chiark / gitweb /
Prep v230: Add utmp support to make wall message to work properly.
authorSven Eden <yamakuzure@gmx.net>
Thu, 8 Jun 2017 06:49:12 +0000 (08:49 +0200)
committerSven Eden <yamakuzure@gmx.net>
Fri, 16 Jun 2017 08:12:58 +0000 (10:12 +0200)
24 files changed:
Makefile.am
cb/elogind.cbp
configure.ac
src/basic/hostname-util.c
src/basic/hostname-util.h
src/basic/terminal-util.c
src/basic/terminal-util.h
src/basic/user-util.c
src/basic/user-util.h
src/basic/util.c
src/libelogind/libelogind.sym
src/libelogind/sd-bus/bus-convenience.c
src/login/logind-dbus.c
src/login/logind-utmp.c [new file with mode: 0644]
src/login/logind.h
src/login/org.freedesktop.login1.conf
src/login/org.freedesktop.login1.policy.in
src/login/org.freedesktop.login1.service
src/shared/utmp-wtmp.c [new file with mode: 0644]
src/shared/utmp-wtmp.h [new file with mode: 0644]
src/systemd/sd-bus.h
src/update-utmp/Makefile [new file with mode: 0644]
src/update-utmp/update-utmp.c [new file with mode: 0644]
src/update-utmp/update-utmp.h [new file with mode: 0644]

index 67238fa..4091f42 100644 (file)
@@ -152,6 +152,7 @@ AM_CPPFLAGS = \
        -I $(top_srcdir)/src/libelogind/sd-bus \
        -I $(top_srcdir)/src/libelogind/sd-event \
        -I $(top_srcdir)/src/libelogind/sd-login \
+       -I $(top_srcdir)/src/update-utmp \
        $(OUR_CPPFLAGS)
 
 AM_CFLAGS = $(OUR_CFLAGS)
@@ -452,6 +453,12 @@ libshared_la_SOURCES = \
        src/shared/spawn-polkit-agent.c \
        src/shared/spawn-polkit-agent.h
 
+if HAVE_UTMP
+libshared_la_SOURCES += \
+       src/shared/utmp-wtmp.c \
+       src/update-utmp/update-utmp.c
+endif
+
 if HAVE_ACL
 libshared_la_SOURCES += \
        src/shared/acl-util.c \
@@ -677,6 +684,7 @@ libelogind_core_la_SOURCES = \
        src/login/logind-session-dbus.c \
        src/login/logind-seat-dbus.c \
        src/login/logind-user-dbus.c \
+       src/login/logind-utmp.c \
        src/login/logind-acl.h \
        src/core/cgroup.h \
        src/core/cgroup.c \
index 63f9171..17d61e0 100644 (file)
                        <Option compilerVar="CC" />
                </Unit>
                <Unit filename="../src/basic/dirent-util.h" />
-               <Unit filename="../src/basic/errno-from-name.h" />
                <Unit filename="../src/basic/errno-list.c">
                        <Option compilerVar="CC" />
                </Unit>
                <Unit filename="../src/basic/errno-list.h" />
-               <Unit filename="../src/basic/errno-to-name.h" />
                <Unit filename="../src/basic/escape.c">
                        <Option compilerVar="CC" />
                </Unit>
                        <Option compilerVar="CC" />
                </Unit>
                <Unit filename="../src/login/logind-user.h" />
+               <Unit filename="../src/login/logind-utmp.c">
+                       <Option compilerVar="CC" />
+               </Unit>
                <Unit filename="../src/login/logind.c">
                        <Option compilerVar="CC" />
                </Unit>
                <Unit filename="../src/shared/spawn-polkit-agent.h" />
                <Unit filename="../src/shared/test-tables.h" />
                <Unit filename="../src/shared/udev-util.h" />
+               <Unit filename="../src/shared/utmp-wtmp.c">
+                       <Option compilerVar="CC" />
+               </Unit>
+               <Unit filename="../src/shared/utmp-wtmp.h" />
                <Unit filename="../src/systemd/_sd-common.h" />
                <Unit filename="../src/systemd/sd-bus-protocol.h" />
                <Unit filename="../src/systemd/sd-bus-vtable.h" />
                <Unit filename="../src/systemd/sd-id128.h" />
                <Unit filename="../src/systemd/sd-login.h" />
                <Unit filename="../src/systemd/sd-messages.h" />
+               <Unit filename="../src/update-utmp/update-utmp.c">
+                       <Option compilerVar="CC" />
+               </Unit>
+               <Unit filename="../src/update-utmp/update-utmp.h" />
                <Extensions>
                        <envvars />
                        <code_completion />
index a327e2c..8450bbc 100644 (file)
@@ -421,6 +421,16 @@ AC_ARG_WITH([udevbindir],
 AC_SUBST([udevbindir], [$with_udevbindir])
 
