[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] libxl: Be more careful with error handling in libxl__dm_runas_helper()

On 12/01/2015 09:38 AM, Ian Campbell wrote:
On Mon, 2015-11-30 at 13:24 -0500, Boris Ostrovsky wrote:
      root@orochi-c> cat /etc/redhat-release
      Fedora release 20 (Heisenbug)
      root@orochi-c> ./a.out foobar
      s = 2 errno = 2 result = (nil)
      getpwnam_r: No such file or directory

which does look like a bug in F20 since the code above is taken from man
pages' EXAMPLE and doesn't look like it works as intended (which was to
produce "Not found" string)
https://bugzilla.redhat.com/show_bug.cgi?id=988068 seems related (although
is blaming "sssd" rather than glibc it seems).

This too:


They claim that glibc v2.20 fails (i.e. returns non-zero/ENOENT) but in my case on fedora 21 with 2.20-8 I get 0. My "failing" fedora 20 uses 2.18.

I don't know whether it's really a bug in glibc since Linux man pages do allow ENOENT (and some other codes) to indicate absence of entry. (But then if this is not a bug in glibc then there is a bug in man pages' example code).

In any case, I think we need to account for this in libxl.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.