{"id":144,"date":"2011-09-06T11:17:19","date_gmt":"2011-09-06T03:17:19","guid":{"rendered":"http:\/\/www.kiccleaf.com\/?p=144"},"modified":"2020-08-28T12:27:17","modified_gmt":"2020-08-28T04:27:17","slug":"%e7%bc%96%e5%86%99%e4%b8%80%e4%b8%aa%e6%94%b9%e5%8f%98%e6%96%87%e4%bb%b6%e8%af%bb%e5%86%99%e5%b1%9e%e6%80%a7%e7%9a%84c%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"http:\/\/www.kiccleaf.com\/?p=144","title":{"rendered":"\u7f16\u5199\u4e00\u4e2a\u6539\u53d8\u6587\u4ef6\u8bfb\u5199\u5c5e\u6027\u7684C\u7a0b\u5e8f"},"content":{"rendered":"\n

\u7f16\u5199\u4e00\u4e2a\u6539\u53d8\u6587\u4ef6\u8bfb\u5199\u5c5e\u6027\u7684C\u7a0b\u5e8f<\/p>\n\n\n\n

[root@kiccleaf leaf]# ll\n\n-rwxr-xr-x  1 root root      5277 Aug  9 19:47 mysql.sh\n#\u91c7\u7528VIM\u7f16\u8f91c\u6e90\u7a0b\u5e8f\n[root@kiccleaf leaf]# vim chmd.c<\/code><\/pre>\n\n\n\n
#include <sys\/types.h>\r\n#include <sys\/stat.h>\r\n#include <stdio.h> \r\n \r\nint main()\r\n{\r\n  if(chmod(\".\/mysql.sh\",S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)==0)\r\n  {\r\n    printf(\"\u8bbe\u7f6e\u6210\u529f\uff01\\n\");\r\n  }\r\n  else\r\n  {\r\n    printf(\"\u8bbe\u7f6e\u5931\u8d25\uff01\u6587\u4ef6\u4e0d\u5b58\u5728\uff01\\n\");\r\n  }\r\n  return 0;\r\n}<\/code><\/pre>\n\n\n\n
#\u91c7\u7528gcc\u7f16\u8bd1\u751f\u6210chmd\u53ef\u6267\u884c\u6587\u4ef6\n[root@kiccleaf leaf]# gcc -g -Wall -o chmd chmd.c\n\n[root@kiccleaf leaf]# .\/chmd\n[root@kiccleaf leaf]# ll\n\n-rw-r--r--  1 root root      5277 Aug  9 19:47 mysql.sh<\/code><\/pre>\n\n\n\n
\u6587\u4ef6\u663e\u793a\u201c-rw-r–r–<\/span>\u201d
r \u8868\u793a\u53ef\u8bfb\u53d6\uff0cw \u8868\u793a\u53ef\u5199\u5165\uff0cx \u8868\u793a\u53ef\u6267\u884c\uff0cX \u8868\u793a\u53ea\u6709\u5f53\u8be5\u6863\u6848\u662f\u4e2a\u5b50\u76ee\u5f55\u6216\u8005\u8be5\u6863\u6848\u5df2\u7ecf\u88ab\u8bbe\u5b9a\u8fc7\u4e3a\u53ef\u6267\u884c\u3002<\/p>\n\n\n\n
chmod()\u6539\u53d8\u6587\u6863\u5b58\u53d6\u6743\u9650\u7684\u51fd\u6570<\/p>\n\n\n\n
\u539f\u5f62\uff1aint chmod(const char *path,int amode)<\/p>\n\n\n\n
\u529f\u80fd\uff1a\u6839\u636eamode\u7684\u503c\uff0c\u914d\u7f6e\u7531path\u6240\u6307\u6587\u6863\u7684\u5b58\u53d6\u6743\u9650\u3002<\/p>\n\n\n\n
amode\u7684\u503c\u3000\u3000\u3000\u3000\u3000\u5b58\u53d6\u6743\u9650<\/p>\n\n\n\n
S_IRUSR \u7528\u6237\u53ef\u4ee5\u8bfb
S_IWUSR \u7528\u6237\u53ef\u4ee5\u5199
S_IXUSR \u7528\u6237\u53ef\u4ee5\u6267\u884c
S_IRWXU \u7528\u6237\u53ef\u4ee5\u8bfb\u5199\u6267\u884c
———————————–
S_IRGRP \u7ec4\u53ef\u4ee5\u8bfb
S_IWGRP \u7ec4\u53ef\u4ee5\u5199
S_IXGRP \u7ec4\u53ef\u4ee5\u6267\u884c
S_IRWXG \u7ec4\u53ef\u4ee5\u8bfb\u5199\u6267\u884c
———————————–
S_IROTH \u5176\u4ed6\u4eba\u53ef\u4ee5\u8bfb
S_IWOTH \u5176\u4ed6\u4eba\u53ef\u4ee5\u5199
S_IXOTH \u5176\u4ed6\u4eba\u53ef\u4ee5\u6267\u884c
S_IRWXO \u5176\u4ed6\u4eba\u53ef\u4ee5\u8bfb\u5199\u6267\u884c
———————————–
S_ISUID \u8bbe\u7f6e\u7528\u6237\u6267\u884cID
S_ISGID \u8bbe\u7f6e\u7ec4\u7684\u6267\u884cID<\/p>\n\n\n\n
———————————–
\u8fd4\u56de\u503c\uff1a0(\u6210\u529f);-1(\u5931\u8d25)<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7f16\u5199\u4e00\u4e2a\u6539\u53d8\u6587\u4ef6\u8bfb\u5199\u5c5e\u6027\u7684C\u7a0b\u5e8f \u6587\u4ef6\u663e\u793a\u201c-rw…<\/p>\n
Continue reading\u7f16\u5199\u4e00\u4e2a\u6539\u53d8\u6587\u4ef6\u8bfb\u5199\u5c5e\u6027\u7684C\u7a0b\u5e8f<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":1,"footnotes":""},"categories":[27],"tags":[28,29],"class_list":["post-144","post","type-post","status-publish","format-standard","hentry","category-c","tag-c","tag-chmod","entry"],"views":3394,"_links":{"self":[{"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=144"}],"version-history":[{"count":1,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":744,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=\/wp\/v2\/posts\/144\/revisions\/744"}],"wp:attachment":[{"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.kiccleaf.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}