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strace
Отслеживание системных вызовов

Тип файла: команда
  Рус  
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, fault, inject, kvm

  • -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
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