mirror of
https://github.com/pikami/slstatus.git
synced 2024-11-27 13:55:41 +00:00
faa52bdcc0
Make use of strerror(errno) and format all errors equally: function ['parameters']: error message
139 lines
3.0 KiB
C
139 lines
3.0 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#if defined(__linux__)
|
|
#include <errno.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) {
|
|
fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
|
|
fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
|
|
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) {
|
|
fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
|
|
fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
|
|
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) {
|
|
fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
|
|
return NULL;
|
|
}
|
|
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
|
|
fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
|
|
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) {
|
|
fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
|
|
return NULL;
|
|
}
|
|
if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
|
|
fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
|
|
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);
|
|
}
|
|
#endif
|