(refroot)$ strace -V
strace -- version 4.12
(refroot)$ strace --trace=%file,%desc
strace: invalid option -- '-'
Try 'strace -h' for more information.
(refroot)$ strace -h
usage: strace [-CdffhiqrtttTvVwxxy] [-I n] [-e expr]...
              [-a column] [-o file] [-s strsize] [-P path]...
              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]
   or: strace -c[dfw] [-I n] [-e expr]... [-O overhead] [-S sortby]
              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]

Output format:
  -a column      alignment COLUMN for printing syscall results (default 40)
  -i             print instruction pointer at time of syscall
  -o file        send trace output to FILE instead of stderr
  -q             suppress messages about attaching, detaching, etc.
  -r             print relative timestamp
  -s strsize     limit length of print strings to STRSIZE chars (default 32)
  -t             print absolute timestamp
  -tt            print absolute timestamp with usecs
  -T             print time spent in each syscall
  -x             print non-ascii strings in hex
  -xx            print all strings in hex
  -y             print paths associated with file descriptor arguments
  -yy            print protocol specific information associated with socket file descriptors

Statistics:
  -c             count time, calls, and errors for each syscall and report summary
  -C             like -c but also print regular output
  -O overhead    set overhead for tracing syscalls to OVERHEAD usecs
  -S sortby      sort syscall counts by: time, calls, name, nothing (default time)
  -w             summarise syscall latency (default is system time)

Filtering:
  -e expr        a qualifying expression: option=[!]all or option=[!]val1[,val2]...
     options:    trace, abbrev, verbose, raw, signal, read, write
  -P path        trace accesses to path

Tracing:
  -b execve      detach on execve syscall
  -D             run tracer process as a detached grandchild, not as parent
  -f             follow forks
  -ff            follow forks with output into separate files
  -I interruptible
     1:          no signals are blocked
     2:          fatal signals are blocked while decoding syscall (default)
     3:          fatal signals are always blocked (default if '-o FILE PROG')
     4:          fatal signals and SIGTSTP (^Z) are always blocked
                 (useful to make 'strace -o FILE PROG' not stop on ^Z)

Startup:
  -E var         remove var from the environment for command
  -E var=val     put var=val in the environment for command
  -p pid         trace process with process id PID, may be repeated
  -u username    run command as username handling setuid and/or setgid

Miscellaneous:
  -d             enable debug output to stderr
  -v             verbose mode: print unabbreviated argv, stat, termios, etc. args
  -h             print help message
  -V             print version

(refroot)$ python3.14 -m test test_fileio -v
== CPython 3.14.0b1 (main, May 8 2025, 10:45:27) [Clang 20.1.0 ]
== Linux-3.10.0-957.35.2.el7.x86_64-x86_64-with-glibc2.17 little-endian
== Python build: release shared
== cwd: /bb/data/tmp/test_python_worker_50669æ
== CPU count: 15 (process) / 16 (system)
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 4196976212
0:00:00 load avg: 4.96 Run 1 test sequentially in a single process
0:00:00 load avg: 4.96 [1/1] test_fileio
test_fileio skipped -- need strace 5.5 or newer, found strace 4.12
0:00:00 load avg: 4.96 [1/1] test_fileio skipped

== Tests result: SUCCESS ==

1 test skipped:
    test_fileio

Total duration: 66 ms
Total tests: run=0
Total test files: run=1/1 skipped=1
Result: SUCCESS