1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <fcntl.h>
4 #include <sys/stat.h>
5 #include <sys/types.h>
6
7 #include "alloc-util.h"
8 #include "fd-util.h"
9 #include "io-util.h"
10 #include "parse-util.h"
11 #include "show-status.h"
12 #include "string-table.h"
13 #include "string-util.h"
14 #include "terminal-util.h"
15 #include "util.h"
16
17 static const char* const show_status_table[_SHOW_STATUS_MAX] = {
18 [SHOW_STATUS_NO] = "no",
19 [SHOW_STATUS_ERROR] = "error",
20 [SHOW_STATUS_AUTO] = "auto",
21 [SHOW_STATUS_TEMPORARY] = "temporary",
22 [SHOW_STATUS_YES] = "yes",
23 };
24
25 DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(show_status, ShowStatus, SHOW_STATUS_YES);
26
parse_show_status(const char * v,ShowStatus * ret)27 int parse_show_status(const char *v, ShowStatus *ret) {
28 ShowStatus s;
29
30 assert(ret);
31
32 s = show_status_from_string(v);
33 if (s < 0 || s == SHOW_STATUS_TEMPORARY)
34 return -EINVAL;
35
36 *ret = s;
37 return 0;
38 }
39
status_vprintf(const char * status,ShowStatusFlags flags,const char * format,va_list ap)40 int status_vprintf(const char *status, ShowStatusFlags flags, const char *format, va_list ap) {
41 static const char status_indent[] = " "; /* "[" STATUS "] " */
42 _cleanup_free_ char *s = NULL;
43 _cleanup_close_ int fd = -1;
44 struct iovec iovec[7] = {};
45 int n = 0;
46 static bool prev_ephemeral;
47
48 assert(format);
49
50 /* This is independent of logging, as status messages are
51 * optional and go exclusively to the console. */
52
53 if (vasprintf(&s, format, ap) < 0)
54 return log_oom();
55
56 /* Before you ask: yes, on purpose we open/close the console for each status line we write individually. This
57 * is a good strategy to avoid PID 1 getting killed by the kernel's SAK concept (it doesn't fix this entirely,
58 * but minimizes the time window the kernel might end up killing PID 1 due to SAK). It also makes things easier
59 * for us so that we don't have to recover from hangups and suchlike triggered on the console. */
60
61 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
62 if (fd < 0)
63 return fd;
64
65 if (FLAGS_SET(flags, SHOW_STATUS_ELLIPSIZE)) {
66 char *e;
67 size_t emax, sl;
68 int c;
69
70 c = fd_columns(fd);
71 if (c <= 0)
72 c = 80;
73
74 sl = status ? sizeof(status_indent)-1 : 0;
75
76 emax = c - sl - 1;
77 if (emax < 3)
78 emax = 3;
79
80 e = ellipsize(s, emax, 50);
81 if (e)
82 free_and_replace(s, e);
83 }
84
85 if (prev_ephemeral)
86 iovec[n++] = IOVEC_MAKE_STRING(ANSI_REVERSE_LINEFEED "\r" ANSI_ERASE_TO_END_OF_LINE);
87
88 if (status) {
89 if (!isempty(status)) {
90 iovec[n++] = IOVEC_MAKE_STRING("[");
91 iovec[n++] = IOVEC_MAKE_STRING(status);
92 iovec[n++] = IOVEC_MAKE_STRING("] ");
93 } else
94 iovec[n++] = IOVEC_MAKE_STRING(status_indent);
95 }
96
97 iovec[n++] = IOVEC_MAKE_STRING(s);
98 iovec[n++] = IOVEC_MAKE_STRING("\n");
99
100 if (prev_ephemeral && !FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL))
101 iovec[n++] = IOVEC_MAKE_STRING(ANSI_ERASE_TO_END_OF_LINE);
102 prev_ephemeral = FLAGS_SET(flags, SHOW_STATUS_EPHEMERAL) ;
103
104 if (writev(fd, iovec, n) < 0)
105 return -errno;
106
107 return 0;
108 }
109
status_printf(const char * status,ShowStatusFlags flags,const char * format,...)110 int status_printf(const char *status, ShowStatusFlags flags, const char *format, ...) {
111 va_list ap;
112 int r;
113
114 assert(format);
115
116 va_start(ap, format);
117 r = status_vprintf(status, flags, format, ap);
118 va_end(ap);
119
120 return r;
121 }
122
123 static const char* const status_unit_format_table[_STATUS_UNIT_FORMAT_MAX] = {
124 [STATUS_UNIT_FORMAT_NAME] = "name",
125 [STATUS_UNIT_FORMAT_DESCRIPTION] = "description",
126 [STATUS_UNIT_FORMAT_COMBINED] = "combined",
127 };
128
129 DEFINE_STRING_TABLE_LOOKUP(status_unit_format, StatusUnitFormat);
130