/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2016 Lennart Poettering
systemd 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.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include "libudev.h"
#include "sd-bus.h"
#include "bus-error.h"
#include "bus-unit-util.h"
#include "bus-util.h"
#include "dirent-util.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "fstab-util.h"
#include "mount-util.h"
#include "pager.h"
#include "parse-util.h"
#include "path-util.h"
#include "spawn-polkit-agent.h"
#include "stat-util.h"
#include "strv.h"
#include "udev-util.h"
#include "unit-def.h"
#include "unit-name.h"
#include "user-util.h"
#include "terminal-util.h"
enum {
ACTION_DEFAULT,
ACTION_MOUNT,
ACTION_AUTOMOUNT,
ACTION_UMOUNT,
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 uid_t arg_uid = UID_INVALID;
static gid_t arg_gid = GID_INVALID;
static bool arg_fsck = true;
static bool arg_aggressive_gc = false;
static void help(void) {
printf("systemd-mount [OPTIONS...] WHAT [WHERE]\n"
"systemd-mount [OPTIONS...] --list\n"
"%s [OPTIONS...] %sWHAT|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"
" --owner=USER Add uid= and gid= options for USER\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"
" -u --umount Unmount mount points\n"
" -G --collect Unload unit after it stopped, even when failed\n",
program_invocation_short_name,
streq(program_invocation_short_name, "systemd-umount") ? "" : "--umount ");
}
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_OWNER,
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' },
{ "owner", required_argument, NULL, ARG_OWNER },
{ "fsck", required_argument, NULL, ARG_FSCK },
{ "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 },
{ "umount", no_argument, NULL, 'u' },
{ "unmount", no_argument, NULL, 'u' },
{ "collect", no_argument, NULL, 'G' },
{},
};
int r, c;
assert(argc >= 0);
assert(argv);
if (strstr(program_invocation_short_name, "systemd-umount"))
arg_action = ACTION_UMOUNT;
while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:AuG", 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_OWNER: {
const char *user = optarg;
r = get_user_creds(&user, &arg_uid, &arg_gid, NULL, NULL);
if (r < 0)
return log_error_errno(r,
r == -EBADMSG ? "UID or GID of user %s are invalid."
: "Cannot use \"%s\" as owner: %m",
optarg);
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 'u':
arg_action = ACTION_UMOUNT;
break;
case 'G':
arg_aggressive_gc = true;
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 (arg_action == ACTION_UMOUNT) {
if (optind >= argc) {
log_error("At least one argument required.");
return -EINVAL;
}
if (arg_transport != BUS_TRANSPORT_LOCAL) {
int i;
for (i = optind; i < argc; i++)
if (!path_is_absolute(argv[i]) ) {
log_error("Only absolute path is supported: %s", argv[i]);
return -EINVAL;
}
}
} 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;
}
if (arg_mount_type && (fstype_is_api_vfs(arg_mount_type) || fstype_is_network(arg_mount_type))) {
arg_mount_what = strdup(argv[optind]);
if (!arg_mount_what)
return log_oom();
} else if (arg_transport == BUS_TRANSPORT_LOCAL) {
_cleanup_free_ char *u = NULL;
u = fstab_node_to_udev_node(argv[optind]);
if (!u)
return log_oom();
r = chase_symlinks(u, NULL, 0, &arg_mount_what);
if (r < 0)
return log_error_errno(r, "Failed to make path %s absolute: %m", u);
} else {
arg_mount_what = strdup(argv[optind]);
if (!arg_mount_what)
return log_oom();
path_kill_slashes(arg_mount_what);
if (!path_is_absolute(arg_mount_what)) {
log_error("Only absolute path is supported: %s", arg_mount_what);
return -EINVAL;
}
}
if (argc > optind+1) {
if (arg_transport == BUS_TRANSPORT_LOCAL) {
r = chase_symlinks(argv[optind+1], NULL, CHASE_NONEXISTENT, &arg_mount_where);
if (r < 0)
return log_error_errno(r, "Failed to make path %s absolute: %m", argv[optind+1]);
} else {
arg_mount_where = strdup(argv[optind+1]);
if (!arg_mount_where)
return log_oom();
path_kill_slashes(arg_mount_where);
if (!path_is_absolute(arg_mount_where)) {
