[ SEA-GHOST MINI SHELL]
#!/usr/bin/python
#
import os
import rpm
import ctypes
import struct
_ppc64_native_is_best = True
# dict mapping arch -> ( multicompat, best personality, biarch personality )
multilibArches = { "x86_64": ( "athlon", "x86_64", "athlon" ),
"sparc64v": ( "sparcv9v", "sparcv9v", "sparc64v" ),
"sparc64": ( "sparcv9", "sparcv9", "sparc64" ),
"ppc64": ( "ppc", "ppc", "ppc64" ),
"s390x": ( "s390", "s390x", "s390" ),
}
if _ppc64_native_is_best:
multilibArches["ppc64"] = ( "ppc", "ppc64", "ppc64" )
arches = {
# ia32
"athlon": "i686",
"i686": "i586",
"geode": "i686",
"i586": "i486",
"i486": "i386",
"i386": "noarch",
# amd64
"x86_64": "athlon",
"amd64": "x86_64",
"ia32e": "x86_64",
#ppc64le
"ppc64le": "noarch",
# ppc
"ppc64p7": "ppc64",
"ppc64pseries": "ppc64",
"ppc64iseries": "ppc64",
"ppc64": "ppc",
"ppc": "noarch",
# s390{,x}
"s390x": "s390",
"s390": "noarch",
# sparc
"sparc64v": "sparcv9v",
"sparc64": "sparcv9",
"sparcv9v": "sparcv9",
"sparcv9": "sparcv8",
"sparcv8": "sparc",
"sparc": "noarch",
# alpha
"alphaev7": "alphaev68",
"alphaev68": "alphaev67",
"alphaev67": "alphaev6",
"alphaev6": "alphapca56",
"alphapca56": "alphaev56",
"alphaev56": "alphaev5",
"alphaev5": "alphaev45",
"alphaev45": "alphaev4",
"alphaev4": "alpha",
"alpha": "noarch",
# arm
"armv7l": "armv6l",
"armv6l": "armv5tejl",
"armv5tejl": "armv5tel",
"armv5tel": "noarch",
#arm hardware floating point
"armv7hnl": "armv7hl",
"armv7hl": "noarch",
# arm64
"arm64": "noarch",
# aarch64
"aarch64": "noarch",
# super-h
"sh4a": "sh4",
"sh4": "noarch",
"sh3": "noarch",
#itanium
"ia64": "noarch",
}
# Will contain information parsed from /proc/self/auxv via _parse_auxv().
# Should move into rpm really.
_aux_vector = {
"platform": "",
"hwcap": 0,
}
def legitMultiArchesInSameLib(arch=None):
# this is completely crackrock - if anyone has a better way I
# am all ears
arch = getBestArch(arch)
if isMultiLibArch(arch):
arch = getBaseArch(myarch=arch)
results = [arch]
if arch in ('x86_64', 'ppc64') or arch.startswith('sparcv9'):
for (k, v) in arches.items():
if v == arch:
results.append(k)
return results
def canCoinstall(arch1, arch2):
"""Take two arches and return True if it is possible that they can be
installed together with the same nevr. Ex: arch1=i386 and arch2=i686 then
it will return False. arch1=i386 and arch2=x86_64 will return True.
It does not determine whether or not the arches make any sense. Just whether
they could possibly install w/o conflict"""
# if both are a multlibarch then we can't coinstall (x86_64, ia32e)
# if both are not multilibarches then we can't coinstall (i386, i686)
if 'noarch' in [arch1, arch2]: # noarch can never coinstall
return False
if isMultiLibArch(arch=arch1) == isMultiLibArch(arch=arch2):
return False
# this section keeps arch1=x86_64 arch2=ppc from returning True
if arch1 in getArchList(arch2) or arch2 in getArchList(arch1):
return True
return False
# this computes the difference between myarch and targetarch
def archDifference(myarch, targetarch):
if myarch == targetarch:
return 1
if myarch in arches:
ret = archDifference(arches[myarch], targetarch)
if ret != 0:
return ret + 1
return 0
return 0
def score(arch):
return archDifference(canonArch, arch)
def isMultiLibArch(arch=None):
"""returns true if arch is a multilib arch, false if not"""
if arch is None:
arch = canonArch
if arch not in arches: # or we could check if it is noarch
return 0
if arch in multilibArches:
return 1
if arches[arch] in multilibArches:
return 1
return 0
def getBestArchFromList(archlist, myarch=None):
"""
return the best arch from the list for myarch if - myarch is not given,
then return the best arch from the list for the canonArch.
