Python 查看文件的读写权限

# -*- 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);

os.chmod(path,mode) 这个方法应该很简单，只需要2个参数，一个是路径，一个是说明路径的模式，下面列出了这个用法中可以使用的一些常用的模式：

stat.S_ISUID: Set user ID on execution. 不常用

stat.S_ISGID: Set group ID on execution. 不常用

stat.S_ENFMT: Record locking enforced. 不常用

stat.S_ISVTX: Save text image after execution. 在执行之后保存文字和图片

stat.S_IREAD: Read by owner. 对于拥有者读的权限

stat.S_IWRITE: Write by owner. 对于拥有者写的权限

stat.S_IEXEC: Execute by owner. 对于拥有者执行的权限

stat.S_IRWXU: Read, write, and execute by owner. 对于拥有者读写执行的权限

stat.S_IRUSR: Read by owner. 对于拥有者读的权限

stat.S_IWUSR: Write by owner. 对于拥有者写的权限

stat.S_IXUSR: Execute by owner. 对于拥有者执行的权限

stat.S_IRWXG: Read, write, and execute by group. 对于同组的人读写执行的权限

stat.S_IRGRP: Read by group. 对于同组读的权限

stat.S_IWGRP: Write by group. 对于同组写的权限

stat.S_IXGRP: Execute by group. 对于同组执行的权限

stat.S_IRWXO: Read, write, and execute by others. 对于其他组读写执行的权限

stat.S_IROTH: Read by others. 对于其他组读的权限

stat.S_IWOTH: Write by others. 对于其他组写的权限

stat.S_IXOTH: Execute by others. 对于其他组执行的权限

>>> os.stat('test')

posix.stat_result(st_mode=33204, st_ino=93328670, st_dev=18L, st_nlink=1, st_uid=30448, st_gid=1000, st_size=0, st_atime=1445932321, st_mtime=1445932321, st_ctime=1445932321)

>>> os.stat('test').st_mode

33204

>>> oct(os.stat('test').st_mode)

'0100664'

>>> oct(os.stat('test').st_mode)[-3:]

'664'