9750a3d731
Granted, this style is definitely not common, but for the short utility-functions of this program it's just the right choice. This provides great flexibility, such that in the long run, it will be possible to also share code between the OS-implementations. This also keeps the state-keeping at a minimum and makes it clearer which functions are implemented on which OS without having to jiggle around with too many files in the process.
152 lines
3.4 KiB
C
152 lines
3.4 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);
|
|
}
|
|
#elif defined(__OpenBSD__)
|
|
/* unimplemented */
|
|
#endif
|