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#!/usr/bin/python
#
# mk-rescueimage.i386 - builds a rescue image from an existing tree
# which can be converted into a isolinux bootable
# iso and used as a sysadmin rescue image.
#
#
# Usage: mk-rescueimage.i386 <src-tree> <dest-dir> <productname>
#
# the rescue image will be created as <dest-dir>/i386-rescueimage
#
import os
import sys
import string
def usage():
print "usage: mk-rescueimage.i386 <toplevel> <dest-dir> <productname> [<productpath>]"
sys.exit(0)
if len(sys.argv) < 4:
usage()
sys.exit(1)
if not os.access("%s/i386" % (sys.argv[2],), os.F_OK):
print "ERROR - Destination directory %s does not contain an i386 directory!" % (sys.argv[2],)
sys.exit(1)
srcdir = sys.argv[1]
destdir = sys.argv[2]+"/i386-rescueimage"
productname = sys.argv[3]
if len(sys.argv) > 4:
productpath = sys.argv[4]
else:
productpath = "RedHat"
# clean and create destination directory
os.system("rm -rf %s" % (destdir,))
os.system("mkdir %s" % (destdir,))
# copy documentation
for pat in ["*eula*", "*EULA*", "README*", "RELEASE*", "GPL", "RPM-*"]:
os.system("cp -p %s/%s %s/ 2>/dev/null" % (srcdir, pat, destdir))
# cp isolinux boot image
os.system("cp -a %s/isolinux %s/" % (srcdir, destdir))
# cp stage image
os.system("mkdir -p %s/%s/base" % (destdir,productpath))
os.system("cp -a %s/%s/base/stage2.img %s/%s/base" % (srcdir, productpath, destdir, productpath))
# munge syslinux config to have a default of rescue mode
cfgfile = open("%s/isolinux/isolinux.cfg" % (destdir,), "r")
cfglines = cfgfile.readlines()
cfgfile.close()
# backup old one
os.system("cp %s/isolinux/isolinux.cfg %s/isolinux/isolinux.cfg.backup" % (destdir,destdir))
cfgfile = open("%s/isolinux/isolinux.cfg" % (destdir,), "w+")
fndit = 0
indefault = 0
defaultimg = None
for l in cfglines:
if string.find(l, "default ") != -1:
defaultimg = string.strip(string.split(l,' ')[1])
cfgfile.write("default rescue\n")
continue
elif string.find(l, "label ") != -1:
# see if we've left default stanza and entered a new one
if fndit and indefault:
indefault = 0
cfgfile.write(rescuestanza)
if defaultimg is not None:
curimg = string.strip(string.split(l, ' ')[1])
if curimg == defaultimg:
fndit = 1
indefault = 1
# build up the rescue stanza based on whats in the
# default stanza as we echo it out
rescuestanza = "label rescue\n"
# if we fall through then write it out
cfgfile.write(l)
else:
# we're writing out the matching stanza - if we hit the append
# line put rescue on the end of it, otherwise just echo line
if fndit and indefault:
if string.find(l, "append ") != -1:
rescuestanza = rescuestanza + string.rstrip(l)+" rescue\n"
else:
rescuestanza = rescuestanza + l
cfgfile.write(l)
cfgfile.close()
if not fndit:
print "Could not find default stanza, did not modify isolinux.cfg"
os.system("mv -f %s/isolinux/isolinux.cfg.backup %s/isolinux/isolinux.cfg" % (destdir,destdir))
else:
os.system("rm -f %s/isolinux/isolinux.cfg.backup" % (destdir,))
# synthesize a new syslinux screen
#
msgfile = open("%s/isolinux/boot.msg" % (destdir,), "w+")
msgfile.write(" \n")
msgfile.write("splash.lss\n")
# make "Red Hat" RED!
idx = string.find(productname, "Red Hat")
if idx != -1:
productstr = productname[:idx]
productstr = productstr + "02Red Hat07"
productstr = productstr + productname[idx+7:]
else:
productstr = productname
msgfile.write("This is the %s Rescue CD.\n" % (productstr,))
msgfile.write("\n")
msgfile.write(" - To enter rescue mode press the 0f<ENTER>07 key.\n")
msgfile.write("\n")
msgfile.write(" - To install or upgrade %s type \"linux\" and then the 0f<ENTER>07 key.\n" % (productstr, ))
msgfile.write("\n")
msgfile.write(" - Use the function keys listed below for more information.\n")
msgfile.write("\n")
msgfile.write("02[F1-Main] [F2-Options] [F3-General] [F4-Kernel] [F5-Rescue]07\n")
msgfile.close()
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