syscalls: sysinfo

kernel-src/sys/syscalls/sysinfo.c

@@ -0,0 +1,52 @@
+#include <kernel/syscalls.h>
+#include <arch/cpu.h>
+#include <kernel/pmm.h>
+#include <kernel/vmmcache.h>
+#include <kernel/proc.h>
+
+typedef struct {
+	long uptime;
+	unsigned long loads[3];
+	unsigned long totalram;
+	unsigned long freeram;
+	unsigned long sharedram;
+	unsigned long bufferram;
+	unsigned long totalswap;
+	unsigned long freeswap;
+	unsigned short procs;
+	unsigned long totalhigh;
+	unsigned long freehigh;
+	unsigned int mem_unit;
+	char _f[20 - 2 * sizeof(long) - sizeof(int)];
+} sysinfo_t;
+
+syscallret_t syscall_sysinfo(context_t *, sysinfo_t *usysinfo) {
+	syscallret_t ret = {
+		.ret = -1
+	};
+
+	size_t total_pages, free_pages;
+	pmm_getinfo(&total_pages, &free_pages);
+
+	sysinfo_t sysinfo = {
+		.uptime = timekeeper_timefromboot().s,
+		.totalram = total_pages,
+		.freeram = free_pages,
+		.sharedram = 0,
+		.bufferram = vmmcache_cachedpages,
+		.totalswap = 0,
+		.freeswap = 0,
+		.procs = proc_get_count(),
+		.totalhigh = 0,
+		.freehigh = 0,
+		.mem_unit = PAGE_SIZE
+	};
+
+	memset(sysinfo.loads, 0, sizeof(sysinfo.loads));
+	memset(sysinfo._f, 0, sizeof(sysinfo._f));
+
+	ret.errno = usercopy_touser(usysinfo, &sysinfo, sizeof(sysinfo));
+	ret.ret = ret.errno ? -1 : 0;
+
+	return ret;
+}