02-27-2015
Re run the script from the point of failure
Hello
I have a shell script with multiple sections in it. Like, verify pre-requisites, ch co version, stop services , install product , post migration steps, start services, send status email.
If the script fails at certain step, (like after product installation) it can't be re-run since the install should not be run before cleanup. I have logicin the script to halt the script if this product is already installed ,but I would like is to track successful completion of each step, and if it fails at any point, re-running the script should pick it up from failed step.
For example, I have 10 sections in the script. For some reason, script failed at 6th step. After I correct the issue that caused the failure, re-running the script should run from step 6 and not from step 1.
I have seen someone do this by writing the successful completion to a text file and then checking that text file when re-running it , but not sure how this can be done.
Thoughts and help please
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LEARN ABOUT ULTRIX
service
SERVICE(8) System Manager's Manual SERVICE(8)
NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script or systemd unit in as predictable an environment as possible, removing most environment variables and
with the current working directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT, or the name of a systemd unit. The existence of a
systemd unit of the same name as a script in /etc/init.d will cause the unit to take precedence over the init.d script. The supported val-
ues of COMMAND depend on the invoked script. service passes COMMAND and OPTIONS to the init script unmodified. For systemd units, start,
stop, status, and reload are passed through to their systemctl/initctl equivalents.
All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice,
first with the stop command, then with the start command.
service --status-all runs all init scripts, in alphabetical order, with the status command. The status is [ + ] for running services, [ - ]
for stopped services and [ ? ] for services without a status command. This option only calls status for sysvinit jobs.
EXIT CODES
service calls the init script and returns the status returned by it.
FILES
/etc/init.d
The directory containing System V init scripts.
/{lib,run,etc}/systemd/system
The directories containing systemd units.
ENVIRONMENT
LANG, LANGUAGE, LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES, LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEA-
SUREMENT, LC_IDENTIFICATION, LC_ALL, TERM, PATH
The only environment variables passed to the init scripts.
SEE ALSO
/etc/init.d/skeleton
update-rc.d(8)
init(8)
invoke-rc.d(8)
systemctl(1)
AUTHOR
Miloslav Trmac <mitr@redhat.com>, Petter Reinholdtsen <pere@hungry.com>
Licence: GNU Public Licence v2 (GPLv2)
COPYRIGHT
2006 Red Hat, Inc., Petter Reinholdtsen <pere@hungry.com>
Jan 206 SERVICE(8)