“`” \u53c2\u8003\u56de\u7b54\uff1a<\/p>\n
1\uff09\u6982\u5ff5\uff1a<\/p>\n
\u5728\u8ba1\u7b97\u673a\u4e2d\uff0c\u7cfb\u7edf\u8c03\u7528\uff08\u82f1\u8bed\uff1asystem call\uff09\uff0c\u53c8\u79f0\u4e3a\u7cfb\u7edf\u547c\u53eb\uff0c\u6307\u8fd0\u884c\u5728\u4f7f\u7528\u8005\u7a7a\u95f4\u7684\u7a0b\u5e8f\u5411\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u8bf7\u6c42\u9700\u8981\u66f4\u9ad8\u6743\u9650\u8fd0\u884c\u7684\u670d\u52a1\u3002\u7cfb\u7edf\u8c03\u7528\u63d0\u4f9b\u4e86\u7528\u6237\u7a0b\u5e8f\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u4e4b\u95f4\u7684\u63a5\u53e3\uff08\u5373\u7cfb\u7edf\u8c03\u7528\u662f\u7528\u6237\u7a0b\u5e8f\u548c\u5185\u6838\u4ea4\u4e92\u7684\u63a5\u53e3\uff09\u3002<\/p>\n
\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684\u72b6\u6001\u5206\u4e3a\u7ba1\u6001\uff08\u6838\u5fc3\u6001\uff09\u548c\u76ee\u6001\uff08\u7528\u6237\u6001\uff09\u3002\u5927\u591a\u6570\u7cfb\u7edf\u4ea4\u4e92\u5f0f\u64cd\u4f5c\u9700\u6c42\u5728\u5185\u6838\u6001\u6267\u884c\u3002\u5982\u8bbe\u5907IO\u64cd\u4f5c\u6216\u8005\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002\u7279\u6743\u6307\u4ee4\uff1a\u4e00\u7c7b\u53ea\u80fd\u5728\u6838\u5fc3\u6001\u4e0b\u8fd0\u884c\u800c\u4e0d\u80fd\u5728\u7528\u6237\u6001\u4e0b\u8fd0\u884c\u7684\u7279\u6b8a\u6307\u4ee4\u3002\u4e0d\u540c\u7684\u64cd\u4f5c\u7cfb\u7edf\u7279\u6743\u6307\u4ee4\u4f1a\u6709\u6240\u5dee\u5f02\uff0c\u4f46\u662f\u4e00\u822c\u6765\u8bf4\u4e3b\u8981\u662f\u548c\u786c\u4ef6\u76f8\u5173\u7684\u4e00\u4e9b\u6307\u4ee4\u3002\u7528\u6237\u7a0b\u5e8f\u53ea\u5728\u7528\u6237\u6001\u4e0b\u8fd0\u884c\uff0c\u6709\u65f6\u9700\u8981\u8bbf\u95ee\u7cfb\u7edf\u6838\u5fc3\u529f\u80fd\uff0c\u8fd9\u65f6\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u4f7f\u7528\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n
\u5e94\u7528\u7a0b\u5e8f\u6709\u65f6\u4f1a\u9700\u8981\u4e00\u4e9b\u5371\u9669\u7684\u3001\u6743\u9650\u5f88\u9ad8\u7684\u6307\u4ee4\uff0c\u5982\u679c\u628a\u8fd9\u4e9b\u6743\u9650\u653e\u5fc3\u5730\u4ea4\u7ed9\u7528\u6237\u7a0b\u5e8f\u662f\u5f88\u5371\u9669\u7684(\u6bd4\u5982\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u80fd\u4fee\u6539\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u7684\u5185\u5b58\u533a\uff0c\u5bfc\u81f4\u5176\u4e0d\u80fd\u8fd0\u884c)\uff0c\u4f46\u662f\u53c8\u4e0d\u80fd\u5b8c\u5168\u4e0d\u7ed9\u8fd9\u4e9b\u6743\u9650\u3002\u4e8e\u662f\u6709\u4e86\u7cfb\u7edf\u8c03\u7528\uff0c\u5371\u9669\u7684\u6307\u4ee4\u88ab\u5305\u88c5\u6210\u7cfb\u7edf\u8c03\u7528\uff0c\u7528\u6237\u7a0b\u5e8f\u53ea\u80fd\u8c03\u7528\u800c\u65