{"id":102287,"date":"2026-09-08T11:13:48","date_gmt":"2026-09-08T03:13:48","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/102287.html"},"modified":"2026-09-08T11:13:48","modified_gmt":"2026-09-08T03:13:48","slug":"%e3%80%90linux%e3%80%91%e5%88%9d%e8%af%86%e8%bf%9b%e7%a8%8b%ef%bc%9a%e8%bf%9b%e7%a8%8b%e7%9a%84%e6%a6%82%e5%bf%b5%e5%92%8c%e7%8a%b6%e6%80%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/102287.html","title":{"rendered":"\u3010Linux\u3011\u521d\u8bc6\u8fdb\u7a0b\uff1a\u8fdb\u7a0b\u7684\u6982\u5ff5\u548c\u72b6\u6001"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\n

\u5f15\u8a00<\/p>\n

1\u3001\u8fdb\u7a0b\u7684\u6982\u5ff5<\/p>\n

PCB\u6982\u5ff5<\/p>\n

task_struct\u91cc\u6709\u4ec0\u4e48<\/p>\n

\u8fdb\u7a0b\u7684\u672c\u8d28<\/p>\n

2\u3001\u4e86\u89e3\u8fdb\u7a0b<\/p>\n

\u00a0\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b<\/p>\n

\u5982\u4f55\u7528\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b<\/p>\n

\u4e3a\u4ec0\u4e48fork\u8981\u7ed9\u7236\u5b50\u8fd4\u56de\u5404\u81ea\u4e0d\u540c\u7684\u8fd4\u56de\u503c？<\/p>\n

\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u4e24\u6b21？<\/p>\n

\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u53d8\u91cf\u53ef\u4ee5\u65e2\u5927\u4e8e\u96f6\u53c8\u7b49\u4e8e\u96f6，\u5bfc\u81f4if\u548celse\u540c\u65f6\u6210\u7acb？<\/p>\n

3\u3001\u8fdb\u7a0b\u72b6\u6001<\/p>\n

\u8fd0\u884c\u72b6\u6001<\/p>\n

\u963b\u585e\u72b6\u6001<\/p>\n

\u6302\u8d77\u72b6\u6001<\/p>\n

Linux\u7684\u8fdb\u7a0b\u72b6\u6001<\/p>\n

\u00a01\u3001R<\/p>\n

2\u3001S\/D<\/p>\n

3\u3001T\/t<\/p>\n

4\u3001Z<\/p>\n

5\u3001X<\/p>\n

6\u3001\u7279\u6b8a\u72b6\u6001，\u5b64\u513f\u72b6\u6001<\/p>\n

Linux\u7cfb\u7edf\u7684\u5185\u6838\u94fe\u8868<\/p>\n

\u7ed3\u8bed<\/p>\n

\n

\u5f15\u8a00<\/h2>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u901a\u8fc7\u524d\u9762\u4e24\u7bc7\u6587\u7ae0\u7684\u5b66\u4e60，\u6211\u4eec\u5df2\u7ecf\u5927\u81f4\u4e86\u89e3\u4e86Linux\u7cfb\u7edf\u76f8\u5173\u7684\u57fa\u7840\u77e5\u8bc6，\u4ece\u8fd9\u7bc7\u6587\u7ae0\u5f00\u59cb，\u6211\u4eec\u5c06\u771f\u6b63\u8fdb\u5165\u64cd\u4f5c\u7cfb\u7edf\u5b66\u4e60\u7684\u6838\u5fc3\u90e8\u5206：\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u7684\u5b66\u4e60\u3002\u672c\u6587\u5c06\u8bb2\u89e3\u8fdb\u7a0b\u7ba1\u7406\u7cfb\u7edf\u7684\u57fa\u672c\u6982\u5ff5\u4ee5\u53ca\u5982\u4f55\u7406\u89e3\u8fdb\u7a0b\u72b6\u6001\u3002<\/p>\n

