RE: ssh breaks while loop
FWIW, I see the same behavior, but not just Cygwin, but also on a Red Hat Linux installation, so I guess it's more of a bash/ssh issue than one with Cygwin. A workaround that works for me is the following: for host in $(hostlist) do ssh $host ls -al .profile done -Original Message- From: CB [mailto:[EMAIL PROTECTED] Sent: Friday, August 04, 2006 10:01 AM To: cygwin@cygwin.com Subject: ssh breaks while loop If file hostlist contains: hosta hostb hostc then execute this shell script: while read host do ssh $host ls -al .profile done hostlist the while loop executes one time and quits. But, while read host do echo $host done hostlist executes 3 times. Am I missing something or is this a bug? -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: ssh breaks while loop
On Mon, 14 Aug 2006 09:54:21 -0400, Kenneth Nellis wrote: FWIW, I see the same behavior, but not just Cygwin, but also on a Red Hat Linux installation, so I guess it's more of a bash/ssh issue than one with Cygwin. There are 2 issues here, One is ssh's, the other is with sh/bash. None is Cygwin specific, i.e. it is OFFTOPIC. On Friday, August 04, 2006 10:01 AM, BC wrote: BC If file hostlist contains: BC hosta BC hostb BC hostc BC BC then execute this shell script: BC while read host BC do BC ssh $host ls -al .profile BC done hostlist BC BC the while loop executes one time and quits. The problem is that `ssh' read stdin. To overcome this change it to: ssh $host ls -al .profile /dev/null A second possible problem is that ssh may exit with error, the solution is to add set +e (in separate line) before the ssh line. Ehud. -- Ehud Karni Tel: +972-3-7966-561 /\ Mivtach - Simon Fax: +972-3-7966-667 \ / ASCII Ribbon Campaign Insurance agencies (USA) voice mail and X Against HTML Mail http://www.mvs.co.il FAX: 1-815-5509341 / \ GnuPG: 98EA398D http://www.keyserver.net/Better Safe Than Sorry -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: ssh breaks while loop
CB wrote: If file hostlist contains: hosta hostb hostc then execute this shell script: while read host do ssh $host ls -al .profile done hostlist the while loop executes one time and quits. But, while read host do echo $host done hostlist executes 3 times. Am I missing something or is this a bug? This isn't Cygwin-specific so it's off-topic for this list. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: ssh breaks while loop
On Fri, 4 Aug 2006, CB wrote: If file hostlist contains: hosta hostb hostc then execute this shell script: while read host do ssh $host ls -al .profile done hostlist the while loop executes one time and quits. But, while read host do echo $host done hostlist executes 3 times. Am I missing something or is this a bug? WJFFM. There are many things that can be different in our environments. Are you sure you're reading the hosts separately? What's IFS set to? Try prepending something to $host in your second loop, e.g., echo Host: $host and see if you get them echoed one host at a time, or all three at once. You may also insert echo before the ssh in the first loop and see if you get 3 echoes. Also, is set -e in effect? If it is, the loop may be quitting if the first ssh returns false. Igor -- http://cs.nyu.edu/~pechtcha/ |\ _,,,---,,_[EMAIL PROTECTED] | [EMAIL PROTECTED] ZZZzz /,`.-'`'-. ;-;;,_Igor Peshansky, Ph.D. (name changed!) |,4- ) )-,_. ,\ ( `'-' old name: Igor Pechtchanski '---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow! Las! je suis sot... -Mais non, tu ne l'es pas, puisque tu t'en rends compte. But no -- you are no fool; you call yourself a fool, there's proof enough in that! -- Rostand, Cyrano de Bergerac -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
