Setup project skeleton

15 files changed, 713 insertions, 0 deletions

diff --git a/src/fs/ramfs/CMakeLists.txt b/src/fs/ramfs/CMakeLists.txt
new file mode 100644
index 0000000..477e8a7
--- /dev/null
+++ b/src/fs/ramfs/CMakeLists.txt
@@ -0,0 +1,20 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(ramfs)
+add_subdirectory(src)
+target_include_directories(ramfs PUBLIC include PRIVATE private_include)
+target_link_libraries(ramfs PUBLIC state c PRIVATE fs drv)
diff --git a/src/fs/ramfs/include/ramfs.h b/src/fs/ramfs/include/ramfs.h
new file mode 100644
index 0000000..74160e1
--- /dev/null
+++ b/src/fs/ramfs/include/ramfs.h
@@ -0,0 +1,43 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RAMFS_H
+#define RAMFS_H
+
+#include <fs/fs.h>
+#include <fs/inode.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stddef.h>
+
+struct ramfs *ramfs_mount(const struct fs_mount *m, struct fs_ret *r);
+int ramfs_mkdir(const struct fs_mkdir *m, struct ramfs *rfs,
+    const union inode_result *i, struct fs_ret *r);
+int ramfs_open(const struct fs_open *o, struct inode *i, struct fs_ret *r);
+int ramfs_read(const struct fs_read *r, struct fs_ret *ret);
+int ramfs_write(const struct fs_write *w, struct fs_ret *r);
+int ramfs_stat(const struct fs_stat *s, const struct ramfs *rfs,
+    const union inode_result *inode, struct fs_ret *r);
+int ramfs_close(struct fs_fd *fd);
+int ramfs_search(const char *path, const struct ramfs *rfs,
+    union inode_result *inode, struct fs_ret *r);
+int ramfs_flags(const union inode_result *i);
+int ramfs_mknod(const char *node, mode_t mode, dev_t dev, struct ramfs *rfs);
+void ramfs_free(struct ramfs *rfs);
+
+#endif
diff --git a/src/fs/ramfs/private_include/ramfs/types.h b/src/fs/ramfs/private_include/ramfs/types.h
new file mode 100644
index 0000000..9be5899
--- /dev/null
+++ b/src/fs/ramfs/private_include/ramfs/types.h
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RAMFS_TYPES_H
+#define RAMFS_TYPES_H
+
+#include <fs/fs.h>
+#include <fs/inode.h>
+
+struct ramfs
+{
+    struct inode *root;
+    ino_t ino;
+};
+
+#endif
diff --git a/src/fs/ramfs/src/CMakeLists.txt b/src/fs/ramfs/src/CMakeLists.txt
new file mode 100644
index 0000000..a35e23e
--- /dev/null
+++ b/src/fs/ramfs/src/CMakeLists.txt
@@ -0,0 +1,29 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(ramfs PRIVATE
+    close.c
+    free.c
+    flags.c
+    mount.c
+    mkdir.c
+    mknod.c
+    open.c
+    stat.c
+    read.c
+    search.c
+    write.c
+)
diff --git a/src/fs/ramfs/src/close.c b/src/fs/ramfs/src/close.c
new file mode 100644
index 0000000..5243a77
--- /dev/null
+++ b/src/fs/ramfs/src/close.c
@@ -0,0 +1,25 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/fs.h>
+
+int ramfs_close(struct fs_fd *const fd)
+{
+    return -1;
+}
diff --git a/src/fs/ramfs/src/flags.c b/src/fs/ramfs/src/flags.c
new file mode 100644
index 0000000..7f51b81
--- /dev/null
+++ b/src/fs/ramfs/src/flags.c
@@ -0,0 +1,25 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/inode.h>
+
+int ramfs_flags(const union inode_result *const i)
+{
+    return i->memi->flags;
+}
diff --git a/src/fs/ramfs/src/free.c b/src/fs/ramfs/src/free.c
new file mode 100644
index 0000000..10fcbd6
--- /dev/null
+++ b/src/fs/ramfs/src/free.c
@@ -0,0 +1,31 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <ramfs/types.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+void ramfs_free(struct ramfs *const r)
+{
+    if (!r)
+        return;
+
+    inode_free(r->root);
+    free(r);
+}
diff --git a/src/fs/ramfs/src/mkdir.c b/src/fs/ramfs/src/mkdir.c
new file mode 100644
index 0000000..f62984d
--- /dev/null
+++ b/src/fs/ramfs/src/mkdir.c
@@ -0,0 +1,79 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <ramfs/types.h>
+#include <fs/fs.h>
+#include <fs/inode.h>
+#include <state.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+static enum state done(void *const args)
+{
+    return STATE_OK;
+}
+
+int ramfs_mkdir(const struct fs_mkdir *const m, struct ramfs *const rfs,
+    const union inode_result *const inode, struct fs_ret *const r)
+{
+    struct timespec ts;
+    struct inode *ni = NULL;
+    struct inode *const parent = inode->memi;
