{"id":98005,"date":"2026-08-30T21:42:29","date_gmt":"2026-08-30T13:42:29","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/98005.html"},"modified":"2026-08-30T21:42:29","modified_gmt":"2026-08-30T13:42:29","slug":"%e3%80%90linux-%e7%af%87%e3%80%91%e6%95%b0%e5%ad%97%e4%b8%96%e7%95%8c%e7%9a%84%e6%b0%b4%e6%b5%81%e8%93%84%e6%b0%b4%e6%b1%a0-io-%e7%bc%93%e5%86%b2%e5%8c%ba%e6%9c%ba%e5%88%b6%e6%b7%b1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/98005.html","title":{"rendered":"\u3010Linux \u7bc7\u3011\u6570\u5b57\u4e16\u754c\u7684\u6c34\u6d41\u84c4\u6c34\u6c60 \u2014\u2014 IO \u7f13\u51b2\u533a\u673a\u5236\u6df1\u5ea6\u5b9e\u6218\u89e3\u6790"},"content":{"rendered":"

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    \n

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    #include<stdio.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <unistd.h><\/p>\n

    int main()
    \n{
    \n close(1);
    \n int fd = open("test.txt",O_WRONLY|O_CREAT|O_TRUNC, 0666);
    \n printf("\u4f60\u597d，\u6211\u662f\u6d4b\u8bd5\u7f13\u51b2\u533a\u7684\u4ee3\u7801");<\/p>\n

    return 0;
    \n} <\/p>\n

    \"\"<\/p>\n

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    #include<stdio.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <unistd.h><\/p>\n

    int main()
    \n{
    \n close(1);
    \n int fd = open("test.txt",O_WRONLY|O_CREAT|O_TRUNC, 0666);
    \n printf("\u4f60\u597d，\u6211\u662f\u6d4b\u8bd5\u7f13\u51b2\u533a\u7684\u4ee3\u7801");
    \n close(1);<\/p>\n

    return 0;
    \n} <\/p>\n

    \"\"<\/p>\n

    \u6211\u4eec\u7684stdout\u662f\u6211\u4eec\u7684\u4e00\u4e2aFILE\u7c7b\u578b\u7684，\u6211\u4eec\u8fd9\u91cc\u7684FILE\u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u6211\u4eec\u8fd9\u4e2aFILE\u5c01\u88c5\u4e86\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u6211\u4eec\u7684stdout\u5185\u90e8\u5c01\u88c5\u4e86\u6211\u4eec\u7684\u6587\u4ef6\u63cf\u8ff0\u7b261.\u6240\u4ee5\u8fd9\u91cc\u6211\u4eec\u5bf91\u8fdb\u884c\u5237\u65b0\u3002\u5c31\u80fd\u5c06\u6211\u4eec\u7684\u5185\u5bb9\u8fdb\u884c\u4e00\u6b21\u5237\u65b0\u3002\u6240\u4ee5\u6211\u4eec\u4e5f\u5c31\u80fd\u770b\u5230\u6211\u4eec\u5bf9\u5e94\u7684\u5185\u5bb9\u4e86\u3002\u6240\u4ee5\u6211\u4eec\u53d1\u73b0\u6211\u4eec\u7528\u6237\u5c42\u5b58\u5728\u6211\u4eec\u5bf9\u5e94\u7684\u7f13\u51b2\u533a\u3002<\/p>\n

    #include<stdio.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <unistd.h><\/p>\n

    int main()
    \n{
    \n close(1);
    \n int fd = open("test.txt",O_WRONLY|O_CREAT|O_TRUNC, 0666);
    \n printf("\u4f60\u597d，\u6211\u662f\u6d4b\u8bd5\u7f13\u51b2\u533a\u7684\u4ee3\u7801");
    \n fflush(stdout);
    \n close(1);<\/p>\n

    return 0;
    \n} <\/p>\n

    \"\"<\/p>\n

    \u90a3\u6211\u4eec\u770b\u4e00\u4e0b\u6211\u4eec\u7684\u5185\u6838\u7f13\u51b2\u533a\u5427<\/p>\n

    \u6211\u4eec\u53d1\u73b0\u6211\u4eec\u8c03\u7528\u5185\u6838\u662f\u6ca1\u6709\u95ee\u9898\u7684，\u90a3\u6211\u4eec\u63a5\u4e0b\u6765\u5173\u95ed\u6211\u4eec\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u6765\u770b\u770b\u3002<\/p>\n