 # ------------------------------------------------------------------------------
+have_utmp=yes
+AC_ARG_ENABLE([utmp], AS_HELP_STRING([--disable-utmp], [disable utmp/wtmp log handling]),
+        AS_CASE("x${enableval}",
+                [xyes], [have_utmp=yes],
+                [xno],  [have_utmp=no],
+                AC_MSG_ERROR(bad value ${enableval} for --enable-utmp)))
+AS_IF([test "x$have_utmp" = "xyes"], [AC_DEFINE(HAVE_UTMP, 1, [Define if utmp/wtmp support is enabled])])
+AM_CONDITIONAL([HAVE_UTMP], [test "x$have_utmp" = "xyes"])
+
+# ------------------------------------------------------------------------------
 have_coverage=no
 AC_ARG_ENABLE(coverage, AS_HELP_STRING([--enable-coverage], [enable test coverage]))
 if test "x$enable_coverage" = "xyes" ; then
@@ -783,6 +793,7 @@ AC_MSG_RESULT([
         man pages:               ${have_manpages}
         test coverage:           ${have_coverage}
         Split /usr:              ${enable_split_usr}
+        utmp/wtmp support:       ${have_utmp}
         Link time optimization:  ${have_lto}
         extra debugging:         ${enable_debug}
         cgroup controller:       ${with_cgroupctrl}
index d8d05df..a5cb62e 100644 (file)
@@ -45,6 +45,7 @@ bool hostname_is_set(void) {
 
         return true;
 }
+#endif // 0
 
 char* gethostname_malloc(void) {
         struct utsname u;
@@ -61,6 +62,7 @@ char* gethostname_malloc(void) {
         return strdup(u.nodename);
 }
 
+#if 0 /// UNNEEDED by elogind
 int gethostname_strict(char **ret) {
         struct utsname u;
         char *k;
index 1c9efab..4282d71 100644 (file)
 
 #if 0 /// UNNEEDED by elogind
 bool hostname_is_set(void);
+#endif // 0
 
 char* gethostname_malloc(void);
+#if 0 /// UNNEEDED by elogind
 int gethostname_strict(char **ret);
 #endif // 0
 
index cb1e6a0..cb75ad7 100644 (file)
@@ -856,7 +856,6 @@ int make_null_stdio(void) {
         return make_stdio(null_fd);
 }
 
-#if 0 /// UNNEEDED by elogind
 int getttyname_malloc(int fd, char **ret) {
         size_t l = 100;
         int r;
@@ -906,7 +905,6 @@ int getttyname_harder(int fd, char **r) {
         *r = s;
         return 0;
 }
-#endif // 0
 
 int get_ctty_devnr(pid_t pid, dev_t *d) {
         int r;
index 2296632..38f9151 100644 (file)
@@ -130,10 +130,10 @@ static inline const char *ansi_normal(void) {
 int get_ctty_devnr(pid_t pid, dev_t *d);
 int get_ctty(pid_t, dev_t *_devnr, char **r);
 
-#if 0 /// UNNEEDED by elogind
 int getttyname_malloc(int fd, char **r);
 int getttyname_harder(int fd, char **r);
 
+#if 0 /// UNNEEDED by elogind
 int ptsname_malloc(int fd, char **ret);
 int ptsname_namespace(int pty, char **ret);
 
index 8862626..f575554 100644 (file)
@@ -76,7 +76,6 @@ int parse_uid(const char *s, uid_t *ret) {
         return 0;
 }
 
-#if 0 /// UNNEEDED by elogind
 char* getlogname_malloc(void) {
         uid_t uid;
         struct stat st;
@@ -89,6 +88,7 @@ char* getlogname_malloc(void) {
         return uid_to_name(uid);
 }
 
+#if 0 /// UNNEEDED by elogind
 char *getusername_malloc(void) {
         const char *e;
 
index d010b2b..5d1d0ab 100644 (file)
@@ -35,8 +35,8 @@ static inline int parse_gid(const char *s, gid_t *ret_gid) {
         return parse_uid(s, (uid_t*) ret_gid);
 }
 
-#if 0 /// UNNEEDED by elogind
 char* getlogname_malloc(void);
+#if 0 /// UNNEEDED by elogind
 char* getusername_malloc(void);
 #endif // 0
 
index 1ef6f5f..12f7e1b 100644 (file)
@@ -413,10 +413,10 @@ int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *pa
 
                 /* Detach from stdout/stderr. and reopen
                  * /dev/tty for them. This is important to
-                 * ensure that when systemctl is started via
+                 * ensure that when loginctl is started via
                  * popen() or a similar call that expects to
                  * read EOF we actually do generate EOF and
-                 * not delay this indefinitely by because we
+                 * not delay this indefinitely because we
                  * keep an unused copy of stdin around. */
                 fd = open("/dev/tty", O_WRONLY);
                 if (fd < 0) {
index abdcafc..f8d69b3 100644 (file)
@@ -325,7 +325,7 @@ global:
         sd_bus_call_method;
         /* sd_bus_call_method_async; */
         sd_bus_get_property;
-        /* sd_bus_get_property_trivial; */
+        sd_bus_get_property_trivial;
         sd_bus_get_property_string;
         /* sd_bus_get_property_strv; */
         /* sd_bus_set_property; */
index 6fe6547..9fdfdf4 100644 (file)
@@ -327,7 +327,6 @@ fail:
         return sd_bus_error_set_errno(error, r);
 }
 
-#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_get_property_trivial(
                 sd_bus *bus,
                 const char *destination,
@@ -369,7 +368,6 @@ _public_ int sd_bus_get_property_trivial(
 fail:
         return sd_bus_error_set_errno(error, r);
 }
-#endif // 0
 
 _public_ int sd_bus_get_property_string(
                 sd_bus *bus,
index a6bce0d..3ad24b1 100644 (file)
 #include "udev-util.h"
 #include "unit-name.h"
 #include "user-util.h"
-//#include "utmp-wtmp.h"
+#include "utmp-wtmp.h"
+
+/// Includes needed by elogind:
+#include "update-utmp.h"
 
