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	cat.c - sbase - suckless unix tools
	git clone git://git.suckless.org/sbase
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	---
	cat.c (824B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <fcntl.h>
	3 #include <string.h>
	4 #include <unistd.h>
	5
	6 #include "util.h"
	7
	8 static void
	9 usage(void)
	10 {
	11 eprintf("usage: %s [-u] [file ...]\n", argv0);
	12 }
	13
	14 int
	15 main(int argc, char *argv[])
	16 {
	17 int fd, ret = 0;
	18
	19 ARGBEGIN {
	20 case 'u':
	21 break;
	22 default:
	23 usage();
	24 } ARGEND
	25
	26 if (!argc) {
	27 if (concat(0, "<stdin>", 1, "<stdout>") < 0)
	28 ret = 1;
	29 } else {
	30 for (; *argv; argc--, argv++) {
	31 if (!strcmp(*argv, "-")) {
	32 *argv = "<stdin>";
	33 fd = 0;
	34 } else if ((fd = open(*argv, O_RDONLY)) < 0) {
	35 weprintf("open %s:", *argv);
	36 ret = 1;
	37 continue;
	38 }
	39 switch (concat(fd, *argv, 1, "<stdout>")) {
	40 case -1:
	41 ret = 1;
	42 break;
	43 case -2:
	44 return 1; /* exit on write error */
	45 }
	46 if (fd != 0)
	47 close(fd);
	48 }
	49 }
	50
	51 return ret;
	52 }