"""
if len(archlist) == 0:
return None
if myarch is None:
myarch = canonArch
mybestarch = getBestArch(myarch)
bestarch = getBestArch(myarch)
if bestarch != myarch:
bestarchchoice = getBestArchFromList(archlist, bestarch)
if bestarchchoice != None and bestarchchoice != "noarch":
return bestarchchoice
thisarch = archlist[0]
for arch in archlist[1:]:
val1 = archDifference(myarch, thisarch)
val2 = archDifference(myarch, arch)
if val1 == 0 and val2 == 0:
continue
if val1 < val2:
if val1 == 0:
thisarch = arch
if val2 < val1:
if val2 != 0:
thisarch = arch
if val1 == val2:
pass
# thisarch should now be our bestarch
# one final check to make sure we're not returning a bad arch
val = archDifference(myarch, thisarch)
if val == 0:
return None
return thisarch
def getArchList(thisarch=None):
# this returns a list of archs that are compatible with arch given
if not thisarch:
thisarch = canonArch
archlist = [thisarch]
while thisarch in arches:
thisarch = arches[thisarch]
archlist.append(thisarch)
# hack hack hack
# sparc64v is also sparc64 compat
if archlist[0] == "sparc64v":
archlist.insert(1,"sparc64")
# if we're a weirdo arch - add noarch on there.
if len(archlist) == 1 and archlist[0] == thisarch:
archlist.append('noarch')
return archlist
def _try_read_cpuinfo():
""" Try to read /proc/cpuinfo ... if we can't ignore errors (ie. proc not
mounted). """
try:
return open("/proc/cpuinfo", "r")
except:
return []
def _parse_auxv():
""" Read /proc/self/auxv and parse it into global dict for easier access
later on, very similar to what rpm does. """
# In case we can't open and read /proc/self/auxv, just return
try:
data = open("/proc/self/auxv", "rb").read()
except:
return
# Define values from /usr/include/elf.h
AT_PLATFORM = 15
AT_HWCAP = 16
fmtlen = struct.calcsize("LL")
offset = 0
platform = ctypes.c_char_p()
# Parse the data and fill in _aux_vector dict
while offset <= len(data) - fmtlen:
at_type, at_val = struct.unpack_from("LL", data, offset)
if at_type == AT_PLATFORM:
platform.value = at_val
_aux_vector["platform"] = platform.value
if at_type == AT_HWCAP:
_aux_vector["hwcap"] = at_val
offset = offset + fmtlen
def getCanonX86Arch(arch):
#
if arch == "i586":
for line in _try_read_cpuinfo():
if line.startswith("model name"):
if line.find("Geode(TM)") != -1:
return "geode"
break
return arch
# only athlon vs i686 isn't handled with uname currently
if arch != "i686":
return arch
# if we're i686 and AuthenticAMD, then we should be an athlon
for line in _try_read_cpuinfo():
if line.startswith("vendor") and line.find("AuthenticAMD") != -1:
return "athlon"
# i686 doesn't guarantee cmov, but we depend on it
elif line.startswith("flags"):
if line.find("cmov") == -1:
return "i586"
break
return arch
def getCanonARMArch(arch):
# the %{_target_arch} macro in rpm will let us know the abi we are using
target = rpm.expandMacro('%{_target_cpu}')
if target.startswith('armv7h'):
return target
return arch
def getCanonPPCArch(arch):
