From: Daira Hopwood Date: Fri, 17 Apr 2015 18:40:37 +0000 (+0100) Subject: Changes to fileutil. X-Git-Url: https://git.rkrishnan.org/components/com_hotproperty/%22doc.html/...?a=commitdiff_plain;h=22636cc51a4f0186bea43c394d7e69ee68fddd56;p=tahoe-lafs%2Ftahoe-lafs.git Changes to fileutil. Signed-off-by: Daira Hopwood --- diff --git a/src/allmydata/node.py b/src/allmydata/node.py index 9ebb3787..8d1ca15e 100644 --- a/src/allmydata/node.py +++ b/src/allmydata/node.py @@ -308,11 +308,11 @@ class Node(service.MultiService): fileutil.write(privpath, value, mode="") return value - def write_config(self, name, value, mode="w"): + def write_config(self, name, value, mode=""): """Write a string to a config file.""" fn = os.path.join(self.basedir, name) try: - fileutil.write(fn, value, mode) + fileutil.write(fn, value, mode=mode) except EnvironmentError, e: self.log("Unable to write config file '%s'" % fn) self.log(e) diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py index f4ab1339..beb1d232 100644 --- a/src/allmydata/util/fileutil.py +++ b/src/allmydata/util/fileutil.py @@ -2,7 +2,7 @@ Futz with files like a pro. """ -import sys, exceptions, os, stat, tempfile, time, binascii +import errno, sys, exceptions, os, re, stat, tempfile, time, binascii from twisted.python import log @@ -174,10 +174,12 @@ def rm_dir(dirname): else: remove(fullname) os.rmdir(dirname) - except Exception, le: - # Ignore "No such file or directory" - if (not isinstance(le, OSError)) or le.args[0] != 2: + except EnvironmentError, le: + # Ignore "No such file or directory", collect any other exception. + if (le.args[0] != 2 and le.args[0] != 3) or (le.args[0] != errno.ENOENT): excs.append(le) + except Exception, le: + excs.append(le) # Okay, now we've recursively removed everything, ignoring any "No # such file or directory" errors, and collecting any other errors. @@ -189,13 +191,39 @@ def rm_dir(dirname): raise OSError, "Failed to remove dir for unknown reason." raise OSError, excs - def remove_if_possible(f): try: remove(f) except: pass +def rmdir_if_empty(path): + """ Remove the directory if it is empty. """ + try: + os.rmdir(path) + except OSError, e: + if e.errno != errno.ENOTEMPTY: + raise + + +ASCII = re.compile(r'^[\x00-\x7F]*$') + +def listdir(path, filter=ASCII): + try: + children = os.listdir(path) + except OSError, e: + if e.errno != errno.ENOENT: + raise + return [] + else: + return [str(child) for child in children if filter.match(child)] + +def open_or_create(fname, binarymode=True): + try: + return open(fname, binarymode and "r+b" or "r+") + except EnvironmentError: + return open(fname, binarymode and "w+b" or "w+") + def du(basedir): size = 0 @@ -221,8 +249,8 @@ def write_atomically(target, contents, mode="b"): f.close() move_into_place(target+".tmp", target) -def write(path, data, mode="wb"): - wf = open(path, mode) +def write(path, data, mode="b"): + wf = open(path, "w"+mode) try: wf.write(data) finally: @@ -542,8 +570,8 @@ def get_used_space(path): # [in] 512-byte units." It is also defined that way on MacOS X. Python does # not set the attribute on Windows. # - # We consider platforms that define st_blocks but give it a wrong value, or - # measure it in a unit other than 512 bytes, to be broken. See also + # This code relies on the underlying platform to either define st_blocks in + # units of 512 bytes or else leave st_blocks undefined. See also # . if hasattr(s, 'st_blocks'):