[Bug libc/12713] New: coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[Bug libc/12713] New: coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[jason.vas.dias at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12713

           Summary: coreutils-8.12 "make check" thinks glibc-2.13's
                    "getcwd()" is "buggy"
           Product: glibc
           Version: 2.13
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: jason.vas.dias@gmail.com


The latest "stable coreutils release", 8.12, SKIPS a test it normally runs
as part of its 
$ make check
...
./misc/pwd-unreadable-parent: skipping test: can't use buggy system getcwd
SKIP: misc/pwd-unreadable-parent
....

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[Bug libc/12713] coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[eblake at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12713

Eric Blake <eblake at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eblake at redhat dot com

--- Comment #1 from Eric Blake <eblake at redhat dot com> 2011-04-28 19:00:18 UTC ---
Glibc should consider borrowing code from gnulib's getcwd() implementation,
which is able to successfully determine working directories for several cases
where the getcwd(2) syscall fails and where glibc currently doesn't try any
harder:

http://git.savannah.gnu.org/cgit/gnulib.git/tree/lib/getcwd.c

At one point, that code was forked from glibc, but gnulib's version has added
additional improvements such as the use of openat() to get an answer in O(n)
rather than O(n^2) time.

Here's a sample program from gnulib that demonstrates a case of glibc giving up
too easily:

http://git.savannah.gnu.org/cgit/gnulib.git/tree/tests/test-getcwd.c

You can demonstrate the glibc bug with that program (including building a
needed <config.h> required by its #includes) by checking out gnulib.git, and
running:

./gnulib-tool --with-tests --create-testdir --dir=path/to/dir getcwd
cd path/to/dir
./configure gl_cv_func_getcwd_path_max=yes
make check

Omit the gl_cv_func_getcwd_path_max assignment during ./configure to let gnulib
detect the limitation and use its fallback wrapper around glibc's getcwd.

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[Bug libc/12713] coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[eblake at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12713

--- Comment #2 from Eric Blake <eblake at redhat dot com> 2011-04-28 19:01:08 UTC ---
Additionally, if the Linux kernel would ever properly support
open(dir,O_SEARCH), then gnulib's getcwd() wrapper would work in even more
cases.

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[Bug libc/12713] coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[ppluzhnikov at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12713

Paul Pluzhnikov <ppluzhnikov at google dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppluzhnikov at google dot
                   |                            |com

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[Bug libc/12713] coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12713

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Ulrich Drepper <drepper.fsp at gmail dot com> 2011-05-08 18:54:10 UTC ---
I've updated git.

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[Bug libc/12713] coreutils-8.12 "make check" thinks glibc-2.13's "getcwd()" is "buggy"

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=12713

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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