Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 713 insertions, 0 deletions

diff --git a/logsrvd/logsrvd_local.c b/logsrvd/logsrvd_local.c
new file mode 100644
index 0000000..99b0a3f
--- /dev/null
+++ b/logsrvd/logsrvd_local.c
@@ -0,0 +1,713 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2019-2022 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif /* HAVE_STDBOOL_H */
+#if defined(HAVE_STDINT_H)
+# include <stdint.h>
+#elif defined(HAVE_INTTYPES_H)
+# include <inttypes.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "sudo_compat.h"
+#include "sudo_conf.h"
+#include "sudo_debug.h"
+#include "sudo_event.h"
+#include "sudo_eventlog.h"
+#include "sudo_fatal.h"
+#include "sudo_gettext.h"
+#include "sudo_json.h"
+#include "sudo_iolog.h"
+#include "sudo_rand.h"
+#include "sudo_util.h"
+
+#include "logsrvd.h"
+
+struct logsrvd_info_closure {
+    InfoMessage **info_msgs;
+    size_t infolen;
+};
+
+static double random_drop;
+
+bool
+set_random_drop(const char *dropstr)
+{
+    char *ep;
+    debug_decl(set_random_drop, SUDO_DEBUG_UTIL);
+
+    errno = 0;
+    random_drop = strtod(dropstr, &ep);
+    if (*ep != '\0' || errno != 0)
+	debug_return_bool(false);
+    random_drop /= 100.0;	/* convert from percentage */
+
+    debug_return_bool(true);
+}
+
+static bool
+logsrvd_json_log_cb(struct json_container *jsonc, void *v)
+{
+    struct logsrvd_info_closure *closure = v;
+    struct json_value json_value;
+    size_t idx;
+    debug_decl(logsrvd_json_log_cb, SUDO_DEBUG_UTIL);
+
+    for (idx = 0; idx < closure->infolen; idx++) {
+	InfoMessage *info = closure->info_msgs[idx];
+
+	switch (info->value_case) {
+	case INFO_MESSAGE__VALUE_NUMVAL:
+	    json_value.type = JSON_NUMBER;
+	    json_value.u.number = info->u.numval;
+	    if (!sudo_json_add_value(jsonc, info->key, &json_value))
+		goto bad;
+	    break;
+	case INFO_MESSAGE__VALUE_STRVAL:
+	    if (info->u.strval == NULL) {
+		sudo_warnx(U_("%s: protocol error: NULL value found in %s"),
+		    "local", info->key);
+		break;
+	    }
+	    json_value.type = JSON_STRING;
+	    json_value.u.string = info->u.strval;
+	    if (!sudo_json_add_value(jsonc, info->key, &json_value))
+		goto bad;
+	    break;
+	case INFO_MESSAGE__VALUE_STRLISTVAL: {
+	    InfoMessage__StringList *strlist = info->u.strlistval;
+	    size_t n;
+
+	    if (strlist == NULL) {
+		sudo_warnx(U_("%s: protocol error: NULL value found in %s"),
+		    "local", info->key);
+		break;
+	    }
+	    if (!sudo_json_open_array(jsonc, info->key))
+		goto bad;
+	    for (n = 0; n < strlist->n_strings; n++) {
+		if (strlist->strings[n] == NULL) {
+		    sudo_warnx(U_("%s: protocol error: NULL value found in %s"),
+			"local", info->key);
+		    break;
+		}
+		json_value.type = JSON_STRING;
+		json_value.u.string = strlist->strings[n];
+		if (!sudo_json_add_value(jsonc, NULL, &json_value))
+		    goto bad;
+	    }
+	    if (!sudo_json_close_array(jsonc))
+		goto bad;
+	    break;
+	}
+	case INFO_MESSAGE__VALUE_NUMLISTVAL: {
+	    InfoMessage__NumberList *numlist = info->u.numlistval;
+	    size_t n;
+
+	    if (numlist == NULL) {
+		sudo_warnx(U_("%s: protocol error: NULL value found in %s"),
+		    "local", info->key);
+		break;
+	    }
+	    if (!sudo_json_open_array(jsonc, info->key))
+		goto bad;
+	    for (n = 0; n < numlist->n_numbers; n++) {
+		json_value.type = JSON_NUMBER;
+		json_value.u.number = numlist->numbers[n];
+		if (!sudo_json_add_value(jsonc, NULL, &json_value))
+		    goto bad;
+	    }
+	    if (!sudo_json_close_array(jsonc))
+		goto bad;
+	    break;
+	}
+	default:
+	    sudo_warnx(U_("unexpected value_case %d in %s from %s"),
+		info->value_case, "InfoMessage", "local");
+	    break;
+	}
+    }
+    debug_return_bool(true);
+bad:
+    debug_return_bool(false);
+}
+
+/*
+ * Parse and store an AcceptMessage locally.
