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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "locale-util.h"
#include "sort-util.h"
#include "special.h"
#include "systemctl-list-dependencies.h"
#include "systemctl-util.h"
#include "systemctl.h"
#include "terminal-util.h"
static int list_dependencies_print(const char *name, UnitActiveState state, int level, unsigned branches, bool last) {
_cleanup_free_ char *n = NULL;
size_t max_len = MAX(columns(),20u);
size_t len = 0;
if (arg_plain || state == _UNIT_ACTIVE_STATE_INVALID)
printf(" ");
else {
const char *on;
switch (state) {
case UNIT_ACTIVE:
case UNIT_RELOADING:
case UNIT_ACTIVATING:
on = ansi_highlight_green();
break;
case UNIT_INACTIVE:
case UNIT_DEACTIVATING:
on = ansi_normal();
break;
default:
on = ansi_highlight_red();
break;
}
printf("%s%s%s ", on, special_glyph(unit_active_state_to_glyph(state)), ansi_normal());
}
if (!arg_plain) {
for (int i = level - 1; i >= 0; i--) {
len += 2;
if (len > max_len - 3 && !arg_full) {
printf("%s...\n",max_len % 2 ? "" : " ");
return 0;
}
printf("%s", special_glyph(branches & (1 << i) ? SPECIAL_GLYPH_TREE_VERTICAL : SPECIAL_GLYPH_TREE_SPACE));
}
len += 2;
if (len > max_len - 3 && !arg_full) {
printf("%s...\n",max_len % 2 ? "" : " ");
return 0;
}
printf("%s", special_glyph(last ? SPECIAL_GLYPH_TREE_RIGHT : SPECIAL_GLYPH_TREE_BRANCH));
}
if (arg_full) {
printf("%s\n", name);
return 0;
}
n = ellipsize(name, max_len-len, 100);
if (!n)
return log_oom();
printf("%s\n", n);
return 0;
}
static int list_dependencies_compare(char * const *a, char * const *b) {
if (unit_name_to_type(*a) == UNIT_TARGET && unit_name_to_type(*b) != UNIT_TARGET)
return 1;
if (unit_name_to_type(*a) != UNIT_TARGET && unit_name_to_type(*b) == UNIT_TARGET)
return -1;
return strcasecmp(*a, *b);
}
static int list_dependencies_one(
sd_bus *bus,
const char *name,
int level,
char ***units,
unsigned branches) {
_cleanup_strv_free_ char **deps = NULL;
int r;
bool circular = false;
assert(bus);
assert(name);
assert(units);
r = strv_extend(units, name);
if (r < 0)
return log_oom();
r = unit_get_dependencies(bus, name, &deps);
if (r < 0)
return r;
typesafe_qsort(deps, strv_length(deps), list_dependencies_compare);
STRV_FOREACH(c, deps) {
_cleanup_free_ char *load_state = NULL, *sub_state = NULL;
UnitActiveState active_state;
if (strv_contains(*units, *c)) {
circular = true;
continue;
}
if (arg_types && !strv_contains(arg_types, unit_type_suffix(*c)))
continue;
r = get_state_one_unit(bus, *c, &active_state);
if (r < 0)
return r;
if (arg_states) {
r = unit_load_state(bus, *c, &load_state);
if (r < 0)
return r;
r = get_sub_state_one_unit(bus, *c, &sub_state);
if (r < 0)
return r;
if (!strv_overlap(arg_states, STRV_MAKE(unit_active_state_to_string(active_state), load_state, sub_state)))
continue;
}
r = list_dependencies_print(*c, active_state, level, branches, /* last = */ c[1] == NULL && !circular);
if (r < 0)
return r;
if (arg_all || unit_name_to_type(*c) == UNIT_TARGET) {
r = list_dependencies_one(bus, *c, level + 1, units, (branches << 1) | (c[1] == NULL ? 0 : 1));
if (r < 0)
return r;
}
}
if (circular && !arg_plain) {
r = list_dependencies_print("...", _UNIT_ACTIVE_STATE_INVALID, level, branches, /* last = */ true);
if (r < 0)
return r;
}
if (!arg_plain)
strv_remove(*units, name);
return 0;
}
int verb_list_dependencies(int argc, char *argv[], void *userdata) {
_cleanup_strv_free_ char **units = NULL, **done = NULL;
char **patterns;
sd_bus *bus;
int r;
/* We won't be able to preserve the tree structure if --type= or --state= is used */
arg_plain = arg_plain || arg_types || arg_states;
r = acquire_bus(BUS_MANAGER, &bus);
if (r < 0)
return r;
patterns = strv_skip(argv, 1);
if (strv_isempty(patterns)) {
units = strv_new(SPECIAL_DEFAULT_TARGET);
if (!units)
return log_oom();
} else {
r = expand_unit_names(bus, patterns, NULL, &units, NULL);
if (r < 0)
return log_error_errno(r, "Failed to expand names: %m");
}
pager_open(arg_pager_flags);
STRV_FOREACH(u, units) {
if (u != units)
puts("");
puts(*u);
r = list_dependencies_one(bus, *u, 0, &done, 0);
if (r < 0)
return r;
}
return 0;
}
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