v4l-utils: use openat when available

New architectures such as 64-Bit arm build kernels without legacy
system calls - Such as the the no-at system calls. Thus, use
SYS_openat whenever it is available.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/lib/libv4lconvert/libv4lsyscall-priv.h b/lib/libv4lconvert/libv4lsyscall-priv.h
index 2dac49a..cdd38bc 100644 (file)
--- a/lib/libv4lconvert/libv4lsyscall-priv.h
+++ b/lib/libv4lconvert/libv4lsyscall-priv.h
@@ -72,8 +72,13 @@ typedef off_t __off_t;
 
 #ifndef CONFIG_SYS_WRAPPER
 
+#ifdef SYS_openat
+#define SYS_OPEN(file, oflag, mode) \
+       syscall(SYS_openat, AT_FDCWD, (const char *)(file), (int)(oflag), (mode_t)(mode))
+#else
 #define SYS_OPEN(file, oflag, mode) \
        syscall(SYS_open, (const char *)(file), (int)(oflag), (mode_t)(mode))
+#endif
 #define SYS_CLOSE(fd) \
        syscall(SYS_close, (int)(fd))
 #define SYS_IOCTL(fd, cmd, arg) \