Script to run command one by one Post: 302793739

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Top Forums Shell Programming and Scripting Script to run command one by one Post 302793739 by Don Cragun on Saturday 13th of April 2013 11:16:55 AM

04-13-2013

Registered User

The script that you suggested will overwrite the output of all previously executed scripts with the output of the last script to run. The wait commands in your script don't do anything. (You didn't start the cmd* scripts asynchronously and it wouldn't make any difference if you did.) If you have some long running cmd* scripts, run this shell script in the background; not the jobs started by the script. You might want to try something like:

Code:

#!/bin/bash
i=1
while [ -f cmd$i ]
do      sh cmd$i > cmd$i_stdout.txt 2> cmd$i_stderr.txt
        i=$((i + 1))
done

Note that you specified that this is a bash script, but you're executing the cmd* scripts using sh (rather than bash). If the scripts to be run are executable scripts, you could omit the "sh" in red in the above script and let a #! line in each script specify the shell to be used for any script that doesn't want to use the system's default shell. This script will run any number of cmd* scripts as long as their names have consecutive integer values (starting with "1") at the ends of the names.

PS I didn't notice that you had used >> instead of > for later jobs, so you won't be overwriting the output. You may still want to consider the redirection methods shown above to separate stdout and stderr for each script into separate files. I also skipped the echoes you had showing the progression of scripts being executed. If you want them, I assume you know where to add them. (If not; let me know.)

Last edited by Don Cragun; 04-13-2013 at 12:26 PM..

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LEARN ABOUT DEBIAN

rancid-run

rancid-run(1)						      General Commands Manual						     rancid-run(1)

NAME

       rancid-run - run rancid for each of the groups

SYNOPSIS

       rancid-run [-V] [-f rancid.conf] [-f rancid.conf] [-m mail_rcpt] [-r device_name] [group [group ...]]

DESCRIPTION

       rancid-run is a sh(1) script to run rancid(1) for a set of rancid group(s).

       rancid-run reads rancid.conf(5) to configure itself, then uses control_rancid(1) to run rancid(1) for each rancid group.  The set of rancid
       groups can either be provided as command-line arguments or via the LIST_OF_GROUPS variable in rancid.conf(5),  if  the  group  argument	is
       omitted.

       A  lock	file  is  maintained  per-group  to  prevent  simultaneous  runs  for a given group by rancid-run(1).  The lock file will be named
       .<group>.run.lock and will be located in /var/lib/rancid.

       A log file is produced under $LOGDIR/logs for each rancid group processed.  The file name will be <group>.YYYYMMDD.HHMMSS (year month day .
       hour minute second).

       rancid-run is normally used to run rancid from cron(8).	For example:

		 0 * * * *	/usr/local/rancid/bin/rancid-run

       The command-line options are as follows:

       -V     Prints package name and version strings.

       -f rancid.conf
	      Specify an alternate configuration file.

       -m mail_rcpt
	      Specify  the  recipient  of  diff  mail,	which  is  normally  rancid-<group>.  The argument may be a single address, multiple comma
	      separated addresses, or -m may be specified multiple times.

       -r device_name
	      Run rancid for a single device, device_name.  device_name should be name, as it appears in a group's router.db.  The device must	be
	      marked  "up".   If  a  group  is	not  specified	on the command-line, rancid will be run against any group in which the device_name
	      appears.

	      The -r option alters the subject line of the diff mail.  It will begin with <group name>/<device name> rather than  just	the  group
	      name alone.

ENVIRONMENT

       rancid-run utilizes the following environment variables from rancid.conf(5).

       BASEDIR
	      Location of group directories, etc.  This is set to the "localstatedir" by the configure script at installation time.

       LIST_OF_GROUPS
	      List of rancid groups to collect.

       PATH   Search path for utilities.

       TMPDIR Directory to hold temporary files.

ERRORS

       If  rancid  fails  to  run or collect a device's configuration, the particular group's log file (mentioned above) should be consulted.  Any
       errors produced by the revision control system (CVS or Subversion) or any of the rancid scripts should be included there, whether they be a
       botched	cvs  tree,  login  authentication failure, rancid configuration error, etc.  If the log file produces no clues, the next debugging
       step should be run the commands manually.  For example, can the user who runs rancid login to the device with 'clogin hostname', and so on.

FILES

       $BASEDIR/etc/rancid.conf
	      rancid-run configuration file.

SEE ALSO

       control_rancid(1), rancid.conf(5), router.db(5)

								  5 October 2006						     rancid-run(1)

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