--- /dev/null
+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<!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 elogind.
+
+ Copyright 2016 Lennart Poettering
+
+ elogind is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ elogind 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with elogind; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="elogind-mount"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>elogind-mount</title>
+ <productname>elogind</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>elogind-mount</refentrytitle>
+ <manvolnum>1</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>elogind-mount</refname>
+ <refpurpose>Establish a mount or auto-mount point transiently</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>elogind-mount</command>
+ <arg choice="opt" rep="repeat"><replaceable>OPTIONS</replaceable></arg>
+ <arg choice="plain"><replaceable>WHAT</replaceable></arg>
+ <arg choice="opt"><replaceable>WHERE</replaceable></arg>
+ </cmdsynopsis>
+ <cmdsynopsis>
+ <command>elogind-mount</command>
+ <arg choice="opt" rep="repeat"><replaceable>OPTIONS</replaceable></arg>
+ <arg choice="plain"><option>--list</option></arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>elogind-mount</command> may be used to create and start a transient <filename>.mount</filename> or
+ <filename>.automount</filename> unit of the file system <replaceable>WHAT</replaceable> on the mount point
+ <replaceable>WHERE</replaceable>.</para>
+
+ <para>In many ways, <command>elogind-mount</command> is similar to the lower-level
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry> command, however instead
+ of executing the mount operation directly and immediately, <command>elogind-mount</command> schedules it through
+ the service manager job queue, so that it may pull in further dependencies (such as parent mounts, or a file system
+ checker to execute a priori), and may make use of the auto-mounting logic.</para>
+
+ <para>The command takes either one or two arguments. If only one argument is specified it should refer to a block
+ device containing a file system (e.g. <literal>/dev/sdb1</literal>), which is then probed for a label and other
+ metadata, and is mounted to a directory whose name is generated from the label. In this mode the block device must
+ exist at the time of invocation of the command, so that it may be probed. If the device is found to be a removable
+ block device (e.g. a USB stick) an automount point instead of a regular mount point is created (i.e. the
+ <option>--automount=</option> option is implied, see below).</para>
+
+ <para>If two arguments are specified the first indicates the mount source (the <replaceable>WHAT</replaceable>) and
+ the second indicates the path to mount it on (the <replaceable>WHERE</replaceable>). In this mode no probing of the
+ source is attempted, and a backing device node doesn't have to exist yet. However, if this mode is combined with
+ <option>--discover</option>, device node probing for additional metadata is enabled, and – much like in the
+ single-argument case discussed above – the specified device has to exist at the time of invocation of the
+ command.</para>
+
+ <para>Use the <option>--list</option> command to show a terse table of all local, known block devices with file
+ systems that may be mounted with this command.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>The following options are understood:</para>
+
+ <variablelist>
+
+ <varlistentry>
+ <term><option>--no-block</option></term>
+
+ <listitem>
+ <para>Do not synchronously wait for the requested operation to finish. If this is not specified, the job will
+ be verified, enqueued and <command>elogind-mount</command> will wait until the mount or automount unit's
+ start-up is completed. By passing this argument, it is only verified and enqueued.</para>
+ </listitem>
+ </varlistentry>
+
+ <xi:include href="standard-options.xml" xpointer="no-pager"/>
+ <xi:include href="standard-options.xml" xpointer="no-ask-password"/>
+
+ <varlistentry>
+ <term><option>--quiet</option></term>
+ <term><option>-q</option></term>
+
+ <listitem><para>Suppresses additional informational output while running.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--discover</option></term>
+
+ <listitem><para>Enable probing of the mount source. This switch is implied if a single argument is specified on
+ the command line. If passed, additional metadata is read from the device to enhance the unit to create. For
+ example, a descriptive string for the transient units is generated from the file system label and device
+ model. Moreover if a removable block device (e.g. USB stick) is detected an automount unit instead of a regular
+ mount unit is created, with a short idle time-out, in order to ensure the file-system is placed in a clean
+ state quickly after each access.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--type=</option></term>
+ <term><option>-t</option></term>
+
+ <listitem><para>Specifies the file system type to mount (e.g. <literal>vfat</literal>, <literal>ext4</literal>,
+ …). If omitted (or set to <literal>auto</literal>) the file system is determined automatically.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--options=</option></term>
+ <term><option>-o</option></term>
+
+ <listitem><para>Additional mount options for the mount point.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--fsck=</option></term>
+
+ <listitem><para>Takes a boolean argument, defaults to on. Controls whether to run a file system check
+ immediately before the mount operation. In the automount case (see <option>--automount=</option> below) the
+ check will be run the moment the first access to the device is made, which might slightly delay the
