Add status report command to service command line utility

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>

cmd/Makemodule.am

@@ -19,6 +19,7 @@ SRVHEADERS = cmd/service/servicecmd.h
 service_SOURCES = cmd/service/servicecmd.c cmd/service/help.c
 service_SOURCES += cmd/service/enable.c cmd/service/disable.c
 service_SOURCES += cmd/service/dumpscript.c cmd/service/list.c
+service_SOURCES += cmd/service/status.c
 service_SOURCES += $(SRVHEADERS)
 service_CPPFLAGS = $(AM_CPPFLAGS)
 service_CFLAGS = $(AM_CFLAGS)

cmd/service/service.8

@@ -38,6 +38,10 @@ the desired service instance.
 .BR dumpscript " " \fI<service>\fP " " \fI[arguments]\fP
 Parse a service file from and produce a pseudo shell script containing the
 exact commands executed when starting the service.
+.TP
+.BR status
+Print a status report of all supervised services, i.e. if they are currently
+running, have exited or waiting to be scheduled.
 .SH AVAILABILITY
 This program is part of the Pygos init system.
 .SH COPYRIGHT

cmd/service/status.c

@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: ISC */
+#include "servicecmd.h"
+#include "initsock.h"
+#include "service.h"
+#include "config.h"
+
+#include <unistd.h>
+
+static void free_resp(init_status_response_t *resp)
+{
+	free(resp->filename);
+	free(resp->service_name);
+}
+
+static int cmd_status(int argc, char **argv)
+{
+	init_status_response_t resp;
+	int fd, ret = EXIT_FAILURE;
+	char tmppath[256];
+	const char *state;
+	bool is_tty;
+
+	if (check_arguments(argv[0], argc, 1, 1))
+		return EXIT_FAILURE;
+
+	sprintf(tmppath, "/tmp/svcstatus.%d.sock", (int)getpid());
+	fd = init_socket_open(tmppath);
+
+	if (fd < 0) {
+		unlink(tmppath);
+		return EXIT_FAILURE;
+	}
+
+	if (init_socket_send_request(fd, EIR_STATUS))
+		goto out;
+
+	is_tty = (isatty(STDOUT_FILENO) == 1);
+
+	for (;;) {
+		memset(&resp, 0, sizeof(resp));
+
+		if (init_socket_recv_status(fd, &resp)) {
+			perror("reading from initd socket");
+			free_resp(&resp);
+			goto out;
+		}
+
+		if (resp.state == ESS_NONE) {
+			free_resp(&resp);
+			break;
+		}
+
+		switch (resp.state) {
+		case ESS_RUNNING:
+			if (!is_tty) {
+				state = "Running";
+				break;
+			}
+			state = "\033[22;32mRunning\033[0m";
+			break;
+		case ESS_ENQUEUED:
+			state = " Queue ";
+			break;
+		case ESS_EXITED:
+			if (!is_tty) {
+				state = "Exited ";
+				break;
+			}
+			if (resp.exit_status == EXIT_SUCCESS) {
+				state = "\033[22;33mExited \033[0m";
+			} else {
+				state = "\033[22;31mExited \033[0m";
+			}
+			break;
+		default:
+			if (!is_tty) {
+				state = "Unknown";
+				break;
+			}
+			state = "\033[22;31mUnknown\033[0m";
+			break;
+		}
+
+		printf("[%s] %s\n", state, resp.filename);
+
+		free_resp(&resp);
+	}
+
+	ret = EXIT_SUCCESS;
+out:
+	close(fd);
+	unlink(tmppath);
+	return ret;
+}
+
+static command_t status = {
+	.cmd = "status",
+	.usage = "",
+	.s_desc = "report the status of the currently enabled services",
+	.l_desc = "Gathers a list of all currently running services and the "
+		  "state that they are in (currently running, exited, wating "
+		  "to get scheduled).",
+	.run_cmd = cmd_status,
+};
+
+REGISTER_COMMAND(status)