summaryrefslogtreecommitdiffstats
path: root/src/systemctl/systemctl-enable.c
blob: 8f053ca649c71eb08c422b6df7a62fce0a602e9d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "bus-error.h"
#include "bus-locator.h"
#include "locale-util.h"
#include "path-util.h"
#include "systemctl-daemon-reload.h"
#include "systemctl-enable.h"
#include "systemctl-start-unit.h"
#include "systemctl-sysv-compat.h"
#include "systemctl-util.h"
#include "systemctl.h"

static int normalize_filenames(char **names) {
        char **u;
        int r;

        STRV_FOREACH(u, names)
                if (!path_is_absolute(*u)) {
                        char* normalized_path;

                        if (!isempty(arg_root))
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Non-absolute paths are not allowed when --root is used: %s",
                                                       *u);

                        if (!strchr(*u,'/'))
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Link argument does contain at least one directory separator: %s",
                                                       *u);

                        r = path_make_absolute_cwd(*u, &normalized_path);
                        if (r < 0)
                                return r;

                        free_and_replace(*u, normalized_path);
                }

        return 0;
}

static int normalize_names(char **names, bool warn_if_path) {
        char **u;
        bool was_path = false;

        STRV_FOREACH(u, names) {
                int r;

                if (!is_path(*u))
                        continue;

                r = free_and_strdup(u, basename(*u));
                if (r < 0)
                        return log_error_errno(r, "Failed to normalize unit file path: %m");

                was_path = true;
        }

        if (warn_if_path && was_path)
                log_warning("Warning: Can't execute disable on the unit file path. Proceeding with the unit name.");

        return 0;
}

int enable_unit(int argc, char *argv[], void *userdata) {
        _cleanup_strv_free_ char **names = NULL;
        const char *verb = argv[0];
        UnitFileChange *changes = NULL;
        size_t n_changes = 0;
        int carries_install_info = -1;
        bool ignore_carries_install_info = arg_quiet;
        int r;

        if (!argv[1])
                return 0;

        r = mangle_names("to enable", strv_skip(argv, 1), &names);
        if (r < 0)
                return r;

        r = enable_sysv_units(verb, names);
        if (r < 0)
                return r;

        /* If the operation was fully executed by the SysV compat, let's finish early */
        if (strv_isempty(names)) {
                if (arg_no_reload || install_client_side())
                        return 0;
                return daemon_reload(argc, argv, userdata);
        }

        if (streq(verb, "disable")) {
                r = normalize_names(names, true);
                if (r < 0)
                        return r;
        }

        if (streq(verb, "link")) {
                r = normalize_filenames(names);
                if (r < 0)
                        return r;
        }

        if (install_client_side()) {
                UnitFileFlags flags;

                flags = unit_file_flags_from_args();
                if (streq(verb, "enable")) {
                        r = unit_file_enable(arg_scope, flags, arg_root, names, &changes, &n_changes);
                        carries_install_info = r;
                } else if (streq(verb, "disable"))
                        r = unit_file_disable(arg_scope, flags, arg_root, names, &changes, &n_changes);
                else if (streq(verb, "reenable")) {
                        r = unit_file_reenable(arg_scope, flags, arg_root, names, &changes, &n_changes);
                        carries_install_info = r;
                } else if (streq(verb, "link"))
                        r = unit_file_link(arg_scope, flags, arg_root, names, &changes, &n_changes);
                else if (streq(verb, "preset")) {
                        r = unit_file_preset(arg_scope, flags, arg_root, names, arg_preset_mode, &changes, &n_changes);
                } else if (streq(verb, "mask"))
                        r = unit_file_mask(arg_scope, flags, arg_root, names, &changes, &n_changes);
                else if (streq(verb, "unmask"))
                        r = unit_file_unmask(arg_scope, flags, arg_root, names, &changes, &n_changes);
                else if (streq(verb, "revert"))
                        r = unit_file_revert(arg_scope, arg_root, names, &changes, &n_changes);
                else
                        assert_not_reached("Unknown verb");

                unit_file_dump_changes(r, verb, changes, n_changes, arg_quiet);
                if (r < 0)
                        goto finish;
                r = 0;
        } else {
                _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL;
                _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
                bool expect_carries_install_info = false;
                bool send_runtime = true, send_force = true, send_preset_mode = false;
                const char *method;
                sd_bus *bus;

                if (STR_IN_SET(verb, "mask", "unmask")) {
                        char **name;
                        _cleanup_(lookup_paths_free) LookupPaths lp = {};

                        r = lookup_paths_init(&lp, arg_scope, 0, arg_root);
                        if (r < 0)
                                return r;

