Add uid,huid descriptors

Signed-off-by: Piotr Resztak <[email protected]>

README.md

@@ -83,6 +83,8 @@ The ps library is compatible with all AIX format descriptors of the ps command-l
   - The corresponding host PID of a container process.
 - **huser**
   - The corresponding effective user of a container process on the host.
+- **huid**
+  - The corresponding host UID of a container process.
 - **label**
   - Current security attributes of the process.
 - **seccomp**

psgo.go

@@ -181,6 +181,11 @@ var (
 			header: "USER",
 			procFn: processUSER,
 		},
+		{
+			normal: "uid",
+			header: "UID",
+			procFn: processUID,
+		},
 		{
 			code:   "%a",
 			normal: "args",
@@ -294,6 +299,12 @@ var (
 			onHost: true,
 			procFn: processHUSER,
 		},
+		{
+			normal: "huid",
+			header: "HUID",
+			onHost: true,
+			procFn: processHUID,
+		},
 		{
 			normal: "hgroup",
 			header: "HGROUP",
@@ -648,6 +659,11 @@ func processUSER(p *process.Process, ctx *psContext) (string, error) {
 	return process.LookupUID(p.Status.Uids[1])
 }
 
+// processUID returns the effective UID of the process as the decimal representation.
+func processUID(p *process.Process, ctx *psContext) (string, error) {
+	return p.Status.Uids[1], nil
+}
+
 // processRUSER returns the effective user name of the process.  This will be
 // the textual user ID, if it can be obtained, or a decimal representation
 // otherwise.
@@ -857,6 +873,23 @@ func processHUSER(p *process.Process, ctx *psContext) (string, error) {
 	return "?", nil
 }
 
+// processHUID returns the effective UID of the corresponding host process
+// of the (container) as the decimal representation or "?" if no corresponding
+// process could be found.
+func processHUID(p *process.Process, ctx *psContext) (string, error) {
+	if hp := findHostProcess(p, ctx); hp != nil {
+		if ctx.opts != nil && len(ctx.opts.UIDMap) > 0 {
+			// Return uid without searching its textual representation.
+			lookupFunc := func(uid string) (string, error) {
+				return uid, nil
+			}
+			return findID(hp.Status.Uids[1], ctx.opts.UIDMap, lookupFunc, "/proc/sys/fs/overflowuid")
+		}
+		return hp.Status.Uids[1], nil
+	}
+	return "?", nil
+}
+
 // processHGROUP returns the effective group ID of the corresponding host
 // process of the (container) or "?" if no corresponding process could be
 // found.

test/format.bats

@@ -59,6 +59,12 @@
 	[[ ${lines[0]} =~ "USER" ]]
 }
 
+@test "UID header" {
+	run ./bin/psgo -format "uid"
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ "UID" ]]
+}
+
 @test "COMMAND (args) header" {
 	run ./bin/psgo -format "%a"
 	[ "$status" -eq 0 ]
@@ -211,6 +217,14 @@
 	[[ ${lines[1]} =~ "?" ]]
 }
 
+@test "HUID header" {
+	run ./bin/psgo -format "huid"
+	[ "$status" -eq 0 ]
+	[[ ${lines[0]} =~ "HUID" ]]
+	# host UIDs are only extracted with `-pid`
+	[[ ${lines[1]} =~ "?" ]]
+}
+
 @test "HGROUP header" {
 	run ./bin/psgo -format "hgroup"
 	[ "$status" -eq 0 ]
@@ -265,14 +279,15 @@ function is_labeling_enabled() {
 }
 
 @test "ALL header" {
-	run ./bin/psgo -format "pcpu, group, groups, ppid, user, args, comm, rgroup, nice, pid, pgid, etime, ruser, time, tty, vsz, capamb, capinh, capprm, capeff, capbnd, seccomp, hpid, huser, hgroup, hgroups, rss, state"
+	run ./bin/psgo -format "pcpu, group, groups, ppid, user, uid, args, comm, rgroup, nice, pid, pgid, etime, ruser, time, tty, vsz, capamb, capinh, capprm, capeff, capbnd, seccomp, hpid, huser, huid, hgroup, hgroups, rss, state"
 	[ "$status" -eq 0 ]
 
 	[[ ${lines[0]} =~ "%CPU" ]]
 	[[ ${lines[0]} =~ "GROUP" ]]
 	[[ ${lines[0]} =~ "GROUPS" ]]
 	[[ ${lines[0]} =~ "PPID" ]]
 	[[ ${lines[0]} =~ "USER" ]]
+	[[ ${lines[0]} =~ "UID" ]]
 	[[ ${lines[0]} =~ "COMMAND" ]]
 	[[ ${lines[0]} =~ "COMMAND" ]]
 	[[ ${lines[0]} =~ "RGROUP" ]]
@@ -291,6 +306,7 @@ function is_labeling_enabled() {
 	[[ ${lines[0]} =~ "SECCOMP" ]]
 	[[ ${lines[0]} =~ "HPID" ]]
 	[[ ${lines[0]} =~ "HUSER" ]]
+	[[ ${lines[0]} =~ "HUID" ]]
 	[[ ${lines[0]} =~ "HGROUP" ]]
 	[[ ${lines[0]} =~ "HGROUPS" ]]
 	[[ ${lines[0]} =~ "RSS" ]]

test/list.bats

@@ -3,5 +3,5 @@
 @test "List descriptors" {
 	run ./bin/psgo -list
 	[ "$status" -eq 0 ]
-	[[ ${lines[0]} =~ "args, capamb, capbnd, capeff, capinh, capprm, comm, etime, group, groups, hgroup, hgroups, hpid, huser, label, nice, pcpu, pgid, pid, ppid, rgroup, rss, ruser, seccomp, state, stime, time, tty, user, vsz" ]]
+	[[ ${lines[0]} =~ "args, capamb, capbnd, capeff, capinh, capprm, comm, etime, group, groups, hgroup, hgroups, hpid, huid, huser, label, nice, pcpu, pgid, pid, ppid, rgroup, rss, ruser, seccomp, state, stime, time, tty, uid, user, vsz" ]]
 }