+ access.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--description=</option></term>
+
+ <listitem><para>Provide a description for the mount or automount unit. See <varname>Description=</varname> in
+ <citerefentry><refentrytitle>elogind.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--property=</option></term>
+ <term><option>-p</option></term>
+
+ <listitem><para>Sets a unit property for the mount unit that is created. This takes an assignment in the same
+ format as <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+ <command>set-property</command> command.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--automount=</option></term>
+
+ <listitem><para>Takes a boolean argument. Controls whether to create an automount point or a regular mount
+ point. If true an automount point is created that is backed by the actual file system at the time of first
+ access. If false a plain mount point is created that is backed by the actual file system immediately. Automount
+ points have the benefit that the file system stays unmounted and hence in clean state until it is first
+ accessed. In automount mode the <option>--timeout-idle-sec=</option> switch (see below) may be used to ensure
+ the mount point is unmounted automatically after the last access and an idle period passed.</para>
+
+ <para>If this switch is not specified it defaults to false. If not specified and <option>--discover</option> is
+ used (or only a single argument passed, which implies <option>--discover</option>, see above), and the file
+ system block device is detected to be removable, it is set to true, in order to increase the chance that the
+ file system is in a fully clean state if the device is unplugged abruptly.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-A</option></term>
+
+ <listitem><para>Equivalent to <option>--automount=yes</option>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--timeout-idle-sec=</option></term>
+
+ <listitem><para>Takes a time value that controls the idle timeout in automount mode. If set to
+ <literal>infinity</literal> (the default) no automatic unmounts are done. Otherwise the file system backing the
+ automount point is detached after the last access and the idle timeout passed. See
+ <citerefentry><refentrytitle>elogind.time</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details on
+ the time syntax supported. This option has no effect if only a regular mount is established, and automounting
+ is not used.</para>
+
+ <para>Note that if <option>--discover</option> is used (or only a single argument passed, which implies
+ <option>--discover</option>, see above), and the file system block device is detected to be removable,
+ <option>--timeout-idle-sec=1s</option> is implied.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--automount-property=</option></term>
+
+ <listitem><para>Similar to <option>--property=</option>, but applies additional properties to the automount
+ unit created, instead of the mount unit.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--bind-device=</option></term>
+
+ <listitem><para>Takes a boolean argument, defaults to off. This option only has an effect in automount mode,
+ and controls whether the automount unit shall be bound to the backing device's lifetime. If enabled, the
+ automount point will be removed automatically when the backing device vanishes. If disabled the automount point
+ stays around, and subsequent accesses will block until backing device is replugged. This option has no effect
+ in case of non-device mounts, such as network or virtual file system mounts.</para>
+
+ <para>Note that if <option>--discover</option> is used (or only a single argument passed, which implies
+ <option>--discover</option>, see above), and the file system block device is detected to be removable, this
+ option is implied.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--list</option></term>
+
+ <listitem><para>Instead of establishing a mount or automount point, print a terse list of block devices
+ containing file systems that may be mounted with <literal>elogind-mount</literal>, along with useful metadata
+ such as labels, etc.</para></listitem>
+ </varlistentry>
+
+ <xi:include href="user-system-options.xml" xpointer="user" />
+ <xi:include href="user-system-options.xml" xpointer="system" />
+ <xi:include href="user-system-options.xml" xpointer="host" />
+ <xi:include href="user-system-options.xml" xpointer="machine" />
+
+ <xi:include href="standard-options.xml" xpointer="help" />
+ <xi:include href="standard-options.xml" xpointer="version" />
+ </variablelist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Exit status</title>
+
+ <para>On success, 0 is returned, a non-zero failure
+ code otherwise.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>The udev Database</title>
+
+ <para>If <option>--discover</option> is used, <command>elogind-mount</command> honours a couple of additional udev
+ properties of block devices:</para>
+
+ <variablelist class='udev-directives'>
+ <varlistentry>
+ <term><varname>SYSTEMD_MOUNT_OPTIONS=</varname></term>
+
+ <listitem><para>The mount options to use, if <option>--options=</option> is not used.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>SYSTEMD_MOUNT_WHERE=</varname></term>
+
+ <listitem><para>The file system path to place the mount point at, instead of the automatically generated
+ one.</para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>elogind.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>elogind.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>elogind.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>elogind-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
--- /dev/null
+/***
+ This file is part of elogind.
