name : strace-log-merge #!/bin/sh # # This script processes strace -ff -tt output. It merges the contents of all # STRACE_LOG.PID files and sorts them, printing result on the standard output. # # Copyright (c) 2012-2021 The strace developers. # # SPDX-License-Identifier: LGPL-2.1-or-later show_usage() { cat <<__EOF__ Usage: ${0##*/} STRACE_LOG Finds all STRACE_LOG.PID files, adds PID prefix to every line, then combines and sorts them, and prints result to standard output. It is assumed that STRACE_LOGs were produced by strace with -tt[t] option which prints timestamps (otherwise sorting won't do any good). __EOF__ } dd='\([0-9][0-9]\)' ds='\([0-9][0-9]*\)' if [ $# -ne 1 ]; then show_usage >&2 exit 1 elif [ "$1" = '--help' ]; then show_usage exit 0 fi logfile=$1 iterate_logfiles() { local file suffix for file in "$logfile".*; do [ -f "$file" ] || continue suffix=${file#"$logfile".} [ "$suffix" -gt 0 ] 2> /dev/null || continue "$@" "$suffix" "$file" done } max_suffix_length=0 process_suffix() { local suffix len suffix="$1"; shift len=${#suffix} if [ $len -gt $max_suffix_length ]; then max_suffix_length=$len fi } process_logfile() { local suffix file pid suffix="$1"; shift file="$1"; shift pid=$(printf "%-*s" $max_suffix_length $suffix) # Some strace logs have last line which is not '\n' terminated, # so add extra newline to every file. # Empty lines are removed later. sed -n "s/^\($dd:\)\?\($dd:\)\?\($ds\.\)\?$ds /\2\4\6\7 $pid \0/p" < "$file" echo } iterate_logfiles process_suffix [ $max_suffix_length -gt 0 ] || { echo >&2 "${0##*/}: $logfile: strace output not found" exit 1 } iterate_logfiles process_logfile | sort -s -n -k1,1 | sed -n 's/^[0-9][0-9]* //p' | grep -v '^$' rc=$? [ $rc -eq 1 ] && echo >&2 "${0##*/}: $logfile: strace output not found" exit $rc