1\u3001\u8fdb\u7a0b\u7684\u6982\u5ff5<\/h2>\n

PCB\u6982\u5ff5<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5f53\u6211\u4eec\u5728\u547d\u4ee4\u884c\u754c\u9762\u6267\u884c\u53ef\u6267\u884c\u7a0b\u5e8f\u65f6，\u5bf9\u5e94\u7684\u6587\u4ef6\u4f1a\u4ece\u78c1\u76d8\u88ab\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d，\u64cd\u4f5c\u7cfb\u7edf\u5c31\u5fc5\u7136\u8981\u5bf9\u591a\u4e2a\u88ab\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u7684\u7a0b\u5e8f\u8fdb\u884c\u7ba1\u7406，\u64cd\u4f5c\u7cfb\u7edf\u5728\u5185\u6838\u4e2d\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\u7c7b\u578b，\u4e5f\u5c31\u662f\u4e00\u4e2a\u7ed3\u6784\u4f53，\u7528\u8fd9\u4e2a\u7ed3\u6784\u4f53\u5c06\u7a0b\u5e8f\u7684\u6240\u6709\u5c5e\u6027\u3001\u4ee3\u7801\u548c\u6570\u636e\u5168\u90e8\u5c01\u88c5\u8d77\u6765，\u9664\u6b64\u4e4b\u5916，\u8fd8\u4f1a\u5c01\u88c5\u4e24\u4e2a\u6307\u9488，\u4e00\u4e2a\u6307\u9488\u6307\u5411\u5185\u5b58\u4e2d\u7684\u7a0b\u5e8f\u672c\u8eab，\u4e00\u4e2a\u6307\u9488\u6307\u5411\u4e0b\u4e00\u4e2a\u7c7b\u4f3c\u7684\u8282\u70b9\u3002\u5185\u5b58\u4e2d\u6bcf\u6709\u4e00\u4e2a\u7a0b\u5e8f，\u64cd\u4f5c\u7cfb\u7edf\u5c31\u4f1a\u521b\u5efa\u8fd9\u6837\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u4e2a\u6570\u636e\u7c7b\u578b\u7684\u540d\u79f0\u53eb\u505aPCB（Process Control Block），\u4e2d\u6587\u540d\u4e3a\u8fdb\u7a0b\u63a7\u5236\u5757，\u5728Linux\u7cfb\u7edf\u4e2d，\u8fd9\u4e2aPCB\u7684\u5177\u4f53\u540d\u79f0\u662ftask_struct，\u8fdb\u7a0b\u7684\u6240\u6709\u5c5e\u6027，\u90fd\u53ef\u4ee5\u76f4\u63a5\u6216\u95f4\u63a5\u7684\u901a\u8fc7task_struct\u627e\u5230\u3002<\/p>\n

task_struct\u91cc\u6709\u4ec0\u4e48<\/h3>\n

1\u3001\u6807\u8bc6\u7b26：\u63cf\u8ff0\u8fdb\u7a0b\u7684\u552f\u4e00\u6807\u8bc6\u7b26，\u7528\u6765\u533a\u522b\u5176\u4ed6\u8fdb\u7a0b\u3002<\/p>\n

2\u3001\u72b6\u6001：\u4efb\u52a1\u72b6\u6001，\u9000\u51fa\u4ee3\u7801，\u9000\u51fa\u4fe1\u53f7\u7b49\u3002<\/p>\n

3\u3001\u4f18\u5148\u7ea7：\u76f8\u8f83\u4e8e\u5176\u4ed6\u8fdb\u7a0b\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n

4\u3001\u7a0b\u5e8f\u8ba1\u6570\u5668：\u7a0b\u5e8f\u4e2d\u5373\u5c06\u88ab\u6267\u884c\u7684\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u5730\u5740\u3002<\/p>\n

5\u3001\u5185\u5b58\u6307\u9488：\u5305\u542b\u7a0b\u5e8f\u4ee3\u7801\u548c\u8fdb\u7a0b\u76f8\u5173\u6570\u636e\u7684\u6307\u9488，\u8fd8\u6709\u548c\u5176\u4ed6\u8fdb\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u5757\u7684\u6307\u9488\u3002<\/p>\n

6\u3001\u4e0a\u4e0b\u6587\u6570\u636e：\u8fdb\u7a0b\u6267\u884c\u65f6\u5904\u7406\u5668\u7684\u5bc4\u5b58\u5668\u4e2d\u7684\u6570\u636e\u3002<\/p>\n

7\u3001I\/O\u72b6\u6001\u4fe1\u606f：\u5305\u62ec\u663e\u793a\u7684I\/O\u8bf7\u6c42，\u5206\u914d\u7ed9\u8fdb\u7a0b\u7684I\/O\u8bbe\u5907\u548c\u88ab\u8fdb\u7a0b\u4f7f\u7528\u7684\u6587\u4ef6\u5217\u8868\u3002<\/p>\n

