我已经在某些Linux发行版(Debian,Linux Mint …)上测试了以下代码,并且可以正常工作,但是在CentOS下,即使我以root身份运行,也会出现错误：
#!/usr/bin/env python
import re
maps_file = open("/proc/18396/maps", 'r')
mem_file = open("/proc/18396/mem", 'r', 0)
for line in maps_file.readlines(): # for each mapped region
m = re.match(r'([0-9A-Fa-f]+)-([0-9A-Fa-f]+) ([-r])', line)
if m.group(3) == 'r': # if this is a readable region
start = int(m.group(1), 16)
end = int(m.group(2), 16)
mem_file.seek(start) # seek to region start
chunk = mem_file.read(end - start) # read region contents
print chunk, # dump contents to standard output
maps_file.close()
mem_file.close()
该脚本读取进程的内存并转储可读区域.在CentOS 5.4 x64下,出现以下错误：
Traceback (most recent call last):
File "./mem.py", line 11, in ?
chunk = mem_file.read(end - start) # read region contents
IOError: [Errno 3] No such process
该过程是活跃且可读的：
[root@localhost ~]# ps xa|grep 18396
18396 ? S 0:00 /usr/sbin/httpd
[root@localhost ~]# ls -al /proc/18396/maps && ls -al /proc/18396/mem
-r--r--r-- 1 root root 0 Jan 31 17:26 /proc/18396/maps
-rw------- 1 root root 0 Jan 31 17:26 /proc/18396/mem
任何想法？我在Python 2.4下尝试过,而Python 2.7在类似Debian的发行版上工作,但在CentOS下却没有.
