{"id":2124,"date":"2017-06-07T19:53:12","date_gmt":"2017-06-07T11:53:12","guid":{"rendered":"http:\/\/learn-house.idv.tw\/?p=2124"},"modified":"2017-06-07T20:16:51","modified_gmt":"2017-06-07T12:16:51","slug":"%e8%bd%89linux-ipc-shared-memory","status":"publish","type":"post","link":"https:\/\/learn-house.idv.tw\/?p=2124","title":{"rendered":"[\u8f49]linux ipc\u2014\u2014shared memory"},"content":{"rendered":"

\u4f86\u6e90\uff1ahttp:\/\/www.rosoo.net\/a\/201307\/16703.html<\/p>\n

1\u3001\u6982\u5ff5
\n\u5171\u7528\u8a18\u61b6\u9ad4\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u662f\u9032\u7a0b\u9593\u901a\u4fe1\u4e2d\u6700\u7c21\u55ae\u7684\u65b9\u5f0f\u4e4b\u4e00\u3002\u5171\u7528\u8a18\u61b6\u9ad4\u5141\u8a31\u5169\u500b\u6216\u66f4\u591a\u9032\u7a0b\u8a2a\u554f\u540c\u4e00\u584a\u8a18\u61b6\u9ad4\uff0c\u5c31\u5982\u540c malloc() \u51fd\u6578\u5411\u4e0d\u540c\u9032\u7a0b\u8fd4\u56de\u4e86\u6307\u5411\u540c\u4e00\u500b\u5be6\u9ad4\u8a18\u61b6\u9ad4\u5340\u57df\u7684\u6307\u6a19\u3002\u7576\u4e00\u500b\u9032\u7a0b\u6539\u8b8a\u4e86\u9019\u584a\u4f4d\u5740\u4e2d\u7684\u5167\u5bb9\u7684\u6642\u5019\uff0c\u5176\u5b83\u9032\u7a0b\u90fd\u6703\u5bdf\u89ba\u5230\u9019\u500b\u66f4\u6539\u3002<\/p>\n

2\u3001\u7528\u9014
\n. \u5171\u7528\u8a18\u61b6\u9ad4\u5141\u8a31\u5169\u500b\u6216\u591a\u500b\u9032\u7a0b\u5171\u7528\u4e00\u7d66\u5b9a\u7684\u5b58\u5132\u5340\uff0c\u56e0\u70ba\u8cc7\u6599\u4e0d\u9700\u8981\u4f86\u56de\u8907\u88fd\uff0c\u6240\u4ee5\u662f\u6700\u5feb\u7684\u4e00\u7a2e\u9032\u7a0b\u9593\u901a\u4fe1\u6a5f\u5236\u3002\u5171\u7528\u8a18\u61b6\u9ad4\u53ef\u4ee5\u901a\u904emmap()\u6620\u5c04\u666e\u901a\u6a94 \uff08\u7279\u6b8a\u60c5\u6cc1\u4e0b\u9084\u53ef\u4ee5\u63a1\u7528\u533f\u540d\u6620\u5c04\uff09\u6a5f\u5236\u5be6\u73fe\uff0c\u4e5f\u53ef\u4ee5\u901a\u904e\u7cfb\u7d71V\u5171\u7528\u8a18\u61b6\u9ad4\u6a5f\u5236\u5be6\u73fe\u3002\u61c9\u7528\u4ecb\u9762\u548c\u539f\u7406\u5f88\u7c21\u55ae\uff0c\u5167\u90e8\u6a5f\u5236\u8907\u96dc\u3002\u70ba\u4e86\u5be6\u73fe\u66f4\u5b89\u5168\u901a\u4fe1\uff0c\u5f80\u5f80\u9084\u8207\u4fe1\u865f \u71c8\u7b49\u540c\u6b65\u6a5f\u5236\u5171\u540c\u4f7f\u7528<\/p>\n

