SYSTEMD-CAT(1)systemd-catSYSTEMD-CAT(1)NAMEsystemd-cat - Connect a pipeline or program's output with the journal
SYNOPSISsystemd-cat [OPTIONS...] [COMMAND] [ARGUMENTS...]
systemd-cat [OPTIONS...]
DESCRIPTIONsystemd-cat may be used to connect STDOUT and STDERR of a process with
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.
OPTIONS
The following options are understood:
--h, --help
Prints a short help text and exits.
--version
Prints a short version string and exits.
-t, --identifier=
Specify a short string that is used to identify the logging tool.
If not specified no identifying 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, resp.
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.
--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.
EXIT STATUS
On success 0 is returned, a non-zero failure code otherwise.
EXAMPLES
Example 1. Invoke a program
This calls /bin/ls with STDOUT/STDERR 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.
SEE ALSOsystemd(1), systemctl(1), logger(1)AUTHOR
Lennart Poettering <lennart@poettering.net>
Developer
systemd 02/15/2013 SYSTEMD-CAT(1)