DIR: Add correct bytes free.

1 files changed, 20 insertions, 2 deletions

diff --git a/src/eval.zig b/src/eval.zig
index bc39887..88c27b7 100644
--- a/src/eval.zig
+++ b/src/eval.zig
@@ -4,6 +4,11 @@ const ArrayList = std.ArrayList;
 const Allocator = std.mem.Allocator;
 const Thread = std.Thread;
 const Mutex = std.Thread.Mutex;
+const c = @cImport({
+    @cInclude("sys/statvfs.h");
+    @cInclude("errno.h");
+    @cInclude("stdio.h");
+});
 
 const syntax = @import("syntax.zig");
 const Command = syntax.Command;
@@ -297,8 +302,12 @@ fn executeCommandWithOutput(command: Command, allocator: Allocator, output_captu
                         }
                     }
 
-                    // Get free disk space (simplified - just use a placeholder)
-                    const bytes_free: u64 = 1024 * 1024 * 1024; // 1GB placeholder
+                    // Get free disk space using statvfs
+                    const path = try std.fs.cwd().realpathAlloc(allocator, dir.path);
+                    defer allocator.free(path);
+                    const bytes_free = getFreeDiskSpace(path) catch |err| switch (err) {
+                        error.AccessDenied => 0,
+                    };
 
                     try output_buffer.writer().print("        {d} File(s) {d:>14} bytes\n", .{ file_count, total_file_bytes });
                     try output_buffer.writer().print("        {d} Dir(s)  {d:>14} bytes free\n", .{ dir_count, bytes_free });
@@ -1077,3 +1086,12 @@ fn executeCommandWithOutput(command: Command, allocator: Allocator, output_captu
 fn isLeapYear(year: u32) bool {
     return (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0);
 }
+
+fn getFreeDiskSpace(path: []const u8) !u64 {
+    var stat: c.struct_statvfs = undefined;
+    if (c.statvfs(path.ptr, &stat) != 0) {
+        _ = c.perror("statvfs");
+        return error.AccessDenied;
+    }
+    return stat.f_bsize * stat.f_bfree;
+}