+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU 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 <http://www.gnu.org/licenses/>.
-***/
-
-#include "unit.h"
-#include "specifier.h"
-#include "strv.h"
-#include "unit-name.h"
-#include "unit-printf.h"
-#include "macro.h"
-#include "cgroup-util.h"
-
-static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- char *n;
-
- assert(u);
-
- n = unit_name_to_prefix_and_instance(u->id);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- char *n;
-
- assert(u);
-
- n = unit_name_to_prefix(u->id);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_prefix_unescaped(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- _cleanup_free_ char *p = NULL;
- char *n;
-
- assert(u);
-
- p = unit_name_to_prefix(u->id);
- if (!p)
- return -ENOMEM;
-
- n = unit_name_unescape(p);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_instance_unescaped(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- char *n;
-
- assert(u);
-
- if (!u->instance)
- return -EOPNOTSUPP;
-
- n = unit_name_unescape(u->instance);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_filename(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- char *n;
-
- assert(u);
-
- if (u->instance)
- n = unit_name_path_unescape(u->instance);
- else
- n = unit_name_to_path(u->id);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_cgroup(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- char *n;
-
- assert(u);
-
- if (u->cgroup_path)
- n = strdup(u->cgroup_path);
- else
- n = unit_default_cgroup_path(u);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_cgroup_root(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- const char *slice;
- char *n;
- int r;
-
- assert(u);
-
- slice = unit_slice_name(u);
- if (specifier == 'R' || !slice)
- n = strdup(u->manager->cgroup_root);
- else {
- _cleanup_free_ char *p = NULL;
-
- r = cg_slice_to_path(slice, &p);
- if (r < 0)
- return r;
-
- n = strjoin(u->manager->cgroup_root, "/", p, NULL);
- if (!n)
- return -ENOMEM;
- }
-
- *ret = n;
- return 0;
-}
-
-static int specifier_runtime(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- const char *e;
- char *n = NULL;
-
- assert(u);
-
- if (u->manager->running_as == SYSTEMD_SYSTEM)
- e = "/run";
- else {
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -EOPNOTSUPP;
- }
-
- n = strdup(e);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) {
- char *printed = NULL;
- Unit *u = userdata;
- ExecContext *c;
- int r = 0;
-
- assert(u);
-
- c = unit_get_exec_context(u);
- if (!c)
- return -EOPNOTSUPP;
-
- if (u->manager->running_as == SYSTEMD_SYSTEM) {
-
- /* We cannot use NSS from PID 1, hence try to make the
- * best of it in that case, and fail if we can't help
- * it */
-
- if (!c->user || streq(c->user, "root") || streq(c->user, "0"))
- printed = strdup(specifier == 'u' ? "root" : "0");
- else {
- if (specifier == 'u')
- printed = strdup(c->user);
- else {
- uid_t uid;
-
- r = parse_uid(c->user, &uid);
- if (r < 0)
- return -ENODATA;
-
- r = asprintf(&printed, UID_FMT, uid);
- }
- }
-
- } else {
- _cleanup_free_ char *tmp = NULL;
- const char *username = NULL;
- uid_t uid;
-
- if (c->user)
- username = c->user;
- else
- /* get USER env from env or our own uid */
- username = tmp = getusername_malloc();
-
- /* fish username from passwd */
- r = get_user_creds(&username, &uid, NULL, NULL, NULL);
- if (r < 0)
- return r;
-
- if (specifier == 'u')
- printed = strdup(username);
- else
- r = asprintf(&printed, UID_FMT, uid);
- }
-
- if (r < 0 || !printed)
- return -ENOMEM;
-
- *ret = printed;
- return 0;
-}
-
-static int specifier_user_home(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- ExecContext *c;
- char *n;
- int r;
-
- assert(u);
-
- c = unit_get_exec_context(u);
- if (!c)
- return -EOPNOTSUPP;
-
- if (u->manager->running_as == SYSTEMD_SYSTEM) {
-
- /* We cannot use NSS from PID 1, hence try to make the
- * best of it if we can, but fail if we can't */
-
- if (!c->user || streq(c->user, "root") || streq(c->user, "0"))
- n = strdup("/root");
- else
- return -EOPNOTSUPP;
-
- } else {
-
- /* return HOME if set, otherwise from passwd */
