __kernel_time_t     shm_atime;      \/* \u6700\u540e attach \u65f6\u95f4 *\/<br \/>\n    __kernel_time_t     shm_dtime;      \/* \u6700\u540e detach \u65f6\u95f4 *\/<br \/>\n    __kernel_time_t     shm_ctime;      \/* \u6700\u540e\u6539\u52a8\u65f6\u95f4 *\/<br \/>\n    __kernel_ipc_pid_t  shm_cpid;       \/* \u521b\u5efa\u8005 pid *\/<br \/>\n    __kernel_ipc_pid_t  shm_lpid;       \/* \u6700\u540e\u64cd\u4f5c\u8005 pid *\/<br \/>\n    unsigned short      shm_nattch;     \/* \u5f53\u524d\u6302\u63a5\u6570 (attach \u7684\u8fdb\u7a0b\u6570) *\/<br \/>\n    unsigned short      shm_unused;     \/* \u517c\u5bb9\u6027\u5b57\u6bb5 *\/<br \/>\n    void               *shm_unused2;    \/* \u65e7\u7248 DIPC \u7528 *\/<br \/>\n    void               *shm_unused3;    \/* \u672a\u4f7f\u7528 *\/<br \/>\n};<\/p>\n<p>\u51e0\u4e2a\u9762\u8bd5\u5e38\u95ee\u7684\u6210\u5458&#xff1a;<\/p>\n<ul>\n<li>shm_perm&#xff1a;\u6743\u9650&#xff0c;\u548c\u6587\u4ef6\u6743\u9650\u7c7b\u4f3c&#xff0c;\u7531 shmget \u7684 shmflg \u91cc\u7684 0666 \u8fd9\u79cd\u4f4d\u51b3\u5b9a\u3002<\/li>\n<li>shm_segsz&#xff1a;\u8fd9\u6bb5\u5171\u4eab\u5185\u5b58\u591a\u5927\u3002<\/li>\n<li>shm_nattch&#xff1a;\u5f53\u524d\u6709\u51e0\u4e2a\u8fdb\u7a0b\u6302\u63a5\u5728\u4e0a\u9762\u3002<\/li>\n<\/ul>\n<h3 id=\"%E5%85%AD%E3%80%81%E4%BA%94%E4%B8%AA%E6%8E%A5%E5%8F%A3%E9%80%90%E4%B8%AA%E6%8B%86%EF%BC%9Aftok%20%2F%20shmget%20%2F%20shmat%20%2F%20shmdt%20%2F%20shmctl\">\u516d\u3001\u4e94\u4e2a\u63a5\u53e3\u9010\u4e2a\u62c6&#xff1a;ftok \/ shmget \/ shmat \/ shmdt \/ shmctl<\/h3>\n<h4 id=\"6.1%20ftok%20%E2%80%94%E2%80%94%20%E5%9C%A8%E7%94%A8%E6%88%B7%E5%B1%82%E6%9E%84%E9%80%A0%E4%B8%80%E4%B8%AA%20key\">6.1 ftok \u2014\u2014 \u5728\u7528\u6237\u5c42\u6784\u9020\u4e00\u4e2a key<\/h4>\n<p>#include &lt;sys\/ipc.h&gt;<br \/>\nkey_t ftok(const char *pathname, int proj_id);<\/p>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u628a&#034;\u4e00\u4e2a\u771f\u5b9e\u5b58\u5728\u7684\u8def\u5f84 &#043; \u4e00\u4e2a\u9879\u76ee ID&#034;\u6620\u5c04\u6210\u4e00\u4e2a key_t \u6574\u6570\u3002<\/li>\n<li>\u5173\u952e\u70b9&#xff08;\u56fe\u7247\u91cc\u5f3a\u8c03\u4e86&#xff09;&#xff1a;key \u662f\u7531\u7528\u6237\u7a7a\u95f4\u751f\u6210\u7684&#xff0c;\u518d\u4f20\u7ed9 OS&#xff1b;\u5b83\u4e0d\u662f\u5185\u6838\u76f4\u63a5\u5206\u914d\u7ed9\u4f60\u7684\u3002\u4e24\u4e2a\u8fdb\u7a0b\u53ea\u8981\u4f20\u76f8\u540c\u7684 pathname \u548c proj_id&#xff0c;\u5c31\u80fd\u7b97\u51fa\u540c\u4e00\u4e2a key&#xff0c;\u8fdb\u800c\u627e\u5230\u540c\u4e00\u5757\u5171\u4eab\u5185\u5b58\u3002<\/li>\n<li>\u5751&#xff1a;pathname \u5fc5\u987b\u771f\u5b9e\u5b58\u5728&#xff0c;\u5b83\u53ea\u662f\u88ab\u62ff\u6765&#034;\u53d6\u67d0\u4e9b\u4f4d&#034;\u53c2\u4e0e\u8fd0\u7b97&#xff0c;\u8def\u5f84\u6307\u5411\u7684\u6587\u4ef6\u5185\u5bb9\u548c\u5927\u5c0f\u90fd\u65e0\u6240\u8c13\u3002<\/li>\n<\/ul>\n<h4 id=\"6.2%20shmget%20%E2%80%94%E2%80%94%20%E5%88%9B%E5%BB%BA%E6%88%96%E8%8E%B7%E5%8F%96%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98\">6.2 shmget \u2014\u2014 \u521b\u5efa\u6216\u83b7\u53d6\u5171\u4eab\u5185\u5b58<\/h4>\n<p>#include &lt;sys\/shm.h&gt;<br \/>\nint shmget(key_t key, size_t size, int shmflg);<\/p>\n<table>\n<tr>\u53c2\u6570\u542b\u4e49&#xff08;\u6765\u81ea\u8bfe\u4ef6&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>key<\/td>\n<td>\u8fd9\u4e2a\u5171\u4eab\u5185\u5b58\u6bb5\u7684&#034;\u540d\u5b57&#034;&#xff0c;\u7531 ftok \u751f\u6210<\/td>\n<\/tr>\n<tr>\n<td>size<\/td>\n<td>\u5171\u4eab\u5185\u5b58\u5927\u5c0f&#xff08;\u5efa\u8bae\u662f\u9875\u5927\u5c0f 4096 \u7684\u6574\u6570\u500d&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>shmflg<\/td>\n<td>\u7531\u4e5d\u4e2a\u6743\u9650\u6807\u5fd7\u6784\u6210&#xff0c;\u7528\u6cd5\u548c\u521b\u5efa\u6587\u4ef6\u65f6\u7684 mode \u6a21\u5f0f\u6807\u5fd7\u4e00\u6837&#xff08;\u5982 