\u5171\u7528\u8a18\u61b6\u9ad4\u6d89\u53ca\u5230\u4e86\u5b58\u5132\u7ba1\u7406\u4ee5\u53ca\u6a94\u6848\u7cfb\u7d71\u7b49\u65b9\u9762\u7684\u77e5\u8b58\uff0c\u6df1\u5165\u7406\u89e3\u5176\u5167\u90e8\u6a5f\u5236\u6709\u4e00\u5b9a\u7684\u96e3\u5ea6\uff0c\u95dc\u9375\u9084\u8981\u7dca\u7dca\u6293\u4f4f\u5167\u6838\u4f7f\u7528\u7684\u91cd\u8981\u8cc7\u6599\u7d50\u69cb\u3002\u7cfb\u7d71V\u5171\u7528\u5167 \u5b58\u662f\u4ee5\u6a94\u7684\u5f62\u5f0f\u7d44\u7e54\u5728\u7279\u6b8a\u6a94\u6848\u7cfb\u7d71shm\u4e2d\u7684\u3002\u901a\u904eshmget\u53ef\u4ee5\u5275\u5efa\u6216\u7372\u5f97\u5171\u7528\u8a18\u61b6\u9ad4\u7684\u8b58\u5225\u78bc\u3002\u53d6\u5f97\u5171\u7528\u8a18\u61b6\u9ad4\u8b58\u5225\u78bc\u5f8c\uff0c\u8981\u901a\u904eshmat\u5c07\u9019\u500b\u8a18\u61b6\u9ad4\u5340 \u6620\u5c04\u5230\u672c\u9032\u7a0b\u7684\u865b\u64ec\u4f4d\u5740\u7a7a\u9593
\n <\/p>\n

3\u3001\u7279\u9ede
\n\u5171\u7528\u8a18\u61b6\u9ad4\u3002\u9867\u540d\u601d\u7fa9\uff0c\u9019\u7a2e\u901a\u4fe1\u65b9\u5f0f\u5141\u8a31\u591a\u500b\u9032\u7a0b\u5171\u7528\u540c\u4e00\u584a\u5be6\u9ad4\u8a18\u61b6\u9ad4\u7a7a\u9593\u4f86\u5be6\u73fe\u9032\u7a0b\u4e4b\u9593\u7684\u8cc7\u8a0a\u4ea4\u63db\uff0c\u5176\u7279\u9ede\u662f\u6c92\u6709\u4e2d\u9593\u74b0\u7bc0\uff0c\u76f4\u63a5\u5c07\u5171\u7528\u7684\u8a18\u61b6\u9ad4\u9801\u9762\u901a\u904e \u9644\u63a5\uff0c\u6620\u5c04\u5230\u76f8\u4e92\u901a\u4fe1\u7684\u9032\u7a0b\u5404\u81ea\u7684\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u4e2d\uff0c\u5f9e\u800c\u4f7f\u591a\u500b\u9032\u7a0b\u53ef\u4ee5\u76f4\u63a5\u5b58\u53d6\u540c\u4e00\u500b\u5be6\u9ad4\u8a18\u61b6\u9ad4\u9801\u9762\uff0c\u5982\u540c\u8a2a\u554f\u81ea\u5df1\u7684\u79c1\u6709\u7a7a\u9593\u4e00\u6a23\uff08\u4f46\u5be6\u8cea\u4e0a\u4e0d\u662f\u79c1\u6709\u7684\u800c\u662f \u5171\u7528\u7684\uff09\u3002\u56e0\u6b64\u9019\u7a2e\u9032\u7a0b\u9593\u901a\u4fe1\u65b9\u5f0f\u662f\u5728\u540c\u4e00\u500b\u96fb\u8166\u7cfb\u7d71\u4e2d\u7684\u8af8\u9032\u7a0b\u9593\u5be6\u73fe\u901a\u4fe1\u7684\u6700\u5feb\u6377\u7684\u65b9\u6cd5\uff0c\u800c\u5b83\u7684\u5c40\u9650\u6027\u4e5f\u5728\u65bc\u6b64\uff0c\u5373\u5171\u7528\u8a18\u61b6\u9ad4\u7684\u8af8\u9032\u7a0b\u5fc5\u9808\u5171\u8655\u540c\u4e00\u500b\u8a08 \u7b97\u6a5f\u7cfb\u7d71\uff0c\u6709\u5be6\u9ad4\u8a18\u61b6\u9ad4\u53ef\u4ee5\u5171\u7528\u624d\u884c\u3002<\/p>\n