    #include<stdio.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <unistd.h>
    \n#include <string.h>
    \nint main()
    \n{
    \n close(1);
    \n int fd = open("test.txt",O_WRONLY|O_CREAT|O_TRUNC, 0666);
    \n const char* add = "\u4f60\u597d，\u6211\u662f\u6d4b\u8bd5\u7f13\u51b2\u533a\u7684\u4ee3\u7801";
    \n write(fd,add,strlen(add));<\/p>\n

    return 0;
    \n} <\/p>\n

    \"\"<\/p>\n

    \u8fd9\u91cc\u6211\u4eec\u770b\u5230\u6211\u4eec\u5373\u4f7f\u5173\u95ed\u4e86\u6211\u4eec\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u6211\u4eec\u5bf9\u5e94\u7684\u6587\u4ef6\u5185\u5bb9\u8fd8\u662f\u5b58\u5728\u7684，\u4e0b\u9762\u6211\u4eec\u8f93\u51fa\u5bf9\u5e94\u7684\u7ed3\u8bba\u3002<\/p>\n

    #include<stdio.h>
    \n#include <sys\/types.h>
    \n#include <sys\/stat.h>
    \n#include <fcntl.h>
    \n#include <unistd.h>
    \n#include <string.h>
    \nint main()
    \n{
    \n close(1);
    \n int fd = open("test.txt",O_WRONLY|O_CREAT|O_TRUNC, 0666);
    \n const char* add = "\u4f60\u597d，\u6211\u662f\u6d4b\u8bd5\u7f13\u51b2\u533a\u7684\u4ee3\u7801";
    \n write(fd,add,strlen(add));
    \n close(1);
    \n return 0;
    \n} <\/p>\n

    \"\"<\/p>\n

    \u7ed3\u8bba：<\/p>\n

    1.\u6211\u4eec\u5b58\u5728\u7f13\u51b2\u533a，\u5e76\u4e14\u5b58\u5728\u4e24\u4e2a\u7f13\u51b2\u533a，\u4e00\u4e2a\u7528\u6237\u7ea7\u7f13\u51b2\u533a（\u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u8bf4C\u8bed\u8a00\u5e93\u7ed9\u6211\u4eec\u63d0\u4f9b\u7684\u7f13\u51b2\u533a）\u8fd8\u6709\u4e00\u4e2a\u662f\u5185\u6838\u7ea7\u7f13\u51b2\u533a\u3002 2.\u6211\u4eec\u7528\u6237\u7ea7\u7f13\u51b2\u533a\u5199\u5165\u540e\u4e0d\u4e3b\u52a8\u5237\u65b0，\u6211\u4eec\u5bf9\u5e94\u7684\u6570\u636e\u5c31\u4f1a\u4e22\u5931，\u53ea\u6709\u6211\u4eec\u5237\u65b0\u5230\u6211\u4eec\u5bf9\u5e94\u7684\u5185\u6838\u7ea7\u7f13\u51b2\u6570\u636e\u624d\u4f1a\u771f\u6b63\u7684\u88ab\u8fdb\u884c\u5199\u5165\u3002<\/p>\n

    3.\u6211\u4eecc\u8bed\u8a00\u662f\u5199\u6ee1\u65f6\u5237\u65b0，\u5982\u4f55\u5237\u65b0\u6211\u4eec\u5bf9\u5e94\u5199\u6162\u4f1a\u8c03\u7528\u7cfb\u7edf\u8c03\u7528write\u5c06\u6211\u4eec\u6570\u636e\u5199\u5165\u5230\u6211\u4eec\u7684\u5185\u6838\u7ea7\u7f13\u51b2\u533a\u4e2d\u3002\u6211\u4eecfflush\u4e5f\u662f\u7c7b\u4f3c\u7684\u6211\u4eec\u5e95\u5c42\u80af\u5b9a\u8c03\u7528\u4e86write\u5c06\u7528\u6237\u7ea7\u7f13\u51b2\u533a\u7684\u5185\u5bb9\u5199\u5230\u4e86\u6211\u4eec\u5bf9\u5e94\u7684\u5185\u6838\u7ea7\u7f13\u51b2\u533a\u4e2d\u3002<\/p>\n<\/p>\n

    \u6211\u4eec\u521a\u624d\u5c31\u4e00\u76f4\u518d\u8bf4\u6211\u4eecFILE\u662f\u4e00\u4e2a\u7ed3\u6784\u4f53，\u90a3\u4e48\u73b0\u5728\u6211\u4eec\u6765\u770b\u4e00\u4e0b<\/p>\n

