| # common python utility routines for the Bionic tool scripts |
| |
| import sys, os, commands, string, commands |
| |
| # basic debugging trace support |
| # call D_setlevel to set the verbosity level |
| # and D(), D2(), D3(), D4() to add traces |
| # |
| verbose = 0 |
| |
| def panic(msg): |
| sys.stderr.write( find_program_name() + ": error: " ) |
| sys.stderr.write( msg ) |
| sys.exit(1) |
| |
| def D(msg): |
| global verbose |
| if verbose > 0: |
| print msg |
| |
| def D2(msg): |
| global verbose |
| if verbose >= 2: |
| print msg |
| |
| def D3(msg): |
| global verbose |
| if verbose >= 3: |
| print msg |
| |
| def D4(msg): |
| global verbose |
| if verbose >= 4: |
| print msg |
| |
| def D_setlevel(level): |
| global verbose |
| verbose = level |
| |
| |
| # other stuff |
| # |
| # |
| def find_program_name(): |
| return os.path.basename(sys.argv[0]) |
| |
| def find_program_dir(): |
| return os.path.dirname(sys.argv[0]) |
| |
| def find_file_from_upwards(from_path,target_file): |
| """find a file in the current directory or its parents. if 'from_path' is None, |
| seach from the current program's directory""" |
| path = from_path |
| if path == None: |
| path = os.path.realpath(sys.argv[0]) |
| path = os.path.dirname(path) |
| D("this script seems to be located in: %s" % path) |
| |
| while 1: |
| D("probing "+path) |
| if path == "": |
| file = target_file |
| else: |
| file = path + "/" + target_file |
| |
| if os.path.isfile(file): |
| D("found %s in %s" % (target_file, path)) |
| return file |
| |
| if path == "": |
| return None |
| |
| path = os.path.dirname(path) |
| |
| def find_bionic_root(): |
| file = find_file_from_upwards(None, "SYSCALLS.TXT") |
| if file: |
| return os.path.dirname(file) |
| else: |
| return None |
| |
| def find_kernel_headers(): |
| """try to find the directory containing the kernel headers for this machine""" |
| status, version = commands.getstatusoutput( "uname -r" ) # get Linux kernel version |
| if status != 0: |
| D("could not execute 'uname -r' command properly") |
| return None |
| |
| # get rid of the "-xenU" suffix that is found in Xen virtual machines |
| if len(version) > 5 and version[-5:] == "-xenU": |
| version = version[:-5] |
| |
| path = "/usr/src/linux-headers-" + version |
| D("probing %s for kernel headers" % (path+"/include")) |
| ret = os.path.isdir( path ) |
| if ret: |
| D("found kernel headers in: %s" % (path + "/include")) |
| return path |
| return None |
| |
| |
| # parser for the SYSCALLS.TXT file |
| # |
| class SysCallsTxtParser: |
| def __init__(self): |
| self.syscalls = [] |
| self.lineno = 0 |
| |
| def E(msg): |
| print "%d: %s" % (self.lineno, msg) |
| |
| def parse_line(self, line): |
| pos_lparen = line.find('(') |
| E = self.E |
| if pos_lparen < 0: |
| E("missing left parenthesis in '%s'" % line) |
| return |
| |
| pos_rparen = line.rfind(')') |
| if pos_rparen < 0 or pos_rparen <= pos_lparen: |
| E("missing or misplaced right parenthesis in '%s'" % line) |
| return |
| |
| return_type = line[:pos_lparen].strip().split() |
| if len(return_type) < 2: |
| E("missing return type in '%s'" % line) |
| return |
| |
| syscall_func = return_type[-1] |
| return_type = string.join(return_type[:-1],' ') |
| |
| pos_colon = syscall_func.find(':') |
| if pos_colon < 0: |
| syscall_name = syscall_func |
| else: |
| if pos_colon == 0 or pos_colon+1 >= len(syscall_func): |
| E("misplaced colon in '%s'" % line) |
| return |
| syscall_name = syscall_func[pos_colon+1:] |
| syscall_func = syscall_func[:pos_colon] |
| |
| if pos_rparen > pos_lparen+1: |
| syscall_params = line[pos_lparen+1:pos_rparen].split(',') |
| params = string.join(syscall_params,',') |
| else: |
| syscall_params = [] |
| params = "void" |
| |
| number = line[pos_rparen+1:].strip() |
| if number == "stub": |
| syscall_id = -1 |
| syscall_id2 = -1 |
| else: |
| try: |
| if number[0] == '#': |
| number = number[1:].strip() |
| numbers = string.split(number,',') |
| syscall_id = int(numbers[0]) |
| syscall_id2 = syscall_id |
| if len(numbers) > 1: |
| syscall_id2 = int(numbers[1]) |
| except: |
| E("invalid syscall number in '%s'" % line) |
| return |
| |
| t = { "id" : syscall_id, |
| "id2" : syscall_id2, |
| "name" : syscall_name, |
| "func" : syscall_func, |
| "params" : syscall_params, |
| "decl" : "%-15s %s (%s);" % (return_type, syscall_func, params) } |
| |
| self.syscalls.append(t) |
| |
| def parse_file(self, file_path): |
| fp = open(file_path) |
| for line in fp.xreadlines(): |
| self.lineno += 1 |
| line = line.strip() |
| if not line: continue |
| if line[0] == '#': continue |
| self.parse_line(line) |
| |
| fp.close() |
| |
| |
| class StringOutput: |
| def __init__(self): |
| self.line = "" |
| |
| def write(self,msg): |