 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
@@ -1548,6 +1551,9 @@ static int execute_shutdown_or_sleep(
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
         char *c = NULL;
         const char *p;
+#else
+        /* needed for update-utmp */
+        char** argv_utmp = NULL;
 #endif // 0
         int r;
 
@@ -1588,6 +1594,29 @@ static int execute_shutdown_or_sleep(
                 m->action_what = w;
         }
 #else
+        if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
+
+                /* As we have no systemd update-utmp daemon running, we have to
+                 * set the relevant utmp/wtmp entries ourselves.
+                 */
+
+                if (strv_extend(&argv_utmp, "elogind") < 0)
+                        return log_oom();
+
+                if (HANDLE_REBOOT == action) {
+                        if (strv_extend(&argv_utmp, "reboot") < 0)
+                                return log_oom();
+                } else {
+                        if (strv_extend(&argv_utmp, "shutdown") < 0)
+                                return log_oom();
+                }
+
+                 /* This comes from our patched update-utmp/update-utmp.c */
+                update_utmp(2, argv_utmp, m->bus);
+                strv_free(argv_utmp);
+        }
+
+        /* Now perform the requested action */
         r = shutdown_or_sleep(m, action);
 
         /* no more pending actions, whether this failed or not */
@@ -2093,11 +2122,9 @@ static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_
                 }
         }
 
-#if 0 /// elogind does not support utmp-wtmp
         r = manager_setup_wall_message_timer(m);
         if (r < 0)
                 return r;
-#endif // 0
 
         if (!isempty(type)) {
                 r = update_schedule_file(m);
@@ -2119,7 +2146,6 @@ static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userd
         cancelled = m->scheduled_shutdown_type != NULL;
         reset_scheduled_shutdown(m);
 
-#if 0 /// elogind does not support utmp-wtmp
         if (cancelled) {
                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
                 const char *tty = NULL;
@@ -2135,7 +2161,6 @@ static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userd
                 utmp_wall("The system shutdown has been cancelled",
                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
         }
-#endif // 0
 
         return sd_bus_reply_method_return(message, "b", cancelled);
 }
diff --git a/src/login/logind-utmp.c b/src/login/logind-utmp.c
new file mode 100644 (file)
index 0000000..d959a4a
--- /dev/null
@@ -0,0 +1,183 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Daniel Mack
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <pwd.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "sd-messages.h"
+
+#include "alloc-util.h"
+#include "audit-util.h"
+#include "bus-common-errors.h"
+#include "bus-error.h"
+#include "bus-util.h"
+#include "formats-util.h"
+#include "logind.h"
+//#include "special.h"
+#include "strv.h"
+#include "unit-name.h"
+#include "user-util.h"
+#include "utmp-wtmp.h"
+
+_const_ static usec_t when_wall(usec_t n, usec_t elapse) {
+
+        usec_t left;
+        unsigned int i;
+        static const int wall_timers[] = {
+                0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+                25, 40, 55, 70, 100, 130, 150, 180,
+        };
+
+        /* If the time is already passed, then don't announce */
+        if (n >= elapse)
+                return 0;
+
+        left = elapse - n;
+
+        for (i = 1; i < ELEMENTSOF(wall_timers); i++)
+                if (wall_timers[i] * USEC_PER_MINUTE >= left)
+                        return left - wall_timers[i-1] * USEC_PER_MINUTE;
+
+        return left % USEC_PER_HOUR;
+}
+
+bool logind_wall_tty_filter(const char *tty, void *userdata) {
+
+        Manager *m = userdata;
+
+        assert(m);
+
+        if (!startswith(tty, "/dev/") || !m->scheduled_shutdown_tty)
+                return true;
+
+        return !streq(tty + 5, m->scheduled_shutdown_tty);
+}
+
+static int warn_wall(Manager *m, usec_t n) {
+        char date[FORMAT_TIMESTAMP_MAX] = {};
+        _cleanup_free_ char *l = NULL;
+        usec_t left;
+        int r;
+
+        assert(m);
+
+        if (!m->enable_wall_messages)
+                return 0;
+
+        left = m->scheduled_shutdown_timeout > n;
+
+        r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
+                     strempty(m->wall_message),
+                     isempty(m->wall_message) ? "" : "\n",
+                     m->scheduled_shutdown_type,
+                     left ? "at " : "NOW",
+                     left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
+        if (r < 0) {
+                log_oom();
+                return 0;
+        }
+
+        utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
+                  m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
+
+        return 1;
+}
+
+static int wall_message_timeout_handler(
+                        sd_event_source *s,
+                        uint64_t usec,
+                        void *userdata) {
+
+        Manager *m = userdata;
+        usec_t n, next;
+        int r;
+
+        assert(m);
+        assert(s == m->wall_message_timeout_source);
+
+        n = now(CLOCK_REALTIME);
+
+        r = warn_wall(m, n);
+        if (r == 0)
+                return 0;
+
+        next = when_wall(n, m->scheduled_shutdown_timeout);
+        if (next > 0) {
+                r = sd_event_source_set_time(s, n + next);
+                if (r < 0)
+                        return log_error_errno(r, "sd_event_source_set_time() failed. %m");
+
+                r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
+                if (r < 0)
+                        return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
+        }
+
+        return 0;
+}
+
+int manager_setup_wall_message_timer(Manager *m) {
+
+        usec_t n, elapse;
+        int r;
+
+        assert(m);
+
+        n = now(CLOCK_REALTIME);
+        elapse = m->scheduled_shutdown_timeout;
+
+        /* wall message handling */
+
+        if (isempty(m->scheduled_shutdown_type)) {
+                warn_wall(m, n);
+                return 0;
+        }
+
+        if (elapse < n)
+                return 0;
+
+        /* Warn immediately if less than 15 minutes are left */
+        if (elapse - n < 15 * USEC_PER_MINUTE) {
+                r = warn_wall(m, n);
+                if (r == 0)
+                        return 0;
+        }
+
+        elapse = when_wall(n, elapse);
+        if (elapse == 0)
+                return 0;
+
+        if (m->wall_message_timeout_source) {
+                r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
+                if (r < 0)
+                        return log_error_errno(r, "sd_event_source_set_time() failed. %m");
+
+                r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
+                if (r < 0)
+                        return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
+        } else {
+                r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
+                                      CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
+                if (r < 0)
+                        return log_error_errno(r, "sd_event_add_time() failed. %m");
+        }
+
+        return 0;
+}
index 53c2b38..56dd515 100644 (file)
@@ -234,9 +234,7 @@ int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const ch
 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret);
 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret);
 
