/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Zbigniew Jędrzejewski-Szmek
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 <assert.h>
#include <stdlib.h>
#include "specifier.h"
#include "unit-name.h"
#include "util.h"
#include "install-printf.h"
static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
InstallInfo *i = userdata;
char *n;
assert(i);
n = unit_name_to_prefix_and_instance(i->name);
if (!n)
return -ENOMEM;
*ret = n;
return 0;
}
static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) {
InstallInfo *i = userdata;
char *n;
assert(i);
n = unit_name_to_prefix(i->name);
if (!n)
return -ENOMEM;
*ret = n;
return 0;
}
static int specifier_instance(char specifier, void *data, void *userdata, char **ret) {
InstallInfo *i = userdata;
char *instance;
int r;
assert(i);
r = unit_name_to_instance(i->name, &instance);
if (r < 0)
return r;
if (!instance) {
instance = strdup("");
if (!instance)
return -ENOMEM;
}
*ret = instance;
return 0;
}
static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) {
InstallInfo *i = userdata;
const char *username;
_cleanup_free_ char *tmp = NULL;
char *printed = NULL;
assert(i);
if (i->user)
username = i->user;
else
/* get USER env from env or our own uid */
username = tmp = getusername_malloc();
switch (specifier) {
case 'u':
printed = strdup(username);
break;
case 'U': {
/* fish username from passwd */
uid_t uid;
int r;
r = get_user_creds(&username, &uid, NULL, NULL, NULL);
if (r < 0)
return r;
if (asprintf(&printed, "%d", uid) < 0)
return -ENOMEM;
break;
}}
*ret = printed;
return 0;
}
int install_full_printf(InstallInfo *i, const char *format, char **ret) {
/* This is similar to unit_full_printf() but does not support
* anything path-related.
*
* %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)
* %U the UID of the configured user or running user
* %u the username 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, i->name },
{ 'N', specifier_prefix_and_instance, NULL },
{ 'p', specifier_prefix, NULL },
{ 'i', specifier_instance, NULL },
{ 'U', specifier_user_name, NULL },
{ 'u', specifier_user_name, NULL },
{ 'm', specifier_machine_id, NULL },
{ 'H', specifier_host_name, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'v', specifier_kernel_release, NULL },
{}
};
assert(i);
assert(format);
assert(ret);
return specifier_printf(format, table, i, ret);
}