/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
#if defined(__linux__)
- #include <errno.h>
- #include <stdio.h>
- #include <string.h>
+ static size_t
+ pread(const char *path, char *buf, size_t bufsiz)
+ {
+ FILE *fp;
+ size_t bytes_read;
- #include "../util.h"
+ if (!(fp = fopen(path, "r"))) {
+ warn("fopen '%s':", path);
+ return 0;
+ }
+ if (!(bytes_read = fread(buf, sizeof(char), bufsiz, fp))) {
+ warn("fread '%s':", path);
+ fclose(fp);
+ return 0;
+ }
+ fclose(fp);
+
+ buf[bytes_read] = '\0';
+
+ return bytes_read;
+ }
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));
+ if (!pread("/proc/meminfo", buf, sizeof(buf) - 1)) {
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);
+ if (!(match = strstr(buf, "SwapTotal"))) {
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)
+ if (!(match = strstr(buf, "SwapFree"))) {
return NULL;
+ }
sscanf(match, "SwapFree: %ld kB\n", &free);
- return bprintf("%f", (float)free / 1024 / 1024);
+ return fmt_human(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));
+ if (!pread("/proc/meminfo", buf, sizeof(buf) - 1)) {
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);
+ if (!(match = strstr(buf, "SwapTotal"))) {
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)
+ if (!(match = strstr(buf, "SwapCached"))) {
return NULL;
+ }
sscanf(match, "SwapCached: %ld kB\n", &cached);
- if ((match = strstr(buf, "SwapFree")) == NULL)
+ if (!(match = strstr(buf, "SwapFree"))) {
return NULL;
+ }
sscanf(match, "SwapFree: %ld kB\n", &free);
+ if (total == 0) {
+ return NULL;
+ }
+
return bprintf("%d", 100 * (total - free - cached) / total);
}
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);
+ if (!pread("/proc/meminfo", buf, sizeof(buf) - 1)) {
return NULL;
}
- fclose(fp);
- if ((match = strstr(buf, "SwapTotal")) == NULL)
+ if (!(match = strstr(buf, "SwapTotal"))) {
return NULL;
+ }
sscanf(match, "SwapTotal: %ld kB\n", &total);
- return bprintf("%f", (float)total / 1024 / 1024);
+ return fmt_human(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);
+ if (!pread("/proc/meminfo", buf, sizeof(buf) - 1)) {
return NULL;
}
- fclose(fp);
- if ((match = strstr(buf, "SwapTotal")) == NULL)
+ if (!(match = strstr(buf, "SwapTotal"))) {
return NULL;
+ }
sscanf(match, "SwapTotal: %ld kB\n", &total);
- if ((match = strstr(buf, "SwapCached")) == NULL)
+ if (!(match = strstr(buf, "SwapCached"))) {
return NULL;
+ }
sscanf(match, "SwapCached: %ld kB\n", &cached);
- if ((match = strstr(buf, "SwapFree")) == NULL)
+ if (!(match = strstr(buf, "SwapFree"))) {
return NULL;
+ }
sscanf(match, "SwapFree: %ld kB\n", &free);
- return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
+ return fmt_human((total - free - cached) * 1024, 1024);
}
#elif defined(__OpenBSD__)
- /* unimplemented */
+ #include <stdlib.h>
+ #include <sys/param.h> /* dbtob */
+ #include <sys/swap.h>
+ #include <sys/types.h>
+ #include <unistd.h>
+
+ static int
+ getstats(int *total, int *used)
+ {
+ struct swapent *sep, *fsep;
+ int rnswap, nswap, i;
+
+ if ((nswap = swapctl(SWAP_NSWAP, 0, 0)) < 1) {
+ warn("swaptctl 'SWAP_NSWAP':");
+ return 1;
+ }
+ if (!(fsep = sep = calloc(nswap, sizeof(*sep)))) {
+ warn("calloc 'nswap':");
+ return 1;
+ }
+ if ((rnswap = swapctl(SWAP_STATS, (void *)sep, nswap)) < 0) {
+ warn("swapctl 'SWAP_STATA':");
+ return 1;
+ }
+ if (nswap != rnswap) {
+ warn("getstats: SWAP_STATS != SWAP_NSWAP");
+ return 1;
+ }
+
+ *total = 0;
+ *used = 0;
+
+ for (i = 0; i < rnswap; i++) {
+ *total += sep->se_nblks >> 1;
+ *used += sep->se_inuse >> 1;
+ }
+
+ free(fsep);
+
+ return 0;
+ }
+
+ const char *
+ swap_free(void)
+ {
+ int total, used;
+
+ if (getstats(&total, &used)) {
+ return NULL;
+ }
+
+ return fmt_human((total - used) * 1024, 1024);
+ }
+
+ const char *
+ swap_perc(void)
+ {
+ int total, used;
+
+ if (getstats(&total, &used)) {
+ return NULL;
+ }
+
+ if (total == 0) {
+ return NULL;
+ }
+
+ return bprintf("%d", 100 * used / total);
+ }
+
+ const char *
+ swap_total(void)
+ {
+ int total, used;
+
+ if (getstats(&total, &used)) {
+ return NULL;
+ }
+
+ return fmt_human(total * 1024, 1024);
+ }
+
+ const char *
+ swap_used(void)
+ {
+ int total, used;
+
+ if (getstats(&total, &used)) {
+ return NULL;
+ }
+
+ return fmt_human(used * 1024, 1024);
+ }
#endif