+    char *const name = strdup(m->path);
+
+    if (!name
+        || clock_gettime(CLOCK_REALTIME, &ts)
+        || !(ni = malloc(sizeof *ni)))
+        goto failure;
+
+    *ni = (const struct inode)
+    {
+        .name = name,
+        .mode = m->mode,
+        .uid = m->uid,
+        .gid = m->gid,
+        .flags = INODE_DIR,
+        .atim = ts,
+        .ctim = ts,
+        .mtim = ts,
+        .ino = rfs->ino++,
+        .parent = parent
+    };
+
+    if (!parent->child)
+        parent->child = ni;
+    else
+        for (struct inode *i = parent->child; i; i = i->right)
+            if (!i->right)
+            {
+                i->right = ni;
+                ni->left = i;
+                break;
+            }
+
+    parent->atim = parent->mtim = ts;
+    *r = (const struct fs_ret){.f = done};
+    return 0;
+
+failure:
+    free(ni);
+    free(name);
+    return -1;
+}
diff --git a/src/fs/ramfs/src/mknod.c b/src/fs/ramfs/src/mknod.c
new file mode 100644
index 0000000..d142ab1
--- /dev/null
+++ b/src/fs/ramfs/src/mknod.c
@@ -0,0 +1,87 @@
+
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <ramfs/types.h>
+#include <fs/inode.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+static struct inode *find(const char *const node, struct inode *const root)
+{
+    for (struct inode *c = root->child; c; c = c->right)
+        if (!strcmp(c->name, node))
+            return c;
+
+    return NULL;
+}
+
+int ramfs_mknod(const char *const node, const mode_t mode, const dev_t dev,
+    struct ramfs *const rfs)
+{
+    struct inode *const r = rfs->root,
+        *const inode = find(node, r),
+        *newinode = NULL;
+    char *nodedup = NULL;
+    struct timespec ts;
+
+    if (inode)
+    {
+        errno = EEXIST;
+        goto failure;
+    }
+    else if (clock_gettime(CLOCK_REALTIME, &ts)
+        || !(nodedup = strdup(node))
+        || !(newinode = malloc(sizeof *newinode)))
+        goto failure;
+
+    *newinode = (const struct inode)
+    {
+        .atim = ts,
+        .ctim = ts,
+        .mtim = ts,
+        .flags = INODE_BLOCKDEV,
+        .mode = mode,
+        .parent = rfs->root,
+        .name = nodedup
+    };
+
+    if (!r->child)
+        r->child = newinode;
+    else
+        for (struct inode *c = r->child; c; c = c->right)
+            if (!c->right)
+            {
+                c->right = newinode;
+                newinode->left = c;
+                break;
+            }
+
+    r->atim = r->mtim = ts;
+    return 0;
+
+failure:
+    free(nodedup);
+    free(newinode);
+    return -1;
+}
diff --git a/src/fs/ramfs/src/mount.c b/src/fs/ramfs/src/mount.c
new file mode 100644
index 0000000..567c2da
--- /dev/null
+++ b/src/fs/ramfs/src/mount.c
@@ -0,0 +1,69 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <ramfs/types.h>
+#include <fs/fs.h>
+#include <state.h>
+#include <sys/types.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+static enum state mount(void *const args)
+{
+    return STATE_OK;
+}
+
+struct ramfs *ramfs_mount(const struct fs_mount *const m,
+    struct fs_ret *const r)
+{
+    struct ramfs *ret = NULL;
+    struct timespec ts;
+    char *const name = strdup("/");
+    struct inode *root = NULL;
+
+    if (!name
+        || clock_gettime(CLOCK_REALTIME, &ts)
+        || !(root = malloc(sizeof *root))
+        || !(ret = malloc(sizeof *ret)))
+        goto failure;
+
+    *root = (const struct inode)
+    {
+        .name = name,
+        .mode = m->mode,
+        .uid = m->uid,
+        .gid = m->gid,
+        .atim = ts,
+        .mtim = ts,
+        .ctim = ts
+    };
+
+    *ret = (const struct ramfs){.root = root};
+    *r = (const struct fs_ret){.f = mount};
+    ret->ino++;
+    return ret;
+
+failure:
+    free(root);
+    free(ret);
+    free(name);
+    return NULL;
+}
diff --git a/src/fs/ramfs/src/open.c b/src/fs/ramfs/src/open.c
new file mode 100644
index 0000000..894b160
--- /dev/null
+++ b/src/fs/ramfs/src/open.c
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/fs.h>
+
+int ramfs_open(const struct fs_open *const o,struct inode *const i,
+    struct fs_ret *const r)
+{
+    return -1;
+}