    \u4e94\u3001FILE\u7b80\u4ecb：<\/span><\/h2>\n

    \u6211\u4eec\u7684FILE\u7684\u5185\u90e8\u7684\u65b9\u6cd5\u5b9e\u73b0\u5728：<\/p>\n

    ubuntu\u7684<\/p>\n

    \/usr\/include\/x86_64-linux-gnu\/bits\/types\/struct_FILE.h<\/p>\n

    \u6211\u4eec\u6253\u5f00\u8fd9\u4e2a\u6587\u4ef6<\/p>\n

    \"\"<\/p>\n

    \u6211\u4eec\u4e0b\u9762\u7684\u4e3b\u8981\u4ee3\u7801\u5757：<\/p>\n

    \u6211\u4eec\u770b\u4e0b\u9762\u4e5f\u80fd\u770b\u5230\u6211\u4eec\u5c01\u88c5\u4e86\u6211\u4eec\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

    struct _IO_FILE {<\/p>\n

    int _flags;\/* High-order word is _IO_MAGIC; rest is flags. *\/
    \n#define _IO_file_flags _flags<\/p>\n

    \/\/\u7f13\u51b2\u533a\u76f8\u5173
    \n \/* The following pointers correspond to the C++ streambuf protocol. *\/
    \n \/* Note: Tk uses the _IO_read_ptr and _IO_read_end fields directly. *\/
    \n char* _IO_read_ptr;\/* Current read pointer *\/
    \n char* _IO_read_end;\/* End of get area. *\/
    \n char* _IO_read_base;\/* Start of putback+get area. *\/
    \n char* _IO_write_base;\/* Start of put area. *\/
    \n char* _IO_write_ptr;\/* Current put pointer. *\/
    \n char* _IO_write_end;\/* End of put area. *\/
    \n char* _IO_buf_base;\/* Start of reserve area. *\/
    \n char* _IO_buf_end;\/* End of reserve area. *\/
    \n \/* The following fields are used to support backing up and undo. *\/
    \n char *_IO_save_base; \/* Pointer to start of non-current get area. *\/
    \n char *_IO_backup_base; \/* Pointer to first valid character of backup area *\/
    \n char *_IO_save_end; \/* Pointer to end of non-current get area. *\/<\/p>\n

    struct _IO_marker *_markers;<\/p>\n

    struct _IO_FILE *_chain;<\/p>\n

    int _fileno; \/\/\u5c01\u88c5\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26
    \n#if 0
    \n int _blksize;
    \n#else
    \n int _flags2;
    \n#endif
    \n _IO_off_t _old_offset; \/* This used to be _offset but it's too small. *\/<\/p>\n

    #define __HAVE_COLUMN \/* temporary *\/
    \n \/* 1+column number of pbase(); 0 is unknown. *\/
    \n unsigned short _cur_column;
    \n signed char _vtable_offset;
    \n char _shortbuf[1];<\/p>\n

    \/* char* _save_gptr; char* _save_egptr; *\/<\/p>\n

    _IO_lock_t *_lock;
    \n#ifdef _IO_USE_OLD_IO_FILE
    \n};<\/p>\n

    \u516d\u3001\u603b\u7ed3<\/span><\/h2>\n
      \n
    • \u4e00\u822c C \u5e93\u51fd\u6570\u5199\u5165\u6587\u4ef6\u65f6\u662f\u5168\u7f13\u51b2\u7684，\u800c\u5199\u5165\u663e\u793a\u5668\u662f\u884c\u7f13\u51b2\u3002<\/li>\n
    • printf fwrite \u5e93\u51fd\u6570\u4f1a\u81ea\u5e26\u7f13\u51b2\u533a（\u8fdb\u5ea6\u6761\u4f8b\u5b50\u5c31\u53ef\u4ee5\u8bf4\u660e），\u5f53\u53d1\u751f\u91cd\u5b9a\u5411\u5230\u666e\u901a\u6587\u4ef6\u65f6，\u6570\u636e\u7684\u7f13\u51b2\u65b9\u5f0f\u7531\u884c\u7f13\u51b2\u53d8\u6210\u4e86\u5168\u7f13\u51b2\u3002<\/li>\n
    • \u800c\u6211\u4eec\u653e\u5728\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e，\u5c31\u4e0d\u4f1a\u88ab\u7acb\u5373\u5237\u65b0，\u751a\u81f3 fork \u4e4b\u540e<\/li>\n
    • \u4f46\u662f\u8fdb\u7a0b\u9000\u51fa\u4e4b\u540e，\u4f1a\u7edf\u4e00\u5237\u65b0，\u5199\u5165\u6587\u4ef6\u5f53\u4e2d\u3002<\/li>\n
    • \u4f46\u662f fork \u7684\u65f6\u5019，\u7236\u5b50\u6570\u636e\u4f1a\u53d1\u751f\u5199\u65f6\u62f7\u8d1d，\u6240\u4ee5\u5f53\u4f60\u7236\u8fdb\u7a0b\u51c6\u5907\u5237\u65b0\u7684\u65f6\u5019，\u5b50\u8fdb\u7a0b\u4e5f\u5c31\u6709\u4e86\u540c\u6837\u7684\u4e00\u4efd\u6570\u636e，\u968f\u5373\u4ea7\u751f\u4e24\u4efd\u6570\u636e\u3002<\/li>\n
    • write \u6ca1\u6709\u53d8\u5316，\u8bf4\u660e\u6ca1\u6709\u6240\u8c13\u7684\u7f13\u51b2\u3002<\/li>\n<\/ul>\n

