Note the phrase startup behaviour in the paragraph - bash still supports bashisms in its scripts when invoked as sh (after all, that's where the entire historical problem with them comes from) <div class="gmail_quote"> On Mon, Jun 13, 2011 at 4:56 PM, Grail Dane <<a href="mailto:grail69@hotmail.com">grail69@hotmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div> Hi James<div style="font-family:Tahoma;font-size:10pt"> </div><div style="font-family:Tahoma;font-size:10pt">Thanks very much for the reply. As you can probably guess the typo is in the email but not in</div> <div style="font-family:Tahoma;font-size:10pt">the actual script. I did further testing and as per the bash install instructions:</div><div style="font-family:Tahoma;font-size:10pt"> </div><div style="font-family:Tahoma;font-size:10pt"> <table border="0" style="width:auto;margin-right:1em;margin-bottom:0px;margin-left:1em"><tbody><tr> <td style="vertical-align:top">sh </td><td style="vertical-align:top">A symlink to the bash program; when invoked as sh, bash tries to mimic the startup behavior of historical versions of sh as closely as possible, while conforming to the POSIX standard as well </td></tr></tbody></table> </div><div style="font-family:Tahoma;font-size:10pt">This would indicate that it is a bash builtin feature to use only POSIX compliant options.</div> <div style="font-family:Tahoma;font-size:10pt">So from the Cookbook you may need to edit the following from the section you pointed me to:</div><div style="font-family:Tahoma;font-size:10pt"> </div><div style="font-family:Tahoma;font-size:10pt"> If you wish to change this, you can either make <tt>/bin/sh</tt> a symbolic link to your chosen shell</div> <div> </div><div>As this does not work as expected in this case and it may be similar for other shells to.</div> <div> </div><div>I will try the workaround of adding it as the default shell in the build and let you know how it goes :) <div style="font-family:Tahoma;font-size:10pt"> </div> </div><div>Cheers</div><div>grail</div><div> </div><div>> Date: Fri, 10 Jun 2011 11:22:12 +0100 > From: <a href="mailto:james.hunt@ubuntu.com" target="_blank">james.hunt@ubuntu.com</a><div><div></div><div class="h5"> > To: <a href="mailto:grail69@hotmail.com" target="_blank">grail69@hotmail.com</a> > CC: <a href="mailto:upstart-devel@lists.ubuntu.com" target="_blank">upstart-devel@lists.ubuntu.com</a> > Subject: Re: Process substitution into loop > > Hi Grail, > > On 10/06/11 05:46, Grail Dane wrote: > > > > > >> Date: Thu, 9 Jun 2011 21:05:45 -0700 > >> From: <a href="mailto:steve.langasek@ubuntu.com" target="_blank">steve.langasek@ubuntu.com</a> > >> To: <a href="mailto:grail69@hotmail.com" target="_blank">grail69@hotmail.com</a> > >> CC: <a href="mailto:upstart-devel@lists.ubuntu.com" target="_blank">upstart-devel@lists.ubuntu.com</a> > >> Subject: Re: Process substitution into loop > >> > >> On Fri, Jun 10, 2011 at 03:53:15AM +0000, Grail Dane wrote: > >> > Just wondering, as I can't find by googling, if it is at all possible to > >> > do a processsubstitution into a while loop within an upstart script? > >> > >> > Example: > >> > while read -r DEVICE > >> > do > >> > ip link set dev $DEVICE up > >> > done< <(ip link | awk '/^[0-9]/ && !/UP/ && gsub(/:/,""){print $2}) > You have an error in your script: it is missing the closing tick (see below). > > >> > >> > When issuing the start command on the script I get: > >> > /proc/self/fd/10: line 6: syntax error near unexpected '<'init: > >> > network-interfaces main process (1367) terminated with status 2start: Job > >> > failed to start Would appreciated if someone would identify if i have done > >> > something wrong or if this not a supported feature? > >> > >> The <() syntax is not part of the POSIX standard, it's a bash extension. > >> Upstart uses /bin/sh to interpret scripts, as is customary; chances are > >> you're running on a system where /bin/sh is not bash, and as a result this > > > > Actually /bin/sh is a symbolic link to bash on my system. Is there anyway to have bash as the > > shell used? > > script > /bin/bash <<EOT > while read -r DEVICE > do > echo "DEBUG: ip link set dev $DEVICE up" > /tmp/grail.log > done < <(ip link | awk '/^[0-9]/ && !/UP/ && gsub(/:/,""){print $2}') > EOT > end script > > Also, just for you :)... > > <a href="http://upstart.ubuntu.com/cookbook/#changing-the-default-shell" target="_blank">http://upstart.ubuntu.com/cookbook/#changing-the-default-shell</a> > > Regards, > > James. > > > > >> syntax is not supported. > >> > >> A supported syntax would be: > >> > >> ip link | awk '/^[0-9]/ && !/UP/ && gsub(/:/,""){print $2}' | > >> while read -r DEVICE > >> do > >> ip link set dev $DEVICE up > >> done > >> > >> -- > >> Steve Langasek Give me a lever long enough and a Free OS > >> Debian Developer to set it on, and I can move the world. > >> Ubuntu Developer <a href="http://www.debian.org/" target="_blank">http://www.debian.org/</a> > >> <a href="mailto:slangasek@ubuntu.com" target="_blank">slangasek@ubuntu.com</a> <a href="mailto:vorlon@debian.org" target="_blank">vorlon@debian.org</a> > > > </div></div></div> </div> -- upstart-devel mailing list <a href="mailto:upstart-devel@lists.ubuntu.com">upstart-devel@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/upstart-devel" target="_blank">https://lists.ubuntu.com/mailman/listinfo/upstart-devel</a> </blockquote></div>