+
+ Copyright 2016 Lennart Poettering
+
+ elogind is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ elogind 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with elogind; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <getopt.h>
+
+#include "libudev.h"
+#include "sd-bus.h"
+
+#include "bus-error.h"
+#include "bus-unit-util.h"
+#include "bus-util.h"
+#include "escape.h"
+#include "fstab-util.h"
+#include "pager.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "spawn-polkit-agent.h"
+#include "strv.h"
+#include "udev-util.h"
+#include "unit-name.h"
+#include "terminal-util.h"
+
+enum {
+ ACTION_DEFAULT,
+ ACTION_MOUNT,
+ ACTION_AUTOMOUNT,
+ ACTION_LIST,
+} arg_action = ACTION_DEFAULT;
+
+static bool arg_no_block = false;
+static bool arg_no_pager = false;
+static bool arg_ask_password = true;
+static bool arg_quiet = false;
+static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
+static bool arg_user = false;
+static const char *arg_host = NULL;
+static bool arg_discover = false;
+static char *arg_mount_what = NULL;
+static char *arg_mount_where = NULL;
+static char *arg_mount_type = NULL;
+static char *arg_mount_options = NULL;
+static char *arg_description = NULL;
+static char **arg_property = NULL;
+static usec_t arg_timeout_idle = USEC_INFINITY;
+static bool arg_timeout_idle_set = false;
+static char **arg_automount_property = NULL;
+static int arg_bind_device = -1;
+static bool arg_fsck = true;
+
+static void polkit_agent_open_if_enabled(void) {
+
+ /* Open the polkit agent as a child process if necessary */
+ if (!arg_ask_password)
+ return;
+
+ if (arg_transport != BUS_TRANSPORT_LOCAL)
+ return;
+
+ polkit_agent_open();
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...] WHAT [WHERE]\n\n"
+ "Establish a mount or auto-mount point transiently.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --no-block Do not wait until operation finished\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-ask-password Do not prompt for password\n"
+ " -q --quiet Suppress information messages during runtime\n"
+ " --user Run as user unit\n"
+ " -H --host=[USER@]HOST Operate on remote host\n"
+ " -M --machine=CONTAINER Operate on local container\n"
+ " --discover Discover mount device metadata\n"
+ " -t --type=TYPE File system type\n"
+ " -o --options=OPTIONS Mount options\n"
+ " --fsck=no Don't run file system check before mount\n"
+ " --description=TEXT Description for unit\n"
+ " -p --property=NAME=VALUE Set mount unit property\n"
+ " -A --automount=BOOL Create an auto-mount point\n"
+ " --timeout-idle-sec=SEC Specify automount idle timeout\n"
+ " --automount-property=NAME=VALUE\n"
+ " Set automount unit property\n"
+ " --bind-device Bind automount unit to device\n"
+ " --list List mountable block devices\n"
+ , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_BLOCK,
+ ARG_NO_PAGER,
+ ARG_NO_ASK_PASSWORD,
+ ARG_USER,
+ ARG_SYSTEM,
+ ARG_DISCOVER,
+ ARG_MOUNT_TYPE,
+ ARG_MOUNT_OPTIONS,
+ ARG_FSCK,
+ ARG_DESCRIPTION,
+ ARG_TIMEOUT_IDLE,
+ ARG_AUTOMOUNT,
+ ARG_AUTOMOUNT_PROPERTY,
+ ARG_BIND_DEVICE,
+ ARG_LIST,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-block", no_argument, NULL, ARG_NO_BLOCK },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
+ { "quiet", no_argument, NULL, 'q' },
+ { "user", no_argument, NULL, ARG_USER },
+ { "system", no_argument, NULL, ARG_SYSTEM },
+ { "host", required_argument, NULL, 'H' },
+ { "machine", required_argument, NULL, 'M' },
+ { "discover", no_argument, NULL, ARG_DISCOVER },
+ { "type", required_argument, NULL, 't' },
+ { "options", required_argument, NULL, 'o' },
+ { "description", required_argument, NULL, ARG_DESCRIPTION },
+ { "property", required_argument, NULL, 'p' },
+ { "automount", required_argument, NULL, ARG_AUTOMOUNT },
+ { "timeout-idle-sec", required_argument, NULL, ARG_TIMEOUT_IDLE },
