fsfreeze.c (899B)
1 /* See LICENSE file for copyright and license details. */ 2 #include <sys/ioctl.h> 3 #include <sys/stat.h> 4 #include <sys/types.h> 5 6 #include <fcntl.h> 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <unistd.h> 10 11 #include "util.h" 12 13 #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ 14 #define FITHAW _IOWR('X', 120, int) /* Thaw */ 15 16 static void 17 usage(void) 18 { 19 eprintf("usage: %s [-f] [-u] mountpoint\n", argv0); 20 } 21 22 int 23 main(int argc, char *argv[]) 24 { 25 int fflag = 0; 26 int uflag = 0; 27 long p = 1; 28 int fd; 29 30 ARGBEGIN { 31 case 'f': 32 fflag = 1; 33 break; 34 case 'u': 35 uflag = 1; 36 break; 37 default: 38 usage(); 39 } ARGEND; 40 41 if (argc != 1) 42 usage(); 43 44 if ((fflag ^ uflag) == 0) 45 usage(); 46 47 fd = open(argv[0], O_RDONLY); 48 if (fd < 0) 49 eprintf("open: %s:", argv[0]); 50 if (ioctl(fd, fflag == 1 ? FIFREEZE : FITHAW, &p) < 0) 51 eprintf("%s %s:", fflag == 1 ? "FIFREEZE" : "FITHAW", argv[0]); 52 close(fd); 53 return 0; 54 }