146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include "formats-util.h"
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#include "install-printf.h"
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#include "specifier.h"
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#include "unit-name.h"
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#include "user-util.h"
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#include "util.h"
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static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
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UnitFileInstallInfo *i = userdata;
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assert(i);
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return unit_name_to_prefix_and_instance(i->name, ret);
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}
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static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) {
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UnitFileInstallInfo *i = userdata;
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assert(i);
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return unit_name_to_prefix(i->name, ret);
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}
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static int specifier_instance(char specifier, void *data, void *userdata, char **ret) {
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UnitFileInstallInfo *i = userdata;
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char *instance;
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int r;
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assert(i);
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r = unit_name_to_instance(i->name, &instance);
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if (r < 0)
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return r;
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if (!instance) {
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instance = strdup("");
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if (!instance)
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return -ENOMEM;
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}
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*ret = instance;
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return 0;
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}
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static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) {
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UnitFileInstallInfo *i = userdata;
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const char *username;
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_cleanup_free_ char *tmp = NULL;
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char *printed = NULL;
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assert(i);
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if (i->user)
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username = i->user;
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else
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/* get USER env from env or our own uid */
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username = tmp = getusername_malloc();
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switch (specifier) {
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case 'u':
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printed = strdup(username);
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break;
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case 'U': {
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/* fish username from passwd */
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uid_t uid;
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int r;
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r = get_user_creds(&username, &uid, NULL, NULL, NULL);
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if (r < 0)
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return r;
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if (asprintf(&printed, UID_FMT, uid) < 0)
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return -ENOMEM;
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break;
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}}
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*ret = printed;
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return 0;
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}
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int install_full_printf(UnitFileInstallInfo *i, const char *format, char **ret) {
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/* This is similar to unit_full_printf() but does not support
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* anything path-related.
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*
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* %n: the full id of the unit (foo@bar.waldo)
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* %N: the id of the unit without the suffix (foo@bar)
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* %p: the prefix (foo)
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* %i: the instance (bar)
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* %U the UID of the configured user or running user
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* %u the username of the configured user or running user
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* %m the machine ID of the running system
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* %H the host name of the running system
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* %b the boot ID of the running system
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* %v `uname -r` of the running system
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*/
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const Specifier table[] = {
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{ 'n', specifier_string, i->name },
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{ 'N', specifier_prefix_and_instance, NULL },
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{ 'p', specifier_prefix, NULL },
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{ 'i', specifier_instance, NULL },
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{ 'U', specifier_user_name, NULL },
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{ 'u', specifier_user_name, NULL },
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{ 'm', specifier_machine_id, NULL },
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{ 'H', specifier_host_name, NULL },
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{ 'b', specifier_boot_id, NULL },
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{ 'v', specifier_kernel_release, NULL },
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{}
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};
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assert(i);
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assert(format);
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assert(ret);
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return specifier_printf(format, table, i, ret);
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}
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