log_error("Only absolute path is supported: %s", arg_mount_where);
return -EINVAL;
}
}
} 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, UnitType t, char **properties) {
int r;
if (!isempty(arg_description)) {
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;
}
if (arg_aggressive_gc) {
r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed");
if (r < 0)
return r;
}
r = bus_append_unit_property_assignment_many(m, t, properties);
if (r < 0)
return r;
return 0;
}
static int transient_mount_set_properties(sd_bus_message *m) {
_cleanup_free_ char *options = NULL;
int r;
assert(m);
r = transient_unit_set_properties(m, UNIT_MOUNT, 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;
}
/* Prepend uid=…,gid=… if arg_uid is set */
if (arg_uid != UID_INVALID) {
r = asprintf(&options,
"uid=" UID_FMT ",gid=" GID_FMT "%s%s",
arg_uid, arg_gid,
arg_mount_options ? "," : "", arg_mount_options);
if (r < 0)
return -ENOMEM;
}
if (options || arg_mount_options) {
log_debug("Using mount options: %s", options ?: arg_mount_options);
r = sd_bus_message_append(m, "(sv)", "Options", "s", options ?: arg_mount_options);
if (r < 0)
return r;
} else
log_debug("Not using any mount options");
if (arg_fsck) {
_cleanup_free_ char *fsck = NULL;
r = unit_name_from_path_instance("systemd-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, UNIT_AUTOMOUNT, 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.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.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(arg_transport, arg_ask_password);
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.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.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(arg_transport, arg_ask_password);
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 find_mount_points(const char *what, char ***list) {
_cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
_cleanup_strv_free_ char **l = NULL;
size_t bufsize = 0, n = 0;
assert(what);
assert(list);
/* Returns all mount points obtained from /proc/self/mountinfo in *list,
* and the number of mount points as return value. */
proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
if (!proc_self_mountinfo)
return log_error_errno(errno, "Can't open /proc/self/mountinfo: %m");
for (;;) {
_cleanup_free_ char *path = NULL, *where = NULL, *dev = NULL;
int r;
r = fscanf(proc_self_mountinfo,
"%*s " /* (1) mount id */
"%*s " /* (2) parent id */
"%*s " /* (3) major:minor */
"%*s " /* (4) root */
"%ms " /* (5) mount point */
"%*s" /* (6) mount options */
"%*[^-]" /* (7) optional fields */
"- " /* (8) separator */
"%*s " /* (9) file system type */
"%ms" /* (10) mount source */
"%*s" /* (11) mount options 2 */
"%*[^\n]", /* some rubbish at the end */
&path, &dev);
if (r != 2) {
if (r == EOF)
break;
continue;
}
if (!streq(what, dev))
continue;
r = cunescape(path, UNESCAPE_RELAX, &where);
if (r < 0)
continue;
/* one extra slot is needed for the terminating NULL */
if (!GREEDY_REALLOC(l, bufsize, n + 2))
return log_oom();
l[n++] = TAKE_PTR(where);
}
if (!GREEDY_REALLOC(l, bufsize, n + 1))
return log_oom();
l[n] = NULL;
*list = TAKE_PTR(l);
return n;
}
static int find_loop_device(const char *backing_file, char **loop_dev) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
_cleanup_free_ char *l = NULL;
assert(backing_file);
assert(loop_dev);
d = opendir("/sys/devices/virtual/block");
if (!d)
return -errno;
FOREACH_DIRENT(de, d, return -errno) {
_cleanup_free_ char *sys = NULL, *fname = NULL;
int r;
dirent_ensure_type(d, de);
if (de->d_type != DT_DIR)
continue;
if (!startswith(de->d_name, "loop"))
continue;
sys = strjoin("/sys/devices/virtual/block/", de->d_name, "/loop/backing_file");
if (!sys)
return -ENOMEM;
r = read_one_line_file(sys, &fname);
if (r < 0) {
log_debug_errno(r, "Failed to read %s, ignoring: %m", sys);
continue;
}
if (files_same(fname, backing_file, 0) <= 0)
continue;
l = strjoin("/dev/", de->d_name);
if (!l)
return -ENOMEM;
break;
}
