tools/nolibc: add support for fchdir()

Add support for the file descriptor based variant of chdir().

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index d0ba30ba029c..28481feedb37 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -118,6 +118,7 @@ void *sbrk(intptr_t inc)
 
 /*
  * int chdir(const char *path);
+ * int fchdir(int fildes);
  */
 
 static __attribute__((unused))
@@ -132,6 +133,18 @@ int chdir(const char *path)
 	return __sysret(sys_chdir(path));
 }
 
+static __attribute__((unused))
+int sys_fchdir(int fildes)
+{
+	return my_syscall1(__NR_fchdir, fildes);
+}
+
+static __attribute__((unused))
+int fchdir(int fildes)
+{
+	return __sysret(sys_fchdir(fildes));
+}
+
 
 /*
  * int chmod(const char *path, mode_t mode);