fallocate.c - ubase - suckless linux base utils | |
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fallocate.c (987B) | |
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1 /* See LICENSE file for copyright and license details. */ | |
2 #include <sys/stat.h> | |
3 | |
4 #include <fcntl.h> | |
5 #include <limits.h> | |
6 #include <stdint.h> | |
7 #include <stdio.h> | |
8 #include <stdlib.h> | |
9 #include <unistd.h> | |
10 | |
11 #include "util.h" | |
12 | |
13 static void | |
14 usage(void) | |
15 { | |
16 eprintf("usage: %s [-o num] -l num file ...\n", argv0); | |
17 } | |
18 | |
19 int | |
20 main(int argc, char *argv[]) | |
21 { | |
22 int fd, ret = 0; | |
23 off_t size = 0, offset = 0; | |
24 | |
25 ARGBEGIN { | |
26 case 'l': | |
27 size = estrtonum(EARGF(usage()), 1, MIN(LLONG_MAX, SIZE_… | |
28 break; | |
29 case 'o': | |
30 offset = estrtonum(EARGF(usage()), 0, MIN(LLONG_MAX, SIZ… | |
31 break; | |
32 default: | |
33 usage(); | |
34 } ARGEND; | |
35 | |
36 if (!argc || !size) | |
37 usage(); | |
38 | |
39 for (; *argv; argc--, argv++) { | |
40 if ((fd = open(*argv, O_RDWR | O_CREAT, 0644)) < 0) { | |
41 weprintf("open %s:", *argv); | |
42 ret = 1; | |
43 } else if (posix_fallocate(fd, offset, size) < 0) { | |
44 weprintf("posix_fallocate %s:", *argv); | |
45 ret = 1; | |
46 } | |
47 | |
48 if (fd >= 0 && close(fd) < 0) { | |
49 weprintf("close %s:", *argv); | |
50 ret = 1; | |
51 } | |
52 } | |
53 | |
54 return ret; | |
55 } |