Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 368 insertions, 0 deletions

diff --git a/src/systemctl/systemctl-edit.c b/src/systemctl/systemctl-edit.c
new file mode 100644
index 0000000..367afa2
--- /dev/null
+++ b/src/systemctl/systemctl-edit.c
@@ -0,0 +1,368 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "bus-error.h"
+#include "edit-util.h"
+#include "fs-util.h"
+#include "pager.h"
+#include "path-util.h"
+#include "pretty-print.h"
+#include "selinux-util.h"
+#include "systemctl-daemon-reload.h"
+#include "systemctl-edit.h"
+#include "systemctl-util.h"
+#include "systemctl.h"
+#include "terminal-util.h"
+
+int verb_cat(int argc, char *argv[], void *userdata) {
+        _cleanup_hashmap_free_ Hashmap *cached_name_map = NULL, *cached_id_map = NULL;
+        _cleanup_(lookup_paths_free) LookupPaths lp = {};
+        _cleanup_strv_free_ char **names = NULL;
+        sd_bus *bus;
+        bool first = true;
+        int r, rc = 0;
+
+        /* Include all units by default — i.e. continue as if the --all option was used */
+        if (strv_isempty(arg_states))
+                arg_all = true;
+
+        if (arg_transport != BUS_TRANSPORT_LOCAL)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot remotely cat units.");
+
+        r = lookup_paths_init_or_warn(&lp, arg_runtime_scope, 0, arg_root);
+        if (r < 0)
+                return r;
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        r = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to expand names: %m");
+
+        r = maybe_extend_with_unit_dependencies(bus, &names);
+        if (r < 0)
+                return r;
+
+        pager_open(arg_pager_flags);
+
+        STRV_FOREACH(name, names) {
+                _cleanup_free_ char *fragment_path = NULL;
+                _cleanup_strv_free_ char **dropin_paths = NULL;
+
+                r = unit_find_paths(bus, *name, &lp, false, &cached_name_map, &cached_id_map, &fragment_path, &dropin_paths);
+                if (r == -ERFKILL) {
+                        printf("%s# Unit %s is masked%s.\n",
+                               ansi_highlight_magenta(),
+                               *name,
+                               ansi_normal());
+                        continue;
+                }
+                if (r == -EKEYREJECTED) {
+                        printf("%s# Unit %s could not be loaded.%s\n",
+                               ansi_highlight_magenta(),
+                               *name,
+                               ansi_normal());
+                        continue;
+                }
+                if (r < 0)
+                        return r;
+                if (r == 0) {
+                        /* Skip units which have no on-disk counterpart, but propagate the error to the
+                         * user */
+                        rc = -ENOENT;
+                        continue;
+                }
+
+                if (first)
+                        first = false;
+                else
+                        puts("");
+
+                if (need_daemon_reload(bus, *name) > 0) /* ignore errors (<0), this is informational output */
+                        fprintf(stderr,
+                                "%s# Warning: %s changed on disk, the version systemd has loaded is outdated.\n"
+                                "%s# This output shows the current version of the unit's original fragment and drop-in files.\n"
+                                "%s# If fragments or drop-ins were added or removed, they are not properly reflected in this output.\n"
+                                "%s# Run 'systemctl%s daemon-reload' to reload units.%s\n",
+                                ansi_highlight_red(),
+                                *name,
+                                ansi_highlight_red(),
+                                ansi_highlight_red(),
+                                ansi_highlight_red(),
+                                arg_runtime_scope == RUNTIME_SCOPE_SYSTEM ? "" : " --user",
+                                ansi_normal());
+
+                r = cat_files(fragment_path, dropin_paths, /* flags= */ CAT_FORMAT_HAS_SECTIONS);
+                if (r < 0)
+                        return r;
+        }
+
+        return rc;
+}
+
+static int get_file_to_edit(
+                const LookupPaths *lp,
+                const char *name,
+                char **ret_path) {
+
+        _cleanup_free_ char *path = NULL;
+
+        assert(lp);
+        assert(name);
+        assert(ret_path);
+
+        path = path_join(lp->persistent_config, name);
+        if (!path)
+                return log_oom();
+
+        if (arg_runtime) {
