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utmp: make sure we don't write the utmp reboot record twice on each boot

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(Also, only send the audit msg once, too)
This commit is contained in:
Lennart Poettering
2014-01-30 14:18:46 +01:00
parent 1cea22a5e3
commit e7fb33ffef
2 changed files with 33 additions and 57 deletions
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src/shared/utmp-wtmp.c
+26 -33
View File
@@ -46,13 +46,15 @@ int utmp_get_runlevel(int *runlevel, int *previous) {
* very new and does not apply to the current script being
* executed. */
if ((e = getenv("RUNLEVEL")) && e[0] > 0) {
e = getenv("RUNLEVEL");
if (e && e[0] > 0) {
*runlevel = e[0];
if (previous) {
/* $PREVLEVEL seems to be an Upstart thing */
if ((e = getenv("PREVLEVEL")) && e[0] > 0)
e = getenv("PREVLEVEL");
if (e && e[0] > 0)
*previous = e[0];
else
*previous = 0;
@@ -66,7 +68,8 @@ int utmp_get_runlevel(int *runlevel, int *previous) {
setutxent();
if (!(found = getutxid(&lookup)))
found = getutxid(&lookup);
if (!found)
r = -errno;
else {
int a, b;
@@ -232,7 +235,8 @@ int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
lookup.ut_type = INIT_PROCESS; /* looks for DEAD_PROCESS, LOGIN_PROCESS, USER_PROCESS, too */
strncpy(lookup.ut_id, sanitize_id(id), sizeof(lookup.ut_id));
if (!(found = getutxid(&lookup)))
found = getutxid(&lookup);
if (!found)
return 0;
if (found->ut_pid != pid)
@@ -264,7 +268,8 @@ int utmp_put_runlevel(int runlevel, int previous) {
if (previous <= 0) {
/* Find the old runlevel automatically */
if ((r = utmp_get_runlevel(&previous, NULL)) < 0) {
r = utmp_get_runlevel(&previous, NULL);
if (r < 0) {
if (r != -ESRCH)
return r;
@@ -343,16 +348,15 @@ static int write_to_terminal(const char *tty, const char *message) {
}
int utmp_wall(const char *message, bool (*match_tty)(const char *tty)) {
struct utmpx *u;
_cleanup_free_ char *text = NULL, *hn = NULL, *un = NULL, *tty = NULL;
char date[FORMAT_TIMESTAMP_MAX];
char *text = NULL, *hn = NULL, *un = NULL, *tty = NULL;
struct utmpx *u;
int r;
if (!(hn = gethostname_malloc()) ||
!(un = getlogname_malloc())) {
r = -ENOMEM;
goto finish;
}
hn = gethostname_malloc();
un = getlogname_malloc();
if (!hn || !un)
return -ENOMEM;
getttyname_harder(STDIN_FILENO, &tty);
@@ -363,19 +367,17 @@ int utmp_wall(const char *message, bool (*match_tty)(const char *tty)) {
un, hn,
tty ? " on " : "", strempty(tty),
format_timestamp(date, sizeof(date), now(CLOCK_REALTIME)),
message) < 0) {
r = -ENOMEM;
goto finish;
}
message) < 0)
return -ENOMEM;
setutxent();
r = 0;
while ((u = getutxent())) {
int q;
_cleanup_free_ char *buf = NULL;
const char *path;
char *buf = NULL;
int q;
if (u->ut_type != USER_PROCESS || u->ut_user[0] == 0)
continue;
@@ -384,27 +386,18 @@ int utmp_wall(const char *message, bool (*match_tty)(const char *tty)) {
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) {
r = -ENOMEM;
goto finish;
}
if (asprintf(&buf, "/dev/%.*s", (int) sizeof(u->ut_line), u->ut_line) < 0)
return -ENOMEM;
path = buf;
}
if (!match_tty || match_tty(path))
if ((q = write_to_terminal(path, text)) < 0)
if (!match_tty || match_tty(path)) {
q = write_to_terminal(path, text);
if (q < 0)
r = q;
free(buf);
}
}
finish:
free(hn);
free(un);
free(tty);
free(text);
return r;
}