\u8fdb\u7a0b\u7684\u672c\u8d28<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fdb\u7a0b\u7684\u672c\u8d28：\u8fdb\u7a0b = \u5185\u6838\u6570\u636e\u7ed3\u6784\u5bf9\u8c61 + \u81ea\u5df1\u7684\u4ee3\u7801\u548c\u6570\u636e\u3002\u5c06\u6bcf\u4e2a\u8282\u70b9\u901a\u8fc7\u6307\u9488\u94fe\u63a5\u8d77\u6765，\u8fd9\u4e2a\u7531\u8282\u70b9\u7ec4\u6210\u7684\u94fe\u8868\u5c31\u53eb\u8fdb\u7a0b\u5217\u8868，\u5bf9\u8fdb\u7a0b\u7684\u7ba1\u7406，\u5b9e\u9645\u4e0a\u5c31\u662f\u5bf9\u8fdb\u7a0b\u5217\u8868\u7684\u589e\u5220\u67e5\u6539\u3002<\/p>\n

2\u3001\u4e86\u89e3\u8fdb\u7a0b<\/h2>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6211\u4eec\u5386\u53f2\u4e0a\u6267\u884c\u7684\u6240\u6709\u6307\u4ee4\u3001\u5de5\u5177\u3001\u81ea\u5df1\u7684\u7a0b\u5e8f，\u8fd0\u884c\u8d77\u6765\u5168\u90fd\u662f\u8fdb\u7a0b\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728\u547d\u4ee4\u884c\u4e2d\u8f93\u5165\u547d\u4ee4\u6765\u67e5\u770b\u5f53\u524d\u7cfb\u7edf\u5185\u7684\u6240\u6709\u8fdb\u7a0b\u3002<\/p>\n

\/\/\u663e\u793a\u5f53\u524d\u7684\u6240\u6709\u8fdb\u7a0b
\nps ajx <\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6240\u6709\u8fdb\u7a0b\u90fd\u6709\u5c5e\u4e8e\u81ea\u5df1\u7684pid，\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5728\u7a0b\u5e8f\u4e2d\u4f7f\u7528getpid\u6765\u83b7\u53d6\u5f53\u524d\u7a0b\u5e8f\u7684pid，\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684C\u8bed\u8a00\u4ee3\u7801\u6765\u9a8c\u8bc1\u4e00\u4e0b\u3002<\/p>\n

#include<stdio.h>
\n#include<unistd.h> \/\/getpid\u88ab\u5305\u5728\u8fd9\u4e2a\u5934\u6587\u4ef6\u91cc
\n#include<sys\/types.h><\/p>\n

int main()
\n{
\n printf("\u6211\u662f\u4e00\u4e2a\u8fdb\u7a0b，\u6211\u7684pid\u662f：%d\\\\n", getpid());
\n return 0;
\n} <\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fdb\u7a0b\u4e5f\u53ef\u4ee5\u901a\u8fc7\u76ee\u5f55\u7684\u5f62\u5f0f\u8fdb\u884c\u67e5\u627e，\u6240\u6709\u8fdb\u7a0b\u90fd\u88ab\u5b58\u50a8\u5728\u6839\u76ee\u5f55\u4e2d\u540d\u4e3aproc\u7684\u76ee\u5f55\u91cc，\u6211\u4eec\u53ef\u4ee5\u6765\u6253\u5f00\u770b\u4e00\u4e0b\u4e00\u4e2a\u8fdb\u7a0b\u6587\u4ef6\u4e2d\u90fd\u6709\u4ec0\u4e48，\u6211\u518d\u6253\u5f00\u4e00\u4e2a\u547d\u4ee4\u884c\u7a97\u53e3，\u5c06\u521a\u521a\u90a3\u4e2a\u8fdb\u7a0b\u7684\u4ee3\u7801\u6539\u6210\u65e0\u9650\u5faa\u73af\u3002<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u4ee5\u770b\u5230，\u5f53\u6211\u4eec\u8fd0\u884c\u7a0b\u5e8f\u65f6，\u5728\u76ee\u5f55\u91cc\u4e5f\u80fd\u770b\u5230\u5bf9\u5e94\u7a0b\u5e8f\u7684pid，\u8fdb\u53bb\u540e\u53d1\u73b0\u6709\u8fd9\u4e48\u591a\u7684\u6587\u4ef6，\u4eca\u5929\u6211\u4eec\u53ea\u8bb2\u89e3\u5176\u4e2d\u7684\u4e24\u4e2a\u3002exe\u6587\u4ef6，\u91cc\u9762\u5b58\u50a8\u7684\u662f\u8fdb\u7a0b\u5bf9\u5e94\u7684\u53ef\u6267\u884c\u6587\u4ef6，cwd\u91cc\u5b58\u50a8\u7684\u662f\u53ef\u6267\u884c\u6587\u4ef6\u6240\u5728\u7684\u8def\u5f84\u3002<\/p>\n

