{"id":36458,"date":"2024-11-26T08:37:12","date_gmt":"2024-11-26T00:37:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36458\/"},"modified":"2024-11-26T08:37:12","modified_gmt":"2024-11-26T00:37:12","slug":"%e5%9c%a8linux%e4%b8%8b%e5%88%9b%e5%bb%bafifo%e6%96%87%e4%bb%b6%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36458\/","title":{"rendered":"\u5728Linux\u4e0b\u521b\u5efaFIFO\u6587\u4ef6\u7c7b\u578b"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/887\/227\/172683634695341.jpg\" class=\"aligncenter\" title=\"\u5728Linux\u4e0b\u521b\u5efaFIFO\u6587\u4ef6\u7c7b\u578b\u63d2\u56fe\" alt=\"\u5728Linux\u4e0b\u521b\u5efaFIFO\u6587\u4ef6\u7c7b\u578b\u63d2\u56fe\" \/><\/p>\n<p>FIFO\uff0c\u53c8\u79f0\u4f5c\u547d\u540d\u7ba1\u9053(named pipe)\uff0c\u5b83\u662fLinux\u7cfb\u7edf\u4e2d\u7528\u4e8e\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u4e00\u79cd\u65b9\u6cd5\u3002<\/p>\n<p><strong>FIFO\u548cpipe\u7684\u533a\u522b\u5728\u4e8e\uff1a<\/strong>  <\/p>\n<p>FIFO\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u6709\u5bf9\u5e94\u7684inode\uff0c\u53ef\u4ee5\u901a\u8fc7ls\u547d\u4ee4\u67e5\u770b\u3002<\/p>\n<pre>sh-3.2# ls -lhF \u3002\/fifo_file\n\n100 prwxrwxrwx 1 root root 0 Jan 1 1970 \u3002\/fifo_file|\n\nsh-3.2#<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6b63\u56e0\u4e3a\u5b83\u6709\u4e00\u4e2a\u540d\u5b57\uff0c\u6240\u4ee5\u4efb\u4f55\u8fdb\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5b83\uff0c\u6240\u4ee5FIFO\u53ef\u7528\u4e8e\u4efb\u610f\u4e24\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n<p>pipe\u6ca1\u6709\u540d\u5b57\uff0c\u5728\u73b0\u6709\u6587\u4ef6\u7cfb\u7edf\u4e2d\u65e0\u6cd5\u67e5\u770b\u5230\u5b83\u7684\u5b58\u5728\u3002<\/p>\n<p>\u5b83\u53ea\u80fd\u7528\u4e8e\u7236\u5b50\u8fdb\u7a0b\u3001\u5144\u5f1f\u8fdb\u7a0b\u7b49\u5177\u6709\u8840\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/p>\n<p><strong>\u521b\u5efaFIFO\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a<\/strong>  <\/p>\n<p>1. \u8c03\u7528umask\u7cfb\u7edf\u8c03\u7528\u6765\u8bbe\u5b9a\u521b\u5efa\u6587\u4ef6\u7684\u6743\u9650\uff0c<\/p>\n<pre>#include \u300asys\/types.h\u300b\n\n#include \u300asys\/stat\/h\u300b\n\nmode_t umask(mode_t mask);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>2. \u8c03\u7528unlink\u7cfb\u7edf\u8c03\u7528\u5148\u5220\u9664\u5df2\u7ecf\u5b58\u5728\u7684fifo\uff0c<\/p>\n<pre>#include \u300aunistd.h\u300b\n\nint unlink(const char *pathname);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>3. \u8c03\u7528mkfifo\u5e93\u51fd\u6570\u53bb\u521b\u5efa\u4e00\u4e2aFIFO\u6587\u4ef6\uff0c<\/p>\n<pre>#include \u300asys\/types.h\u300b\n\n#include \u300asys\/stat.h\u300b\n\nint mkfifo(const char *pathname\uff0c mode_t mode);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6216\u8005\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528mknod\u7cfb\u7edf\u8c03\u7528\u5e76\u4e14\u6307\u5b9a\u53c2\u6570mode\u4e3aS_IFIFO\u4e5f\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aFIFO\u6587\u4ef6\uff0c<\/p>\n<pre>#include \u300asys\/types.h\u300b\n\n#include \u300asys\/stat.h\u300b\n\n#include \u300afcntl.h\u300b\n\n#include \u300aunistd.h\u300b\n\nint mknod(const char *pathname\uff0c mode_t mode\uff0c dev_t dev);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236<br \/>\n<strong>\u6ce8\u610f\uff1a<\/strong>  <\/p>\n<p>1. \u4f7f\u7528FIFO\u8fdb\u884c\u901a\u4fe1\uff0c\u6bcf\u6b21\u4f20\u8f93\u7684\u6570\u636e\u8981\u9650\u5b9a\u5728PIPE_BUF\u4e4b\u5185;<\/p>\n<p>2. \u5bf9\u4e8eFIFO\u7684\u8bbf\u95ee\u5c31\u50cf\u8bbf\u95ee\u6b63\u89c4\u6587\u4ef6(regular file)\u4e00\u6837\uff0c\u53ef\u4ee5\u4f7f\u7528<span style=\"padding: 4px 8px;font-size: 12px;border-radius: 3px;color: #c7254e;background-color: #f9f2f4\">open\/read\/write\/close<\/span>\u7b49\u7cfb\u7edf\u8c03\u7528\u8fdb\u884c\u8bbf\u95ee\u3002<\/p>\n<p><strong>\u4f7f\u7528FIFO\u7684\u5e94\u7528\u6709\uff1a<\/strong>  <\/p>\n<p>1. \u5355\u7eaf\u7684\u751f\u4ea7\u8005\/\u6d88\u8d39\u8005\u95ee\u9898\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u8bfb\u6570\u636e\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u5199\u6570\u636e;<\/p>\n<p>2. \u5b9e\u73b0client\/server\u67b6\u6784\u7684\u7a0b\u5e8f\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u901a\u8fc7FIFO\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n<p>\u4e0a\u9762\u5c31\u662fLinux\u521b\u5efaFIFO\u7ba1\u9053\u7684\u65b9\u6cd5\u4ecb\u7ecd\u4e86\uff0c\u672c\u6587\u9664\u4e86\u4ecb\u7ecd\u4e86FIFO\u7ba1\u9053\u7684\u521b\u5efa\u5916\uff0c\u8fd8\u7a0d\u5fae\u4ecb\u7ecd\u4e86\u4e0bFIFO\u7684\u4f7f\u7528\u53ca\u5176\u6ce8\u610f\u4e8b\u9879\uff0c\u5728\u4f7f\u7528\u7684\u65f6\u5019\u9700\u7279\u522b\u6ce8\u610f\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5728Linux\u4e0b\u521b\u5efaFIFO\u6587\u4ef6\u7c7b\u578b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; FIFO\uff0c\u53c8\u79f0\u4f5c\u547d\u540d\u7ba1\u9053(named pipe)\uff0c\u5b83\u662fLinux\u7cfb\u7edf\u4e2d\u7528\u4e8e\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u4e00\u79cd\u65b9\u6cd5\u3002 FIFO\u548cpipe\u7684\u533a\u522b\u5728\u4e8e\uff1a FIFO\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u6709\u5bf9\u5e94\u7684inode\uff0c\u53ef\u4ee5\u901a\u8fc7ls\u547d\u4ee4\u67e5\u770b\u3002 sh-3.2# ls -lhF \u3002\/fifo_file 100 prwxrwxrwx 1 root root 0 Jan 1 1970 \u3002\/fifo_file| sh-3.2# \u767b\u5f55\u540e\u590d\u5236 \u6b63\u56e0\u4e3a\u5b83\u6709\u4e00\u4e2a\u540d\u5b57\uff0c\u6240\u4ee5\u4efb\u4f55\u8fdb\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5b83\uff0c\u6240\u4ee5FIFO\u53ef\u7528\u4e8e\u4efb\u610f\u4e24\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\u3002 pipe\u6ca1\u6709\u540d\u5b57\uff0c\u5728\u73b0\u6709\u6587\u4ef6\u7cfb\u7edf\u4e2d\u65e0\u6cd5\u67e5\u770b\u5230\u5b83\u7684\u5b58\u5728\u3002 \u5b83\u53ea\u80fd\u7528\u4e8e\u7236\u5b50\u8fdb\u7a0b\u3001\u5144\u5f1f\u8fdb\u7a0b\u7b49\u5177\u6709\u8840\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002 \u521b\u5efaFIFO\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a 1. \u8c03\u7528umask\u7cfb\u7edf\u8c03\u7528\u6765\u8bbe\u5b9a\u521b\u5efa\u6587\u4ef6\u7684\u6743\u9650\uff0c #include \u300asys\/types.h\u300b #include \u300asys\/stat\/h\u300b mode_t umask(mode_t mask); \u767b\u5f55\u540e\u590d\u5236 2. \u8c03\u7528unlink\u7cfb\u7edf\u8c03\u7528\u5148\u5220\u9664\u5df2\u7ecf\u5b58\u5728\u7684fifo\uff0c #include \u300aunistd.h\u300b int unlink(const char *pathname); \u767b\u5f55\u540e\u590d\u5236 3. \u8c03\u7528mkfifo\u5e93\u51fd\u6570\u53bb\u521b\u5efa\u4e00\u4e2aFIFO\u6587\u4ef6\uff0c #include \u300asys\/types.h\u300b #include \u300asys\/stat.h\u300b int mkfifo(const char *pathname\uff0c mode_t [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-36458","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=36458"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36458\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}