+ { "automount-property", required_argument, NULL, ARG_AUTOMOUNT_PROPERTY },
+ { "bind-device", no_argument, NULL, ARG_BIND_DEVICE },
+ { "list", no_argument, NULL, ARG_LIST },
+ {},
+ };
+
+ int r, c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:A", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_NO_BLOCK:
+ arg_no_block = true;
+ break;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case ARG_NO_ASK_PASSWORD:
+ arg_ask_password = false;
+ break;
+
+ case 'q':
+ arg_quiet = true;
+ break;
+
+ case ARG_USER:
+ arg_user = true;
+ break;
+
+ case ARG_SYSTEM:
+ arg_user = false;
+ break;
+
+ case 'H':
+ arg_transport = BUS_TRANSPORT_REMOTE;
+ arg_host = optarg;
+ break;
+
+ case 'M':
+ arg_transport = BUS_TRANSPORT_MACHINE;
+ arg_host = optarg;
+ break;
+
+ case ARG_DISCOVER:
+ arg_discover = true;
+ break;
+
+ case 't':
+ if (free_and_strdup(&arg_mount_type, optarg) < 0)
+ return log_oom();
+ break;
+
+ case 'o':
+ if (free_and_strdup(&arg_mount_options, optarg) < 0)
+ return log_oom();
+ break;
+
+ case ARG_FSCK:
+ r = parse_boolean(optarg);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse --fsck= argument: %s", optarg);
+
+ arg_fsck = r;
+ break;
+
+ case ARG_DESCRIPTION:
+ if (free_and_strdup(&arg_description, optarg) < 0)
+ return log_oom();
+ break;
+
+ case 'p':
+ if (strv_extend(&arg_property, optarg) < 0)
+ return log_oom();
+
+ break;
+
+ case 'A':
+ arg_action = ACTION_AUTOMOUNT;
+ break;
+
+ case ARG_AUTOMOUNT:
+ r = parse_boolean(optarg);
+ if (r < 0)
+ return log_error_errno(r, "--automount= expects a valid boolean parameter: %s", optarg);
+
+ arg_action = r ? ACTION_AUTOMOUNT : ACTION_MOUNT;
+ break;
+
+ case ARG_TIMEOUT_IDLE:
+ r = parse_sec(optarg, &arg_timeout_idle);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse timeout: %s", optarg);
+
+ break;
+
+ case ARG_AUTOMOUNT_PROPERTY:
+ if (strv_extend(&arg_automount_property, optarg) < 0)
+ return log_oom();
+
+ break;
+
+ case ARG_BIND_DEVICE:
+ arg_bind_device = true;
+ break;
+
+ case ARG_LIST:
+ arg_action = ACTION_LIST;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) {
+ log_error("Execution in user context is not supported on non-local systems.");
+ return -EINVAL;
+ }
+
+ if (arg_action == ACTION_LIST) {
+ if (optind < argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ if (arg_transport != BUS_TRANSPORT_LOCAL) {
+ log_error("Listing devices only supported locally.");
+ return -EOPNOTSUPP;
+ }
+ } else {
+ if (optind >= argc) {
+ log_error("At least one argument required.");
+ return -EINVAL;
+ }
+
+ if (argc > optind+2) {
+ log_error("At most two arguments required.");
+ return -EINVAL;
+ }
+
+ arg_mount_what = fstab_node_to_udev_node(argv[optind]);
+ if (!arg_mount_what)
+ return log_oom();
+
+ if (argc > optind+1) {
+ r = path_make_absolute_cwd(argv[optind+1], &arg_mount_where);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make path absolute: %m");
+ } else
+ arg_discover = true;
+
+ if (arg_discover && arg_transport != BUS_TRANSPORT_LOCAL) {
+ log_error("Automatic mount location discovery is only supported locally.");
+ return -EOPNOTSUPP;
+ }
+ }
+
+ return 1;
+}
+
+static int transient_unit_set_properties(sd_bus_message *m, char **properties) {
+ int r;
+
+ r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
+ if (r < 0)
+ return r;
+
+ if (arg_bind_device && is_device_path(arg_mount_what)) {
+ _cleanup_free_ char *device_unit = NULL;
+
+ r = unit_name_from_path(arg_mount_what, ".device", &device_unit);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "(sv)(sv)",
+ "After", "as", 1, device_unit,
+ "BindsTo", "as", 1, device_unit);
+ if (r < 0)
+ return r;
+ }
+
+ r = bus_append_unit_property_assignment_many(m, properties);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int transient_mount_set_properties(sd_bus_message *m) {
+ int r;
+
+ assert(m);
+
+ r = transient_unit_set_properties(m, arg_property);
