{"id":3581,"date":"2017-08-26T09:52:04","date_gmt":"2017-08-26T01:52:04","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3581"},"modified":"2017-08-26T09:52:04","modified_gmt":"2017-08-26T01:52:04","slug":"linux%e4%b8%8b%e5%b8%b8%e7%94%a8%e7%9a%84c%e8%af%ad%e8%a8%80%e4%bb%a3%e7%a0%81%e7%89%87%e6%ae%b5","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3581.html","title":{"rendered":"Linux\u4e0b\u5e38\u7528\u7684C\u8bed\u8a00\u4ee3\u7801\u7247\u6bb5"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u5b66\u4e60\u3001\u63d0\u9ad8\u9700\u8981<\/p>\n

\u6b63\u6587\uff1a<\/h4>\n

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n

\u5c06\u6587\u4ef6\u5185\u5bb9\u6574\u4f53\u8bfb\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32
\nhttps:\/\/stackoverflow.com\/questions\/174531\/easiest-way-to-get-files-contents-in-c<\/a>\u00a0# malloc+fread \/ mmap
\nhttps:\/\/stackoverflow.com\/questions\/14002954\/c-programming-how-to-read-the-whole-file-contents-into-a-buffer<\/a>
\nhttps:\/\/stackoverflow.com\/questions\/3747086\/reading-the-whole-text-file-into-a-char-array-in-c<\/a><\/p>\n

\n
\n
\n
\n\n\n\n
\n
\n
char<\/code>\u00a0*file_to_str(<\/code>const<\/code>\u00a0char<\/code>\u00a0*filename) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*buffer = NULL;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>long<\/code>\u00a0length;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>FILE *f = fopen (filename,\u00a0<\/code>\"rb\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(f) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>fseek (f,\u00a0<\/code>0<\/code>, SEEK_END);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>length = ftell (f);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>fseek (f,\u00a0<\/code>0<\/code>, SEEK_SET);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>buffer = malloc (length);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(buffer) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>fread (buffer,\u00a0<\/code>1<\/code>, length, f);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>fclose (f);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a0buffer;<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u53bb\u9664\u884c\u5c3e\u7684\u6362\u884c\u7b26
\nhttps:\/\/stackoverflow.com\/questions\/2693776\/removing-trailing-newline-character-from-fgets-input<\/a><\/p>\n

\n
\n
\n
\n\n\n\n
\n
\n
line[strcspn(line,\u00a0<\/code>\"\\r\\n\"<\/code>)] =\u00a0<\/code>0<\/code>;\u00a0\u00a0\u00a0\u00a0<\/code>\/\/ remove trailing newline character<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u7528C\u8bed\u8a00\u5199\u6587\u4ef6
\nhttps:\/\/stackoverflow.com\/questions\/2008267\/how-to-write-a-file-with-c-in-linux<\/a>
\nhttps:\/\/stackoverflow.com\/questions\/24249369\/how-to-write-pid-to-file-on-unix<\/a><\/p>\n

\n
\n
\n
\n\n\n\n
\n
\n
# \u5148\u5c06<\/code>int<\/code>\u8f6c\u6362\u6210<\/code>char<\/code>\u00a0*\u7c7b\u578b(convert\u00a0<\/code>int<\/code>\u00a0to string first)\u7136\u540e\u5199\u5165<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

 <\/p>\n

=END=<\/p>\n","protected":false},"excerpt":{"rendered":"

=Start= \u7f18\u7531\uff1a \u5b66\u4e60\u3001\u63d0\u9ad8\u9700\u8981 \u6b63\u6587\uff1a \u53c2\u8003\u89e3\u7b54\uff1a \u5c06\u6587\u4ef6\u5185\u5bb9\u6574\u4f53\u8bfb\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32 https:\/\/st […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7],"tags":[100,930,30],"class_list":["post-3581","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","tag-c","tag-code","tag-linux"],"views":6187,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=3581"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3581\/revisions"}],"predecessor-version":[{"id":3582,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3581\/revisions\/3582"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=3581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=3581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=3581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}