      \u7efc\u4e0a：printf fwrite \u5e93\u51fd\u6570\u4f1a\u81ea\u5e26\u7f13\u51b2\u533a，\u800c write \u7cfb\u7edf\u8c03\u7528\u6ca1\u6709\u5e26\u7f13\u51b2\u533a\u3002\u53e6\u5916，\u6211\u4eec\u8fd9\u91cc\u6240\u8bf4\u7684\u7f13\u51b2\u533a，\u90fd\u662f\u7528\u6237\u7ea7\u7f13\u51b2\u533a\u3002\u5176\u5b9e\u4e3a\u4e86\u63d0\u5347\u6574\u673a\u6027\u80fd，OS \u4e5f\u4f1a\u63d0\u4f9b\u76f8\u5173\u5185\u6838\u7ea7\u7f13\u51b2\u533a，\u4e0d\u8fc7\u4e0d\u518d\u6211\u4eec\u8ba8\u8bba\u8303\u56f4\u4e4b\u5185\u3002<\/p>\n

      \u90a3\u8fd9\u4e2a\u7f13\u51b2\u533a\u8c01\u63d0\u4f9b\u5462？printf fwrite \u662f\u5e93\u51fd\u6570，write \u662f\u7cfb\u7edf\u8c03\u7528，\u5e93\u51fd\u6570\u5728\u7cfb\u7edf\u8c03\u7528\u7684 \u201c\u4e0a\u5c42\u201d，\u662f\u5bf9\u7cfb\u7edf\u8c03\u7528\u7684 \u201c\u5c01\u88c5\u201d，\u4f46\u662f write \u6ca1\u6709\u7f13\u51b2\u533a，\u800c printf fwrite \u6709，\u8db3\u4ee5\u8bf4\u660e，\u8be5\u7f13\u51b2\u533a\u662f\u4e8c\u6b21\u52a0\u4e0a\u7684，\u53c8\u56e0\u4e3a\u662f C，\u6240\u4ee5\u7531 C \u6807\u51c6\u5e93\u63d0\u4f9b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u4e8e\u6b64\u6b62？：\u4e2a\u4eba\u4e3b\u9875
      \n\u672c\u6587\u9009\u81ea\u4e13\u680f：\u00a0\u300aLinux\u7bc7\u300b
      \n\u2744\ufe0f\u4e2a\u4eba\u4e13\u680f\u4f20\u9001\u95e8：\u00a0\u300aQT\u767e\u65e5\u7b51\u57fa\u7bc7\u300b \u300a\u7b97\u6cd5\u7bc7\u300b\u00a0
      \n\u300aC\u4e0eSTL\u5256\u6790\u7bc7\u300b \u300a\u6570\u636e\u7ed3\u6784\u7bc7\u300b \u300aPython\u57fa\u7840\u7bc7\u300b\u300a\u5d4c\u5165\u5f0f\u783a\u5251\u5f55\u300b
      \n\u2b50\ufe0f\u7eb5\u6709\u72c2\u98ce\u62d4\u5730\u8d77，\u6211\u4ea6\u4e58\u98ce\u7834\u4e07\u91cc\u2b50\ufe0f \u7f13\u51b2\u533a \u524d\u8a00：\u672c\u7bc7\u662f\u4e00\u7bc7\u77ed\u6587，\u5728\u8fd9\u91cc\u4e3b\u8981\u8fdb\u884c\u4ecb\u7ecd，\u6211\u4eec\u5bf9\u5e94\u7684\u7528\u6237\u7ea7\u7f13\u51b2\u548c\u5185\u6838\u7ea7\u7f13\u51b2\u533a\u7684\u4f5c\u7528\u4ee5\u53ca\u8fd9\u4e24\u79cd\u7f13\u51b2\u533a\u7684\u5237\u65b0\u673a\u5236，<\/p>\n","protected":false},"author":2,"featured_media":97994,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10187,55,58,43,44],"topic":[],"class_list":["post-98005","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-codingplan","tag-c","tag-linux","tag-43","tag-44"],"yoast_head":"\n\u3010Linux \u7bc7\u3011\u6570\u5b57\u4e16\u754c\u7684\u6c34\u6d41\u84c4\u6c34\u6c60 \u2014\u2014 IO \u7f13\u51b2\u533a\u673a\u5236\u6df1\u5ea6\u5b9e\u6218\u89e3\u6790 - 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