_public_ int sd_journal_printv(int priority, const char *format, va_list ap) {
/* FIXME: Instead of limiting things to LINE_MAX we could do a
C99 variable-length array on the stack here in a loop. */
char buffer[8 + LINE_MAX], p[STRLEN("PRIORITY=") + DECIMAL_STR_MAX(int) + 1];
struct iovec iov[2];
assert_return(priority >= 0, -EINVAL);
assert_return(priority <= 7, -EINVAL);
assert_return(format, -EINVAL);
xsprintf(p, "PRIORITY=%i", priority & LOG_PRIMASK);
memcpy(buffer, "MESSAGE=", 8);
vsnprintf(buffer+8, sizeof(buffer) - 8, format, ap);
/* Strip trailing whitespace, keep prefix whitespace. */
(void) strstrip(buffer);
/* Suppress empty lines */
if (isempty(buffer+8))
return 0;
iov[0] = IOVEC_MAKE_STRING(buffer);
iov[1] = IOVEC_MAKE_STRING(p);
return sd_journal_sendv(iov, 2);
}
_public_ int sd_journal_send_with_location(const char *file, const char *line, const char *func, const char *format, ...) {
_cleanup_free_ struct iovec *iov = NULL;
int r, i, j;
va_list ap;
char *f;
va_start(ap, format);
i = fill_iovec_sprintf(format, ap, 3, &iov);
va_end(ap);
if (_unlikely_(i < 0)) {
r = i;
goto finish;
}
ALLOCA_CODE_FUNC(f, func);
iov[0] = IOVEC_MAKE_STRING(file);
iov[1] = IOVEC_MAKE_STRING(line);
iov[2] = IOVEC_MAKE_STRING(f);
r = sd_journal_sendv(iov, i);
finish:
for (j = 3; j < i; j++)
free(iov[j].iov_base);
return r;
}
_public_ int sd_journal_perror_with_location(
const char *file, const char *line,
const char *func,
const char *message) {
struct iovec iov[6];
char *f;
ALLOCA_CODE_FUNC(f, func);
iov[0] = IOVEC_MAKE_STRING(file);
iov[1] = IOVEC_MAKE_STRING(line);
iov[2] = IOVEC_MAKE_STRING(f);
return fill_iovec_perror_and_send(message, 3, iov);
}
void server_forward_kmsg(
Server *s,
int priority,
const char *identifier,
const char *message,
const struct ucred *ucred) {
_cleanup_free_ char *ident_buf = NULL;
struct iovec iovec[5];
char header_priority[DECIMAL_STR_MAX(priority) + 3],
header_pid[STRLEN("[]: ") + DECIMAL_STR_MAX(pid_t) + 1];
int n = 0;
assert(s);
assert(priority >= 0);
assert(priority <= 999);
assert(message);
if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg))
return;
if (_unlikely_(s->dev_kmsg_fd < 0))
return;
/* Never allow messages with kernel facility to be written to
* kmsg, regardless where the data comes from. */
priority = syslog_fixup_facility(priority);
/* First: priority field */
xsprintf(header_priority, "<%i>", priority);
iovec[n++] = IOVEC_MAKE_STRING(header_priority);
/* Second: identifier and PID */
if (ucred) {
if (!identifier) {
get_process_comm(ucred->pid, &ident_buf);
identifier = ident_buf;
}
xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid);
if (identifier)
iovec[n++] = IOVEC_MAKE_STRING(identifier);
iovec[n++] = IOVEC_MAKE_STRING(header_pid);
} else if (identifier) {
iovec[n++] = IOVEC_MAKE_STRING(identifier);
iovec[n++] = IOVEC_MAKE_STRING(": ");
}
/* Fourth: message */
iovec[n++] = IOVEC_MAKE_STRING(message);
iovec[n++] = IOVEC_MAKE_STRING("\n");
if (writev(s->dev_kmsg_fd, iovec, n) < 0)
log_debug_errno(errno, "Failed to write to /dev/kmsg for logging: %m");
}
_public_ int sd_journal_sendv_with_location(
const char *file, const char *line,
const char *func,
const struct iovec *iov, int n) {
struct iovec *niov;
char *f;
assert_return(iov, -EINVAL);
assert_return(n > 0, -EINVAL);
niov = alloca(sizeof(struct iovec) * (n + 3));
memcpy(niov, iov, sizeof(struct iovec) * n);
ALLOCA_CODE_FUNC(f, func);
niov[n++] = IOVEC_MAKE_STRING(file);
