python检查目录文件权限并修改目录文件权限的操作

我就废话不多说了，还是直接看代码吧！

# -*- coding: utf-8 -*-
# @author flynetcn
import sys, os, pwd, stat, datetime;

LOG_FILE = '/var/log/checkDirPermission.log';

nginxWritableDirs = [
'/var/log/nginx',
'/usr/local/www/var',
];

otherReadableDirs = [
'/var/log/nginx',
'/usr/local/www/var/log',
];

dirs = [];
files = [];

def logger(level, str):
	logFd = open(LOG_FILE, 'a');
	logFd.write(datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')+": "+("WARNING " if level else "NOTICE ")+str);
	logFd.close();

def walktree(top, callback):
	for f in os.listdir(top):
		pathname = os.path.join(top, f);
		mode = os.stat(pathname).st_mode;
		if stat.S_ISDIR(mode):
			callback(pathname, True);
			walktree(pathname, callback);
		elif stat.S_ISREG(mode):
			callback(pathname, False);
		else:
			logger(1, "walktree skipping %s\n" % (pathname));

def collectPath(path, isDir=False):
	if isDir:
		dirs.append(path);
	else:
		files.append(path);

def checkNginxWritableDirs(paths):
	uid = pwd.getpwnam('nginx').pw_uid;
	gid = pwd.getpwnam('nginx').pw_gid;
	for d in paths:
		dstat = os.stat(d);
		if dstat.st_uid != uid:
			try:
				os.chown(d, uid, gid);
			except:
				logger(1, "chown(%s, nginx, nginx) failed\n" % (d));

def checkOtherReadableDirs(paths, isDir=False):
	for d in paths:
		dstat = os.stat(d);
		if isDir:
			checkMode = 5;
			willBeMode = dstat.st_mode | stat.S_IROTH | stat.S_IXOTH;
		else:
			checkMode = 4;
			willBeMode = dstat.st_mode | stat.S_IROTH;
		if int(oct(dstat.st_mode)[-1:]) & checkMode != checkMode:
			try:
					os.chmod(d, willBeMode);
			except:
				logger(1, "chmod(%s, %d) failed\n" % (d, oct(willBeMode)));

if __name__ == "__main__":
	for d in nginxWritableDirs:
		walktree(d, collectPath)
	dirs = dirs + files;
	checkNginxWritableDirs(dirs);
	dirs = [];
	files = [];
	for d in otherReadableDirs:
		walktree(d, collectPath)
	checkOtherReadableDirs(dirs, True);
	checkOtherReadableDirs(files, False);

补充知识：Python中获取某个用户对某个文件或目录的访问权限

在Python中我们通常可以使用os.access()函数来获取当前用户对某个文件或目录是否有某种权限，但是要获取某个用户对某个文件或目录是否有某种权限python中没有很好的方法直接获取，因此我写了个函数使用stat和pwd模块来实现这一功能。

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import pwd
import stat

def is_readable(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(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(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)
   )

使用方法

print is_readable('/home', root)
print is_writable('/home', root)
print is_executable('/home', root)

print is_readable('/tmp', admin)
print is_writable('/tmp', admin)
print is_executable('/tmp', admin)

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