\u00a0\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5728Linux\u7cfb\u7edf\u4e2d，\u6240\u6709\u7684\u8fdb\u7a0b\u90fd\u662f\u7531\u5b83\u7684\u7236\u8fdb\u7a0b\u521b\u5efa\u7684，\u6211\u4eec\u9664\u4e86\u53ef\u4ee5\u83b7\u53d6\u4e00\u4e2a\u6587\u4ef6\u7684pid\u4e4b\u5916，\u8fd8\u53ef\u4ee5\u901a\u8fc7getppid\u6765\u83b7\u53d6\u5b83\u7684\u7236\u8fdb\u7a0bpid\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5bf9\u4e0a\u9762\u4ee3\u7801\u7684\u7b80\u5355\u4fee\u6539\u6765\u9a8c\u8bc1\u4e00\u4e0b\u3002<\/p>\n

\u200b
\n#include<stdio.h>
\n#include<unistd.h> \/\/getpid\u88ab\u5305\u5728\u8fd9\u4e2a\u5934\u6587\u4ef6\u91cc
\n#include<sys\/types.h><\/p>\n

int main()
\n{
\n printf("\u6211\u662f\u4e00\u4e2a\u8fdb\u7a0b，\u6211\u7684pid\u662f：%d\\\\n，\u6211\u7684\u7236\u8fdb\u7a0b\u7684pid\u662f：%d\\\\n", getpid(), getppid());
\n return 0;
\n}<\/p>\n

\u200b <\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6211\u4eec\u770b\u5230\u6211\u4eec\u5f53\u524d\u8fd9\u4e2a\u7a0b\u5e8f\u7684ppid\u662f2551612，\u90a3\u8fd9\u4e2a2551612\u8fd9\u4e2aid\u662f\u8c01\u5462？\u6211\u4eec\u53ef\u4ee5\u5728\u8fdb\u7a0b\u8868\u91cc\u641c\u7d22\u4e00\u4e0b，\u901a\u8fc7\u6211\u4eec\u4e4b\u524d\u8bb2\u8fc7\u7684\u547d\u4ee4\u884c\u57fa\u672c\u6307\u4ee4：<\/p>\n

ps ajx | head -1 \/\/\u83b7\u53d6\u8868\u5934; ps ajx | grep 2551612 \/\/\u641c\u7d222551612\u8fdb\u7a0b <\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6211\u4eec\u53ef\u4ee5\u770b\u5230，\u539f\u6765\u6211\u4eec\u8fd9\u4e2a\u7a0b\u5e8f\u7684\u7236\u8fdb\u7a0b\u5c31\u662f\u6211\u4eec\u5f53\u524d\u6240\u5c5e\u7684\u7ec8\u7aef -bash\u3002\u90a3\u4e48\u6211\u4eec\u80fd\u4e0d\u80fd\u81ea\u5df1\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u5462？\u5f53\u7136\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n

\u5982\u4f55\u7528\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u60f3\u8981\u7528\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b，\u6211\u4eec\u5c31\u8981\u7528\u5230\u4e00\u4e2a\u7cfb\u7edf\u51fd\u6570 \u201cfork\u201d\u00a0，\u5b83\u7684\u4f5c\u7528\u5c31\u662f\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b，\u5b83\u6709\u4e24\u4e2a\u8fd4\u56de\u503c，\u5b83\u4f1a\u7ed9\u7236\u8fdb\u7a0b\u8fd4\u56de\u5b50\u8fdb\u7a0b\u7684pid，\u7ed9\u5b50\u8fdb\u7a0b\u8fd4\u56de\u4e00\u4e2a0，\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u4e48\u8fd4\u56de\u6211\u4eec\u540e\u9762\u518d\u6765\u8bf4，\u6211\u4eec\u5148\u5199\u4e00\u4e2a\u4ee3\u7801\u6765\u9a8c\u8bc1\u4e00\u4e0b<\/p>\n