niov[n++] = IOVEC_MAKE_STRING(line);
niov[n++] = IOVEC_MAKE_STRING(f);
return sd_journal_sendv(niov, n);
}
static void dev_kmsg_record(Server *s, const char *p, size_t l) {
_cleanup_free_ char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL, *identifier = NULL, *pid = NULL;
struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS + 2 + N_IOVEC_UDEV_FIELDS];
char *kernel_device = NULL;
unsigned long long usec;
size_t n = 0, z = 0, j;
int priority, r;
char *e, *f, *k;
uint64_t serial;
size_t pl;
assert(s);
assert(p);
if (l <= 0)
return;
e = memchr(p, ',', l);
if (!e)
return;
*e = 0;
r = safe_atoi(p, &priority);
if (r < 0 || priority < 0 || priority > 999)
return;
if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
return;
l -= (e - p) + 1;
p = e + 1;
e = memchr(p, ',', l);
if (!e)
return;
*e = 0;
r = safe_atou64(p, &serial);
if (r < 0)
return;
if (s->kernel_seqnum) {
/* We already read this one? */
if (serial < *s->kernel_seqnum)
return;
/* Did we lose any? */
if (serial > *s->kernel_seqnum)
server_driver_message(s, 0,
"MESSAGE_ID=" SD_MESSAGE_JOURNAL_MISSED_STR,
LOG_MESSAGE("Missed %"PRIu64" kernel messages",
serial - *s->kernel_seqnum),
NULL);
/* Make sure we never read this one again. Note that
* we always store the next message serial we expect
* here, simply because this makes handling the first
* message with serial 0 easy. */
*s->kernel_seqnum = serial + 1;
}
l -= (e - p) + 1;
p = e + 1;
f = memchr(p, ';', l);
if (!f)
return;
/* Kernel 3.6 has the flags field, kernel 3.5 lacks that */
e = memchr(p, ',', l);
if (!e || f < e)
e = f;
*e = 0;
r = safe_atollu(p, &usec);
if (r < 0)
return;
l -= (f - p) + 1;
p = f + 1;
e = memchr(p, '\n', l);
if (!e)
return;
*e = 0;
pl = e - p;
l -= (e - p) + 1;
k = e + 1;
for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) {
char *m;
/* Metadata fields attached */
if (*k != ' ')
break;
k++, l--;
e = memchr(k, '\n', l);
if (!e)
return;
*e = 0;
if (cunescape_length_with_prefix(k, e - k, "_KERNEL_", UNESCAPE_RELAX, &m) < 0)
break;
if (startswith(m, "_KERNEL_DEVICE="))
kernel_device = m + 15;
iovec[n++] = IOVEC_MAKE_STRING(m);
z++;
l -= (e - k) + 1;
k = e + 1;
}
if (kernel_device) {
struct udev_device *ud;
ud = udev_device_new_from_device_id(s->udev, kernel_device);
if (ud) {
const char *g;
struct udev_list_entry *ll;
char *b;
g = udev_device_get_devnode(ud);
if (g) {
b = strappend("_UDEV_DEVNODE=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
g = udev_device_get_sysname(ud);
if (g) {
b = strappend("_UDEV_SYSNAME=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
j = 0;
ll = udev_device_get_devlinks_list_entry(ud);
udev_list_entry_foreach(ll, ll) {
if (j > N_IOVEC_UDEV_FIELDS)
break;
g = udev_list_entry_get_name(ll);
if (g) {
b = strappend("_UDEV_DEVLINK=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
j++;
}
udev_device_unref(ud);
}
}
if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", usec) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(source_time);
iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=kernel");
if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(syslog_priority);
if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(syslog_facility);
if ((priority & LOG_FACMASK) == LOG_KERN)
iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=kernel");
else {
pl -= syslog_parse_identifier((const char**) &p, &identifier, &pid);
/* Avoid any messages we generated ourselves via
* log_info() and friends. */
if (pid && is_us(pid))
