1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
#!/usr/bin/python
import ConfigParser
import os
import sys
sys.stdout.write("builder running...\n")
# Initialization
os.system("mount -t tmpfs tmpfs /etc")
os.mkdir("/etc/rootstrap")
os.system("mount -t hostfs hostfs -o /etc/rootstrap /etc/rootstrap")
os.system("mount -t tmpfs tmpfs /dev")
os.system("mount -t proc proc /proc")
os.system("mount -t tmpfs tmpfs /tmp")
os.system("mount -t tmpfs tmpfs /lib/modules")
os.system("mount -t hostfs hostfs -o /usr/lib/uml/modules /lib/modules")
os.mkdir("/tmp/target")
os.mkdir("/tmp/host")
os.system("mount -t hostfs hostfs /tmp/host")
# Parse kernel command line
workdir = '~/.rootstrap'
configfile = None
for arg in open('/proc/cmdline').read().split():
argsplit = arg.split('=')
if len(argsplit) > 1:
if argsplit[0] == 'rsworkdir':
workdir = os.path.expanduser(argsplit[1])
elif argsplit[0] == 'rsconfig':
configfile = '/tmp/host' + \
os.path.expanduser(os.path.join('/tmp/host',os.path.expanduser(argsplit[1])))
os.system("mount -t hostfs hostfs -o %s /etc/rootstrap/workdir" % workdir)
def dispatch(module, vars):
"Invoke a rootstrap module"
for scriptpat in ('/etc/rootstrap/workdir/modules/%s',
'/etc/rootstrap/modules/%s',
'/usr/lib/rootstrap/modules/%s'):
script = scriptpat % module
if os.path.exists(script):
# try to ease module debugging
#
# debug_exit == 0 --> exit and raise exception
# 1 --> re-eval script that failed
# 2 --> go on with next script
# X --> exit and raise exception
while 1:
print "Using rootstrap module %s from:\n\t%s" % (module,script)
status = os.spawnle(os.P_WAIT, script, script, vars)
if status != 0:
if "debug" in vars and vars["debug"] == "true":
print "Module %s failed with status %d: %s" % \
(module,status,os.strerror(status))
print "The exit value from the shell will be evaluated:"
print " 0 --> exit and raise exception"
print " 1 --> re-eval script that failed"
print " 2 --> go on with next script"
print " N --> exit and raise exception"
debug_exit = os.spawnle(os.P_WAIT, "/bin/sh", "/bin/sh", vars)
if debug_exit == 1:
continue
elif debug_exit == 2:
return
raise "rootstrap: Module '%s' failed, status %d: %s" % \
(module,status,os.strerror(status))
return
raise "rootstrap: unknown module: %s\n" % module
config = ConfigParser.ConfigParser()
config.optionxform = str # case sensitive
config.readfp(open('/etc/rootstrap/rootstrap.conf'))
config.read(('/etc/rootstrap/workdir/rootstrap.conf',))
if configfile:
config.read(configfile)
globalvars = { 'TARGET' : '/tmp/target', 'WORKDIR' : '/etc/rootstrap/workdir', 'HOST' : '/tmp/host' }
for var in config.options('global'):
globalvars[var] = config.get('global', var)
for module in config.get('global', 'modules').split():
modulevars = globalvars
if config.has_section(module):
for var in config.options(module):
modulevars[var] = config.get(module,var)
dispatch(module, modulevars)
os.system("mount -o remount,ro hostfs /")
os.system("/sbin/halt -d -f")
|