-#if 0 /// UNNEEDED by elogind
 int manager_setup_wall_message_timer(Manager *m);
 bool logind_wall_tty_filter(const char *tty, void *userdata);
-#endif // 0
 
 int manager_dispatch_delayed(Manager *manager, bool timeout);
index c89e404..b11ab76 100644 (file)
@@ -3,9 +3,9 @@
         "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
 
 <!--
-  This file is part of systemd.
+  This file is part of elogind.
 
-  systemd is free software; you can redistribute it and/or modify it
+  elogind is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.
index 1fa6441..4369577 100644 (file)
@@ -3,9 +3,9 @@
         "http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd">
 
 <!--
-  This file is part of systemd.
+  This file is part of elogind.
 
-  systemd is free software; you can redistribute it and/or modify it
+  elogind is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.
@@ -13,8 +13,8 @@
 
 <policyconfig>
 
-        <vendor>The systemd Project</vendor>
-        <vendor_url>http://www.freedesktop.org/wiki/Software/systemd</vendor_url>
+        <vendor>The systemd project's "logind", extracted to a standalone package</vendor>
+        <vendor_url>https://github.com/elogind/elogind</vendor_url>
 
         <action id="org.freedesktop.login1.inhibit-block-shutdown">
                 <_description>Allow applications to inhibit system shutdown</_description>
index 762dae2..e6eaa00 100644 (file)
@@ -1,6 +1,6 @@
-#  This file is part of systemd.
+#  This file is part of elogind.
 #
-#  systemd is free software; you can redistribute it and/or modify it
+#  elogind is free software; you can redistribute it and/or modify it
 #  under the terms of the GNU Lesser General Public License as published by
 #  the Free Software Foundation; either version 2.1 of the License, or
 #  (at your option) any later version.
diff --git a/src/shared/utmp-wtmp.c b/src/shared/utmp-wtmp.c
new file mode 100644 (file)
index 0000000..9750dcd
--- /dev/null
@@ -0,0 +1,445 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+#include <utmpx.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "hostname-util.h"
+#include "macro.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "terminal-util.h"
+#include "time-util.h"
+#include "user-util.h"
+#include "util.h"
+#include "utmp-wtmp.h"
+
+int utmp_get_runlevel(int *runlevel, int *previous) {
+        struct utmpx *found, lookup = { .ut_type = RUN_LVL };
+        int r;
+        const char *e;
+
+        assert(runlevel);
+
+        /* If these values are set in the environment this takes
+         * precedence. Presumably, sysvinit does this to work around a
+         * race condition that would otherwise exist where we'd always
+         * go to disk and hence might read runlevel data that might be
+         * very new and does not apply to the current script being
+         * executed. */
+
+        e = getenv("RUNLEVEL");
+        if (e && e[0] > 0) {
+                *runlevel = e[0];
+
+                if (previous) {
+                        /* $PREVLEVEL seems to be an Upstart thing */
+
+                        e = getenv("PREVLEVEL");
+                        if (e && e[0] > 0)
+                                *previous = e[0];
+                        else
+                                *previous = 0;
+                }
+
+                return 0;
+        }
+
+        if (utmpxname(_PATH_UTMPX) < 0)
+                return -errno;
+
+        setutxent();
+
+        found = getutxid(&lookup);
+        if (!found)
+                r = -errno;
+        else {
+                int a, b;
+
+                a = found->ut_pid & 0xFF;
+                b = (found->ut_pid >> 8) & 0xFF;
+
+                *runlevel = a;
+                if (previous)
+                        *previous = b;
+
+                r = 0;
+        }
+
+        endutxent();
+
+        return r;
+}
+
+static void init_timestamp(struct utmpx *store, usec_t t) {
+        assert(store);
+
+        if (t <= 0)
+                t = now(CLOCK_REALTIME);
+
+        store->ut_tv.tv_sec = t / USEC_PER_SEC;
+        store->ut_tv.tv_usec = t % USEC_PER_SEC;
+}
+
+static void init_entry(struct utmpx *store, usec_t t) {
+        struct utsname uts = {};
+
+        assert(store);
+
+        init_timestamp(store, t);
+
+        if (uname(&uts) >= 0)
+                strncpy(store->ut_host, uts.release, sizeof(store->ut_host));
+
+        strncpy(store->ut_line, "~", sizeof(store->ut_line));  /* or ~~ ? */
+        strncpy(store->ut_id, "~~", sizeof(store->ut_id));
+}
+
+static int write_entry_utmp(const struct utmpx *store) {
+        int r;
+
+        assert(store);
+
+        /* utmp is similar to wtmp, but there is only one entry for
+         * each entry type resp. user; i.e. basically a key/value
+         * table. */
+
+        if (utmpxname(_PATH_UTMPX) < 0)
+                return -errno;
+
+        setutxent();
+
+        if (!pututxline(store))
+                r = -errno;
+        else
+                r = 0;
+
+        endutxent();
+
+        return r;
+}
+
+static int write_entry_wtmp(const struct utmpx *store) {
+        assert(store);
+
+        /* wtmp is a simple append-only file where each entry is
