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	sponge.c - sbase - suckless unix tools
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	---
	sponge.c (701B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <fcntl.h>
	3 #include <stdlib.h>
	4 #include <unistd.h>
	5
	6 #include "util.h"
	7
	8 static void
	9 usage(void)
	10 {
	11 eprintf("usage: %s file\n", argv0);
	12 }
	13
	14 int
	15 main(int argc, char *argv[])
	16 {
	17 char tmp[] = "/tmp/sponge-XXXXXX";
	18 int fd, tmpfd;
	19
	20 ARGBEGIN {
	21 default:
	22 usage();
	23 } ARGEND
	24
	25 if (argc != 1)
	26 usage();
	27
	28 if ((tmpfd = mkstemp(tmp)) < 0)
	29 eprintf("mkstemp:");
	30 unlink(tmp);
	31 if (concat(0, "<stdin>", tmpfd, "<tmpfile>") < 0)
	32 return 1;
	33 if (lseek(tmpfd, 0, SEEK_SET) < 0)
	34 eprintf("lseek:");
	35
	36 if ((fd = creat(argv[0], 0666)) < 0)
	37 eprintf("creat %s:", argv[0]);
	38 if (concat(tmpfd, "<tmpfile>", fd, argv[0]) < 0)
	39 return 1;
	40
	41 return 0;
	42 }