/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2011 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <fcntl.h> #include <sys/socket.h> #include <time.h> #include "alloc-util.h" #include "fd-util.h" #include "fileio.h" #include "formats-util.h" #include "io-util.h" #include "journald-console.h" #include "journald-server.h" #include "parse-util.h" #include "process-util.h" #include "stdio-util.h" #include "terminal-util.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, const struct ucred *ucred) { struct iovec iovec[5]; struct timespec ts; char tbuf[sizeof("[] ")-1 + DECIMAL_STR_MAX(ts.tv_sec) + DECIMAL_STR_MAX(ts.tv_nsec)-3 + 1]; char header_pid[sizeof("[]: ")-1 + DECIMAL_STR_MAX(pid_t)]; 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; /* First: timestamp */ if (prefix_timestamp()) { assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0); xsprintf(tbuf, "[%5"PRI_TIME".%06ld] ", ts.tv_sec, ts.tv_nsec / 1000); IOVEC_SET_STRING(iovec[n++], tbuf); } /* 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_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++], ": "); } /* Fourth: message */ 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_errno(fd, "Failed to open %s for logging: %m", tty); return; } if (writev(fd, iovec, n) < 0) log_debug_errno(errno, "Failed to write to %s for logging: %m", tty); safe_close(fd); }