                        STRV_FOREACH(name, names) {
                                r = unit_exists(&lp, *name);
                                if (r < 0)
                                        return r;
                                if (r == 0)
                                        log_notice("Unit %s does not exist, proceeding anyway.", *name);
                        }
                }

                r = acquire_bus(BUS_MANAGER, &bus);
                if (r < 0)
                        return r;

                polkit_agent_open_maybe();

                if (streq(verb, "enable")) {
                        method = "EnableUnitFiles";
                        expect_carries_install_info = true;
                } else if (streq(verb, "disable")) {
                        method = "DisableUnitFiles";
                        send_force = false;
                } else if (streq(verb, "reenable")) {
                        method = "ReenableUnitFiles";
                        expect_carries_install_info = true;
                } else if (streq(verb, "link"))
                        method = "LinkUnitFiles";
                else if (streq(verb, "preset")) {

                        if (arg_preset_mode != UNIT_FILE_PRESET_FULL) {
                                method = "PresetUnitFilesWithMode";
                                send_preset_mode = true;
                        } else
                                method = "PresetUnitFiles";

                        expect_carries_install_info = true;
                        ignore_carries_install_info = true;
                } else if (streq(verb, "mask"))
                        method = "MaskUnitFiles";
                else if (streq(verb, "unmask")) {
                        method = "UnmaskUnitFiles";
                        send_force = false;
                } else if (streq(verb, "revert")) {
                        method = "RevertUnitFiles";
                        send_runtime = send_force = false;
                } else
                        assert_not_reached("Unknown verb");

                r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, method);
                if (r < 0)
                        return bus_log_create_error(r);

                r = sd_bus_message_append_strv(m, names);
                if (r < 0)
                        return bus_log_create_error(r);

                if (send_preset_mode) {
                        r = sd_bus_message_append(m, "s", unit_file_preset_mode_to_string(arg_preset_mode));
                        if (r < 0)
                                return bus_log_create_error(r);
                }

                if (send_runtime) {
                        r = sd_bus_message_append(m, "b", arg_runtime);
                        if (r < 0)
                                return bus_log_create_error(r);
                }

                if (send_force) {
                        r = sd_bus_message_append(m, "b", arg_force);
                        if (r < 0)
                                return bus_log_create_error(r);
                }

                r = sd_bus_call(bus, m, 0, &error, &reply);
                if (r < 0)
                        return log_error_errno(r, "Failed to %s unit: %s", verb, bus_error_message(&error, r));

                if (expect_carries_install_info) {
                        r = sd_bus_message_read(reply, "b", &carries_install_info);
                        if (r < 0)
                                return bus_log_parse_error(r);
                }

                r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes);
                if (r < 0)
                        goto finish;

                /* Try to reload if enabled */
                if (!arg_no_reload)
                        r = daemon_reload(argc, argv, userdata);
                else
                        r = 0;
        }

        if (carries_install_info == 0 && !ignore_carries_install_info)
                log_notice("The unit files have no installation config (WantedBy=, RequiredBy=, Also=,\n"
                           "Alias= settings in the [Install] section, and DefaultInstance= for template\n"
                           "units). This means they are not meant to be enabled using systemctl.\n"
                           " \n" /* trick: the space is needed so that the line does not get stripped from output */
                           "Possible reasons for having this kind of units are:\n"
                           "%1$s A unit may be statically enabled by being symlinked from another unit's\n"
                           "  .wants/ or .requires/ directory.\n"
                           "%1$s A unit's purpose may be to act as a helper for some other unit which has\n"
                           "  a requirement dependency on it.\n"
                           "%1$s A unit may be started when needed via activation (socket, path, timer,\n"
                           "  D-Bus, udev, scripted systemctl call, ...).\n"
                           "%1$s In case of template units, the unit is meant to be enabled with some\n"
                           "  instance name specified.",
                           special_glyph(SPECIAL_GLYPH_BULLET));

        if (arg_now && STR_IN_SET(argv[0], "enable", "disable", "mask")) {
                sd_bus *bus;
                size_t len, i;

                r = acquire_bus(BUS_MANAGER, &bus);
                if (r < 0)
                        goto finish;

                len = strv_length(names);
                {
                        char *new_args[len + 2];

                        new_args[0] = (char*) (streq(argv[0], "enable") ? "start" : "stop");
                        for (i = 0; i < len; i++)
                                new_args[i + 1] = basename(names[i]);
                        new_args[i + 1] = NULL;

                        r = start_unit(len + 1, new_args, userdata);
                }
        }

finish:
        unit_file_changes_free(changes, n_changes);

        return r;
}