goto finish;
if (identifier) {
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
if (syslog_identifier)
iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
}
if (pid) {
syslog_pid = strappend("SYSLOG_PID=", pid);
if (syslog_pid)
iovec[n++] = IOVEC_MAKE_STRING(syslog_pid);
}
}
if (cunescape_length_with_prefix(p, pl, "MESSAGE=", UNESCAPE_RELAX, &message) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(message);
server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, priority, 0);
finish:
for (j = 0; j < z; j++)
free(iovec[j].iov_base);
}
static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_break) {
struct iovec *iovec;
int priority;
char syslog_priority[] = "PRIORITY=\0";
char syslog_facility[sizeof("SYSLOG_FACILITY=")-1 + DECIMAL_STR_MAX(int) + 1];
_cleanup_free_ char *message = NULL, *syslog_identifier = NULL;
size_t n = 0, m;
int r;
assert(s);
assert(p);
if (s->context)
(void) client_context_maybe_refresh(s->server, s->context, NULL, NULL, 0, NULL, USEC_INFINITY);
else if (pid_is_valid(s->ucred.pid)) {
r = client_context_acquire(s->server, s->ucred.pid, &s->ucred, s->label, strlen_ptr(s->label), s->unit_id, &s->context);
if (r < 0)
log_warning_errno(r, "Failed to acquire client context, ignoring: %m");
}
priority = s->priority;
if (s->level_prefix)
syslog_parse_priority(&p, &priority, false);
if (!client_context_test_priority(s->context, priority))
return 0;
if (isempty(p))
return 0;
if (s->forward_to_syslog || s->server->forward_to_syslog)
server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL);
if (s->forward_to_kmsg || s->server->forward_to_kmsg)
server_forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
if (s->forward_to_console || s->server->forward_to_console)
server_forward_console(s->server, priority, s->identifier, p, &s->ucred);
if (s->server->forward_to_wall)
server_forward_wall(s->server, priority, s->identifier, p, &s->ucred);
m = N_IOVEC_META_FIELDS + 7 + client_context_extra_fields_n_iovec(s->context);
iovec = newa(struct iovec, m);
iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=stdout");
iovec[n++] = IOVEC_MAKE_STRING(s->id_field);
syslog_priority[strlen("PRIORITY=")] = '0' + LOG_PRI(priority);
iovec[n++] = IOVEC_MAKE_STRING(syslog_priority);
if (priority & LOG_FACMASK) {
xsprintf(syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority));
iovec[n++] = IOVEC_MAKE_STRING(syslog_facility);
}
if (s->identifier) {
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
if (syslog_identifier)
iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
}
if (line_break != LINE_BREAK_NEWLINE) {
const char *c;
/* If this log message was generated due to an uncommon line break then mention this in the log
* entry */
c = line_break == LINE_BREAK_NUL ? "_LINE_BREAK=nul" :
line_break == LINE_BREAK_LINE_MAX ? "_LINE_BREAK=line-max" :
"_LINE_BREAK=eof";
iovec[n++] = IOVEC_MAKE_STRING(c);
}
message = strappend("MESSAGE=", p);
if (message)
iovec[n++] = IOVEC_MAKE_STRING(message);
server_dispatch_message(s->server, iovec, n, m, s->context, NULL, priority, 0);
return 0;
}
static int server_process_entry(
Server *s,
const void *buffer, size_t *remaining,
ClientContext *context,
const struct ucred *ucred,
const struct timeval *tv,
const char *label, size_t label_len) {
/* Process a single entry from a native message. Returns 0 if nothing special happened and the message
* processing should continue, and a negative or positive value otherwise.
