commit c5182bee36ba93429321a7178a6c67c4aea8ac61
parent 641c7e79f3add3b6decdbacf51119a908d458a33
Author: sin <sin@2f30.org>
Date: Thu, 15 Aug 2013 16:02:53 +0100
Add free(1)
Diffstat:
| M | Makefile | | | 1 | + |
| A | free.c | | | 69 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -18,6 +18,7 @@ SRC = \
chvt.c \
df.c \
dmesg.c \
+ free.c \
halt.c \
insmod.c \
lsmod.c \
diff --git a/free.c b/free.c
@@ -0,0 +1,69 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/sysinfo.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+ eprintf("usage: %s [-bkmg]\n", argv0);
+}
+
+static unsigned int mem_unit = 1;
+static unsigned int unit_shift;
+
+static unsigned long long
+scale(unsigned long long v)
+{
+ return (v * mem_unit) >> unit_shift;
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct sysinfo info;
+
+ sysinfo(&info);
+ mem_unit = info.mem_unit ? info.mem_unit : 1;
+
+ ARGBEGIN {
+ case 'b':
+ unit_shift = 0;
+ break;
+ case 'k':
+ unit_shift = 10;
+ break;
+ case 'm':
+ unit_shift = 20;
+ break;
+ case 'g':
+ unit_shift = 30;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ printf(" %13s%13s%13s%13s%13s\n",
+ "total",
+ "used",
+ "free",
+ "shared", "buffers");
+ printf("Mem: ");
+ printf("%13llu%13llu%13llu%13llu%13llu\n",
+ scale(info.totalram),
+ scale(info.totalram - info.freeram),
+ scale(info.freeram),
+ scale(info.sharedram),
+ scale(info.bufferram));
+ printf("-/+ buffers/cache:");
+ printf("%13llu%13llu\n",
+ scale(info.totalram - info.freeram - info.bufferram),
+ scale(info.freeram + info.bufferram));
+ printf("Swap:");
+ printf("%13llu%13llu%13llu\n",
+ scale(info.totalswap),
+ scale(info.totalswap - info.freeswap),
+ scale(info.freeswap));
+ return 0;
+}