if (!l)
return -ENXIO;
*loop_dev = TAKE_PTR(l);
return 0;
}
static int stop_mount(
sd_bus *bus,
const char *where,
const char *suffix) {
_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(where, suffix, &mount_unit);
if (r < 0)
return log_error_errno(r, "Failed to make %s unit name from path %s: %m", suffix + 1, where);
r = sd_bus_message_new_method_call(
bus,
&m,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"StopUnit");
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);
polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
if (streq(suffix, ".automount") &&
sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit"))
return 0;
return log_error_errno(r, "Failed to stop %s unit: %s", suffix + 1, 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("Stopped unit %s%s%s for mount point: %s%s%s",
ansi_highlight(), mount_unit, ansi_normal(),
ansi_highlight(), where, ansi_normal());
return 0;
}
static int stop_mounts(
sd_bus *bus,
const char *where) {
int r;
if (path_equal(where, "/")) {
log_error("Refusing to operate on root directory: %s", where);
return -EINVAL;
}
if (!path_is_normalized(where)) {
log_error("Path contains non-normalized components: %s", where);
return -EINVAL;
}
r = stop_mount(bus, where, ".mount");
if (r < 0)
return r;
r = stop_mount(bus, where, ".automount");
if (r < 0)
return r;
return 0;
}
static int umount_by_device(sd_bus *bus, const char *what) {
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
_cleanup_udev_unref_ struct udev *udev = NULL;
_cleanup_strv_free_ char **list = NULL;
struct stat st;
const char *v;
char **l;
int r, r2 = 0;
assert(what);
if (stat(what, &st) < 0)
return log_error_errno(errno, "Can't stat %s: %m", what);
if (!S_ISBLK(st.st_mode)) {
log_error("Not a block device: %s", 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 known file system.", what);
return -EINVAL;
}
v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE");
if (!isempty(v))
r2 = stop_mounts(bus, v);
r = find_mount_points(what, &list);
if (r < 0)
return r;
for (l = list; *l; l++) {
r = stop_mounts(bus, *l);
if (r < 0)
r2 = r;
}
return r2;
}
static int umount_loop(sd_bus *bus, const char *backing_file) {
_cleanup_free_ char *loop_dev = NULL;
int r;
assert(backing_file);
r = find_loop_device(backing_file, &loop_dev);
if (r < 0)
return log_error_errno(r, r == -ENXIO ? "File %s is not mounted." : "Can't get loop device for %s: %m", backing_file);
return umount_by_device(bus, loop_dev);
}
static int action_umount(
sd_bus *bus,
int argc,
char **argv) {
int i, r, r2 = 0;
if (arg_transport != BUS_TRANSPORT_LOCAL) {
for (i = optind; i < argc; i++) {
_cleanup_free_ char *p = NULL;
p = strdup(argv[i]);
if (!p)
return log_oom();
path_kill_slashes(p);
r = stop_mounts(bus, p);
if (r < 0)
r2 = r;
}
return r2;
}
for (i = optind; i < argc; i++) {
_cleanup_free_ char *u = NULL, *p = NULL;
struct stat st;
u = fstab_node_to_udev_node(argv[i]);
if (!u)
return log_oom();
r = chase_symlinks(u, NULL, 0, &p);
if (r < 0) {
r2 = log_error_errno(r, "Failed to make path %s absolute: %m", argv[i]);
continue;
}
if (stat(p, &st) < 0)
return log_error_errno(errno, "Can't stat %s (from %s): %m", p, argv[i]);
if (S_ISBLK(st.st_mode))
r = umount_by_device(bus, p);
else if (S_ISREG(st.st_mode))
r = umount_loop(bus, p);
else if (S_ISDIR(st.st_mode))
r = stop_mounts(bus, p);
else {
log_error("Invalid file type: %s (from %s)", p, argv[i]);
r = -EINVAL;
}
if (r < 0)
r2 = r;
}
return r2;
}
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 (!escaped)
return log_oom();
if (!filename_is_valid(escaped))
return 0;
arg_mount_where = strjoin("/run/media/system/", escaped);
} 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_mount_where_for_loop_dev(const char *loop_dev) {
_cleanup_strv_free_ char **list = NULL;
int r;
if (arg_mount_where)
return 0;
r = find_mount_points(loop_dev, &list);
if (r < 0)
return r;
else if (r == 0) {
log_error("Can't find mount point of %s. It is expected that %s is already mounted on a place.", loop_dev, loop_dev);
