1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "telescope.h"
18 
19 #include <fcntl.h>
20 
21 int
22 mark_nonblock(int fd)
23 {
24 	int flags;
25 
26 	if ((flags = fcntl(fd, F_GETFL)) == -1)
27                 return 0;
28 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
29                 return 0;
30 	return 1;
31 }
32 
33 char *
34 telescope_strnchr(char *b, char d, size_t len)
35 {
36 	size_t i;
37 
38 	for (i = 0; i < len; ++i) {
39 		if (b[i] == d)
40 			return &b[i];
41 	}
42 
43 	return NULL;
44 }