+ if (r < 0)
+ return r;
+
+ if (arg_mount_what) {
+ r = sd_bus_message_append(m, "(sv)", "What", "s", arg_mount_what);
+ if (r < 0)
+ return r;
+ }
+
+ if (arg_mount_type) {
+ r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_mount_type);
+ if (r < 0)
+ return r;
+ }
+
+ if (arg_mount_options) {
+ r = sd_bus_message_append(m, "(sv)", "Options", "s", arg_mount_options);
+ if (r < 0)
+ return r;
+ }
+
+ if (arg_fsck) {
+ _cleanup_free_ char *fsck = NULL;
+
+ r = unit_name_from_path_instance("elogind-fsck", arg_mount_what, ".service", &fsck);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m,
+ "(sv)(sv)",
+ "Requires", "as", 1, fsck,
+ "After", "as", 1, fsck);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int transient_automount_set_properties(sd_bus_message *m) {
+ int r;
+
+ assert(m);
+
+ r = transient_unit_set_properties(m, arg_automount_property);
+ if (r < 0)
+ return r;
+
+ if (arg_timeout_idle != USEC_INFINITY) {
+ r = sd_bus_message_append(m, "(sv)", "TimeoutIdleUSec", "t", arg_timeout_idle);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int start_transient_mount(
+ sd_bus *bus,
+ char **argv) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
+ _cleanup_free_ char *mount_unit = NULL;
+ int r;
+
+ if (!arg_no_block) {
+ r = bus_wait_for_jobs_new(bus, &w);
+ if (r < 0)
+ return log_error_errno(r, "Could not watch jobs: %m");
+ }
+
+ r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make mount unit name: %m");
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ &m,
+ "org.freedesktop.elogind1",
+ "/org/freedesktop/elogind1",
+ "org.freedesktop.elogind1.Manager",
+ "StartTransientUnit");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Name and mode */
+ r = sd_bus_message_append(m, "ss", mount_unit, "fail");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Properties */
+ r = sd_bus_message_open_container(m, 'a', "(sv)");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = transient_mount_set_properties(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Auxiliary units */
+ r = sd_bus_message_append(m, "a(sa(sv))", 0);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ polkit_agent_open_if_enabled();
+
+ r = sd_bus_call(bus, m, 0, &error, &reply);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start transient mount unit: %s", bus_error_message(&error, r));
+
+ if (w) {
+ const char *object;
+
+ r = sd_bus_message_read(reply, "o", &object);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = bus_wait_for_jobs_one(w, object, arg_quiet);
+ if (r < 0)
+ return r;
+ }
+
+ if (!arg_quiet)
+ log_info("Started unit %s%s%s for mount point: %s%s%s",
+ ansi_highlight(), mount_unit, ansi_normal(),
+ ansi_highlight(), arg_mount_where, ansi_normal());
+
+ return 0;
+}
+
+static int start_transient_automount(
+ sd_bus *bus,
+ char **argv) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
+ _cleanup_free_ char *automount_unit = NULL, *mount_unit = NULL;
+ int r;
+
+ if (!arg_no_block) {
+ r = bus_wait_for_jobs_new(bus, &w);
+ if (r < 0)
+ return log_error_errno(r, "Could not watch jobs: %m");
+ }
+
+ r = unit_name_from_path(arg_mount_where, ".automount", &automount_unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make automount unit name: %m");
+
+ r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make mount unit name: %m");
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ &m,
+ "org.freedesktop.elogind1",
+ "/org/freedesktop/elogind1",
+ "org.freedesktop.elogind1.Manager",
+ "StartTransientUnit");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Name and mode */
+ r = sd_bus_message_append(m, "ss", automount_unit, "fail");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Properties */
+ r = sd_bus_message_open_container(m, 'a', "(sv)");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = transient_automount_set_properties(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Auxiliary units */
