55 lines
899 B
C
55 lines
899 B
C
/* See LICENSE file for copyright and license details. */
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "util.h"
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#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
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#define FITHAW _IOWR('X', 120, int) /* Thaw */
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static void
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usage(void)
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{
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eprintf("usage: %s [-f | -u] mountpoint\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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int fflag = 0;
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int uflag = 0;
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long p = 1;
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int fd;
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ARGBEGIN {
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case 'f':
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fflag = 1;
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break;
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case 'u':
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uflag = 1;
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break;
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default:
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usage();
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} ARGEND;
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if (argc != 1)
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usage();
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if ((fflag ^ uflag) == 0)
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usage();
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fd = open(argv[0], O_RDONLY);
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if (fd < 0)
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eprintf("open: %s:", argv[0]);
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if (ioctl(fd, fflag == 1 ? FIFREEZE : FITHAW, &p) < 0)
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eprintf("%s %s:", fflag == 1 ? "FIFREEZE" : "FITHAW", argv[0]);
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close(fd);
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return 0;
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}
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