[Fedora-livecd-list] Failed to create LiveCD

[Adam Dutko]

THIS IS VERY BASIC AND DOES NOT COVER ALL USE CASES.  I will attempt to
patch this with better logic tomorrow.  I'm trying to determine if it's best
to use 'du' (which can take a while, and is subject to permissions
issues...) or maybe 'sar' (which might not be universally installed...).
Any guidance on other potential tools and/or approaches is appreciated.

#!/usr/bin/python -tt

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

# A very basic (and potential partial patch to livecd-creator)
# by Adam M. Dutko - (dutko.adam at gmail.com)

# This code is valid for systems with an actual /var partition.
# In cases where we only have a root (/), /boot and swap on the system
# it will fail.  I need to write a patch for that case and append to
# this code.  Will try to do this week.
#
import os
import string

# Get a print out of disk space
the_disk = os.popen("df -P")

# We have six columns when using the 'Posix Switch' (-P).
#   partition_details[0] = Filesystem
#   partition_details[1] = 1024-blocks
#   partition_details[2] = Used
#   partition_details[3] = Available
#   partition_details[4] = Capacity
#   partition_details[5] = Mounted on

for the_partitions in the_disk.readlines():
    # Cleanup b/c internal pointers are messy for some reason
    check_size = ""
    check_var = ''

    partition_details = the_partitions.split()

    check_size = partition_details[3].strip()
    check_var = partition_details[5].strip()
    if check_var == '/var' and check_size < "3000000":
            print "You do not have enough free space to proceed with the
installation. " \
                  " Please allocate at least 3 gigabytes of space to /var so
the " \
                  "livecd-creator tool can continue with the build under
/var/tmp/livecd-creator."
            exit


-Adam
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