1#!/bin/sh
2#
3# This script processes strace -ff -tt output.  It merges the contents of all
4# STRACE_LOG.PID files and sorts them, printing result on the standard output.
5#
6# Copyright (c) 2012-2017 The strace developers.
7#
8# Redistribution and use in source and binary forms, with or without
9# modification, are permitted provided that the following conditions
10# are met:
11# 1. Redistributions of source code must retain the above copyright
12#    notice, this list of conditions and the following disclaimer.
13# 2. Redistributions in binary form must reproduce the above copyright
14#    notice, this list of conditions and the following disclaimer in the
15#    documentation and/or other materials provided with the distribution.
16# 3. The name of the author may not be used to endorse or promote products
17#    derived from this software without specific prior written permission.
18#
19# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30show_usage()
31{
32	cat <<__EOF__
33Usage: ${0##*/} STRACE_LOG
34
35Finds all STRACE_LOG.PID files, adds PID prefix to every line,
36then combines and sorts them, and prints result to standard output.
37
38It is assumed that STRACE_LOGs were produced by strace with -tt[t]
39option which prints timestamps (otherwise sorting won't do any good).
40__EOF__
41}
42
43dd='\([0-9][0-9]\)'
44ds='\([0-9][0-9]*\)'
45
46if [ $# -ne 1 ]; then
47	show_usage >&2
48	exit 1
49elif [ "$1" = '--help' ]; then
50	show_usage
51	exit 0
52fi
53
54logfile=$1
55
56for file in "$logfile".*; do
57	[ -f "$file" ] || continue
58	suffix=${file#"$logfile".}
59	[ "$suffix" -gt 0 ] 2> /dev/null ||
60		continue
61	pid=$(printf "%-5s" $suffix)
62	# Some strace logs have last line which is not '\n' terminated,
63	# so add extra newline to every file.
64	# grep -v '^$' removes empty lines which may result.
65	sed -n "s/^\($dd:\)\?\($dd:\)\?\($ds\.\)\?$ds /\2\4\6\7 $pid \0/p" < "$file"
66	echo
67done \
68| sort -s -n -k1,1 | sed -n 's/^[0-9][0-9]* //p'
69
70rc=$?
71[ $rc -eq 1 ] &&
72	echo >&2 "${0##*/}: $logfile: strace output not found"
73exit $rc
74