NAME

       strace-log-merge - merge strace -ff -tt output

SYNOPSIS

       strace-log-merge STRACE_LOG

       strace-log-merge --help

DESCRIPTION

       strace-log-merge  merges log files produced by the strace -ff -tt[t] command.  It prepends the Process ID
       (PID) to each line and sorts the combined output chronologically by timestamp.

OPTIONS

       --help Show program usage and exit.

       STRACE_LOG
              Specifies the file name prefix for the log files produced by a strace  -ff  -tt[t]  command.   The
              utility will read all files matching the STRACE_LOG.* pattern.

EXIT STATUS

       0      Success

       Non-zero
              An  error  occurred.   This  can  be due to a missing argument (in which case usage information is
              printed) or a failure during the processing of the STRACE_LOG.*  files.

USAGE EXAMPLE

       $ strace -o sleepy -ff -tt -e trace=execve,nanosleep \
               sh -c 'sleep 0.1 & sleep 0.2 & sleep 0.3'
       $ strace-log-merge sleepy | fold -w 72 -s
       13475 21:13:52.040837 execve("/bin/sh", ["sh", "-c", "sleep 0.1 & sleep
       0.2 & sleep 0."...], 0x7ffde54b2450 /* 33 vars */) = 0
       13478 21:13:52.044050 execve("/bin/sleep", ["sleep", "0.3"],
       0x5631be4f87a8 /* 33 vars */) = 0
       13476 21:13:52.044269 execve("/bin/sleep", ["sleep", "0.1"],
       0x5631be4f87a8 /* 33 vars */) = 0
       13477 21:13:52.044389 execve("/bin/sleep", ["sleep", "0.2"],
       0x5631be4f87a8 /* 33 vars */) = 0
       13478 21:13:52.046207 nanosleep({tv_sec=0, tv_nsec=300000000}, NULL) = 0
       13476 21:13:52.046303 nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
       13477 21:13:52.046318 nanosleep({tv_sec=0, tv_nsec=200000000}, NULL) = 0
       13476 21:13:52.146852 +++ exited with 0 +++
       13475 21:13:52.146942 --- SIGCHLD {si_signo=SIGCHLD,
       si_code=CLD_EXITED, si_pid=13476, si_uid=1000, si_status=0, si_utime=0,
       si_stime=0} ---
       13477 21:13:52.247782 +++ exited with 0 +++
       13475 21:13:52.247885 --- SIGCHLD {si_signo=SIGCHLD,
       si_code=CLD_EXITED, si_pid=13477, si_uid=1000, si_status=0, si_utime=0,
       si_stime=0} ---
       13478 21:13:52.347680 +++ exited with 0 +++
       13475 21:13:52.347786 --- SIGCHLD {si_signo=SIGCHLD,
       si_code=CLD_EXITED, si_pid=13478, si_uid=1000, si_status=0, si_utime=0,
       si_stime=0} ---
       13475 21:13:52.348069 +++ exited with 0 +++

NOTES

       strace-log-merge may fail to correctly sort logs that were generated with -tt and span  across  midnight.
       This  is because the standard -tt timestamp lacks date information, which is required for proper sorting.
       Using the -ttt option with strace solves this problem, as its timestamp format includes the date.

BUGS

       strace-log-merge does not validate the format of the input files.  It assumes that all files matching the
       STRACE_LOG.*  glob pattern are correctly formatted log files from a single strace session.

HISTORY

       The initial version of strace-log-merge was written by Denys Vlasenko in 2012.

REPORTING BUGS

       Problems   with   strace-log-merge   should   be   reported   to   the    strace    mailing    list    at
       <strace-devel@lists.strace.io>.

SEE ALSO

       strace(1)

strace 6.16                                        2025-07-02                                STRACE-LOG-MERGE(1)