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 <errno.h>
18 #include <string.h>
19 
20 #include "gmid.h"
21 
22 static sigset_t set;
23 
24 void
25 block_signals(void)
26 {
27 	sigset_t new;
28 
29 	sigemptyset(&new);
30 	sigaddset(&new, SIGHUP);
31 	sigprocmask(SIG_BLOCK, &new, &set);
32 }
33 
34 void
35 unblock_signals(void)
36 {
37 	sigprocmask(SIG_SETMASK, &set, NULL);
38 }
39 
40 int
41 starts_with(const char *str, const char *prefix)
42 {
43 	size_t i;
44 
45 	if (prefix == NULL)
46 		return 0;
47 
48 	for (i = 0; prefix[i] != '\0'; ++i)
49 		if (str[i] != prefix[i])
50 			return 0;
51 	return 1;
52 }
53 
54 int
55 ends_with(const char *str, const char *sufx)
56 {
57 	size_t i, j;
58 
59 	i = strlen(str);
60 	j = strlen(sufx);
61 
62 	if (j > i)
63 		return 0;
64 
65 	i -= j;
66 	for (j = 0; str[i] != '\0'; i++, j++)
67 		if (str[i] != sufx[j])
68 			return 0;
69 	return 1;
70 }
71 
72 ssize_t
73 filesize(int fd)
74 {
75 	ssize_t len;
76 
77 	if ((len = lseek(fd, 0, SEEK_END)) == -1)
78 		return -1;
79 	if (lseek(fd, 0, SEEK_SET) == -1)
80 		return -1;
81 	return len;
82 }
83 
84 char *
85 absolutify_path(const char *path)
86 {
87 	char *wd, *r;
88 
89 	if (*path == '/') {
90 		if ((r = strdup(path)) == NULL)
91 			err(1, "strdup");
92 		return r;
93 	}
94 
95 	wd = getcwd(NULL, 0);
96 	if (asprintf(&r, "%s/%s", wd, path) == -1)
97 		err(1, "asprintf");
98 	free(wd);
99 	return r;
100 }
101 
102 char *
103 xstrdup(const char *s)
104 {
105 	char *d;
106 
107 	if ((d = strdup(s)) == NULL)
108 		err(1, "strdup");
109 	return d;
110 }