*
* Note that *remaining is altered on both success and failure. */
size_t n = 0, j, tn = (size_t) -1, m = 0, entry_size = 0;
char *identifier = NULL, *message = NULL;
struct iovec *iovec = NULL;
int priority = LOG_INFO;
pid_t object_pid = 0;
const char *p;
int r = 0;
p = buffer;
while (*remaining > 0) {
const char *e, *q;
e = memchr(p, '\n', *remaining);
if (!e) {
/* Trailing noise, let's ignore it, and flush what we collected */
log_debug("Received message with trailing noise, ignoring.");
r = 1; /* finish processing of the message */
break;
}
if (e == p) {
/* Entry separator */
*remaining -= 1;
break;
}
if (IN_SET(*p, '.', '#')) {
/* Ignore control commands for now, and
* comments too. */
*remaining -= (e - p) + 1;
p = e + 1;
continue;
}
/* A property follows */
/* n existing properties, 1 new, +1 for _TRANSPORT */
if (!GREEDY_REALLOC(iovec, m,
n + 2 +
N_IOVEC_META_FIELDS + N_IOVEC_OBJECT_FIELDS +
client_context_extra_fields_n_iovec(context))) {
r = log_oom();
break;
}
q = memchr(p, '=', e - p);
if (q) {
if (journal_field_valid(p, q - p, false)) {
size_t l;
l = e - p;
/* If the field name starts with an underscore, skip the variable, since that indicates
* a trusted field */
iovec[n++] = IOVEC_MAKE((char*) p, l);
entry_size += l;
server_process_entry_meta(p, l, ucred,
&priority,
&identifier,
&message,
&object_pid);
}
*remaining -= (e - p) + 1;
p = e + 1;
continue;
} else {
uint64_t l;
char *k;
if (*remaining < e - p + 1 + sizeof(uint64_t) + 1) {
log_debug("Failed to parse message, ignoring.");
break;
}
l = unaligned_read_le64(e + 1);
if (l > DATA_SIZE_MAX) {
log_debug("Received binary data block of %"PRIu64" bytes is too large, ignoring.", l);
break;
}
if ((uint64_t) *remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
e[1+sizeof(uint64_t)+l] != '\n') {
log_debug("Failed to parse message, ignoring.");
break;
}
k = malloc((e - p) + 1 + l);
if (!k) {
log_oom();
break;
}
memcpy(k, p, e - p);
k[e - p] = '=';
memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
if (journal_field_valid(p, e - p, false)) {
iovec[n] = IOVEC_MAKE(k, (e - p) + 1 + l);
entry_size += iovec[n].iov_len;
n++;
server_process_entry_meta(k, (e - p) + 1 + l, ucred,
&priority,
&identifier,
&message,
&object_pid);
} else
free(k);
*remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
p = e + 1 + sizeof(uint64_t) + l + 1;
}
}
if (n <= 0) {
r = 1;
goto finish;
}
if (!client_context_test_priority(context, priority)) {
r = 0;
goto finish;
}
tn = n++;
iovec[tn] = IOVEC_MAKE_STRING("_TRANSPORT=journal");
entry_size += STRLEN("_TRANSPORT=journal");
if (entry_size + n + 1 > ENTRY_SIZE_MAX) { /* data + separators + trailer */
log_debug("Entry is too big with %zu properties and %zu bytes, ignoring.", n, entry_size);
goto finish;
}
if (message) {
if (s->forward_to_syslog)
server_forward_syslog(s, syslog_fixup_facility(priority), identifier, message, ucred, tv);
if (s->forward_to_kmsg)
server_forward_kmsg(s, priority, identifier, message, ucred);
if (s->forward_to_console)
server_forward_console(s, priority, identifier, message, ucred);
if (s->forward_to_wall)
server_forward_wall(s, priority, identifier, message, ucred);
}
server_dispatch_message(s, iovec, n, m, context, tv, priority, object_pid);
