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-rw-r--r--libc-bottom-half/sources/getcwd.c39
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;
+}
+