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cgls: add --user-unit to show user units

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2017-02-01 15:20:46 -05:00
parent d9855d87eb
commit e7aa3f5014
2 changed files with 37 additions and 15 deletions
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9
man/systemd-cgls.xml
View File

@ -57,7 +57,7 @@
<cmdsynopsis>
<command>systemd-cgls</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="plain"><option>--unit</option></arg>
<arg choice="plain"><option>--unit</option>|<option>--user-unit</option></arg>
<arg choice="opt" rep="repeat">UNIT</arg>
</cmdsynopsis>
</refsynopsisdiv>
@ -109,6 +109,13 @@
</listitem>
</varlistentry>
<varlistentry>
<term><option>--user-unit</option></term>
<listitem><para>Show cgroup subtrees for the specified user units.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-k</option></term>

43
src/cgls/cgls.c
View File

@ -40,7 +40,13 @@
static bool arg_no_pager = false;
static bool arg_kernel_threads = false;
static bool arg_all = false;
static bool arg_unit = false;
static enum {
SHOW_UNIT_NONE,
SHOW_UNIT_SYSTEM,
SHOW_UNIT_USER,
} arg_show_unit = SHOW_UNIT_NONE;
static int arg_full = -1;
static char* arg_machine = NULL;
@ -51,7 +57,8 @@ static void help(void) {
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" -a --all Show all groups, including empty\n"
" -u --unit Show the subtrees of specifified units\n"
" -u --unit Show the subtrees of specifified system units\n"
" --user-unit Show the subtrees of specifified user units\n"
" -l --full Do not ellipsize output\n"
" -k Include kernel threads in output\n"
" -M --machine= Show container\n"
@ -63,16 +70,18 @@ static int parse_argv(int argc, char *argv[]) {
enum {
ARG_NO_PAGER = 0x100,
ARG_VERSION,
ARG_USER_UNIT,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "all", no_argument, NULL, 'a' },
{ "full", no_argument, NULL, 'l' },
{ "machine", required_argument, NULL, 'M' },
{ "unit", no_argument, NULL, 'u' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "all", no_argument, NULL, 'a' },
{ "full", no_argument, NULL, 'l' },
{ "machine", required_argument, NULL, 'M' },
{ "unit", no_argument, NULL, 'u' },
{ "user-unit", no_argument, NULL, ARG_USER_UNIT },
{}
};
@ -101,7 +110,11 @@ static int parse_argv(int argc, char *argv[]) {
break;
case 'u':
arg_unit = true;
arg_show_unit = SHOW_UNIT_SYSTEM;
break;
case ARG_USER_UNIT:
arg_show_unit = SHOW_UNIT_USER;
break;
case 'l':
@ -123,8 +136,8 @@ static int parse_argv(int argc, char *argv[]) {
assert_not_reached("Unhandled option");
}
if (arg_machine && arg_unit) {
log_error("Cannot combine --unit with --machine.");
if (arg_machine && arg_show_unit != SHOW_UNIT_NONE) {
log_error("Cannot combine --unit or --user-unit with --machine.");
return -EINVAL;
}
@ -169,13 +182,15 @@ int main(int argc, char *argv[]) {
for (i = optind; i < argc; i++) {
int q;
if (arg_unit) {
if (arg_show_unit != SHOW_UNIT_NONE) {
/* Command line arguments are unit names */
_cleanup_free_ char *cgroup = NULL;
if (!bus) {
/* Connect to the bus only if necessary */
r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL,
arg_show_unit == SHOW_UNIT_USER,
&bus);
if (r < 0) {
log_error_errno(r, "Failed to create bus connection: %m");
goto finish;