systemctl: split up humungous systemctl.c file

This is just some refactoring: shifting around of code, not change in
codeflow.

This splits up the way too huge systemctl.c in multiple more easily
digestable files. It roughly follows the rule that each family of verbs
gets its own .c/.h file pair, and so do all the compat executable names
we support. Plus three extra files for sysv compat (which existed before
already, but I renamed slightly, to get the systemctl- prefix lik
everything else), a -util file with generic stuff everything uses, and a
-logind file with everything that talks directly to logind instead of
PID1.

systemctl is still a bit too complex for my taste, but I think this way
itc omes in a more digestable bits at least.

No change of behaviour, just reshuffling of some code.

1 files changed, 154 insertions, 0 deletions

diff --git a/src/systemctl/systemctl-set-environment.c b/src/systemctl/systemctl-set-environment.c
new file mode 100644
index 0000000000..462924f5c9
--- /dev/null
+++ b/src/systemctl/systemctl-set-environment.c
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "env-util.h"
+#include "escape.h"
+#include "systemctl-set-environment.h"
+#include "systemctl-util.h"
+#include "systemctl.h"
+
+static int print_variable(const char *s) {
+        const char *sep;
+        _cleanup_free_ char *esc = NULL;
+
+        sep = strchr(s, '=');
+        if (!sep)
+                return log_error_errno(SYNTHETIC_ERRNO(EUCLEAN),
+                                       "Invalid environment block");
+
+        esc = shell_maybe_quote(sep + 1, ESCAPE_POSIX);
+        if (!esc)
+                return log_oom();
+
+        printf("%.*s=%s\n", (int)(sep-s), s, esc);
+        return 0;
+}
+
+int show_environment(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+        const char *text;
+        sd_bus *bus;
+        int r;
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        (void) pager_open(arg_pager_flags);
+
+        r = bus_get_property(bus, bus_systemd_mgr, "Environment", &error, &reply, "as");
+        if (r < 0)
+                return log_error_errno(r, "Failed to get environment: %s", bus_error_message(&error, r));
+
+        r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "s");
+        if (r < 0)
+                return bus_log_parse_error(r);
+
+        while ((r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &text)) > 0) {
+                r = print_variable(text);
+                if (r < 0)
+                        return r;
+        }
+        if (r < 0)
+                return bus_log_parse_error(r);
+
+        r = sd_bus_message_exit_container(reply);
+        if (r < 0)
+                return bus_log_parse_error(r);
+
+        return 0;
+}
+
+int set_environment(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+        const char *method;
+        sd_bus *bus;
+        int r;
+
+        assert(argc > 1);
+        assert(argv);
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        polkit_agent_open_maybe();
+
+        method = streq(argv[0], "set-environment")
+                ? "SetEnvironment"
+                : "UnsetEnvironment";
+
+        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, method);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_message_append_strv(m, strv_skip(argv, 1));
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_call(bus, m, 0, &error, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to set environment: %s", bus_error_message(&error, r));
+
+        return 0;
+}
+
+int import_environment(int argc, char *argv[], void *userdata) {
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+        sd_bus *bus;
+        int r;
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        polkit_agent_open_maybe();
+
+        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "SetEnvironment");
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        if (argc < 2)
+                r = sd_bus_message_append_strv(m, environ);
+        else {
+                char **a, **b;
+
+                r = sd_bus_message_open_container(m, 'a', "s");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                STRV_FOREACH(a, strv_skip(argv, 1)) {
+
+                        if (!env_name_is_valid(*a))
+                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Not a valid environment variable name: %s", *a);
+
+                        STRV_FOREACH(b, environ) {
+                                const char *eq;
+
+                                eq = startswith(*b, *a);
+                                if (eq && *eq == '=') {
+
+                                        r = sd_bus_message_append(m, "s", *b);
+                                        if (r < 0)
+                                                return bus_log_create_error(r);
+
+                                        break;
+                                }
+                        }
+                }
+
+                r = sd_bus_message_close_container(m);
+        }
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_call(bus, m, 0, &error, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to import environment: %s", bus_error_message(&error, r));
+
+        return 0;
+}