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/* systemd-login.c vdagentd libsystemd-login integration code
Copyright 2012 Red Hat, Inc.
Red Hat Authors:
Hans de Goede <hdegoede@redhat.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "session-info.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <systemd/sd-login.h>
struct session_info {
int verbose;
sd_login_monitor *mon;
char *session;
};
struct session_info *session_info_create(int verbose)
{
struct session_info *si;
int r;
si = calloc(1, sizeof(*si));
if (!si)
return NULL;
si->verbose = verbose;
r = sd_login_monitor_new("session", &si->mon);
if (r < 0) {
syslog(LOG_ERR, "Error creating login monitor: %s", strerror(-r));
free(si);
return NULL;
}
return si;
}
void session_info_destroy(struct session_info *si)
{
if (!si)
return;
sd_login_monitor_unref(si->mon);
free(si->session);
free(si);
}
int session_info_get_fd(struct session_info *si)
{
return sd_login_monitor_get_fd(si->mon);
}
const char *session_info_get_active_session(struct session_info *si)
{
int r;
char *old_session = si->session;
si->session = NULL;
r = sd_seat_get_active("seat0", &si->session, NULL);
/* ENOENT happens when a seat is switching from one session to another */
if (r < 0 && r != -ENOENT)
syslog(LOG_ERR, "Error getting active session: %s",
strerror(-r));
if (si->verbose && si->session &&
(!old_session || strcmp(old_session, si->session)))
syslog(LOG_INFO, "Active session: %s", si->session);
sd_login_monitor_flush(si->mon);
free(old_session);
return si->session;
}
char *session_info_session_for_pid(struct session_info *si, uint32_t pid)
{
int r;
char *session = NULL;
r = sd_pid_get_session(pid, &session);
if (r < 0)
syslog(LOG_ERR, "Error getting session for pid %u: %s",
pid, strerror(-r));
else if (si->verbose)
syslog(LOG_INFO, "Session for pid %u: %s", pid, session);
return session;
}
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