#!/usr/bin/python3 -u

# -*- coding: utf-8 -*-

# WARNING: python -u means unbuffered I/O. Without it the messages are

# passed to the parent asynchronously which looks bad in clients.

from subprocess import Popen, PIPE

import sys

import os

import getopt

GETTEXT_PROGNAME = "@PACKAGE@"

import locale

import gettext

_ = lambda x: gettext.gettext(x)

verbose = 0

def log_warning(s):

    sys.stderr.write("%s\n" % s)

def log1(message):

    if verbose > 0:

        log_warning(message)

def log2(message):

    if verbose > 1:

        log_warning(message)

def error_msg(s):

    sys.stderr.write("%s\n" % s)

def error_msg_and_die(s):

    sys.stderr.write("%s\n" % s)

    sys.exit(1)

def xopen(name, mode):

    try:

        r = open(name, mode)

    except IOError as ex:

        error_msg_and_die("Can't open '%s': %s" % (name, ex))

    return r

def init_gettext():

    try:

        locale.setlocale(locale.LC_ALL, "")

    except locale.Error:

        os.environ['LC_ALL'] = 'C'

        locale.setlocale(locale.LC_ALL, "")

    # Defeat "AttributeError: 'module' object has no attribute 'nl_langinfo'"

    try:

        gettext.bind_textdomain_codeset(GETTEXT_PROGNAME, locale.nl_langinfo(locale.CODESET))

    except AttributeError:

        pass

    gettext.bindtextdomain(GETTEXT_PROGNAME, "@localedir@")

    gettext.textdomain(GETTEXT_PROGNAME)

#eu_unstrip_OUT=`eu-unstrip "--core=$core" -n 2>eu_unstrip.ERR`

def extract_info_from_core(coredump_name):

    """

    Extracts builds with filenames,

    Returns a list of tuples (build_id, filename)

    """

    #OFFSET = 0

    BUILD_ID = 1

    LIBRARY = 2

    #SEP = 3

    EXECUTABLE = 4

    log_warning(_("Analyzing coredump '%s'") % coredump_name)

    eu_unstrip_OUT = Popen(["eu-unstrip","--core=%s" % coredump_name, "-n"], stdout=PIPE, bufsize=-1, universal_newlines=True).communicate()[0]

    # parse eu_unstrip_OUT and return the list of build_ids

    # eu_unstrip_OUT = (

    # "0x7f42362ca000+0x204000 c4d35d993598a6242f7525d024b5ec3becf5b447@0x7f42362ca1a0 /usr/lib64/libcanberra-gtk.so.0 - libcanberra-gtk.so.0\n"

    # "0x3afa400000+0x210000 607308f916c13c3ad9ee503008d31fa671ba73ce@0x3afa4001a0 /usr/lib64/libcanberra.so.0 - libcanberra.so.0\n"

    # "0x3afa400000+0x210000 607308f916c13c3ad9ee503008d31fa671ba73ce@0x3afa4001a0 /usr/lib64/libcanberra.so.0 - libcanberra.so.0\n"

    # "0x3bc7000000+0x208000 3be016bb723e85779a23e111a8ab1a520b209422@0x3bc70001a0 /usr/lib64/libvorbisfile.so.3 - libvorbisfile.so.3\n"

    # "0x7f423609e000+0x22c000 87f9c7d9844f364c73aa2566d6cfc9c5fa36d35d@0x7f423609e1a0 /usr/lib64/libvorbis.so.0 - libvorbis.so.0\n"

    # "0x7f4235e99000+0x205000 b5bc98c125a11b571cf4f2746268a6d3cfa95b68@0x7f4235e991a0 /usr/lib64/libogg.so.0 - libogg.so.0\n"

    # "0x7f4235c8b000+0x20e000 f1ff6c8ee30dba27e90ef0c5b013df2833da2889@0x7f4235c8b1a0 /usr/lib64/libtdb.so.1 - libtdb.so.1\n"

    # "0x3bc3000000+0x209000 8ef56f789fd914e8d0678eb0cdfda1bfebb00b40@0x3bc30001a0 /usr/lib64/libltdl.so.7 - libltdl.so.7\n"

    # "0x7f4231b64000+0x22b000 3ca5b83798349f78b362b1ea51c8a4bc8114b8b1@0x7f4231b641a0 /usr/lib64/gio/modules/libgvfsdbus.so - libgvfsdbus.so\n"

