From 03c5cb09b570a88405a1a10f91f8470e4d42e1ca Mon Sep 17 00:00:00 2001
From: IonutParau <ionut.alex.parau@gmail.com>
Date: Sun, 6 Jul 2025 00:01:33 +0200
Subject: [PATCH] filesystem seek

---
 src/components/filesystem.c |  3 ++-
 src/emulator.c              | 16 +++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/components/filesystem.c b/src/components/filesystem.c
index 15f10ba..6f4a606 100644
--- a/src/components/filesystem.c
+++ b/src/components/filesystem.c
@@ -396,12 +396,13 @@ void nn_fs_seek(nn_filesystem *fs, void *_, nn_component *component, nn_computer
     // size_t capacity = fs->spaceTotal(component, fs->userdata);
     int moved = 0;
 
-    /* size_t pos = */ fs->seek(component, fs->userdata, fd, whence, off, &moved);
+    size_t pos = fs->seek(component, fs->userdata, fd, whence, off, &moved);
     if(moved < 0) moved = -moved;
 
     // do not ask where it comes from, balance is hard
     nn_fs_readCost(fs, 1, component, computer);
     nn_fs_seekCost(fs, nn_fs_countChunks(fs, moved, component), component, computer);
+    nn_return_integer(computer, pos);
 }
 
 void nn_loadFilesystemTable(nn_universe *universe) {
diff --git a/src/emulator.c b/src/emulator.c
index f00fbfc..777f34a 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -181,6 +181,20 @@ size_t ne_fs_read(nn_component *component, ne_fs *fs, int fd, char *buf, size_t
     return fread(buf, sizeof(char), required, f);
 }
 
+size_t ne_fs_seek(nn_component *component, ne_fs *fs, int fd, const char *whence, int off, int *moved) {
+    FILE *f = fs->files[fd];
+    *moved = 0;
+    int w = SEEK_SET;
+    if(strcmp(whence, "cur") == 0) {
+        w = SEEK_CUR;
+    }
+    if(strcmp(whence, "end") == 0) {
+        w = SEEK_END;
+    }
+    fseek(f, w, off);
+    return ftell(f);
+}
+
 char **ne_fs_list(nn_Alloc *alloc, nn_component *component, ne_fs *fs, const char *path, size_t *len) {
     const char *p = ne_fs_diskPath(component, path);
     if(p[0] == '/') p++;
@@ -628,7 +642,7 @@ int main() {
         .close = (void *)ne_fs_close,
         .write = (void *)ne_fs_write,
         .read = (void *)ne_fs_read,
-        .seek = NULL,
+        .seek = (void *)ne_fs_seek,
     };
     nn_addFileSystem(computer, "OpenOS", 1, &genericFS);