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authorLennart Poettering <lennart@poettering.net>2016-04-20 15:28:28 +0200
committerLennart Poettering <lennart@poettering.net>2016-04-22 16:06:20 +0200
commit291d565a04263452c03beaf537773ade4f0b1617 (patch)
tree257b4d239c7bbe9daf312a70c6aa5e2c5033ee65 /src/core/busname.c
parent2b45d88163b29f04bf784385f4a490b2cf206861 (diff)
core,systemctl: add bus API to retrieve processes of a unit
This adds a new GetProcesses() bus call to the Unit object which returns an array consisting of all PIDs, their process names, as well as their full cgroup paths. This is then used by "systemctl status" to show the per-unit process tree. This has the benefit that the client-side no longer needs to access the cgroupfs directly to show the process tree of a unit. Instead, it now uses this new API, which means it also works if -H or -M are used correctly, as the information from the specific host is used, and not the one from the local system. Fixes: #2945
Diffstat (limited to 'src/core/busname.c')
-rw-r--r--src/core/busname.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/core/busname.c b/src/core/busname.c
index bbe61af4f0..f4f433340c 100644
--- a/src/core/busname.c
+++ b/src/core/busname.c
@@ -999,6 +999,14 @@ static bool busname_supported(void) {
return supported;
}
+static int busname_control_pid(Unit *u) {
+ BusName *n = BUSNAME(u);
+
+ assert(n);
+
+ return n->control_pid;
+}
+
static const char* const busname_result_table[_BUSNAME_RESULT_MAX] = {
[BUSNAME_SUCCESS] = "success",
[BUSNAME_FAILURE_RESOURCES] = "resources",
@@ -1052,6 +1060,8 @@ const UnitVTable busname_vtable = {
.supported = busname_supported,
+ .control_pid = busname_control_pid,
+
.bus_vtable = bus_busname_vtable,
.status_message_formats = {