Bug 1810141 - glibc: Fix fchmodat implementing, using real syscall & /proc fallback
Summary: glibc: Fix fchmodat implementing, using real syscall & /proc fallback
Keywords:
Status: CLOSED DEFERRED
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: glibc
Version: 8.3
Hardware: All
OS: Linux
unspecified
medium
Target Milestone: pre-dev-freeze
: 8.3
Assignee: glibc team
QA Contact: qe-baseos-tools-bugs
URL:
Whiteboard:
Depends On: 1802018 1856394
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-03-04 15:36 UTC by Florian Weimer
Modified: 2023-07-18 14:30 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1802018
Environment:
Last Closed: 2020-07-13 13:50:19 UTC
Type: Enhancement
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Sourceware 14578 0 P2 RESOLVED /proc-based emulation for lchmod, fchmodat 2020-11-06 14:01:57 UTC

Description Florian Weimer 2020-03-04 15:36:10 UTC 
+++ This bug was initially created as a clone of Bug #1802018 +++

gnulib has added emulation of lchmod, fchmodat based on /proc, and glibc upstream will do so as well. We need to integrate the glibc changes into Fedora so that GNU applications can be built properly.

Related commits:

173ec37bb2af6e30892a141d74d42db5957ddd36	support: Add the xlstat function
f6233ab412c3bebebacf65745e775e01506dd58d	Linux: Add io/tst-o_path-locks test
6b89c385d8bd0700b25bac2c2d0bebe68d5cc05d	io: Implement lchmod using fchmodat [BZ #14578]
752dd17443e55a4535cb9e6baa4e550ede383540	Linux: Emulate fchmodat with AT_SYMLINK_NOFOLLOW using O_PATH [BZ #14578]
47136d6cc38c425b150dda83989303ac55f6443c	io: Add io/tst-lchmod covering lchmod and fchmodat
fa185f0d4529c6d70f690306f431ca23662b9138	<fd_to_filename.h>: Add type safety and port to Hurd
a492b1e5ef7ab50c6fdd4e4e9879ea5569ab0a6c	Linux: Work around kernel bugs in chmod on /proc/self/fd paths [BZ #14578]

Plus one more to actually use fd_to_filename.h.
Comment 3 Florian Weimer 2020-07-13 13:50:19 UTC 
I pinged the old fchmodat4 submission to the kernel, but did not receive any reply. This is effectively blocked until we get the system call in the kernel.
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