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- /* See LICENSE file for copyright and license details. */
- #include <err.h>
- #include <stdio.h>
- #include <string.h>
-
- #include "util.h"
-
- const char *
- swap_free(void)
- {
- long total, free;
- FILE *fp;
- size_t bytes_read;
- char *match;
-
- fp = fopen("/proc/meminfo", "r");
- if (fp == NULL) {
- warn("Failed to open file /proc/meminfo");
- return NULL;
- }
-
- if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
- warn("swap_free: read error");
- fclose(fp);
- return NULL;
- }
- fclose(fp);
-
- if ((match = strstr(buf, "SwapTotal")) == NULL)
- return NULL;
- sscanf(match, "SwapTotal: %ld kB\n", &total);
-
- if ((match = strstr(buf, "SwapFree")) == NULL)
- return NULL;
- sscanf(match, "SwapFree: %ld kB\n", &free);
-
- return bprintf("%f", (float)free / 1024 / 1024);
- }
-
- const char *
- swap_perc(void)
- {
- long total, free, cached;
- FILE *fp;
- size_t bytes_read;
- char *match;
-
- fp = fopen("/proc/meminfo", "r");
- if (fp == NULL) {
- warn("Failed to open file /proc/meminfo");
- return NULL;
- }
-
- if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
- warn("swap_perc: read error");
- fclose(fp);
- return NULL;
- }
- fclose(fp);
-
- if ((match = strstr(buf, "SwapTotal")) == NULL)
- return NULL;
- sscanf(match, "SwapTotal: %ld kB\n", &total);
-
- if ((match = strstr(buf, "SwapCached")) == NULL)
- return NULL;
- sscanf(match, "SwapCached: %ld kB\n", &cached);
-
- if ((match = strstr(buf, "SwapFree")) == NULL)
- return NULL;
- sscanf(match, "SwapFree: %ld kB\n", &free);
-
- return bprintf("%d", 100 * (total - free - cached) / total);
- }
-
- const char *
- swap_total(void)
- {
- long total;
- FILE *fp;
- size_t bytes_read;
- char *match;
-
- fp = fopen("/proc/meminfo", "r");
- if (fp == NULL) {
- warn("Failed to open file /proc/meminfo");
- return NULL;
- }
- if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
- warn("swap_total: read error");
- fclose(fp);
- return NULL;
- }
- fclose(fp);
-
- if ((match = strstr(buf, "SwapTotal")) == NULL)
- return NULL;
- sscanf(match, "SwapTotal: %ld kB\n", &total);
-
- return bprintf("%f", (float)total / 1024 / 1024);
- }
-
- const char *
- swap_used(void)
- {
- long total, free, cached;
- FILE *fp;
- size_t bytes_read;
- char *match;
-
- fp = fopen("/proc/meminfo", "r");
- if (fp == NULL) {
- warn("Failed to open file /proc/meminfo");
- return NULL;
- }
- if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
- warn("swap_used: read error");
- fclose(fp);
- return NULL;
- }
- fclose(fp);
-
- if ((match = strstr(buf, "SwapTotal")) == NULL)
- return NULL;
- sscanf(match, "SwapTotal: %ld kB\n", &total);
-
- if ((match = strstr(buf, "SwapCached")) == NULL)
- return NULL;
- sscanf(match, "SwapCached: %ld kB\n", &cached);
-
- if ((match = strstr(buf, "SwapFree")) == NULL)
- return NULL;
- sscanf(match, "SwapFree: %ld kB\n", &free);
-
- return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
- }
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