diff options
author | David Tardon <dtardon@redhat.com> | 2023-02-17 17:27:50 +0100 |
---|---|---|
committer | David Tardon <dtardon@redhat.com> | 2023-02-21 19:03:24 +0100 |
commit | 5fb5f49bec997bc7626c2534629eafe81991b91e (patch) | |
tree | 2905352efd3f7a7536ba4c1691759bc677022b53 /src/systemctl/systemctl-list-units.c | |
parent | f748b2d01a03b04f01415ed7878fe4f9c605b8ff (diff) | |
download | systemd-5fb5f49bec997bc7626c2534629eafe81991b91e.tar.gz |
systemctl: add list-paths verb
Fixes #6054.
Diffstat (limited to 'src/systemctl/systemctl-list-units.c')
-rw-r--r-- | src/systemctl/systemctl-list-units.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-list-units.c b/src/systemctl/systemctl-list-units.c index ad0545cd68..86e7311d3c 100644 --- a/src/systemctl/systemctl-list-units.c +++ b/src/systemctl/systemctl-list-units.c @@ -6,6 +6,7 @@ #include "bus-locator.h" #include "format-table.h" #include "locale-util.h" +#include "path-util.h" #include "set.h" #include "sort-util.h" #include "systemctl-list-units.h" @@ -922,3 +923,215 @@ int verb_list_automounts(int argc, char *argv[], void *userdata) { return r; } + +struct path_info { + const char *machine; + const char *id; + + char *path; + char *condition; + + /* Note: triggered is a list here, although it almost certainly will always be one + * unit. Nevertheless, dbus API allows for multiple values, so let's follow that. */ + char** triggered; +}; + +struct path_infos { + size_t count; + struct path_info *items; +}; + +static int path_info_compare(const struct path_info *a, const struct path_info *b) { + int r; + + assert(a); + assert(b); + + r = strcasecmp_ptr(a->machine, b->machine); + if (r != 0) + return r; + + r = path_compare(a->path, b->path); + if (r != 0) + return r; + + r = strcmp(a->condition, b->condition); + if (r != 0) + return r; + + return strcasecmp_ptr(a->id, b->id); +} + +static void path_infos_done(struct path_infos *ps) { + assert(ps); + assert(ps->items || ps->count == 0); + + for (struct path_info *p = ps->items; p < ps->items + ps->count; p++) { + free(p->condition); + free(p->path); + strv_free(p->triggered); + } + + free(ps->items); +} + +static int get_paths(sd_bus *bus, const char *unit_path, char ***ret_conditions, char ***ret_paths) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_strv_free_ char **conditions = NULL, **paths = NULL; + const char *condition, *path; + int r, n = 0; + + assert(bus); + assert(unit_path); + assert(ret_conditions); + assert(ret_paths); + + r = sd_bus_get_property(bus, + "org.freedesktop.systemd1", + unit_path, + "org.freedesktop.systemd1.Path", + "Paths", + &error, + &reply, + "a(ss)"); + if (r < 0) + return log_error_errno(r, "Failed to get paths: %s", bus_error_message(&error, r)); + + r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ss)"); + if (r < 0) + return bus_log_parse_error(r); + + while ((r = sd_bus_message_read(reply, "(ss)", &condition, &path)) > 0) { + if (strv_extend(&conditions, condition) < 0) + return log_oom(); + + if (strv_extend(&paths, path) < 0) + return log_oom(); + + n++; + } + 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); + + *ret_conditions = TAKE_PTR(conditions); + *ret_paths = TAKE_PTR(paths); + + return n; +} + +static int output_paths_list(struct path_infos *ps) { + _cleanup_(table_unrefp) Table *table = NULL; + int r; + + assert(ps); + assert(ps->items || ps->count == 0); + + table = table_new("path", "condition", "unit", "activates"); + if (!table) + return log_oom(); + + table_set_header(table, arg_legend != 0); + if (arg_full) + table_set_width(table, 0); + + table_set_ersatz_string(table, TABLE_ERSATZ_DASH); + + for (struct path_info *p = ps->items; p < ps->items + ps->count; p++) { + _cleanup_free_ char *unit = NULL; + + unit = format_unit_id(p->id, p->machine); + if (!unit) + return log_oom(); + + r = table_add_many(table, + TABLE_STRING, p->path, + TABLE_STRING, p->condition, + TABLE_STRING, unit); + if (r < 0) + return table_log_add_error(r); + + r = table_add_triggered(table, p->triggered); + if (r < 0) + return table_log_add_error(r); + } + + r = output_table(table); + if (r < 0) + return r; + + if (arg_legend != 0) + output_legend("path", ps->count); + + return 0; +} + +int verb_list_paths(int argc, char *argv[], void *userdata) { + _cleanup_(message_set_freep) Set *replies = NULL; + _cleanup_strv_free_ char **machines = NULL, **units = NULL; + _cleanup_free_ UnitInfo *unit_infos = NULL; + _cleanup_(path_infos_done) struct path_infos path_infos = {}; + int r, n; + sd_bus *bus; + + r = acquire_bus(BUS_MANAGER, &bus); + if (r < 0) + return r; + + pager_open(arg_pager_flags); + + r = expand_unit_names(bus, strv_skip(argv, 1), ".path", &units, NULL); + if (r < 0) + return r; + + if (argc == 1 || units) { + n = get_unit_list_recursive(bus, units, &unit_infos, &replies, &machines); + if (n < 0) + return n; + + for (const UnitInfo *u = unit_infos; u < unit_infos + n; u++) { + _cleanup_strv_free_ char **conditions = NULL, **paths = NULL, **triggered = NULL; + int c; + + if (!endswith(u->id, ".path")) + continue; + + r = get_triggered_units(bus, u->unit_path, &triggered); + if (r < 0) + return r; + + c = get_paths(bus, u->unit_path, &conditions, &paths); + if (c < 0) + return c; + + if (!GREEDY_REALLOC(path_infos.items, path_infos.count + c)) + return log_oom(); + + for (int i = c - 1; i >= 0; i--) { + char **t; + + t = strv_copy(triggered); + if (!t) + return log_oom(); + + path_infos.items[path_infos.count++] = (struct path_info) { + .machine = u->machine, + .id = u->id, + .condition = TAKE_PTR(conditions[i]), + .path = TAKE_PTR(paths[i]), + .triggered = t, + }; + } + } + + typesafe_qsort(path_infos.items, path_infos.count, path_info_compare); + } + + output_paths_list(&path_infos); + + return 0; +} |