From 991f2a3932e831ccac609ba88f6e725b6c01acfe Mon Sep 17 00:00:00 2001 From: =?utf8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Thu, 11 Apr 2013 18:59:18 -0400 Subject: [PATCH] systemctl: new verb 'list-sockets' LISTEN UNIT ACTIVATES /dev/initctl systemd-initctl.socket systemd-initctl.service /dev/log systemd-journald.socket systemd-journald.service ... [::]:19531 systemd-journal-gatewayd.socket systemd-journal-gatewayd.service kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service 17 sockets listed. Pass --all to see loaded but inactive sockets, too. --- man/systemctl.xml | 33 +++++ src/systemctl/systemctl.c | 303 +++++++++++++++++++++++++++++++++++--- 2 files changed, 317 insertions(+), 19 deletions(-) diff --git a/man/systemctl.xml b/man/systemctl.xml index 97bc47ce2..1bd4af338 100644 --- a/man/systemctl.xml +++ b/man/systemctl.xml @@ -172,6 +172,14 @@ along with systemd; If not, see . + + + + + When showing sockets, show the type of the socket. + + + @@ -479,6 +487,31 @@ along with systemd; If not, see . This is the default command. + + + list-sockets + + + List socket units ordered by the listening address. Produces output + similar to + +LISTEN UNIT ACTIVATES +/dev/initctl systemd-initctl.socket systemd-initctl.service +... +[::]:22 sshd.socket sshd.service +kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service + +5 sockets listed. + + Note: because the addresses might contains spaces, this output + is not suitable for programatic consumption. + + + See also the options , + , and . + + + start NAME... diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c index 1c7edd5a5..12dce3c00 100644 --- a/src/systemctl/systemctl.c +++ b/src/systemctl/systemctl.c @@ -80,6 +80,7 @@ static bool arg_no_pager = false; static bool arg_no_wtmp = false; static bool arg_no_wall = false; static bool arg_no_reload = false; +static bool arg_show_types = false; static bool arg_ignore_inhibitors = false; static bool arg_dry = false; static bool arg_quiet = false; @@ -429,7 +430,7 @@ static void output_units_list(const struct unit_info *unit_infos, unsigned c) { static int get_unit_list(DBusConnection *bus, DBusMessage **reply, struct unit_info **unit_infos, unsigned *c) { DBusMessageIter iter, sub; - unsigned n_units = 0; + size_t size = 0; int r; assert(bus); @@ -458,47 +459,300 @@ static int get_unit_list(DBusConnection *bus, DBusMessage **reply, dbus_message_iter_recurse(&iter, &sub); while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { - struct unit_info *u; + if (!GREEDY_REALLOC(*unit_infos, size, *c + 1)) + return log_oom(); - if (*c >= n_units) { - struct unit_info *w; + bus_parse_unit_info(&sub, *unit_infos + *c); + (*c)++; - n_units = MAX(2 * *c, 16u); - w = realloc(*unit_infos, sizeof(struct unit_info) * n_units); - if (!w) - return log_oom(); + dbus_message_iter_next(&sub); + } + + return 0; +} + +static int list_units(DBusConnection *bus, char **args) { + _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; + _cleanup_free_ struct unit_info *unit_infos = NULL; + unsigned c = 0; + int r; + + pager_open_if_enabled(); + + r = get_unit_list(bus, &reply, &unit_infos, &c); + if (r < 0) + return r; + + qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info); + + output_units_list(unit_infos, c); + + return 0; +} + +static int get_triggered_units(DBusConnection *bus, const char* unit_path, + char*** triggered) +{ + const char *interface = "org.freedesktop.systemd1.Unit", + *triggers_property = "Triggers"; + DBusMessage _cleanup_dbus_message_unref_ *reply = NULL; + DBusMessageIter iter, sub; + int r; + + r = bus_method_call_with_reply(bus, + "org.freedesktop.systemd1", + unit_path, + "org.freedesktop.DBus.Properties", + "Get", + &reply, + NULL, + DBUS_TYPE_STRING, &interface, + DBUS_TYPE_STRING, &triggers_property, + DBUS_TYPE_INVALID); + if (r < 0) + return r; + + if (!dbus_message_iter_init(reply, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { + log_error("Failed to parse reply."); + return -EBADMSG; + } + + dbus_message_iter_recurse(&iter, &sub); + dbus_message_iter_recurse(&sub, &iter); + sub = iter; + + while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { + const char *unit; + + if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) { + log_error("Failed to parse reply."); + return -EBADMSG; + } + + dbus_message_iter_get_basic(&sub, &unit); + r = strv_extend(triggered, unit); + if (r < 0) + return r; + + dbus_message_iter_next(&sub); + } + + return 0; +} + +static int get_listening(DBusConnection *bus, const char* unit_path, + char*** listen, unsigned *c) +{ + const char *interface = "org.freedesktop.systemd1.Socket", + *listen_property = "Listen"; + DBusMessage _cleanup_dbus_message_unref_ *reply = NULL; + DBusMessageIter iter, sub; + int r; + + r = bus_method_call_with_reply(bus, + "org.freedesktop.systemd1", + unit_path, + "org.freedesktop.DBus.Properties", + "Get", + &reply, + NULL, + DBUS_TYPE_STRING, &interface, + DBUS_TYPE_STRING, &listen_property, + DBUS_TYPE_INVALID); + if (r < 0) + return r; + + if (!dbus_message_iter_init(reply, &iter) || + dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) { + log_error("Failed to parse reply."); + return -EBADMSG; + } + + dbus_message_iter_recurse(&iter, &sub); + dbus_message_iter_recurse(&sub, &iter); + sub = iter; + + while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { + DBusMessageIter sub2; + const char *type, *path; - *unit_infos = w; + if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) { + log_error("Failed to parse reply."); + return -EBADMSG; } - u = *unit_infos + *c; + dbus_message_iter_recurse(&sub, &sub2); + + if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 && + bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0) { + r = strv_extend(listen, type); + if (r < 0) + return r; - bus_parse_unit_info(&sub, u); + r = strv_extend(listen, path); + if (r < 0) + return r; + + (*c) ++; + } dbus_message_iter_next(&sub); - (*c)++; } - if (*c > 0) - qsort(*unit_infos, *c, sizeof(struct unit_info), compare_unit_info); + return 0; +} + +struct socket_info { + const char* id; + + char* type; + char* path; + + /* Note: triggered is a list here, although it almost certainly + * will always be one unit. Nevertheless, dbus API allows for multiple + * values, so let's follow that.*/ + char** triggered; + + /* The strv above is shared. free is set only in the first one. */ + bool own_triggered; +}; + +static int socket_info_compare(struct socket_info *a, struct socket_info *b) { + int o = strcmp(a->path, b->path); + if (o == 0) + o = strcmp(a->type, b->type); + return o; +} + +static int output_sockets_list(struct socket_info *socket_infos, unsigned cs) { + struct socket_info *s; + unsigned pathlen = sizeof("LISTEN") - 1, + typelen = (sizeof("TYPE") - 1) * arg_show_types, + socklen = sizeof("UNIT") - 1, + servlen = sizeof("ACTIVATES") - 1; + const char *on, *off; + + for (s = socket_infos; s < socket_infos + cs; s++) { + char **a; + unsigned tmp = 0; + + socklen = MAX(socklen, strlen(s->id)); + if (arg_show_types) + typelen = MAX(typelen, strlen(s->type)); + pathlen = MAX(pathlen, strlen(s->path)); + + STRV_FOREACH(a, s->triggered) + tmp += strlen(*a) + 2*(a != s->triggered); + servlen = MAX(servlen, tmp); + } + + if (cs) { + printf("%-*s %-*.*s%-*s %s\n", + pathlen, "LISTEN", + typelen + arg_show_types, typelen + arg_show_types, "TYPE ", + socklen, "UNIT", + "ACTIVATES"); + + for (s = socket_infos; s < socket_infos + cs; s++) { + char **a; + + if (arg_show_types) + printf("%-*s %-*s %-*s", + pathlen, s->path, typelen, s->type, socklen, s->id); + else + printf("%-*s %-*s", + pathlen, s->path, socklen, s->id); + STRV_FOREACH(a, s->triggered) + printf("%s %s", + a == s->triggered ? "" : ",", *a); + printf("\n"); + } + + on = ansi_highlight(true); + off = ansi_highlight(false); + printf("\n"); + } else { + on = ansi_highlight_red(true); + off = ansi_highlight_red(false); + } + + printf("%s%u sockets listed.