0666&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de\u8be5\u5171\u4eab\u5185\u5b58\u6bb5\u7684\u6807\u8bc6\u7801&#xff08;\u975e\u8d1f\u6574\u6570&#xff0c;\u53eb shmid&#xff09;&#xff1b;\u5931\u8d25\u8fd4\u56de -1\u3002<\/p>\n<p>shmflg \u6700\u91cd\u8981\u7684\u4e24\u4e2a\u4f4d&#xff1a;<\/p>\n<ul>\n<li>IPC_CREAT&#xff1a;\u5171\u4eab\u5185\u5b58\u4e0d\u5b58\u5728 \u2192 \u521b\u5efa\u5e76\u8fd4\u56de&#xff1b;\u5df2\u5b58\u5728 \u2192 \u83b7\u53d6\u5e76\u8fd4\u56de\u3002<\/li>\n<li>IPC_CREAT | IPC_EXCL&#xff1a;\u5171\u4eab\u5185\u5b58\u4e0d\u5b58\u5728 \u2192 \u521b\u5efa\u5e76\u8fd4\u56de&#xff1b;\u5df2\u5b58\u5728 \u2192 \u51fa\u9519\u8fd4\u56de -1&#xff08;\u7528\u6765\u786e\u4fdd&#034;\u6211\u662f\u521b\u5efa\u8005&#034;&#xff09;\u3002<\/li>\n<\/ul>\n<h4 id=\"6.3%20shmat%20%E2%80%94%E2%80%94%20%E6%8C%82%E6%8E%A5%E5%88%B0%E8%BF%9B%E7%A8%8B%E5%9C%B0%E5%9D%80%E7%A9%BA%E9%97%B4\">6.3 shmat \u2014\u2014 \u6302\u63a5\u5230\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4<\/h4>\n<p>void *shmat(int shmid, const void *shmaddr, int shmflg);<\/p>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u628a\u6807\u8bc6\u4e3a shmid \u7684\u5171\u4eab\u5185\u5b58&#xff0c;\u6620\u5c04\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u3002<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>shmid&#xff1a;shmget \u8fd4\u56de\u7684\u6807\u8bc6\u7801&#xff1b;<\/li>\n<li>shmaddr&#xff1a;\u6307\u5b9a\u8fde\u63a5\u5730\u5740&#xff0c;\u901a\u5e38\u4f20 NULL \u8ba9\u5185\u6838\u81ea\u52a8\u9009\u4e00\u4e2a\u5730\u5740&#xff1b;<\/li>\n<li>shmflg&#xff1a;\u5e38\u7528 SHM_RND&#xff08;\u5730\u5740\u5411\u4e0b\u5bf9\u9f50&#xff09;\u3001SHM_RDONLY&#xff08;\u53ea\u8bfb&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de\u6307\u5411\u5171\u4eab\u5185\u5b58\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u6307\u9488&#xff1b;\u5931\u8d25\u8fd4\u56de (void*)-1\u3002<\/li>\n<\/ul>\n<h4 id=\"6.4%20shmdt%20%E2%80%94%E2%80%94%20%E4%B8%8E%E5%BD%93%E5%89%8D%E8%BF%9B%E7%A8%8B%22%E5%8E%BB%E5%85%B3%E8%81%94%22\">6.4 shmdt \u2014\u2014 \u4e0e\u5f53\u524d\u8fdb\u7a0b&#034;\u53bb\u5173\u8054&#034;<\/h4>\n<p>int shmdt(const void *shmaddr);<\/p>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u628a\u5171\u4eab\u5185\u5b58\u6bb5\u4e0e\u5f53\u524d\u8fdb\u7a0b\u8131\u79bb&#xff08;\u89e3\u9664\u6620\u5c04&#xff09;\u3002<\/li>\n<li>\u53c2\u6570&#xff1a;shmaddr \u5c31\u662f shmat \u8fd4\u56de\u7684\u6307\u9488\u3002<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f 0&#xff1b;\u5931\u8d25 -1\u3002<\/li>\n<li>\u26a0\ufe0f \u5173\u952e\u5751&#xff1a;&#034;\u5c06\u5171\u4eab\u5185\u5b58\u6bb5\u4e0e\u5f53\u524d\u8fdb\u7a0b\u8131\u79bb\u4e0d\u7b49\u4e8e\u5220\u9664\u5171\u4eab\u5185\u5b58\u6bb5\u3002&#034; \u5b83\u53ea\u662f\u8ba9\u5f53\u524d\u8fdb\u7a0b\u4e0d\u518d\u80fd\u8bbf\u95ee\u8fd9\u6bb5\u5730\u5740&#xff0c;\u7269\u7406\u5185\u5b58\u548c\u5185\u6838\u5bf9\u8c61\u8fd8\u5728\u3002<\/li>\n<\/ul>\n<h4 id=\"6.5%20shmctl%20%E2%80%94%E2%80%94%20%E6%8E%A7%E5%88%B6%20%2F%20%E5%88%A0%E9%99%A4%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98\">6.5 shmctl \u2014\u2014 \u63a7\u5236 \/ \u5220\u9664\u5171\u4eab\u5185\u5b58<\/h4>\n<p>int shmctl(int shmid, int cmd, struct shmid_ds *buf);<\/p>\n<ul>\n<li>\u4f5c\u7528&#xff1a;\u7528\u4e8e\u63a7\u5236\u5171\u4eab\u5185\u5b58&#xff08;\u67e5\u72b6\u6001\u3001\u8bbe\u6743\u9650\u3001\u5220\u9664&#xff09;\u3002<\/li>\n<li>cmd \u7684\u4e09\u4e2a\u4e3b\u8981\u53d6\u503c&#xff1a;\n<ul>\n<li>IPC_RMID&#xff1a;\u6807\u8bb0\u5220\u9664\u3002\u5373\u4fbf\u8fd8\u6709\u8fdb\u7a0b\u6302\u7740&#xff0c;\u4e5f\u7167\u6837\u5220&#xff08;\u5185\u6838\u4f1a\u7b49\u6700\u540e\u4e00\u4e2a\u8fdb\u7a0b detach \u540e\u771f\u6b63\u91ca\u653e&#xff09;\u3002<\/li>\n<li>IPC_STAT&#xff1a;\u628a\u5f53\u524d\u72b6\u6001\u62f7\u8fdb buf\u3002<\/li>\n<li>IPC_SET&#xff1a;\u7528 