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#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)
{
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,
};
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);
}
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 = NULL;
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,
};
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