1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <nl_types.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/** operands
INFILE [file...] The name of one or more files to print to stdout. DEF(stdin) DASH(stdin)
**/
static int cat(const char *path)
{
FILE *f = stdin;
if (path && strcmp("-", path)) {
f = fopen(path, "r");
}
if (f == NULL) {
static char *fmt = NULL;
const char *def = "cat: Couldn't open %s: %s\n";
if (fmt == NULL) {
nl_catd catd = catopen("cat", NL_CAT_LOCALE);
fmt = catgets(catd, NL_SETD, 1, def);
}
fprintf(stderr, fmt, path ? path : "stdin", strerror(errno));
return 1;
}
int c;
while ((c = fgetc(f)) != EOF) {
fputc(c, stdout);
}
if (f != stdin) {
fclose(f);
}
return 0;
}
int main(int argc, char *argv[])
{
int ret = 0, c = 0;
while ((c = getopt(argc, argv, "u")) != -1) {
switch(c) {
case 'u': /** Do not buffer output **/
setbuf(stdout, NULL);
break;
default:
return 1;
}
}
do {
ret |= cat(argv[optind++]);
} while (optind < argc);
return ret;
}
/**cat en_US@color
1 \033[31mcat: Couldn't open \033[0;41;23m%s\033[0;31m: %s\033[0m\n
**/
|