+ */
+bool
+store_accept_local(AcceptMessage *msg, uint8_t *buf, size_t len,
+    struct connection_closure *closure)
+{
+    struct logsrvd_info_closure info = { msg->info_msgs, msg->n_info_msgs };
+    bool new_session = closure->evlog == NULL;
+    struct eventlog *evlog = NULL;
+    char *log_id = NULL;
+    bool ret = false;
+    debug_decl(store_accept_local, SUDO_DEBUG_UTIL);
+
+    /* Store sudo-style event and I/O logs. */
+    evlog = evlog_new(msg->submit_time, msg->info_msgs, msg->n_info_msgs,
+	closure);
+    if (evlog == NULL) {
+	closure->errstr = _("error parsing AcceptMessage");
+	goto done;
+    }
+
+    /* Additional setup for the initial command in the session. */
+    if (new_session) {
+	closure->evlog = evlog;
+
+	/* Create I/O log info file and parent directories. */
+	if (msg->expect_iobufs) {
+	    if (!iolog_init(msg, closure)) {
+		closure->errstr = _("error creating I/O log");
+		goto done;
+	    }
+	    closure->log_io = true;
+	    log_id = closure->evlog->iolog_path;
+	}
+    } else if (closure->log_io) {
+	/* Sub-command from an existing session, set iolog and offset. */
+	evlog->iolog_path = strdup(closure->evlog->iolog_path);
+	if (evlog->iolog_path == NULL) {
+	    sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	    closure->errstr = _("unable to allocate memory");
+	    goto done;
+	}
+	if (closure->evlog->iolog_file != NULL) {
+	    evlog->iolog_file = evlog->iolog_path +
+		(closure->evlog->iolog_file - closure->evlog->iolog_path);
+	}
+	sudo_timespecsub(&evlog->submit_time, &closure->evlog->submit_time,
+	    &evlog->iolog_offset);
+    }
+
+    if (!eventlog_accept(evlog, 0, logsrvd_json_log_cb, &info)) {
+	closure->errstr = _("error logging accept event");
+	goto done;
+    }
+
+    if (new_session && log_id != NULL) {
+	/* Send log ID to client for restarting connections. */
+	if (!fmt_log_id_message(log_id, closure))
+	    goto done;
+	if (sudo_ev_add(closure->evbase, closure->write_ev,
+		logsrvd_conf_server_timeout(), false) == -1) {
+	    sudo_warnx("%s", U_("unable to add event to queue"));
+	    goto done;
+	}
+    }
+
+    ret = true;
+
+done:
+    if (closure->evlog != evlog)
+	eventlog_free(evlog);
+
+    debug_return_bool(ret);
+}
+
+/*
+ * Parse and store a RejectMessage locally.