#include<stdio.h>
\n#include<unistd.h> \/\/getpid\u88ab\u5305\u5728\u8fd9\u4e2a\u5934\u6587\u4ef6\u91cc
\n#include<sys\/types.h><\/p>\n

int main()
\n{
\n pid_t p = fork();
\n if (p != 0)
\n {
\n printf("\u6211\u662f\u4e00\u4e2a\u7236\u8fdb\u7a0b，\u6211\u7684pid\u662f；%d，\u6211\u7684\u5b50\u8fdb\u7a0bpid\u662f:%d\\\\n", getpid(), p);
\n sleep(1); \/\/\u8ba9\u5b50\u8fdb\u7a0b\u5148\u6253\u5370，\u9632\u6b62\u53d8\u6210\u5b64\u513f\u8fdb\u7a0b
\n }<\/p>\n

else
\n {
\n printf("\u6211\u662f\u4e00\u4e2a\u5b50\u8fdb\u7a0b，\u6211\u7684pid\u662f：%d，\u6211\u7684\u7236\u8fdb\u7a0b\u7684pid\u662f：%d\\\\n", getpid(), getppid());
\n }
\n return 0;
\n}<\/p>\n

\u200b<\/p>\n

\u200b <\/p>\n

\"\"<\/p>\n

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\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u73b0\u5728\u6211\u8fd8\u8981\u629b\u51fa\u4e09\u4e2a\u7591\u95ee：1\u3001\u4e3a\u4ec0\u4e48fork\u8981\u7ed9\u7236\u5b50\u8fd4\u56de\u5404\u81ea\u4e0d\u540c\u7684\u8fd4\u56de\u503c？2\u3001\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u4e24\u6b21？3\u3001\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u53d8\u91cf\u53ef\u4ee5\u65e2\u7b49\u4e8e\u96f6\u53c8\u5927\u4e8e\u96f6，\u5bfc\u81f4if\u548celse\u540c\u65f6\u6210\u7acb？\u63a5\u4e0b\u6765\u6211\u5c31\u6765\u4f9d\u6b21\u89e3\u7b54\u5b83\u4eec\u3002<\/p>\n

\u4e3a\u4ec0\u4e48fork\u8981\u7ed9\u7236\u5b50\u8fd4\u56de\u5404\u81ea\u4e0d\u540c\u7684\u8fd4\u56de\u503c？<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u56e0\u4e3a\u5728Linux\u7cfb\u7edf\u91cc，\u7236\u8fdb\u7a0b ：\u5b50\u8fdb\u7a0b\u7684\u6bd4\u4f8b\u662f1 ：n\u7684，\u6240\u4ee5\u4e00\u5b9a\u8981\u628a\u5b50\u8fdb\u7a0b\u7684pid\u8fd4\u56de\u7ed9\u7236\u8fdb\u7a0b，\u7236\u8fdb\u7a0b\u8981\u901a\u8fc7\u4e0d\u540c\u7684pid\u6765\u533a\u5206\u4e0d\u540c\u7684\u5b50\u8fdb\u7a0b，\u800c\u4e3a\u4e86\u4e0d\u8ba9\u8fd4\u56de\u503c\u4e00\u81f4，\u5e76\u4e14\u5b50\u8fdb\u7a0b\u81ea\u5df1\u5c31\u77e5\u9053\u81ea\u5df1\u7684pid，\u6240\u4ee5\u7ed9\u5b50\u8fdb\u7a0b\u8fd4\u56de\u65f6\u5c31\u8fd4\u56de\u4e00\u4e2a\u96f6\u3002<\/p>\n

\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u4e24\u6b21？<\/h4>\n

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3\u3001\u8fdb\u7a0b\u72b6\u6001<\/h2>\n

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\u8fd0\u884c\u72b6\u6001<\/h3>\n

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\u963b\u585e\u72b6\u6001<\/h3>\n

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\u6302\u8d77\u72b6\u6001<\/h3>\n

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Linux\u7684\u8fdb\u7a0b\u72b6\u6001<\/h3>\n

