Issue reading files under /proc/acpi using python.

[Srihari Vijayaraghavan <harisri-bzGI/hKkdgRBDgjK7y7TUQ@public.gmane.org>]

Hello,

While I can read /proc/acpi files fine using 'cat', python is unable to read 
files under that directory.

Here is how you can reproduce the issue:

$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         65120 mWh
last full capacity:      61627 mWh
battery technology:      rechargeable
design voltage:          14800 mV
design capacity warning: 6156 mWh
design capacity low:     0 mWh
capacity granularity 1:  1480 mWh
capacity granularity 2:  1480 mWh
model number:            4000
serial number:           1
battery type:
OEM info:                 COMPAQ
$
$ cat /proc/version
Linux version 2.4.21-pre4-acpi (hari-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org) (gcc version 3.2 
20020903 (Red Hat Linux 8.0 3.2-7)) #1 Thu Feb 6 00:12:06 EST 2003
$
$ python
Python 2.2.1 (#1, Aug 30 2002, 12:15:30)
[GCC 3.2 20020822 (Red Hat Linux Rawhide 3.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> file("/proc/acpi/battery/BATO/info").read()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: [Errno 2] No such file or directory: '/proc/acpi/battery/BATO/info'
>>> file("/proc/version").read()
'Linux version 2.4.21-pre4-acpi (hari-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org) (gcc version 3.2 
20020903 (Red Hat Linux 8.0 3.2-7)) #1 Thu Feb 6 00:12:06 EST 2003\n'
>>>

Softwares involved:
Kernel: Linux-2.4.21-pre4 + acpi-20030125-2.4.21-pre3.diff.gz
Rest all as in Red Hat 8.0 (with official updates)
(BTW same behavior is observed with Red Hat beta 8.1, which has updated 
versions of gcc, glibc, python etc..)

It will be great if I can read all the ascii text files under /proc/acpi using 
python, like /proc/cpuinfo, /proc/meminfo, /proc/version etc.. files.

Thanks
-- 
Hari
harisri-bzGI/hKkdgRBDgjK7y7TUQ@public.gmane.org



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