+ r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_open_container(m, 'r', "sa(sv)");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "s", mount_unit);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_open_container(m, 'a', "(sv)");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = transient_mount_set_properties(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ polkit_agent_open_if_enabled();
+
+ r = sd_bus_call(bus, m, 0, &error, &reply);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start transient automount unit: %s", bus_error_message(&error, r));
+
+ if (w) {
+ const char *object;
+
+ r = sd_bus_message_read(reply, "o", &object);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = bus_wait_for_jobs_one(w, object, arg_quiet);
+ if (r < 0)
+ return r;
+ }
+
+ if (!arg_quiet)
+ log_info("Started unit %s%s%s for mount point: %s%s%s",
+ ansi_highlight(), automount_unit, ansi_normal(),
+ ansi_highlight(), arg_mount_where, ansi_normal());
+
+ return 0;
+}
+
+static int acquire_mount_type(struct udev_device *d) {
+ const char *v;
+
+ assert(d);
+
+ if (arg_mount_type)
+ return 0;
+
+ v = udev_device_get_property_value(d, "ID_FS_TYPE");
+ if (isempty(v))
+ return 0;
+
+ arg_mount_type = strdup(v);
+ if (!arg_mount_type)
+ return log_oom();
+
+ log_debug("Discovered type=%s", arg_mount_type);
+ return 1;
+}
+
+static int acquire_mount_options(struct udev_device *d) {
+ const char *v;
+
+ if (arg_mount_options)
+ return 0;
+
+ v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_OPTIONS");
+ if (isempty(v))
+ return 0;
+
+ arg_mount_options = strdup(v);
+ if (!arg_mount_options)
+ return log_oom();
+
+ log_debug("Discovered options=%s", arg_mount_options);
+ return 1;
+}
+
+static const char *get_model(struct udev_device *d) {
+ const char *model;
+
+ assert(d);
+
+ model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE");
+ if (model)
+ return model;
+
+ return udev_device_get_property_value(d, "ID_MODEL");
+}
+
+static const char* get_label(struct udev_device *d) {
+ const char *label;
+
+ assert(d);
+
+ label = udev_device_get_property_value(d, "ID_FS_LABEL");
+ if (label)
+ return label;
+
+ return udev_device_get_property_value(d, "ID_PART_ENTRY_NAME");
+}
+
+static int acquire_mount_where(struct udev_device *d) {
+ const char *v;
+
+ if (arg_mount_where)
+ return 0;
+
+ v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE");
+ if (isempty(v)) {
+ _cleanup_free_ char *escaped = NULL;
+ const char *name;
+
+ name = get_label(d);
+ if (!name)
+ name = get_model(d);
+ if (!name) {
+ const char *dn;
+
+ dn = udev_device_get_devnode(d);
+ if (!dn)
+ return 0;
+
+ name = basename(dn);
+ }
+
+ escaped = xescape(name, "\\");
+ if (!filename_is_valid(escaped))
+ return 0;
+
+ arg_mount_where = strjoin("/run/media/system/", escaped, NULL);
+ } else
+ arg_mount_where = strdup(v);
+
+ if (!arg_mount_where)
+ return log_oom();
+
+ log_debug("Discovered where=%s", arg_mount_where);
+ return 1;
+}
+
+static int acquire_description(struct udev_device *d) {
+ const char *model, *label;
+
+ if (arg_description)
+ return 0;
+
+ model = get_model(d);
+
+ label = get_label(d);
+ if (!label)
+ label = udev_device_get_property_value(d, "ID_PART_ENTRY_NUMBER");
+
+ if (model && label)
+ arg_description = strjoin(model, " ", label, NULL);
+ else if (label)
+ arg_description = strdup(label);
+ else if (model)
+ arg_description = strdup(model);
+ else
+ return NULL;
+
+ if (!arg_description)
+ return log_oom();
+
+ log_debug("Discovered description=%s", arg_description);
+ return 1;
+}
+
+static int acquire_removable(struct udev_device *d) {
+ const char *v;
+
+ /* Shortcut this if there's no reason to check it */
+ if (arg_action != ACTION_DEFAULT && arg_timeout_idle_set && arg_bind_device >= 0)