- if (!c || !c->user) {
- r = get_home_dir(&n);
- if (r < 0)
- return r;
- } else {
- const char *username, *home;
-
- username = c->user;
- r = get_user_creds(&username, NULL, NULL, &home, NULL);
- if (r < 0)
- return r;
-
- n = strdup(home);
- }
- }
-
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-static int specifier_user_shell(char specifier, void *data, void *userdata, char **ret) {
- Unit *u = userdata;
- ExecContext *c;
- char *n;
- int r;
-
- assert(u);
-
- c = unit_get_exec_context(u);
- if (!c)
- return -EOPNOTSUPP;
-
- if (u->manager->running_as == SYSTEMD_SYSTEM) {
-
- /* We cannot use NSS from PID 1, hence try to make the
- * best of it if we can, but fail if we can't */
-
- if (!c->user || streq(c->user, "root") || streq(c->user, "0"))
- n = strdup("/bin/sh");
- else
- return -EOPNOTSUPP;
-
- } else {
-
- /* return /bin/sh for root, otherwise the value from passwd */
- if (!c->user) {
- r = get_shell(&n);
- if (r < 0)
- return r;
- } else {
- const char *username, *shell;
-
- username = c->user;
- r = get_user_creds(&username, NULL, NULL, NULL, &shell);
- if (r < 0)
- return r;
-
- n = strdup(shell);
- }
- }
-
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 0;
-}
-
-int unit_name_printf(Unit *u, const char* format, char **ret) {
-
- /*
- * This will use the passed string as format string and
- * replace the following specifiers:
- *
- * %n: the full id of the unit (foo@bar.waldo)
- * %N: the id of the unit without the suffix (foo@bar)
- * %p: the prefix (foo)
- * %i: the instance (bar)
- */
-
- const Specifier table[] = {
- { 'n', specifier_string, u->id },
- { 'N', specifier_prefix_and_instance, NULL },
- { 'p', specifier_prefix, NULL },
- { 'i', specifier_string, u->instance },
- { 0, NULL, NULL }
- };
-
- assert(u);
- assert(format);
- assert(ret);
-
- return specifier_printf(format, table, u, ret);
-}
-
-int unit_full_printf(Unit *u, const char *format, char **ret) {
-
- /* This is similar to unit_name_printf() but also supports
- * unescaping. Also, adds a couple of additional codes:
- *
- * %f the instance if set, otherwise the id
- * %c cgroup path of unit
- * %r where units in this slice are placed in the cgroup tree
- * %R the root of this systemd's instance tree
- * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR)
- * %U the UID of the configured user or running user
- * %u the username of the configured user or running user
- * %h the homedir of the configured user or running user
- * %s the shell of the configured user or running user
- * %m the machine ID of the running system
- * %H the host name of the running system
- * %b the boot ID of the running system
- * %v `uname -r` of the running system
- */
-
- const Specifier table[] = {
- { 'n', specifier_string, u->id },
- { 'N', specifier_prefix_and_instance, NULL },
- { 'p', specifier_prefix, NULL },
- { 'P', specifier_prefix_unescaped, NULL },
- { 'i', specifier_string, u->instance },
- { 'I', specifier_instance_unescaped, NULL },
-
- { 'f', specifier_filename, NULL },
- { 'c', specifier_cgroup, NULL },
- { 'r', specifier_cgroup_root, NULL },
- { 'R', specifier_cgroup_root, NULL },
- { 't', specifier_runtime, NULL },
- { 'U', specifier_user_name, NULL },
- { 'u', specifier_user_name, NULL },
- { 'h', specifier_user_home, NULL },
- { 's', specifier_user_shell, NULL },
-
- { 'm', specifier_machine_id, NULL },
- { 'H', specifier_host_name, NULL },
- { 'b', specifier_boot_id, NULL },
- { 'v', specifier_kernel_release, NULL },
- {}
- };
-
- assert(u);
- assert(format);
- assert(ret);
-
- return specifier_printf(format, table, u, ret);
-}
-
-int unit_full_printf_strv(Unit *u, char **l, char ***ret) {
- size_t n;
- char **r, **i, **j;
- int q;
-
- /* Applies unit_full_printf to every entry in l */
-
- assert(u);
-
- n = strv_length(l);
- r = new(char*, n+1);
- if (!r)
- return -ENOMEM;
-
- for (i = l, j = r; *i; i++, j++) {
- q = unit_full_printf(u, *i, j);
- if (q < 0)
- goto fail;
- }
-
- *j = NULL;
- *ret = r;
- return 0;
-
-fail:
- for (j--; j >= r; j--)
- free(*j);
-
- free(r);
- return q;
-}
~ianmdlvl / elogind.git / blobdiff