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