[OE-core] [PATCH 1/1] sanity.bbclass: check TMPDIR is not too long

[Robert Yang]

I've rebased the code to the up-to-date master branch, and pushed to:

   git://git.pokylinux.org/poky-contrib robert/tmpdir
   http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=robert/tmpdir

// Robert

On 05/08/2012 10:50 AM, Robert Yang wrote:
> When the length of TMPDIR is longer than a threshold, there would be an
> "Argument list too long" error when building gcc-cross, this is the
> error from the exec(), the maximum length of argument is defined in
> /usr/include/linux/limits.h:
>
>    #define ARG_MAX       131072    /* # bytes of args + environ for exec() */
>
> It's hard to determine the threshold of the TMPDIR, here is the
> experimental value:
> len(TMPDIR) = 182	Success
> len(TMPDIR) = 192	Failed
>
> So set the maximum length of TMPDIR to 180 seems proper.
>
> [YOCTO #2434]
>
> Signed-off-by: Robert Yang<liezhi.yang at windriver.com>
> ---
>   meta/classes/sanity.bbclass |   11 +++++++++++
>   1 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
> index 687ddeb..6aaac1e 100644
> --- a/meta/classes/sanity.bbclass
> +++ b/meta/classes/sanity.bbclass
> @@ -30,6 +30,7 @@ def check_sanity_sstate_dir_change(sstate_dir, data):
>       testmsg = ""
>       if sstate_dir != "":
>           testmsg = check_create_long_filename(sstate_dir, "SSTATE_DIR")
> +
>       return testmsg
>
>   def check_sanity_tmpdir_change(tmpdir, data):
> @@ -83,6 +84,12 @@ def check_create_long_filename(filepath, pathname):
>               return "Failed to create a file in %s: %s" % (pathname, strerror)
>       return ""
>
> +def check_long_path(filepath, pathname):
> +    # The 180 is just an empirical value
> +    if len(filepath)>  180:
> +	return "The path length of %s is too long, this would cause the \"Argument list too long\" error, please use a shorter path.\n" % pathname
> +    return ""
> +
>   def check_connectivity(d):
>       # URI's to check can be set in the CONNECTIVITY_CHECK_URIS variable
>       # using the same syntax as for SRC_URI. If the variable is not set
> @@ -353,6 +360,10 @@ def check_sanity(e):
>       tmpdir = data.getVar('TMPDIR', e.data, True)
>       sstate_dir = data.getVar('SSTATE_DIR', e.data, True)
>
> +    # Check whether the length of TMPDIR is too long to cause the
> +    # argument list too long error
> +    messages = messages + check_long_path(tmpdir, "TMPDIR")
> +
>       # Check saved sanity info
>       last_sanity_version = 0
>       last_tmpdir = ""