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#!/usr/bin/env python
#
# this program is used to find source code that includes linux kernel headers directly
# (e.g. with #include <linux/...> or #include <asm/...>)
#
# then it lists them on the standard output.
import sys, cpp, glob, os, re, getopt, kernel
from utils import *
from defaults import *
program_dir = find_program_dir()
wanted_archs = kernel_archs
wanted_config = None
def usage():
print """\
usage: find_headers.py [options] <kernel-root> (file|directory|@listfile)+
options:
-c <file> specify .config file (none by default)
-a <archs> used to specify an alternative list
of architectures to support
('%s' by default)
-v enable verbose mode
this program is used to find all the kernel headers that are used
by a set of source files or directories containing them. the search
is recursive to find *all* required files.
""" % ( string.join(kernel_archs,",") )
sys.exit(1)
try:
optlist, args = getopt.getopt( sys.argv[1:], 'vc:d:a:k:' )
except:
# unrecognized option
print "error: unrecognized option"
usage()
for opt, arg in optlist:
if opt == '-a':
wanted_archs = string.split(arg,',')
elif opt == '-c':
wanted_config = arg
elif opt == '-v':
kernel.verboseSearch = 1
kernel.verboseFind = 1
verbose = 1
else:
usage()
if len(args) < 2:
usage()
kernel_root = args[0]
if not os.path.exists(kernel_root):
sys.stderr.write( "error: directory '%s' does not exist\n" % kernel_root )
sys.exit(1)
if not os.path.isdir(kernel_root):
sys.stderr.write( "error: '%s' is not a directory\n" % kernel_root )
sys.exit(1)
if not os.path.isdir(kernel_root+"/include/linux"):
sys.stderr.write( "error: '%s' does not have an 'include/linux' directory\n" % kernel_root )
sys.exit(1)
if wanted_config:
if not os.path.exists(wanted_config):
sys.stderr.write( "error: file '%s' does not exist\n" % wanted_config )
sys.exit(1)
if not os.path.isfile(wanted_config):
sys.stderr.write( "error: '%s' is not a file\n" % wanted_config )
sys.exit(1)
# find all architectures in the kernel tree
archs = []
for archdir in os.listdir(kernel_root+"/arch"):
if os.path.exists("%s/arch/%s/include/asm" % (kernel_root, archdir)):
if verbose:
print "Found arch '%s'" % archdir
archs.append(archdir)
# if we're using the 'kernel_headers' directory, there is only asm/
# and no other asm-<arch> directories (arm is assumed, which sucks)
#
in_kernel_headers = False
if len(archs) == 0:
# this can happen when we're using the 'kernel_headers' directory
if os.path.isdir(kernel_root+"/asm"):
in_kernel_headers = True
archs = [ "arm" ]
# if the user has specified some architectures with -a <archs> ensure that
# all those he wants are available from the kernel include tree
if wanted_archs != None:
if in_kernel_headers and wanted_archs != [ "arm" ]:
sys.stderr.write( "error: when parsing kernel_headers, 'arm' architecture only is supported at the moment\n" )
sys.exit(1)
missing = []
for arch in wanted_archs:
if arch not in archs:
missing.append(arch)
if len(missing) > 0:
sys.stderr.write( "error: the following requested architectures are not in the kernel tree: " )
for a in missing:
sys.stderr.write( " %s" % a )
sys.stderr.write( "\n" )
sys.exit(1)
archs = wanted_archs
# helper function used to walk the user files
def parse_file(path, parser):
#print "parse %s" % path
parser.parseFile(path)
# remove previous destination directory
#destdir = "/tmp/bionic-kernel-headers/"
#cleanup_dir(destdir)
# try to read the config file
try:
cparser = kernel.ConfigParser()
if wanted_config:
cparser.parseFile( wanted_config )
except:
sys.stderr.write( "error: can't parse '%s'" % wanted_config )
sys.exit(1)
kernel_config = cparser.getDefinitions()
# first, obtain the list of kernel files used by our clients
fparser = kernel.HeaderScanner()
dir_excludes=[".repo","external/kernel-headers","ndk","out","prebuilt","bionic/libc/kernel","development/ndk","external/qemu/distrib"]
walk_source_files( args[1:], parse_file, fparser, excludes=["./"+f for f in dir_excludes] )
headers = fparser.getHeaders()
files = fparser.getFiles()
# now recursively scan the kernel headers for additionnal sub-included headers
hparser = kernel.KernelHeaderFinder(headers,archs,kernel_root,kernel_config)
headers = hparser.scanForAllArchs()
if 0: # just for debugging
dumpHeaderUsers = False
print "the following %d headers:" % len(headers)
for h in sorted(headers):
if dumpHeaderUsers:
print " %s (%s)" % (h, repr(hparser.getHeaderUsers(h)))
else:
print " %s" % h
print "are used by the following %d files:" % len(files)
for f in sorted(files):
print " %s" % f
sys.exit(0)
for h in sorted(headers):
print "%s" % h
sys.exit(0)
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