| self.line += msg |
| D2("write '%s'" % msg) |
| |
| def get(self): |
| return self.line |
| |
| |
| def create_file_path(path): |
| dirs = [] |
| while 1: |
| parent = os.path.dirname(path) |
| #print "parent: %s <- %s" % (parent, path) |
| if parent == "/" or parent == "": |
| break |
| dirs.append(parent) |
| path = parent |
| |
| dirs.reverse() |
| for dir in dirs: |
| #print "dir %s" % dir |
| if os.path.isdir(dir): |
| continue |
| os.mkdir(dir) |
| |
| def walk_source_files(paths,callback,args,excludes=[]): |
| """recursively walk a list of paths and files, only keeping the source files in directories""" |
| for path in paths: |
| if len(path) > 0 and path[0] == '@': |
| # this is the name of another file, include it and parse it |
| path = path[1:] |
| if os.path.exists(path): |
| for line in open(path): |
| if len(line) > 0 and line[-1] == '\n': |
| line = line[:-1] |
| walk_source_files([line],callback,args,excludes) |
| continue |
| if not os.path.isdir(path): |
| callback(path,args) |
| else: |
| for root, dirs, files in os.walk(path): |
| #print "w-- %s (ex: %s)" % (repr((root,dirs)), repr(excludes)) |
| if len(excludes): |
| for d in dirs[:]: |
| if os.path.join(root,d) in excludes: |
| dirs.remove(d) |
| for f in files: |
| r, ext = os.path.splitext(f) |
| if ext in [ ".h", ".c", ".cpp", ".S" ]: |
| callback( "%s/%s" % (root,f), args ) |
| |
| def cleanup_dir(path): |
| """create a directory if needed, and ensure that it is totally empty |
| by removing any existing content in it""" |
| if not os.path.exists(path): |
| os.mkdir(path) |
| else: |
| for root, dirs, files in os.walk(path, topdown=False): |
| if root.endswith("kernel_headers/"): |
| # skip 'kernel_headers' |
| continue |
| for name in files: |
| os.remove(os.path.join(root, name)) |
| for name in dirs: |
| os.rmdir(os.path.join(root, name)) |
| |
| def update_file( path, newdata ): |
| """update a file on disk, only if its content has changed""" |
| if os.path.exists( path ): |
| try: |
| f = open( path, "r" ) |
| olddata = f.read() |
| f.close() |
| except: |
| D("update_file: cannot read existing file '%s'" % path) |
| return 0 |
| |
| if oldata == newdata: |
| D2("update_file: no change to file '%s'" % path ) |
| return 0 |
| |
| update = 1 |
| else: |
| try: |
| create_file_path(path) |
| except: |
| D("update_file: cannot create path to '%s'" % path) |
| return 0 |
| |
| f = open( path, "w" ) |
| f.write( newdata ) |
| f.close() |
| |
| return 1 |
| |
| |
| class BatchFileUpdater: |
| """a class used to edit several files at once""" |
| def __init__(self): |
| self.old_files = set() |
| self.new_files = set() |
| self.new_data = {} |
| |
| def readFile(self,path): |
| #path = os.path.realpath(path) |
| if os.path.exists(path): |
| self.old_files.add(path) |
| |
| def readDir(self,path): |
| #path = os.path.realpath(path) |
| for root, dirs, files in os.walk(path): |
| for f in files: |
| dst = "%s/%s" % (root,f) |
| self.old_files.add(dst) |
| |
| def editFile(self,dst,data): |
| """edit a destination file. if the file is not mapped from a source, |
| it will be added. return 0 if the file content wasn't changed, |
| 1 if it was edited, or 2 if the file is new""" |
| #dst = os.path.realpath(dst) |
| result = 1 |
| if os.path.exists(dst): |
| f = open(dst, "r") |
| olddata = f.read() |
| f.close() |
| if olddata == data: |
| self.old_files.remove(dst) |
| return 0 |
| else: |
| result = 2 |
| |
| self.new_data[dst] = data |
| self.new_files.add(dst) |
| return result |
| |
| def getChanges(self): |
| """determine changes, returns (adds, deletes, edits)""" |
| adds = set() |
| edits = set() |
| deletes = set() |
| |
| for dst in self.new_files: |
| if not (dst in self.old_files): |
| adds.add(dst) |
| else: |
| edits.add(dst) |
| |
| for dst in self.old_files: |
| if not dst in self.new_files: |
| deletes.add(dst) |
| |
| return (adds, deletes, edits) |
| |
| def _writeFile(self,dst): |
| if not os.path.exists(os.path.dirname(dst)): |
| create_file_path(dst) |
| f = open(dst, "w") |
| f.write(self.new_data[dst]) |
| f.close() |
| |
| def updateFiles(self): |
| adds, deletes, edits = self.getChanges() |
| |
| for dst in sorted(adds): |
| self._writeFile(dst) |
| |
| for dst in sorted(edits): |
| self._writeFile(dst) |
| |
| for dst in sorted(deletes): |
| os.remove(dst) |
| |
| def updateGitFiles(self): |
| adds, deletes, edits = self.getChanges() |
| |
| if adds: |
| for dst in sorted(adds): |
| self._writeFile(dst) |
| commands.getoutput("git add " + " ".join(adds)) |
| |
| if deletes: |
| commands.getoutput("git rm " + " ".join(deletes)) |
| |
| if edits: |
| for dst in sorted(edits): |
| self._writeFile(dst) |
| commands.getoutput("git add " + " ".join(edits)) |
