[Bug libc/28996] New: realpath fails to copy partial result to resolved buffer on ENOENT and EACCES

[Bug libc/28996] New: realpath fails to copy partial result to resolved buffer on ENOENT and EACCES

[siddhesh at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28996

            Bug ID: 28996
           Summary: realpath fails to copy partial result to resolved
                    buffer on ENOENT and EACCES
           Product: glibc
           Version: 2.35
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: siddhesh at sourceware dot org
          Reporter: siddhesh at sourceware dot org
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

The fix for bug 28815 resulted in a regression in the GNU extension which says
that the resolved buffer will have the path that failed in case failure is due
to ENOENT or EACCES.

Bring back that behaviour to continue supporting the GNU extension.

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[Bug libc/28996] realpath fails to copy partial result to resolved buffer on ENOENT and EACCES

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28996

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Siddhesh Poyarekar
<siddhesh@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b416555431b47a21a855f225c6f5368ae4e4d56c

commit b416555431b47a21a855f225c6f5368ae4e4d56c
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Thu Mar 31 22:00:58 2022 +0530

    realpath: Bring back GNU extension on ENOENT and EACCES [BZ #28996]

    The GNU extension for realpath states that if the path resolution fails
    with ENOENT or EACCES and the resolved buffer is non-NULL, it will
    contain part of the path that failed resolution.

    commit 949ad78a189194048df8a253bb31d1d11d919044 broke this when it
    omitted the copy on failure.  Bring it back partially to continue
    supporting this GNU extension.

    Resolves: BZ #28996

    Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
    Reviewed-by: Andreas Schwab <schwab@linux-m68k.org>

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[Bug libc/28996] realpath fails to copy partial result to resolved buffer on ENOENT and EACCES

[siddhesh at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28996

Siddhesh Poyarekar <siddhesh at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|2.35                        |2.36
   Target Milestone|---                         |2.36
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #2 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
Fixed.

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[Bug libc/28996] realpath fails to copy partial result to resolved buffer on ENOENT and EACCES

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28996

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=28815

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