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syslogd: Close open UNIX and inet sockets on SIGTERM

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When creating Inet sockets we may get multiple struct addrinfo records.
With this patch we support up to 16 records per Internet peer.  When
closing we iterate over all peers and all records.

Refactor socket_close() to clean up any lingering socket path when
closing UNIX socket.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson 2019-11-13 18:41:17 +01:00
parent 4192e543a5
commit 54edca09d9
3 changed files with 34 additions and 17 deletions
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19
src/socket.c
View File

@ -186,18 +186,23 @@ err: close(sd);
int socket_close(int sd)
{
struct sockaddr_un *sun;
struct sock *entry, *tmp;
LIST_FOREACH_SAFE(entry, &sl, link, tmp) {
if (entry->sd == sd) {
LIST_REMOVE(entry, link);
close(entry->sd);
if (entry->ai.ai_family == AF_UNIX)
free(entry->ai.ai_addr);
free(entry);
if (entry->sd != sd)
continue;
return 0;
LIST_REMOVE(entry, link);
close(entry->sd);
if (entry->ai.ai_family == AF_UNIX) {
sun = (struct sockaddr_un *)entry->ai.ai_addr;
(void)unlink(sun->sun_path);
}
free(entry->ai.ai_addr);
free(entry);
return 0;
}
errno = ENOENT;

29
src/syslogd.c
View File

@ -572,6 +572,8 @@ static void create_unix_socket(struct peer *pe)
if (sd < 0)
goto err;
logit("Created UNIX socket %d ...\n", sd);
pe->pe_sock[pe->pe_socknum++] = sd;
return;
err:
ERR("cannot create %s", pe->pe_name);
@ -658,6 +660,11 @@ static void create_inet_socket(struct peer *pe)
}
for (r = res; r; r = r->ai_next) {
if (pe->pe_socknum + 1 >= NELEMS(pe->pe_sock)) {
WARN("Only %zd IP addresses per socket supported.", NELEMS(pe->pe_sock));
break;
}
if (SecureMode)
r->ai_flags |= AI_SECURE;
else
@ -667,7 +674,8 @@ static void create_inet_socket(struct peer *pe)
if (sd < 0)
continue;
logit("Created inet socket %d ...\n", sd);
logit("Created inet socket %d for %s:%s ...\n", sd, pe->pe_name, pe->pe_serv);
pe->pe_sock[pe->pe_socknum++] = sd;
}
freeaddrinfo(res);
@ -1973,6 +1981,7 @@ void die(int signo)
{
struct filed *f, *next;
int was_initialized = Initialized;
struct peer *pe, *penext;
Initialized = 0; /* Don't log SIGCHLDs in case we
receive one during exiting */
@ -2011,14 +2020,16 @@ void die(int signo)
free(f);
}
/* Close the UNIX sockets. */
/* XXX */
/* Close the inet sockets. */
/* XXX */
/* Clean-up UNIX sockets. */
/* XXX */
/*
* Close all UNIX and inet sockets
*/
SIMPLEQ_FOREACH_SAFE(pe, &pqueue, pe_link, penext) {
for (size_t i = 0; i < pe->pe_socknum; i++) {
logit("Closing socket %d ...\n", pe->pe_sock[i]);
socket_close(pe->pe_sock[i]);
}
free(pe);
}
exit(0);
}

3
src/syslogd.h
View File

@ -190,7 +190,8 @@ struct peer {
const char *pe_name;
const char *pe_serv;
mode_t pe_mode;
int pe_sock;
int pe_sock[16];
size_t pe_socknum;
};
/*