Changed gz_open to ruturn a stream

[oweals/busybox.git] / freeramdisk.c

diff --git a/freeramdisk.c b/freeramdisk.c
index d373bcbf79f3d8a7e5725c5b295b6d028cf2d580..cf25fae6abb61f6d0cf27ff0a0aa29ab039c1ab3 100644 (file)
--- a/freeramdisk.c
+++ b/freeramdisk.c
@@ -23,43 +23,36 @@
 
 #include <stdio.h>
 #include <string.h>
-#include <linux/fs.h>
 #include <sys/types.h>
-#include <sys/stat.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <errno.h>
-#include "internal.h"
+#include <stdlib.h>
+#include "busybox.h"
 
 
-
-static const char freeramdisk_usage[] =
-       "freeramdisk DEVICE\n\n"
-       "Free all memory used by the specified ramdisk.\n";
+/* From linux/fs.h */
+#define BLKFLSBUF  _IO(0x12,97)        /* flush buffer cache */
 
 extern int
 freeramdisk_main(int argc, char **argv)
 {
-       char  rname[256] = "/dev/ram";
        int   f;
 
-       if (argc < 2 || ( argv[1] && *argv[1] == '-')) {
-               usage(freeramdisk_usage);
+       if (argc != 2 || *argv[1] == '-') {
+               show_usage();
        }
 
-       if (argc >1)
-               strcpy(rname, argv[1]);
-
-       if ((f = open(rname, O_RDWR)) == -1) {
-               fatalError( "freeramdisk: cannot open %s: %s\n", rname, strerror(errno));
+       if ((f = open(argv[1], O_RDWR)) == -1) {
+               perror_msg_and_die("cannot open %s", argv[1]);
        }
        if (ioctl(f, BLKFLSBUF) < 0) {
-               fatalError( "freeramdisk: failed ioctl on %s: %s\n", rname, strerror(errno));
+               perror_msg_and_die("failed ioctl on %s", argv[1]);
        }
        /* Don't bother closing.  Exit does
         * that, so we can save a few bytes */
        /* close(f); */
-       exit(TRUE);
+       return EXIT_SUCCESS;
 }
 
 /*