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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
15bd9a28 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
b5efdb8a | 21 | #include "alloc-util.h" |
8b43440b | 22 | #include "fd-util.h" |
afc5dbf3 | 23 | #include "io-util.h" |
6bedfcbb LP |
24 | #include "parse-util.h" |
25 | #include "show-status.h" | |
07630cea | 26 | #include "string-util.h" |
8b43440b | 27 | #include "terminal-util.h" |
15bd9a28 LP |
28 | #include "util.h" |
29 | ||
30 | int parse_show_status(const char *v, ShowStatus *ret) { | |
31 | int r; | |
32 | ||
33 | assert(v); | |
34 | assert(ret); | |
35 | ||
36 | if (streq(v, "auto")) { | |
37 | *ret = SHOW_STATUS_AUTO; | |
38 | return 0; | |
39 | } | |
40 | ||
41 | r = parse_boolean(v); | |
42 | if (r < 0) | |
43 | return r; | |
44 | ||
45 | *ret = r ? SHOW_STATUS_YES : SHOW_STATUS_NO; | |
46 | return 0; | |
47 | } | |
b8faf2ec LP |
48 | |
49 | int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) { | |
50 | static const char status_indent[] = " "; /* "[" STATUS "] " */ | |
51 | _cleanup_free_ char *s = NULL; | |
52 | _cleanup_close_ int fd = -1; | |
53 | struct iovec iovec[6] = {}; | |
54 | int n = 0; | |
55 | static bool prev_ephemeral; | |
56 | ||
57 | assert(format); | |
58 | ||
59 | /* This is independent of logging, as status messages are | |
60 | * optional and go exclusively to the console. */ | |
61 | ||
62 | if (vasprintf(&s, format, ap) < 0) | |
63 | return log_oom(); | |
64 | ||
8ae2c630 LP |
65 | /* Before you ask: yes, on purpose we open/close the console for each status line we write individually. This |
66 | * is a good strategy to avoid PID 1 getting killed by the kernel's SAK concept (it doesn't fix this entirely, | |
67 | * but minimizes the time window the kernel might end up killing PID 1 due to SAK). It also makes things easier | |
68 | * for us so that we don't have to recover from hangups and suchlike triggered on the console. */ | |
69 | ||
b8faf2ec LP |
70 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
71 | if (fd < 0) | |
72 | return fd; | |
73 | ||
74 | if (ellipse) { | |
75 | char *e; | |
76 | size_t emax, sl; | |
77 | int c; | |
78 | ||
79 | c = fd_columns(fd); | |
80 | if (c <= 0) | |
81 | c = 80; | |
82 | ||
83 | sl = status ? sizeof(status_indent)-1 : 0; | |
84 | ||
85 | emax = c - sl - 1; | |
86 | if (emax < 3) | |
87 | emax = 3; | |
88 | ||
89 | e = ellipsize(s, emax, 50); | |
90 | if (e) { | |
91 | free(s); | |
92 | s = e; | |
93 | } | |
94 | } | |
95 | ||
96 | if (prev_ephemeral) | |
e6a7ec4b | 97 | iovec[n++] = IOVEC_MAKE_STRING("\r" ANSI_ERASE_TO_END_OF_LINE); |
b8faf2ec LP |
98 | prev_ephemeral = ephemeral; |
99 | ||
100 | if (status) { | |
101 | if (!isempty(status)) { | |
e6a7ec4b LP |
102 | iovec[n++] = IOVEC_MAKE_STRING("["); |
103 | iovec[n++] = IOVEC_MAKE_STRING(status); | |
104 | iovec[n++] = IOVEC_MAKE_STRING("] "); | |
b8faf2ec | 105 | } else |
e6a7ec4b | 106 | iovec[n++] = IOVEC_MAKE_STRING(status_indent); |
b8faf2ec LP |
107 | } |
108 | ||
e6a7ec4b | 109 | iovec[n++] = IOVEC_MAKE_STRING(s); |
b8faf2ec | 110 | if (!ephemeral) |
e6a7ec4b | 111 | iovec[n++] = IOVEC_MAKE_STRING("\n"); |
b8faf2ec LP |
112 | |
113 | if (writev(fd, iovec, n) < 0) | |
114 | return -errno; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) { | |
120 | va_list ap; | |
121 | int r; | |
122 | ||
123 | assert(format); | |
124 | ||
125 | va_start(ap, format); | |
126 | r = status_vprintf(status, ellipse, ephemeral, format, ap); | |
127 | va_end(ap); | |
128 | ||
129 | return r; | |
130 | } |