build-sys: move source files to subdirectory

1 files changed, 214 insertions, 0 deletions

diff --git a/src/utmp-wtmp.c b/src/utmp-wtmp.c
new file mode 100644
index 0000000000..cb3f201322
--- /dev/null
+++ b/src/utmp-wtmp.c
@@ -0,0 +1,214 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+  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 General Public License as published by
+  the Free Software Foundation; either version 2 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <utmpx.h>
+#include <errno.h>
+#include <assert.h>
+#include <string.h>
+#include <sys/utsname.h>
+
+#include "macro.h"
+#include "utmp-wtmp.h"
+
+int utmp_get_runlevel(int *runlevel, int *previous) {
+        struct utmpx lookup, *found;
+        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. */
+
+        if ((e = getenv("RUNLEVEL")) && e[0] > 0) {
+                *runlevel = e[0];
+
+                if (previous) {
+                        /* $PREVLEVEL seems to be an Upstart thing */
+
+                        if ((e = getenv("PREVLEVEL")) && e[0] > 0)
+                                *previous = e[0];
+                        else
+                                *previous = 0;
+                }
+
+                return 0;
+        }
+
+        if (utmpxname(_PATH_UTMPX) < 0)
+                return -errno;
+
+        setutxent();
+
+        zero(lookup);
+        lookup.ut_type = RUN_LVL;
+
+        if (!(found = getutxid(&lookup)))
+                r = -errno;
+        else {
+                int a, b;
+
+                a = found->ut_pid & 0xFF;
+                b = (found->ut_pid >> 8) & 0xFF;
+
+                if (a < 0 || b < 0)
+                        r = -EIO;
+                else {
+                        *runlevel = a;
+
+                        if (previous)
+                                *previous = b;
+                        r = 0;
+                }
+        }
+
+        endutxent();
+
+        return r;
+}
+
+static void init_entry(struct utmpx *store, usec_t timestamp) {
+        struct utsname uts;
+
+        assert(store);
+
+        zero(*store);
+        zero(uts);
+
+        if (timestamp <= 0)
+                timestamp = now(CLOCK_REALTIME);
+
+        store->ut_tv.tv_sec = timestamp / USEC_PER_SEC;
+        store->ut_tv.tv_usec = timestamp % USEC_PER_SEC;
+
+        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_entry_both(const struct utmpx *store) {
+        int r, s;
+
+        r = write_entry_utmp(store);
+        s = write_entry_wtmp(store);
+
+        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;
+}
+
+int utmp_put_shutdown(usec_t timestamp) {
+        struct utmpx store;
+
+        init_entry(&store, timestamp);
+
+        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 timestamp) {
+        struct utmpx store;
+
+        init_entry(&store, timestamp);
+
+        store.ut_type = BOOT_TIME;
+        strncpy(store.ut_user, "reboot", sizeof(store.ut_user));
+
+        return write_entry_both(&store);
+}
+
+int utmp_put_runlevel(usec_t timestamp, int runlevel, int previous) {
+        struct utmpx store;
+        int r;
+
+        assert(runlevel > 0);
+
+        if (previous <= 0) {
+                /* Find the old runlevel automatically */
+
+                if ((r = utmp_get_runlevel(&previous, NULL)) < 0) {
+                        if (r != -ESRCH)
+                                return r;
+
+                        previous = 0;
+                }
+
+                if (previous == runlevel)
+                        return 0;
+        }
+
+        init_entry(&store, timestamp);
+
+        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);
+}