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Server/py: Add atomic writing to record().
author
Christian Heller
<c.heller@plomlompom.de>
Sun, 22 Feb 2015 10:28:33 +0000
(11:28 +0100)
committer
Christian Heller
<c.heller@plomlompom.de>
Sun, 22 Feb 2015 10:28:33 +0000
(11:28 +0100)
plomrogue-server.py
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diff --git
a/plomrogue-server.py
b/plomrogue-server.py
index 568b21cf4db9b00c9caf4beeb55c798a90f37aae..47390a4dffdb14056a7975404810688c485b64b6 100755
(executable)
--- a/
plomrogue-server.py
+++ b/
plomrogue-server.py
@@
-2,6
+2,7
@@
import argparse
import errno
import os
import shlex
import errno
import os
import shlex
+import shutil
import time
import time
@@
-71,17
+72,23
@@
def obey(cmd, io_db, prefix):
raise SystemExit("received QUIT command")
elif "MAKE_WORLD" == tokens[0] and 2 == len(tokens):
print("I would generate a new world now, if only I knew how.")
raise SystemExit("received QUIT command")
elif "MAKE_WORLD" == tokens[0] and 2 == len(tokens):
print("I would generate a new world now, if only I knew how.")
- record(cmd, io_db
["path_record"]
)
+ record(cmd, io_db)
else:
print("Invalid command/argument, or bad number of tokens.")
else:
print("Invalid command/argument, or bad number of tokens.")
-def record(cmd,
path_recordfile
):
+def record(cmd,
io_db
):
"""Append cmd string plus newline to file at path_recordfile."""
# Doesn't yet replace old record() fully.
"""Append cmd string plus newline to file at path_recordfile."""
# Doesn't yet replace old record() fully.
- file = open(path_recordfile, "a")
+ path_tmp = io_db["path_record"] + io_db["tmp_suffix"]
+ if os.access(io_db["path_record"], os.F_OK):
+ shutil.copyfile(io_db["path_record"], path_tmp)
+ file = open(path_tmp, "a")
file.write(cmd + "\n")
file.write(cmd + "\n")
+ file.flush()
+ os.fsync(file.fileno())
file.close()
file.close()
+ os.rename(path_tmp, io_db["path_record"])
def obey_lines_in_file(path, name):
def obey_lines_in_file(path, name):