4\u3001\u7528\u6cd5\uff1a
\n\u767c\u9001\u9032\u7a0b\uff1a
\n1\uff0e\u4f7f\u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmget()\u5275\u5efa\u6216\u8005\u7372\u53d6\u6307\u5b9akey\u503c\u7684\u5171\u7528\u8a18\u61b6\u9ad4\uff1b
\n2\uff0e\u4f7f\u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmat()\uff0c\u5c07\u8a72\u5171\u7528\u8a18\u61b6\u9ad4\u9644\u63a5\u5230\u81ea\u5df1\u7684\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\uff1b
\n3.\u5c07\u9700\u8981\u767c\u9001\u7684\u8cc7\u8a0a\u5beb\u5165\u5171\u7528\u8a18\u61b6\u9ad4\uff0c\u65b9\u6cd5\u6709\u4ee5\u4e0b\u5e7e\u7a2e\uff1a
\n\u2460\uff0e \u6bcf\u689d\u8cc7\u8a0a\u90fd\u4ee5\u8ffd\u52a0\u7684\u65b9\u5f0f\u5beb\u5165\uff0c\u53ef\u4ee5\u4f7f\u7528C\u8a9e\u8a00\u63d0\u4f9b\u7684\u5b57\u4e32\u8ffd\u52a0\u51fd\u6578strcat(viraddr\uff0c buffer)\uff0c\u8a72\u51fd\u6578\u7684\u529f\u80fd\u662f\u5c07buffer\u4e2d\u7684\u5b57\u4e32\u8ffd\u52a0\u5230\u7531viraddr\u9644\u63a5\u7684\u5171\u7528\u5b58\u5132\u5340\u7684\u5c3e\u90e8\u3002\u5176\u4e2d\uff0cviraddr\u662f\u8acb\u6c42\u5f97\u5230\u7684\u5171\u7528\u8a18\u61b6\u9ad4\u7684\u5730 \u5740\uff0cbuffer\u662f\u4f7f\u7528\u8005\u9032\u7a0b\u4e2d\u8acb\u6c42\u7684\u7528\u4f86\u5b58\u653e\u8cc7\u8a0a\u7684\u5b57\u5143\u7de9\u885d\u5340\u3002
\n\u2461\uff0e\u6bcf\u689d\u8cc7\u8a0a\u90fd\u4ee5\u8986\u84cb\u7684\u65b9\u5f0f\u5beb\u5165\uff0c\u53ef\u4ee5\u4f7f\u7528strcpy(viraddr\uff0cbuffer)\u51fd\u6578\u5c07buffer\u4e2d\u7684\u5b57\u4e32\u8907\u88fd\u5230viraddr\u6307\u5411\u7684\u5171\u7528\u8a18\u61b6\u9ad4\u4e2d\uff0c\u5247\u8a72\u5171\u7528\u8a18\u61b6\u9ad4\u4e2d\u5c31\u53ea\u6709\u7576\u524d\u8907\u88fd\u9032\u4f86\u7684\u8cc7\u8a0a\uff0c\u4ee5\u524d\u8907\u88fd\u7684\u8cc7\u8a0a\u88ab\u8986\u84cb\u4e86\u3002
\n\u2462\uff0e\u5171\u7528\u8a18\u61b6\u9ad4\u5b9a\u7fa9\u70ba\u6578\u503c\u578b\u8b8a\u6578\uff0c\u5247\u53ef\u4ee5\u5c07*viraddr\u4f5c\u70ba\u6578\u503c\u578b\u8b8a\u6578\u5c0d\u5176\u9032\u884c\u64cd\u4f5c\u3002\u4f8b\u5982\u5c07\u5176\u8ce6\u503c\u70ba0\u53ef\u4ee5\u4f7f\u7528\uff1a*viradd=0\u3002
\n\u2463\uff0e\u5171\u7528\u8a18\u61b6\u9ad4\u5b9a\u7fa9\u70ba\u6578\u503c\u578b\u9663\u5217\uff0c\u5247\u53ef\u4ee5\u5c07viraddr[i]\u4f5c\u70ba\u4e0b\u6a19\u8b8a\u6578\u4f7f\u7528\u3002\u4f8b\u5982\u5c07\u5176\u8ce6\u503c\u70ba0\u53ef\u4ee5\u4f7f\u7528\uff1a viradd[i]=0\u3002
\n4.\u4f7f\u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmdt()\uff0c\u65b7\u958b\u5171\u7528\u8a18\u61b6\u9ad4\u3002<\/p>\n

