--- /dev/null
+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd-cat">
+
+ <refentryinfo>
+ <title>systemd-cat</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-cat</refentrytitle>
+ <manvolnum>1</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-cat</refname>
+ <refpurpose>Connect a pipeline or program's output with the journal</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg> <arg>COMMAND</arg> <arg choice="opt" rep="repeat">ARGUMENTS</arg></command>
+ </cmdsynopsis>
+ <cmdsynopsis>
+ <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg></command>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>systemd-cat</command> 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.</para>
+
+ <para>If no parameter is passed
+ <command>systemd-command</command> will write
+ everything it reads from standard input (STDIN) to the journal.</para>
+
+ <para>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.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>The following options are understood:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><option>--h</option></term>
+ <term><option>--help</option></term>
+
+ <listitem><para>Prints a short help
+ text and exits.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--version</option></term>
+
+ <listitem><para>Prints a short version
+ string and exits.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-t</option></term>
+ <term><option>--identifier=</option></term>
+
+ <listitem><para>Specify a short string
+ that is used to identify the logging
+ tool. If not specified no identifying
+ string is written to the journal.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-p</option></term>
+ <term><option>--priority=</option></term>
+
+ <listitem><para>Specify the default
+ priority level for the logged
+ messages. Pass one of
+ <literal>emerg</literal>,
+ <literal>alert</literal>,
+ <literal>crit</literal>,
+ <literal>err</literal>,
+ <literal>warning</literal>,
+ <literal>notice</literal>,
+ <literal>info</literal>,
+ <literal>debug</literal>, resp. a
+ value between 0 and 7 (corresponding
+ to the same named levels). These
+ priority values are the same as
+ defined by
+ <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>. Defaults
+ to <literal>info</literal>. Note that
+ this simply controls the default,
+ individual lines may be logged with
+ different levels if they are prefixed
+ accordingly. For details see
+ <option>--level-prefix=</option>
+ below.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--level-prefix=</option></term>
+
+ <listitem><para>Controls whether lines
+ read are parsed for syslog priority
+ level prefixes. If enabled (the
+ default) a line prefixed with a
+ priority prefix such as
+ <literal><5></literal> is logged
+ at priority 5
+ (<literal>notice</literal>), and
+ similar for the other priority
+ levels. Takes a boolean
+ argument.</para></listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Exit status</title>
+
+ <para>On success 0 is returned, a non-zero failure
+ code otherwise.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Examples</title>
+
+ <example>
+ <title>Invoke a program</title>
+
+ <para>This calls <filename>/bin/ls</filename>
+ with STDOUT/STDERR connected to the
+ journal:</para>
+
+ <programlisting># systemd-cat ls</programlisting>
+ </example>
+
+ <example>
+ <title>Usage in a shell pipeline</title>
+
+ <para>This builds a shell pipeline also
+ invoking <filename>/bin/ls</filename> and
+ writes the output it generates to the
+ journal:</para>
+
+ <programlisting># ls | systemd-cat</programlisting>
+ </example>
+
+ <para>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.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>logger</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
- { "version" , no_argument, NULL, ARG_VERSION },
+ { "version", no_argument, NULL, ARG_VERSION },
{ "identifier", required_argument, NULL, 't' },
{ "priority", required_argument, NULL, 'p' },
{ "level-prefix", required_argument, NULL, ARG_LEVEL_PREFIX },
fd = sd_journal_stream_fd(arg_identifier, arg_priority, arg_level_prefix);
if (fd < 0) {
- log_error("Failed to create stream fd: %s", strerror(fd));
+ log_error("Failed to create stream fd: %s", strerror(-fd));
r = fd;
goto finish;
}
if (dup3(fd, STDOUT_FILENO, 0) < 0 ||
dup3(fd, STDERR_FILENO, 0) < 0) {
- log_error("Failed to duplicate fd: %s", strerror(fd));
+ log_error("Failed to duplicate fd: %m");
r = -errno;
goto finish;
}
else
execvp(argv[optind], argv + optind);
+ r = -errno;
+
/* Let's try to restore a working stderr, so we can print the error message */
if (saved_stderr >= 0)
dup3(saved_stderr, STDERR_FILENO, 0);
- log_error("Failed to execute process: %m");
- r = -errno;
+ log_error("Failed to execute process: %s", strerror(-r));
finish:
if (fd >= 0)
#include "util.h"
#include "log.h"
#include "sd-readahead.h"
+#include "build.h"
static bool arg_ready = false;
static pid_t arg_pid = 0;
printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
"Notify the init system about service status updates.\n\n"
" -h --help Show this help\n"
+ " --version Show package version\n"
" --ready Inform the init system about service start-up completion\n"
" --pid[=PID] Set main pid of daemon\n"
" --status=TEXT Set status text\n"
enum {
ARG_READY = 0x100,
+ ARG_VERSION,
ARG_PID,
ARG_STATUS,
ARG_BOOTED,
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
{ "ready", no_argument, NULL, ARG_READY },
{ "pid", optional_argument, NULL, ARG_PID },
{ "status", required_argument, NULL, ARG_STATUS },
help();
return 0;
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(DISTRIBUTION);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
case ARG_READY:
arg_ready = true;
break;
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