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663996b3 MS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
60f067b4 | 22 | #include <time.h> |
663996b3 | 23 | #include <fcntl.h> |
663996b3 MS |
24 | #include <sys/socket.h> |
25 | ||
60f067b4 | 26 | #include "fileio.h" |
663996b3 MS |
27 | #include "journald-server.h" |
28 | #include "journald-console.h" | |
e3bff60a MP |
29 | #include "formats-util.h" |
30 | #include "process-util.h" | |
31 | #include "terminal-util.h" | |
663996b3 | 32 | |
60f067b4 JS |
33 | static bool prefix_timestamp(void) { |
34 | ||
35 | static int cached_printk_time = -1; | |
36 | ||
37 | if (_unlikely_(cached_printk_time < 0)) { | |
38 | _cleanup_free_ char *p = NULL; | |
39 | ||
40 | cached_printk_time = | |
41 | read_one_line_file("/sys/module/printk/parameters/time", &p) >= 0 | |
42 | && parse_boolean(p) > 0; | |
43 | } | |
44 | ||
45 | return cached_printk_time; | |
46 | } | |
47 | ||
663996b3 MS |
48 | void server_forward_console( |
49 | Server *s, | |
50 | int priority, | |
51 | const char *identifier, | |
52 | const char *message, | |
f47781d8 | 53 | const struct ucred *ucred) { |
663996b3 | 54 | |
60f067b4 | 55 | struct iovec iovec[5]; |
60f067b4 | 56 | struct timespec ts; |
e735f4d4 MP |
57 | char tbuf[sizeof("[] ")-1 + DECIMAL_STR_MAX(ts.tv_sec) + DECIMAL_STR_MAX(ts.tv_nsec)-3 + 1]; |
58 | char header_pid[sizeof("[]: ")-1 + DECIMAL_STR_MAX(pid_t)]; | |
663996b3 | 59 | int n = 0, fd; |
60f067b4 | 60 | _cleanup_free_ char *ident_buf = NULL; |
663996b3 MS |
61 | const char *tty; |
62 | ||
63 | assert(s); | |
64 | assert(message); | |
65 | ||
66 | if (LOG_PRI(priority) > s->max_level_console) | |
67 | return; | |
68 | ||
60f067b4 JS |
69 | /* First: timestamp */ |
70 | if (prefix_timestamp()) { | |
71 | assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0); | |
e735f4d4 | 72 | xsprintf(tbuf, "[%5"PRI_TIME".%06ld] ", |
60f067b4 JS |
73 | ts.tv_sec, |
74 | ts.tv_nsec / 1000); | |
75 | IOVEC_SET_STRING(iovec[n++], tbuf); | |
76 | } | |
77 | ||
78 | /* Second: identifier and PID */ | |
663996b3 MS |
79 | if (ucred) { |
80 | if (!identifier) { | |
81 | get_process_comm(ucred->pid, &ident_buf); | |
82 | identifier = ident_buf; | |
83 | } | |
84 | ||
e735f4d4 | 85 | xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid); |
663996b3 MS |
86 | |
87 | if (identifier) | |
88 | IOVEC_SET_STRING(iovec[n++], identifier); | |
89 | ||
90 | IOVEC_SET_STRING(iovec[n++], header_pid); | |
91 | } else if (identifier) { | |
92 | IOVEC_SET_STRING(iovec[n++], identifier); | |
93 | IOVEC_SET_STRING(iovec[n++], ": "); | |
94 | } | |
95 | ||
60f067b4 | 96 | /* Fourth: message */ |
663996b3 MS |
97 | IOVEC_SET_STRING(iovec[n++], message); |
98 | IOVEC_SET_STRING(iovec[n++], "\n"); | |
99 | ||
100 | tty = s->tty_path ? s->tty_path : "/dev/console"; | |
101 | ||
102 | fd = open_terminal(tty, O_WRONLY|O_NOCTTY|O_CLOEXEC); | |
103 | if (fd < 0) { | |
f47781d8 | 104 | log_debug_errno(errno, "Failed to open %s for logging: %m", tty); |
60f067b4 | 105 | return; |
663996b3 MS |
106 | } |
107 | ||
108 | if (writev(fd, iovec, n) < 0) | |
f47781d8 | 109 | log_debug_errno(errno, "Failed to write to %s for logging: %m", tty); |
663996b3 | 110 | |
60f067b4 | 111 | safe_close(fd); |
663996b3 | 112 | } |