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-rw-r--r--src/shared/install-printf.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/src/shared/install-printf.c b/src/shared/install-printf.c
new file mode 100644
index 0000000..e2a4a48
--- /dev/null
+++ b/src/shared/install-printf.c
@@ -0,0 +1,125 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#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 char *root, const void *userdata, char **ret) {
+ const InstallInfo *i = ASSERT_PTR(userdata);
+ _cleanup_free_ char *prefix = NULL;
+ int r;
+
+ 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 char *root, const void *userdata, char **ret) {
+ const InstallInfo *i = ASSERT_PTR(userdata);
+ char *ans;
+
+ 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 char *root, const void *userdata, char **ret) {
+ const InstallInfo *i = ASSERT_PTR(userdata);
+
+ return unit_name_to_prefix(i->name, ret);
+}
+
+static int specifier_instance(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
+ const InstallInfo *i = ASSERT_PTR(userdata);
+ char *instance;
+ int r;
+
+ 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 char *root, const void *userdata, char **ret) {
+ _cleanup_free_ char *prefix = NULL;
+ char *dash;
+ int r;
+
+ assert(ret);
+
+ r = specifier_prefix(specifier, data, root, 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_name_printf(
+ LookupScope scope,
+ const InstallInfo *info,
+ const char *format,
+ char **ret) {
+ /* This is similar to unit_name_printf() */
+
+ const Specifier table[] = {
+ { 'i', specifier_instance, NULL },
+ { 'j', specifier_last_component, NULL },
+ { 'n', specifier_name, NULL },
+ { 'N', specifier_prefix_and_instance, NULL },
+ { 'p', specifier_prefix, NULL },
+
+ COMMON_SYSTEM_SPECIFIERS,
+
+ COMMON_CREDS_SPECIFIERS(scope),
+ {}
+ };
+
+ assert(info);
+ assert(format);
+ assert(ret);
+
+ return specifier_printf(format, UNIT_NAME_MAX, table, info->root, info, ret);
+}