doc/man/lttng-crash.1.txt

   1 lttng-crash(1)
   2 ==============
   3 :revdate: 8 April 2021
   4
   5
   6 NAME
   7 ----
   8 lttng-crash - Recover and read LTTng trace buffers in the event of a crash
   9
  10
  11 SYNOPSIS
  12 --------
  13 [verse]
  14 *lttng-crash* [option:--extract='DIR' | option:--viewer='READER'] [option:-verbose]... 'SHMDIR'
  15
  16
  17 DESCRIPTION
  18 -----------
  19 include::common-intro.txt[]
  20
  21 The `lttng-crash` command-line tool recovers LTTng trace buffers in the
  22 event of a system crash.
  23
  24 `lttng-crash` reads files within the directory 'SHMDIR' and does one
  25 of:
  26
  27 Without the option:--extract option::
  28     Launches a trace reader (see the option:--viewer option) to view the
  29     recovered traces.
  30
  31 With the option:--extract='DIR' option::
  32     Extracts the files as uncorrupted LTTng traces to the 'DIR'
  33     directory.
  34
  35 'SHMDIR' is the directory specified as the argument of the
  36 nloption:--shm-path option of the man:lttng-create(1) command used to
  37 create the tracing session for which to recover the traces.
  38
  39
  40 OPTIONS
  41 -------
  42 option:-x 'DIR', option:--extract='DIR'::
  43     Extract recovered traces to the directory 'DIR'; do :not: execute
  44     any trace reader.
  45
  46 option:-v, option:--verbose::
  47     Increase verbosity.
  48 +
  49 Specify this option up to three times to get more levels of verbosity.
  50
  51 option:-e 'READER', option:--viewer='READER'::
  52     Use the trace reader 'READER' to read the trace buffers.
  53 +
  54 'READER' is the absolute path to the reader command to use, and it can
  55 contain command arguments as well. `lttng-crash` passes the trace
  56 directory paths to the 'READER' command as its last arguments.
  57 +
  58 Without this option, `lttng crash` uses man:babeltrace2(1) if it's
  59 available. Otherwise, it tries to use man:babeltrace(1).
  60
  61
  62 Program information
  63 ~~~~~~~~~~~~~~~~~~~
  64 include::common-help-option.txt[]
  65
  66 option:-V, option:--version::
  67     Show version and quit.
  68
  69
  70 EXIT STATUS
  71 -----------
  72 *0*::
  73     Success
  74
  75 *1*::
  76     Error
  77
  78 *3*::
  79     Fatal error
  80
  81
  82 include::common-footer.txt[]
  83
  84
  85 SEE ALSO
  86 --------
  87 man:babeltrace2(1),
  88 man:lttng(1),
  89 man:lttng-create(1),
  90 man:lttng-relayd(8),
  91 man:lttng-sessiond(8),
  92 man:lttng-ust(3)