\u63a5\u6536\u9032\u7a0b\uff1a
\n1. \u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmget();\u5275\u5efa\u6216\u8005\u7372\u53d6\u6307\u5b9akey\u503c\u7684\u5171\u7528\u8a18\u61b6\u9ad4\uff1b
\n2. \u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmat();\u5c07\u8a72\u5171\u7528\u8a18\u61b6\u9ad4\u9644\u63a5\u5230\u81ea\u5df1\u7684\u7a0b\u5f0f\u7a7a\u9593\uff1b
\n3\uff0e\u5c07\u5171\u7528\u8a18\u61b6\u9ad4\u4e2d\u7684\u8cc7\u8a0a\u8f38\u51fa;\u6216\u53d6\u51fa\u5b58\u653e\u5230\u5176\u5b83\u8cc7\u6599\u584a\u4e2d\uff1b
\n4\uff0e\u4f7f\u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmdt();\u65b7\u958b\u5171\u7528\u8a18\u61b6\u9ad4\u3002
\n5\uff0e\u5982\u679c\u4e0d\u518d\u4f7f\u7528\u5171\u7528\u8a18\u61b6\u9ad4\u6642\uff0c\u4f7f\u7528\u7cfb\u7d71\u8abf\u7528\u51fd\u6578shmctl()\u5c07\u5176\u64a4\u92b7\uff0c\u683c\u5f0f\u70ba\uff1ashmctl(shmid,IPC_RMID,0);<\/p>\n

\u7372\u5f97\u4e00\u500b\u5171\u7528\u5b58\u5132\u8b58\u5225\u78bc
\n#include
\n#include
\nint shmget(key_t key, size_t size,intshmflg);<\/p>\n

\u529f\u80fd:\u5275\u5efa\u6216\u6253\u958b\u4e00\u584a\u5171\u7528\u8a18\u61b6\u9ad4\u5340
\n\u53c3\u6578\uff1a
\nkey\uff1aIPC\u9375\u503c
\nsize\uff1a\u8a72\u5171\u7528\u5b58\u5132\u6bb5\u7684\u9577\u5ea6(\u4f4d\u5143\u7d44)
\nshmflg\uff1a\u7528\u4f86\u6a19\u8b58\u51fd\u6578\u7684\u884c\u70ba<\/p>\n

\u53c3\u6578:
\nshmflg\uff1a\u7528\u4f86\u6a19\u8b58\u51fd\u6578\u7684\u884c\u70ba
\nIPC_CREAT\uff1a\u5982\u679c\u4e0d\u5b58\u5728\u5c31\u5275\u5efa
\nIPC_EXCL\uff1a\u5982\u679c\u5df2\u7d93\u5b58\u5728\u5247\u8fd4\u56de\u5931\u6557
\nIPC_NOWAIT\uff1a\u8abf\u7528\u9032\u7a0b\u6703\u7acb\u5373\u8fd4\u56de\u3002\u82e5\u767c\u751f\u932f\u8aa4\u5247\u8fd4\u56de-1\u3002
\nSHM_R\uff1a\u53ef\u8b80
\nSHM_W\uff1a\u53ef\u5beb
\n\u50b3\u56de\u503c:
\n\u6210\u529f\uff1a\u8fd4\u56de\u5171\u7528\u8a18\u61b6\u9ad4\u8b58\u5225\u78bc\u3002
\n\u5931\u6557\uff1a\u8fd4\u56de\uff0d1\u3002<\/p>\n

\u5171\u7528\u8a18\u61b6\u9ad4\u6620\u5c04(attach)
\n#include
\n#include
\nvoid *shmat(int shmid, const void *shmaddr, int shmflg);<\/p>\n