finish:
for (j = 0; j < n; j++) {
if (j == tn)
continue;
if (iovec[j].iov_base < buffer ||
(const char*) iovec[j].iov_base >= p + *remaining)
free(iovec[j].iov_base);
}
free(iovec);
free(identifier);
free(message);
return r;
}
int status_vprintf(const char *status, ShowStatusFlags flags, const char *format, va_list ap) {
static const char status_indent[] = " "; /* "[" STATUS "] " */
_cleanup_free_ char *s = NULL;
_cleanup_close_ int fd = -1;
struct iovec iovec[7] = {};
int n = 0;
static bool prev_ephemeral;
assert(format);
/* This is independent of logging, as status messages are
* optional and go exclusively to the console. */
if (vasprintf(&s, format, ap) < 0)
return log_oom();
/* Before you ask: yes, on purpose we open/close the console for each status line we write individually. This
* is a good strategy to avoid PID 1 getting killed by the kernel's SAK concept (it doesn't fix this entirely,
* but minimizes the time window the kernel might end up killing PID 1 due to SAK). It also makes things easier
* for us so that we don't have to recover from hangups and suchlike triggered on the console. */
fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (fd < 0)
return fd;
if (FLAGS_SET(flags, SHOW_STATUS_ELLIPSIZE)) {
char *e;
size_t emax, sl;
int c;
c = fd_columns(fd);
if (c <= 0)
c = 80;
sl = status ? sizeof(status_indent)-1 : 0;
emax = c - sl - 1;
if (emax < 3)
emax = 3;
e = ellipsize(s, emax, 50);
if (e)
free_and_replace(s, e);
}
if (prev_ephemeral)
iovec[n++] = IOVEC_MAKE_STRING(ANSI_REVERSE_LINEFEED "\r" ANSI_ERASE_TO_END_OF_LINE);
if (status) {
if (!isempty(status)) {
iovec[n++] = IOVEC_MAKE_STRING("[");
iovec[n++] = IOVEC_MAKE_STRING(status);
iovec[n++] = IOVEC_MAKE_STRING("] ");
} else
iovec[n++] = IOVEC_MAKE_STRING(status_indent);
}
iovec[n++] = IOVEC_MAKE_STRING(s);
iovec[n++] = IOVEC_MAKE_STRING("\n");
if (prev_ephemeral && !FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL))
iovec[n++] = IOVEC_MAKE_STRING(ANSI_ERASE_TO_END_OF_LINE);
prev_ephemeral = FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL) ;
if (writev(fd, iovec, n) < 0)
return -errno;
return 0;
}
_public_ int sd_journal_sendv(const struct iovec *iov, int n) {
PROTECT_ERRNO;
int fd, r;
_cleanup_close_ int buffer_fd = -1;
struct iovec *w;
uint64_t *l;
int i, j = 0;
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/journal/socket",
};
struct msghdr mh = {
.msg_name = (struct sockaddr*) &sa.sa,
.msg_namelen = SOCKADDR_UN_LEN(sa.un),
};
ssize_t k;
bool have_syslog_identifier = false;
bool seal = true;
assert_return(iov, -EINVAL);
assert_return(n > 0, -EINVAL);
w = newa(struct iovec, n * 5 + 3);
l = newa(uint64_t, n);
for (i = 0; i < n; i++) {
char *c, *nl;
if (_unlikely_(!iov[i].iov_base || iov[i].iov_len <= 1))
return -EINVAL;
c = memchr(iov[i].iov_base, '=', iov[i].iov_len);
if (_unlikely_(!c || c == iov[i].iov_base))
return -EINVAL;
have_syslog_identifier = have_syslog_identifier ||
(c == (char *) iov[i].iov_base + 17 &&
startswith(iov[i].iov_base, "SYSLOG_IDENTIFIER"));
nl = memchr(iov[i].iov_base, '\n', iov[i].iov_len);
if (nl) {
if (_unlikely_(nl < c))
return -EINVAL;
/* Already includes a newline? Bummer, then
