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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LEARN ABOUT DEBIAN

rdiff

rdiff(1)						      General Commands Manual							  rdiff(1)

NAME

       rdiff - compute and apply signature-based file differences

SYNOPSYS

       rdiff [options] signature old-file signature-file

       rdiff [options] delta signature-file new-file delta-file

       rdiff [options] patch basis-file delta-file new-file

USAGE

       You  can  use  rdiff  to  update  files, much like rsync does.  However, unlike rsync, rdiff puts you in control.  There are three steps to
       updating a file: signature, delta, and patch.

DESCRIPTION

       In every case where a filename must be specified, - may be used instead to mean either standard input or standard  output  as  appropriate.
       Be aware that if you do this, you'll need to terminate your options with -- or rdiff will think you are passing it an empty option.

RETURN VALUE

       0  for successful completion, 1 for environmental problems (file not found, invalid options, IO error, etc), 2 for a corrupt file and 3 for
       an internal error or unhandled situation in librsync or rdiff.

SEE ALSO

       librsync(3)

AUTHOR

       Martin Pool <mbp@samba.org>

       The original rsync algorithm was discovered by Andrew Tridgell.

       rdiff development has been supported by Linuxcare, Inc and VA Linux Systems.

							   $Date: 2002/01/25 21:25:34 $ 						  rdiff(1)