\u00a01\u3001R<\/h4>\n

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2\u3001S\/D<\/h4>\n

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3\u3001T\/t<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6682\u505c\u72b6\u6001\u3002T：\u5f53\u4e00\u4e2a\u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d，\u5728\u547d\u4ee4\u884c\u4e2d\u8f93\u5165ctrl + z\u53ef\u4ee5\u5c06\u7a0b\u5e8f\u5f3a\u5236\u6682\u505c，\u6b64\u65f6\u8fdb\u7a0b\u7684\u8fd0\u884c\u72b6\u6001\u5c31\u4e3aT\u3002t：\u5f53\u4e00\u4e2a\u7a0b\u5e8f\u5728debug\u72b6\u6001\u4e0b\u8c03\u8bd5\u65f6\u8fd0\u884c\u5230\u7a0b\u5e8f\u4e2d\u7684\u65ad\u70b9\u4f4d\u7f6e\u65f6\u5bfc\u81f4\u6682\u505c，\u6b64\u65f6\u8fd0\u884c\u72b6\u6001\u4e3at\u3002<\/p>\n

4\u3001Z<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u50f5\u5c38\u72b6\u6001\u3002\u8fdb\u7a0b\u5df2\u7ecf\u505c\u6b62，\u4f46\u662fPCB\u6570\u636e\u8fd8\u6ca1\u88ab\u91ca\u653e\u65f6\u7684\u72b6\u6001，\u8fd9\u79cd\u72b6\u6001\u5b58\u5728\u7684\u76ee\u7684\u662f，\u4e00\u4e2a\u8fdb\u7a0b\u5728\u9000\u51fa\u65f6，\u7236\u8fdb\u7a0b\u9700\u8981\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f，\u8981\u77e5\u9053\u5b50\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u9000\u51fa，\u5728\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u505c\u6b62\u4f46\u7236\u8fdb\u7a0b\u8fd8\u4e48\u83b7\u53d6\u9000\u51fa\u4fe1\u606f\u65f6\u7684\u72b6\u6001\u5c31\u53eb\u505a\u50f5\u5c38\u72b6\u6001\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5982\u679c\u7236\u8fdb\u7a0b\u4e00\u76f4\u4e0d\u7ba1，\u4e0d\u56de\u6536，\u4e0d\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f，\u90a3\u4e48Z\u72b6\u6001\u4f1a\u4e00\u76f4\u5b58\u5728，\u8fd9\u5c31\u662f\u6211\u4eec\u4e4b\u524d\u5728\u5b66\u4e60C\/C++\u4e2d\u7ecf\u5e38\u63d0\u5230\u7684\u5185\u5b58\u6cc4\u9732\u95ee\u9898\u3002<\/p>\n

5\u3001X<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6b7b\u4ea1\u72b6\u6001\u3002\u50f5\u5c38\u72b6\u6001\u540e\u7684\u72b6\u6001，\u9000\u51fa\u4fe1\u606f\u5df2\u7ecf\u88ab\u7236\u8fdb\u7a0b\u83b7\u53d6，\u8282\u70b9\u4fe1\u606f\u88ab\u5f7b\u5e95\u91ca\u653e\u540e\u7684\u72b6\u6001\u5c31\u662f\u6b7b\u4ea1\u72b6\u6001<\/p>\n

6\u3001\u7279\u6b8a\u72b6\u6001，\u5b64\u513f\u72b6\u6001<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e0a\u9762\u6211\u4eec\u8bf4\u8fc7，\u4e00\u4e2a\u8fdb\u7a0b\u5728\u9000\u51fa\u4e4b\u524d\u8981\u5148\u8fdb\u5165\u50f5\u5c38\u72b6\u6001，\u8ba9\u7236\u8fdb\u7a0b\u56de\u6536\u9000\u51fa\u4fe1\u606f，\u90a3\u5982\u679c\u7236\u8fdb\u7a0b\u6bd4\u5b50\u8fdb\u7a0b\u5148\u9000\u51fa\u4e86\u600e\u4e48\u529e\u5462？\u5728\u7236\u5b50\u8fdb\u7a0b\u5173\u7cfb\u4e2d，\u5982\u679c\u7236\u8fdb\u7a0b\u5148\u9000\u51fa，\u5b50\u8fdb\u7a0b\u4e0d\u80fd\u6ca1\u6709\u7236\u8fdb\u7a0b，\u5b50\u8fdb\u7a0b\u8981\u88ab1\u53f7\u8fdb\u7a0b\u9886\u517b，\u8fd9\u4e2a\u88ab\u9886\u517b\u7684\u8fdb\u7a0b\u5c31\u53eb\u505a\u5b64\u513f\u8fdb\u7a0b\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 1\u53f7\u8fdb\u7a0b\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u7684\u64cd\u4f5c\u7cfb\u7edf，\u5728\u88ab\u9886\u517b\u540e，\u8fd9\u4e2a\u8fdb\u7a0b\u5c31\u4f1a\u53d8\u6210\u540e\u53f0\u8fdb\u7a0b，\u5c31\u65e0\u6cd5\u518d\u901a\u8fc7ctrl + c\u9000\u51fa\u4e86\u53ea\u80fd\u7528kill\u6307\u4ee4\u76f4\u63a5\u5c06\u8fdb\u7a0b\u6740\u6389\u3002\u6211\u4eec\u53ef\u4ee5\u5199\u4e2a\u4ee3\u7801\u6765\u9a8c\u8bc1\u4e00\u4e0b\u3002<\/p>\n

