i86/elks/elkscmd/disk_utils/ramdisk.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <linuxmt/rd.h>
   6
   7 #define MAX_SIZE 640 /* 1 KB blocks */
   8
   9 int main(argc, argv)
  10 int argc;
  11 char **argv;
  12 {
  13         int i;
  14         int fd;
  15         int size = 0;
  16
  17         if ((argc != 4) && (argc != 3)) {
  18                 fprintf(stderr, "usage: ramdisk /dev/ram? {make | kill} [size in 1 KB blocks]\n");
  19                 exit(1);
  20         }
  21
  22         if (argc == 4)
  23                 sscanf(argv[3], "%d", &size);
  24         else
  25                 size = 64; /* default */
  26
  27         if ((size < 1) || (size > MAX_SIZE)) {
  28                 fprintf(stderr, "ramdisk: invalid size; use integer in range of 1 .. %d\n", MAX_SIZE);
  29                 exit(1);
  30         }
  31         if (( fd = open(argv[1], 0) ) == -1) {
  32                 perror("ramdisk");
  33                 exit(1);
  34         }
  35         if (strcmp(argv[2],"make") == 0) {
  36                 if (ioctl(fd, RDCREATE, size)) {
  37                         perror("ramdisk");
  38                         exit(1);
  39                 }
  40                 fprintf(stdout,"ramdisk: %d KB ramdisk created on %s\n", size, argv[1]);
  41                 exit(0);
  42         }
  43         if (strcmp(argv[2],"kill") == 0) {
  44                 if (ioctl(fd, RDDESTROY, 0)) {
  45                         perror("ramdisk");
  46                         exit(1);
  47                 }
  48                 fprintf(stdout,"ramdisk destroyed on %s\n", argv[1]);
  49                 exit(0);
  50         }
  51 }