+        simply appended to the end; i.e. basically a log. */
+
+        errno = 0;
+        updwtmpx(_PATH_WTMPX, store);
+        return -errno;
+}
+
+static int write_utmp_wtmp(const struct utmpx *store_utmp, const struct utmpx *store_wtmp) {
+        int r, s;
+
+        r = write_entry_utmp(store_utmp);
+        s = write_entry_wtmp(store_wtmp);
+
+        if (r >= 0)
+                r = s;
+
+        /* If utmp/wtmp have been disabled, that's a good thing, hence
+         * ignore the errors */
+        if (r == -ENOENT)
+                r = 0;
+
+        return r;
+}
+
+static int write_entry_both(const struct utmpx *store) {
+        return write_utmp_wtmp(store, store);
+}
+
+int utmp_put_shutdown(void) {
+        struct utmpx store = {};
+
+        init_entry(&store, 0);
+
+        store.ut_type = RUN_LVL;
+        strncpy(store.ut_user, "shutdown", sizeof(store.ut_user));
+
+        return write_entry_both(&store);
+}
+
+int utmp_put_reboot(usec_t t) {
+        struct utmpx store = {};
+
+        init_entry(&store, t);
+
+        store.ut_type = BOOT_TIME;
+        strncpy(store.ut_user, "reboot", sizeof(store.ut_user));
+
+        return write_entry_both(&store);
+}
+
+_pure_ static const char *sanitize_id(const char *id) {
+        size_t l;
+
+        assert(id);
+        l = strlen(id);
+
+        if (l <= sizeof(((struct utmpx*) NULL)->ut_id))
+                return id;
+
+        return id + l - sizeof(((struct utmpx*) NULL)->ut_id);
+}
+
+int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line, int ut_type, const char *user) {
+        struct utmpx store = {
+                .ut_type = INIT_PROCESS,
+                .ut_pid = pid,
+                .ut_session = sid,
+        };
+        int r;
+
+        assert(id);
+
+        init_timestamp(&store, 0);
+
+        /* ut_id needs only be nul-terminated if it is shorter than sizeof(ut_id) */
+        strncpy(store.ut_id, sanitize_id(id), sizeof(store.ut_id));
+
+        if (line)
+                strncpy(store.ut_line, basename(line), sizeof(store.ut_line));
+
+        r = write_entry_both(&store);
+        if (r < 0)
+                return r;
+
+        if (ut_type == LOGIN_PROCESS || ut_type == USER_PROCESS) {
+                store.ut_type = LOGIN_PROCESS;
+                r = write_entry_both(&store);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ut_type == USER_PROCESS) {
+                store.ut_type = USER_PROCESS;
+                strncpy(store.ut_user, user, sizeof(store.ut_user)-1);
+                r = write_entry_both(&store);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
+        struct utmpx lookup = {
+                .ut_type = INIT_PROCESS /* looks for DEAD_PROCESS, LOGIN_PROCESS, USER_PROCESS, too */
+        }, store, store_wtmp, *found;
+
+        assert(id);
+
+        setutxent();
+
+        /* ut_id needs only be nul-terminated if it is shorter than sizeof(ut_id) */
+        strncpy(lookup.ut_id, sanitize_id(id), sizeof(lookup.ut_id));
+
+        found = getutxid(&lookup);
+        if (!found)
+                return 0;
+
+        if (found->ut_pid != pid)
+                return 0;
+
+        memcpy(&store, found, sizeof(store));
+        store.ut_type = DEAD_PROCESS;
+        store.ut_exit.e_termination = code;
+        store.ut_exit.e_exit = status;
+
+        zero(store.ut_user);
+        zero(store.ut_host);
+        zero(store.ut_tv);
+
+        memcpy(&store_wtmp, &store, sizeof(store_wtmp));
+        /* wtmp wants the current time */
+        init_timestamp(&store_wtmp, 0);
+
+        return write_utmp_wtmp(&store, &store_wtmp);
+}
+
+
+int utmp_put_runlevel(int runlevel, int previous) {
+        struct utmpx store = {};
+        int r;
+
+        assert(runlevel > 0);
+
+        if (previous <= 0) {
+                /* Find the old runlevel automatically */
+
+                r = utmp_get_runlevel(&previous, NULL);
+                if (r < 0) {
+                        if (r != -ESRCH)
+                                return r;
+
+                        previous = 0;
+                }
+        }
+
+        if (previous == runlevel)
+                return 0;
+
+        init_entry(&store, 0);
+
+        store.ut_type = RUN_LVL;
+        store.ut_pid = (runlevel & 0xFF) | ((previous & 0xFF) << 8);
+        strncpy(store.ut_user, "runlevel", sizeof(store.ut_user));
+
+        return write_entry_both(&store);
+}
+
+#define TIMEOUT_MSEC 50
+
+static int write_to_terminal(const char *tty, const char *message) {
+        _cleanup_close_ int fd = -1;
+        const char *p;
+        size_t left;
+        usec_t end;
+
+        assert(tty);
+        assert(message);
+
+        fd = open(tty, O_WRONLY|O_NDELAY|O_NOCTTY|O_CLOEXEC);
+        if (fd < 0 || !isatty(fd))
+                return -errno;
+
+        p = message;
+        left = strlen(message);
+
+        end = now(CLOCK_MONOTONIC) + TIMEOUT_MSEC*USEC_PER_MSEC;
+
+        while (left > 0) {
+                ssize_t n;
+                struct pollfd pollfd = {
+                        .fd = fd,
+                        .events = POLLOUT,
+                };
+                usec_t t;
+                int k;
+