+                _cleanup_free_ char *run = NULL;
+
+                run = path_join(lp->runtime_config, name);
+                if (!run)
+                        return log_oom();
+
+                if (access(path, F_OK) >= 0)
+                        return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
+                                               "Refusing to create \"%s\" because it would be overridden by \"%s\" anyway.",
+                                               run, path);
+
+                *ret_path = TAKE_PTR(run);
+        } else
+                *ret_path = TAKE_PTR(path);
+
+        return 0;
+}
+
+static int unit_file_create_new(
+                EditFileContext *context,
+                const LookupPaths *lp,
+                const char *unit_name,
+                const char *suffix,
+                char * const *original_unit_paths) {
+
+        _cleanup_free_ char *unit = NULL, *new_path = NULL;
+        int r;
+
+        assert(context);
+        assert(lp);
+        assert(unit_name);
+
+        unit = strjoin(unit_name, suffix);
+        if (!unit)
+                return log_oom();
+
+        r = get_file_to_edit(lp, unit, &new_path);
+        if (r < 0)
+                return r;
+
+        return edit_files_add(context, new_path, NULL, original_unit_paths);
+}
+
+static int unit_file_create_copy(
+                EditFileContext *context,
+                const LookupPaths *lp,
+                const char *unit_name,
+                const char *fragment_path) {
+
+        _cleanup_free_ char *new_path = NULL;
+        int r;
+
+        assert(context);
+        assert(lp);
+        assert(fragment_path);
+        assert(unit_name);
+
+        r = get_file_to_edit(lp, unit_name, &new_path);
+        if (r < 0)
+                return r;
+
+        if (!path_equal(fragment_path, new_path) && access(new_path, F_OK) >= 0) {
+                char response;
+
+                r = ask_char(&response, "yn", "\"%s\" already exists. Overwrite with \"%s\"? [(y)es, (n)o] ", new_path, fragment_path);
+                if (r < 0)
+                        return r;
+
+                if (response != 'y')
+                        return log_warning_errno(SYNTHETIC_ERRNO(EKEYREJECTED), "%s skipped.", unit_name);
+        }
+
+        return edit_files_add(context, new_path, fragment_path, NULL);
+}
+
+static int find_paths_to_edit(
+                sd_bus *bus,
+                EditFileContext *context,
+                char **names) {
+
+        _cleanup_hashmap_free_ Hashmap *cached_name_map = NULL, *cached_id_map = NULL;
+        _cleanup_(lookup_paths_free) LookupPaths lp = {};
+        _cleanup_free_ char *drop_in_alloc = NULL, *suffix = NULL;
+        const char *drop_in;
+        int r;
+
+        assert(bus);
+        assert(context);
+        assert(names);
+
+        if (isempty(arg_drop_in))
+                drop_in = "override.conf";
+        else if (!endswith(arg_drop_in, ".conf")) {
+                drop_in_alloc = strjoin(arg_drop_in, ".conf");
+                if (!drop_in_alloc)
+                        return log_oom();
+
+                drop_in = drop_in_alloc;
+        } else
+                drop_in = arg_drop_in;
+
+        if (!filename_is_valid(drop_in))
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid drop-in file name '%s'.", drop_in);
+
+        suffix = strjoin(".d/", drop_in);
+        if (!suffix)
+                return log_oom();
+
+        r = lookup_paths_init(&lp, arg_runtime_scope, 0, arg_root);
+        if (r < 0)
+                return r;
+
+        STRV_FOREACH(name, names) {
+                _cleanup_free_ char *path = NULL;
+                _cleanup_strv_free_ char **unit_paths = NULL;
+
+                r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ false, &cached_name_map, &cached_id_map, &path, &unit_paths);
+                if (r == -EKEYREJECTED) {
+                        /* If loading of the unit failed server side complete, then the server won't tell us
+                         * the unit file path. In that case, find the file client side. */
+
+                        log_debug_errno(r, "Unit '%s' was not loaded correctly, retrying client-side.", *name);
+                        r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ true, &cached_name_map, &cached_id_map, &path, &unit_paths);
+                }
+                if (r == -ERFKILL)
+                        return log_error_errno(r, "Unit '%s' masked, cannot edit.", *name);
+                if (r < 0)
+                        return r; /* Already logged by unit_find_paths() */
+
+                if (!path) {