    # "0x7f423192a000+0x218000 ad024a01ad132737a8cfc7c95beb7c77733a652d@0x7f423192a1a0 /usr/lib64/libgvfscommon.so.0 - libgvfscommon.so.0\n"

    # "0x7f423192a000+0x218000 ad024a01ad132737a8cfc7c95beb7c77733a652d@0x7f423192a1a0 /usr/lib64/libgvfscommon.so.0 - libgvfscommon.so.0\n"

    # "0x3bb8e00000+0x20e000 d240ac5755184a95c783bb98a2d05530e0cf958a@0x3bb8e001a0 /lib64/libudev.so.0 - libudev.so.0\n"

    # )

    #print eu_unstrip_OUT

    # we failed to get build ids from the core -> die

    if not eu_unstrip_OUT:

        error_msg_and_die("Can't get build ids from %s" % coredump_name)

    lines = eu_unstrip_OUT.split('\n')

    # using set ensures the unique values

    build_ids = set()

    libraries = set()

    for line in lines:

        b_ids_line = line.split()

        if len(b_ids_line) >= EXECUTABLE:

            # [exe] -> the executable itself

            # linux-vdso.so.1 -> Virtual Dynamic Shared Object

            # linux-gate.so.1 -> the same as vdso

            # See https://bugzilla.redhat.com/show_bug.cgi?id=706969

            # "Please split kernel debuginfo packages so that VDSO debuginfos are separate" -

            # we might want to remove this special-casing later.

            if b_ids_line[BUILD_ID] == '-':

                log_warning(_("Missing build id: %s" % b_ids_line[EXECUTABLE]))

            elif ((len(b_ids_line) == EXECUTABLE) or (b_ids_line[EXECUTABLE] not in ["linux-vdso.so.1", "linux-gate.so.1"])):

                build_id = b_ids_line[BUILD_ID].split('@')[0]

                build_ids.add(build_id)

                library = b_ids_line[LIBRARY]

                libraries.add(library)

            else:

                log2("skipping line '%s'" % line)

    log1("Found %i build_ids" % len(build_ids))

    log1("Found %i libs" % len(libraries))

    return build_ids

def build_ids_to_path(build_ids):

    """

    build_id1=${build_id:0:2}

    build_id2=${build_id:2}

    file="usr/lib/debug/.build-id/$build_id1/$build_id2.debug"

    """

    return ["/usr/lib/debug/.build-id/%s/%s.debug" % (b_id[:2], b_id[2:]) for b_id in build_ids]

if __name__ == "__main__":

    # localization

    init_gettext()

    ABRT_VERBOSE = os.getenv("ABRT_VERBOSE")

    if (ABRT_VERBOSE):

        try:

            verbose = int(ABRT_VERBOSE)

        except:

            pass

    progname = os.path.basename(sys.argv[0])

    help_text = _("Usage: %s [-v] [-o OUTFILE] -c COREFILE") % progname

    try:

        opts, args = getopt.getopt(sys.argv[1:], "vhc:o:", ["help", "core="])

    except getopt.GetoptError as err:

        error_msg(err) # prints something like "option -a not recognized"

        error_msg_and_die(help_text)

    core = None

    opt_o = None

    for opt, arg in opts:

        if opt in ("-h", "--help"):

            print(help_text)

            exit(0)

        elif opt == "-v":

            verbose += 1

        elif opt == "-o":

            opt_o = arg

        elif opt in ("-c", "--core"):

            core = arg

    if not core:

        error_msg(_("COREFILE is not specified"))

        error_msg_and_die(help_text)

    b_ids = extract_info_from_core(core)

    try:

        # Note that we open -o FILE only when we reach the point

        # when we are definitely going to write something to it

        outfile = sys.stdout

        outname = opt_o

        # Make sure the file is readable for all

        oldmask = os.umask(0o002)

        for bid in b_ids:

            if outname:

                outfile = xopen(outname, "w")

                outname = None

            outfile.write("%s\n" % bid)

        outfile.close()

        os.umask(oldmask)

    except IOError as e:

        if not opt_o:

            opt_o = "<stdout>"

        error_msg_and_die("Error writing to '%s': %s" % (opt_o, e))