Hi Tim, I've been trying this procedure out today and it seems to work just fine, at least on a Mac, even though the man page for ping says it returns zero if successful, not empty and the procedure is treating any non-empty result as failure. Not sure why taht is. Pete lcSQL Software <http://www.lcsql.com>
On Sun, Apr 29, 2012 at 11:02 AM, Tim Jones <tolis...@me.com> wrote: > Pete, > > It's a good idea to always check the error code returned from a shell > command. The actual text may various from one OS update to another, so > depending of the text returned can be a quick way to introduce an odd "bug" > that works on one platform, but not on another. The man page will describe > the returned values. If they are the text values (like ENOSPC, or EINVAL), > you can look those up in the errno.h file (usually in > /usr/include/sys/errno.h). > > Since ping returns data on both a failure and a success, checking for an > empty tResult would always result in a "failure" as written. > > Tim > > On Apr 29, 2012, at 10:49 AM, Peter Haworth wrote: > > > Hi Phil, > > Double checking on the code below in your script. The man page for ping > in > > OS X and Linux say that ping has an exit code of zero if no errors are > > encountered. Should the test on tResult be for zero or have you found > that > > empty works too? > > > > Thanks, > > Pete > > lcSQL Software <http://www.lcsql.com> > > > > On Sat, Apr 28, 2012 at 12:30 PM, Phil Davis <rev...@pdslabs.net> wrote: > > > >> -- check for connection failure > >> if tResult <> empty > >> then return false -- failed > >> else -- connected, but how well? > >> > > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
