[Bug locale/22089] New: [PATCH] locale: Call fchmod() before calling link()

["walters at verbum dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22089

            Bug ID: 22089
           Summary: [PATCH] locale: Call fchmod() before calling link()
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: locale
          Assignee: unassigned at sourceware dot org
          Reporter: walters at verbum dot org
  Target Milestone: ---

Created attachment 10395
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10395&action=edit
[PATCH] locale: Call fchmod() before calling link()

From d25853801c2a3cb8357b75b750af12bc6b43f75f Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Tue, 5 Sep 2017 16:55:34 -0400
Subject: [PATCH] locale: Call fchmod() before calling link()

The [rpm-ostree](https://github.com/projectatomic/rpm-ostree)
project implements atomic, online system upgrades using
[libostree](https://github.com/ostreedev/ostree/), which
contains a `rofiles-fuse` program:
https://github.com/ostreedev/ostree/blob/master/man/rofiles-fuse.xml

Currently rpm-ostree will run all scripts, such as glibc's
`build-locale-archive` with an rofiles-fuse mount active. This fails
because we call `fchmod()` *after* calling `link()`, and `rofiles-fuse`
rejects writes to files with multiple links.

There's no reason not to call `fchmod()` beforehand in all cases, so let's do
so
and fix the `rofiles-fuse` case.
---
 ChangeLog                    |  5 +++++
 locale/programs/locarchive.c | 18 +++++++++---------
 2 files changed, 14 insertions(+), 9 deletions(-)

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