+                t = now(CLOCK_MONOTONIC);
+
+                if (t >= end)
+                        return -ETIME;
+
+                k = poll(&pollfd, 1, (end - t) / USEC_PER_MSEC);
+                if (k < 0)
+                        return -errno;
+
+                if (k == 0)
+                        return -ETIME;
+
+                n = write(fd, p, left);
+                if (n < 0) {
+                        if (errno == EAGAIN)
+                                continue;
+
+                        return -errno;
+                }
+
+                assert((size_t) n <= left);
+
+                p += n;
+                left -= n;
+        }
+
+        return 0;
+}
+
+int utmp_wall(
+        const char *message,
+        const char *username,
+        const char *origin_tty,
+        bool (*match_tty)(const char *tty, void *userdata),
+        void *userdata) {
+
+        _cleanup_free_ char *text = NULL, *hn = NULL, *un = NULL, *stdin_tty = NULL;
+        char date[FORMAT_TIMESTAMP_MAX];
+        struct utmpx *u;
+        int r;
+
+        hn = gethostname_malloc();
+        if (!hn)
+                return -ENOMEM;
+        if (!username) {
+                un = getlogname_malloc();
+                if (!un)
+                        return -ENOMEM;
+        }
+
+        if (!origin_tty) {
+                getttyname_harder(STDIN_FILENO, &stdin_tty);
+                origin_tty = stdin_tty;
+        }
+
+        if (asprintf(&text,
+                     "\a\r\n"
+                     "Broadcast message from %s@%s%s%s (%s):\r\n\r\n"
+                     "%s\r\n\r\n",
+                     un ?: username, hn,
+                     origin_tty ? " on " : "", strempty(origin_tty),
+                     format_timestamp(date, sizeof(date), now(CLOCK_REALTIME)),
+                     message) < 0)
+                return -ENOMEM;
+
+        setutxent();
+
+        r = 0;
+
+        while ((u = getutxent())) {
+                _cleanup_free_ char *buf = NULL;
+                const char *path;
+                int q;
+
+                if (u->ut_type != USER_PROCESS || u->ut_user[0] == 0)
+                        continue;
+
+                /* this access is fine, because strlen("/dev/") << 32 (UT_LINESIZE) */
+                if (path_startswith(u->ut_line, "/dev/"))
+                        path = u->ut_line;
+                else {
+                        if (asprintf(&buf, "/dev/%.*s", (int) sizeof(u->ut_line), u->ut_line) < 0)
+                                return -ENOMEM;
+
+                        path = buf;
+                }
+
+                if (!match_tty || match_tty(path, userdata)) {
+                        q = write_to_terminal(path, text);
+                        if (q < 0)
+                                r = q;
+                }
+        }
+
+        return r;
+}
diff --git a/src/shared/utmp-wtmp.h b/src/shared/utmp-wtmp.h
new file mode 100644 (file)
index 0000000..438e270
--- /dev/null
@@ -0,0 +1,74 @@
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include "time-util.h"
+#include "util.h"
+
+#ifdef HAVE_UTMP
+int utmp_get_runlevel(int *runlevel, int *previous);
+
+int utmp_put_shutdown(void);
+int utmp_put_reboot(usec_t timestamp);
+int utmp_put_runlevel(int runlevel, int previous);
+
+int utmp_put_dead_process(const char *id, pid_t pid, int code, int status);
+int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line, int ut_type, const char *user);
+
+int utmp_wall(
+        const char *message,
+        const char *username,
+        const char *origin_tty,
+        bool (*match_tty)(const char *tty, void *userdata),
+        void *userdata);
+
+#else /* HAVE_UTMP */
+
+static inline int utmp_get_runlevel(int *runlevel, int *previous) {
+        return -ESRCH;
+}
+static inline int utmp_put_shutdown(void) {
+        return 0;
+}
+static inline int utmp_put_reboot(usec_t timestamp) {
+        return 0;
+}
+static inline int utmp_put_runlevel(int runlevel, int previous) {
+        return 0;
+}
+static inline int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
+        return 0;
+}
+static inline int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line, int ut_type, const char *user) {
+        return 0;
+}
+static inline int utmp_wall(
+                const char *message,
+                const char *username,
+                const char *origin_tty,
+                bool (*match_tty)(const char *tty, void *userdata),
+                void *userdata) {
+        return 0;
+}
+
+#endif /* HAVE_UTMP */
index 85eed6c..ae5cba5 100644 (file)
@@ -345,9 +345,7 @@ int sd_bus_call_method(sd_bus *bus, const char *destination, const char *path, c
 int sd_bus_call_method_async(sd_bus *bus, sd_bus_slot **slot, const char *destination, const char *path, const char *interface, const char *member, sd_bus_message_handler_t callback, void *userdata, const char *types, ...);
 #endif // 0
 int sd_bus_get_property(sd_bus *bus, const char *destination, const char *path, const char *interface, const char *member, sd_bus_error *ret_error, sd_bus_message **reply, const char *type);
-#if 0 /// UNNEEDED by elogind
