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Top Forums UNIX for Dummies Questions & Answers change target of a symbolic link Post 302239401 by fimblo on Tuesday 23rd of September 2008 02:43:22 PM
Old 09-23-2008
Very interested to hear fpmurphy's explanation on how to change target of symlink without deleting the symlink first.

I normally delete the symlink and re-create it on one line, minimizing the time the link does not exist:

rm mysymlink ; ln -s mytargetfile mysymlink

I suppose you could write a little hack which does it in one go, but I've never heard of one which is included in standard POSIX systems...
 

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OCF_HEARTBEAT_SYMLIN(7) 					OCF resource agents					   OCF_HEARTBEAT_SYMLIN(7)

NAME
ocf_heartbeat_symlink - Manages a symbolic link SYNOPSIS
symlink [start | stop | monitor | meta-data | validate-all] DESCRIPTION
This resource agent that manages a symbolic link (symlink). It is primarily intended to manage configuration files which should be enabled or disabled based on where the resource is running, such as cron job definitions and the like. SUPPORTED PARAMETERS
link Full path of the symbolic link to be managed. This must obviously be in a filesystem that supports symbolic links. (required, string, no default) target Full path to the link target (the file or directory which the symlink points to). (required, string, no default) backup_suffix A suffix to append to any files that the resource agent moves out of the way because they clash with "link". If this is unset (the default), then the resource agent will simply refuse to create a symlink if it clashes with an existing file. (optional, string, no default) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 15. stop Stops the resource. Suggested minimum timeout: 15. monitor Performs a detailed status check. Suggested minimum timeout: 15. Suggested interval: 60. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 10. EXAMPLE
The following is an example configuration for a symlink resource using the crm(8) shell: primitive p_symlink ocf:heartbeat:symlink params link=string target=string op monitor depth="0" timeout="15" interval="60" SEE ALSO
http://www.linux-ha.org/wiki/symlink_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents UNKNOWN 06/09/2014 OCF_HEARTBEAT_SYMLIN(7)
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