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Full Discussion: Help with a loop
Top Forums Shell Programming and Scripting Help with a loop Post 302901969 by sudo on Friday 16th of May 2014 09:06:54 PM
Old 05-16-2014
Help with a loop

I have 2 servers syncing some directories with an rsync script. They are in different countries. The rsync script is executed on Server#1. I am using 'fswatch' to execute the script automatically, when the directory is modified.

Here is where I am looking for help:

After 'fswatch' see's a directory change, it triggers my rsync script on Server#1. I need the rsync script to look at the Server#2 and check a file which contains the string "open" or "closed". If it says "closed", I want the rsync to script to execute. If it says "open", I don't want the rsync script to execute, but rather wait x seconds and check the file again (the file will eventually change to "closed", allowing the script to run).

Any insight on structuring this is greatly appreciated, I haven't figured out how to setup the loop of 'check file/don't execute/wait/check again' logic.

---------- Post updated at 08:06 PM ---------- Previous update was at 06:44 PM ----------

I think I found the logic. Can somebody tell me how to get this to time out after say 100 tries?

Code:
STATUSFILE=/Users/patrick/Desktop/temp/remoteserverstatus
until grep -q closed "$STATUSFILE"; do
echo ‘waiting for sever to finish’; sleep 3
done
echo ‘running script’


Last edited by sudo; 05-16-2014 at 09:25 PM.. Reason: Removing code
 

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slack.conf(5)							File Formats Manual						     slack.conf(5)

NAME
slack.conf - configuration file for slack DESCRIPTION
The file /etc/slack.conf contains configuration information for slack(8) and its backends. It should contain one keyword-value pair per line, separated by an '=' sign. Keywords must consist solely of capital letters and underscores. Values may take any appropriate format, but must not begin with a space. Comments start with '#', and all text from the '#' to the end of a line is ignored. Trailing whitespace on lines is ignored. Empty lines or lines consisting of only whitespace and comments are ignored. Valid keywords are: SOURCE The master source for slack roles. It can be in one of four forms: o /path/to/dir Use a local directory. o somehost:/path/to/dir Use given directory on a remote host via rsync over SSH. o rsync://somehost/module Use module on a remote rsyncd server (directly over the network). o somehost::module Use the rsync daemon protocol over SSH to the given host. See "USING RSYNC-DAEMON FEATURES VIA A REMOTE-SHELL CONNECTION" in rsync(1) All forms of SOURCE are passed directly to rsync, so you can do things like add "user@" before the host on any remote forms. For more about what rsync can do, see its manual page, of course. For the last form, however, we do a little magic. rsync treats the last two forms equivalently, so we overload the last form by automatically passing "-e ssh" to rsync when we see it. This hack lets us tell slack to use this nice feature of rsync just using the SOURCE config option. ROOT The root filesystem into which to install slack roles. Usually '/'. ROLE_LIST The location of the role list, which lists the roles to be installed by default on each host. This can be a path relative to the source, or can be an entirely separate location if it starts with a slash or a hostname (option- ally preceeded by user@). CACHE A local cache directory, used as a local mirror of the SOURCE. STAGE A local staging directory, used as an intermediate stage when installing files. BACKUP_DIR A directory in which to keep dated backups for rollbacks. EXAMPLE
A typical file might look like this: # slack.conf configuration file SOURCE=slack-master:/slack # source is on a remote # host named "slack-master" ROLE_LIST=slack-master:/roles.conf ROOT=/ CACHE=/var/cache/slack STAGE=/var/lib/slack/stage BACKUP_DIR=/var/lib/slack/backups FILES
/etc/slack.conf SEE ALSO
slack(8), rsync(1) File formats 2005-05-23 slack.conf(5)
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