Simplified version checking.

[oweals/busybox.git] / fdflush.c

diff --git a/fdflush.c b/fdflush.c
index 0b154c8a605fefc13577ff4668a3a8257675f32d..28f5cb68a02244da47ab04a0073e9d6aff2c317b 100644 (file)
--- a/fdflush.c
+++ b/fdflush.c
@@ -21,34 +21,27 @@
  *
  */
 
-#include "internal.h"
 #include <stdio.h>
 #include <sys/ioctl.h>
-#include <linux/fd.h>
 #include <fcntl.h>
+#include <stdlib.h>
+#include "busybox.h"
 
+/* From <linux/fd.h> */
+#define FDFLUSH  _IO(2,0x4b)
 
 extern int fdflush_main(int argc, char **argv)
 {
-       int value;
        int fd;
 
-       if (argc <= 1 || **(argv++) == '-') {
-               usage("fdflush device\n");
-       }
+       if (argc <= 1 || **(++argv) == '-')
+               show_usage();
 
-       fd = open(*argv, 0);
-       if (fd < 0) {
-               perror(*argv);
-               exit(FALSE);
-       }
+       if ((fd = open(*argv, 0)) < 0)
+               perror_msg_and_die("%s", *argv);
 
-       value = ioctl(fd, FDFLUSH, 0);
-       close(fd);
+       if (ioctl(fd, FDFLUSH, 0))
+               perror_msg_and_die("%s", *argv);
 
-       if (value) {
-               perror(*argv);
-               exit(FALSE);
-       }
-       exit(TRUE);
+       return EXIT_SUCCESS;
 }