1 files changed, 39 insertions, 0 deletions
diff --git a/libc-bottom-half/sources/getcwd.c b/libc-bottom-half/sources/getcwd.c
new file mode 100644
index 0000000..3b1ce70
--- /dev/null
+++ b/libc-bottom-half/sources/getcwd.c
@@ -0,0 +1,39 @@
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include "lock.h"
+
+char *__wasilibc_cwd = "/";
+
+#ifdef _REENTRANT
+static volatile int lock[1];
+void __wasilibc_cwd_lock(void) { LOCK(lock); }
+void __wasilibc_cwd_unlock(void) { UNLOCK(lock); }
+#else
+#define __wasilibc_cwd_lock() (void)0
+#define __wasilibc_cwd_unlock() (void)0
+#endif
+
+char *getcwd(char *buf, size_t size)
+{
+    __wasilibc_cwd_lock();
+    if (!buf) {
+        buf = strdup(__wasilibc_cwd);
+        if (!buf) {
+            errno = ENOMEM;
+            __wasilibc_cwd_unlock();
+            return NULL;
+        }
+    } else {
+        size_t len = strlen(__wasilibc_cwd);
+        if (size < len + 1) {
+            errno = ERANGE;
+            __wasilibc_cwd_unlock();
+            return NULL;
+        }
+        strcpy(buf, __wasilibc_cwd);
+    }
+    __wasilibc_cwd_unlock();
+    return buf;
+}
+