e0\u6743\u81ea\u5df1\u8fd0\u884c\u90a3\u4e9b\u5371\u9669\u7684\u6307\u4ee4\u3002\u53e6\u5916\uff0c\u8ba1\u7b97\u673a\u786c\u4ef6\u7684\u8d44\u6e90\u662f\u6709\u9650\u7684\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u7ba1\u7406\u8fd9\u4e9b\u8d44\u6e90\uff0c\u6240\u6709\u7684\u8d44\u6e90\u90fd\u7531\u64cd\u4f5c\u7cfb\u7edf\u63a7\u5236\uff0c\u8fdb\u7a0b\u53ea\u80fd\u5411\u64cd\u4f5c\u7cfb\u7edf\u8bf7\u6c42\u8fd9\u4e9b\u8d44\u6e90\u3002\u64cd\u4f5c\u7cfb\u7edf\u662f\u8fd9\u4e9b\u8d44\u6e90\u7684\u552f\u4e00\u5165\u53e3\uff0c\u8fd9\u4e2a\u5165\u53e3\u5c31\u662f\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n
2\uff09\u7cfb\u7edf\u8c03\u7528\u4e3e\u4f8b\uff1a<\/p>\n
\u5bf9\u6587\u4ef6\u8fdb\u884c\u5199\u64cd\u4f5c\uff0c\u7a0b\u5e8f\u5411\u6253\u5f00\u7684\u6587\u4ef6\u5199\u5165\u5b57\u7b26\u4e32\u201chello world\u201d\uff0copen\u548cwrite\u90fd\u662f\u7cfb\u7edf\u8c03\u7528\u3002\u5982\u4e0b\uff1a<\/p>\n
<pre><code class=""language-c++"" lang=""c++"">#include<stdio.h>
\n#include<stdlib.h>
\n#include<string.h>
\n#include<errno.h>
\n#include<unistd.h>
\n#include<sys\/types.h>
\n#include<sys\/stat.h>
\n#include<fcntl.h>
\nint main(int argc, char *argv[])
\n{
\n if (argc<2)
\n return 0;
\n \/\/\u7528\u8bfb\u5199\u8ffd\u52a0\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u6587\u4ef6
\n int fd = open(argv[1], O_RDWR | O_APPEND);
\n if (fd == -1)
\n {
\n printf(""error is %s\\n"", strerror(errno));
\n }
\n else
\n {
\n \/\/\u6253\u5370\u6587\u4ef6\u63cf\u8ff0\u7b26\u53f7
\n printf(""success fd = %d\\n"", fd);
\n char buf[100];
\n memset(buf, 0, sizeof(buf));
\n strcpy(buf, ""hello world\\n"");
\n write(fd, buf, strlen(buf));
\n close(fd);
\n }
\n return 0;
\n}
\n<\/code><\/pre><\/p>\n
\u8fd8\u6709\u5199\u6570\u636ewrite\uff0c\u521b\u5efa\u8fdb\u7a0bfork\uff0cvfork\u7b49\u90fd\u662f\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u53c2\u8003\u56de\u7b54\uff1a 1\uff09\u6982\u5ff5\uff1a \u5728\u8ba1\u7b97\u673a\u4e2d\uff0c\u7cfb\u7edf\u8c03\u7528\uff08\u82f1\u8bed\uff1asystem call\uff09\uff0c […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-46873","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=46873"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46873\/revisions"}],"predecessor-version":[{"id":46874,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46873\/revisions\/46874"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=46873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=46873"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=46873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}