1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/syscalls/open_process.c b/kernel/syscalls/open_process.c
new file mode 100644
index 0000000..8e3a35e
--- /dev/null
+++ b/kernel/syscalls/open_process.c
@@ -0,0 +1,26 @@
+#include <assert.h>
+#include <errno.h>
+#include <sched/scheduler.h>
+
+int syscall_open_process(int pid) {
+  // TODO: Permission check
+  process_t *process = (process_t *)ready_queue;
+  for (; process; process = process->next) {
+    if (pid == process->pid) {
+      break;
+    }
+  }
+  if (!process) {
+    return -ESRCH;
+  }
+
+  vfs_inode_t *inode = vfs_create_inode(
+      process->pid, 0 /*type*/, 0 /*has_data*/, 0 /*can_write*/, 1 /*is_open*/,
+      process /*internal_object*/, 0 /*file_size*/, NULL /*open*/,
+      NULL /*create_file*/, NULL /*read*/, NULL /*write*/, NULL /*close*/,
+      NULL /*create_directory*/, NULL /*get_vm_object*/, NULL /*truncate*/,
+      NULL /*stat*/, process_signal);
+  int rc = vfs_create_fd(0, 0, 0, inode, NULL);
+  assert(rc >= 0);
+  return rc;
+}