1 2 #include <minix/paths.h> 3 4 #include <sys/ioc_memory.h> 5 #include <stdio.h> 6 #include <fcntl.h> 7 #include <stdlib.h> 8 9 int 10 main(int argc, char *argv[]) 11 { 12 int fd; 13 signed long size; 14 char *d; 15 16 if(argc < 2 || argc > 3) { 17 fprintf(stderr, "usage: %s <size in kB> [device]\n", 18 argv[0]); 19 return 1; 20 } 21 22 d = argc == 2 ? _PATH_RAMDISK : argv[2]; 23 if((fd=open(d, O_RDONLY)) < 0) { 24 perror(d); 25 return 1; 26 } 27 28 #define KFACTOR 1024 29 size = atol(argv[1])*KFACTOR; 30 31 if(size < 0) { 32 fprintf(stderr, "size should be non-negative.\n"); 33 return 1; 34 } 35 36 if(ioctl(fd, MIOCRAMSIZE, &size) < 0) { 37 perror("MIOCRAMSIZE"); 38 return 1; 39 } 40 41 fprintf(stderr, "size on %s set to %ldkB\n", d, size/KFACTOR); 42 43 return 0; 44 } 45 46