fix v4l2 buffer ioctl fallbacks for pre-5.6 kernels

[musl] / src / stat / fchmodat.c

diff --git a/src/stat/fchmodat.c b/src/stat/fchmodat.c
index a894cb6..4ee00b0 100644 (file)
--- a/src/stat/fchmodat.c
+++ b/src/stat/fchmodat.c
@@ -2,8 +2,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include "syscall.h"
-
-void __procfdname(char *, unsigned);
+#include "kstat.h"
 
 int fchmodat(int fd, const char *path, mode_t mode, int flag)
 {
@@ -12,7 +11,7 @@ int fchmodat(int fd, const char *path, mode_t mode, int flag)
        if (flag != AT_SYMLINK_NOFOLLOW)
                return __syscall_ret(-EINVAL);
 
-       struct stat st;
+       struct kstat st;
        int ret, fd2;
        char proc[15+3*sizeof(int)];
 
@@ -29,8 +28,10 @@ int fchmodat(int fd, const char *path, mode_t mode, int flag)
 
        __procfdname(proc, fd2);
        ret = __syscall(SYS_fstatat, AT_FDCWD, proc, &st, 0);
-       if (!ret && !S_ISLNK(st.st_mode))
-               ret = __syscall(SYS_fchmodat, AT_FDCWD, proc, mode);
+       if (!ret) {
+               if (S_ISLNK(st.st_mode)) ret = -EOPNOTSUPP;
+               else ret = __syscall(SYS_fchmodat, AT_FDCWD, proc, mode);
+       }
 
        __syscall(SYS_close, fd2);
        return __syscall_ret(ret);