在Python我们要判断一个文件对当前用户有没有读、写、执行权限，我们通常可以使用os.access函数来实现，比如：
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# 判断读权限os.access(<my file>, os.R_OK)# 判断写权限os.access(<my file>, os.W_OK)# 判断执行权限os.access(<my file>, os.X_OK)# 判断读、写、执行权限os.access(<my file>, os.R_OK | os.W_OK | os.X_OK) |
但是如果要判断任意一个指定的用户对某个文件是否有读、写、执行权限，Python中是没有默认实现的，此时我们可以通过下面的代码断来判断
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import osimport pwdimport stat def is_readable(cls, path, user): user_info = pwd.getpwnam(user) uid = user_info.pw_uid gid = user_info.pw_gid s = os.stat(path) mode = s[stat.ST_MODE] return ( ((s[stat.ST_UID] == uid) and (mode & stat.S_IRUSR > 0)) or ((s[stat.ST_GID] == gid) and (mode & stat.S_IRGRP > 0)) or (mode & stat.S_IROTH > 0) )def is_writable(cls, path, user): user_info = pwd.getpwnam(user) uid = user_info.pw_uid gid = user_info.pw_gid s = os.stat(path) mode = s[stat.ST_MODE] return ( ((s[stat.ST_UID] == uid) and (mode & stat.S_IWUSR > 0)) or ((s[stat.ST_GID] == gid) and (mode & stat.S_IWGRP > 0)) or (mode & stat.S_IWOTH > 0) )def is_executable(cls, path, user): user_info = pwd.getpwnam(user) uid = user_info.pw_uid gid = user_info.pw_gid s = os.stat(path) mode = s[stat.ST_MODE] return ( ((s[stat.ST_UID] == uid) and (mode & stat.S_IXUSR > 0)) or ((s[stat.ST_GID] == gid) and (mode & stat.S_IXGRP > 0)) or (mode & stat.S_IXOTH > 0) ) |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.kongxx.info/blog/?p=610
