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#!/usr/bin/env python
import Options

if Options.options.disable_fault_handling:
    conf.DEFINE('HAVE_DISABLE_FAULT_HANDLING',1)

# backtrace could be in libexecinfo or in libc
conf.CHECK_FUNCS_IN('backtrace backtrace_symbols', 'execinfo', checklibc=True, headers='execinfo.h')

conf.CHECK_FUNCS('sigprocmask sigblock sigaction')

xattr_headers='sys/attributes.h attr/xattr.h sys/xattr.h'
conf.CHECK_FUNCS_IN('flistxattr', 'attr', checklibc=True, headers=xattr_headers)

conf.CHECK_CODE('getxattr(NULL, NULL, NULL, 0, 0, 0)',
                headers=xattr_headers, local_include=False,
                define='XATTR_ADDITIONAL_OPTIONS',
                msg='Checking for darwin xattr api')

if conf.CONFIG_SET('HAVE_FLISTXATTR'):
    conf.DEFINE('HAVE_XATTR_SUPPORT', 1)



conf.CHECK_STRUCTURE_MEMBER('struct statvfs', 'f_frsize', define='HAVE_FRSIZE', headers='sys/statvfs.h')

# all the different ways of doing statfs
statfs_types = [
    ( 'STAT_STATVFS64',
      'Linux statvfs64',
      'struct statvfs64 fsd; exit(statvfs64 (".", &fsd))',
      'sys/statvfs.h' ),

    ( 'STAT_STATVFS',
      'statvfs (SVR4)',
      'struct statvfs fsd; exit(statvfs(0, &fsd))',
      'sys/statvfs.h' ),

    ( 'STAT_STATFS3_OSF1',
      '3-argument statfs function (DEC OSF/1)',
      'struct statfs fsd; fsd.f_fsize = 0; exit(statfs(".", &fsd, sizeof(struct statfs)))'
      'sys/param.h sys/mount.h' ),

    ( 'STAT_STATFS2_BSIZE',
      'two-argument statfs with statfs.bsize',
      'struct statfs fsd; fsd.f_bsize = 0; exit(statfs(".", &fsd))',
      'sys/param.h sys/mount.h  sys/vfs.h' ),

    ( 'STAT_STATFS4',
      'four-argument statfs  (AIX-3.2.5, SVR3)',
      'struct statfs fsd; exit(statfs(".", &fsd, sizeof fsd, 0))',
      'sys/statfs.h' ),

    ( 'STAT_STATFS2_FSIZE',
      'two-argument statfs with statfs.fsize',
      'struct statfs fsd; fsd.f_fsize = 0; exit(statfs(".", &fsd))'
      'sys/param.h sys/mount.h' ),

    ( 'STAT_STATFS2_FS_DATA',
      'two-argument statfs with struct fs_data (Ultrix)',
      'struct fs_data fsd; exit(statfs(".", &fsd) != 1)',
      'sys/param.h sys/mount.h sys/fs_types.h' )
]

found_statfs=False
for (define, msg, code, headers) in statfs_types:
    if conf.CHECK_CODE(code,
                       define=define,
                       headers=headers,
                       msg='Checking for %s' % msg,
                       local_include=False):
        found_statfs=True
        break

if not found_statfs:
    print("FATAL: Failed to find a statfs method")
    raise


conf.CHECK_CODE('struct statvfs buf; buf.f_fsid = 0',
                define='HAVE_FSID_INT',
                msg='Checking if f_fsid is an integer',
                execute=False,
                local_include=False,
                headers='sys/statvfs.h')

# fsusage.c assumes that statvfs has an f_frsize entry. Some weird
# systems use f_bsize.
conf.CHECK_CODE('struct statvfs buf; buf.f_frsize = 0',
                define='HAVE_FRSIZE',
                msg='Checking that statvfs.f_frsize works',
                headers='sys/statvfs.h',
                execute=False,
                local_include=False)

# Some systems use f_flag in struct statvfs while others use f_flags
conf.CHECK_CODE('struct statvfs buf; buf.f_flag = 0',
                define='HAVE_STATVFS_F_FLAG',
                msg='Checking whether statvfs.f_flag exists',
                headers='sys/statvfs.h',
                local_include=False,
                execute=False)

conf.CHECK_CODE('struct statvfs buf; buf.f_flags = 0',
                define='HAVE_STATVFS_F_FLAGS',
                msg='Checking whether statvfs.f_flags exists',
                headers='sys/statvfs.h',
                local_include=False,
                execute=False)