2 files changed, 60 insertions, 0 deletions
diff --git a/programs/libc/fcntl/CMakeLists.txt b/programs/libc/fcntl/CMakeLists.txt
new file mode 100644
index 0000000..c0ca1d1
--- /dev/null
+++ b/programs/libc/fcntl/CMakeLists.txt
@@ -0,0 +1,19 @@
+# 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(c PRIVATE
+    open.c
+)
diff --git a/programs/libc/fcntl/open.c b/programs/libc/fcntl/open.c
new file mode 100644
index 0000000..71511a7
--- /dev/null
+++ b/programs/libc/fcntl/open.c
@@ -0,0 +1,41 @@
+/*
+ * 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 <fcntl.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stdarg.h>
+
+int open(const char *const path, const int flags, ...)
+{
+    int __wnix_open(const char *, int, mode_t, int *) __attribute__((
+        __import_module__("wnix"),
+        __import_name__("open")
+    ));
+
+    mode_t mode = 0;
+    va_list ap;
+
+    va_start(ap, flags);
+
+    if (flags & O_CREAT)
+        mode = va_arg(ap, mode_t);
+
+    va_end(ap);
+    return __wnix_open(path, flags, mode, &errno);
+}