45 lines
742 B
C
45 lines
742 B
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [-o offset] -l length file\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 fd;
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off_t size = 0, offset = 0;
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ARGBEGIN {
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case 'l':
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size = estrtol(EARGF(usage()), 10);
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break;
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case 'o':
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offset = estrtol(EARGF(usage()), 10);
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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 || !size)
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usage();
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fd = open(argv[0], O_RDWR | O_CREAT, 0644);
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if (fd < 0)
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eprintf("open %s:", argv[0]);
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if (posix_fallocate(fd, offset, size) < 0)
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eprintf("posix_fallocate:");
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close(fd);
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return EXIT_SUCCESS;
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}
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