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diff --git a/examples/functions/coshell.README b/examples/functions/coshell.README new file mode 100644 index 0000000..9675cda --- /dev/null +++ b/examples/functions/coshell.README @@ -0,0 +1,53 @@ +Date: Fri, 21 Sep 2001 14:50:29 -0400 +From: "Jason M. Felice" <jfelice@cronosys.com> +To: bash-maintainers@gnu.org, chet@po.cwru.edu +Subject: Bash co-processes functions +Message-ID: <20010921145029.A6093@argo.eraserhead.net> +Mime-Version: 1.0 + +Attached to this message you will find coprocess.bash and coshell.bash. +Here's a brief synopsis of use: + +coprocess open telnet localhost +while coprocess read il ; do + echo "$il" + case "$il" in + *ogin:*) + coprocess print 'user' + ;; + *ord:*) + echo 'pass' |coprocess print --stdin + ;; + *$ *) + coprocess print 'exit' + break + ;; + esac +done +coprocess close + +And here's an example of the coshell function: + +coshell open ssh -l root otherbox +coshell eval hostname +coshell ls -l +if coshell test -d /tmp ; then echo 'otherbox has a /tmp!' ; fi + +coshell sendfile /var/lib/upgrade.rpm /tmp/test.rpm || exit $? +coshell eval rpm -ivh /tmp/test.rpm || exit $? +coshell eval rm -f /tmp/test.rpm || exit $? +coshell close +exit 0 + +There are a few minor issues that I'd like to work out, but it works well +enough for me ;-) The issues are: + +- Shell quoting issue with 'coshell eval' commands - need to somehow + re-quote words. +- Interactive commands hang 'coshell eval', tried redirecting in </dev/null + to executed command, but it caused strange shell exit problems. +- Some way to copy stdin from local coshell eval to remote shell. Probably + logically impossible, but would be wonderfully useful. + +I'm using it for writing scripts to publish websites and other scripts to +co-located servers. |