+                        if (!arg_force) {
+                                log_info("Run 'systemctl edit%s --force --full %s' to create a new unit.",
+                                         arg_runtime_scope == RUNTIME_SCOPE_GLOBAL ? " --global" :
+                                         arg_runtime_scope == RUNTIME_SCOPE_USER ? " --user" : "",
+                                         *name);
+                                return -ENOENT;
+                        }
+
+                        /* Create a new unit from scratch */
+                        r = unit_file_create_new(
+                                        context,
+                                        &lp,
+                                        *name,
+                                        arg_full ? NULL : suffix,
+                                        NULL);
+                } else {
+                        _cleanup_free_ char *unit_name = NULL;
+
+                        r = path_extract_filename(path, &unit_name);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to extract unit name from path '%s': %m", path);
+
+                        /* We follow unit aliases, but we need to propagate the instance */
+                        if (unit_name_is_valid(*name, UNIT_NAME_INSTANCE) &&
+                            unit_name_is_valid(unit_name, UNIT_NAME_TEMPLATE)) {
+                                _cleanup_free_ char *instance = NULL, *tmp_name = NULL;
+
+                                r = unit_name_to_instance(*name, &instance);
+                                if (r < 0)
+                                        return r;
+
+                                r = unit_name_replace_instance(unit_name, instance, &tmp_name);
+                                if (r < 0)
+                                        return r;
+
+                                free_and_replace(unit_name, tmp_name);
+                        }
+
+                        if (arg_full)
+                                r = unit_file_create_copy(
+                                                context,
+                                                &lp,
+                                                unit_name,
+                                                path);
+                        else {
+                                r = strv_prepend(&unit_paths, path);
+                                if (r < 0)
+                                        return log_oom();
+
+                                r = unit_file_create_new(
+                                                context,
+                                                &lp,
+                                                unit_name,
+                                                suffix,
+                                                unit_paths);
+                        }
+                }
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int verb_edit(int argc, char *argv[], void *userdata) {
+        _cleanup_(edit_file_context_done) EditFileContext context = {
+                .marker_start = DROPIN_MARKER_START,
+                .marker_end = DROPIN_MARKER_END,
+                .remove_parent = !arg_full,
+                .overwrite_with_origin = true,
+        };
+        _cleanup_strv_free_ char **names = NULL;
+        sd_bus *bus;
+        int r;
+
+        if (!on_tty())
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit units if not on a tty.");
+
+        if (arg_transport != BUS_TRANSPORT_LOCAL)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit units remotely.");
+
+        r = mac_init();
+        if (r < 0)
+                return r;
+
+        r = acquire_bus(BUS_MANAGER, &bus);
+        if (r < 0)
+                return r;
+
+        r = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to expand names: %m");
+        if (strv_isempty(names))
+                return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "No units matched the specified patterns.");
+
+        STRV_FOREACH(tmp, names) {
+                r = unit_is_masked(bus, *tmp);
+                if (r < 0)
+                        return r;
+                if (r > 0)
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit %s: unit is masked.", *tmp);
+        }
+
+        r = find_paths_to_edit(bus, &context, names);
+        if (r < 0)
+                return r;
+
+        r = do_edit_files_and_install(&context);
+        if (r < 0)
+                return r;
+
+        if (!arg_no_reload && !install_client_side()) {
+                r = daemon_reload(ACTION_RELOAD, /* graceful= */ false);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}