From d1f0177d8d525eac0e0795d67467b09b57dbe7b0 Mon Sep 17 00:00:00 2001
From: Bradley Taunt <bt@btxx.org>
Date: Thu, 18 Jan 2024 12:53:45 -0500
Subject: Initial commit on cgit platform

---
 components/ram.c | 212 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100755 components/ram.c

(limited to 'components/ram.c')

diff --git a/components/ram.c b/components/ram.c
new file mode 100755
index 0000000..15c4b74
--- /dev/null
+++ b/components/ram.c
@@ -0,0 +1,212 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+
+#include "../slstatus.h"
+#include "../util.h"
+
+#if defined(__linux__)
+	#include <stdint.h>
+
+	const char *
+	ram_free(const char *unused)
+	{
+		uintmax_t free;
+
+		if (pscanf("/proc/meminfo",
+		           "MemTotal: %ju kB\n"
+		           "MemFree: %ju kB\n"
+		           "MemAvailable: %ju kB\n",
+		           &free, &free, &free) != 3)
+			return NULL;
+
+		return fmt_human(free * 1024, 1024);
+	}
+
+	const char *
+	ram_perc(const char *unused)
+	{
+		uintmax_t total, free, buffers, cached;
+		int percent;
+
+		if (pscanf("/proc/meminfo",
+		           "MemTotal: %ju kB\n"
+		           "MemFree: %ju kB\n"
+		           "MemAvailable: %ju kB\n"
+		           "Buffers: %ju kB\n"
+		           "Cached: %ju kB\n",
+		           &total, &free, &buffers, &buffers, &cached) != 5)
+			return NULL;
+
+		if (total == 0)
+			return NULL;
+
+		percent = 100 * ((total - free) - (buffers + cached)) / total;
+		return bprintf("%d", percent);
+	}
+
+	const char *
+	ram_total(const char *unused)
+	{
+		uintmax_t total;
+
+		if (pscanf("/proc/meminfo", "MemTotal: %ju kB\n", &total)
+		    != 1)
+			return NULL;
+
+		return fmt_human(total * 1024, 1024);
+	}
+
+	const char *
+	ram_used(const char *unused)
+	{
+		uintmax_t total, free, buffers, cached, used;
+
+		if (pscanf("/proc/meminfo",
+		           "MemTotal: %ju kB\n"
+		           "MemFree: %ju kB\n"
+		           "MemAvailable: %ju kB\n"
+		           "Buffers: %ju kB\n"
+		           "Cached: %ju kB\n",
+		           &total, &free, &buffers, &buffers, &cached) != 5)
+			return NULL;
+
+		used = (total - free - buffers - cached);
+		return fmt_human(used * 1024, 1024);
+	}
+#elif defined(__OpenBSD__)
+	#include <stdlib.h>
+	#include <sys/sysctl.h>
+	#include <sys/types.h>
+	#include <unistd.h>
+
+	#define LOG1024 10
+	#define pagetok(size, pageshift) (size_t)(size << (pageshift - LOG1024))
+
+	inline int
+	load_uvmexp(struct uvmexp *uvmexp)
+	{
+		int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
+		size_t size;
+
+		size = sizeof(*uvmexp);
+
+		if (sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0)
+			return 1;
+
+		return 0;
+	}
+
+	const char *
+	ram_free(const char *unused)
+	{
+		struct uvmexp uvmexp;
+		int free_pages;
+
+		if (!load_uvmexp(&uvmexp))
+			return NULL;
+
+		free_pages = uvmexp.npages - uvmexp.active;
+		return fmt_human(pagetok(free_pages, uvmexp.pageshift) *
+				 1024, 1024);
+	}
+
+	const char *
+	ram_perc(const char *unused)
+	{
+		struct uvmexp uvmexp;
+		int percent;
+
+		if (!load_uvmexp(&uvmexp))
+			return NULL;
+
+		percent = uvmexp.active * 100 / uvmexp.npages;
+		return bprintf("%d", percent);
+	}
+
+	const char *
+	ram_total(const char *unused)
+	{
+		struct uvmexp uvmexp;
+
+		if (!load_uvmexp(&uvmexp))
+			return NULL;
+
+		return fmt_human(pagetok(uvmexp.npages,
+					 uvmexp.pageshift) * 1024, 1024);
+	}
+
+	const char *
+	ram_used(const char *unused)
+	{
+		struct uvmexp uvmexp;
+
+		if (!load_uvmexp(&uvmexp))
+			return NULL;
+
+		return fmt_human(pagetok(uvmexp.active,
+					 uvmexp.pageshift) * 1024, 1024);
+	}
+#elif defined(__FreeBSD__)
+	#include <sys/sysctl.h>
+	#include <sys/vmmeter.h>
+	#include <unistd.h>
+	#include <vm/vm_param.h>
+
+	const char *
+	ram_free(const char *unused) {
+		struct vmtotal vm_stats;
+		int mib[] = {CTL_VM, VM_TOTAL};
+		size_t len;
+
+		len = sizeof(struct vmtotal);
+		if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) < 0
+		    || !len)
+			return NULL;
+
+		return fmt_human(vm_stats.t_free * getpagesize(), 1024);
+	}
+
+	const char *
+	ram_total(const char *unused) {
+		unsigned int npages;
+		size_t len;
+
+		len = sizeof(npages);
+		if (sysctlbyname("vm.stats.vm.v_page_count",
+		                 &npages, &len, NULL, 0) < 0 || !len)
+			return NULL;
+
+		return fmt_human(npages * getpagesize(), 1024);
+	}
+
+	const char *
+	ram_perc(const char *unused) {
+		unsigned int npages;
+		unsigned int active;
+		size_t len;
+
+		len = sizeof(npages);
+		if (sysctlbyname("vm.stats.vm.v_page_count",
+		                 &npages, &len, NULL, 0) < 0 || !len)
+			return NULL;
+
+		if (sysctlbyname("vm.stats.vm.v_active_count",
+		                 &active, &len, NULL, 0) < 0 || !len)
+			return NULL;
+
+		return bprintf("%d", active * 100 / npages);
+	}
+
+	const char *
+	ram_used(const char *unused) {
+		unsigned int active;
+		size_t len;
+
+		len = sizeof(active);
+		if (sysctlbyname("vm.stats.vm.v_active_count",
+		                 &active, &len, NULL, 0) < 0 || !len)
+			return NULL;
+
+		return fmt_human(active * getpagesize(), 1024);
+	}
+#endif
-- 
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