1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include "systemd/sd-id128.h"
24 #include "specifier.h"
25 #include "path-util.h"
27 #include "unit-name.h"
28 #include "unit-printf.h"
30 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
34 return unit_name_to_prefix_and_instance(u->id);
37 static char *specifier_prefix(char specifier, void *data, void *userdata) {
41 return unit_name_to_prefix(u->id);
44 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
50 p = unit_name_to_prefix(u->id);
54 r = unit_name_unescape(p);
60 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
65 return unit_name_unescape(u->instance);
70 static char *specifier_filename(char specifier, void *data, void *userdata) {
75 return unit_name_path_unescape(u->instance);
77 return unit_name_to_path(u->id);
80 static char *specifier_cgroup(char specifier, void *data, void *userdata) {
84 return unit_default_cgroup_path(u);
87 static char *specifier_cgroup_root(char specifier, void *data, void *userdata) {
93 return strdup(u->manager->cgroup_hierarchy);
95 if (path_get_parent(u->manager->cgroup_hierarchy, &p) < 0)
106 static char *specifier_runtime(char specifier, void *data, void *userdata) {
110 if (u->manager->running_as == SYSTEMD_USER) {
113 e = getenv("XDG_RUNTIME_DIR");
118 return strdup("/run");
121 static char *specifier_user_name(char specifier, void *data, void *userdata) {
125 const char *username;
129 c = unit_get_exec_context(u);
133 /* get USER env from our own env if set */
135 return getusername_malloc();
137 /* fish username from passwd */
139 r = get_user_creds(&username, NULL, NULL, NULL, NULL);
143 return strdup(username);
146 static char *specifier_user_home(char specifier, void *data, void *userdata) {
150 const char *username, *home;
154 c = unit_get_exec_context(u);
158 /* return HOME if set, otherwise from passwd */
162 r = get_home_dir(&h);
170 r = get_user_creds(&username, NULL, NULL, &home, NULL);
177 static char *specifier_user_shell(char specifier, void *data, void *userdata) {
181 const char *username, *shell;
185 c = unit_get_exec_context(u);
189 /* return HOME if set, otherwise from passwd */
195 return strdup("/bin/sh");
201 r = get_user_creds(&username, NULL, NULL, NULL, &shell);
203 return strdup("/bin/sh");
205 return strdup(shell);
208 static char *specifier_machine_id(char specifier, void *data, void *userdata) {
213 r = sd_id128_get_machine(&id);
221 return sd_id128_to_string(id, buf);
224 static char *specifier_boot_id(char specifier, void *data, void *userdata) {
229 r = sd_id128_get_boot(&id);
237 return sd_id128_to_string(id, buf);
240 static char *specifier_host_name(char specifier, void *data, void *userdata) {
241 return gethostname_malloc();
244 char *unit_name_printf(Unit *u, const char* format) {
247 * This will use the passed string as format string and
248 * replace the following specifiers:
250 * %n: the full id of the unit (foo@bar.waldo)
251 * %N: the id of the unit without the suffix (foo@bar)
252 * %p: the prefix (foo)
253 * %i: the instance (bar)
256 const Specifier table[] = {
257 { 'n', specifier_string, u->id },
258 { 'N', specifier_prefix_and_instance, NULL },
259 { 'p', specifier_prefix, NULL },
260 { 'i', specifier_string, u->instance },
267 return specifier_printf(format, table, u);
270 char *unit_full_printf(Unit *u, const char *format) {
272 /* This is similar to unit_name_printf() but also supports
273 * unescaping. Also, adds a couple of additional codes:
275 * %f the the instance if set, otherwise the id
276 * %c cgroup path of unit
277 * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711")
278 * %R parent of root cgroup path (e.g. "/usr/lennart/shared")
279 * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR)
280 * %u the username of the configured user or running user
281 * %h the homedir of the configured user or running user
282 * %s the shell of the configured user or running user
283 * %m the machine ID of the running system
284 * %b the boot ID of the running system
285 * %H the host name of the running system
288 const Specifier table[] = {
289 { 'n', specifier_string, u->id },
290 { 'N', specifier_prefix_and_instance, NULL },
291 { 'p', specifier_prefix, NULL },
292 { 'P', specifier_prefix_unescaped, NULL },
293 { 'i', specifier_string, u->instance },
294 { 'I', specifier_instance_unescaped, NULL },
296 { 'f', specifier_filename, NULL },
297 { 'c', specifier_cgroup, NULL },
298 { 'r', specifier_cgroup_root, NULL },
299 { 'R', specifier_cgroup_root, NULL },
300 { 't', specifier_runtime, NULL },
301 { 'u', specifier_user_name, NULL },
302 { 'h', specifier_user_home, NULL },
303 { 's', specifier_user_shell, NULL },
305 { 'm', specifier_machine_id, NULL },
306 { 'H', specifier_host_name, NULL },
307 { 'b', specifier_boot_id, NULL },
314 return specifier_printf(format, table, u);
317 char **unit_full_printf_strv(Unit *u, char **l) {
321 /* Applies unit_full_printf to every entry in l */
330 for (i = l, j = r; *i; i++, j++) {
331 *j = unit_full_printf(u, *i);
340 for (j--; j >= r; j--)