This source file includes following definitions.
- prefix_timestamp
- server_forward_console
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include "fileio.h"
#include "journald-server.h"
#include "journald-console.h"
static bool prefix_timestamp(void) {
static int cached_printk_time = -1;
if (_unlikely_(cached_printk_time < 0)) {
_cleanup_free_ char *p = NULL;
cached_printk_time =
read_one_line_file("/sys/module/printk/parameters/time", &p) >= 0
&& parse_boolean(p) > 0;
}
return cached_printk_time;
}
void server_forward_console(
Server *s,
int priority,
const char *identifier,
const char *message,
struct ucred *ucred) {
struct iovec iovec[5];
char header_pid[16];
struct timespec ts;
char tbuf[4 + DECIMAL_STR_MAX(ts.tv_sec) + DECIMAL_STR_MAX(ts.tv_nsec)-3 + 1];
int n = 0, fd;
_cleanup_free_ char *ident_buf = NULL;
const char *tty;
assert(s);
assert(message);
if (LOG_PRI(priority) > s->max_level_console)
return;
if (prefix_timestamp()) {
assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
snprintf(tbuf, sizeof(tbuf), "[%5"PRI_TIME".%06ld] ",
ts.tv_sec,
ts.tv_nsec / 1000);
IOVEC_SET_STRING(iovec[n++], tbuf);
}
if (ucred) {
if (!identifier) {
get_process_comm(ucred->pid, &ident_buf);
identifier = ident_buf;
}
snprintf(header_pid, sizeof(header_pid), "["PID_FMT"]: ", ucred->pid);
char_array_0(header_pid);
if (identifier)
IOVEC_SET_STRING(iovec[n++], identifier);
IOVEC_SET_STRING(iovec[n++], header_pid);
} else if (identifier) {
IOVEC_SET_STRING(iovec[n++], identifier);
IOVEC_SET_STRING(iovec[n++], ": ");
}
IOVEC_SET_STRING(iovec[n++], message);
IOVEC_SET_STRING(iovec[n++], "\n");
tty = s->tty_path ? s->tty_path : "/dev/console";
fd = open_terminal(tty, O_WRONLY|O_NOCTTY|O_CLOEXEC);
if (fd < 0) {
log_debug("Failed to open %s for logging: %m", tty);
return;
}
if (writev(fd, iovec, n) < 0)
log_debug("Failed to write to %s for logging: %m", tty);
safe_close(fd);
}