return -EINVAL;
} else if (r >= 2) {
log_error("%s is mounted on %d places. It is expected that %s is mounted on a place.", loop_dev, r, loop_dev);
return -EINVAL;
}
arg_mount_where = strdup(list[0]);
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);
else if (label)
arg_description = strdup(label);
else if (model)
arg_description = strdup(model);
else
return 0;
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_loop_backing_file(void) {
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
_cleanup_udev_unref_ struct udev *udev = NULL;
_cleanup_free_ char *loop_dev = NULL;
struct stat st;
const char *v;
int r;
r = find_loop_device(arg_mount_what, &loop_dev);
if (r < 0 && r != -ENXIO)
return log_error_errno(errno, "Can't get loop device for %s: %m", arg_mount_what);
if (r == -ENXIO) {
_cleanup_free_ char *escaped = NULL;
if (arg_mount_where)
return 0;
escaped = xescape(basename(arg_mount_what), "\\");
if (!escaped)
return log_oom();
if (!filename_is_valid(escaped)) {
log_error("Escaped name %s is not a valid filename.", escaped);
return -EINVAL;
}
arg_mount_where = strjoin("/run/media/system/", escaped);
if (!arg_mount_where)
return log_oom();
log_debug("Discovered where=%s", arg_mount_where);
return 0;
}
if (stat(loop_dev, &st) < 0)
return log_error_errno(errno, "Can't stat %s: %m", loop_dev);
if (!S_ISBLK(st.st_mode)) {
log_error("Invalid file type: %s", loop_dev);
return -EINVAL;
}
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 known 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_for_loop_dev(loop_dev);
if (r < 0)
return r;
r = acquire_description(d);
if (r < 0)
return r;
return 0;
}
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 (stat(arg_mount_what, &st) < 0)
return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what);
if (S_ISREG(st.st_mode))
return discover_loop_backing_file();
if (!S_ISBLK(st.st_mode)) {
log_error("Invalid file type: %s", arg_mount_what);
return -EINVAL;
}
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 known 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 = NULL;
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);
(void) 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[]) {
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 = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus);
if (r < 0) {
log_error_errno(r, "Failed to create bus connection: %m");
goto finish;
}
if (arg_action == ACTION_UMOUNT) {
r = action_umount(bus, argc, argv);
goto finish;
}
if (!path_is_normalized(arg_mount_what)) {
log_error("Path contains non-normalized components: %s", arg_mount_what);
r = -EINVAL;
goto finish;
}
if (arg_discover) {
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;
}
if (path_equal(arg_mount_where, "/")) {
log_error("Refusing to operate on root directory.");
r = -EINVAL;
goto finish;
}
if (!path_is_normalized(arg_mount_where)) {
log_error("Path contains non-normalized components: %s", arg_mount_where);
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 */
}
}
/* The kernel (properly) refuses mounting file systems with unknown uid=,gid= options,
* but not for all filesystem types. Let's try to catch the cases where the option
* would be used if the file system does not support it. It is also possible to
* autodetect the file system, but that's only possible with disk-based file systems
* which incidentally seem to be implemented more carefully and reject unknown options,
* so it's probably OK that we do the check only when the type is specified.
*/
if (arg_mount_type &&
!streq(arg_mount_type, "auto") &&
arg_uid != UID_INVALID &&
!fstype_can_uid_gid(arg_mount_type)) {
log_error("File system type %s is not known to support uid=/gid=, refusing.",
arg_mount_type);
r = -EOPNOTSUPP;
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:
/* make sure we terminate the bus connection first, and then close the
* pager, see issue #3543 for the details. */
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;
}