\u529f\u80fd\uff1a
\n\u5c07\u4e00\u500b\u5171\u7528\u8a18\u61b6\u9ad4\u6bb5\u6620\u5c04\u5230\u8abf\u7528\u9032\u7a0b\u7684\u8cc7\u6599\u6bb5\u4e2d\u3002
\n\u53c3\u6578\uff1a
\nshmid\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u8b58\u5225\u78bc\u3002
\nshmaddr\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u6620\u5c04\u4f4d\u5740(\u82e5\u70baNull\u5247\u7531\u7cfb \u7d71\u81ea\u52d5\u6307\u5b9a)\uff0c\u63a8\u85a6\u4f7f\u7528Null\u3002<\/p>\n

\u53c3\u6578\uff1a
\nshmflg\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u6bb5\u7684\u5b58\u53d6\u6b0a\u9650\u548c\u6620\u5c04\u689d\u4ef6
\n0\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u5177\u6709\u53ef\u8b80\u53ef\u5beb\u8a31\u53ef\u6b0a\u3002
\nSHM_RDONLY\uff1a\u552f\u8b80\u3002
\nSHM_RND\uff1a\uff08shmaddr\u975e\u7a7a\u6642\u624d\u6709\u6548\uff09
\n\u6c92\u6709\u6307\u5b9aSHM_RND\u5247\u6b64\u6bb5\u9023\u63a5\u5230shmaddr\u6240\u6307\u5b9a\u7684\u4f4d\u5740\u4e0a(shmaddr\u5fc5\u9700\u9801\u5c0d\u9f4a)\u3002
\n\u6307\u5b9a\u4e86SHM_RND\u5247\u6b64\u6bb5\u9023\u63a5\u5230shmaddr- shmaddr%SHMLAB \u6240\u8868\u793a\u7684\u4f4d\u5740\u4e0a\u3002
\n\u50b3\u56de\u503c\uff1a
\n\u6210\u529f\uff1a\u8fd4\u56de\u5171\u7528\u8a18\u61b6\u9ad4\u6bb5\u9996\u4f4d\u5740
\n\u5931\u6557\uff1a\u8fd4\u56de -1<\/p>\n

\u89e3\u9664\u5171\u7528\u8a18\u61b6\u9ad4\u6620\u5c04(detach)
\n#include
\n#include
\nint shmdt(const void *shmaddr);<\/p>\n

\u529f\u80fd\uff1a
\n\u5c07\u5171\u7528\u8a18\u61b6\u9ad4\u548c\u7576\u524d\u9032\u7a0b\u5206\u96e2(\u50c5\u50c5\u662f\u65b7\u958b\u806f\u7e6b\u4e26\u4e0d\u522a\u9664\u5171\u7528\u8a18\u61b6\u9ad4)\u3002
\n\u53c3\u6578\uff1a
\nshmaddr\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u6620\u5c04\u4f4d\u5740\u3002
\n\u50b3\u56de\u503c\uff1a
\n\u6210\u529f\u8fd4\u56de 0\uff0c\u5931\u6557\u8fd4\u56de -1\u3002
\n#include
\n#include
\nint shmctl(int shmid, int cmd, struct shmid_ds *buf);<\/p>\n

\u529f\u80fd\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u7a7a\u9593\u7684\u63a7\u5236\u3002
\n\u53c3\u6578\uff1a
\nshmid\uff1a\u5171\u7528\u8a18\u61b6\u9ad4\u8b58\u5225\u78bc\u3002
\ncmd\uff1a\u51fd\u6578\u529f\u80fd\u7684\u63a7\u5236\u3002
\nbuf\uff1ashmid_ds\u8cc7\u6599\u985e\u578b\u7684\u4f4d\u5740\uff0c\u7528\u4f86\u5b58\u653e\u6216\u66f4\u6539\u8a0a\u606f\u4f47\u5217\u7684\u5c6c\u6027\u3002<\/p>\n

\u53c3\u6578\uff1a
\ncmd\uff1a\u51fd\u6578\u529f\u80fd\u7684\u63a7\u5236
\nIPC_RMID\uff1a\u522a\u9664\u3002
\nIPC_SET\uff1a\u8a2d\u7f6eshmid_ds\u53c3\u6578\u3002
\nIPC_STAT\uff1a\u4fdd\u5b58shmid_ds\u53c3\u6578\u3002
\nSHM_LOCK\uff1a\u9396\u5b9a\u5171\u7528\u8a18\u61b6\u9ad4\u6bb5(\u8d85\u7d1a\u4f7f\u7528\u8005)\u3002
\nSHM_UNLOCK\uff1a\u89e3\u9396\u5171\u7528\u8a18\u61b6\u9ad4\u6bb5\u3002
\n\u50b3\u56de\u503c\uff1a
\n\u6210\u529f\u8fd4\u56de 0\uff0c\u5931\u6557\u8fd4\u56de -1\u3002<\/p>\n

