source: trunk/minix/commands/simple/ramdisk.c@ 15

#include <minix/paths.h>

#include <sys/ioc_memory.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>

int
main(int argc, char *argv[])
{
        int fd;
        signed long size;
        if((fd=open(_PATH_RAMDISK, O_RDONLY)) < 0) {
                perror(_PATH_RAMDISK);
                return 1;
        }

        if(argc != 2) {
                fprintf(stderr, "usage: %s <size in bytes>\n", argv[0]);
                return 1;
        }

        size = atol(argv[1]);

        if(size <= 0) {
                fprintf(stderr, "size should be positive.\n");
                return 1;
        }

        if(ioctl(fd, MIOCRAMSIZE, &size) < 0) {
                perror("MIOCRAMSIZE");
                return 1;
        }

        return 0;
}