* let's write the variable name, then a
* newline, then the size (64bit LE), followed
* by the data and a final newline */
w[j++] = IOVEC_MAKE(iov[i].iov_base, c - (char*) iov[i].iov_base);
w[j++] = IOVEC_MAKE_STRING("\n");
l[i] = htole64(iov[i].iov_len - (c - (char*) iov[i].iov_base) - 1);
w[j++] = IOVEC_MAKE(&l[i], sizeof(uint64_t));
w[j++] = IOVEC_MAKE(c + 1, iov[i].iov_len - (c - (char*) iov[i].iov_base) - 1);
} else
/* Nothing special? Then just add the line and
* append a newline */
w[j++] = iov[i];
w[j++] = IOVEC_MAKE_STRING("\n");
}
if (!have_syslog_identifier &&
string_is_safe(program_invocation_short_name)) {
/* Implicitly add program_invocation_short_name, if it
* is not set explicitly. We only do this for
* program_invocation_short_name, and nothing else
* since everything else is much nicer to retrieve
* from the outside. */
w[j++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=");
w[j++] = IOVEC_MAKE_STRING(program_invocation_short_name);
w[j++] = IOVEC_MAKE_STRING("\n");
}
fd = journal_fd();
if (_unlikely_(fd < 0))
return fd;
mh.msg_iov = w;
mh.msg_iovlen = j;
k = sendmsg(fd, &mh, MSG_NOSIGNAL);
if (k >= 0)
return 0;
/* Fail silently if the journal is not available */
if (errno == ENOENT)
return 0;
if (!IN_SET(errno, EMSGSIZE, ENOBUFS))
return -errno;
/* Message doesn't fit... Let's dump the data in a memfd or
* temporary file and just pass a file descriptor of it to the
* other side.
*
* For the temporary files we use /dev/shm instead of /tmp
* here, since we want this to be a tmpfs, and one that is
* available from early boot on and where unprivileged users
* can create files. */
buffer_fd = memfd_new(NULL);
if (buffer_fd < 0) {
if (buffer_fd == -ENOSYS) {
buffer_fd = open_tmpfile_unlinkable("/dev/shm", O_RDWR | O_CLOEXEC);
if (buffer_fd < 0)
return buffer_fd;
seal = false;
} else
return buffer_fd;
}
n = writev(buffer_fd, w, j);
if (n < 0)
return -errno;
if (seal) {
r = memfd_set_sealed(buffer_fd);
if (r < 0)
return r;
}
r = send_one_fd_sa(fd, buffer_fd, mh.msg_name, mh.msg_namelen, 0);
if (r == -ENOENT)
/* Fail silently if the journal is not available */
return 0;
return r;
}
static int fill_iovec_perror_and_send(const char *message, int skip, struct iovec iov[]) {
PROTECT_ERRNO;
size_t n, k;
k = isempty(message) ? 0 : strlen(message) + 2;
n = 8 + k + 256 + 1;
for (;;) {
char buffer[n];
char* j;
errno = 0;
j = strerror_r(_saved_errno_, buffer + 8 + k, n - 8 - k);
if (errno == 0) {
char error[STRLEN("ERRNO=") + DECIMAL_STR_MAX(int) + 1];
if (j != buffer + 8 + k)
memmove(buffer + 8 + k, j, strlen(j)+1);
memcpy(buffer, "MESSAGE=", 8);
if (k > 0) {
memcpy(buffer + 8, message, k - 2);
memcpy(buffer + 8 + k - 2, ": ", 2);
}
xsprintf(error, "ERRNO=%i", _saved_errno_);
assert_cc(3 == LOG_ERR);
iov[skip+0] = IOVEC_MAKE_STRING("PRIORITY=3");
iov[skip+1] = IOVEC_MAKE_STRING(buffer);
iov[skip+2] = IOVEC_MAKE_STRING(error);
return sd_journal_sendv(iov, skip + 3);
}
if (errno != ERANGE)
return -errno;
n *= 2;
}
}
_public_ int sd_journal_perror(const char *message) {
struct iovec iovec[3];
return fill_iovec_perror_and_send(message, 0, iovec);
}
_public_ int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix) {