# FIXME: should I do better handling for mac, etc?
if arch != "ppc64":
return arch
machine = None
for line in _try_read_cpuinfo():
if line.find("machine") != -1:
machine = line.split(':')[1]
break
platform = _aux_vector["platform"]
if machine is None and not platform:
return arch
try:
if platform.startswith("power") and int(platform[5:].rstrip('+')) >= 7:
return "ppc64p7"
except:
pass
if machine is None:
return arch
if machine.find("CHRP IBM") != -1:
return "ppc64pseries"
if machine.find("iSeries") != -1:
return "ppc64iseries"
return arch
def getCanonSPARCArch(arch):
# Deal with sun4v, sun4u, sun4m cases
SPARCtype = None
for line in _try_read_cpuinfo():
if line.startswith("type"):
SPARCtype = line.split(':')[1]
break
if SPARCtype is None:
return arch
if SPARCtype.find("sun4v") != -1:
if arch.startswith("sparc64"):
return "sparc64v"
else:
return "sparcv9v"
if SPARCtype.find("sun4u") != -1:
if arch.startswith("sparc64"):
return "sparc64"
else:
return "sparcv9"
if SPARCtype.find("sun4m") != -1:
return "sparcv8"
return arch
def getCanonX86_64Arch(arch):
if arch != "x86_64":
return arch
vendor = None
for line in _try_read_cpuinfo():
if line.startswith("vendor_id"):
vendor = line.split(':')[1]
break
if vendor is None:
return arch
if vendor.find("Authentic AMD") != -1 or vendor.find("AuthenticAMD") != -1:
return "amd64"
if vendor.find("GenuineIntel") != -1:
return "ia32e"
return arch
def getCanonArch(skipRpmPlatform = 0):
if not skipRpmPlatform and os.access("/etc/rpm/platform", os.R_OK):
try:
f = open("/etc/rpm/platform", "r")
line = f.readline()
f.close()
(arch, vendor, opersys) = line.split("-", 2)
return arch
except:
pass
arch = os.uname()[4]
_parse_auxv()
if (len(arch) == 4 and arch[0] == "i" and arch[2:4] == "86"):
return getCanonX86Arch(arch)
if arch.startswith("arm"):
return getCanonARMArch(arch)
if arch.startswith("ppc"):
return getCanonPPCArch(arch)
if arch.startswith("sparc"):
return getCanonSPARCArch(arch)
if arch == "x86_64":
return getCanonX86_64Arch(arch)
return arch
canonArch = getCanonArch()
# this gets you the "compat" arch of a biarch pair
def getMultiArchInfo(arch = canonArch):
if arch in multilibArches:
return multilibArches[arch]
if arch in arches and arches[arch] != "noarch":
return getMultiArchInfo(arch = arches[arch])
return None
# get the best usual userspace arch for the arch we're on. this is
# our arch unless we're on an arch that uses the secondary as its
# userspace (eg ppc64, sparc64)
def getBestArch(myarch=None):
if myarch:
arch = myarch
else:
arch = canonArch
if arch.startswith("sparc64"):
arch = multilibArches[arch][1]
if arch.startswith("ppc64") and not _ppc64_native_is_best and arch != "ppc64le":
arch = 'ppc'
return arch
def getBaseArch(myarch=None):
"""returns 'base' arch for myarch, if specified, or canonArch if not.
base arch is the arch before noarch in the arches dict if myarch is not
a key in the multilibArches."""
if not myarch:
myarch = canonArch
if myarch not in arches: # this is dumb, but <shrug>
return myarch
if myarch.startswith("sparc64"):
return "sparc"
elif myarch == "ppc64le":
return "ppc64le"
elif myarch.startswith("ppc64") and not _ppc64_native_is_best:
return "ppc"
elif myarch.startswith("arm64"):
return "arm64"
elif myarch.startswith("armv7h"):
return "armhfp"
elif myarch.startswith("arm"):
return "arm"
if isMultiLibArch(arch=myarch):
if myarch in multilibArches:
return myarch
else:
return arches[myarch]
if myarch in arches:
basearch = myarch
value = arches[basearch]
while value != 'noarch':
basearch = value
value = arches[basearch]
return basearch
class ArchStorage(object):
"""class for keeping track of what arch we have set and doing various
permutations based on it"""
def __init__(self):
self.canonarch = None
self.basearch = None
self.bestarch = None
self.compatarches = []
self.archlist = []
self.multilib = False
self.setup_arch()
def setup_arch(self, arch=None, archlist_includes_compat_arch=True):
if arch:
self.canonarch = arch
else:
self.canonarch = canonArch
self.basearch = getBaseArch(myarch=self.canonarch)
self.archlist = getArchList(thisarch=self.canonarch)
if not archlist_includes_compat_arch: # - do we bother including i686 and below on x86_64
limit_archlist = []
for a in self.archlist:
if isMultiLibArch(a) or a == 'noarch':
limit_archlist.append(a)
self.archlist = limit_archlist
self.bestarch = getBestArch(myarch=self.canonarch)
self.compatarches = getMultiArchInfo(arch=self.canonarch)
self.multilib = isMultiLibArch(arch=self.canonarch)
self.legit_multi_arches = legitMultiArchesInSameLib(arch = self.canonarch)
def get_best_arch_from_list(self, archlist, fromarch=None):
if not fromarch:
fromarch = self.canonarch
return getBestArchFromList(archlist, myarch=fromarch)
def score(self, arch):
return archDifference(self.canonarch, arch)
def get_arch_list(self, arch):
if not arch:
return self.archlist
return getArchList(thisarch=arch)
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