X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/19343ff34385db441b5efc2e1a57cdd7fd95ec26..9d967498bef586b7537f622520ffea34c0b54380:/components/swap.c

diff --git a/components/swap.c b/components/swap.c
index fe779db..caa4788 100644
--- a/components/swap.c
+++ b/components/swap.c
@@ -1,11 +1,11 @@
 /* See LICENSE file for copyright and license details. */
-#if defined(__linux__)
-	#include <errno.h>
-	#include <stdio.h>
-	#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
 
-	#include "../util.h"
+#include "../util.h"
 
+#if defined(__linux__)
 	static size_t
 	pread(const char *path, char *buf, size_t bufsiz)
 	{
@@ -13,13 +13,11 @@
 		size_t bytes_read;
 
 		if (!(fp = fopen(path, "r"))) {
-			fprintf(stderr, "fopen '%s': %s\n", path,
-			        strerror(errno));
+			fprintf(stderr, "fopen '%s': %s\n", path, strerror(errno));
 			return 0;
 		}
-		if ((bytes_read = fread(buf, sizeof(char), bufsiz, fp)) == 0) {
-			fprintf(stderr, "fread '%s': %s\n", path,
-			        strerror(errno));
+		if (!(bytes_read = fread(buf, sizeof(char), bufsiz, fp))) {
+			fprintf(stderr, "fread '%s': %s\n", path, strerror(errno));
 			fclose(fp);
 			return 0;
 		}
@@ -40,12 +38,14 @@
 			return NULL;
 		}
 
-		if ((match = strstr(buf, "SwapTotal")) == NULL)
+		if (!(match = strstr(buf, "SwapTotal"))) {
 			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);
@@ -61,16 +61,19 @@
 			return NULL;
 		}
 
-		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("%d", 100 * (total - free - cached) / total);
@@ -86,8 +89,9 @@
 			return NULL;
 		}
 
-		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);
@@ -103,20 +107,103 @@
 			return NULL;
 		}
 
-		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);
 	}
 #elif defined(__OpenBSD__)
-	/* unimplemented */
+	#include <stdlib.h>
+	#include <sys/param.h> /* dbtob */
+	#include <sys/swap.h>
+	#include <sys/types.h>
+	#include <unistd.h>
+
+	static void
+	getstats(int *total, int *used)
+	{
+		struct swapent *sep, *fsep;
+		int rnswap, nswap, i;
+
+		nswap = swapctl(SWAP_NSWAP, 0, 0);
+		if (nswap < 1) {
+			fprintf(stderr, "swaptctl 'SWAP_NSWAP': %s\n", strerror(errno));
+		}
+
+		fsep = sep = calloc(nswap, sizeof(*sep));
+		if (!sep) {
+			fprintf(stderr, "calloc 'nswap': %s\n", strerror(errno));
+		}
+
+		rnswap = swapctl(SWAP_STATS, (void *)sep, nswap);
+		if (rnswap < 0) {
+			fprintf(stderr, "swapctl 'SWAP_STATA': %s\n", strerror(errno));
+		}
+
+		if (nswap != rnswap) {
+			fprintf(stderr, "SWAP_STATS != SWAP_NSWAP\n");
+		}
+
+		*total = 0;
+		*used = 0;
+
+		for (i = 0; i < rnswap; i++) {
+			*total += sep->se_nblks >> 1;
+			*used += sep->se_inuse >> 1;
+		}
+
+		free(fsep);
+	}
+
+	const char *
+	swap_free(void)
+	{
+		int total, used;
+
+		getstats(&total, &used);
+
+		return bprintf("%f", (float)(total - used) / 1024 / 1024);
+	}
+
+	const char *
+	swap_perc(void)
+	{
+		int total, used;
+
+		getstats(&total, &used);
+
+		return bprintf("%d", 100 * used / total);
+	}
+
+	const char *
+	swap_total(void)
+	{
+		int total, used;
+
+		getstats(&total, &used);
+
+		return bprintf("%f", (float)total / 1024 / 1024);
+	}
+
+	const char *
+	swap_used(void)
+	{
+		int total, used;
+
+		getstats(&total, &used);
+
+		return bprintf("%f", (float)used / 1024 / 1024);
+	}
 #endif