+ */
+bool
+store_reject_local(RejectMessage *msg, uint8_t *buf, size_t len,
+    struct connection_closure *closure)
+{
+    struct logsrvd_info_closure info = { msg->info_msgs, msg->n_info_msgs };
+    struct eventlog *evlog = NULL;
+    bool ret = false;
+    debug_decl(store_reject_local, SUDO_DEBUG_UTIL);
+
+    evlog = evlog_new(msg->submit_time, msg->info_msgs, msg->n_info_msgs,
+	closure);
+    if (evlog == NULL) {
+	closure->errstr = _("error parsing RejectMessage");
+	goto done;
+    }
+
+    if (closure->evlog == NULL) {
+	/* Initial command in session. */
+	closure->evlog = evlog;
+    } else if (closure->log_io) {
+	/* Sub-command from an existing session, set iolog and offset. */
+	evlog->iolog_path = strdup(closure->evlog->iolog_path);
+	if (evlog->iolog_path == NULL) {
+	    sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	    closure->errstr = _("unable to allocate memory");
+	    goto done;
+	}
+	if (closure->evlog->iolog_file != NULL) {
+	    evlog->iolog_file = evlog->iolog_path +
+		(closure->evlog->iolog_file - closure->evlog->iolog_path);
+	}
+	sudo_timespecsub(&evlog->submit_time, &closure->evlog->submit_time,
+	    &evlog->iolog_offset);
+    }
+
+    if (!eventlog_reject(evlog, 0, msg->reason, logsrvd_json_log_cb, &info)) {
+	closure->errstr = _("error logging reject event");
+	goto done;
+    }
+
+    ret = true;
+
+done:
+    if (closure->evlog != evlog)
+	eventlog_free(evlog);
+
+    debug_return_bool(ret);
+}
+
+static bool
+store_exit_info_json(int dfd, struct eventlog *evlog)
+{
+    struct json_container jsonc = { 0 };
+    struct json_value json_value;
+    struct iovec iov[3];
+    bool ret = false;
+    int fd = -1;
+    off_t pos;
+    debug_decl(store_exit_info_json, SUDO_DEBUG_UTIL);
+
+    if (!sudo_json_init(&jsonc, 4, false, false, false))
+        goto done;
+
+    fd = iolog_openat(dfd, "log.json", O_RDWR);
+    if (fd == -1) {
+	sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
+	    "unable to open to %s/log.json", evlog->iolog_path);
+	if (errno == ENOENT) {
+	    /* Ignore missing log.json file. */
+	    ret = true;
+	}
+	goto done;
+    }
+
+    if (sudo_timespecisset(&evlog->run_time)) {
+	if (!sudo_json_open_object(&jsonc, "run_time"))
+	    goto done;
+
+	json_value.type = JSON_NUMBER;
+	json_value.u.number = evlog->run_time.tv_sec;
+	if (!sudo_json_add_value(&jsonc, "seconds", &json_value))
+	    goto done;
+
+	json_value.type = JSON_NUMBER;
+	json_value.u.number = evlog->run_time.tv_nsec;
+	if (!sudo_json_add_value(&jsonc, "nanoseconds", &json_value))
+	    goto done;
+
+	if (!sudo_json_close_object(&jsonc))
+	    goto done;
+    }
+
+    if (evlog->signal_name != NULL) {
+	json_value.type = JSON_STRING;
+	json_value.u.string = evlog->signal_name;
+	if (!sudo_json_add_value(&jsonc, "signal", &json_value))
+	    goto done;
+
+	json_value.type = JSON_BOOL;
+	json_value.u.boolean = evlog->dumped_core;
+	if (!sudo_json_add_value(&jsonc, "dumped_core", &json_value))
+	    goto done;
+    }
+
+    json_value.type = JSON_NUMBER;
+    json_value.u.number = evlog->exit_value;
+    if (!sudo_json_add_value(&jsonc, "exit_value", &json_value))
+	goto done;
+
+    /* Back up to overwrite the final "\n}\n" */
+    pos = lseek(fd, -3, SEEK_END);
+    if (pos == -1) {
+	sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
+	    "unable to rewind %s/log.json 3 bytes", evlog->iolog_path);
+	goto done;
+    }
+
+    /* Append the exit data and close the object. */
+    iov[0].iov_base = (char *)",";