 int sd_bus_get_property_trivial(sd_bus *bus, const char *destination, const char *path, const char *interface, const char *member, sd_bus_error *ret_error, char type, void *ret_ptr);
-#endif // 0
 int sd_bus_get_property_string(sd_bus *bus, const char *destination, const char *path, const char *interface, const char *member, sd_bus_error *ret_error, char **ret); /* free the result! */
 #if 0 /// UNNEEDED by elogind
 int sd_bus_get_property_strv(sd_bus *bus, const char *destination, const char *path, const char *interface, const char *member, sd_bus_error *ret_error, char ***ret); /* free the result! */
diff --git a/src/update-utmp/Makefile b/src/update-utmp/Makefile
new file mode 100644 (file)
index 0000000..9d07505
--- /dev/null
@@ -0,0 +1,28 @@
+#  This file is part of systemd.
+#
+#  Copyright 2010 Lennart Poettering
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd 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
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+# This file is a dirty trick to simplify compilation from within
+# emacs. This file is not intended to be distributed. So, don't touch
+# it, even better ignore it!
+
+all:
+       $(MAKE) -C ..
+
+clean:
+       $(MAKE) -C .. clean
+
+.PHONY: all clean
diff --git a/src/update-utmp/update-utmp.c b/src/update-utmp/update-utmp.c
new file mode 100644 (file)
index 0000000..7162084
--- /dev/null
@@ -0,0 +1,316 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef HAVE_AUDIT
+#include <libaudit.h>
+#endif
+
+#include "sd-bus.h"
+
+//#include "alloc-util.h"
+#include "bus-error.h"
+//#include "bus-util.h"
+//#include "formats-util.h"
+//#include "log.h"
+//#include "macro.h"
+//#include "special.h"
+//#include "unit-name.h"
+//#include "util.h"
+#include "utmp-wtmp.h"
+
+/// includes needed by elogind:
+#include "string-util.h"
+#include "time-util.h"
+#include "update-utmp.h"
+
+
+typedef struct Context {
+        sd_bus *bus;
+#ifdef HAVE_AUDIT
+        int audit_fd;
+#endif
+} Context;
+
+static usec_t get_startup_time(Context *c) {
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        usec_t t = 0;
+        int r;
+
+        assert(c);
+
+        r = sd_bus_get_property_trivial(
+                        c->bus,
+                        "org.freedesktop.systemd1",
+                        "/org/freedesktop/systemd1",
+                        "org.freedesktop.systemd1.Manager",
+                        "UserspaceTimestamp",
+                        &error,
+                        't', &t);
+        if (r < 0) {
+                log_error_errno(r, "Failed to get timestamp: %s", bus_error_message(&error, r));
+                return 0;
+        }
+
+        return t;
+}
+
+#if 0 /// UNNEEDED by elogind
+static int get_current_runlevel(Context *c) {
+        static const struct {
+                const int runlevel;
+                const char *special;
+        } table[] = {
+                /* The first target of this list that is active or has
+                 * a job scheduled wins. We prefer runlevels 5 and 3
+                 * here over the others, since these are the main
+                 * runlevels used on Fedora. It might make sense to
+                 * change the order on some distributions. */
+                { '5', SPECIAL_GRAPHICAL_TARGET  },
+                { '3', SPECIAL_MULTI_USER_TARGET },
+                { '1', SPECIAL_RESCUE_TARGET     },
+        };
+
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+        int r;
+        unsigned i;
+
+        assert(c);
+
+        for (i = 0; i < ELEMENTSOF(table); i++) {
+                _cleanup_free_ char *state = NULL, *path = NULL;
+
+                path = unit_dbus_path_from_name(table[i].special);
+                if (!path)
+                        return log_oom();
+
+                r = sd_bus_get_property_string(
+                                c->bus,
+                                "org.freedesktop.systemd1",
+                                path,
+                                "org.freedesktop.systemd1.Unit",
+                                "ActiveState",
+                                &error,
+                                &state);
+                if (r < 0)
+                        return log_warning_errno(r, "Failed to get state: %s", bus_error_message(&error, r));
+
+                if (streq(state, "active") || streq(state, "reloading"))
+                        return table[i].runlevel;
+        }
+
+        return 0;
+}
+#endif // 0
+
+static int on_reboot(Context *c) {
+        int r = 0, q;
+        usec_t t;
+
+        assert(c);
+
+        /* We finished start-up, so let's write the utmp
+         * record and send the audit msg */
+
+#ifdef HAVE_AUDIT
+        if (c->audit_fd >= 0)
+                if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
+                    errno != EPERM) {
+                        r = log_error_errno(errno, "Failed to send audit message: %m");
+                }
+#endif
+
+        /* If this call fails it will return 0, which
+         * utmp_put_reboot() will then fix to the current time */
+        t = get_startup_time(c);
+
+        q = utmp_put_reboot(t);
+        if (q < 0) {
+                log_error_errno(q, "Failed to write utmp record: %m");
