[PATCH v3 2/3] tools/nolibc: unistd: Add readlink()

[Daniel Palmer]

Add readlink(). This is needed to test getcwd().

Signed-off-by: Daniel Palmer <daniel@xxxxxxxxx>
---
 tools/include/nolibc/unistd.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index 2e0edbc26315..a264a20da13d 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -128,6 +128,22 @@ int msleep(unsigned int msecs)
 		return 0;
 }
 
+/*
+ * ssize_t readlink(const char *path, char *buf, size_t bufsiz);
+ */
+
+static __attribute__((unused))
+ssize_t _sys_readlink(const char *path, char *buf, size_t bufsiz)
+{
+	return __nolibc_syscall4(__NR_readlinkat, AT_FDCWD, path, buf, bufsiz);
+}
+
+static __attribute__((unused))
+ssize_t readlink(const char *path, char *buf, size_t bufsiz)
+{
+	return __sysret(_sys_readlink(path, buf, bufsiz));
+}
+
 static __attribute__((unused))
 unsigned int sleep(unsigned int seconds)
 {
-- 
2.53.0