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systemctl: support --global and --root in edit and cat

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Make bus acquisition conditional in verb_edit() and verb_cat(), following
the same pattern used in verb_enable(). When install_client_side() returns
non-zero (indicating --global, --root, offline, or similar scenarios), skip
acquiring a D-Bus connection and perform all operations client-side.

Changes:
- Only acquire bus when install_client_side() returns NO
- Use mangle_names() instead of expand_unit_names() in client-side mode
- Pass force_client_side flag based on bus availability
- Skip bus-dependent operations (need_daemon_reload, etc.) when bus is NULL

This allows 'systemctl edit --global' and 'systemctl cat --global' to work
correctly, fixing the regression introduced by commit d77d42ed3a.

Test cases added to verify:
- Creating and editing global user units with --runtime
- Reading global units with cat --global
- Proper detection and rejection of masked units in client-side mode
- Tests use /run/ instead of /etc/ for safer temporary testing

Fixes https://github.com/systemd/systemd/issues/31272
This commit is contained in:
gvenugo3
2025-11-11 10:00:29 -07:00
parent 423a8ffccc
commit ebd222b1c8
2 changed files with 79 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/systemctl/systemctl-edit.c
+35 -22
View File
@@ -24,7 +24,7 @@ int verb_cat(int argc, char *argv[], void *userdata) {
_cleanup_hashmap_free_ Hashmap *cached_id_map = NULL, *cached_name_map = NULL;
_cleanup_(lookup_paths_done) LookupPaths lp = {};
_cleanup_strv_free_ char **names = NULL;
sd_bus *bus;
sd_bus *bus = NULL;
bool first = true;
int r, rc = 0;
@@ -39,17 +39,24 @@ int verb_cat(int argc, char *argv[], void *userdata) {
if (r < 0)
return r;
r = acquire_bus(BUS_MANAGER, &bus);
if (r < 0)
return r;
if (install_client_side() == INSTALL_CLIENT_SIDE_NO) {
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 = 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;
r = maybe_extend_with_unit_dependencies(bus, &names);
if (r < 0)
return r;
} else {
/* In client-side mode (--global, --root, etc.), just mangle names without bus interaction */
r = mangle_names("to cat", strv_skip(argv, 1), &names);
if (r < 0)
return r;
}
pager_open(arg_pager_flags);
@@ -57,7 +64,7 @@ int verb_cat(int argc, char *argv[], void *userdata) {
_cleanup_free_ char *fragment_path = NULL;
_cleanup_strv_free_ char **dropin_paths = NULL;
r = unit_find_paths(bus, *name, &lp, false, &cached_id_map, &cached_name_map, &fragment_path, &dropin_paths);
r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ !bus, &cached_id_map, &cached_name_map, &fragment_path, &dropin_paths);
if (r == -ERFKILL) {
printf("%s# Unit %s is masked%s.\n",
ansi_highlight_magenta(),
@@ -87,7 +94,7 @@ int verb_cat(int argc, char *argv[], void *userdata) {
else
puts("");
if (need_daemon_reload(bus, *name) > 0) /* ignore errors (<0), this is informational output */
if (bus && 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"
@@ -211,7 +218,6 @@ static int find_paths_to_edit(
const char *drop_in;
int r;
assert(bus);
assert(context);
assert(names);
@@ -241,8 +247,8 @@ static int find_paths_to_edit(
_cleanup_free_ char *path = NULL;
_cleanup_strv_free_ char **unit_paths = NULL;
r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ false, &cached_id_map, &cached_name_map, &path, &unit_paths);
if (r == -EKEYREJECTED) {
r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ !bus, &cached_id_map, &cached_name_map, &path, &unit_paths);
if (r == -EKEYREJECTED && bus) {
/* 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. */
@@ -327,7 +333,7 @@ int verb_edit(int argc, char *argv[], void *userdata) {
.read_from_stdin = arg_stdin,
};
_cleanup_strv_free_ char **names = NULL;
sd_bus *bus;
sd_bus *bus = NULL;
int r;
if (!on_tty() && !arg_stdin)
@@ -340,13 +346,20 @@ int verb_edit(int argc, char *argv[], void *userdata) {
if (r < 0)
return r;
r = acquire_bus(BUS_MANAGER, &bus);
if (r < 0)
return r;
if (install_client_side() == INSTALL_CLIENT_SIDE_NO) {
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 = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL);
if (r < 0)
return log_error_errno(r, "Failed to expand names: %m");
} else {
/* In client-side mode (--global, --root, etc.), just mangle names without bus interaction */
r = mangle_names("to edit", strv_skip(argv, 1), &names);
if (r < 0)
return r;
}
if (strv_isempty(names))
return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "No units matched the specified patterns.");