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/*
* uterm - Linux User-Space Terminal
*
* Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Systemd integration
* Systemd provides multi-seat support and other helpers that we can use in
* uterm.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <systemd/sd-daemon.h>
#include <systemd/sd-login.h>
#include "shl_log.h"
#include "uterm_monitor.h"
#include "uterm_systemd_internal.h"
#define LOG_SUBSYSTEM "systemd"
struct uterm_sd {
sd_login_monitor *mon;
};
int uterm_sd_new(struct uterm_sd **out)
{
int ret;
struct uterm_sd *sd;
if (!out)
return -EINVAL;
ret = sd_booted();
if (ret < 0) {
log_warning("cannot determine whether system booted with systemd (%d): %s",
ret, strerror(-ret));
return -EOPNOTSUPP;
} else if (!ret) {
log_info("system not booted with systemd, disabling multi-seat support");
return -EOPNOTSUPP;
}
log_info("system booted with systemd, enabling multi-seat support");
sd = malloc(sizeof(*sd));
if (!sd)
return -ENOMEM;
memset(sd, 0, sizeof(*sd));
ret = sd_login_monitor_new("seat", &sd->mon);
if (ret) {
log_err("cannot create systemd login monitor (%d): %s",
ret, strerror(-ret));
ret = -EFAULT;
goto err_free;
}
*out = sd;
return 0;
err_free:
free(sd);
return ret;
}
void uterm_sd_free(struct uterm_sd *sd)
{
if (!sd)
return;
sd_login_monitor_unref(sd->mon);
free(sd);
}
int uterm_sd_get_fd(struct uterm_sd *sd)
{
if (!sd)
return -EINVAL;
return sd_login_monitor_get_fd(sd->mon);
}
void uterm_sd_flush(struct uterm_sd *sd)
{
if (!sd)
return;
sd_login_monitor_flush(sd->mon);
}
int uterm_sd_get_seats(struct uterm_sd *sd, char ***seats)
{
int ret;
char **s;
if (!sd || !seats)
return -EINVAL;
ret = sd_get_seats(&s);
if (ret < 0) {
log_warning("cannot read seat information from systemd: %d",
ret);
return -EFAULT;
}
*seats = s;
return ret;
}
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