doc/COPYING: add one for the "or later" bit

[djbdns-logparse.git] / bin / djbdns-logparse

diff --git a/bin/djbdns-logparse b/bin/djbdns-logparse
index 7808fbd99a5042a9adc31828933949325561585e..2c88462bd2ec479753ad5030f7e6da0859c1aa4d 100755 (executable)
--- a/bin/djbdns-logparse
+++ b/bin/djbdns-logparse
@@ -2,6 +2,10 @@
 r"""
 Convert tinydns and dnscache logs to human-readable form
 """
+# Avoid clobbering the top-level exit() built-in.
+import sys
+
+from signal import signal, SIGINT
 from argparse import ArgumentParser, FileType
 from djbdns.io import parse_logfile
 
@@ -11,12 +15,11 @@ parser = ArgumentParser(description = __doc__)
 
 # Parse zero or more positional arguments into a list of
 # "logfiles". If none are given, read from stdin instead.
-from sys import stdin
 parser.add_argument("logfiles",
                     metavar="LOGFILE",
                     type=FileType("r"),
                     nargs="*",
-                    default=[stdin],
+                    default=[sys.stdin],
                     help="djbdns logfile to process (default: stdin)")
 
 # Warning: argparse automatically opens its file arguments here,
@@ -29,5 +32,11 @@ parser.add_argument("logfiles",
 #
 # So anyway, don't run this on several million logfiles.
 args = parser.parse_args()
+
+# Install a SIGINT handler so thst we don't spit out a stack trace when
+# the user accidentally starts the program with no arguments and then
+# hits Ctrl-C to kill it.
+signal(SIGINT, lambda s,f: sys.exit(0))
+
 for f in args.logfiles:
     parse_logfile(f)