+                r = q;
+        }
+
+        return r;
+}
+
+static int on_shutdown(Context *c) {
+        int r = 0, q;
+
+        assert(c);
+
+        /* We started shut-down, so let's write the utmp
+         * record and send the audit msg */
+
+#ifdef HAVE_AUDIT
+        if (c->audit_fd >= 0)
+                if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
+                    errno != EPERM) {
+                        r = log_error_errno(errno, "Failed to send audit message: %m");
+                }
+#endif
+
+        q = utmp_put_shutdown();
+        if (q < 0) {
+                log_error_errno(q, "Failed to write utmp record: %m");
+                r = q;
+        }
+
+        return r;
+}
+
+#if 0 /// UNNEEDED by elogind
+static int on_runlevel(Context *c) {
+        int r = 0, q, previous, runlevel;
+
+        assert(c);
+
+        /* We finished changing runlevel, so let's write the
+         * utmp record and send the audit msg */
+
+        /* First, get last runlevel */
+        q = utmp_get_runlevel(&previous, NULL);
+
+        if (q < 0) {
+                if (q != -ESRCH && q != -ENOENT)
+                        return log_error_errno(q, "Failed to get current runlevel: %m");
+
+                previous = 0;
+        }
+
+        /* Secondly, get new runlevel */
+        runlevel = get_current_runlevel(c);
+
+        if (runlevel < 0)
+                return runlevel;
+
+        if (previous == runlevel)
+                return 0;
+
+#ifdef HAVE_AUDIT
+        if (c->audit_fd >= 0) {
+                _cleanup_free_ char *s = NULL;
+
+                if (asprintf(&s, "old-level=%c new-level=%c",
+                             previous > 0 ? previous : 'N',
+                             runlevel > 0 ? runlevel : 'N') < 0)
+                        return log_oom();
+
+                if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && errno != EPERM)
+                        r = log_error_errno(errno, "Failed to send audit message: %m");
+        }
+#endif
+
+        q = utmp_put_runlevel(runlevel, previous);
+        if (q < 0 && q != -ESRCH && q != -ENOENT) {
+                log_error_errno(q, "Failed to write utmp record: %m");
+                r = q;
+        }
+
+        return r;
+}
+#endif // 0
+
+#if 0 /// elogind needs this to be a callable function
+int main(int argc, char *argv[]) {
+#else
+void update_utmp(int argc, char* argv[], sd_bus *bus) {
+#endif // 0
+        Context c = {
+#ifdef HAVE_AUDIT
+                .audit_fd = -1
+#endif
+        };
+#if 0 /// UNNEEDED by elogind
+        int r;
+
+        if (getppid() != 1) {
+                log_error("This program should be invoked by init only.");
+                return EXIT_FAILURE;
+        }
+
+        if (argc != 2) {
+                log_error("This program requires one argument.");
+                return EXIT_FAILURE;
+        }
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+#else
+        assert(2 == argc);
+        assert(argv[1]);
+        assert(bus);
+#endif // 0
+
+#ifdef HAVE_AUDIT
+        /* If the kernel lacks netlink or audit support,
+         * don't worry about it. */
+        c.audit_fd = audit_open();
+        if (c.audit_fd < 0 && errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
+                log_error_errno(errno, "Failed to connect to audit log: %m");
+#endif
+
+#if 0 /// UNNEEDED by elogind
+        r = bus_connect_system_systemd(&c.bus);
+        if (r < 0) {
+                log_error_errno(r, "Failed to get D-Bus connection: %m");
+                r = -EIO;
+                goto finish;
+        }
+
+        log_debug("systemd-update-utmp running as pid "PID_FMT, getpid());
+
+        if (streq(argv[1], "reboot"))
+                r = on_reboot(&c);
+        else if (streq(argv[1], "shutdown"))
+                r = on_shutdown(&c);
+        else if (streq(argv[1], "runlevel"))
+                r = on_runlevel(&c);
+        else {
+                log_error("Unknown command %s", argv[1]);
+                r = -EINVAL;
+        }
+
+        log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid());
+
+finish:
+#else
+        c.bus = bus;
+        if (streq(argv[1], "reboot"))
+                (void)on_reboot(&c);
+        else if (streq(argv[1], "shutdown"))
+                (void)on_shutdown(&c);
+#endif // 0
+
+#ifdef HAVE_AUDIT
+        if (c.audit_fd >= 0)
+                audit_close(c.audit_fd);
+#endif
+
+        sd_bus_flush_close_unref(c.bus);
+
+#if 0 /// UNNEEDED by elogind
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+#endif // 0
+}
diff --git a/src/update-utmp/update-utmp.h b/src/update-utmp/update-utmp.h
new file mode 100644 (file)
index 0000000..7d7d431
--- /dev/null
@@ -0,0 +1,12 @@
+#pragma once
+#ifndef ELOGIND_SRC_UPDATE_UTMP_UPDATE_UTMP_H_INCLUDED
+#define ELOGIND_SRC_UPDATE_UTMP_UPDATE_UTMP_H_INCLUDED
+
+/******************************************************************
+* Make the old main() from update-utmp.c visible as update_utmp() *
+******************************************************************/
+
+void update_utmp(int argc, char* argv[], sd_bus *bus);
+
+
+#endif // ELOGIND_SRC_UPDATE_UTMP_UPDATE_UTMP_H_INCLUDED