diff --git a/src/fs/ramfs/src/read.c b/src/fs/ramfs/src/read.c
new file mode 100644
index 0000000..cc96744
--- /dev/null
+++ b/src/fs/ramfs/src/read.c
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/fs.h>
+#include <stddef.h>
+
+int ramfs_read(const struct fs_read *const r, struct fs_ret *const ret)
+{
+    return -1;
+}
diff --git a/src/fs/ramfs/src/search.c b/src/fs/ramfs/src/search.c
new file mode 100644
index 0000000..24e2a98
--- /dev/null
+++ b/src/fs/ramfs/src/search.c
@@ -0,0 +1,143 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <ramfs/types.h>
+#include <fs/fs.h>
+#include <state.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct search
+{
+    union inode_result *inode;
+    const struct ramfs *rfs;
+    struct fs_ret r, *pr;
+    const char *path;
+};
+
+static void free_search(struct search *const s)
+{
+    free(s);
+}
+
+static int find_node(const char *const path, struct inode **const out,
+    size_t *const i)
+{
+    int ret = -1;
+    char *node;
+    struct inode *volatile const inode = *out;
+
+    if (fs_next(path, &node, i))
+        return -1;
+    else if (!strcmp(inode->name, node))
+    {
+        if (*i >= strlen(path))
+        {
+            free(node);
+            return 1;
+        }
+
+        *out = inode->child;
+    }
+    else
+    {
+        bool found = false;
+
+        for (struct inode *in = inode->right; in; in = in->right)
+            if (!strcmp(in->name, node))
+            {
+                if (*i >= strlen(path))
+                {
+                    *out = in;
+                    free(node);
+                    return 1;
+                }
+
+                *out = in->child;
+                found = true;
+                break;
+            }
+
+        if (!found)
+            goto end;
+    }
+
+    ret = 0;
+
+end:
+    free(node);
+    return ret;
+}
+
+static enum state search(void *const args)
+{
+    enum state ret = STATE_FATAL;
+    struct search *const s = args;
+    struct inode *inode = s->rfs->root;
+    size_t i = 0;
+
+    for (;;)
+    {
+        const int n = find_node(s->path, &inode, &i);
+
+        if (n < 0)
+            goto end;
+        else if (n > 0)
+            break;
+    }
+
+    s->inode->memi = inode;
+    *s->pr = s->r;
+    ret = STATE_AGAIN;
+
+end:
+    free_search(s);
+    return ret;
+}
+
+int ramfs_search(const char *const path, const struct ramfs *const rfs,
+    union inode_result *const inode, struct fs_ret *const r)
+{
+    struct search *const s = malloc(sizeof *s);
+
+    if (!s)
+        goto failure;
+
+    *s = (const struct search)
+    {
+        .inode = inode,
+        .path = path,
+        .rfs = rfs,
+        .r = *r,
+        .pr = r
+    };
+
+    *r = (const struct fs_ret)
+    {
+        .f = search,
+        .args = s
+    };
+
+    return 0;
+
+failure:
+    free(s);
+    return -1;
+}
diff --git a/src/fs/ramfs/src/stat.c b/src/fs/ramfs/src/stat.c
new file mode 100644
index 0000000..6bb1b23
--- /dev/null
+++ b/src/fs/ramfs/src/stat.c
@@ -0,0 +1,53 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/fs.h>
+#include <state.h>
+#include <sys/stat.h>
+
+static enum state done(void *const args)
+{
+    return STATE_OK;
+}
+
+int ramfs_stat(const struct fs_stat *const s, const struct ramfs *const rfs,
+    const union inode_result *const inode, struct fs_ret *const r)
+{
+    const struct inode *const i = inode->memi;
+
+    *s->sb = (const struct stat)
+    {
+        .st_atim = i->atim,
+        .st_ctim = i->ctim,
+        .st_mtim = i->mtim,
+        .st_size = i->size,
+        .st_blksize = 1,
+        .st_ino = i->ino,
+        .st_uid = i->uid,
+        .st_gid = i->gid,
+        .st_mode = i->mode
+    };
+
+    *r = (const struct fs_ret)
+    {
+        .f = done
+    };
+
+    return 0;
+}
diff --git a/src/fs/ramfs/src/write.c b/src/fs/ramfs/src/write.c
new file mode 100644
index 0000000..ca49c22
--- /dev/null
+++ b/src/fs/ramfs/src/write.c
@@ -0,0 +1,26 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <ramfs.h>
+#include <fs/fs.h>
+#include <stddef.h>
+
+int ramfs_write(const struct fs_write *const w, struct fs_ret *const r)
+{
+    return -1;
+}