5\u3001\u6848\u4f8b<\/p>\n

[c]\/\/\u8b80\uff1a
\n#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/types.h>
\n#include <sys\/ipc.h>
\n#include <sys\/shm.h><\/p>\n

#define BUFSZ 2048<\/p>\n

int main(int argc, char *argv[])
\n{
\n int shmid;
\n int ret;
\n key_t key;
\n char *shmadd;<\/p>\n

key = ftok(".", 2012);
\n if(key==-1)
\n {
\n perror("ftok");
\n }
\n system("ipcs -m");
\n \/*\u6253\u958b\u5171\u7528\u8a18\u61b6\u9ad4*\/
\n shmid = shmget(key, BUFSZ, SHM_R|SHM_W);
\n if(shmid < 0)
\n {
\n perror("shmget");
\n exit(-1);
\n }
\n \/*\u6620\u5c04*\/
\n shmadd = shmat(shmid, Null, 0);
\n if(shmadd < 0)
\n {
\n perror("shmat");
\n exit(-1);
\n }
\n \/*\u8b80\u5171\u7528\u8a18\u61b6\u9ad4\u5340\u8cc7\u6599*\/
\n printf("copy data from shared-memory\\n");
\n printf("data = [%s]\\n", shmadd);
\n \/*\u5206\u96e2\u5171\u7528\u8a18\u61b6\u9ad4\u548c\u7576\u524d\u9032\u7a0b*\/
\n ret = shmdt(shmadd);
\n if(ret < 0)
\n {
\n perror("shmdt");
\n exit(1);
\n }
\n else
\n {
\n printf("deleted shared-memory\\n");
\n }
\n \/*\u522a\u9664\u5171\u7528\u8a18\u61b6\u9ad4*\/
\n shmctl(shmid, IPC_RMID, Null);
\n system("ipcs -m");
\n return 0;
\n}[\/c]<\/p>\n

[c]\/\/\u5beb\uff1a
\n#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\n#include <unistd.h>
\n#include <sys\/types.h>
\n#include <sys\/ipc.h>
\n#include <sys\/shm.h><\/p>\n

#define BUFSZ 2048<\/p>\n

int main(int argc, char *argv[])
\n{
\n int shmid;
\n int ret;
\n key_t key;
\n char *shmadd;<\/p>\n

key = ftok(".", 2012);
\n if(key == -1)
\n {
\n perror("ftok");
\n }
\n \/*\u5275\u5efa\u5171\u7528\u8a18\u61b6\u9ad4*\/
\n shmid = shmget(key, BUFSZ, SHM_R|SHM_W|IPC_CREAT);
\n if(shmid < 0)
\n {
\n perror("shmget");
\n exit(-1);
\n }
\n \/*\u6620\u5c04*\/
\n shmadd = shmat(shmid, Null, 0);
\n if(shmadd < 0)
\n {
\n perror("shmat");
\n _exit(-1);
\n }
\n \/*\u62f7\u8c9d\u8cc7\u6599\u81f3\u5171\u7528\u8a18\u61b6\u9ad4\u5340*\/
\n printf("copy data to shared-memory\\n");
\n bzero(shmadd, BUFSZ);
\n strcpy(shmadd, "data in shared memory\\n");
\n return 0;
\n}[\/c]<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4f86\u6e90\uff1ahttp:\/\/www.rosoo.net\/a\/201307\/16703.html 1\u3001\u6982\u5ff5 \u5171\u7528\u8a18\u61b6\u9ad4\uff1a…<\/span><\/p>\n

Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2124","post","type-post","status-publish","format-standard","hentry","category-5"],"_links":{"self":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/2124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2124"}],"version-history":[{"count":0,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/2124\/revisions"}],"wp:attachment":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}