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journal: forward messages from /dev/log unmodified to syslog.socket

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This commit is contained in:
Michal Sekletar 2018-05-30 16:27:22 +02:00 committed by Lennart Poettering
parent 65be7e0652
commit bb3ff70a86
3 changed files with 25 additions and 16 deletions
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2
src/journal/journald-server.c
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@ -1155,7 +1155,7 @@ int server_process_datagram(sd_event_source *es, int fd, uint32_t revents, void
if (fd == s->syslog_fd) {
if (n > 0 && n_fds == 0)
server_process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len);
server_process_syslog_message(s, s->buffer, n, ucred, tv, label, label_len);
else if (n_fds > 0)
log_warning("Got file descriptors via syslog socket. Ignoring.");

37
src/journal/journald-syslog.c
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@ -103,7 +103,7 @@ static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned
log_debug_errno(errno, "Failed to forward syslog message: %m");
}
static void forward_syslog_raw(Server *s, int priority, const char *buffer, const struct ucred *ucred, const struct timeval *tv) {
static void forward_syslog_raw(Server *s, int priority, const char *buffer, size_t buffer_len, const struct ucred *ucred, const struct timeval *tv) {
struct iovec iovec;
assert(s);
@ -112,7 +112,7 @@ static void forward_syslog_raw(Server *s, int priority, const char *buffer, cons
if (LOG_PRI(priority) > s->max_level_syslog)
return;
iovec = IOVEC_MAKE_STRING(buffer);
iovec = IOVEC_MAKE((char *) buffer, buffer_len);
forward_syslog_iovec(s, &iovec, 1, ucred, tv);
}
@ -302,20 +302,20 @@ static void syslog_skip_date(char **buf) {
void server_process_syslog_message(
Server *s,
const char *buf,
size_t buf_len,
const struct ucred *ucred,
const struct timeval *tv,
const char *label,
size_t label_len) {
char syslog_priority[sizeof("PRIORITY=") + DECIMAL_STR_MAX(int)],
syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int)];
syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int)], *msg;
const char *message = NULL, *syslog_identifier = NULL, *syslog_pid = NULL;
_cleanup_free_ char *identifier = NULL, *pid = NULL;
int priority = LOG_USER | LOG_INFO, r;
ClientContext *context = NULL;
struct iovec *iovec;
const char *orig;
size_t n = 0, m;
size_t n = 0, m, i;
assert(s);
assert(buf);
@ -326,26 +326,35 @@ void server_process_syslog_message(
log_warning_errno(r, "Failed to retrieve credentials for PID " PID_FMT ", ignoring: %m", ucred->pid);
}
orig = buf;
syslog_parse_priority(&buf, &priority, true);
/* We are creating copy of the message because we want to forward original message verbatim to the legacy
syslog implementation */
for (i = buf_len; i > 0; i--)
if (!strchr(WHITESPACE, buf[i-1]))
break;
msg = newa(char, i + 1);
*((char *) mempcpy(msg, buf, i)) = 0;
msg = skip_leading_chars(msg, WHITESPACE);
syslog_parse_priority((const char **)&msg, &priority, true);
if (!client_context_test_priority(context, priority))
return;
if (s->forward_to_syslog)
forward_syslog_raw(s, priority, orig, ucred, tv);
forward_syslog_raw(s, priority, buf, buf_len, ucred, tv);
syslog_skip_date((char**) &buf);
syslog_parse_identifier(&buf, &identifier, &pid);
syslog_skip_date(&msg);
syslog_parse_identifier((const char**)&msg, &identifier, &pid);
if (s->forward_to_kmsg)
server_forward_kmsg(s, priority, identifier, buf, ucred);
server_forward_kmsg(s, priority, identifier, msg, ucred);
if (s->forward_to_console)
server_forward_console(s, priority, identifier, buf, ucred);
server_forward_console(s, priority, identifier, msg, ucred);
if (s->forward_to_wall)
server_forward_wall(s, priority, identifier, buf, ucred);
server_forward_wall(s, priority, identifier, msg, ucred);
m = N_IOVEC_META_FIELDS + 6 + client_context_extra_fields_n_iovec(context);
iovec = newa(struct iovec, m);
@ -370,7 +379,7 @@ void server_process_syslog_message(
iovec[n++] = IOVEC_MAKE_STRING(syslog_pid);
}
message = strjoina("MESSAGE=", buf);
message = strjoina("MESSAGE=", msg);
if (message)
iovec[n++] = IOVEC_MAKE_STRING(message);

2
src/journal/journald-syslog.h
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@ -15,7 +15,7 @@ size_t syslog_parse_identifier(const char **buf, char **identifier, char **pid);
void server_forward_syslog(Server *s, int priority, const char *identifier, const char *message, const struct ucred *ucred, const struct timeval *tv);
void server_process_syslog_message(Server *s, const char *buf, const struct ucred *ucred, const struct timeval *tv, const char *label, size_t label_len);
void server_process_syslog_message(Server *s, const char *buf, size_t buf_len, const struct ucred *ucred, const struct timeval *tv, const char *label, size_t label_len);
int server_open_syslog_socket(Server *s);
void server_maybe_warn_forward_syslog_missed(Server *s);