+ return 0;
+
+ for (;;) {
+ v = udev_device_get_sysattr_value(d, "removable");
+ if (v)
+ break;
+
+ d = udev_device_get_parent(d);
+ if (!d)
+ return 0;
+
+ if (!streq_ptr(udev_device_get_subsystem(d), "block"))
+ return 0;
+ }
+
+ if (parse_boolean(v) <= 0)
+ return 0;
+
+ log_debug("Discovered removable device.");
+
+ if (arg_action == ACTION_DEFAULT) {
+ log_debug("Automatically turning on automount.");
+ arg_action = ACTION_AUTOMOUNT;
+ }
+
+ if (!arg_timeout_idle_set) {
+ log_debug("Setting idle timeout to 1s.");
+ arg_timeout_idle = USEC_PER_SEC;
+ }
+
+ if (arg_bind_device < 0) {
+ log_debug("Binding automount unit to device.");
+ arg_bind_device = true;
+ }
+
+ return 1;
+}
+
+static int discover_device(void) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ _cleanup_udev_unref_ struct udev *udev = NULL;
+ struct stat st;
+ const char *v;
+ int r;
+
+ if (!arg_discover)
+ return 0;
+
+ if (!is_device_path(arg_mount_what)) {
+ log_error("Discovery only supported for block devices, don't know what to do.");
+ return -EINVAL;
+ }
+
+ if (stat(arg_mount_what, &st) < 0)
+ return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what);
+
+ if (!S_ISBLK(st.st_mode)) {
+ log_error("Path %s is not a block device, don't know what to do.", arg_mount_what);
+ return -ENOTBLK;
+ }
+
+ udev = udev_new();
+ if (!udev)
+ return log_oom();
+
+ d = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
+ if (!d)
+ return log_oom();
+
+ v = udev_device_get_property_value(d, "ID_FS_USAGE");
+ if (!streq_ptr(v, "filesystem")) {
+ log_error("%s does not contain a file system.", arg_mount_what);
+ return -EINVAL;
+ }
+
+ r = acquire_mount_type(d);
+ if (r < 0)
+ return r;
+
+ r = acquire_mount_options(d);
+ if (r < 0)
+ return r;
+
+ r = acquire_mount_where(d);
+ if (r < 0)
+ return r;
+
+ r = acquire_description(d);
+ if (r < 0)
+ return r;
+
+ r = acquire_removable(d);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+enum {
+ COLUMN_NODE,
+ COLUMN_PATH,
+ COLUMN_MODEL,
+ COLUMN_WWN,
+ COLUMN_FSTYPE,
+ COLUMN_LABEL,
+ COLUMN_UUID,
+ _COLUMN_MAX,
+};
+
+struct item {
+ char* columns[_COLUMN_MAX];
+};
+
+static int compare_item(const void *a, const void *b) {
+ const struct item *x = a, *y = b;
+
+ if (x->columns[COLUMN_NODE] == y->columns[COLUMN_NODE])
+ return 0;
+ if (!x->columns[COLUMN_NODE])
+ return 1;
+ if (!y->columns[COLUMN_NODE])
+ return -1;
+
+ return path_compare(x->columns[COLUMN_NODE], y->columns[COLUMN_NODE]);
+}
+
+static int list_devices(void) {
+
+ static const char * const titles[_COLUMN_MAX] = {
+ [COLUMN_NODE] = "NODE",
+ [COLUMN_PATH] = "PATH",
+ [COLUMN_MODEL] = "MODEL",
+ [COLUMN_WWN] = "WWN",
+ [COLUMN_FSTYPE] = "TYPE",
+ [COLUMN_LABEL] = "LABEL",
+ [COLUMN_UUID] = "UUID"
+ };
+
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
+ _cleanup_udev_unref_ struct udev *udev = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+ size_t n_allocated = 0, n = 0, i;
+ size_t column_width[_COLUMN_MAX];
+ struct item *items = NULL;
+ unsigned c;
+ int r;
+
+ for (c = 0; c < _COLUMN_MAX; c++)
+ column_width[c] = strlen(titles[c]);
+
+ udev = udev_new();
+ if (!udev)
+ return log_oom();
+
+ e = udev_enumerate_new(udev);
+ if (!e)
+ return log_oom();
+
+ r = udev_enumerate_add_match_subsystem(e, "block");
+ if (r < 0)
+ return log_error_errno(r, "Failed to add block match: %m");
+
+ r = udev_enumerate_add_match_property(e, "ID_FS_USAGE", "filesystem");
+ if (r < 0)
+ return log_error_errno(r, "Failed to add property match: %m");
+
+ r = udev_enumerate_scan_devices(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to scan devices: %m");
+
+ first = udev_enumerate_get_list_entry(e);
+ udev_list_entry_foreach(item, first) {
+ _cleanup_udev_device_unref_ struct udev_device *d;
+ struct item *j;
+
+ d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
+ if (!d) {