+    iov[0].iov_len = 1;
+    iov[1].iov_base = sudo_json_get_buf(&jsonc);
+    iov[1].iov_len = sudo_json_get_len(&jsonc);
+    iov[2].iov_base = (char *)"\n}\n";
+    iov[2].iov_len = 3;
+    if (writev(fd, iov, 3) == -1) {
+	sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
+	    "unable to write %s/log.json", evlog->iolog_path);
+	/* Back up and try to restore to original state. */
+	if (lseek(fd, pos, SEEK_SET) != -1) {
+	    ignore_result(write(fd, "\n}\n", 3));
+	}
+	goto done;
+    }
+
+    ret = true;
+
+done:
+    if (fd != -1)
+	close(fd);
+    sudo_json_free(&jsonc);
+    debug_return_bool(ret);
+}
+
+bool
+store_exit_local(ExitMessage *msg, uint8_t *buf, size_t len,
+    struct connection_closure *closure)
+{
+    struct eventlog *evlog = closure->evlog;
+    int flags = 0;
+    debug_decl(store_exit_local, SUDO_DEBUG_UTIL);
+
+    if (msg->run_time != NULL) {
+	evlog->run_time.tv_sec = msg->run_time->tv_sec;
+	evlog->run_time.tv_nsec = msg->run_time->tv_nsec;
+    }
+    evlog->exit_value = msg->exit_value;
+    if (msg->signal != NULL && msg->signal[0] != '\0') {
+	sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
+	    "command was killed by SIG%s%s", msg->signal,
+	    msg->dumped_core ? " (core dumped)" : "");
+	evlog->signal_name = strdup(msg->signal);
+	if (evlog->signal_name == NULL) {
+	    closure->errstr = _("unable to allocate memory");
+	    debug_return_bool(false);
+	}
+	evlog->dumped_core = msg->dumped_core;
+    } else {
+	sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
+	    "command exited with %d", msg->exit_value);
+    }
+    if (logsrvd_conf_log_exit()) {
+	if (!eventlog_exit(closure->evlog, flags)) {
+	    closure->errstr = _("error logging exit event");
+	    debug_return_bool(false);
+	}
+    }
+
+    if (closure->log_io) {
+	/* Store the run time and exit status in log.json. */
+	if (!store_exit_info_json(closure->iolog_dir_fd, evlog)) {
+	    closure->errstr = _("error logging exit event");
+	    debug_return_bool(false);
+	}
+
+	/* Clear write bits from I/O timing file to indicate completion. */
+	mode_t mode = logsrvd_conf_iolog_mode();
+	CLR(mode, S_IWUSR|S_IWGRP|S_IWOTH);
+	if (fchmodat(closure->iolog_dir_fd, "timing", mode, 0) == -1) {
+	    sudo_warn("chmod 0%o %s/%s", (unsigned int)mode, "timing",
+		logsrvd_conf_iolog_dir());
+	}
+    }
+
+    debug_return_bool(true);
+}
+
+bool
+store_restart_local(RestartMessage *msg, uint8_t *buf, size_t len,
+    struct connection_closure *closure)
+{
+    struct timespec target;
+    struct stat sb;
+    int iofd;
+    debug_decl(store_restart_local, SUDO_DEBUG_UTIL);
+
+    target.tv_sec = msg->resume_point->tv_sec;
+    target.tv_nsec = msg->resume_point->tv_nsec;
+
+    /* We must allocate closure->evlog for iolog_path. */
+    closure->evlog = calloc(1, sizeof(*closure->evlog));
+    if (closure->evlog == NULL) {
+	sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	closure->errstr = _("unable to allocate memory");
+        goto bad;
+    }
+    closure->evlog->iolog_path = strdup(msg->log_id);
+    if (closure->evlog->iolog_path == NULL) {
+	sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	closure->errstr = _("unable to allocate memory");
+	goto bad;
+    }
+
+    /* We use iolog_dir_fd in calls to openat(2) */
+    closure->iolog_dir_fd =
+	iolog_openat(AT_FDCWD, closure->evlog->iolog_path, O_RDONLY);
+    if (closure->iolog_dir_fd == -1) {
+	sudo_warn("%s", closure->evlog->iolog_path);
+	goto bad;
+    }
+
