Email Notifications on Cron Bash Error Only cp mv rsync Post: 302990986

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Top Forums Shell Programming and Scripting Email Notifications on Cron Bash Error Only cp mv rsync Post 302990986 by jim mcnamara on Saturday 4th of February 2017 10:33:47 AM

02-04-2017

Registered User

All of those commands return non-zero on error.

See rsync(1) - Linux manual page near the bottom for error return values.

rsync has a huge range of uses and many, many options. mv and cp work the same, i.e., return non-zero on error. We cannot provide guidance on setting up a script, but generally you can set up an error checking function in bash like this

Code:

#!/bin/bash
# bash function to check for errors - name capitalized to stand out in code
# usage:
# called  right after a cp, mv or rsync command, 
#   LINENO is an internal bash variable,  $? is the exit status of the command.
#   
#   ERR_CHK $LINENO $? is how to call this
ERR_CHK()  
{
    if [ $2 -gt 0 ]; then
       echo "Script name failed at line $1" | mailx -s 'cron job failure' me@myemailaddress.com
       exit 1
    fi    
}

# later on in the script call it
cp somefile anotherfile
ERR_CHK $LINENO $?

mv something somewhere 
ERR_CHK $LINENO $?

rsync [ a huge bunch of options and parameters ]
ERR_CHK $LINENO $?

Have fun.

jim mcnamara

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dtc-xen_migrate

dtc-xen_migrate(8)					      System Manager's Manual						dtc-xen_migrate(8)

NAME

       dtc-xen_migrate - migrate a VPS to another Xen server

SYNOPSIS

       LOCAL_VPS_ID DESTINATION_HOSTNAME [ DEST_VPS_ID ]

DESCRIPTION

       dtc-xen_migrate	This  shell  script  is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server. Note
       that you need rsync in both the source and the destination dom0.

       This script is used to move the content of a Xen virtual machine (VM) managed with dtc-xen to another Xen server of the same type.  The	VM
       destination will first be prepared, then the local VM will be shut down, then it's content will be transfered over using rsync.

       Note that this is NOT a live migration, and down time of approximatively the time needed for the rsync will occure.

PARAMETERS

       LOCAL_VPS_ID The DTC-Xen id of the VM, from 00 to 99.

       DESTINATION_HOSTNAME Destination Xen server hostname to migrate to.

       DEST_VPS_ID Destination DTC-Xen id of the VM, from 00 to 99.

EXAMPLE

       dtc-xen_migrate 19 alpha.example.com 21

       This will migrate the content of xen19 on the local machine to the destination server alpha.example.com using xen21 as VM name.

SEE ALSO

       dtc_reinstall_os(8), dtc_kill_vps_disk(8)

																dtc-xen_migrate(8)