91 lines
1.8 KiB
Bash
Executable File
91 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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#
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# This script processes strace -ff -tt output. It merges the contents of all
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# STRACE_LOG.PID files and sorts them, printing result on the standard output.
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#
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# Copyright (c) 2012-2024 The strace developers.
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#
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# SPDX-License-Identifier: LGPL-2.1-or-later
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show_usage()
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{
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cat <<__EOF__
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Usage: ${0##*/} STRACE_LOG
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Finds all STRACE_LOG.PID files, adds PID prefix to every line,
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then combines and sorts them, and prints result to standard output.
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It is assumed that STRACE_LOGs were produced by strace with -tt[t]
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option which prints timestamps (otherwise sorting won't do any good).
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__EOF__
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}
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dd='\([0-9][0-9]\)'
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ds='\([0-9][0-9]*\)'
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if [ $# -ne 1 ]; then
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show_usage >&2
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exit 1
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elif [ "$1" = '--help' ] || [ "$1" = '-h' ]; then
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show_usage
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exit 0
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fi
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logfile=$1
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iterate_logfiles()
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{
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local file suffix
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for file in "$logfile".*; do
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[ -f "$file" ] || continue
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suffix=${file#"$logfile".}
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[ "$suffix" -gt 0 ] 2> /dev/null ||
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continue
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"$@" "$suffix" "$file"
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done
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}
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max_suffix_length=0
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process_suffix()
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{
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local suffix len
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suffix="$1"; shift
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len=${#suffix}
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if [ $len -gt $max_suffix_length ]; then
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max_suffix_length=$len
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fi
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}
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process_logfile()
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{
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local suffix file pid
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suffix="$1"; shift
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file="$1"; shift
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pid=$(printf "%-*s" $max_suffix_length $suffix)
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# Some strace logs have last line which is not '\n' terminated,
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# so add extra newline to every file.
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# Empty lines are removed later.
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sed -n "s/^\($dd:\)\?\($dd:\)\?\($ds\.\)\?$ds /\2\4\6\7 $pid \0/p" < "$file"
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echo
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}
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iterate_logfiles process_suffix
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[ $max_suffix_length -gt 0 ] || {
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echo >&2 "${0##*/}: $logfile: strace output not found"
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exit 1
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}
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iterate_logfiles process_logfile |
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sort -s -n -k1,1 |
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sed -n 's/^[0-9][0-9]* //p' |
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grep -v '^$'
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rc=$?
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[ $rc -eq 1 ] &&
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echo >&2 "${0##*/}: $logfile.* files do not look like log files produced by 'strace -tt'"
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exit $rc
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