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Date:      Fri, 14 Oct 2005 07:19:15 -0700
From:      Drew Tomlinson <drew@mykitchentable.net>
To:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Cron Runs Script Twice - Once With Error and Once Without?
Message-ID:  <434FBE63.3070905@mykitchentable.net>
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I have a script that runs from cron.  The script mounts an smbfs share 
on another machine, copies some files from it, and then unmounts the 
share.  The script is run from a 4.11 machine.  It's connecting to a 5.4 
box running Samba 3.0.20.

I'm trying to figure out why it runs twice.  Once with an error and once 
successfully.  I get both emails at 0230 although the error email is 
listed first.   The success email is just as I'd expect but I don't 
understand the error.  The script runs without any errors interactively. 
  Here is the contents of the error email:

--- BEGIN ---

#! /bin/sh -v

# Save *.bsr files to this location
backup_dir="/root/bacula_bsr"

# Mount Blacklamb's /usr filesystem.  Exit if error.
/sbin/mount -t smbfs //account@blacklamb/User /blacklamb && 
	echo -e "/blacklamb mounted successfully.\n" || {
	echo -e Unable to mount /blacklamb\. 1>&2
	exit 1
}
smbfs: can't get handle to requester (no /dev/nsmb* device)
Unable to mount /blacklamb.
--- END ---

And here is the contents of the success email:
--- BEGIN ---

#! /bin/sh -v

# Save *.bsr files to this location
backup_dir="/root/bacula_bsr"

# Mount Blacklamb's /usr filesystem.  Exit if error.
/sbin/mount -t smbfs //account@blacklamb/User /blacklamb && 
	echo -e "/blacklamb mounted successfully.\n" || {
	echo -e Unable to mount /blacklamb\. 1>&2
	exit 1
}
/blacklamb mounted successfully.


# Test that $backup_dir exists ([ is actually /bin/test). If it does
# then continue.  Otherwise create $backup_dir.
if [ -e $backup_dir ]; then
	echo -e "$backup_dir exists!\n" 1>&2

else 
	{ mkdir $backup_dir &&
		echo -e "Created ${backup_dir}.\n"
	} || {
		echo -e "Failed to create ${backup_dir}!!!\n";
		exit 1
	}
fi
/root/bacula_bsr exists!


# Move existing files to *.yesterday.
echo -e "Moving files..."
Moving files...
for i in `ls ${backup_dir}/*.bsr`; do
        mv -v "$backup_dir"/`basename $i` "$backup_dir"/`basename $i`\.yesterday
done
/root/bacula_bsr/BackupCatalog.bsr -> /root/bacula_bsr/BackupCatalog.bsr.yesterday
/root/bacula_bsr/bigdaddy.bsr -> /root/bacula_bsr/bigdaddy.bsr.yesterday
/root/bacula_bsr/blacklamb.bsr -> /root/bacula_bsr/blacklamb.bsr.yesterday
/root/bacula_bsr/blacksheep.bsr -> /root/bacula_bsr/blacksheep.bsr.yesterday
/root/bacula_bsr/lillady.bsr -> /root/bacula_bsr/lillady.bsr.yesterday
/root/bacula_bsr/restore.bsr -> /root/bacula_bsr/restore.bsr.yesterday
/root/bacula_bsr/tv.bsr -> /root/bacula_bsr/tv.bsr.yesterday

# Copy files from Blacklamb.
echo -e "\nCopying files..."

Copying files...
for i in `ls /blacklamb/var/db/bacula/*.bsr`; do
	cp -pv "$i" "$backup_dir" || {
		echo -e "Error creating ${backup_dir}/${i}!!!"
	}
done
/blacklamb/var/db/bacula/BackupCatalog.bsr -> /root/bacula_bsr/BackupCatalog.bsr
/blacklamb/var/db/bacula/bigdaddy.bsr -> /root/bacula_bsr/bigdaddy.bsr
/blacklamb/var/db/bacula/blacklamb.bsr -> /root/bacula_bsr/blacklamb.bsr
/blacklamb/var/db/bacula/blacksheep.bsr -> /root/bacula_bsr/blacksheep.bsr
/blacklamb/var/db/bacula/lillady.bsr -> /root/bacula_bsr/lillady.bsr
/blacklamb/var/db/bacula/restore.bsr -> /root/bacula_bsr/restore.bsr
/blacklamb/var/db/bacula/tv.bsr -> /root/bacula_bsr/tv.bsr

# Unmount Blacklamb's filesystem.
/sbin/umount /blacklamb && echo -e "\n/blacklamb unmounted successfully." || {
        echo -e "\nUnable to unmount /blacklamb." 1>&2
        exit 1
}

/blacklamb unmounted successfully.

exit

--- END ---


Here is the relevant crontab:

--- BEGIN ---
# Backup bootstrap files from Blacklamb.
MAILTO="root"
# Run after incrementals at 0230 (everyday except Sunday.)
30 2 * * 1-6 /usr/local/scripts/backup_bootstrap.sh
# Run 2-5th Sundays at 0230 - Differentials
30 2 8-31 * 7 /usr/local/scripts/backup_bootstrap.sh
# Run 1st Sunday at 0930 - Fulls
30 9 1-7 * 7 /usr/local/scripts/backup_bootstrap.sh
--- END ---

Any ideas on what is happening here?

Thanks,

Drew

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