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = "/run/systemd/journal/stdout",
};
_cleanup_close_ int fd = -1;
char *header;
size_t l;
int r;
assert_return(priority >= 0, -EINVAL);
assert_return(priority <= 7, -EINVAL);
fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
if (fd < 0)
return -errno;
r = connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
if (r < 0)
return -errno;
if (shutdown(fd, SHUT_RD) < 0)
return -errno;
(void) fd_inc_sndbuf(fd, SNDBUF_SIZE);
identifier = strempty(identifier);
l = strlen(identifier);
header = alloca(l + 1 + 1 + 2 + 2 + 2 + 2 + 2);
memcpy(header, identifier, l);
header[l++] = '\n';
header[l++] = '\n'; /* unit id */
header[l++] = '0' + priority;
header[l++] = '\n';
header[l++] = '0' + !!level_prefix;
header[l++] = '\n';
header[l++] = '0';
header[l++] = '\n';
header[l++] = '0';
header[l++] = '\n';
header[l++] = '0';
header[l++] = '\n';
r = loop_write(fd, header, l, false);
if (r < 0)
return r;
r = fd;
fd = -1;
return r;
}
_public_ int sd_journal_print_with_location(int priority, const char *file, const char *line, const char *func, const char *format, ...) {
int r;
va_list ap;
va_start(ap, format);
r = sd_journal_printv_with_location(priority, file, line, func, format, ap);
va_end(ap);
return r;
}
_public_ int sd_journal_printv_with_location(int priority, const char *file, const char *line, const char *func, const char *format, va_list ap) {
char buffer[8 + LINE_MAX], p[STRLEN("PRIORITY=") + DECIMAL_STR_MAX(int) + 1];
struct iovec iov[5];
char *f;
assert_return(priority >= 0, -EINVAL);
assert_return(priority <= 7, -EINVAL);
assert_return(format, -EINVAL);
xsprintf(p, "PRIORITY=%i", priority & LOG_PRIMASK);
memcpy(buffer, "MESSAGE=", 8);
vsnprintf(buffer+8, sizeof(buffer) - 8, format, ap);
/* Strip trailing whitespace, keep prefixing whitespace */
(void) strstrip(buffer);
/* Suppress empty lines */
if (isempty(buffer+8))
return 0;
/* func is initialized from __func__ which is not a macro, but
* a static const char[], hence cannot easily be prefixed with
* CODE_FUNC=, hence let's do it manually here. */
ALLOCA_CODE_FUNC(f, func);
iov[0] = IOVEC_MAKE_STRING(buffer);
iov[1] = IOVEC_MAKE_STRING(p);
iov[2] = IOVEC_MAKE_STRING(file);
iov[3] = IOVEC_MAKE_STRING(line);
iov[4] = IOVEC_MAKE_STRING(f);
return sd_journal_sendv(iov, ELEMENTSOF(iov));
}
_printf_(1, 0) static int fill_iovec_sprintf(const char *format, va_list ap, int extra, struct iovec **_iov) {
PROTECT_ERRNO;
int r, n = 0, i = 0, j;
struct iovec *iov = NULL;
assert(_iov);
if (extra > 0) {
n = MAX(extra * 2, extra + 4);
iov = malloc0(n * sizeof(struct iovec));
if (!iov) {
r = -ENOMEM;
goto fail;
}
i = extra;
}
while (format) {
struct iovec *c;
char *buffer;
va_list aq;
if (i >= n) {
n = MAX(i*2, 4);
c = realloc(iov, n * sizeof(struct iovec));
if (!c) {
r = -ENOMEM;
goto fail;
}
iov = c;
}
va_copy(aq, ap);
if (vasprintf(&buffer, format, aq) < 0) {
va_end(aq);
r = -ENOMEM;
goto fail;
}
va_end(aq);
VA_FORMAT_ADVANCE(format, ap);
(void) strstrip(buffer); /* strip trailing whitespace, keep prefixing whitespace */
iov[i++] = IOVEC_MAKE_STRING(buffer);
format = va_arg(ap, char *);
}
*_iov = iov;
return i;
fail:
for (j = 0; j < i; j++)
free(iov[j].iov_base);
free(iov);
return r;
}
