Description

assignee = None
closed_at = None
created_at = <Date 2017-08-31.09:55:01.045>
labels = ['3.7', 'type-feature', 'library']
title = 'Feature Add support of os.chflags() on Linux platform'
updated_at = <Date 2017-09-01.09:27:54.508>
user = 'https://github.com/socketpair'

activity = <Date 2017-09-01.09:27:54.508>
actor = 'pitrou'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-08-31.09:55:01.045>
creator = 'socketpair'
dependencies = []
files = ['47115']
hgrepos = []
issue_num = 31313
keywords = []
message_count = 5.0
messages = ['301043', '301046', '301089', '301091', '301092']
nosy_count = 4.0
nosy_names = ['pitrou', 'larry', 'neologix', 'socketpair']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31313'
versions = ['Python 3.7']

Activity

1. socketpair commented on Aug 31, 2017

   

   socketpairmannequin

   on Aug 31, 2017

   MannequinAuthor

   More actions

   Yes, chflags() is not supported by linux directly. But actually, Linux supports chflags functionality:

   https://stackoverflow.com/questions/34176464/why-os-chflags-doesnt-work-under-linux

   through

   ioctl (fd, EXT2_IOC_SETFLAGS, <BITMASK_OF_FLAGS>)
2. socketpair

   added

   3.7 (EOL)end of lifeend of life

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   type-featureA feature request or enhancementA feature request or enhancement

   on Aug 31, 2017
3. pitrou commented on Aug 31, 2017

   

   pitrou

   on Aug 31, 2017

   Member

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   Judging by the ioctl name, this is ext2/ext3/ext4 specific?
4. socketpair commented on Sep 1, 2017

   

   socketpairmannequin

   on Sep 1, 2017

   MannequinAuthor

   More actions

   Well, it seems, you are right.

   But there are another ioctls (maybe they are the same, I haven't checked):

   FS_IOC_SETFLAGS
   FS_IOC_GETFLAGS

   http://man7.org/tlpi/code/online/book/files/chiflag.c.html (also attached)
5. pitrou commented on Sep 1, 2017

   

   pitrou

   on Sep 1, 2017

   Member

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   On Ubuntu 16.04 I get the following values:
   EXT2_IOC_SETFLAGS = 0x40086602, FS_IOC_GETFLAGS = 0x80086601
6. pitrou commented on Sep 1, 2017

   

   pitrou

   on Sep 1, 2017

   Member

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   Uh, of course, we care about SETFLAGS here. Which gives:
   EXT2_IOC_SETFLAGS = 0x40086602, FS_IOC_SETFLAGS = 0x40086602
7. ezio-melotti

   transferred this issue fromon Apr 10, 2022
8. serhiy-storchaka

   added this to OS issues 💻on Jul 3, 2026
9. github-project-automation

   moved this to Todo in OS issues 💻on Jul 3, 2026
10. encukou commented on Aug 25, 2026

    

    encukou

    on Aug 25, 2026

    Member

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    FS_IOC flags are different from the stat.UF_* & stat.SF_* that os.chflags operates on.
    If we add them, they should use a different function, perhaps in fcntl or around statx, or use the chattr name.

    Feature proposals should go on Discourse nowadays; ideally with a use case.
11. encukou

    closed this as completedon Aug 25, 2026
12. github-project-automation

    moved this from Todo to Done in OS issues 💻on Aug 25, 2026
13. encukou

    marked Linux's chattr i.e. ioctl(FS_IOC_SETFLAGS) is not supported in os.chflags() #87105 as a duplicate of this issue on Aug 25, 2026

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