Topic: HOW-TO: template-custom a new script.

[Hasan Muhammad]

Problem:
--You need to add a new script (versus modifying an existing one), and
--You want put do it within /etc/e-smith/templates-custom so it will be documented as a change to the base installation (as a script not yet part of a rpm).

Solution:
--put the script (either shell script or perl script) inside the following code snippet, between the lines containing EOF_SCRIPT

{                                       # DO NOT CHANGE THESE First Two  LINES
$OUT=<<'EOF_SCRIPT';                    # DO NOT CHANGE THESE First Two  LINES

EOF_SCRIPT
$OUT =~ s/(.+)\n$/$1/s;                 # DO NOT CHANGE THESE Last Four  LINES
system("echo \" chmod 554 $ARGV[0] \" | at now + 1 minutes ");
}


EXAMPLE: Add a script to perform a weekly file system check on an umounted drive/partition

1) cd /etc/e-smith/templates-custom/etc/cron.weekly

2) create a new file named fsck-for-dev-sda1, containing the following...

{                                       # DO NOT CHANGE THESE First Two  LINES
$OUT=<<'EOF_SCRIPT';                    # DO NOT CHANGE THESE First Two  LINES
#!/bin/sh

#       fdisk /dev/sda                  # run-once: here now as documentation
#               and create new partition
#       mkfs -t ext3 /dev/sda1          # run-once: here now as documentation
#       tune2fs -c 336 /dev/sda1        # run-once: here now as documentation
#       mkdir /mnt/sda                  # run-once: here now as documentation
#       vi /etc/fstab                   # run-once: here now as documentation
#               and add following line
#/dev/sda1              /mnt/sda                ext3    defaults        1 2
#       mkdir /var/log/fsck             # run-once: here now as documentation

#       if drive is already mounted, mail error message and exit
#           NOTE: the following is contained all on a single line
        { mount /mnt/sda 2> /var/log/fsck/dev-sda1 && umount /mnt/sda ;} || { cat /var/log/fsck/dev-sda1 | /var/qmail/bin/mailsubj 'FSCK skipped for /dev/sda1 because drive was busy ' admin && exit 1 ; }
#       do fsck, log the output and mail the output if exit status is non-zero
#           NOTE: the following is contained all on a single line
        fsck -a /dev/sda1 > /var/log/fsck/dev-sda1 || cat /var/log/fsck/dev-sda1 | /var/qmail/bin/mailsubj 'FSCK for /dev/sda1 had non-zero exit status' admin
        exit 0

EOF_SCRIPT
$OUT =~ s/(.+)\n$/$1/s;                 # DO NOT CHANGE THESE Last Four  LINES
system("echo \" chmod 554 $ARGV[0] \" | at now + 1 minutes ");
}

3) Expand the script...
/sbin/e-smith/expand-template /etc/cron.weekly/fsck-for-dev-sda1

4) wait one minute after the script is expanded, so that its permissions will allow execution

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