+    /* If the timing file write bit is clear, log is already complete. */
+    if (fstatat(closure->iolog_dir_fd, "timing", &sb, 0) == -1) {
+	sudo_warn("%s/timing", closure->evlog->iolog_path);
+	goto bad;
+    }
+    if (!ISSET(sb.st_mode, S_IWUSR)) {
+	sudo_warn(U_("%s: %s"), closure->evlog->iolog_path,
+	    U_("log is already complete, cannot be restarted"));
+	closure->errstr = _("log is already complete, cannot be restarted");
+	goto bad;
+    }
+
+    /* Open existing I/O log files. */
+    if (!iolog_open_all(closure->iolog_dir_fd, closure->evlog->iolog_path,
+	    closure->iolog_files, "r+"))
+	goto bad;
+
+    /* Compressed logs don't support random access, so rewrite them. */
+    for (iofd = 0; iofd < IOFD_MAX; iofd++) {
+	if (closure->iolog_files[iofd].compressed)
+	    debug_return_bool(iolog_rewrite(&target, closure));
+    }
+
+    /* Parse timing file until we reach the target point. */
+    if (!iolog_seekto(closure->iolog_dir_fd, closure->evlog->iolog_path,
+	    closure->iolog_files, &closure->elapsed_time, &target))
+	goto bad;
+
+    /* Must seek or flush before switching from read -> write. */
+    if (iolog_seek(&closure->iolog_files[IOFD_TIMING], 0, SEEK_CUR) == -1) {
+	sudo_warn("%s/timing", closure->evlog->iolog_path);
+	goto bad;
+    }
+
+    /* Ready to log I/O buffers. */
+    debug_return_bool(true);
+bad:
+    if (closure->errstr == NULL)
+	closure->errstr = _("unable to restart log");
+    debug_return_bool(false);
+}
+
+bool
+store_alert_local(AlertMessage *msg, uint8_t *buf, size_t len,
+    struct connection_closure *closure)
+{
+    struct eventlog *evlog = NULL;
+    struct timespec alert_time;
+    bool ret = false;
+    debug_decl(store_alert_local, SUDO_DEBUG_UTIL);
+
+    if (msg->info_msgs != NULL && msg->n_info_msgs != 0) {
+	evlog = evlog_new(NULL, msg->info_msgs, msg->n_info_msgs, closure);
+	if (evlog == NULL) {
+	    closure->errstr = _("error parsing AlertMessage");
+	    goto done;
+	}
+	if (closure->evlog == NULL)
+	    closure->evlog = evlog;
+    }
+    alert_time.tv_sec = msg->alert_time->tv_sec;
+    alert_time.tv_nsec = msg->alert_time->tv_nsec;
+
+    if (!eventlog_alert(evlog, 0, &alert_time, msg->reason, NULL)) {
+	closure->errstr = _("error logging alert event");
+	goto done;
+    }
+
+    ret = true;
+
+done:
+    if (closure->evlog != evlog)
+	eventlog_free(evlog);
+
+    debug_return_bool(ret);
+}
+
+bool
+store_iobuf_local(int iofd, IoBuffer *iobuf, uint8_t *buf, size_t buflen,
+    struct connection_closure *closure)
+{
+    const struct eventlog *evlog = closure->evlog;
+    struct ProtobufCBinaryData data = iobuf->data;
+    char tbuf[1024], *newbuf = NULL;
+    const char *errstr;
+    int len;
+    debug_decl(store_iobuf_local, SUDO_DEBUG_UTIL);
+
+    /* Open log file as needed. */
+    if (!closure->iolog_files[iofd].enabled) {
+	if (!iolog_create(iofd, closure))
+	    goto bad;
+    }
+
+    /* Format timing data. */
+    /* FIXME - assumes IOFD_* matches IO_EVENT_* */
+    len = snprintf(tbuf, sizeof(tbuf), "%d %lld.%09d %zu\n",
+	iofd, (long long)iobuf->delay->tv_sec, (int)iobuf->delay->tv_nsec,
+	data.len);
+    if (len < 0 || len >= ssizeof(tbuf)) {
+	sudo_warnx(U_("unable to format timing buffer, length %d"), len);
+	goto bad;
+    }
+
+    if (!logsrvd_conf_iolog_log_passwords()) {
+	if (!iolog_pwfilt_run(logsrvd_conf_iolog_passprompt_regex(), iofd,
+		(char *)data.data, data.len, &newbuf))
+	    goto bad;
+	if (newbuf != NULL)
+	    data.data = (uint8_t *)newbuf;
