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systemd/0004-shared-wtmp-utmp-don-t-clear-store_wtmp-in-utmp_put_.patch

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From 863f3ce0d050f005839f6aa41fe7bac5478a7b5e Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Fri, 19 Sep 2014 08:03:31 +0200
Subject: [PATCH] shared: wtmp-utmp - don't clear store_wtmp in
utmp_put_dead_process()
Also modernize a few other things and add comments to explain CID #1237503
and CID #1237504.
---
src/shared/utmp-wtmp.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git src/shared/utmp-wtmp.c src/shared/utmp-wtmp.c
index 30a0c03..31f13ec 100644
--- src/shared/utmp-wtmp.c
+++ src/shared/utmp-wtmp.c
@@ -92,8 +92,6 @@ int utmp_get_runlevel(int *runlevel, int *previous) {
static void init_timestamp(struct utmpx *store, usec_t t) {
assert(store);
- zero(*store);
-
if (t <= 0)
t = now(CLOCK_REALTIME);
@@ -143,7 +141,7 @@ 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. */
+ simply appended to the end; i.e. basically a log. */
errno = 0;
updwtmpx(_PATH_WTMPX, store);
@@ -172,7 +170,7 @@ static int write_entry_both(const struct utmpx *store) {
}
int utmp_put_shutdown(void) {
- struct utmpx store;
+ struct utmpx store = {};
init_entry(&store, 0);
@@ -183,7 +181,7 @@ int utmp_put_shutdown(void) {
}
int utmp_put_reboot(usec_t t) {
- struct utmpx store;
+ struct utmpx store = {};
init_entry(&store, t);
@@ -206,16 +204,17 @@ _pure_ static const char *sanitize_id(const char *id) {
}
int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line) {
- struct utmpx store;
+ struct utmpx store = {
+ .ut_type = INIT_PROCESS,
+ .ut_pid = pid,
+ .ut_session = sid,
+ };
assert(id);
init_timestamp(&store, 0);
- store.ut_type = INIT_PROCESS;
- store.ut_pid = pid;
- store.ut_session = sid;
-
+ /* 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)
@@ -225,14 +224,15 @@ int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line
}
int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
- struct utmpx lookup, store, store_wtmp, *found;
+ struct utmpx lookup = {
+ .ut_type = INIT_PROCESS /* looks for DEAD_PROCESS, LOGIN_PROCESS, USER_PROCESS, too */
+ }, store, store_wtmp, *found;
assert(id);
setutxent();
- zero(lookup);
- lookup.ut_type = INIT_PROCESS; /* looks for DEAD_PROCESS, LOGIN_PROCESS, USER_PROCESS, too */
+ /* 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);
@@ -260,7 +260,7 @@ int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
int utmp_put_runlevel(int runlevel, int previous) {
- struct utmpx store;
+ struct utmpx store = {};
int r;
assert(runlevel > 0);
--
1.7.9.2