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UTMP: Set BOOT_TIME record and add shutdown

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This patch adds support for initializing /var/run/utmp with the initial
reboot as well as a shutdown record in the UTMP db.

Also, the run level change now properly records ~ and ~~ as line and id,
respectively, and the kernel release and time of each UTMP record is now
set properly.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson committed 2016-08-08 19:06:35 +02:00
1 parent 27899feea0
commit addc21bdf6
4 files changed
+43 -5
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utmp-api.c
+30 -2
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@@ -24,17 +24,35 @@
#include <stdio.h>
#include <time.h>
#include <utmp.h>
#include <sys/utsname.h>
#include <lite/lite.h>
int utmp_set(int type, int pid, char *user)
int utmp_set(int type, int pid, char *user, char *line, char *id)
{
int result;
struct utmp ut;
struct utsname uts;
switch (type) {
case RUN_LVL:
case BOOT_TIME:
line = "~";
id = "~~";
break;
default:
break;
}
memset(&ut, 0, sizeof(ut));
ut.ut_type = type;
ut.ut_pid = pid;
strlcpy(ut.ut_user, user, sizeof(ut.ut_user));
strlcpy(ut.ut_line, line, sizeof(ut.ut_line));
strlcpy(ut.ut_id, id, sizeof(ut.ut_id));
if (!uname(&uts))
strncpy(ut.ut_host, uts.release, sizeof(ut.ut_host));
ut.ut_tv.tv_sec = time(NULL);
setutent();
result = pututline(&ut) ? 0 : 1;;
@@ -51,7 +69,17 @@ static int encode(int lvl)
int utmp_set_runlevel(int pre, int now)
{
return utmp_set(RUN_LVL, (encode(pre) << 8) | (encode(now) & 0xFF), "runlevel");
return utmp_set(RUN_LVL, (encode(pre) << 8) | (encode(now) & 0xFF), "runlevel", NULL, NULL);
}
int utmp_set_boot(void)
{
return utmp_set(BOOT_TIME, 0, "reboot", NULL, NULL);
}
int utmp_set_halt(void)
{
return utmp_set(RUN_LVL, 0, "shutdown", NULL, NULL);
}
int utmp_show(char *file)