Adding free and uptime

1 files changed, 61 insertions, 0 deletions

diff --git a/toys/free.c b/toys/free.c
new file mode 100644
index 00000000..529da19a
--- /dev/null
+++ b/toys/free.c
@@ -0,0 +1,61 @@
+/* vi: set sw=4 ts=4:
+ *
+ * free.c - Display amount of free and used memory in the system.
+ *
+ * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
+ *
+ * Not in SUSv3.
+
+USE_FREE(NEWTOY(free, "gmkb", TOYFLAG_USR|TOYFLAG_BIN))
+
+config FREE
+	bool "free"
+	default y
+	help
+	  usage: free [-bkmg]
+
+	  Display the total, free and used amount of physical memory and
+	  swap space.
+	  -bkmg    Output in bytes (default), KB, MB or GB
+*/
+
+#include "toys.h"
+#include <sys/sysinfo.h>
+
+
+static unsigned long long convert(unsigned long d, unsigned int iscale,
+				unsigned int oscale)
+{
+	return ((unsigned long long)d*iscale)>>oscale;
+}
+
+void free_main(void)
+{
+	struct sysinfo info;
+	unsigned int iscale = 1;
+	unsigned int oscale = 0;
+
+	sysinfo(&info);
+	if (info.mem_unit) iscale = info.mem_unit;
+	if (toys.optflags & 1) oscale = 0;
+	if (toys.optflags & 2) oscale = 10;
+	if (toys.optflags & 4) oscale = 20;
+	if (toys.optflags & 8) oscale = 30;
+
+	printf("              total        used        free      shared     buffers\n");
+	printf("Mem:   %12llu%12llu%12llu%12llu%12llu\n",
+		convert(info.totalram, iscale, oscale),
+		convert(info.totalram-info.freeram, iscale, oscale),
+		convert(info.freeram, iscale, oscale),
+		convert(info.sharedram, iscale, oscale),
+		convert(info.bufferram, iscale, oscale));
+
+	printf("-/+ buffers/cache: %12llu%12llu\n",
+		convert(info.totalram - info.freeram - info.bufferram, iscale, oscale),
+		convert(info.freeram + info.bufferram, iscale, oscale));
+
+	printf("Swap:  %12llu%12llu%12llu\n",
+		convert(info.totalswap, iscale, oscale),
+		convert(info.totalswap - info.freeswap, iscale, oscale),
+		convert(info.freeswap, iscale, oscale));
+}