kill -9 \/\/+\u8fdb\u7a0bpid
\n#include<stdio.h>
\n#include<unistd.h> \/\/getpid\u88ab\u5305\u5728\u8fd9\u4e2a\u5934\u6587\u4ef6\u91cc
\n#include<sys\/types.h><\/p>\n

int main()
\n{
\n pid_t p = fork();
\n if (p != 0)
\n {
\n printf("\u6211\u662f\u4e00\u4e2a\u7236\u8fdb\u7a0b，\u6211\u7684pid\u662f；%d，\u6211\u7684\u5b50\u8fdb\u7a0bpid\u662f:%d\\\\n", getpid(), p);
\n \/\/\u53bb\u6389sleep(1)
\n }<\/p>\n

else
\n {
\n printf("\u6211\u662f\u4e00\u4e2a\u5b50\u8fdb\u7a0b，\u6211\u7684pid\u662f：%d，\u6211\u7684\u7236\u8fdb\u7a0b\u7684pid\u662f：%d\\\\n", getpid(), getppid());
\n }
\n return 0;
\n}<\/p>\n

\u200b<\/p>\n

\u200b<\/p>\n

\u200b <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6211\u4eec\u5c06\u4e0a\u6587\u9a8c\u8bc1\u7236\u5b50\u8fdb\u7a0b\u7684\u4ee3\u7801\u590d\u7528\u4e00\u6837，\u628asleep(1)\u8fd9\u4e00\u53e5\u53bb\u6389，\u56e0\u4e3a\u7236\u8fdb\u7a0b\u5148\u521b\u5efa，\u6240\u4ee5\u4e5f\u5148\u7ed3\u675f，\u6b64\u65f6\u5b50\u8fdb\u7a0b\u5c31\u53d8\u6210\u4e86\u5b64\u513f\u8fdb\u7a0b\u3002<\/p>\n

