cat.c - sbase - suckless unix tools | |
git clone git://git.suckless.org/sbase | |
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cat.c (824B) | |
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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 } |