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"""Shared AIX support functions."""
import sys
import sysconfig
# Taken from _osx_support _read_output function
def _read_cmd_output(commandstring, capture_stderr=False):
"""Output from successful command execution or None"""
# Similar to os.popen(commandstring, "r").read(),
# but without actually using os.popen because that
# function is not usable during python bootstrap.
import os
import contextlib
fp = open("/tmp/_aix_support.%s"%(
os.getpid(),), "w+b")
with contextlib.closing(fp) as fp:
if capture_stderr:
cmd = "%s >'%s' 2>&1" % (commandstring, fp.name)
else:
cmd = "%s 2>/dev/null >'%s'" % (commandstring, fp.name)
return fp.read() if not os.system(cmd) else None
def _aix_tag(vrtl, bd):
# type: (List[int], int) -> str
# Infer the ABI bitwidth from maxsize (assuming 64 bit as the default)
_sz = 32 if sys.maxsize == (2**31-1) else 64
_bd = bd if bd != 0 else 9988
# vrtl[version, release, technology_level]
return "aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(vrtl[0], vrtl[1], vrtl[2], _bd, _sz)
# extract version, release and technology level from a VRMF string
def _aix_vrtl(vrmf):
# type: (str) -> List[int]
v, r, tl = vrmf.split(".")[:3]
return [int(v[-1]), int(r), int(tl)]
def _aix_bos_rte():
# type: () -> Tuple[str, int]
"""
Return a Tuple[str, int] e.g., ['7.1.4.34', 1806]
The fileset bos.rte represents the current AIX run-time level. It's VRMF and
builddate reflect the current ABI levels of the runtime environment.
If no builddate is found give a value that will satisfy pep425 related queries
"""
# All AIX systems to have lslpp installed in this location
# subprocess may not be available during python bootstrap
try:
import subprocess
out = subprocess.check_output(["/usr/bin/lslpp", "-Lqc", "bos.rte"])
except ImportError:
out = _read_cmd_output("/usr/bin/lslpp -Lqc bos.rte")
out = out.decode("utf-8")
out = out.strip().split(":") # type: ignore
_bd = int(out[-1]) if out[-1] != '' else 9988
return (str(out[2]), _bd)
def aix_platform():
# type: () -> str
"""
AIX filesets are identified by four decimal values: V.R.M.F.
V (version) and R (release) can be retrieved using ``uname``
Since 2007, starting with AIX 5.3 TL7, the M value has been
included with the fileset bos.rte and represents the Technology
Level (TL) of AIX. The F (Fix) value also increases, but is not
relevant for comparing releases and binary compatibility.
For binary compatibility the so-called builddate is needed.
Again, the builddate of an AIX release is associated with bos.rte.
AIX ABI compatibility is described as guaranteed at: https://www.ibm.com/\
support/knowledgecenter/en/ssw_aix_72/install/binary_compatability.html
For pep425 purposes the AIX platform tag becomes:
"aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(v, r, tl, builddate, bitsize)
e.g., "aix-6107-1415-32" for AIX 6.1 TL7 bd 1415, 32-bit
and, "aix-6107-1415-64" for AIX 6.1 TL7 bd 1415, 64-bit
"""
vrmf, bd = _aix_bos_rte()
return _aix_tag(_aix_vrtl(vrmf), bd)
# extract vrtl from the BUILD_GNU_TYPE as an int
def _aix_bgt():
# type: () -> List[int]
gnu_type = sysconfig.get_config_var("BUILD_GNU_TYPE")
if not gnu_type:
raise ValueError("BUILD_GNU_TYPE is not defined")
return _aix_vrtl(vrmf=gnu_type)
def aix_buildtag():
# type: () -> str
"""
Return the platform_tag of the system Python was built on.
"""
# AIX_BUILDDATE is defined by configure with:
# lslpp -Lcq bos.rte | awk -F: '{ print $NF }'
build_date = sysconfig.get_config_var("AIX_BUILDDATE")
try:
build_date = int(build_date)
except (ValueError, TypeError):
raise ValueError(f"AIX_BUILDDATE is not defined or invalid: "
f"{build_date!r}")
return _aix_tag(_aix_bgt(), build_date)