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#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include "scheme.h"
#include "../any_log.h"
static void block_ram_update(block_t *block)
{
FILE *meminfo = fopen("/proc/meminfo", "rb");
assert(meminfo != NULL);
uintmax_t total, unused, available, buffers, cached;
assert(5 == 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);
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,
};
free(block->text.text);
block->text.text = strformat(block->state, '%', ram_formats, ram_values);
assert(block->text.text != NULL);
}
static void block_ram_finalize(block_t *block)
{
free(block->state);
}
static bool block_ram_validate(block_t *block, const block_scheme_t *scheme)
{
if (block->text.text == NULL) {
log_error("Block '%s' requires key '%s'", block->label, "text");
return false;
}
block->state = block->text.text;
block->text.text = NULL;
if (strstr(block->state, "%{") == NULL) {
log_warn("Block '%s' does not use any ram variable", block->label);
block->update_cb = NULL;
log_debug("Disabled updates for block '%s'", block->label);
return true;
}
return true;
}
const block_scheme_t block_ram_scheme = {
.name = "ram",
.block = {
.type = BLOCK_TEXT,
.update_interval = {
.tv_sec = 1,
.tv_nsec = 0,
},
.update_cb = block_ram_update,
.finalize_cb = block_ram_finalize,
},
.size = sizeof(char *),
.entries = NULL,
.validate = block_ram_validate,
};
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