[libvirt] [PATCH 2/2] maint: prohibit access(,X_OK)

[Eric Blake]

On 03/18/2011 02:46 PM, Eric Blake wrote:
> This simplifies several callers that were repeating checks already
> guaranteed by util.c, and makes other callers more robust to now
> reject directories.  remote_driver.c was over-strict - access(,X_OK)
> is not strictly needed to execute a file (although its unusual to see
> a file with X_OK but not R_OK).

I meant to say that access(,R_OK) is not strictly necessary.  But I
stand a bit corrected - binaries can be executed without read
permission, but scripts require both execute permission (to do the #!
search) and read permission (for the interpreter to process the script).

Maybe virFileIsExecutable should add a check for readability?

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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