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strace-log-merge: work around corner cases of strace -ttt parsing

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Employing strace -ttt for the logs destined to be fed to
strace-log-merge is ultimately the best solution except for the logs
that pass the following dates:

Thu Jan  1 00:00:09 UTC 1970
Thu Jan  1 00:01:39 UTC 1970
Thu Jan  1 00:16:39 UTC 1970
Thu Jan  1 02:46:39 UTC 1970
Fri Jan  2 03:46:39 UTC 1970
Mon Jan 12 13:46:39 UTC 1970
Sun Apr 26 17:46:39 UTC 1970
Sat Mar  3 09:46:39 UTC 1973
Sun Sep  9 01:46:39 UTC 2001
Sat Nov 20 17:46:39 UTC 2286
Wed Nov 16 09:46:39 UTC 5138
Fri Sep 27 01:46:39 UTC 33658
Sun May 20 17:46:39 UTC 318857
Sat Nov  7 09:46:39 UTC 3170843
Sun Jul  5 01:46:39 UTC 31690708
Sat Jan 25 17:46:39 UTC 316889355

Let's lift this limitation.

* strace-log-merge: Generate numeric-only key for sorting, use sort -n
option.
This commit is contained in:
Eugene Syromyatnikov 2017-11-30 02:14:14 +01:00
parent b0c8e3bc4d
commit b053dd53ed
1 changed files with 5 additions and 2 deletions
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7
strace-log-merge
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@ -40,6 +40,9 @@ option which prints timestamps (otherwise sorting won't do any good).
__EOF__
}
dd='\([0-9][0-9]\)'
ds='\([0-9][0-9]*\)'
if [ $# -ne 1 ]; then
show_usage >&2
exit 1
@ -59,10 +62,10 @@ for file in "$logfile".*; do
# Some strace logs have last line which is not '\n' terminated,
# so add extra newline to every file.
# grep -v '^$' removes empty lines which may result.
sed "s/^/$pid /" < "$file"
sed -n "s/^\($dd:\)\?\($dd:\)\?\($ds\.\)\?$ds /\2\4\6\7 $pid \0/p" < "$file"
echo
done \
| sort -s -k2,2 | grep -v '^$'
| sort -s -n -k1,1 | sed -n 's/^[0-9][0-9]* //p'
rc=$?
[ $rc -eq 1 ] &&