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#!/usr/bin/python
#
# mk-rescueimage.ppc - builds a rescue image from an existing tree
# which can be converted into a yaboot bootable
# iso and used as a sysadmin rescue image.
#
#
# Usage: mk-rescueimage.ppc <src-tree> <dest-dir> <productname>
#
# the rescue image will be created as <dest-dir>/ppc-rescueimage
#
import os
import sys
import string
def usage():
print "usage: mk-rescueimage.ppc <toplevel> <dest-dir> <productname> [<productpath>]"
sys.exit(0)
if len(sys.argv) < 5:
usage()
sys.exit(1)
if not os.access("%s/ppc" % (sys.argv[2],), os.F_OK):
print "ERROR - Destination directory %s does not contain a ppc directory!" % (sys.argv[2],)
sys.exit(1)
srcdir = sys.argv[1]
destdir = sys.argv[2]+"/ppc-rescueimage"
productname = sys.argv[3]
if len(sys.argv) > 4:
productpath = sys.argv[4]
# clean and create destination directory
os.system("rm -rf %s" % (destdir,))
os.system("mkdir %s" % (destdir,))
# cp boot_image
os.system("cp -a %s/boot_image %s/" % (srcdir, 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 yaboot files
os.system("cp -a %s/ppc %s/" % (srcdir, destdir))
os.system("cp -a %s/etc %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))
for arch in ("ppc32", "ppc64"):
# munge various yaboot configs to have a default of rescue mode
cfgfile = open("%s/ppc/%s/yaboot.conf" % (destdir, arch), "r")
cfglines = cfgfile.readlines()
cfgfile.close()
# backup old one
os.system("cp %s/ppc/%s/yaboot.conf %s/ppc/%s/yaboot.conf.backup" % (destdir, arch, destdir, arch))
cfgfile = open("%s/ppc/%s/yaboot.conf" % (destdir, arch), "w+")
fndit = 0
for l in cfglines:
if string.find(l, "Welcome") != -1:
cfgfile.write(l.replace("installer", "rescue"))
continue
if string.find(l, "default=") != -1:
cfgfile.write("default=rescue\n")
continue
# see if we're into the stanza now
elif string.find(l, "image=") != -1:
fndit = 1
# build up the rescue stanza based on whats in the
# default stanza as we echo it out
rescuestanza = l + " 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:
if string.find(l, "read-only") != -1:
rescuestanza = rescuestanza + l + " append=rescue\n"
else:
if not string.find(l, "label=") != -1:
rescuestanza = rescuestanza + l
cfgfile.write(l)
if fndit:
cfgfile.write('\n' + rescuestanza)
cfgfile.close()
if not fndit:
print "Could not find default stanza, did not modify yaboot.conf"
os.system("mv -f %s/ppc/%s/yaboot.conf.backup %s/ppc/%s/yaboot.conf" % (destdir, arch, destdir, arch))
else:
os.system("rm -f %s/ppc/%s/yaboot.conf.backup" % (destdir, arch))
# Modify top level yaboot to indicate rescue CD instead of install CD
#
cfgfile = open("%s/etc/yaboot.conf" % (destdir,), "r")
cfglines = cfgfile.readlines()
cfgfile.close()
cfgfile = open("%s/etc/yaboot.conf" % (destdir,), "w")
origlines = ''
rescuelines = ''
# do some inline replacements of text
for l in cfglines:
if l.find("init-message") != -1:
entry = cfglines.index(l)
cfglines[entry] = cfglines[entry].replace("installer", "rescue")
cfglines[entry] = cfglines[entry].replace("linux32", "rescue32")
continue
if l.find("default=") != -1:
cfglines[cfglines.index(l)] = l.replace("linux", "rescue")
continue
if l.find("image=/ppc/ppc64") != -1:
origlines = cfglines[cfglines.index(l):]
break
# create a big string that is easier to do replacements on
for l in origlines:
rescuelines += l
# Do replacements on the big string
rescuelines = rescuelines.replace("label=linux64", "label=rescue64")
rescuelines = rescuelines.replace("alias=linux", "alias=rescue")
rescuelines = rescuelines.replace("label=linux32", "label=rescue32")
rescuelines = rescuelines.replace("read-only", "read-only\n append=rescue")
for l in cfglines:
cfgfile.write(l)
cfgfile.write('\n' + rescuelines)
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