+    }
+
+    /* Write to specified I/O log file. */
+    if (!iolog_write(&closure->iolog_files[iofd], data.data, data.len, &errstr)) {
+	sudo_warnx(U_("%s/%s: %s"), evlog->iolog_path, iolog_fd_to_name(iofd),
+	    errstr);
+	goto bad;
+    }
+
+    /* Write timing data. */
+    if (!iolog_write(&closure->iolog_files[IOFD_TIMING], tbuf,
+	    len, &errstr)) {
+	sudo_warnx(U_("%s/%s: %s"), evlog->iolog_path,
+	    iolog_fd_to_name(IOFD_TIMING), errstr);
+	goto bad;
+    }
+
+    update_elapsed_time(iobuf->delay, &closure->elapsed_time);
+
+    /* Random drop is a debugging tool to test client restart. */
+    if (random_drop > 0.0) {
+	double randval = arc4random() / (double)UINT32_MAX;
+	if (randval < random_drop) {
+	    closure->errstr = _("randomly dropping connection");
+	    sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_LINENO,
+		"randomly dropping connection (%f < %f)", randval, random_drop);
+	    goto bad;
+	}
+    }
+
+    free(newbuf);
+    debug_return_bool(true);
+bad:
+    free(newbuf);
+    if (closure->errstr == NULL)
+	closure->errstr = _("error writing IoBuffer");
+    debug_return_bool(false);
+}
+
+bool
+store_winsize_local(ChangeWindowSize *msg, uint8_t *buf, size_t buflen,
+    struct connection_closure *closure)
+{
+    const char *errstr;
+    char tbuf[1024];
+    int len;
+    debug_decl(store_winsize_local, SUDO_DEBUG_UTIL);
+
+    /* Format timing data including new window size. */
+    len = snprintf(tbuf, sizeof(tbuf), "%d %lld.%09d %d %d\n", IO_EVENT_WINSIZE,
+	(long long)msg->delay->tv_sec, (int)msg->delay->tv_nsec,
+	msg->rows, msg->cols);
+    if (len < 0 || len >= ssizeof(tbuf)) {
+	sudo_warnx(U_("unable to format timing buffer, length %d"), len);
+	goto bad;
+    }
+
+    /* Write timing data. */
+    if (!iolog_write(&closure->iolog_files[IOFD_TIMING], tbuf,
+	    len, &errstr)) {
+	sudo_warnx(U_("%s/%s: %s"), closure->evlog->iolog_path,
+	    iolog_fd_to_name(IOFD_TIMING), errstr);
+	goto bad;
+    }
+
+    update_elapsed_time(msg->delay, &closure->elapsed_time);
+
+    debug_return_bool(true);
+bad:
+    if (closure->errstr == NULL)
+	closure->errstr = _("error writing ChangeWindowSize");
+    debug_return_bool(false);
+}
+
+bool
+store_suspend_local(CommandSuspend *msg, uint8_t *buf, size_t buflen,
+    struct connection_closure *closure)
+{
+    const char *errstr;
+    char tbuf[1024];
+    int len;
+    debug_decl(store_suspend_local, SUDO_DEBUG_UTIL);
+
+    /* Format timing data including suspend signal. */
+    len = snprintf(tbuf, sizeof(tbuf), "%d %lld.%09d %s\n", IO_EVENT_SUSPEND,
+	(long long)msg->delay->tv_sec, (int)msg->delay->tv_nsec,
+	msg->signal);
+    if (len < 0 || len >= ssizeof(tbuf)) {
+	sudo_warnx(U_("unable to format timing buffer, length %d"), len);
+	goto bad;
+    }
+
+    /* Write timing data. */
+    if (!iolog_write(&closure->iolog_files[IOFD_TIMING], tbuf,
+	    len, &errstr)) {
+	sudo_warnx(U_("%s/%s: %s"), closure->evlog->iolog_path,
+	    iolog_fd_to_name(IOFD_TIMING), errstr);
+	goto bad;
+    }
+
+    update_elapsed_time(msg->delay, &closure->elapsed_time);
+
+    debug_return_bool(true);
+bad:
+    if (closure->errstr == NULL)
+	closure->errstr = _("error writing CommandSuspend");
+    debug_return_bool(false);
+}
+
+struct client_message_switch cms_local = {
+    store_accept_local,
+    store_reject_local,
+    store_exit_local,
+    store_restart_local,
+    store_alert_local,
+    store_iobuf_local,
+    store_suspend_local,
+    store_winsize_local
+};