buf \u66f4\u65b0\u6743\u9650\u3002<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f4a1; \u751f\u547d\u5468\u671f\u63d0\u9192&#xff1a;System V \u7684 IPC \u8d44\u6e90\u751f\u547d\u5468\u671f\u968f\u5185\u6838\u2014\u2014\u8fdb\u7a0b\u9000\u51fa\u4e0d\u4f1a\u81ea\u52a8\u5220&#xff0c;\u9664\u975e\u91cd\u542f\u6216\u624b\u52a8 shmctl(IPC_RMID) \/ ipcrm -m &lt;shmid&gt;\u3002\u6240\u4ee5&#034;\u8c01\u6765\u5220&#034;\u5fc5\u987b\u662f\u8fdb\u7a0b\u8be5\u505a\u7684\u4e8b&#xff0c;\u522b\u6307\u671b\u7cfb\u7edf\u66ff\u4f60\u6536\u5c3e<\/li>\n<\/ul>\n<h3 id=\"%E4%B8%83%E3%80%81IPC_CREAT%20%E4%B8%8E%20IPC_EXCL%EF%BC%9A%E5%88%B0%E5%BA%95%E5%87%A0%E4%B8%AA%E6%84%8F%E6%80%9D\">\u4e03\u3001IPC_CREAT \u4e0e IPC_EXCL&#xff1a;\u5230\u5e95\u51e0\u4e2a\u610f\u601d<\/h3>\n<table>\n<tr>\u7ec4\u5408\u5171\u4eab\u5185\u5b58\u4e0d\u5b58\u5728\u65f6\u5171\u4eab\u5185\u5b58\u5df2\u5b58\u5728\u65f6\u5178\u578b\u4f7f\u7528\u8005<\/tr>\n<tbody>\n<tr>\n<td>IPC_CREAT<\/td>\n<td>\u521b\u5efa\u5e76\u8fd4\u56de<\/td>\n<td>\u83b7\u53d6\u5e76\u8fd4\u56de<\/td>\n<td>\u53c2\u4e0e\u8005&#xff08;client&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>IPC_CREAT<\/td>\n<td>IPC_EXCL&#096;<\/td>\n<td>\u521b\u5efa\u5e76\u8fd4\u56de<\/td>\n<td>\u5931\u8d25\u8fd4\u56de -1<\/td>\n<\/tr>\n<tr>\n<td>0&#xff08;\u53ea\u7528\u6743\u9650\u4f4d\u6216 0&#xff09;<\/td>\n<td>\u5931\u8d25\u8fd4\u56de -1<\/td>\n<td>\u83b7\u53d6\u5e76\u8fd4\u56de<\/td>\n<td>\u53c2\u4e0e\u8005\u53e6\u4e00\u79cd\u5199\u6cd5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e3a\u4ec0\u4e48\u53d1\u8d77\u8005\u8981\u7528 IPC_CREAT | IPC_EXCL&#xff1f; \u5b83\u7b49\u4ef7\u4e8e&#034;\u6211\u8981\u4e00\u4e2a\u5168\u65b0\u7684\u3001\u6ca1\u4eba\u7528\u8fc7\u7684\u5171\u4eab\u5185\u5b58&#034;&#xff0c;\u5982\u679c\u62ff\u5230\u7684\u662f\u522b\u4eba\u5df2\u7ecf\u5efa\u597d\u7684&#xff0c;\u8bf4\u660e key \u51b2\u7a81\u6216\u8d44\u6e90\u6b8b\u7559\u5728\u5185\u6838\u91cc\u2014\u2014\u76f4\u63a5\u62a5\u9519\u66f4\u7a33\u59a5&#xff0c;\u907f\u514d\u5077\u5077\u6302\u5230\u4e00\u4e2a\u4e0d\u5bf9\u7684\u5185\u5b58\u4e0a\u3002 \u53bb\u83b7\u53d6\u3002<\/p>\n<\/p>\n<h3 id=\"%E5%85%AB%E3%80%81key%20%E7%9A%84%E6%9C%AC%E8%B4%A8%EF%BC%9A%E7%94%A8%E6%88%B7%E7%A9%BA%E9%97%B4%22%E7%BA%A6%E5%AE%9A%22%E5%87%BA%E6%9D%A5%E7%9A%84%E5%90%8D%E5%AD%97\">\u516b\u3001key \u7684\u672c\u8d28&#xff1a;\u7528\u6237\u7a7a\u95f4&#034;\u7ea6\u5b9a&#034;\u51fa\u6765\u7684\u540d\u5b57<\/h3>\n<p><span style=\"color:#fe2c24\">key \u7531\u7528\u6237\u7a7a\u95f4\u751f\u6210&#xff0c;\u4f20\u7ed9 OS\u3002<\/span>\u5f88\u591a\u4eba\u7b2c\u4e00\u6b21\u7528\u5171\u4eab\u5185\u5b58\u4f1a\u61f5&#xff1a;\u4e24\u4e2a\u8fdb\u7a0b\u51ed\u4ec0\u4e48\u4fdd\u8bc1\u6302\u5230\u540c\u4e00\u5757\u5185\u5b58&#xff1f;<\/p>\n<p>\u7b54\u6848\u5c31\u5728 key&#xff1a;<\/p>\n<li>shmget(key, &#8230;) \u5728\u5185\u6838\u91cc\u662f\u7528 key \u4f5c\u4e3a\u67e5\u627e\u4e3b\u952e\u7684\u2014\u2014\u540c\u4e00\u4e2a key \u627e\u5230\u7684\u5c31\u662f\u540c\u4e00\u5757\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u3002<\/li>\n<li>\u800c key \u6765\u81ea ftok(pathname, proj_id)&#xff0c;\u5b83\u672c\u8d28\u662f&#034;\u8def\u5f84 &#043; \u9879\u76eeID&#034;\u7684\u54c8\u5e0c\u503c\u3002<\/li>\n<li>\u6240\u4ee5\u53cc\u65b9\u53ea\u8981\u7ea6\u5b9a\u597d\u540c\u4e00\u4e2a\u8def\u5f84\u3001\u540c\u4e00\u4e2a proj_id&#xff0c;\u5404\u81ea ftok \u51fa\u6765\u7684 key \u5c31\u76f8\u540c&#xff0c;\u81ea\u7136\u80fd\u627e\u5230\u540c\u4e00\u5757\u5185\u5b58\u3002<\/li>\n<p>\u8fd9\u8ddf\u547d\u540d\u7ba1\u9053&#034;\u8ba4\u540d\u5b57&#034;\u662f\u4e00\u4e2a\u601d\u60f3&#xff1a;\u9760\u4e00\u4e2a\u53cc\u65b9\u90fd\u8ba4\u53ef\u7684\u540d\u5b57\u6765\u63a5\u5934\u3002\u533a\u522b\u5728\u4e8e&#xff0c;\u547d\u540d\u7ba1\u9053\u7684\u540d\u5b57\u662f\u6587\u4ef6\u7cfb\u7edf\u91cc\u7684 FIFO \u6587\u4ef6&#xff0c;\u5171\u4eab\u5185\u5b58\u7684&#034;\u540d\u5b57&#034;\u662f\u5185\u5b58\u91cc\u7684\u4e00\u4e2a\u6574\u6570 key\u3002<\/p>\n<p>\u987a\u5e26\u533a\u5206\u4e24\u4e2a\u5bb9\u6613\u6df7\u7684 ID&#xff1a;<\/p>\n<ul>\n<li>key&#xff1a;\u8de8\u8fdb\u7a0b&#034;\u7ea6\u5b9a&#034;\u51fa\u6765\u7684\u540d\u5b57&#xff0c;\u7528\u6237\u6001\u51b3\u5b9a&#xff1b;<\/li>\n<li>shmid&#xff1a;\u5185\u6838\u8fd4\u56de\u7ed9\u4f60\u7684&#034;\u672c\u5730\u53e5\u67c4&#034;&#xff0c;\u53ea\u5728\u4f60\u8fd9\u4e2a\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u91cc\u7528&#xff0c;\u7528\u6765\u8c03\u7528 shmat\/shmdt\/shmctl\u3002<\/li>\n<\/ul>\n<p><span style=\"color:#fe2c24\">\u95ee\u9898&#xff1a;System\u2011V\u5171\u4eab\u5185\u5b58\u4e3a\u4ec0\u4e48key\u9700\u8981\u7528\u6237\u751f\u6210&#xff1f;<\/span><\/p>\n<p>shmid\u662f\u8fdb\u7a0b\u79c1\u6709\u53e5\u67c4&#xff0c;\u522b\u7684\u8fdb\u7a0b\u62ff\u4e0d\u5230\u3002key\u76f8\u5f53\u4e8e\u5168\u5c40\u6697\u53f7&#xff0c;\u7528\u6765\u8ba9\u591a\u4e2a\u72ec\u7acb\u8fdb\u7a0b\u627e\u5230\u540c\u4e00\u5757\u5171\u4eab\u5185\u5b58&#xff0c;\u5185\u6838\u65e0\u6cd5\u81ea\u52a8\u751f\u6210\u5e76\u901a\u77e5\u5176\u4ed6\u8fdb\u7a0b\u8be5\u6807\u8bc6&#xff0c;\u6240\u4ee5\u8981\u7528\u6237\u7ea6\u5b9a\u751f\u6210&#xff1b;\u5982\u679c\u4f20\u5165IPC_PRIVATE\u7531\u5185\u6838\u81ea\u52a8\u751f\u6210key&#xff0c;\u5219\u4ec5fork\u7684\u7236\u5b50\u8fdb\u7a0b\u53ef\u4ee5\u4f7f\u7528&#xff0c;\u4e0d\u9002\u5408\u65e0\u5173\u8fdb\u7a0b\u901a\u4fe1\u3002<\/p>\n<h3 id=\"%E4%B9%9D%E3%80%81%E5%A4%9A%E6%96%87%E4%BB%B6%E7%89%88%E5%AE%8C%E6%95%B4%20demo\">\u4e5d\u3001\u591a\u6587\u4ef6\u7248\u5b8c\u6574 demo<\/h3>\n<h4 id=\"comm.h\">comm.h<\/h4>\n<p>#ifndef _COMM_H_<br \/>\n#define _COMM_H_<\/p>\n<p>#include &lt;stdio.h&gt;<br \/>\n#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/shm.h&gt;<\/p>\n<p>#define PATHNAME &#034;.&#034;      \/\/ ftok \u7528\u5230\u7684\u771f\u5b9e\u8def\u5f84&#xff0c;\u53cc\u65b9\u5fc5\u987b\u4e00\u81f4<br \/>\n#define PROJ_ID  0x6666   \/\/ \u9879\u76ee ID&#xff0c;\u53cc\u65b9\u5fc5\u987b\u4e00\u81f4<\/p>\n<p>int createShm(int size);  \/\/ \u521b\u5efa\u8005&#xff1a;IPC_CREAT|IPC_EXCL<br \/>\nint destroyShm(int shmid);\/\/ \u5220\u9664<br \/>\nint getShm(int size);     \/\/ \u53c2\u4e0e\u8005&#xff1a;IPC_CREAT<\/p>\n<p>#endif<\/p>\n<h4 id=\"comm.c\">comm.c<\/h4>\n<p>#include &#034;comm.h&#034;<\/p>\n<p>static int commShm(int size, int flags)<br \/>\n{<br \/>\n    key_t key &#061; ftok(PATHNAME, PROJ_ID);   \/\/ \u2460 \u7528\u6237\u6001\u751f\u6210 key<br \/>\n    if (key &lt; 0) {<br \/>\n        perror(&#034;ftok&#034;);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    int shmid &#061; 0;<br \/>\n    if ((shmid &#061; shmget(key, size, flags)) &lt; 0) {  \/\/ \u2461 \u7528 key \u521b\u5efa\/\u83b7\u53d6<br \/>\n        perror(&#034;shmget&#034;);<br \/>\n        return -2;<br \/>\n    }<br \/>\n    return shmid;<br \/>\n}<\/p>\n<p>int destroyShm(int shmid)<br \/>\n{<br \/>\n    if (shmctl(shmid, IPC_RMID, NULL) &lt; 0) {       \/\/ \u2464 \u6807\u8bb0\u5220\u9664<br \/>\n        perror(&#034;shmctl&#034;);<br \/>\n        return -1;<br \/>\n    }<br \/>\n    return 0;<br \/>\n}<\/p>\n<p>int createShm(int size)<br \/>\n{<br \/>\n    return commShm(size, IPC_CREAT | IPC_EXCL | 0666);  \/\/ \u53d1\u8d77\u8005&#xff1a;\u5fc5\u987b\u5168\u65b0<br \/>\n}<\/p>\n<p>int getShm(int size)<br \/>\n{<br \/>\n    return commShm(size, IPC_CREAT);                    \/\/ \u53c2\u4e0e\u8005&#xff1a;\u83b7\u53d6\u5373\u53ef<br \/>\n}<\/p>\n<h4 id=\"server.c%20%E2%80%94%E2%80%94%20%E5%88%9B%E5%BB%BA%E8%80%85%EF%BC%8C%E5%BE%AA%E7%8E%AF%E8%AF%BB%E5%87%BA%20client%20%E5%86%99%E7%9A%84%E5%86%85%E5%AE%B9\">server.c \u2014\u2014 \u521b\u5efa\u8005&#xff0c;\u5faa\u73af\u8bfb\u51fa client \u5199\u7684\u5185\u5bb9<\/h4>\n<p>#include &#034;comm.h&#034;<\/p>\n<p>int main()<br \/>\n{<br \/>\n    int shmid &#061; createShm(4096);          \/\/ \u2460 \u521b\u5efa\u5168\u65b0\u5171\u4eab\u5185\u5b58<br \/>\n    char *addr &#061; shmat(shmid, NULL, 0);   \/\/ \u2462 \u6302\u63a5\u5230\u81ea\u5df1\u5730\u5740\u7a7a\u95f4<br \/>\n    sleep(2);<\/p>\n<p>    int i &#061; 0;<br \/>\n    while (i&#043;&#043; &lt; 26) {<br \/>\n        printf(&#034;client# %s\\\\n&#034;, addr);     \/\/ \u2463 \u76f4\u63a5\u8bfb&#xff0c;\u4e0d\u7ecf\u8fc7\u5185\u6838<br \/>\n        sleep(1);<br \/>\n    }<\/p>\n<p>    shmdt(addr);                           \/\/ \u2465 \u53bb\u5173\u8054&#xff08;\u4e0d\u662f\u5220\u9664&#xff09;<br \/>\n    sleep(2);<br \/>\n    destroyShm(shmid);                     \/\/ \u2466 \u771f\u6b63\u5220\u9664<br \/>\n    return 0;<br \/>\n}<\/p>\n<h4 id=\"client.c%20%E2%80%94%E2%80%94%20%E5%8F%82%E4%B8%8E%E8%80%85%EF%BC%8C%E5%BE%80%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E9%87%8C%E5%86%99%2026%20%E4%B8%AA%E5%AD%97%E6%AF%8D\">client.c \u2014\u2014 \u53c2\u4e0e\u8005&#xff0c;\u5f80\u5171\u4eab\u5185\u5b58\u91cc\u5199 26 \u4e2a\u5b57\u6bcd<\/h4>\n<p>#include &#034;comm.h&#034;<\/p>\n<p>int main()<br \/>\n{<br \/>\n    int shmid &#061; getShm(4096);             \/\/ \u2460 \u83b7\u53d6\u5df2\u5b58\u5728\u7684\u5171\u4eab\u5185\u5b58<br \/>\n    sleep(1);<br \/>\n    char *addr &#061; shmat(shmid, NULL, 0);   \/\/ \u2462 \u6302\u63a5<\/p>\n<p>    sleep(2);<br \/>\n    int i &#061; 0;<br \/>\n    while (i &lt; 26) {<br \/>\n        addr[i] &#061; &#039;A&#039; &#043; i;                \/\/ \u2463 \u76f4\u63a5\u5199&#xff0c;\u4e0d\u7ecf\u8fc7\u5185\u6838<br \/>\n        i&#043;&#043;;<br \/>\n        addr[i] &#061; 0;                      \/\/ \u672b\u5c3e\u7f6e 0&#xff0c;\u65b9\u4fbf printf<br \/>\n        sleep(1);<br \/>\n    }<\/p>\n<p>    shmdt(addr);                          \/\/ \u2465 \u53bb\u5173\u8054<br \/>\n    sleep(2);<br \/>\n    return 0;<br \/>\n}<\/p>\n<h4 id=\"%E8%BF%90%E8%A1%8C%E4%B8%8E%E6%8E%92%E5%9D%91\">\u8fd0\u884c\u4e0e\u6392\u5751<\/h4>\n<p>\u5148\u8dd1 .\/server&#xff0c;\u5b83\u4f1a IPC_CREAT|IPC_EXCL \u5efa\u4e00\u5757\u65b0\u7684&#xff1b;\u6b64\u65f6\u82e5\u4f60 Ctrl&#043;C \u6740\u6389 server&#xff0c;\u5171\u4eab\u5185\u5b58\u4e0d\u4f1a\u88ab\u5220\u9664&#xff08;\u751f\u547d\u5468\u671f\u968f\u5185\u6838&#xff09;&#xff0c;\u91cd\u8dd1\u5c31\u4f1a\u62a5\u9519&#xff1a;<\/p>\n<p># .\/server<br \/>\nshmget: File exists<br \/>\n# ipcs -m                      # \u67e5\u770b\u6b8b\u7559\u7684\u5171\u4eab\u5185\u5b58<br \/>\n&#8212;&#8212; Shared Memory Segments &#8212;&#8212;&#8211;<br \/>\nkey        shmid      owner   perms   bytes   nattch  status<br \/>\n0x66026a25 688145     root    666     4096    0<br \/>\n# ipcrm -m 688145             # \u624b\u52a8\u5220\u6389\u6b8b\u7559&#xff08;\u6f14\u793a\u7528&#xff0c;\u6b63\u5e38\u5e94\u7531\u8fdb\u7a0b\u5220&#xff09;<\/p>\n<p>\u5220 IPC \u8d44\u6e90\u662f&#034;\u8fdb\u7a0b\u8be5\u505a\u7684\u4e8b&#034;&#xff0c;\u8fd9\u91cc ipcrm \u53ea\u4e3a\u6f14\u793a\u547d\u4ee4&#xff0c;\u6b63\u5e38\u573a\u666f\u5343\u4e07\u522b\u4f9d\u8d56\u624b\u52a8\u6e05\u7406\u3002<\/p>\n<\/p>\n<h3 id=\"%E5%8D%81%E3%80%81%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%E7%9A%84%E5%90%8C%E6%AD%A5%E9%97%AE%E9%A2%98\">\u5341\u3001\u5171\u4eab\u5185\u5b58\u7684\u540c\u6b65\u95ee\u9898<\/h3>\n<p>\u5171\u4eab\u5185\u5b58\u6ca1\u6709\u8fdb\u884c\u540c\u6b65\u4e0e\u4e92\u65a5&#xff01;\u5171\u4eab\u5185\u5b58\u7f3a\u4e4f\u8bbf\u95ee\u63a7\u5236&#xff01;\u4f1a\u5e26\u6765\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff0c;server \u8bfb\u7684\u65f6\u5019&#xff0c;client \u53ef\u80fd\u8fd8\u6ca1\u5199\u5b8c\u2014\u2014\u8bfb\u5230\u7684\u5c31\u662f\u534a\u6210\u54c1\u3002\u600e\u4e48\u8865&#xff1f;\u4e24\u6761\u8def&#xff1a;<\/p>\n<li>\u914d\u4fe1\u53f7\u91cf&#xff08;Semaphore&#xff09;&#xff1a;\u6700\u6b63\u7edf\u7684&#034;\u5171\u4eab\u5185\u5b58 &#043; \u4fe1\u53f7\u91cf&#034;\u7ec4\u5408&#xff0c;\u4e0b\u4e00\u7bc7\u4f1a\u5c55\u5f00\u3002<\/li>\n<li>\u501f\u4e00\u6839\u7ba1\u9053\u505a&#034;\u901a\u77e5&#034;&#xff1a;\u8bfe\u4ef6\u5b9e\u4f8b2 \u7ed9\u4e86\u601d\u8def\u2014\u2014\u7528\u547d\u540d\u7ba1\u9053\u5145\u5f53&#034;\u8f6e\u6b21\u4fe1\u53f7&#034;&#xff0c;client \u5199\u5b8c\u53d1\u4e00\u4e2a\u5b57\u8282\u5524\u9192 server\u3002\u672c\u8d28\u662f\u7528\u7ba1\u9053\u7684\u963b\u585e\u7279\u6027&#xff0c;\u7ed9\u5171\u4eab\u5185\u5b58\u52a0\u4e00\u5c42\u7b80\u5355\u7684\u987a\u5e8f\u63a7\u5236&#xff08;\u8bfe\u4ef6\u4e5f\u79f0\u5b83&#034;\u4ec5\u4ec5\u662f\u8ba9\u540c\u5b66\u4eec\u7406\u89e3\u987a\u5e8f\u6027&#034;&#xff0c;\u6709 bug \u4ec5\u4f5c\u6f14\u793a&#xff09;\u3002<\/li>\n<p>\u8bb0\u4f4f\u4e3b\u7ebf\u7ed3\u8bba\u5c31\u591f\u4e86&#xff1a;\u5171\u4eab\u5185\u5b58\u7ba1&#034;\u6570\u636e&#034;&#xff0c;\u540c\u6b65\u7ba1&#034;\u79e9\u5e8f&#034;&#xff0c;\u4e24\u8005\u4e00\u5b9a\u8981\u642d\u914d\u4f7f\u7528\u3002 \u7ec6\u8282\u7559\u5230\u4e0b\u4e00\u7bc7\u4fe1\u53f7\u91cf\u3002<\/p>\n<\/p>\n<h3 id=\"%E5%8D%81%E4%B8%80%E3%80%81%E4%B8%8E%E5%89%8D%E9%9D%A2%E6%96%87%E7%AB%A0%E7%9A%84%E8%81%94%E7%B3%BB%20%2F%20%E9%9D%A2%E8%AF%95%E5%B8%B8%E8%80%83%E4%B8%B2%E8%81%94\">\u5341\u4e00\u3001\u4e0e\u524d\u9762\u6587\u7ae0\u7684\u8054\u7cfb \/ \u9762\u8bd5\u5e38\u8003\u4e32\u8054<\/h3>\n<h4 id=\"11.1%20%E5%AF%B9%E6%AF%94%E3%80%8A%E9%80%9A%E4%BF%A1%EF%BC%88%E4%B8%80%EF%BC%89%EF%BC%9A%E4%BB%80%E4%B9%88%E6%98%AF%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1%EF%BC%9F%E3%80%8B\">11.1 \u5bf9\u6bd4\u300a\u901a\u4fe1&#xff08;\u4e00&#xff09;&#xff1a;\u4ec0\u4e48\u662f\u8fdb\u7a0b\u95f4\u901a\u4fe1&#xff1f;\u300b<\/h4>\n<p>\u90a3\u7bc7\u628a IPC \u5168\u5bb6\u798f\u6446\u8fc7\u4e00\u904d&#xff0c;\u5176\u4e2d\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u5b9a\u4f4d\u662f&#xff1a;&#034;\u628a\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58\u6620\u5c04\u5230\u591a\u4e2a\u8fdb\u7a0b&#xff0c;\u5927\u5bb6\u76f4\u63a5\u8bfb\u5199&#xff0c;\u96f6\u62f7\u8d1d\u3001\u6027\u80fd\u6700\u9ad8\u3002\u4f46\u5b83\u4e0d\u8d1f\u8d23\u540c\u6b65&#xff0c;\u5fc5\u987b\u914d\u4fe1\u53f7\u91cf\u4f7f\u7528\u3002&#034; \u672c\u7bc7\u5c31\u662f\u628a\u90a3\u4e00\u53e5&#034;\u96f6\u62f7\u8d1d&#034;\u80cc\u540e\u7684\u9875\u8868\u6620\u5c04\u539f\u7406\u548cAPI \u5b9e\u6218\u8865\u9f50\u3002<\/p>\n<h4 id=\"11.2%20%E5%AF%B9%E6%AF%94%E3%80%8A%E9%80%9A%E4%BF%A1%EF%BC%88%E4%BA%8C%EF%BC%89%EF%BC%9A%E5%8C%BF%E5%90%8D%E7%AE%A1%E9%81%93%20vs%20%E5%91%BD%E5%90%8D%E7%AE%A1%E9%81%93%E3%80%8B\">11.2 \u5bf9\u6bd4\u300a\u901a\u4fe1&#xff08;\u4e8c&#xff09;&#xff1a;\u533f\u540d\u7ba1\u9053 vs \u547d\u540d\u7ba1\u9053\u300b<\/h4>\n<table>\n<tr>\u7ef4\u5ea6\u7ba1\u9053&#xff08;\u90a3\u7bc7\u8bb2\u7684&#xff09;\u5171\u4eab\u5185\u5b58&#xff08;\u672c\u7bc7&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>\u6570\u636e\u8def\u5f84<\/td>\n<td>\u7528\u6237 \u2192 \u5185\u6838\u7f13\u51b2 \u2192 \u7528\u6237&#xff08;\u4e24\u6b21\u62f7\u8d1d&#xff09;<\/td>\n<td>\u8fdb\u7a0b\u76f4\u63a5\u8bfb\u5199\u7269\u7406\u5185\u5b58&#xff08;\u96f6\u62f7\u8d1d&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u8fb9\u754c\/\u540c\u6b65<\/td>\n<td>\u81ea\u5e26 FIFO\u3001\u963b\u585e\u3001EOF<\/td>\n<td>\u65e0\u8fb9\u754c\u3001\u65e0\u540c\u6b65&#xff0c;\u8981\u81ea\u5df1\u914d<\/td>\n<\/tr>\n<tr>\n<td>\u751f\u547d\u5468\u671f<\/td>\n<td>\u533f\u540d\u968f\u8fdb\u7a0b\u3001\u547d\u540d\u968f\u6587\u4ef6<\/td>\n<td>\u968f\u5185\u6838&#xff0c;\u5fc5\u987b\u624b\u52a8\u5220<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color:#fe2c24\">\u4e00\u53e5\u8bdd&#xff1a;\u7ba1\u9053\u662f&#034;\u5185\u6838\u5e2e\u4f60\u642c&#034;&#xff0c;\u5171\u4eab\u5185\u5b58\u662f&#034;\u5927\u5bb6\u76f4\u63a5\u6539\u540c\u4e00\u5757&#034;&#xff0c;\u6240\u4ee5\u5171\u4eab\u5185\u5b58\u5feb&#xff0c;\u4f46\u9ebb\u70e6\u4e5f\u591a\u3002<\/span><\/p>\n<h4 