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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include "format-util.h"
#include "install-printf.h"
#include "install.h"
#include "macro.h"
#include "specifier.h"
#include "string-util.h"
#include "unit-name.h"
#include "user-util.h"
static int specifier_prefix_and_instance(char specifier, const void *data, const void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
_cleanup_free_ char *prefix = NULL;
int r;
assert(i);
r = unit_name_to_prefix_and_instance(i->name, &prefix);
if (r < 0)
return r;
if (endswith(prefix, "@") && i->default_instance) {
char *ans;
ans = strjoin(prefix, i->default_instance);
if (!ans)
return -ENOMEM;
*ret = ans;
} else
*ret = TAKE_PTR(prefix);
return 0;
}
static int specifier_name(char specifier, const void *data, const void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
char *ans;
assert(i);
if (unit_name_is_valid(i->name, UNIT_NAME_TEMPLATE) && i->default_instance)
return unit_name_replace_instance(i->name, i->default_instance, ret);
ans = strdup(i->name);
if (!ans)
return -ENOMEM;
*ret = ans;
return 0;
}
static int specifier_prefix(char specifier, const void *data, const void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
assert(i);
return unit_name_to_prefix(i->name, ret);
}
static int specifier_instance(char specifier, const void *data, const void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
char *instance;
int r;
assert(i);
r = unit_name_to_instance(i->name, &instance);
if (r < 0)
return r;
if (isempty(instance)) {
r = free_and_strdup(&instance, strempty(i->default_instance));
if (r < 0)
return r;
}
*ret = instance;
return 0;
}
static int specifier_last_component(char specifier, const void *data, const void *userdata, char **ret) {
_cleanup_free_ char *prefix = NULL;
char *dash;
int r;
r = specifier_prefix(specifier, data, userdata, &prefix);
if (r < 0)
return r;
dash = strrchr(prefix, '-');
if (dash) {
dash = strdup(dash + 1);
if (!dash)
return -ENOMEM;
*ret = dash;
} else
*ret = TAKE_PTR(prefix);
return 0;
}
int install_full_printf(const UnitFileInstallInfo *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 running user
* %u the username of 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_name, NULL },
{ 'N', specifier_prefix_and_instance, NULL },
{ 'p', specifier_prefix, NULL },
{ 'i', specifier_instance, NULL },
{ 'j', specifier_last_component, NULL },
{ 'g', specifier_group_name, NULL },
{ 'G', specifier_group_id, NULL },
{ 'U', specifier_user_id, 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);
}
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