Finished functions for getting information regarding disk usage

foreign.odin

@@ -1,5 +1,7 @@
 package sysinfo
 
-foreign {
+import c "core:c/libc"
-	statvfs :: proc(path: cstring, stat: ^Sys_statvfs) ---
+
+@(default_calling_convention = "c") foreign {
+	statvfs :: proc(path: cstring, stat: ^Sys_statvfs) -> c.int ---
 }

sysinfo.odin

@@ -242,14 +242,43 @@ get_cpu_usage_perc :: proc() -> (f64, bool) {
 	return (100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]))), true
 }
 
-get_mountpoint_total_gb :: proc(mountpoint: string) {
+get_mountpoint_total_gb :: proc(mountpoint: string) -> f64 {
 	mountpoint_statvfs: Sys_statvfs
 
-	mountpoint_cstr := strings.clone_to_cstring(mountpoint)
+	mountpoint_cstr := strings.clone_to_cstring(mountpoint, context.temp_allocator)
+
+	err := statvfs(mountpoint_cstr, &mountpoint_statvfs)
+	if err != 0 {
+		return 0
+	}
+
+	return (f64(mountpoint_statvfs.f_blocks) * f64(mountpoint_statvfs.f_bsize)) / 1073741824
+}
+
+get_mountpoint_available_gb :: proc(mountpoint: string) -> f64 {
+	mountpoint_statvfs: Sys_statvfs
+
+	mountpoint_cstr := strings.clone_to_cstring(mountpoint, context.temp_allocator)
+
+	statvfs(mountpoint_cstr, &mountpoint_statvfs)
+
+	return (f64(mountpoint_statvfs.f_bfree) * f64(mountpoint_statvfs.f_bsize)) / 1073741824
+}
+
+get_mountpoint_used_gb :: proc(mountpoint: string) -> f64 {
+	mountpoint_statvfs: Sys_statvfs
+
+	mountpoint_cstr := strings.clone_to_cstring(mountpoint, context.temp_allocator)
 
 	statvfs(mountpoint_cstr, &mountpoint_statvfs)
 
-	total := (f64(mountpoint_statvfs.f_blocks) * f64(mountpoint_statvfs.f_bsize)) / 1073741824
+	return (f64(mountpoint_statvfs.f_blocks) * f64(mountpoint_statvfs.f_bsize) - (f64(mountpoint_statvfs.f_bfree) * f64(mountpoint_statvfs.f_bsize))) / 1073741824
+}
+
+get_mountpoint_available_perc :: proc(mountpoint: string) -> f64 {
+	return (get_mountpoint_available_gb(mountpoint)/get_mountpoint_total_gb(mountpoint)) * 100
+}
 
-	fmt.println(total)
+get_mountpoint_used_perc :: proc(mountpoint: string) -> f64 {
+	return (get_mountpoint_used_gb(mountpoint)/get_mountpoint_total_gb(mountpoint)) * 100
 }

types.odin

@@ -16,4 +16,6 @@ Sys_statvfs :: struct {
 	f_fsid:     c.ulong,
 	f_flag:     c.ulong,
 	f_namemax:  c.ulong,
+
+	__f_spare:  [6]c.int
 }