id=\"11.3%20%E5%AF%B9%E6%AF%94%E3%80%8A%E8%BF%9B%E7%A8%8B%EF%BC%88%E5%9B%9B%EF%BC%89%EF%BC%9A%E8%99%9A%E6%8B%9F%E5%9C%B0%E5%9D%80%E7%A9%BA%E9%97%B4%20%2F%20%E9%A1%B5%E8%A1%A8%20%2F%20%E8%BF%9B%E7%A8%8B%E9%9A%94%E7%A6%BB%E3%80%8B\">11.3 \u5bf9\u6bd4\u300a\u8fdb\u7a0b&#xff08;\u56db&#xff09;&#xff1a;\u865a\u62df\u5730\u5740\u7a7a\u95f4 \/ \u9875\u8868 \/ \u8fdb\u7a0b\u9694\u79bb\u300b<\/h4>\n<p>\u90a3\u7bc7\u7684\u6838\u5fc3\u662f&#034;\u6bcf\u4e2a\u8fdb\u7a0b\u4e00\u5957\u9875\u8868&#xff0c;\u865a\u62df\u5730\u5740\u4e92\u4e0d\u5e72\u6270&#034;\u3002\u672c\u7bc7\u6070\u6070\u662f\u5b83\u7684\u53cd\u5411\u5e94\u7528&#xff1a;<\/p>\n<ul>\n<li>\u666e\u901a\u53d8\u91cf&#xff1a;\u7236\u5b50\u8fdb\u7a0b\u9760 COW&#xff08;\u5199\u65f6\u590d\u5236&#xff09;\u5404\u81ea\u4e00\u4efd\u7269\u7406\u9875&#xff1b;<\/li>\n<li>\u5171\u4eab\u5185\u5b58&#xff1a;\u5185\u6838\u7279\u610f\u8ba9\u4e24\u4e2a\u8fdb\u7a0b\u7684\u9875\u8868\u9879\u6307\u5411\u540c\u4e00\u7247\u7269\u7406\u9875&#xff0c;\u4e8e\u662f\u8bfb\u5199\u4e92\u76f8\u53ef\u89c1\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e2a\u7ed3\u8bba\u628a&#034;\u8fdb\u7a0b\u9694\u79bb&#034;\u548c&#034;\u8fdb\u7a0b\u5171\u4eab&#034;\u7edf\u4e00\u5728\u4e86\u540c\u4e00\u4e2a\u9875\u8868\u673a\u5236\u4e0b\u2014\u2014\u9762\u8bd5\u88ab\u95ee&#034;\u5171\u4eab\u5185\u5b58\u4e3a\u4ec0\u4e48\u80fd\u8ba9\u4e24\u4e2a\u8fdb\u7a0b\u770b\u5230\u540c\u4e00\u4efd\u6570\u636e&#034;&#xff0c;\u7b54&#034;\u9875\u8868\u6307\u5411\u540c\u4e00\u7269\u7406\u9875&#034;\u5c31\u70b9\u5230\u6839\u4e0a\u4e86\u3002<\/p>\n<\/p>\n<h3 id=\"%E5%8D%81%E4%BA%8C%E3%80%81%E9%9D%A2%E8%AF%95%E5%AE%98%E8%BF%BD%E9%97%AE\">\u5341\u4e8c\u3001\u9762\u8bd5\u5b98\u8ffd\u95ee<\/h3>\n<table>\n<tr>\u8ffd\u95ee\u7b54\u6848<\/tr>\n<tbody>\n<tr>\n<td>\u5171\u4eab\u5185\u5b58\u4e3a\u4ec0\u4e48\u6700\u5feb&#xff1f;<\/td>\n<td>\u6620\u5c04\u5efa\u7acb\u540e&#xff0c;\u8fdb\u7a0b\u8bfb\u5199\u53ea\u662f\u8bbf\u95ee\u81ea\u5df1\u7684\u865a\u62df\u5730\u5740&#xff0c;\u4e0d\u518d\u8c03\u7528 read\/write \u8ba9\u5185\u6838\u642c\u8fd0&#xff1b;\u6570\u636e\u4f20\u9012\u4e0d\u7ecf\u8fc7\u5185\u6838\u62f7\u8d1d\u3002<\/td>\n<\/tr>\n<tr>\n<td>shmdt \u548c shmctl(IPC_RMID) \u533a\u522b&#xff1f;<\/td>\n<td>shmdt \u53ea\u662f&#034;\u5f53\u524d\u8fdb\u7a0b&#034;\u89e3\u9664\u6620\u5c04&#xff0c;\u5185\u6838\u5bf9\u8c61\u8fd8\u5728&#xff1b;shmctl(IPC_RMID) \u624d\u662f\u6807\u8bb0\u5220\u9664&#xff08;\u7b49\u6240\u6709\u8fdb\u7a0b detach \u540e\u771f\u6b63\u91ca\u653e\u7269\u7406\u5185\u5b58&#xff09;\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u4e24\u4e2a\u8fdb\u7a0b\u600e\u4e48\u4fdd\u8bc1\u6302\u5230\u540c\u4e00\u5757&#xff1f;<\/td>\n<td>\u7528\u540c\u4e00\u4e2a key&#xff0c;\u800c key \u6765\u81ea ftok \u7684&#034;\u76f8\u540c pathname &#043; \u76f8\u540c proj_id&#034;\u3002\u5185\u6838\u6309 key \u67e5\u627e\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u3002<\/td>\n<\/tr>\n<tr>\n<td>IPC_EXCL \u4ec0\u4e48\u573a\u666f\u7528&#xff1f;<\/td>\n<td>\u4fdd\u8bc1\u672c\u8fdb\u7a0b\u65b0\u5efa IPC \u5bf9\u8c61&#xff0c;\u5bf9\u8c61\u5df2\u5b58\u5728\u5219\u62a5\u9519&#xff0c;\u907f\u514d\u91cd\u590d\u521b\u5efa<\/td>\n<\/tr>\n<tr>\n<td>\u751f\u547d\u5468\u671f\u968f\u5185\u6838\u662f\u4ec0\u4e48\u610f\u601d&#xff1f;<\/td>\n<td>\u8fdb\u7a0b\u9000\u51fa\u4e0d\u4f1a\u81ea\u52a8\u5220&#xff0c;\u9664\u975e\u91cd\u542f\u6216\u624b\u52a8 