1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include "../block.h"
#include "../any_log.h"
typedef struct {
block_text_t block;
char *format;
} block_ram_t;
static const struct timespec block_ram_interval = {
.tv_sec = 1,
.tv_nsec = 0,
};
static void block_ram_update(block_t *block)
{
const char *path = "/proc/meminfo";
FILE *meminfo = fopen(path, "rb");
if (meminfo == NULL) {
log_value_debug("Failed to open meminfo",
"s:label", block->label,
"s:path", path,
"i:errno", errno);
return;
}
uintmax_t total, unused, available, buffers, cached;
int n = fscanf(meminfo,
"MemTotal: %ju kB\n"
"MemFree: %ju kB\n"
"MemAvailable: %ju kB\n"
"Buffers: %ju kB\n"
"Cached: %ju kB\n",
&total, &unused, &available, &buffers, &cached);
fclose(meminfo);
if (n != 5) {
log_value_debug("Failed to read meminfo",
"s:label", block->label,
"i:errno", errno);
return;
}
static const char *ram_formats[] = {
"total",
"free",
"used",
"free-percentage",
"used-percentage",
NULL,
};
char buffer[32][5] = { 0 };
snprintf(buffer[0], 32, "%ld", total);
snprintf(buffer[1], 32, "%ld", available);
snprintf(buffer[2], 32, "%ld", total - available);
snprintf(buffer[3], 32, "%ld", 100 * available / total);
snprintf(buffer[4], 32, "%ld", 100 * (total - available) / total);
const char *ram_values[] = {
buffer[0],
buffer[1],
buffer[2],
buffer[3],
buffer[4],
NULL,
};
block_ram_t *ram = (block_ram_t *)block;
free(ram->block.text);
ram->block.text = strformat(ram->format, '%', ram_formats, ram_values);
assert(ram->block.text != NULL);
}
static block_t *block_ram_alloc(const block_scheme_t *scheme)
{
block_t *block = calloc(1, sizeof(block_ram_t));
block->type = BLOCK_TEXT;
block->update_interval = block_ram_interval;
block->update_fn = block_ram_update;
return block;
}
static void block_ram_clean(block_t *block)
{
block_ram_t *ram = (block_ram_t *)block;
free(ram->format);
free(ram->block.text);
}
static bool block_ram_validate(block_t *block, const block_scheme_t *scheme)
{
block_ram_t *ram = (block_ram_t *)block;
if (ram->block.text == NULL) {
log_error("Block '%s' requires key '%s'", block->label, "text");
return false;
}
if (strstr(ram->block.text, "%{") == NULL) {
log_warn("Block '%s' does not use any ram variable", block->label);
block->update_fn = NULL;
log_debug("Disabled updates for block '%s'", block->label);
return true;
}
ram->format = ram->block.text;
ram->block.text = strcopy("?");
return true;
}
const block_scheme_t block_ram_scheme = {
.name = "ram",
.entries = NULL,
.alloc_fn = block_ram_alloc,
.clean_fn = block_ram_clean,
.validate_fn = block_ram_validate,
.resolve_fn = NULL,
};
|