\"\"<\/p>\n

Linux\u7cfb\u7edf\u7684\u5185\u6838\u94fe\u8868<\/h2>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6211\u518d\u8865\u5145\u4e00\u4e2a\u5c0f\u77e5\u8bc6\u70b9，\u76f8\u4fe1\u5f88\u591a\u4eba\u770b\u5230\u8fd9\u91cc，\u90fd\u4f1a\u6709\u4e00\u4e2a\u7591\u95ee：\u4e3a\u4ec0\u4e48\u603b\u611f\u89c9\u4e00\u4e2a\u8fdb\u7a0b\u7684\u8282\u70b9\u597d\u50cf\u603b\u662f\u540c\u65f6\u88ab\u51e0\u4e2a\u94fe\u8868\u6240\u4f7f\u7528？\u8fd9\u662f\u600e\u4e48\u505a\u5230\u7684？\u8fd9\u65f6\u5019\u6211\u4eec\u5c31\u8981\u6765\u4e86\u89e3\u4e00\u4e0bLinux\u7cfb\u7edf\u5185\u6838\u7684\u94fe\u8868\u7ed3\u6784\u4e86\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5728task_struct\u4e2d，\u6211\u4eec\u4e0a\u6587\u5df2\u7ecf\u8bb2\u5230\u6bcf\u4e2a\u8282\u70b9\u91cc\u90fd\u4f1a\u6709\u6307\u9488，\u6539\u53d8\u8fdb\u7a0b\u72b6\u6001\u5b9e\u9645\u4e0a\u90fd\u662f\u901a\u8fc7\u6539\u53d8\u6307\u9488\u7684\u8d70\u5411\u6765\u505a\u5230\u7684，\u4f46\u662ftask_struct\u4e2d\u7684\u6307\u9488\u548c\u6211\u4eec\u5e73\u5e38\u5b66\u8fc7\u7684\u6307\u9488\u7528\u6cd5\u4e0d\u4e00\u6837\u3002\u7cfb\u7edf\u73b0\u5728\u5185\u90e8\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3alist_head\u7684\u7279\u6b8a\u53d8\u91cf，\u91cc\u9762\u53ea\u6709\u4e24\u4e2a\u6210\u5458，\u4e24\u4e2alist_head\u6307\u9488，next\u548cprev，\u6bcf\u4e2atask_struct\u8282\u70b9\u5185\u90fd\u6709\u8be5\u7c7b\u578b\u7684\u53d8\u91cflinks，\u8282\u70b9\u4e0e\u8282\u70b9\u4e4b\u95f4\u53ea\u6709\u76f8\u5bf9\u5e94\u7684links\u4e4b\u95f4\u4e92\u76f8\u94fe\u63a5，\u800c\u4e0d\u662f\u6307\u5411\u6574\u4e2a\u8282\u70b9\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u6837\u4e00\u6765，\u4e00\u4e2atask_struct\u91cc\u5c31\u80fd\u6709\u591a\u4e2alist_head\u53d8\u91cf，\u4e0d\u540c\u7684\u961f\u5217\u53ef\u4ee5\u6307\u5411\u4e00\u4e2a\u8282\u70b9\u4e2d\u4e0d\u540c\u7684list_head\u53d8\u91cf，\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2atask_struct\u540c\u65f6\u5c5e\u4e8e\u591a\u79cd\u6570\u636e\u7ed3\u6784，\u65e2\u53ef\u4ee5\u6302\u5728\u8fd9\u4e2a\u94fe\u8868\u4e0a，\u53c8\u53ef\u4ee5\u6302\u5728\u53e6\u4e00\u4e2a\u94fe\u8868\u4e0a，\u672c\u8d28\u4e0a\u5c31\u662f\u901a\u8fc7\u94fe\u63a5\u4e0d\u540c\u7684list_head\u53d8\u91cf\u8fbe\u5230\u7684\u6548\u679c\u3002<\/p>\n

\u7ed3\u8bed<\/h2>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u8282\u8bfe\u5e26\u5927\u5bb6\u6df1\u5165\u4e86\u89e3\u4e86Linux\u7cfb\u7edf\u4e2d\u8fdb\u7a0b\u7684\u57fa\u672c\u6982\u5ff5\u3001\u7236\u5b50\u8fdb\u7a0b\u6982\u5ff5\u548c\u8fdb\u7a0b\u72b6\u6001，\u8fd8\u6709\u62d3\u5c55\u5185\u5bb9Linux\u7cfb\u7edf\u7684\u5185\u6838\u94fe\u8868，\u5e0c\u671b\u901a\u8fc7\u8fd9\u7bc7\u6587\u7ae0\u80fd\u8ba9\u5927\u5bb6\u5bf9Linux\u7cfb\u7edf\u8fdb\u7a0b\u7684\u4e86\u89e3\u66f4\u52a0\u6df1\u523b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u76ee\u5f55 \u5f15\u8a00
\n1\u3001\u8fdb\u7a0b\u7684\u6982\u5ff5
\nPCB\u6982\u5ff5
\ntask_struct\u91cc\u6709\u4ec0\u4e48
\n\u8fdb\u7a0b\u7684\u672c\u8d28
\n2\u3001\u4e86\u89e3\u8fdb\u7a0b \u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b
\n\u5982\u4f55\u7528\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b
\n\u4e3a\u4ec0\u4e48fork\u8981\u7ed9\u7236\u5b50\u8fd4\u56de\u5404\u81ea\u4e0d\u540c\u7684\u8fd4\u56de\u503c？
\n\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u4e24\u6b21？
\n\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u53d8\u91cf\u53ef\u4ee5\u65e2\u5927\u4e8e\u96f6\u53c8\u7b49\u4e8e\u96f6，\u5bfc\u81f4if\u548celse\u540c\u65f6\u6210\u7acb？
\n3\u3001\u8fdb\u7a0b\u72b6\u6001
\n\u8fd0\u884c\u72b6\u6001
\n\u963b\u585e\u72b6\u6001
\n\u6302\u8d77\u72b6\u6001
\nLinux\u7684\u8fdb\u7a0b\u72b6\u6001 1\u3001R
\n2\u3001S\/D
\n3\u3001T\/t
\n4\u3001Z
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