1 files changed, 133 insertions, 0 deletions
diff --git a/src/libshared/install-printf.c b/src/libshared/install-printf.c
new file mode 100644
index 0000000000..88143361da
--- /dev/null
+++ b/src/libshared/install-printf.c
@@ -0,0 +1,133 @@
+/***
+  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 <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "formats-util.h"
+#include "install-printf.h"
+#include "install.h"
+#include "macro.h"
+#include "specifier.h"
+#include "unit-name.h"
+#include "user-util.h"
+
+static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
+        UnitFileInstallInfo *i = userdata;
+
+        assert(i);
+
+        return unit_name_to_prefix_and_instance(i->name, ret);
+}
+
+static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) {
+        UnitFileInstallInfo *i = userdata;
+
+        assert(i);
+
+        return unit_name_to_prefix(i->name, ret);
+}
+
+static int specifier_instance(char specifier, void *data, void *userdata, char **ret) {
+        UnitFileInstallInfo *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) {
+        char *t;
+
+        /* If we are UID 0 (root), this will not result in NSS,
+         * otherwise it might. This is good, as we want to be able to
+         * run this in PID 1, where our user ID is 0, but where NSS
+         * lookups are not allowed. */
+
+        t = getusername_malloc();
+        if (!t)
+                return -ENOMEM;
+
+        *ret = t;
+        return 0;
+}
+
+static int specifier_user_id(char specifier, void *data, void *userdata, char **ret) {
+
+        if (asprintf(ret, UID_FMT, getuid()) < 0)
+                return -ENOMEM;
+
+        return 0;
+}
+
+int install_full_printf(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_string,              i->name },
+                { 'N', specifier_prefix_and_instance, NULL },
+                { 'p', specifier_prefix,              NULL },
+                { 'i', specifier_instance,            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);
+}