%s\n", on, cs, off); + if (!arg_all) + printf("Pass --all to see loaded but inactive sockets, too.\n"); return 0; } -static int list_units(DBusConnection *bus, char **args) { +static int list_sockets(DBusConnection *bus, char **args) { _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; _cleanup_free_ struct unit_info *unit_infos = NULL; - unsigned c = 0; + struct socket_info *socket_infos = NULL; + const struct unit_info *u; + struct socket_info *s; + unsigned cu = 0, cs = 0; + size_t size = 0; int r; pager_open_if_enabled(); - r = get_unit_list(bus, &reply, &unit_infos, &c); + r = get_unit_list(bus, &reply, &unit_infos, &cu); if (r < 0) return r; - if (c > 0) - output_units_list(unit_infos, c); + for (u = unit_infos; u < unit_infos + cu; u++) { + const char *dot; + char _cleanup_strv_free_ **listen = NULL, **triggered = NULL; + unsigned c = 0, i; + + if (!output_show_unit(u)) + continue; + + if ((dot = strrchr(u->id, '.')) && !streq(dot+1, "socket")) + continue; + + r = get_triggered_units(bus, u->unit_path, &triggered); + if (r < 0) + goto cleanup; + + r = get_listening(bus, u->unit_path, &listen, &c); + if (r < 0) + goto cleanup; + + if (!GREEDY_REALLOC(socket_infos, size, cs + c)) { + r = log_oom(); + goto cleanup; + } + + for (i = 0; i < c; i++) + socket_infos[cs + i] = (struct socket_info) { + .id = u->id, + .type = listen[i*2], + .path = listen[i*2 + 1], + .triggered = triggered, + .own_triggered = i==0, + }; + + /* from this point on we will cleanup those socket_infos */ + cs += c; + free(listen); + listen = triggered = NULL; /* avoid cleanup */ + } + + qsort(socket_infos, cs, sizeof(struct socket_info), + (__compar_fn_t) socket_info_compare); + + output_sockets_list(socket_infos, cs); + + cleanup: + assert(cs == 0 || socket_infos); + for (s = socket_infos; s < socket_infos + cs; s++) { + free(s->type); + free(s->path); + if (s->own_triggered) + strv_free(s->triggered); + } + free(socket_infos); return 0; } @@ -3280,6 +3534,8 @@ static int show_all(const char* verb, DBusConnection *bus, bool show_properties, if (r < 0) return r; + qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info); + for (u = unit_infos; u < unit_infos + c; u++) { char _cleanup_free_ *p = NULL; @@ -4237,6 +4493,8 @@ static int systemctl_help(void) { " --full Don't ellipsize unit names on output\n" " --fail When queueing a new job, fail if conflicting jobs are\n" " pending\n" + " --irreversible Create jobs which cannot be implicitly cancelled\n" + " --show-types When showing sockets, explictly show their type\n" " --ignore-dependencies\n" " When queueing a new job, ignore all its dependencies\n" " -i --ignore-inhibitors\n" @@ -4432,6 +4690,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) { enum { ARG_FAIL = 0x100, + ARG_SHOW_TYPES, ARG_IRREVERSIBLE, ARG_IGNORE_DEPENDENCIES, ARG_VERSION, @@ -4458,6 +4717,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) { { "type", required_argument, NULL, 't' }, { "property", required_argument, NULL, 'p' }, { "all", no_argument, NULL, 'a' }, + { "show-types", no_argument, NULL, ARG_SHOW_TYPES }, { "failed", no_argument, NULL, ARG_FAILED }, { "full", no_argument, NULL, ARG_FULL }, { "fail", no_argument, NULL, ARG_FAIL }, @@ -4579,6 +4839,10 @@ static int systemctl_parse_argv(int argc, char *argv[]) { arg_all = true; break; + case ARG_SHOW_TYPES: + arg_show_types = true; + break; + case ARG_FAIL: arg_job_mode = "fail"; break; @@ -5280,6 +5544,7 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError } verbs[] = { { "list-units", LESS, 1, list_units }, { "list-unit-files", EQUAL, 1, list_unit_files }, + { "list-sockets", LESS, 1, list_sockets }, { "list-jobs", EQUAL, 1, list_jobs }, { "clear-jobs", EQUAL, 1, daemon_reload }, { "load", MORE, 2, load_unit }, -- 2.30.2