morpheus-base

morpheus base system
git clone git://git.2f30.org/morpheus-base
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sponge.c (594B)

      1 /* See LICENSE file for copyright and license details. */
      2 #include <stdio.h>
      3 #include <stdlib.h>
      4 
      5 #include "text.h"
      6 #include "util.h"
      7 
      8 static void
      9 usage(void)
     10 {
     11 	eprintf("usage: sponge file\n");
     12 }
     13 
     14 int
     15 main(int argc, char *argv[])
     16 {
     17 	FILE *fp, *tmpfp;
     18 
     19 	ARGBEGIN {
     20 	default:
     21 		usage();
     22 	} ARGEND;
     23 
     24 	if (argc != 1)
     25 		usage();
     26 
     27 	if (!(tmpfp = tmpfile()))
     28 		eprintf("tmpfile:");
     29 
     30 	concat(stdin, "<stdin>", tmpfp, "<tmpfile>");
     31 	rewind(tmpfp);
     32 
     33 	if (!(fp = fopen(argv[0], "w")))
     34 		eprintf("fopen %s:", argv[0]);
     35 	concat(tmpfp, "<tmpfile>", fp, argv[0]);
     36 
     37 	fclose(fp);
     38 	fclose(tmpfp);
     39 
     40 	return 0;
     41 }