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From 09ef95a2eed48b4eb7488788a1b655d67eafe783 Mon Sep 17 00:00:00 2001
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From: Chris Lumens <clumens@redhat.com>
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Date: Tue, 30 Nov 2021 14:47:12 -0500
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Subject: [PATCH] Low: libcrmservice: Handle systemd service templates.
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These unit files (which have an @ sign at the end) expect to be
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parameterized by an instance name. Not providing an instance name
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causes the dbus lookup to fail, and we fall back to assume this is an
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LSB service. If the user doesn't provide an instance name, just add a
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fake one. It doesn't seem to matter what name is given for the lookup.
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See: rhbz#2003151
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---
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lib/services/systemd.c | 22 ++++++++++++++++------
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1 file changed, 16 insertions(+), 6 deletions(-)
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diff --git a/lib/services/systemd.c b/lib/services/systemd.c
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index 8e9fff484..27a3b376d 100644
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--- a/lib/services/systemd.c
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+++ b/lib/services/systemd.c
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@@ -206,17 +206,27 @@ systemd_unit_extension(const char *name)
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}
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static char *
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-systemd_service_name(const char *name)
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+systemd_service_name(const char *name, bool add_instance_name)
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{
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- if (name == NULL) {
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+ if (pcmk__str_empty(name)) {
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return NULL;
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}
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if (systemd_unit_extension(name)) {
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return strdup(name);
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- }
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- return crm_strdup_printf("%s.service", name);
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+ /* Services that end with an @ sign are systemd templates. They expect an
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+ * instance name to follow the service name. If no instance name was
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+ * provided, just add "x" to the string as the instance name. It doesn't
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+ * seem to matter for purposes of looking up whether a service exists or
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+ * not.
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+ */
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+ } else if (add_instance_name && *(name+strlen(name)-1) == '@') {
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+ return crm_strdup_printf("%sx.service", name);
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+
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+ } else {
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+ return crm_strdup_printf("%s.service", name);
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+ }
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}
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static void
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@@ -427,7 +437,7 @@ invoke_unit_by_name(const char *arg_name, svc_action_t *op, char **path)
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CRM_ASSERT(msg != NULL);
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// Add the (expanded) unit name as the argument
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- name = systemd_service_name(arg_name);
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+ name = systemd_service_name(arg_name, op == NULL || pcmk__str_eq(op->action, "meta-data", pcmk__str_none));
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CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name,
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DBUS_TYPE_INVALID));
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free(name);
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@@ -944,7 +954,7 @@ invoke_unit_by_path(svc_action_t *op, const char *unit)
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/* (ss) */
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{
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const char *replace_s = "replace";
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- char *name = systemd_service_name(op->agent);
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+ char *name = systemd_service_name(op->agent, pcmk__str_eq(op->action, "meta-data", pcmk__str_none));
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CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID));
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CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &replace_s, DBUS_TYPE_INVALID));
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--
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2.27.0
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