+ r = log_oom();
+ goto finish;
+ }
+
+ if (!GREEDY_REALLOC0(items, n_allocated, n+1)) {
+ r = log_oom();
+ goto finish;
+ }
+
+ j = items + n++;
+
+ for (c = 0; c < _COLUMN_MAX; c++) {
+ const char *x;
+ size_t k;
+
+ switch (c) {
+
+ case COLUMN_NODE:
+ x = udev_device_get_devnode(d);
+ break;
+
+ case COLUMN_PATH:
+ x = udev_device_get_property_value(d, "ID_PATH");
+ break;
+
+ case COLUMN_MODEL:
+ x = get_model(d);
+ break;
+
+ case COLUMN_WWN:
+ x = udev_device_get_property_value(d, "ID_WWN");
+ break;
+
+ case COLUMN_FSTYPE:
+ x = udev_device_get_property_value(d, "ID_FS_TYPE");
+ break;
+
+ case COLUMN_LABEL:
+ x = get_label(d);
+ break;
+
+ case COLUMN_UUID:
+ x = udev_device_get_property_value(d, "ID_FS_UUID");
+ break;
+ }
+
+ if (isempty(x))
+ continue;
+
+ j->columns[c] = strdup(x);
+ if (!j->columns[c]) {
+ r = log_oom();
+ goto finish;
+ }
+
+ k = strlen(x);
+ if (k > column_width[c])
+ column_width[c] = k;
+ }
+ }
+
+ if (n == 0) {
+ log_info("No devices found.");
+ goto finish;
+ }
+
+ qsort_safe(items, n, sizeof(struct item), compare_item);
+
+ pager_open(arg_no_pager, false);
+
+ fputs(ansi_underline(), stdout);
+ for (c = 0; c < _COLUMN_MAX; c++) {
+ if (c > 0)
+ fputc(' ', stdout);
+
+ printf("%-*s", (int) column_width[c], titles[c]);
+ }
+ fputs(ansi_normal(), stdout);
+ fputc('\n', stdout);
+
+ for (i = 0; i < n; i++) {
+ for (c = 0; c < _COLUMN_MAX; c++) {
+ if (c > 0)
+ fputc(' ', stdout);
+
+ printf("%-*s", (int) column_width[c], strna(items[i].columns[c]));
+ }
+ fputc('\n', stdout);
+ }
+
+ r = 0;
+
+finish:
+ for (i = 0; i < n; i++)
+ for (c = 0; c < _COLUMN_MAX; c++)
+ free(items[i].columns[c]);
+
+ free(items);
+ return r;
+}
+
+int main(int argc, char* argv[]) {
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ int r;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ if (arg_action == ACTION_LIST) {
+ r = list_devices();
+ goto finish;
+ }
+
+ r = discover_device();
+ if (r < 0)
+ goto finish;
+ if (!arg_mount_where) {
+ log_error("Can't figure out where to mount %s.", arg_mount_what);
+ r = -EINVAL;
+ goto finish;
+ }
+
+ path_kill_slashes(arg_mount_where);
+
+ if (path_equal(arg_mount_where, "/")) {
+ log_error("Refusing to operate on root directory.");
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (!path_is_safe(arg_mount_where)) {
+ log_error("Path is contains unsafe components.");
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (streq_ptr(arg_mount_type, "auto"))
+ arg_mount_type = mfree(arg_mount_type);
+ if (streq_ptr(arg_mount_options, "defaults"))
+ arg_mount_options = mfree(arg_mount_options);
+
+ if (!is_device_path(arg_mount_what))
+ arg_fsck = false;
+
+ if (arg_fsck && arg_mount_type && arg_transport == BUS_TRANSPORT_LOCAL) {
+ r = fsck_exists(arg_mount_type);
+ if (r < 0)
+ log_warning_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", arg_mount_type);
+ else if (r == 0) {
+ log_debug("Disabling file system check as fsck for %s doesn't exist.", arg_mount_type);
+ arg_fsck = false; /* fsck doesn't exist, let's not attempt it */
+ }
+ }
+
+ r = bus_connect_transport_elogind(arg_transport, arg_host, arg_user, &bus);
+ if (r < 0) {
+ log_error_errno(r, "Failed to create bus connection: %m");
+ goto finish;
+ }
+
+ switch (arg_action) {
+
+ case ACTION_MOUNT:
+ case ACTION_DEFAULT:
+ r = start_transient_mount(bus, argv + optind);
+ break;
+
+ case ACTION_AUTOMOUNT:
+ r = start_transient_automount(bus, argv + optind);
+ break;
+
+ default:
+ assert_not_reached("Unexpected action.");
+ }
+
+finish:
+ bus = sd_bus_flush_close_unref(bus);
+
+ pager_close();
+
+ free(arg_mount_what);
+ free(arg_mount_where);
+ free(arg_mount_type);
+ free(arg_mount_options);
+ free(arg_description);
+ strv_free(arg_property);
+ strv_free(arg_automount_property);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
~ianmdlvl / elogind.git / commitdiff