shmctl(IPC_RMID)\/ipcrm&#xff1b;\u4e0d\u5220\u4f1a\u5185\u6838\u8d44\u6e90\u6cc4\u6f0f\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u5171\u4eab\u5185\u5b58\u6ca1\u6709\u540c\u6b65\u600e\u4e48\u529e&#xff1f;<\/td>\n<td>\u642d\u914d\u4fe1\u53f7\u91cf\u505a\u4e92\u65a5\/\u79e9\u5e8f&#xff0c;\u6216\u7528\u7ba1\u9053\u505a\u8f7b\u91cf\u901a\u77e5&#xff1b;\u5b9e\u9645\u5de5\u7a0b\u4e2d\u4e24\u8005\u7ec4\u5408\u6700\u5e38\u89c1\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"%E5%8D%81%E4%B8%89%E3%80%81%E5%B0%8F%E7%BB%93%E4%B8%8E%E4%B8%8B%E7%AF%87%E9%A2%84%E5%91%8A\">\u5341\u4e09\u3001\u5c0f\u7ed3<\/h3>\n<p>\u7528\u4e09\u53e5\u8bdd\u6536\u5c3e&#xff1a;<\/p>\n<li>\u539f\u7406&#xff1a;\u5171\u4eab\u5185\u5b58\u8ba9\u591a\u4e2a\u8fdb\u7a0b\u7684\u9875\u8868\u6307\u5411\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58&#xff0c;\u8bfb\u5199\u96f6\u62f7\u8d1d\u3001\u6700\u5feb&#xff1b;<\/li>\n<li>\u63a5\u53e3&#xff1a;ftok \u5efa key \u2192 shmget \u5efa\/\u53d6 \u2192 shmat \u6302 \u2192 shmdt \u6458 \u2192 shmctl(IPC_RMID) \u5220&#xff1b;<\/li>\n<li>\u5751&#xff1a;shmdt \u2260 \u5220\u9664\u3001\u751f\u547d\u5468\u671f\u968f\u5185\u6838\u3001\u6ca1\u6709\u540c\u6b65\u4e92\u65a5\u3001\u5927\u5c0f\u6700\u597d\u6309\u9875\u5bf9\u9f50\u3002<\/li>\n<hr \/>\n<p>&#x1f4ac; \u770b\u5b8c\u5982\u679c\u6709\u4e00\u53e5\u6ca1\u61c2&#xff0c;\u6216\u8005\u4f60\u624b\u4e0a\u7684\u8bfe\u4ef6\u56fe\u8ddf\u6211\u8fd9\u91cc\u89e3\u8bfb\u5bf9\u4e0d\u4e0a&#xff0c;\u8bc4\u8bba\u533a\u76f4\u63a5\u8bf4&#xff0c;\u6211\u8865\u56fe\u8865\u4f8b\u5b50\u3002\u4e5f\u6b22\u8fce\u628a\u672c\u7bc7\u548c\u4f60\u6b63\u5728\u5b66\u7684\u300a\u901a\u4fe1&#xff08;\u4e00&#xff09;&#xff08;\u4e8c&#xff09;\u300b\u4e32\u8d77\u6765\u590d\u4e60\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e00\u7bc7\u8bb2\u900f Linux \u4e0b System V \u5171\u4eab\u5185\u5b58&#xff1a;\u5b83\u4e3a\u4ec0\u4e48\u662f\\&#8221;\u6700\u5feb\u7684 IPC\\&#8221;\u3001\u5e95\u5c42\u51ed\u4ec0\u4e48\u80fd\\&#8221;\u8ba9\u4e24\u4e2a\u8fdb\u7a0b\u770b\u5230\u540c\u4e00\u5757\u5185\u5b58\\&#8221;\u3001\u4ee5\u53ca ftok \/ shmget \/ shmat \/ shmdt \/ shmctl \u8fd9\u5957\u63a5\u53e3\u5230\u5e95\u600e\u4e48\u7528\u3001\u600e\u4e48\u5220\u3001\u600e\u4e48\u4fdd\u8bc1\u4e24\u4e2a\u8fdb\u7a0b\u6302\u5230\u540c\u4e00\u5757\u4e0a\u3002\u4ee3\u7801\u6cbf\u7528\u8bfe\u4ef6\u91cc\u7684 comm.h \/ comm.c \/ server.c \/ client.c \u591a\u6587\u4ef6\u7ed3\u6784&#xff0c;\u65b9\u4fbf\u4f60\u76f4\u63a5\u5bf9\u7167\u8bfe\u7a0b\u3002 \u76ee\u5f55<br \/>\n\u76ee\u5f55<br \/>\n\u200b\u7f16\u8f91<br \/>\n\u76ee\u5f55<br \/>\n\u4e00\u3001\u4e00\u4e2a\u95ee\u9898&amp;#xf<\/p>\n","protected":false},"author":2,"featured_media":99182,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,43],"topic":[],"class_list":["post-99186","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-linux","tag-43"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux\u7cfb\u7edf\u7bc725\u2014\u2014\u901a\u4fe1\uff08\u4e09\uff09\uff1aSystem V \u5171\u4eab\u5185\u5b58\uff1a\u4ece\u9875\u8868\u6620\u5c04\u5230 shmget\/shmat \u4e00\u6587\u641e\u61c2 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/99186.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux\u7cfb\u7edf\u7bc725\u2014\u2014\u901a\u4fe1\uff08\u4e09\uff09\uff1aSystem V \u5171\u4eab\u5185\u5b58\uff1a\u4ece\u9875\u8868\u6620\u5c04\u5230 shmget\/shmat \u4e00\u6587\u641e\u61c2 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u4e00\u7bc7\u8bb2\u900f Linux \u4e0b System V \u5171\u4eab\u5185\u5b58&#xff1a;\u5b83\u4e3a\u4ec0\u4e48\u662f&quot;\u6700\u5feb\u7684 IPC&quot;\u3001\u5e95\u5c42\u51ed\u4ec0\u4e48\u80fd&quot;\u8ba9\u4e24\u4e2a\u8fdb\u7a0b\u770b\u5230\u540c\u4e00\u5757\u5185\u5b58&quot;\u3001\u4ee5\u53ca ftok \/ shmget \/ shmat \/ shmdt \/ shmctl \u8fd9\u5957\u63a5\u53e3\u5230\u5e95\u600e\u4e48\u7528\u3001\u600e\u4e48\u5220\u3001\u600e\u4e48\u4fdd\u8bc1\u4e24\u4e2a\u8fdb\u7a0b\u6302\u5230\u540c\u4e00\u5757\u4e0a\u3002\u4ee3\u7801\u6cbf\u7528\u8bfe\u4ef6\u91cc\u7684 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