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   systemd-cat    ( 1 )

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Имя (Name)

systemd-cat - Connect a pipeline or program's output with the journal

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Синопсис (Synopsis)

systemd-cat [OPTIONS...] [COMMAND] [ARGUMENTS...]

systemd-cat [OPTIONS...]

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Описание (Description)

systemd-cat may be used to connect the standard input and output of a process to the journal, or as a filter tool in a shell pipeline to pass the output the previous pipeline element generates to the journal.

If no parameter is passed, systemd-cat will write everything it reads from standard input (stdin) to the journal.

If parameters are passed, they are executed as command line with standard output (stdout) and standard error output (stderr) connected to the journal, so that all it writes is stored in the journal.

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Параметры (Options)

The following options are understood:

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       -t, --identifier=
           Specify a short string that is used to identify the logging
           tool. If not specified, no identification string is written
           to the journal.

       -p, --priority=
           Specify the default priority level for the logged messages.
           Pass one of "emerg", "alert", "crit", "err", "warning",
           "notice", "info", "debug", or a value between 0 and 7
           (corresponding to the same named levels). These priority
           values are the same as defined by syslog(3). Defaults to
           "info". Note that this simply controls the default,
           individual lines may be logged with different levels if they
           are prefixed accordingly. For details, see --level-prefix=
           below.

       --stderr-priority=
           Specifies the default priority level for messages from the
           process's standard error output (stderr). Usage of this
           option is the same as the --priority= option, above, and both
           can be used at once. When both are used, --priority= will
           specify the default priority for standard output (stdout).

           If --stderr-priority= is not specified, messages from stderr
           will still be logged, with the same default priority level as
           stdout.

           Also, note that when stdout and stderr use the same default
           priority, the messages will be strictly ordered, because one
           channel is used for both. When the default priority differs,
           two channels are used, and so stdout messages will not be
           strictly ordered with respect to stderr messages - though
           they will tend to be approximately ordered.

       --level-prefix=
           Controls whether lines read are parsed for syslog priority
           level prefixes. If enabled (the default), a line prefixed
           with a priority prefix such as "<5>" is logged at priority 5
           ("notice"), and similar for the other priority levels. Takes
           a boolean argument.

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Статус выхода (Exit)

On success, 0 is returned, a non-zero failure code otherwise.

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Примеры (Examples)

Example 1. Invoke a program

       This calls /bin/ls with standard output and error connected to
       the journal:

           # systemd-cat ls

       Example 2. Usage in a shell pipeline

       This builds a shell pipeline also invoking /bin/ls and writes the
       output it generates to the journal:

           # ls | systemd-cat

       Even though the two examples have very similar effects the first
       is preferable since only one process is running at a time, and
       both stdout and stderr are captured while in the second example,
       only stdout is captured.

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Смотри также (See also)

systemd(1), systemctl(1), logger(1)

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