cuserid: support invocation with a null pointer argument

[musl] / src / unistd / chown.c

diff --git a/src/unistd/chown.c b/src/unistd/chown.c
index b89b173..14b0325 100644 (file)
--- a/src/unistd/chown.c
+++ b/src/unistd/chown.c
@@ -1,7 +1,12 @@
 #include <unistd.h>
+#include <fcntl.h>
 #include "syscall.h"
 
 int chown(const char *path, uid_t uid, gid_t gid)
 {
-       return syscall3(__NR_chown, (long)path, uid, gid);
+#ifdef SYS_chown
+       return syscall(SYS_chown, path, uid, gid);
+#else
+       return syscall(SYS_fchownat, AT_FDCWD, path, uid, gid, 0);
+#endif
 }